diff options
Diffstat (limited to 'drivers/net/wireless/iwlegacy/common.c')
| -rw-r--r-- | drivers/net/wireless/iwlegacy/common.c | 5586 |
1 files changed, 0 insertions, 5586 deletions
diff --git a/drivers/net/wireless/iwlegacy/common.c b/drivers/net/wireless/iwlegacy/common.c deleted file mode 100644 index 887114582583..000000000000 --- a/drivers/net/wireless/iwlegacy/common.c +++ /dev/null @@ -1,5586 +0,0 @@ -/****************************************************************************** - * - * GPL LICENSE SUMMARY - * - * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, - * USA - * - * The full GNU General Public License is included in this distribution - * in the file called LICENSE.GPL. - * - * Contact Information: - * Intel Linux Wireless <ilw@linux.intel.com> - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - *****************************************************************************/ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/etherdevice.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/types.h> -#include <linux/lockdep.h> -#include <linux/pci.h> -#include <linux/dma-mapping.h> -#include <linux/delay.h> -#include <linux/skbuff.h> -#include <net/mac80211.h> - -#include "common.h" - -int -_il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout) -{ - const int interval = 10; /* microseconds */ - int t = 0; - - do { - if ((_il_rd(il, addr) & mask) == (bits & mask)) - return t; - udelay(interval); - t += interval; - } while (t < timeout); - - return -ETIMEDOUT; -} -EXPORT_SYMBOL(_il_poll_bit); - -void -il_set_bit(struct il_priv *p, u32 r, u32 m) -{ - unsigned long reg_flags; - - spin_lock_irqsave(&p->reg_lock, reg_flags); - _il_set_bit(p, r, m); - spin_unlock_irqrestore(&p->reg_lock, reg_flags); -} -EXPORT_SYMBOL(il_set_bit); - -void -il_clear_bit(struct il_priv *p, u32 r, u32 m) -{ - unsigned long reg_flags; - - spin_lock_irqsave(&p->reg_lock, reg_flags); - _il_clear_bit(p, r, m); - spin_unlock_irqrestore(&p->reg_lock, reg_flags); -} -EXPORT_SYMBOL(il_clear_bit); - -bool -_il_grab_nic_access(struct il_priv *il) -{ - int ret; - u32 val; - - /* this bit wakes up the NIC */ - _il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - - /* - * These bits say the device is running, and should keep running for - * at least a short while (at least as long as MAC_ACCESS_REQ stays 1), - * but they do not indicate that embedded SRAM is restored yet; - * 3945 and 4965 have volatile SRAM, and must save/restore contents - * to/from host DRAM when sleeping/waking for power-saving. - * Each direction takes approximately 1/4 millisecond; with this - * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a - * series of register accesses are expected (e.g. reading Event Log), - * to keep device from sleeping. - * - * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that - * SRAM is okay/restored. We don't check that here because this call - * is just for hardware register access; but GP1 MAC_SLEEP check is a - * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log). - * - */ - ret = - _il_poll_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN, - (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY | - CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000); - if (unlikely(ret < 0)) { - val = _il_rd(il, CSR_GP_CNTRL); - WARN_ONCE(1, "Timeout waiting for ucode processor access " - "(CSR_GP_CNTRL 0x%08x)\n", val); - _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI); - return false; - } - - return true; -} -EXPORT_SYMBOL_GPL(_il_grab_nic_access); - -int -il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout) -{ - const int interval = 10; /* microseconds */ - int t = 0; - - do { - if ((il_rd(il, addr) & mask) == mask) - return t; - udelay(interval); - t += interval; - } while (t < timeout); - - return -ETIMEDOUT; -} -EXPORT_SYMBOL(il_poll_bit); - -u32 -il_rd_prph(struct il_priv *il, u32 reg) -{ - unsigned long reg_flags; - u32 val; - - spin_lock_irqsave(&il->reg_lock, reg_flags); - _il_grab_nic_access(il); - val = _il_rd_prph(il, reg); - _il_release_nic_access(il); - spin_unlock_irqrestore(&il->reg_lock, reg_flags); - return val; -} -EXPORT_SYMBOL(il_rd_prph); - -void -il_wr_prph(struct il_priv *il, u32 addr, u32 val) -{ - unsigned long reg_flags; - - spin_lock_irqsave(&il->reg_lock, reg_flags); - if (likely(_il_grab_nic_access(il))) { - _il_wr_prph(il, addr, val); - _il_release_nic_access(il); - } - spin_unlock_irqrestore(&il->reg_lock, reg_flags); -} -EXPORT_SYMBOL(il_wr_prph); - -u32 -il_read_targ_mem(struct il_priv *il, u32 addr) -{ - unsigned long reg_flags; - u32 value; - - spin_lock_irqsave(&il->reg_lock, reg_flags); - _il_grab_nic_access(il); - - _il_wr(il, HBUS_TARG_MEM_RADDR, addr); - value = _il_rd(il, HBUS_TARG_MEM_RDAT); - - _il_release_nic_access(il); - spin_unlock_irqrestore(&il->reg_lock, reg_flags); - return value; -} -EXPORT_SYMBOL(il_read_targ_mem); - -void -il_write_targ_mem(struct il_priv *il, u32 addr, u32 val) -{ - unsigned long reg_flags; - - spin_lock_irqsave(&il->reg_lock, reg_flags); - if (likely(_il_grab_nic_access(il))) { - _il_wr(il, HBUS_TARG_MEM_WADDR, addr); - _il_wr(il, HBUS_TARG_MEM_WDAT, val); - _il_release_nic_access(il); - } - spin_unlock_irqrestore(&il->reg_lock, reg_flags); -} -EXPORT_SYMBOL(il_write_targ_mem); - -const char * -il_get_cmd_string(u8 cmd) -{ - switch (cmd) { - IL_CMD(N_ALIVE); - IL_CMD(N_ERROR); - IL_CMD(C_RXON); - IL_CMD(C_RXON_ASSOC); - IL_CMD(C_QOS_PARAM); - IL_CMD(C_RXON_TIMING); - IL_CMD(C_ADD_STA); - IL_CMD(C_REM_STA); - IL_CMD(C_WEPKEY); - IL_CMD(N_3945_RX); - IL_CMD(C_TX); - IL_CMD(C_RATE_SCALE); - IL_CMD(C_LEDS); - IL_CMD(C_TX_LINK_QUALITY_CMD); - IL_CMD(C_CHANNEL_SWITCH); - IL_CMD(N_CHANNEL_SWITCH); - IL_CMD(C_SPECTRUM_MEASUREMENT); - IL_CMD(N_SPECTRUM_MEASUREMENT); - IL_CMD(C_POWER_TBL); - IL_CMD(N_PM_SLEEP); - IL_CMD(N_PM_DEBUG_STATS); - IL_CMD(C_SCAN); - IL_CMD(C_SCAN_ABORT); - IL_CMD(N_SCAN_START); - IL_CMD(N_SCAN_RESULTS); - IL_CMD(N_SCAN_COMPLETE); - IL_CMD(N_BEACON); - IL_CMD(C_TX_BEACON); - IL_CMD(C_TX_PWR_TBL); - IL_CMD(C_BT_CONFIG); - IL_CMD(C_STATS); - IL_CMD(N_STATS); - IL_CMD(N_CARD_STATE); - IL_CMD(N_MISSED_BEACONS); - IL_CMD(C_CT_KILL_CONFIG); - IL_CMD(C_SENSITIVITY); - IL_CMD(C_PHY_CALIBRATION); - IL_CMD(N_RX_PHY); - IL_CMD(N_RX_MPDU); - IL_CMD(N_RX); - IL_CMD(N_COMPRESSED_BA); - default: - return "UNKNOWN"; - - } -} -EXPORT_SYMBOL(il_get_cmd_string); - -#define HOST_COMPLETE_TIMEOUT (HZ / 2) - -static void -il_generic_cmd_callback(struct il_priv *il, struct il_device_cmd *cmd, - struct il_rx_pkt *pkt) -{ - if (pkt->hdr.flags & IL_CMD_FAILED_MSK) { - IL_ERR("Bad return from %s (0x%08X)\n", - il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); - return; - } -#ifdef CONFIG_IWLEGACY_DEBUG - switch (cmd->hdr.cmd) { - case C_TX_LINK_QUALITY_CMD: - case C_SENSITIVITY: - D_HC_DUMP("back from %s (0x%08X)\n", - il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); - break; - default: - D_HC("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd), - pkt->hdr.flags); - } -#endif -} - -static int -il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd) -{ - int ret; - - BUG_ON(!(cmd->flags & CMD_ASYNC)); - - /* An asynchronous command can not expect an SKB to be set. */ - BUG_ON(cmd->flags & CMD_WANT_SKB); - - /* Assign a generic callback if one is not provided */ - if (!cmd->callback) - cmd->callback = il_generic_cmd_callback; - - if (test_bit(S_EXIT_PENDING, &il->status)) - return -EBUSY; - - ret = il_enqueue_hcmd(il, cmd); - if (ret < 0) { - IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n", - il_get_cmd_string(cmd->id), ret); - return ret; - } - return 0; -} - -int -il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd) -{ - int cmd_idx; - int ret; - - lockdep_assert_held(&il->mutex); - - BUG_ON(cmd->flags & CMD_ASYNC); - - /* A synchronous command can not have a callback set. */ - BUG_ON(cmd->callback); - - D_INFO("Attempting to send sync command %s\n", - il_get_cmd_string(cmd->id)); - - set_bit(S_HCMD_ACTIVE, &il->status); - D_INFO("Setting HCMD_ACTIVE for command %s\n", - il_get_cmd_string(cmd->id)); - - cmd_idx = il_enqueue_hcmd(il, cmd); - if (cmd_idx < 0) { - ret = cmd_idx; - IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n", - il_get_cmd_string(cmd->id), ret); - goto out; - } - - ret = wait_event_timeout(il->wait_command_queue, - !test_bit(S_HCMD_ACTIVE, &il->status), - HOST_COMPLETE_TIMEOUT); - if (!ret) { - if (test_bit(S_HCMD_ACTIVE, &il->status)) { - IL_ERR("Error sending %s: time out after %dms.\n", - il_get_cmd_string(cmd->id), - jiffies_to_msecs(HOST_COMPLETE_TIMEOUT)); - - clear_bit(S_HCMD_ACTIVE, &il->status); - D_INFO("Clearing HCMD_ACTIVE for command %s\n", - il_get_cmd_string(cmd->id)); - ret = -ETIMEDOUT; - goto cancel; - } - } - - if (test_bit(S_RFKILL, &il->status)) { - IL_ERR("Command %s aborted: RF KILL Switch\n", - il_get_cmd_string(cmd->id)); - ret = -ECANCELED; - goto fail; - } - if (test_bit(S_FW_ERROR, &il->status)) { - IL_ERR("Command %s failed: FW Error\n", - il_get_cmd_string(cmd->id)); - ret = -EIO; - goto fail; - } - if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) { - IL_ERR("Error: Response NULL in '%s'\n", - il_get_cmd_string(cmd->id)); - ret = -EIO; - goto cancel; - } - - ret = 0; - goto out; - -cancel: - if (cmd->flags & CMD_WANT_SKB) { - /* - * Cancel the CMD_WANT_SKB flag for the cmd in the - * TX cmd queue. Otherwise in case the cmd comes - * in later, it will possibly set an invalid - * address (cmd->meta.source). - */ - il->txq[il->cmd_queue].meta[cmd_idx].flags &= ~CMD_WANT_SKB; - } -fail: - if (cmd->reply_page) { - il_free_pages(il, cmd->reply_page); - cmd->reply_page = 0; - } -out: - return ret; -} -EXPORT_SYMBOL(il_send_cmd_sync); - -int -il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd) -{ - if (cmd->flags & CMD_ASYNC) - return il_send_cmd_async(il, cmd); - - return il_send_cmd_sync(il, cmd); -} -EXPORT_SYMBOL(il_send_cmd); - -int -il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data) -{ - struct il_host_cmd cmd = { - .id = id, - .len = len, - .data = data, - }; - - return il_send_cmd_sync(il, &cmd); -} -EXPORT_SYMBOL(il_send_cmd_pdu); - -int -il_send_cmd_pdu_async(struct il_priv *il, u8 id, u16 len, const void *data, - void (*callback) (struct il_priv *il, - struct il_device_cmd *cmd, - struct il_rx_pkt *pkt)) -{ - struct il_host_cmd cmd = { - .id = id, - .len = len, - .data = data, - }; - - cmd.flags |= CMD_ASYNC; - cmd.callback = callback; - - return il_send_cmd_async(il, &cmd); -} -EXPORT_SYMBOL(il_send_cmd_pdu_async); - -/* default: IL_LED_BLINK(0) using blinking idx table */ -static int led_mode; -module_param(led_mode, int, S_IRUGO); -MODULE_PARM_DESC(led_mode, - "0=system default, " "1=On(RF On)/Off(RF Off), 2=blinking"); - -/* Throughput OFF time(ms) ON time (ms) - * >300 25 25 - * >200 to 300 40 40 - * >100 to 200 55 55 - * >70 to 100 65 65 - * >50 to 70 75 75 - * >20 to 50 85 85 - * >10 to 20 95 95 - * >5 to 10 110 110 - * >1 to 5 130 130 - * >0 to 1 167 167 - * <=0 SOLID ON - */ -static const struct ieee80211_tpt_blink il_blink[] = { - {.throughput = 0, .blink_time = 334}, - {.throughput = 1 * 1024 - 1, .blink_time = 260}, - {.throughput = 5 * 1024 - 1, .blink_time = 220}, - {.throughput = 10 * 1024 - 1, .blink_time = 190}, - {.throughput = 20 * 1024 - 1, .blink_time = 170}, - {.throughput = 50 * 1024 - 1, .blink_time = 150}, - {.throughput = 70 * 1024 - 1, .blink_time = 130}, - {.throughput = 100 * 1024 - 1, .blink_time = 110}, - {.throughput = 200 * 1024 - 1, .blink_time = 80}, - {.throughput = 300 * 1024 - 1, .blink_time = 50}, -}; - -/* - * Adjust led blink rate to compensate on a MAC Clock difference on every HW - * Led blink rate analysis showed an average deviation of 0% on 3945, - * 5% on 4965 HW. - * Need to compensate on the led on/off time per HW according to the deviation - * to achieve the desired led frequency - * The calculation is: (100-averageDeviation)/100 * blinkTime - * For code efficiency the calculation will be: - * compensation = (100 - averageDeviation) * 64 / 100 - * NewBlinkTime = (compensation * BlinkTime) / 64 - */ -static inline u8 -il_blink_compensation(struct il_priv *il, u8 time, u16 compensation) -{ - if (!compensation) { - IL_ERR("undefined blink compensation: " - "use pre-defined blinking time\n"); - return time; - } - - return (u8) ((time * compensation) >> 6); -} - -/* Set led pattern command */ -static int -il_led_cmd(struct il_priv *il, unsigned long on, unsigned long off) -{ - struct il_led_cmd led_cmd = { - .id = IL_LED_LINK, - .interval = IL_DEF_LED_INTRVL - }; - int ret; - - if (!test_bit(S_READY, &il->status)) - return -EBUSY; - - if (il->blink_on == on && il->blink_off == off) - return 0; - - if (off == 0) { - /* led is SOLID_ON */ - on = IL_LED_SOLID; - } - - D_LED("Led blink time compensation=%u\n", - il->cfg->led_compensation); - led_cmd.on = - il_blink_compensation(il, on, - il->cfg->led_compensation); - led_cmd.off = - il_blink_compensation(il, off, - il->cfg->led_compensation); - - ret = il->ops->send_led_cmd(il, &led_cmd); - if (!ret) { - il->blink_on = on; - il->blink_off = off; - } - return ret; -} - -static void -il_led_brightness_set(struct led_classdev *led_cdev, - enum led_brightness brightness) -{ - struct il_priv *il = container_of(led_cdev, struct il_priv, led); - unsigned long on = 0; - - if (brightness > 0) - on = IL_LED_SOLID; - - il_led_cmd(il, on, 0); -} - -static int -il_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on, - unsigned long *delay_off) -{ - struct il_priv *il = container_of(led_cdev, struct il_priv, led); - - return il_led_cmd(il, *delay_on, *delay_off); -} - -void -il_leds_init(struct il_priv *il) -{ - int mode = led_mode; - int ret; - - if (mode == IL_LED_DEFAULT) - mode = il->cfg->led_mode; - - il->led.name = - kasprintf(GFP_KERNEL, "%s-led", wiphy_name(il->hw->wiphy)); - il->led.brightness_set = il_led_brightness_set; - il->led.blink_set = il_led_blink_set; - il->led.max_brightness = 1; - - switch (mode) { - case IL_LED_DEFAULT: - WARN_ON(1); - break; - case IL_LED_BLINK: - il->led.default_trigger = - ieee80211_create_tpt_led_trigger(il->hw, - IEEE80211_TPT_LEDTRIG_FL_CONNECTED, - il_blink, - ARRAY_SIZE(il_blink)); - break; - case IL_LED_RF_STATE: - il->led.default_trigger = ieee80211_get_radio_led_name(il->hw); - break; - } - - ret = led_classdev_register(&il->pci_dev->dev, &il->led); - if (ret) { - kfree(il->led.name); - return; - } - - il->led_registered = true; -} -EXPORT_SYMBOL(il_leds_init); - -void -il_leds_exit(struct il_priv *il) -{ - if (!il->led_registered) - return; - - led_classdev_unregister(&il->led); - kfree(il->led.name); -} -EXPORT_SYMBOL(il_leds_exit); - -/************************** EEPROM BANDS **************************** - * - * The il_eeprom_band definitions below provide the mapping from the - * EEPROM contents to the specific channel number supported for each - * band. - * - * For example, il_priv->eeprom.band_3_channels[4] from the band_3 - * definition below maps to physical channel 42 in the 5.2GHz spectrum. - * The specific geography and calibration information for that channel - * is contained in the eeprom map itself. - * - * During init, we copy the eeprom information and channel map - * information into il->channel_info_24/52 and il->channel_map_24/52 - * - * channel_map_24/52 provides the idx in the channel_info array for a - * given channel. We have to have two separate maps as there is channel - * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and - * band_2 - * - * A value of 0xff stored in the channel_map indicates that the channel - * is not supported by the hardware at all. - * - * A value of 0xfe in the channel_map indicates that the channel is not - * valid for Tx with the current hardware. This means that - * while the system can tune and receive on a given channel, it may not - * be able to associate or transmit any frames on that - * channel. There is no corresponding channel information for that - * entry. - * - *********************************************************************/ - -/* 2.4 GHz */ -const u8 il_eeprom_band_1[14] = { - 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 -}; - -/* 5.2 GHz bands */ -static const u8 il_eeprom_band_2[] = { /* 4915-5080MHz */ - 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16 -}; - -static const u8 il_eeprom_band_3[] = { /* 5170-5320MHz */ - 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64 -}; - -static const u8 il_eeprom_band_4[] = { /* 5500-5700MHz */ - 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 -}; - -static const u8 il_eeprom_band_5[] = { /* 5725-5825MHz */ - 145, 149, 153, 157, 161, 165 -}; - -static const u8 il_eeprom_band_6[] = { /* 2.4 ht40 channel */ - 1, 2, 3, 4, 5, 6, 7 -}; - -static const u8 il_eeprom_band_7[] = { /* 5.2 ht40 channel */ - 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157 -}; - -/****************************************************************************** - * - * EEPROM related functions - * -******************************************************************************/ - -static int -il_eeprom_verify_signature(struct il_priv *il) -{ - u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK; - int ret = 0; - - D_EEPROM("EEPROM signature=0x%08x\n", gp); - switch (gp) { - case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K: - case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K: - break; - default: - IL_ERR("bad EEPROM signature," "EEPROM_GP=0x%08x\n", gp); - ret = -ENOENT; - break; - } - return ret; -} - -const u8 * -il_eeprom_query_addr(const struct il_priv *il, size_t offset) -{ - BUG_ON(offset >= il->cfg->eeprom_size); - return &il->eeprom[offset]; -} -EXPORT_SYMBOL(il_eeprom_query_addr); - -u16 -il_eeprom_query16(const struct il_priv *il, size_t offset) -{ - if (!il->eeprom) - return 0; - return (u16) il->eeprom[offset] | ((u16) il->eeprom[offset + 1] << 8); -} -EXPORT_SYMBOL(il_eeprom_query16); - -/** - * il_eeprom_init - read EEPROM contents - * - * Load the EEPROM contents from adapter into il->eeprom - * - * NOTE: This routine uses the non-debug IO access functions. - */ -int -il_eeprom_init(struct il_priv *il) -{ - __le16 *e; - u32 gp = _il_rd(il, CSR_EEPROM_GP); - int sz; - int ret; - u16 addr; - - /* allocate eeprom */ - sz = il->cfg->eeprom_size; - D_EEPROM("NVM size = %d\n", sz); - il->eeprom = kzalloc(sz, GFP_KERNEL); - if (!il->eeprom) { - ret = -ENOMEM; - goto alloc_err; - } - e = (__le16 *) il->eeprom; - - il->ops->apm_init(il); - - ret = il_eeprom_verify_signature(il); - if (ret < 0) { - IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp); - ret = -ENOENT; - goto err; - } - - /* Make sure driver (instead of uCode) is allowed to read EEPROM */ - ret = il->ops->eeprom_acquire_semaphore(il); - if (ret < 0) { - IL_ERR("Failed to acquire EEPROM semaphore.\n"); - ret = -ENOENT; - goto err; - } - - /* eeprom is an array of 16bit values */ - for (addr = 0; addr < sz; addr += sizeof(u16)) { - u32 r; - - _il_wr(il, CSR_EEPROM_REG, - CSR_EEPROM_REG_MSK_ADDR & (addr << 1)); - - ret = - _il_poll_bit(il, CSR_EEPROM_REG, - CSR_EEPROM_REG_READ_VALID_MSK, - CSR_EEPROM_REG_READ_VALID_MSK, - IL_EEPROM_ACCESS_TIMEOUT); - if (ret < 0) { - IL_ERR("Time out reading EEPROM[%d]\n", addr); - goto done; - } - r = _il_rd(il, CSR_EEPROM_REG); - e[addr / 2] = cpu_to_le16(r >> 16); - } - - D_EEPROM("NVM Type: %s, version: 0x%x\n", "EEPROM", - il_eeprom_query16(il, EEPROM_VERSION)); - - ret = 0; -done: - il->ops->eeprom_release_semaphore(il); - -err: - if (ret) - il_eeprom_free(il); - /* Reset chip to save power until we load uCode during "up". */ - il_apm_stop(il); -alloc_err: - return ret; -} -EXPORT_SYMBOL(il_eeprom_init); - -void -il_eeprom_free(struct il_priv *il) -{ - kfree(il->eeprom); - il->eeprom = NULL; -} -EXPORT_SYMBOL(il_eeprom_free); - -static void -il_init_band_reference(const struct il_priv *il, int eep_band, - int *eeprom_ch_count, - const struct il_eeprom_channel **eeprom_ch_info, - const u8 **eeprom_ch_idx) -{ - u32 offset = il->cfg->regulatory_bands[eep_band - 1]; - - switch (eep_band) { - case 1: /* 2.4GHz band */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1); - *eeprom_ch_info = - (struct il_eeprom_channel *)il_eeprom_query_addr(il, - offset); - *eeprom_ch_idx = il_eeprom_band_1; - break; - case 2: /* 4.9GHz band */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2); - *eeprom_ch_info = - (struct il_eeprom_channel *)il_eeprom_query_addr(il, - offset); - *eeprom_ch_idx = il_eeprom_band_2; - break; - case 3: /* 5.2GHz band */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3); - *eeprom_ch_info = - (struct il_eeprom_channel *)il_eeprom_query_addr(il, - offset); - *eeprom_ch_idx = il_eeprom_band_3; - break; - case 4: /* 5.5GHz band */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4); - *eeprom_ch_info = - (struct il_eeprom_channel *)il_eeprom_query_addr(il, - offset); - *eeprom_ch_idx = il_eeprom_band_4; - break; - case 5: /* 5.7GHz band */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5); - *eeprom_ch_info = - (struct il_eeprom_channel *)il_eeprom_query_addr(il, - offset); - *eeprom_ch_idx = il_eeprom_band_5; - break; - case 6: /* 2.4GHz ht40 channels */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6); - *eeprom_ch_info = - (struct il_eeprom_channel *)il_eeprom_query_addr(il, - offset); - *eeprom_ch_idx = il_eeprom_band_6; - break; - case 7: /* 5 GHz ht40 channels */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7); - *eeprom_ch_info = - (struct il_eeprom_channel *)il_eeprom_query_addr(il, - offset); - *eeprom_ch_idx = il_eeprom_band_7; - break; - default: - BUG(); - } -} - -#define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \ - ? # x " " : "") -/** - * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il. - * - * Does not set up a command, or touch hardware. - */ -static int -il_mod_ht40_chan_info(struct il_priv *il, enum ieee80211_band band, u16 channel, - const struct il_eeprom_channel *eeprom_ch, - u8 clear_ht40_extension_channel) -{ - struct il_channel_info *ch_info; - - ch_info = - (struct il_channel_info *)il_get_channel_info(il, band, channel); - - if (!il_is_channel_valid(ch_info)) - return -1; - - D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):" - " Ad-Hoc %ssupported\n", ch_info->channel, - il_is_channel_a_band(ch_info) ? "5.2" : "2.4", - CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE), - CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE), - CHECK_AND_PRINT(DFS), eeprom_ch->flags, - eeprom_ch->max_power_avg, - ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) && - !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? "" : "not "); - - ch_info->ht40_eeprom = *eeprom_ch; - ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg; - ch_info->ht40_flags = eeprom_ch->flags; - if (eeprom_ch->flags & EEPROM_CHANNEL_VALID) - ch_info->ht40_extension_channel &= - ~clear_ht40_extension_channel; - - return 0; -} - -#define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \ - ? # x " " : "") - -/** - * il_init_channel_map - Set up driver's info for all possible channels - */ -int -il_init_channel_map(struct il_priv *il) -{ - int eeprom_ch_count = 0; - const u8 *eeprom_ch_idx = NULL; - const struct il_eeprom_channel *eeprom_ch_info = NULL; - int band, ch; - struct il_channel_info *ch_info; - - if (il->channel_count) { - D_EEPROM("Channel map already initialized.\n"); - return 0; - } - - D_EEPROM("Initializing regulatory info from EEPROM\n"); - - il->channel_count = - ARRAY_SIZE(il_eeprom_band_1) + ARRAY_SIZE(il_eeprom_band_2) + - ARRAY_SIZE(il_eeprom_band_3) + ARRAY_SIZE(il_eeprom_band_4) + - ARRAY_SIZE(il_eeprom_band_5); - - D_EEPROM("Parsing data for %d channels.\n", il->channel_count); - - il->channel_info = - kzalloc(sizeof(struct il_channel_info) * il->channel_count, - GFP_KERNEL); - if (!il->channel_info) { - IL_ERR("Could not allocate channel_info\n"); - il->channel_count = 0; - return -ENOMEM; - } - - ch_info = il->channel_info; - - /* Loop through the 5 EEPROM bands adding them in order to the - * channel map we maintain (that contains additional information than - * what just in the EEPROM) */ - for (band = 1; band <= 5; band++) { - - il_init_band_reference(il, band, &eeprom_ch_count, - &eeprom_ch_info, &eeprom_ch_idx); - - /* Loop through each band adding each of the channels */ - for (ch = 0; ch < eeprom_ch_count; ch++) { - ch_info->channel = eeprom_ch_idx[ch]; - ch_info->band = - (band == - 1) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; - - /* permanently store EEPROM's channel regulatory flags - * and max power in channel info database. */ - ch_info->eeprom = eeprom_ch_info[ch]; - - /* Copy the run-time flags so they are there even on - * invalid channels */ - ch_info->flags = eeprom_ch_info[ch].flags; - /* First write that ht40 is not enabled, and then enable - * one by one */ - ch_info->ht40_extension_channel = - IEEE80211_CHAN_NO_HT40; - - if (!(il_is_channel_valid(ch_info))) { - D_EEPROM("Ch. %d Flags %x [%sGHz] - " - "No traffic\n", ch_info->channel, - ch_info->flags, - il_is_channel_a_band(ch_info) ? "5.2" : - "2.4"); - ch_info++; - continue; - } - - /* Initialize regulatory-based run-time data */ - ch_info->max_power_avg = ch_info->curr_txpow = - eeprom_ch_info[ch].max_power_avg; - ch_info->scan_power = eeprom_ch_info[ch].max_power_avg; - ch_info->min_power = 0; - - D_EEPROM("Ch. %d [%sGHz] " "%s%s%s%s%s%s(0x%02x %ddBm):" - " Ad-Hoc %ssupported\n", ch_info->channel, - il_is_channel_a_band(ch_info) ? "5.2" : "2.4", - CHECK_AND_PRINT_I(VALID), - CHECK_AND_PRINT_I(IBSS), - CHECK_AND_PRINT_I(ACTIVE), - CHECK_AND_PRINT_I(RADAR), - CHECK_AND_PRINT_I(WIDE), - CHECK_AND_PRINT_I(DFS), - eeprom_ch_info[ch].flags, - eeprom_ch_info[ch].max_power_avg, - ((eeprom_ch_info[ch]. - flags & EEPROM_CHANNEL_IBSS) && - !(eeprom_ch_info[ch]. - flags & EEPROM_CHANNEL_RADAR)) ? "" : - "not "); - - ch_info++; - } - } - - /* Check if we do have HT40 channels */ - if (il->cfg->regulatory_bands[5] == EEPROM_REGULATORY_BAND_NO_HT40 && - il->cfg->regulatory_bands[6] == EEPROM_REGULATORY_BAND_NO_HT40) - return 0; - - /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */ - for (band = 6; band <= 7; band++) { - enum ieee80211_band ieeeband; - - il_init_band_reference(il, band, &eeprom_ch_count, - &eeprom_ch_info, &eeprom_ch_idx); - - /* EEPROM band 6 is 2.4, band 7 is 5 GHz */ - ieeeband = - (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; - - /* Loop through each band adding each of the channels */ - for (ch = 0; ch < eeprom_ch_count; ch++) { - /* Set up driver's info for lower half */ - il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch], - &eeprom_ch_info[ch], - IEEE80211_CHAN_NO_HT40PLUS); - - /* Set up driver's info for upper half */ - il_mod_ht40_chan_info(il, ieeeband, - eeprom_ch_idx[ch] + 4, - &eeprom_ch_info[ch], - IEEE80211_CHAN_NO_HT40MINUS); - } - } - - return 0; -} -EXPORT_SYMBOL(il_init_channel_map); - -/* - * il_free_channel_map - undo allocations in il_init_channel_map - */ -void -il_free_channel_map(struct il_priv *il) -{ - kfree(il->channel_info); - il->channel_count = 0; -} -EXPORT_SYMBOL(il_free_channel_map); - -/** - * il_get_channel_info - Find driver's ilate channel info - * - * Based on band and channel number. - */ -const struct il_channel_info * -il_get_channel_info(const struct il_priv *il, enum ieee80211_band band, - u16 channel) -{ - int i; - - switch (band) { - case IEEE80211_BAND_5GHZ: - for (i = 14; i < il->channel_count; i++) { - if (il->channel_info[i].channel == channel) - return &il->channel_info[i]; - } - break; - case IEEE80211_BAND_2GHZ: - if (channel >= 1 && channel <= 14) - return &il->channel_info[channel - 1]; - break; - default: - BUG(); - } - - return NULL; -} -EXPORT_SYMBOL(il_get_channel_info); - -/* - * Setting power level allows the card to go to sleep when not busy. - * - * We calculate a sleep command based on the required latency, which - * we get from mac80211. - */ - -#define SLP_VEC(X0, X1, X2, X3, X4) { \ - cpu_to_le32(X0), \ - cpu_to_le32(X1), \ - cpu_to_le32(X2), \ - cpu_to_le32(X3), \ - cpu_to_le32(X4) \ -} - -static void -il_build_powertable_cmd(struct il_priv *il, struct il_powertable_cmd *cmd) -{ - const __le32 interval[3][IL_POWER_VEC_SIZE] = { - SLP_VEC(2, 2, 4, 6, 0xFF), - SLP_VEC(2, 4, 7, 10, 10), - SLP_VEC(4, 7, 10, 10, 0xFF) - }; - int i, dtim_period, no_dtim; - u32 max_sleep; - bool skip; - - memset(cmd, 0, sizeof(*cmd)); - - if (il->power_data.pci_pm) - cmd->flags |= IL_POWER_PCI_PM_MSK; - - /* if no Power Save, we are done */ - if (il->power_data.ps_disabled) - return; - - cmd->flags = IL_POWER_DRIVER_ALLOW_SLEEP_MSK; - cmd->keep_alive_seconds = 0; - cmd->debug_flags = 0; - cmd->rx_data_timeout = cpu_to_le32(25 * 1024); - cmd->tx_data_timeout = cpu_to_le32(25 * 1024); - cmd->keep_alive_beacons = 0; - - dtim_period = il->vif ? il->vif->bss_conf.dtim_period : 0; - - if (dtim_period <= 2) { - memcpy(cmd->sleep_interval, interval[0], sizeof(interval[0])); - no_dtim = 2; - } else if (dtim_period <= 10) { - memcpy(cmd->sleep_interval, interval[1], sizeof(interval[1])); - no_dtim = 2; - } else { - memcpy(cmd->sleep_interval, interval[2], sizeof(interval[2])); - no_dtim = 0; - } - - if (dtim_period == 0) { - dtim_period = 1; - skip = false; - } else { - skip = !!no_dtim; - } - - if (skip) { - __le32 tmp = cmd->sleep_interval[IL_POWER_VEC_SIZE - 1]; - - max_sleep = le32_to_cpu(tmp); - if (max_sleep == 0xFF) - max_sleep = dtim_period * (skip + 1); - else if (max_sleep > dtim_period) - max_sleep = (max_sleep / dtim_period) * dtim_period; - cmd->flags |= IL_POWER_SLEEP_OVER_DTIM_MSK; - } else { - max_sleep = dtim_period; - cmd->flags &= ~IL_POWER_SLEEP_OVER_DTIM_MSK; - } - - for (i = 0; i < IL_POWER_VEC_SIZE; i++) - if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep) - cmd->sleep_interval[i] = cpu_to_le32(max_sleep); -} - -static int -il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd) -{ - D_POWER("Sending power/sleep command\n"); - D_POWER("Flags value = 0x%08X\n", cmd->flags); - D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout)); - D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout)); - D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n", - le32_to_cpu(cmd->sleep_interval[0]), - le32_to_cpu(cmd->sleep_interval[1]), - le32_to_cpu(cmd->sleep_interval[2]), - le32_to_cpu(cmd->sleep_interval[3]), - le32_to_cpu(cmd->sleep_interval[4])); - - return il_send_cmd_pdu(il, C_POWER_TBL, - sizeof(struct il_powertable_cmd), cmd); -} - -static int -il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force) -{ - int ret; - bool update_chains; - - lockdep_assert_held(&il->mutex); - - /* Don't update the RX chain when chain noise calibration is running */ - update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE || - il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE; - - if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force) - return 0; - - if (!il_is_ready_rf(il)) - return -EIO; - - /* scan complete use sleep_power_next, need to be updated */ - memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd)); - if (test_bit(S_SCANNING, &il->status) && !force) { - D_INFO("Defer power set mode while scanning\n"); - return 0; - } - - if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK) - set_bit(S_POWER_PMI, &il->status); - - ret = il_set_power(il, cmd); - if (!ret) { - if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)) - clear_bit(S_POWER_PMI, &il->status); - - if (il->ops->update_chain_flags && update_chains) - il->ops->update_chain_flags(il); - else if (il->ops->update_chain_flags) - D_POWER("Cannot update the power, chain noise " - "calibration running: %d\n", - il->chain_noise_data.state); - - memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)); - } else - IL_ERR("set power fail, ret = %d", ret); - - return ret; -} - -int -il_power_update_mode(struct il_priv *il, bool force) -{ - struct il_powertable_cmd cmd; - - il_build_powertable_cmd(il, &cmd); - - return il_power_set_mode(il, &cmd, force); -} -EXPORT_SYMBOL(il_power_update_mode); - -/* initialize to default */ -void -il_power_initialize(struct il_priv *il) -{ - u16 lctl; - - pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl); - il->power_data.pci_pm = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S); - - il->power_data.debug_sleep_level_override = -1; - - memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd)); -} -EXPORT_SYMBOL(il_power_initialize); - -/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after - * sending probe req. This should be set long enough to hear probe responses - * from more than one AP. */ -#define IL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */ -#define IL_ACTIVE_DWELL_TIME_52 (20) - -#define IL_ACTIVE_DWELL_FACTOR_24GHZ (3) -#define IL_ACTIVE_DWELL_FACTOR_52GHZ (2) - -/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel. - * Must be set longer than active dwell time. - * For the most reliable scan, set > AP beacon interval (typically 100msec). */ -#define IL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */ -#define IL_PASSIVE_DWELL_TIME_52 (10) -#define IL_PASSIVE_DWELL_BASE (100) -#define IL_CHANNEL_TUNE_TIME 5 - -static int -il_send_scan_abort(struct il_priv *il) -{ - int ret; - struct il_rx_pkt *pkt; - struct il_host_cmd cmd = { - .id = C_SCAN_ABORT, - .flags = CMD_WANT_SKB, - }; - - /* Exit instantly with error when device is not ready - * to receive scan abort command or it does not perform - * hardware scan currently */ - if (!test_bit(S_READY, &il->status) || - !test_bit(S_GEO_CONFIGURED, &il->status) || - !test_bit(S_SCAN_HW, &il->status) || - test_bit(S_FW_ERROR, &il->status) || - test_bit(S_EXIT_PENDING, &il->status)) - return -EIO; - - ret = il_send_cmd_sync(il, &cmd); - if (ret) - return ret; - - pkt = (struct il_rx_pkt *)cmd.reply_page; - if (pkt->u.status != CAN_ABORT_STATUS) { - /* The scan abort will return 1 for success or - * 2 for "failure". A failure condition can be - * due to simply not being in an active scan which - * can occur if we send the scan abort before we - * the microcode has notified us that a scan is - * completed. */ - D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status); - ret = -EIO; - } - - il_free_pages(il, cmd.reply_page); - return ret; -} - -static void -il_complete_scan(struct il_priv *il, bool aborted) -{ - /* check if scan was requested from mac80211 */ - if (il->scan_request) { - D_SCAN("Complete scan in mac80211\n"); - ieee80211_scan_completed(il->hw, aborted); - } - - il->scan_vif = NULL; - il->scan_request = NULL; -} - -void -il_force_scan_end(struct il_priv *il) -{ - lockdep_assert_held(&il->mutex); - - if (!test_bit(S_SCANNING, &il->status)) { - D_SCAN("Forcing scan end while not scanning\n"); - return; - } - - D_SCAN("Forcing scan end\n"); - clear_bit(S_SCANNING, &il->status); - clear_bit(S_SCAN_HW, &il->status); - clear_bit(S_SCAN_ABORTING, &il->status); - il_complete_scan(il, true); -} - -static void -il_do_scan_abort(struct il_priv *il) -{ - int ret; - - lockdep_assert_held(&il->mutex); - - if (!test_bit(S_SCANNING, &il->status)) { - D_SCAN("Not performing scan to abort\n"); - return; - } - - if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) { - D_SCAN("Scan abort in progress\n"); - return; - } - - ret = il_send_scan_abort(il); - if (ret) { - D_SCAN("Send scan abort failed %d\n", ret); - il_force_scan_end(il); - } else - D_SCAN("Successfully send scan abort\n"); -} - -/** - * il_scan_cancel - Cancel any currently executing HW scan - */ -int -il_scan_cancel(struct il_priv *il) -{ - D_SCAN("Queuing abort scan\n"); - queue_work(il->workqueue, &il->abort_scan); - return 0; -} -EXPORT_SYMBOL(il_scan_cancel); - -/** - * il_scan_cancel_timeout - Cancel any currently executing HW scan - * @ms: amount of time to wait (in milliseconds) for scan to abort - * - */ -int -il_scan_cancel_timeout(struct il_priv *il, unsigned long ms) -{ - unsigned long timeout = jiffies + msecs_to_jiffies(ms); - - lockdep_assert_held(&il->mutex); - - D_SCAN("Scan cancel timeout\n"); - - il_do_scan_abort(il); - - while (time_before_eq(jiffies, timeout)) { - if (!test_bit(S_SCAN_HW, &il->status)) - break; - msleep(20); - } - - return test_bit(S_SCAN_HW, &il->status); -} -EXPORT_SYMBOL(il_scan_cancel_timeout); - -/* Service response to C_SCAN (0x80) */ -static void -il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb) -{ -#ifdef CONFIG_IWLEGACY_DEBUG - struct il_rx_pkt *pkt = rxb_addr(rxb); - struct il_scanreq_notification *notif = - (struct il_scanreq_notification *)pkt->u.raw; - - D_SCAN("Scan request status = 0x%x\n", notif->status); -#endif -} - -/* Service N_SCAN_START (0x82) */ -static void -il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb) -{ - struct il_rx_pkt *pkt = rxb_addr(rxb); - struct il_scanstart_notification *notif = - (struct il_scanstart_notification *)pkt->u.raw; - il->scan_start_tsf = le32_to_cpu(notif->tsf_low); - D_SCAN("Scan start: " "%d [802.11%s] " - "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel, - notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high), - le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer); -} - -/* Service N_SCAN_RESULTS (0x83) */ -static void -il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb) -{ -#ifdef CONFIG_IWLEGACY_DEBUG - struct il_rx_pkt *pkt = rxb_addr(rxb); - struct il_scanresults_notification *notif = - (struct il_scanresults_notification *)pkt->u.raw; - - D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d " - "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a", - le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low), - le32_to_cpu(notif->stats[0]), - le32_to_cpu(notif->tsf_low) - il->scan_start_tsf); -#endif -} - -/* Service N_SCAN_COMPLETE (0x84) */ -static void -il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb) -{ - -#ifdef CONFIG_IWLEGACY_DEBUG - struct il_rx_pkt *pkt = rxb_addr(rxb); - struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw; -#endif - - D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n", - scan_notif->scanned_channels, scan_notif->tsf_low, - scan_notif->tsf_high, scan_notif->status); - - /* The HW is no longer scanning */ - clear_bit(S_SCAN_HW, &il->status); - - D_SCAN("Scan on %sGHz took %dms\n", - (il->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2", - jiffies_to_msecs(jiffies - il->scan_start)); - - queue_work(il->workqueue, &il->scan_completed); -} - -void -il_setup_rx_scan_handlers(struct il_priv *il) -{ - /* scan handlers */ - il->handlers[C_SCAN] = il_hdl_scan; - il->handlers[N_SCAN_START] = il_hdl_scan_start; - il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results; - il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete; -} -EXPORT_SYMBOL(il_setup_rx_scan_handlers); - -u16 -il_get_active_dwell_time(struct il_priv *il, enum ieee80211_band band, - u8 n_probes) -{ - if (band == IEEE80211_BAND_5GHZ) - return IL_ACTIVE_DWELL_TIME_52 + - IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1); - else - return IL_ACTIVE_DWELL_TIME_24 + - IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1); -} -EXPORT_SYMBOL(il_get_active_dwell_time); - -u16 -il_get_passive_dwell_time(struct il_priv *il, enum ieee80211_band band, - struct ieee80211_vif *vif) -{ - u16 value; - - u16 passive = - (band == - IEEE80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE + - IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE + - IL_PASSIVE_DWELL_TIME_52; - - if (il_is_any_associated(il)) { - /* - * If we're associated, we clamp the maximum passive - * dwell time to be 98% of the smallest beacon interval - * (minus 2 * channel tune time) - */ - value = il->vif ? il->vif->bss_conf.beacon_int : 0; - if (value > IL_PASSIVE_DWELL_BASE || !value) - value = IL_PASSIVE_DWELL_BASE; - value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2; - passive = min(value, passive); - } - - return passive; -} -EXPORT_SYMBOL(il_get_passive_dwell_time); - -void -il_init_scan_params(struct il_priv *il) -{ - u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1; - if (!il->scan_tx_ant[IEEE80211_BAND_5GHZ]) - il->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx; - if (!il->scan_tx_ant[IEEE80211_BAND_2GHZ]) - il->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx; -} -EXPORT_SYMBOL(il_init_scan_params); - -static int -il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif) -{ - int ret; - - lockdep_assert_held(&il->mutex); - - cancel_delayed_work(&il->scan_check); - - if (!il_is_ready_rf(il)) { - IL_WARN("Request scan called when driver not ready.\n"); - return -EIO; - } - - if (test_bit(S_SCAN_HW, &il->status)) { - D_SCAN("Multiple concurrent scan requests in parallel.\n"); - return -EBUSY; - } - - if (test_bit(S_SCAN_ABORTING, &il->status)) { - D_SCAN("Scan request while abort pending.\n"); - return -EBUSY; - } - - D_SCAN("Starting scan...\n"); - - set_bit(S_SCANNING, &il->status); - il->scan_start = jiffies; - - ret = il->ops->request_scan(il, vif); - if (ret) { - clear_bit(S_SCANNING, &il->status); - return ret; - } - - queue_delayed_work(il->workqueue, &il->scan_check, - IL_SCAN_CHECK_WATCHDOG); - - return 0; -} - -int -il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif, - struct ieee80211_scan_request *hw_req) -{ - struct cfg80211_scan_request *req = &hw_req->req; - struct il_priv *il = hw->priv; - int ret; - - if (req->n_channels == 0) { - IL_ERR("Can not scan on no channels.\n"); - return -EINVAL; - } - - mutex_lock(&il->mutex); - D_MAC80211("enter\n"); - - if (test_bit(S_SCANNING, &il->status)) { - D_SCAN("Scan already in progress.\n"); - ret = -EAGAIN; - goto out_unlock; - } - - /* mac80211 will only ask for one band at a time */ - il->scan_request = req; - il->scan_vif = vif; - il->scan_band = req->channels[0]->band; - - ret = il_scan_initiate(il, vif); - -out_unlock: - D_MAC80211("leave ret %d\n", ret); - mutex_unlock(&il->mutex); - - return ret; -} -EXPORT_SYMBOL(il_mac_hw_scan); - -static void -il_bg_scan_check(struct work_struct *data) -{ - struct il_priv *il = - container_of(data, struct il_priv, scan_check.work); - - D_SCAN("Scan check work\n"); - - /* Since we are here firmware does not finish scan and - * most likely is in bad shape, so we don't bother to - * send abort command, just force scan complete to mac80211 */ - mutex_lock(&il->mutex); - il_force_scan_end(il); - mutex_unlock(&il->mutex); -} - -/** - * il_fill_probe_req - fill in all required fields and IE for probe request - */ - -u16 -il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame, - const u8 *ta, const u8 *ies, int ie_len, int left) -{ - int len = 0; - u8 *pos = NULL; - - /* Make sure there is enough space for the probe request, - * two mandatory IEs and the data */ - left -= 24; - if (left < 0) - return 0; - - frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); - eth_broadcast_addr(frame->da); - memcpy(frame->sa, ta, ETH_ALEN); - eth_broadcast_addr(frame->bssid); - frame->seq_ctrl = 0; - - len += 24; - - /* ...next IE... */ - pos = &frame->u.probe_req.variable[0]; - - /* fill in our indirect SSID IE */ - left -= 2; - if (left < 0) - return 0; - *pos++ = WLAN_EID_SSID; - *pos++ = 0; - - len += 2; - - if (WARN_ON(left < ie_len)) - return len; - - if (ies && ie_len) { - memcpy(pos, ies, ie_len); - len += ie_len; - } - - return (u16) len; -} -EXPORT_SYMBOL(il_fill_probe_req); - -static void -il_bg_abort_scan(struct work_struct *work) -{ - struct il_priv *il = container_of(work, struct il_priv, abort_scan); - - D_SCAN("Abort scan work\n"); - - /* We keep scan_check work queued in case when firmware will not - * report back scan completed notification */ - mutex_lock(&il->mutex); - il_scan_cancel_timeout(il, 200); - mutex_unlock(&il->mutex); -} - -static void -il_bg_scan_completed(struct work_struct *work) -{ - struct il_priv *il = container_of(work, struct il_priv, scan_completed); - bool aborted; - - D_SCAN("Completed scan.\n"); - - cancel_delayed_work(&il->scan_check); - - mutex_lock(&il->mutex); - - aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status); - if (aborted) - D_SCAN("Aborted scan completed.\n"); - - if (!test_and_clear_bit(S_SCANNING, &il->status)) { - D_SCAN("Scan already completed.\n"); - goto out_settings; - } - - il_complete_scan(il, aborted); - -out_settings: - /* Can we still talk to firmware ? */ - if (!il_is_ready_rf(il)) - goto out; - - /* - * We do not commit power settings while scan is pending, - * do it now if the settings changed. - */ - il_power_set_mode(il, &il->power_data.sleep_cmd_next, false); - il_set_tx_power(il, il->tx_power_next, false); - - il->ops->post_scan(il); - -out: - mutex_unlock(&il->mutex); -} - -void -il_setup_scan_deferred_work(struct il_priv *il) -{ - INIT_WORK(&il->scan_completed, il_bg_scan_completed); - INIT_WORK(&il->abort_scan, il_bg_abort_scan); - INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check); -} -EXPORT_SYMBOL(il_setup_scan_deferred_work); - -void -il_cancel_scan_deferred_work(struct il_priv *il) -{ - cancel_work_sync(&il->abort_scan); - cancel_work_sync(&il->scan_completed); - - if (cancel_delayed_work_sync(&il->scan_check)) { - mutex_lock(&il->mutex); - il_force_scan_end(il); - mutex_unlock(&il->mutex); - } -} -EXPORT_SYMBOL(il_cancel_scan_deferred_work); - -/* il->sta_lock must be held */ -static void -il_sta_ucode_activate(struct il_priv *il, u8 sta_id) -{ - - if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) - IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n", - sta_id, il->stations[sta_id].sta.sta.addr); - - if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) { - D_ASSOC("STA id %u addr %pM already present" - " in uCode (according to driver)\n", sta_id, - il->stations[sta_id].sta.sta.addr); - } else { - il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE; - D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id, - il->stations[sta_id].sta.sta.addr); - } -} - -static int -il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta, - struct il_rx_pkt *pkt, bool sync) -{ - u8 sta_id = addsta->sta.sta_id; - unsigned long flags; - int ret = -EIO; - - if (pkt->hdr.flags & IL_CMD_FAILED_MSK) { - IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags); - return ret; - } - - D_INFO("Processing response for adding station %u\n", sta_id); - - spin_lock_irqsave(&il->sta_lock, flags); - - switch (pkt->u.add_sta.status) { - case ADD_STA_SUCCESS_MSK: - D_INFO("C_ADD_STA PASSED\n"); - il_sta_ucode_activate(il, sta_id); - ret = 0; - break; - case ADD_STA_NO_ROOM_IN_TBL: - IL_ERR("Adding station %d failed, no room in table.\n", sta_id); - break; - case ADD_STA_NO_BLOCK_ACK_RESOURCE: - IL_ERR("Adding station %d failed, no block ack resource.\n", - sta_id); - break; - case ADD_STA_MODIFY_NON_EXIST_STA: - IL_ERR("Attempting to modify non-existing station %d\n", - sta_id); - break; - default: - D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status); - break; - } - - D_INFO("%s station id %u addr %pM\n", - il->stations[sta_id].sta.mode == - STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id, - il->stations[sta_id].sta.sta.addr); - - /* - * XXX: The MAC address in the command buffer is often changed from - * the original sent to the device. That is, the MAC address - * written to the command buffer often is not the same MAC address - * read from the command buffer when the command returns. This - * issue has not yet been resolved and this debugging is left to - * observe the problem. - */ - D_INFO("%s station according to cmd buffer %pM\n", - il->stations[sta_id].sta.mode == - STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr); - spin_unlock_irqrestore(&il->sta_lock, flags); - - return ret; -} - -static void -il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd, - struct il_rx_pkt *pkt) -{ - struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload; - - il_process_add_sta_resp(il, addsta, pkt, false); - -} - -int -il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags) -{ - struct il_rx_pkt *pkt = NULL; - int ret = 0; - u8 data[sizeof(*sta)]; - struct il_host_cmd cmd = { - .id = C_ADD_STA, - .flags = flags, - .data = data, - }; - u8 sta_id __maybe_unused = sta->sta.sta_id; - - D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr, - flags & CMD_ASYNC ? "a" : ""); - - if (flags & CMD_ASYNC) - cmd.callback = il_add_sta_callback; - else { - cmd.flags |= CMD_WANT_SKB; - might_sleep(); - } - - cmd.len = il->ops->build_addsta_hcmd(sta, data); - ret = il_send_cmd(il, &cmd); - - if (ret || (flags & CMD_ASYNC)) - return ret; - - if (ret == 0) { - pkt = (struct il_rx_pkt *)cmd.reply_page; - ret = il_process_add_sta_resp(il, sta, pkt, true); - } - il_free_pages(il, cmd.reply_page); - - return ret; -} -EXPORT_SYMBOL(il_send_add_sta); - -static void -il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta) -{ - struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap; - __le32 sta_flags; - - if (!sta || !sta_ht_inf->ht_supported) - goto done; - - D_ASSOC("spatial multiplexing power save mode: %s\n", - (sta->smps_mode == IEEE80211_SMPS_STATIC) ? "static" : - (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" : - "disabled"); - - sta_flags = il->stations[idx].sta.station_flags; - - sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK); - - switch (sta->smps_mode) { - case IEEE80211_SMPS_STATIC: - sta_flags |= STA_FLG_MIMO_DIS_MSK; - break; - case IEEE80211_SMPS_DYNAMIC: - sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK; - break; - case IEEE80211_SMPS_OFF: - break; - default: - IL_WARN("Invalid MIMO PS mode %d\n", sta->smps_mode); - break; - } - - sta_flags |= - cpu_to_le32((u32) sta_ht_inf-> - ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); - - sta_flags |= - cpu_to_le32((u32) sta_ht_inf-> - ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS); - - if (il_is_ht40_tx_allowed(il, &sta->ht_cap)) - sta_flags |= STA_FLG_HT40_EN_MSK; - else - sta_flags &= ~STA_FLG_HT40_EN_MSK; - - il->stations[idx].sta.station_flags = sta_flags; -done: - return; -} - -/** - * il_prep_station - Prepare station information for addition - * - * should be called with sta_lock held - */ -u8 -il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap, - struct ieee80211_sta *sta) -{ - struct il_station_entry *station; - int i; - u8 sta_id = IL_INVALID_STATION; - u16 rate; - - if (is_ap) - sta_id = IL_AP_ID; - else if (is_broadcast_ether_addr(addr)) - sta_id = il->hw_params.bcast_id; - else - for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) { - if (ether_addr_equal(il->stations[i].sta.sta.addr, - addr)) { - sta_id = i; - break; - } - - if (!il->stations[i].used && - sta_id == IL_INVALID_STATION) - sta_id = i; - } - - /* - * These two conditions have the same outcome, but keep them - * separate - */ - if (unlikely(sta_id == IL_INVALID_STATION)) - return sta_id; - - /* - * uCode is not able to deal with multiple requests to add a - * station. Keep track if one is in progress so that we do not send - * another. - */ - if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) { - D_INFO("STA %d already in process of being added.\n", sta_id); - return sta_id; - } - - if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) && - (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) && - ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) { - D_ASSOC("STA %d (%pM) already added, not adding again.\n", - sta_id, addr); - return sta_id; - } - - station = &il->stations[sta_id]; - station->used = IL_STA_DRIVER_ACTIVE; - D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr); - il->num_stations++; - - /* Set up the C_ADD_STA command to send to device */ - memset(&station->sta, 0, sizeof(struct il_addsta_cmd)); - memcpy(station->sta.sta.addr, addr, ETH_ALEN); - station->sta.mode = 0; - station->sta.sta.sta_id = sta_id; - station->sta.station_flags = 0; - - /* - * OK to call unconditionally, since local stations (IBSS BSSID - * STA and broadcast STA) pass in a NULL sta, and mac80211 - * doesn't allow HT IBSS. - */ - il_set_ht_add_station(il, sta_id, sta); - - /* 3945 only */ - rate = (il->band == IEEE80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP; - /* Turn on both antennas for the station... */ - station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK); - - return sta_id; - -} -EXPORT_SYMBOL_GPL(il_prep_station); - -#define STA_WAIT_TIMEOUT (HZ/2) - -/** - * il_add_station_common - - */ -int -il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap, - struct ieee80211_sta *sta, u8 *sta_id_r) -{ - unsigned long flags_spin; - int ret = 0; - u8 sta_id; - struct il_addsta_cmd sta_cmd; - - *sta_id_r = 0; - spin_lock_irqsave(&il->sta_lock, flags_spin); - sta_id = il_prep_station(il, addr, is_ap, sta); - if (sta_id == IL_INVALID_STATION) { - IL_ERR("Unable to prepare station %pM for addition\n", addr); - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - return -EINVAL; - } - - /* - * uCode is not able to deal with multiple requests to add a - * station. Keep track if one is in progress so that we do not send - * another. - */ - if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) { - D_INFO("STA %d already in process of being added.\n", sta_id); - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - return -EEXIST; - } - - if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) && - (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) { - D_ASSOC("STA %d (%pM) already added, not adding again.\n", - sta_id, addr); - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - return -EEXIST; - } - - il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS; - memcpy(&sta_cmd, &il->stations[sta_id].sta, - sizeof(struct il_addsta_cmd)); - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - - /* Add station to device's station table */ - ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC); - if (ret) { - spin_lock_irqsave(&il->sta_lock, flags_spin); - IL_ERR("Adding station %pM failed.\n", - il->stations[sta_id].sta.sta.addr); - il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE; - il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS; - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - } - *sta_id_r = sta_id; - return ret; -} -EXPORT_SYMBOL(il_add_station_common); - -/** - * il_sta_ucode_deactivate - deactivate ucode status for a station - * - * il->sta_lock must be held - */ -static void -il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id) -{ - /* Ucode must be active and driver must be non active */ - if ((il->stations[sta_id]. - used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) != - IL_STA_UCODE_ACTIVE) - IL_ERR("removed non active STA %u\n", sta_id); - - il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE; - - memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry)); - D_ASSOC("Removed STA %u\n", sta_id); -} - -static int -il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id, - bool temporary) -{ - struct il_rx_pkt *pkt; - int ret; - - unsigned long flags_spin; - struct il_rem_sta_cmd rm_sta_cmd; - - struct il_host_cmd cmd = { - .id = C_REM_STA, - .len = sizeof(struct il_rem_sta_cmd), - .flags = CMD_SYNC, - .data = &rm_sta_cmd, - }; - - memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd)); - rm_sta_cmd.num_sta = 1; - memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN); - - cmd.flags |= CMD_WANT_SKB; - - ret = il_send_cmd(il, &cmd); - - if (ret) - return ret; - - pkt = (struct il_rx_pkt *)cmd.reply_page; - if (pkt->hdr.flags & IL_CMD_FAILED_MSK) { - IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags); - ret = -EIO; - } - - if (!ret) { - switch (pkt->u.rem_sta.status) { - case REM_STA_SUCCESS_MSK: - if (!temporary) { - spin_lock_irqsave(&il->sta_lock, flags_spin); - il_sta_ucode_deactivate(il, sta_id); - spin_unlock_irqrestore(&il->sta_lock, - flags_spin); - } - D_ASSOC("C_REM_STA PASSED\n"); - break; - default: - ret = -EIO; - IL_ERR("C_REM_STA failed\n"); - break; - } - } - il_free_pages(il, cmd.reply_page); - - return ret; -} - -/** - * il_remove_station - Remove driver's knowledge of station. - */ -int -il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr) -{ - unsigned long flags; - - if (!il_is_ready(il)) { - D_INFO("Unable to remove station %pM, device not ready.\n", - addr); - /* - * It is typical for stations to be removed when we are - * going down. Return success since device will be down - * soon anyway - */ - return 0; - } - - D_ASSOC("Removing STA from driver:%d %pM\n", sta_id, addr); - - if (WARN_ON(sta_id == IL_INVALID_STATION)) - return -EINVAL; - - spin_lock_irqsave(&il->sta_lock, flags); - - if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) { - D_INFO("Removing %pM but non DRIVER active\n", addr); - goto out_err; - } - - if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) { - D_INFO("Removing %pM but non UCODE active\n", addr); - goto out_err; - } - - if (il->stations[sta_id].used & IL_STA_LOCAL) { - kfree(il->stations[sta_id].lq); - il->stations[sta_id].lq = NULL; - } - - il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE; - - il->num_stations--; - - BUG_ON(il->num_stations < 0); - - spin_unlock_irqrestore(&il->sta_lock, flags); - - return il_send_remove_station(il, addr, sta_id, false); -out_err: - spin_unlock_irqrestore(&il->sta_lock, flags); - return -EINVAL; -} -EXPORT_SYMBOL_GPL(il_remove_station); - -/** - * il_clear_ucode_stations - clear ucode station table bits - * - * This function clears all the bits in the driver indicating - * which stations are active in the ucode. Call when something - * other than explicit station management would cause this in - * the ucode, e.g. unassociated RXON. - */ -void -il_clear_ucode_stations(struct il_priv *il) -{ - int i; - unsigned long flags_spin; - bool cleared = false; - - D_INFO("Clearing ucode stations in driver\n"); - - spin_lock_irqsave(&il->sta_lock, flags_spin); - for (i = 0; i < il->hw_params.max_stations; i++) { - if (il->stations[i].used & IL_STA_UCODE_ACTIVE) { - D_INFO("Clearing ucode active for station %d\n", i); - il->stations[i].used &= ~IL_STA_UCODE_ACTIVE; - cleared = true; - } - } - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - - if (!cleared) - D_INFO("No active stations found to be cleared\n"); -} -EXPORT_SYMBOL(il_clear_ucode_stations); - -/** - * il_restore_stations() - Restore driver known stations to device - * - * All stations considered active by driver, but not present in ucode, is - * restored. - * - * Function sleeps. - */ -void -il_restore_stations(struct il_priv *il) -{ - struct il_addsta_cmd sta_cmd; - struct il_link_quality_cmd lq; - unsigned long flags_spin; - int i; - bool found = false; - int ret; - bool send_lq; - - if (!il_is_ready(il)) { - D_INFO("Not ready yet, not restoring any stations.\n"); - return; - } - - D_ASSOC("Restoring all known stations ... start.\n"); - spin_lock_irqsave(&il->sta_lock, flags_spin); - for (i = 0; i < il->hw_params.max_stations; i++) { - if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) && - !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) { - D_ASSOC("Restoring sta %pM\n", - il->stations[i].sta.sta.addr); - il->stations[i].sta.mode = 0; - il->stations[i].used |= IL_STA_UCODE_INPROGRESS; - found = true; - } - } - - for (i = 0; i < il->hw_params.max_stations; i++) { - if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) { - memcpy(&sta_cmd, &il->stations[i].sta, - sizeof(struct il_addsta_cmd)); - send_lq = false; - if (il->stations[i].lq) { - memcpy(&lq, il->stations[i].lq, - sizeof(struct il_link_quality_cmd)); - send_lq = true; - } - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC); - if (ret) { - spin_lock_irqsave(&il->sta_lock, flags_spin); - IL_ERR("Adding station %pM failed.\n", - il->stations[i].sta.sta.addr); - il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE; - il->stations[i].used &= - ~IL_STA_UCODE_INPROGRESS; - spin_unlock_irqrestore(&il->sta_lock, - flags_spin); - } - /* - * Rate scaling has already been initialized, send - * current LQ command - */ - if (send_lq) - il_send_lq_cmd(il, &lq, CMD_SYNC, true); - spin_lock_irqsave(&il->sta_lock, flags_spin); - il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS; - } - } - - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - if (!found) - D_INFO("Restoring all known stations" - " .... no stations to be restored.\n"); - else - D_INFO("Restoring all known stations" " .... complete.\n"); -} -EXPORT_SYMBOL(il_restore_stations); - -int -il_get_free_ucode_key_idx(struct il_priv *il) -{ - int i; - - for (i = 0; i < il->sta_key_max_num; i++) - if (!test_and_set_bit(i, &il->ucode_key_table)) - return i; - - return WEP_INVALID_OFFSET; -} -EXPORT_SYMBOL(il_get_free_ucode_key_idx); - -void -il_dealloc_bcast_stations(struct il_priv *il) -{ - unsigned long flags; - int i; - - spin_lock_irqsave(&il->sta_lock, flags); - for (i = 0; i < il->hw_params.max_stations; i++) { - if (!(il->stations[i].used & IL_STA_BCAST)) - continue; - - il->stations[i].used &= ~IL_STA_UCODE_ACTIVE; - il->num_stations--; - BUG_ON(il->num_stations < 0); - kfree(il->stations[i].lq); - il->stations[i].lq = NULL; - } - spin_unlock_irqrestore(&il->sta_lock, flags); -} -EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations); - -#ifdef CONFIG_IWLEGACY_DEBUG -static void -il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq) -{ - int i; - D_RATE("lq station id 0x%x\n", lq->sta_id); - D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk, - lq->general_params.dual_stream_ant_msk); - - for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) - D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags); -} -#else -static inline void -il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq) -{ -} -#endif - -/** - * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity - * - * It sometimes happens when a HT rate has been in use and we - * loose connectivity with AP then mac80211 will first tell us that the - * current channel is not HT anymore before removing the station. In such a - * scenario the RXON flags will be updated to indicate we are not - * communicating HT anymore, but the LQ command may still contain HT rates. - * Test for this to prevent driver from sending LQ command between the time - * RXON flags are updated and when LQ command is updated. - */ -static bool -il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq) -{ - int i; - - if (il->ht.enabled) - return true; - - D_INFO("Channel %u is not an HT channel\n", il->active.channel); - for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { - if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) { - D_INFO("idx %d of LQ expects HT channel\n", i); - return false; - } - } - return true; -} - -/** - * il_send_lq_cmd() - Send link quality command - * @init: This command is sent as part of station initialization right - * after station has been added. - * - * The link quality command is sent as the last step of station creation. - * This is the special case in which init is set and we call a callback in - * this case to clear the state indicating that station creation is in - * progress. - */ -int -il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq, - u8 flags, bool init) -{ - int ret = 0; - unsigned long flags_spin; - - struct il_host_cmd cmd = { - .id = C_TX_LINK_QUALITY_CMD, - .len = sizeof(struct il_link_quality_cmd), - .flags = flags, - .data = lq, - }; - - if (WARN_ON(lq->sta_id == IL_INVALID_STATION)) - return -EINVAL; - - spin_lock_irqsave(&il->sta_lock, flags_spin); - if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) { - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - return -EINVAL; - } - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - - il_dump_lq_cmd(il, lq); - BUG_ON(init && (cmd.flags & CMD_ASYNC)); - - if (il_is_lq_table_valid(il, lq)) - ret = il_send_cmd(il, &cmd); - else - ret = -EINVAL; - - if (cmd.flags & CMD_ASYNC) - return ret; - - if (init) { - D_INFO("init LQ command complete," - " clearing sta addition status for sta %d\n", - lq->sta_id); - spin_lock_irqsave(&il->sta_lock, flags_spin); - il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS; - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - } - return ret; -} -EXPORT_SYMBOL(il_send_lq_cmd); - -int -il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, - struct ieee80211_sta *sta) -{ - struct il_priv *il = hw->priv; - struct il_station_priv_common *sta_common = (void *)sta->drv_priv; - int ret; - - mutex_lock(&il->mutex); - D_MAC80211("enter station %pM\n", sta->addr); - - ret = il_remove_station(il, sta_common->sta_id, sta->addr); - if (ret) - IL_ERR("Error removing station %pM\n", sta->addr); - - D_MAC80211("leave ret %d\n", ret); - mutex_unlock(&il->mutex); - - return ret; -} -EXPORT_SYMBOL(il_mac_sta_remove); - -/************************** RX-FUNCTIONS ****************************/ -/* - * Rx theory of operation - * - * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs), - * each of which point to Receive Buffers to be filled by the NIC. These get - * used not only for Rx frames, but for any command response or notification - * from the NIC. The driver and NIC manage the Rx buffers by means - * of idxes into the circular buffer. - * - * Rx Queue Indexes - * The host/firmware share two idx registers for managing the Rx buffers. - * - * The READ idx maps to the first position that the firmware may be writing - * to -- the driver can read up to (but not including) this position and get - * good data. - * The READ idx is managed by the firmware once the card is enabled. - * - * The WRITE idx maps to the last position the driver has read from -- the - * position preceding WRITE is the last slot the firmware can place a packet. - * - * The queue is empty (no good data) if WRITE = READ - 1, and is full if - * WRITE = READ. - * - * During initialization, the host sets up the READ queue position to the first - * IDX position, and WRITE to the last (READ - 1 wrapped) - * - * When the firmware places a packet in a buffer, it will advance the READ idx - * and fire the RX interrupt. The driver can then query the READ idx and - * process as many packets as possible, moving the WRITE idx forward as it - * resets the Rx queue buffers with new memory. - * - * The management in the driver is as follows: - * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When - * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled - * to replenish the iwl->rxq->rx_free. - * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the - * iwl->rxq is replenished and the READ IDX is updated (updating the - * 'processed' and 'read' driver idxes as well) - * + A received packet is processed and handed to the kernel network stack, - * detached from the iwl->rxq. The driver 'processed' idx is updated. - * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free - * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ - * IDX is not incremented and iwl->status(RX_STALLED) is set. If there - * were enough free buffers and RX_STALLED is set it is cleared. - * - * - * Driver sequence: - * - * il_rx_queue_alloc() Allocates rx_free - * il_rx_replenish() Replenishes rx_free list from rx_used, and calls - * il_rx_queue_restock - * il_rx_queue_restock() Moves available buffers from rx_free into Rx - * queue, updates firmware pointers, and updates - * the WRITE idx. If insufficient rx_free buffers - * are available, schedules il_rx_replenish - * - * -- enable interrupts -- - * ISR - il_rx() Detach il_rx_bufs from pool up to the - * READ IDX, detaching the SKB from the pool. - * Moves the packet buffer from queue to rx_used. - * Calls il_rx_queue_restock to refill any empty - * slots. - * ... - * - */ - -/** - * il_rx_queue_space - Return number of free slots available in queue. - */ -int -il_rx_queue_space(const struct il_rx_queue *q) -{ - int s = q->read - q->write; - if (s <= 0) - s += RX_QUEUE_SIZE; - /* keep some buffer to not confuse full and empty queue */ - s -= 2; - if (s < 0) - s = 0; - return s; -} -EXPORT_SYMBOL(il_rx_queue_space); - -/** - * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue - */ -void -il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q) -{ - unsigned long flags; - u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg; - u32 reg; - - spin_lock_irqsave(&q->lock, flags); - - if (q->need_update == 0) - goto exit_unlock; - - /* If power-saving is in use, make sure device is awake */ - if (test_bit(S_POWER_PMI, &il->status)) { - reg = _il_rd(il, CSR_UCODE_DRV_GP1); - - if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { - D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n", - reg); - il_set_bit(il, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - goto exit_unlock; - } - - q->write_actual = (q->write & ~0x7); - il_wr(il, rx_wrt_ptr_reg, q->write_actual); - - /* Else device is assumed to be awake */ - } else { - /* Device expects a multiple of 8 */ - q->write_actual = (q->write & ~0x7); - il_wr(il, rx_wrt_ptr_reg, q->write_actual); - } - - q->need_update = 0; - -exit_unlock: - spin_unlock_irqrestore(&q->lock, flags); -} -EXPORT_SYMBOL(il_rx_queue_update_write_ptr); - -int -il_rx_queue_alloc(struct il_priv *il) -{ - struct il_rx_queue *rxq = &il->rxq; - struct device *dev = &il->pci_dev->dev; - int i; - - spin_lock_init(&rxq->lock); - INIT_LIST_HEAD(&rxq->rx_free); - INIT_LIST_HEAD(&rxq->rx_used); - - /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */ - rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma, - GFP_KERNEL); - if (!rxq->bd) - goto err_bd; - - rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status), - &rxq->rb_stts_dma, GFP_KERNEL); - if (!rxq->rb_stts) - goto err_rb; - - /* Fill the rx_used queue with _all_ of the Rx buffers */ - for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) - list_add_tail(&rxq->pool[i].list, &rxq->rx_used); - - /* Set us so that we have processed and used all buffers, but have - * not restocked the Rx queue with fresh buffers */ - rxq->read = rxq->write = 0; - rxq->write_actual = 0; - rxq->free_count = 0; - rxq->need_update = 0; - return 0; - -err_rb: - dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd, - rxq->bd_dma); -err_bd: - return -ENOMEM; -} -EXPORT_SYMBOL(il_rx_queue_alloc); - -void -il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb) -{ - struct il_rx_pkt *pkt = rxb_addr(rxb); - struct il_spectrum_notification *report = &(pkt->u.spectrum_notif); - - if (!report->state) { - D_11H("Spectrum Measure Notification: Start\n"); - return; - } - - memcpy(&il->measure_report, report, sizeof(*report)); - il->measurement_status |= MEASUREMENT_READY; -} -EXPORT_SYMBOL(il_hdl_spectrum_measurement); - -/* - * returns non-zero if packet should be dropped - */ -int -il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr, - u32 decrypt_res, struct ieee80211_rx_status *stats) -{ - u16 fc = le16_to_cpu(hdr->frame_control); - - /* - * All contexts have the same setting here due to it being - * a module parameter, so OK to check any context. - */ - if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK) - return 0; - - if (!(fc & IEEE80211_FCTL_PROTECTED)) - return 0; - - D_RX("decrypt_res:0x%x\n", decrypt_res); - switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) { - case RX_RES_STATUS_SEC_TYPE_TKIP: - /* The uCode has got a bad phase 1 Key, pushes the packet. - * Decryption will be done in SW. */ - if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == - RX_RES_STATUS_BAD_KEY_TTAK) - break; - - case RX_RES_STATUS_SEC_TYPE_WEP: - if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == - RX_RES_STATUS_BAD_ICV_MIC) { - /* bad ICV, the packet is destroyed since the - * decryption is inplace, drop it */ - D_RX("Packet destroyed\n"); - return -1; - } - case RX_RES_STATUS_SEC_TYPE_CCMP: - if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == - RX_RES_STATUS_DECRYPT_OK) { - D_RX("hw decrypt successfully!!!\n"); - stats->flag |= RX_FLAG_DECRYPTED; - } - break; - - default: - break; - } - return 0; -} -EXPORT_SYMBOL(il_set_decrypted_flag); - -/** - * il_txq_update_write_ptr - Send new write idx to hardware - */ -void -il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq) -{ - u32 reg = 0; - int txq_id = txq->q.id; - - if (txq->need_update == 0) - return; - - /* if we're trying to save power */ - if (test_bit(S_POWER_PMI, &il->status)) { - /* wake up nic if it's powered down ... - * uCode will wake up, and interrupt us again, so next - * time we'll skip this part. */ - reg = _il_rd(il, CSR_UCODE_DRV_GP1); - - if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { - D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n", - txq_id, reg); - il_set_bit(il, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - return; - } - - il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8)); - - /* - * else not in power-save mode, - * uCode will never sleep when we're - * trying to tx (during RFKILL, we're not trying to tx). - */ - } else - _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8)); - txq->need_update = 0; -} -EXPORT_SYMBOL(il_txq_update_write_ptr); - -/** - * il_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's - */ -void -il_tx_queue_unmap(struct il_priv *il, int txq_id) -{ - struct il_tx_queue *txq = &il->txq[txq_id]; - struct il_queue *q = &txq->q; - - if (q->n_bd == 0) - return; - - while (q->write_ptr != q->read_ptr) { - il->ops->txq_free_tfd(il, txq); - q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd); - } -} -EXPORT_SYMBOL(il_tx_queue_unmap); - -/** - * il_tx_queue_free - Deallocate DMA queue. - * @txq: Transmit queue to deallocate. - * - * Empty queue by removing and destroying all BD's. - * Free all buffers. - * 0-fill, but do not free "txq" descriptor structure. - */ -void -il_tx_queue_free(struct il_priv *il, int txq_id) -{ - struct il_tx_queue *txq = &il->txq[txq_id]; - struct device *dev = &il->pci_dev->dev; - int i; - - il_tx_queue_unmap(il, txq_id); - - /* De-alloc array of command/tx buffers */ - for (i = 0; i < TFD_TX_CMD_SLOTS; i++) - kfree(txq->cmd[i]); - - /* De-alloc circular buffer of TFDs */ - if (txq->q.n_bd) - dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd, - txq->tfds, txq->q.dma_addr); - - /* De-alloc array of per-TFD driver data */ - kfree(txq->skbs); - txq->skbs = NULL; - - /* deallocate arrays */ - kfree(txq->cmd); - kfree(txq->meta); - txq->cmd = NULL; - txq->meta = NULL; - - /* 0-fill queue descriptor structure */ - memset(txq, 0, sizeof(*txq)); -} -EXPORT_SYMBOL(il_tx_queue_free); - -/** - * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue - */ -void -il_cmd_queue_unmap(struct il_priv *il) -{ - struct il_tx_queue *txq = &il->txq[il->cmd_queue]; - struct il_queue *q = &txq->q; - int i; - - if (q->n_bd == 0) - return; - - while (q->read_ptr != q->write_ptr) { - i = il_get_cmd_idx(q, q->read_ptr, 0); - - if (txq->meta[i].flags & CMD_MAPPED) { - pci_unmap_single(il->pci_dev, - dma_unmap_addr(&txq->meta[i], mapping), - dma_unmap_len(&txq->meta[i], len), - PCI_DMA_BIDIRECTIONAL); - txq->meta[i].flags = 0; - } - - q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd); - } - - i = q->n_win; - if (txq->meta[i].flags & CMD_MAPPED) { - pci_unmap_single(il->pci_dev, - dma_unmap_addr(&txq->meta[i], mapping), - dma_unmap_len(&txq->meta[i], len), - PCI_DMA_BIDIRECTIONAL); - txq->meta[i].flags = 0; - } -} -EXPORT_SYMBOL(il_cmd_queue_unmap); - -/** - * il_cmd_queue_free - Deallocate DMA queue. - * @txq: Transmit queue to deallocate. - * - * Empty queue by removing and destroying all BD's. - * Free all buffers. - * 0-fill, but do not free "txq" descriptor structure. - */ -void -il_cmd_queue_free(struct il_priv *il) -{ - struct il_tx_queue *txq = &il->txq[il->cmd_queue]; - struct device *dev = &il->pci_dev->dev; - int i; - - il_cmd_queue_unmap(il); - - /* De-alloc array of command/tx buffers */ - for (i = 0; i <= TFD_CMD_SLOTS; i++) - kfree(txq->cmd[i]); - - /* De-alloc circular buffer of TFDs */ - if (txq->q.n_bd) - dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd, - txq->tfds, txq->q.dma_addr); - - /* deallocate arrays */ - kfree(txq->cmd); - kfree(txq->meta); - txq->cmd = NULL; - txq->meta = NULL; - - /* 0-fill queue descriptor structure */ - memset(txq, 0, sizeof(*txq)); -} -EXPORT_SYMBOL(il_cmd_queue_free); - -/*************** DMA-QUEUE-GENERAL-FUNCTIONS ***** - * DMA services - * - * Theory of operation - * - * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer - * of buffer descriptors, each of which points to one or more data buffers for - * the device to read from or fill. Driver and device exchange status of each - * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty - * entries in each circular buffer, to protect against confusing empty and full - * queue states. - * - * The device reads or writes the data in the queues via the device's several - * DMA/FIFO channels. Each queue is mapped to a single DMA channel. - * - * For Tx queue, there are low mark and high mark limits. If, after queuing - * the packet for Tx, free space become < low mark, Tx queue stopped. When - * reclaiming packets (on 'tx done IRQ), if free space become > high mark, - * Tx queue resumed. - * - * See more detailed info in 4965.h. - ***************************************************/ - -int -il_queue_space(const struct il_queue *q) -{ - int s = q->read_ptr - q->write_ptr; - - if (q->read_ptr > q->write_ptr) - s -= q->n_bd; - - if (s <= 0) - s += q->n_win; - /* keep some reserve to not confuse empty and full situations */ - s -= 2; - if (s < 0) - s = 0; - return s; -} -EXPORT_SYMBOL(il_queue_space); - - -/** - * il_queue_init - Initialize queue's high/low-water and read/write idxes - */ -static int -il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id) -{ - /* - * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise - * il_queue_inc_wrap and il_queue_dec_wrap are broken. - */ - BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1)); - /* FIXME: remove q->n_bd */ - q->n_bd = TFD_QUEUE_SIZE_MAX; - - q->n_win = slots; - q->id = id; - - /* slots_must be power-of-two size, otherwise - * il_get_cmd_idx is broken. */ - BUG_ON(!is_power_of_2(slots)); - - q->low_mark = q->n_win / 4; - if (q->low_mark < 4) - q->low_mark = 4; - - q->high_mark = q->n_win / 8; - if (q->high_mark < 2) - q->high_mark = 2; - - q->write_ptr = q->read_ptr = 0; - - return 0; -} - -/** - * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue - */ -static int -il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id) -{ - struct device *dev = &il->pci_dev->dev; - size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX; - - /* Driver ilate data, only for Tx (not command) queues, - * not shared with device. */ - if (id != il->cmd_queue) { - txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX, - sizeof(struct sk_buff *), - GFP_KERNEL); - if (!txq->skbs) { - IL_ERR("Fail to alloc skbs\n"); - goto error; - } - } else - txq->skbs = NULL; - - /* Circular buffer of transmit frame descriptors (TFDs), - * shared with device */ - txq->tfds = - dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL); - if (!txq->tfds) - goto error; - - txq->q.id = id; - - return 0; - -error: - kfree(txq->skbs); - txq->skbs = NULL; - - return -ENOMEM; -} - -/** - * il_tx_queue_init - Allocate and initialize one tx/cmd queue - */ -int -il_tx_queue_init(struct il_priv *il, u32 txq_id) -{ - int i, len, ret; - int slots, actual_slots; - struct il_tx_queue *txq = &il->txq[txq_id]; - - /* - * Alloc buffer array for commands (Tx or other types of commands). - * For the command queue (#4/#9), allocate command space + one big - * command for scan, since scan command is very huge; the system will - * not have two scans at the same time, so only one is needed. - * For normal Tx queues (all other queues), no super-size command - * space is needed. - */ - if (txq_id == il->cmd_queue) { - slots = TFD_CMD_SLOTS; - actual_slots = slots + 1; - } else { - slots = TFD_TX_CMD_SLOTS; - actual_slots = slots; - } - - txq->meta = - kzalloc(sizeof(struct il_cmd_meta) * actual_slots, GFP_KERNEL); - txq->cmd = - kzalloc(sizeof(struct il_device_cmd *) * actual_slots, GFP_KERNEL); - - if (!txq->meta || !txq->cmd) - goto out_free_arrays; - - len = sizeof(struct il_device_cmd); - for (i = 0; i < actual_slots; i++) { - /* only happens for cmd queue */ - if (i == slots) - len = IL_MAX_CMD_SIZE; - - txq->cmd[i] = kmalloc(len, GFP_KERNEL); - if (!txq->cmd[i]) - goto err; - } - - /* Alloc driver data array and TFD circular buffer */ - ret = il_tx_queue_alloc(il, txq, txq_id); - if (ret) - goto err; - - txq->need_update = 0; - - /* - * For the default queues 0-3, set up the swq_id - * already -- all others need to get one later - * (if they need one at all). - */ - if (txq_id < 4) - il_set_swq_id(txq, txq_id, txq_id); - - /* Initialize queue's high/low-water marks, and head/tail idxes */ - il_queue_init(il, &txq->q, slots, txq_id); - - /* Tell device where to find queue */ - il->ops->txq_init(il, txq); - - return 0; -err: - for (i = 0; i < actual_slots; i++) - kfree(txq->cmd[i]); -out_free_arrays: - kfree(txq->meta); - kfree(txq->cmd); - - return -ENOMEM; -} -EXPORT_SYMBOL(il_tx_queue_init); - -void -il_tx_queue_reset(struct il_priv *il, u32 txq_id) -{ - int slots, actual_slots; - struct il_tx_queue *txq = &il->txq[txq_id]; - - if (txq_id == il->cmd_queue) { - slots = TFD_CMD_SLOTS; - actual_slots = TFD_CMD_SLOTS + 1; - } else { - slots = TFD_TX_CMD_SLOTS; - actual_slots = TFD_TX_CMD_SLOTS; - } - - memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots); - txq->need_update = 0; - - /* Initialize queue's high/low-water marks, and head/tail idxes */ - il_queue_init(il, &txq->q, slots, txq_id); - - /* Tell device where to find queue */ - il->ops->txq_init(il, txq); -} -EXPORT_SYMBOL(il_tx_queue_reset); - -/*************** HOST COMMAND QUEUE FUNCTIONS *****/ - -/** - * il_enqueue_hcmd - enqueue a uCode command - * @il: device ilate data point - * @cmd: a point to the ucode command structure - * - * The function returns < 0 values to indicate the operation is - * failed. On success, it turns the idx (> 0) of command in the - * command queue. - */ -int -il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd) -{ - struct il_tx_queue *txq = &il->txq[il->cmd_queue]; - struct il_queue *q = &txq->q; - struct il_device_cmd *out_cmd; - struct il_cmd_meta *out_meta; - dma_addr_t phys_addr; - unsigned long flags; - int len; - u32 idx; - u16 fix_size; - - cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len); - fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr)); - - /* If any of the command structures end up being larger than - * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then - * we will need to increase the size of the TFD entries - * Also, check to see if command buffer should not exceed the size - * of device_cmd and max_cmd_size. */ - BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) && - !(cmd->flags & CMD_SIZE_HUGE)); - BUG_ON(fix_size > IL_MAX_CMD_SIZE); - - if (il_is_rfkill(il) || il_is_ctkill(il)) { - IL_WARN("Not sending command - %s KILL\n", - il_is_rfkill(il) ? "RF" : "CT"); - return -EIO; - } - - spin_lock_irqsave(&il->hcmd_lock, flags); - - if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) { - spin_unlock_irqrestore(&il->hcmd_lock, flags); - - IL_ERR("Restarting adapter due to command queue full\n"); - queue_work(il->workqueue, &il->restart); - return -ENOSPC; - } - - idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE); - out_cmd = txq->cmd[idx]; - out_meta = &txq->meta[idx]; - - if (WARN_ON(out_meta->flags & CMD_MAPPED)) { - spin_unlock_irqrestore(&il->hcmd_lock, flags); - return -ENOSPC; - } - - memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */ - out_meta->flags = cmd->flags | CMD_MAPPED; - if (cmd->flags & CMD_WANT_SKB) - out_meta->source = cmd; - if (cmd->flags & CMD_ASYNC) - out_meta->callback = cmd->callback; - - out_cmd->hdr.cmd = cmd->id; - memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len); - - /* At this point, the out_cmd now has all of the incoming cmd - * information */ - - out_cmd->hdr.flags = 0; - out_cmd->hdr.sequence = - cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr)); - if (cmd->flags & CMD_SIZE_HUGE) - out_cmd->hdr.sequence |= SEQ_HUGE_FRAME; - len = sizeof(struct il_device_cmd); - if (idx == TFD_CMD_SLOTS) - len = IL_MAX_CMD_SIZE; - -#ifdef CONFIG_IWLEGACY_DEBUG - switch (out_cmd->hdr.cmd) { - case C_TX_LINK_QUALITY_CMD: - case C_SENSITIVITY: - D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, " - "%d bytes at %d[%d]:%d\n", - il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd, - le16_to_cpu(out_cmd->hdr.sequence), fix_size, - q->write_ptr, idx, il->cmd_queue); - break; - default: - D_HC("Sending command %s (#%x), seq: 0x%04X, " - "%d bytes at %d[%d]:%d\n", - il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd, - le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr, - idx, il->cmd_queue); - } -#endif - - phys_addr = - pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size, - PCI_DMA_BIDIRECTIONAL); - if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) { - idx = -ENOMEM; - goto out; - } - dma_unmap_addr_set(out_meta, mapping, phys_addr); - dma_unmap_len_set(out_meta, len, fix_size); - - txq->need_update = 1; - - if (il->ops->txq_update_byte_cnt_tbl) - /* Set up entry in queue's byte count circular buffer */ - il->ops->txq_update_byte_cnt_tbl(il, txq, 0); - - il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1, - U32_PAD(cmd->len)); - - /* Increment and update queue's write idx */ - q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd); - il_txq_update_write_ptr(il, txq); - -out: - spin_unlock_irqrestore(&il->hcmd_lock, flags); - return idx; -} - -/** - * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd - * - * When FW advances 'R' idx, all entries between old and new 'R' idx - * need to be reclaimed. As result, some free space forms. If there is - * enough free space (> low mark), wake the stack that feeds us. - */ -static void -il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx) -{ - struct il_tx_queue *txq = &il->txq[txq_id]; - struct il_queue *q = &txq->q; - int nfreed = 0; - - if (idx >= q->n_bd || il_queue_used(q, idx) == 0) { - IL_ERR("Read idx for DMA queue txq id (%d), idx %d, " - "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd, - q->write_ptr, q->read_ptr); - return; - } - - for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx; - q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) { - - if (nfreed++ > 0) { - IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx, - q->write_ptr, q->read_ptr); - queue_work(il->workqueue, &il->restart); - } - - } -} - -/** - * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them - * @rxb: Rx buffer to reclaim - * - * If an Rx buffer has an async callback associated with it the callback - * will be executed. The attached skb (if present) will only be freed - * if the callback returns 1 - */ -void -il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb) -{ - struct il_rx_pkt *pkt = rxb_addr(rxb); - u16 sequence = le16_to_cpu(pkt->hdr.sequence); - int txq_id = SEQ_TO_QUEUE(sequence); - int idx = SEQ_TO_IDX(sequence); - int cmd_idx; - bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME); - struct il_device_cmd *cmd; - struct il_cmd_meta *meta; - struct il_tx_queue *txq = &il->txq[il->cmd_queue]; - unsigned long flags; - - /* If a Tx command is being handled and it isn't in the actual - * command queue then there a command routing bug has been introduced - * in the queue management code. */ - if (WARN - (txq_id != il->cmd_queue, - "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n", - txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr, - il->txq[il->cmd_queue].q.write_ptr)) { - il_print_hex_error(il, pkt, 32); - return; - } - - cmd_idx = il_get_cmd_idx(&txq->q, idx, huge); - cmd = txq->cmd[cmd_idx]; - meta = &txq->meta[cmd_idx]; - - txq->time_stamp = jiffies; - - pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping), - dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL); - - /* Input error checking is done when commands are added to queue. */ - if (meta->flags & CMD_WANT_SKB) { - meta->source->reply_page = (unsigned long)rxb_addr(rxb); - rxb->page = NULL; - } else if (meta->callback) - meta->callback(il, cmd, pkt); - - spin_lock_irqsave(&il->hcmd_lock, flags); - - il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx); - - if (!(meta->flags & CMD_ASYNC)) { - clear_bit(S_HCMD_ACTIVE, &il->status); - D_INFO("Clearing HCMD_ACTIVE for command %s\n", - il_get_cmd_string(cmd->hdr.cmd)); - wake_up(&il->wait_command_queue); - } - - /* Mark as unmapped */ - meta->flags = 0; - - spin_unlock_irqrestore(&il->hcmd_lock, flags); -} -EXPORT_SYMBOL(il_tx_cmd_complete); - -MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965"); -MODULE_VERSION(IWLWIFI_VERSION); -MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); -MODULE_LICENSE("GPL"); - -/* - * set bt_coex_active to true, uCode will do kill/defer - * every time the priority line is asserted (BT is sending signals on the - * priority line in the PCIx). - * set bt_coex_active to false, uCode will ignore the BT activity and - * perform the normal operation - * - * User might experience transmit issue on some platform due to WiFi/BT - * co-exist problem. The possible behaviors are: - * Able to scan and finding all the available AP - * Not able to associate with any AP - * On those platforms, WiFi communication can be restored by set - * "bt_coex_active" module parameter to "false" - * - * default: bt_coex_active = true (BT_COEX_ENABLE) - */ -static bool bt_coex_active = true; -module_param(bt_coex_active, bool, S_IRUGO); -MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist"); - -u32 il_debug_level; -EXPORT_SYMBOL(il_debug_level); - -const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; -EXPORT_SYMBOL(il_bcast_addr); - -#define MAX_BIT_RATE_40_MHZ 150 /* Mbps */ -#define MAX_BIT_RATE_20_MHZ 72 /* Mbps */ -static void -il_init_ht_hw_capab(const struct il_priv *il, - struct ieee80211_sta_ht_cap *ht_info, - enum ieee80211_band band) -{ - u16 max_bit_rate = 0; - u8 rx_chains_num = il->hw_params.rx_chains_num; - u8 tx_chains_num = il->hw_params.tx_chains_num; - - ht_info->cap = 0; - memset(&ht_info->mcs, 0, sizeof(ht_info->mcs)); - - ht_info->ht_supported = true; - - ht_info->cap |= IEEE80211_HT_CAP_SGI_20; - max_bit_rate = MAX_BIT_RATE_20_MHZ; - if (il->hw_params.ht40_channel & BIT(band)) { - ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40; - ht_info->cap |= IEEE80211_HT_CAP_SGI_40; - ht_info->mcs.rx_mask[4] = 0x01; - max_bit_rate = MAX_BIT_RATE_40_MHZ; - } - - if (il->cfg->mod_params->amsdu_size_8K) - ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU; - - ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF; - ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF; - - ht_info->mcs.rx_mask[0] = 0xFF; - if (rx_chains_num >= 2) - ht_info->mcs.rx_mask[1] = 0xFF; - if (rx_chains_num >= 3) - ht_info->mcs.rx_mask[2] = 0xFF; - - /* Highest supported Rx data rate */ - max_bit_rate *= rx_chains_num; - WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK); - ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate); - - /* Tx MCS capabilities */ - ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; - if (tx_chains_num != rx_chains_num) { - ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF; - ht_info->mcs.tx_params |= - ((tx_chains_num - - 1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT); - } -} - -/** - * il_init_geos - Initialize mac80211's geo/channel info based from eeprom - */ -int -il_init_geos(struct il_priv *il) -{ - struct il_channel_info *ch; - struct ieee80211_supported_band *sband; - struct ieee80211_channel *channels; - struct ieee80211_channel *geo_ch; - struct ieee80211_rate *rates; - int i = 0; - s8 max_tx_power = 0; - - if (il->bands[IEEE80211_BAND_2GHZ].n_bitrates || - il->bands[IEEE80211_BAND_5GHZ].n_bitrates) { - D_INFO("Geography modes already initialized.\n"); - set_bit(S_GEO_CONFIGURED, &il->status); - return 0; - } - - channels = - kzalloc(sizeof(struct ieee80211_channel) * il->channel_count, - GFP_KERNEL); - if (!channels) - return -ENOMEM; - - rates = - kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY), - GFP_KERNEL); - if (!rates) { - kfree(channels); - return -ENOMEM; - } - - /* 5.2GHz channels start after the 2.4GHz channels */ - sband = &il->bands[IEEE80211_BAND_5GHZ]; - sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)]; - /* just OFDM */ - sband->bitrates = &rates[IL_FIRST_OFDM_RATE]; - sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE; - - if (il->cfg->sku & IL_SKU_N) - il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_5GHZ); - - sband = &il->bands[IEEE80211_BAND_2GHZ]; - sband->channels = channels; - /* OFDM & CCK */ - sband->bitrates = rates; - sband->n_bitrates = RATE_COUNT_LEGACY; - - if (il->cfg->sku & IL_SKU_N) - il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_2GHZ); - - il->ieee_channels = channels; - il->ieee_rates = rates; - - for (i = 0; i < il->channel_count; i++) { - ch = &il->channel_info[i]; - - if (!il_is_channel_valid(ch)) - continue; - - sband = &il->bands[ch->band]; - - geo_ch = &sband->channels[sband->n_channels++]; - - geo_ch->center_freq = - ieee80211_channel_to_frequency(ch->channel, ch->band); - geo_ch->max_power = ch->max_power_avg; - geo_ch->max_antenna_gain = 0xff; - geo_ch->hw_value = ch->channel; - - if (il_is_channel_valid(ch)) { - if (!(ch->flags & EEPROM_CHANNEL_IBSS)) - geo_ch->flags |= IEEE80211_CHAN_NO_IR; - - if (!(ch->flags & EEPROM_CHANNEL_ACTIVE)) - geo_ch->flags |= IEEE80211_CHAN_NO_IR; - - if (ch->flags & EEPROM_CHANNEL_RADAR) - geo_ch->flags |= IEEE80211_CHAN_RADAR; - - geo_ch->flags |= ch->ht40_extension_channel; - - if (ch->max_power_avg > max_tx_power) - max_tx_power = ch->max_power_avg; - } else { - geo_ch->flags |= IEEE80211_CHAN_DISABLED; - } - - D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel, - geo_ch->center_freq, - il_is_channel_a_band(ch) ? "5.2" : "2.4", - geo_ch-> - flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid", - geo_ch->flags); - } - - il->tx_power_device_lmt = max_tx_power; - il->tx_power_user_lmt = max_tx_power; - il->tx_power_next = max_tx_power; - - if (il->bands[IEEE80211_BAND_5GHZ].n_channels == 0 && - (il->cfg->sku & IL_SKU_A)) { - IL_INFO("Incorrectly detected BG card as ABG. " - "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n", - il->pci_dev->device, il->pci_dev->subsystem_device); - il->cfg->sku &= ~IL_SKU_A; - } - - IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n", - il->bands[IEEE80211_BAND_2GHZ].n_channels, - il->bands[IEEE80211_BAND_5GHZ].n_channels); - - set_bit(S_GEO_CONFIGURED, &il->status); - - return 0; -} -EXPORT_SYMBOL(il_init_geos); - -/* - * il_free_geos - undo allocations in il_init_geos - */ -void -il_free_geos(struct il_priv *il) -{ - kfree(il->ieee_channels); - kfree(il->ieee_rates); - clear_bit(S_GEO_CONFIGURED, &il->status); -} -EXPORT_SYMBOL(il_free_geos); - -static bool -il_is_channel_extension(struct il_priv *il, enum ieee80211_band band, - u16 channel, u8 extension_chan_offset) -{ - const struct il_channel_info *ch_info; - - ch_info = il_get_channel_info(il, band, channel); - if (!il_is_channel_valid(ch_info)) - return false; - - if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) - return !(ch_info-> - ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS); - else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) - return !(ch_info-> - ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS); - - return false; -} - -bool -il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap) -{ - if (!il->ht.enabled || !il->ht.is_40mhz) - return false; - - /* - * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40 - * the bit will not set if it is pure 40MHz case - */ - if (ht_cap && !ht_cap->ht_supported) - return false; - -#ifdef CONFIG_IWLEGACY_DEBUGFS - if (il->disable_ht40) - return false; -#endif - - return il_is_channel_extension(il, il->band, - le16_to_cpu(il->staging.channel), - il->ht.extension_chan_offset); -} -EXPORT_SYMBOL(il_is_ht40_tx_allowed); - -static u16 -il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val) -{ - u16 new_val; - u16 beacon_factor; - - /* - * If mac80211 hasn't given us a beacon interval, program - * the default into the device. - */ - if (!beacon_val) - return DEFAULT_BEACON_INTERVAL; - - /* - * If the beacon interval we obtained from the peer - * is too large, we'll have to wake up more often - * (and in IBSS case, we'll beacon too much) - * - * For example, if max_beacon_val is 4096, and the - * requested beacon interval is 7000, we'll have to - * use 3500 to be able to wake up on the beacons. - * - * This could badly influence beacon detection stats. - */ - - beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val; - new_val = beacon_val / beacon_factor; - - if (!new_val) - new_val = max_beacon_val; - - return new_val; -} - -int -il_send_rxon_timing(struct il_priv *il) -{ - u64 tsf; - s32 interval_tm, rem; - struct ieee80211_conf *conf = NULL; - u16 beacon_int; - struct ieee80211_vif *vif = il->vif; - - conf = &il->hw->conf; - - lockdep_assert_held(&il->mutex); - - memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd)); - - il->timing.timestamp = cpu_to_le64(il->timestamp); - il->timing.listen_interval = cpu_to_le16(conf->listen_interval); - - beacon_int = vif ? vif->bss_conf.beacon_int : 0; - - /* - * TODO: For IBSS we need to get atim_win from mac80211, - * for now just always use 0 - */ - il->timing.atim_win = 0; - - beacon_int = - il_adjust_beacon_interval(beacon_int, - il->hw_params.max_beacon_itrvl * - TIME_UNIT); - il->timing.beacon_interval = cpu_to_le16(beacon_int); - - tsf = il->timestamp; /* tsf is modifed by do_div: copy it */ - interval_tm = beacon_int * TIME_UNIT; - rem = do_div(tsf, interval_tm); - il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem); - - il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1; - - D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n", - le16_to_cpu(il->timing.beacon_interval), - le32_to_cpu(il->timing.beacon_init_val), - le16_to_cpu(il->timing.atim_win)); - - return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing), - &il->timing); -} -EXPORT_SYMBOL(il_send_rxon_timing); - -void -il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt) -{ - struct il_rxon_cmd *rxon = &il->staging; - - if (hw_decrypt) - rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK; - else - rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK; - -} -EXPORT_SYMBOL(il_set_rxon_hwcrypto); - -/* validate RXON structure is valid */ -int -il_check_rxon_cmd(struct il_priv *il) -{ - struct il_rxon_cmd *rxon = &il->staging; - bool error = false; - - if (rxon->flags & RXON_FLG_BAND_24G_MSK) { - if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) { - IL_WARN("check 2.4G: wrong narrow\n"); - error = true; - } - if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) { - IL_WARN("check 2.4G: wrong radar\n"); - error = true; - } - } else { - if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) { - IL_WARN("check 5.2G: not short slot!\n"); - error = true; - } - if (rxon->flags & RXON_FLG_CCK_MSK) { - IL_WARN("check 5.2G: CCK!\n"); - error = true; - } - } - if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) { - IL_WARN("mac/bssid mcast!\n"); - error = true; - } - - /* make sure basic rates 6Mbps and 1Mbps are supported */ - if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 && - (rxon->cck_basic_rates & RATE_1M_MASK) == 0) { - IL_WARN("neither 1 nor 6 are basic\n"); - error = true; - } - - if (le16_to_cpu(rxon->assoc_id) > 2007) { - IL_WARN("aid > 2007\n"); - error = true; - } - - if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) == - (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) { - IL_WARN("CCK and short slot\n"); - error = true; - } - - if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) == - (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) { - IL_WARN("CCK and auto detect"); - error = true; - } - - if ((rxon-> - flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) == - RXON_FLG_TGG_PROTECT_MSK) { - IL_WARN("TGg but no auto-detect\n"); - error = true; - } - - if (error) - IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel)); - - if (error) { - IL_ERR("Invalid RXON\n"); - return -EINVAL; - } - return 0; -} -EXPORT_SYMBOL(il_check_rxon_cmd); - -/** - * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed - * @il: staging_rxon is compared to active_rxon - * - * If the RXON structure is changing enough to require a new tune, - * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that - * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required. - */ -int -il_full_rxon_required(struct il_priv *il) -{ - const struct il_rxon_cmd *staging = &il->staging; - const struct il_rxon_cmd *active = &il->active; - -#define CHK(cond) \ - if ((cond)) { \ - D_INFO("need full RXON - " #cond "\n"); \ - return 1; \ - } - -#define CHK_NEQ(c1, c2) \ - if ((c1) != (c2)) { \ - D_INFO("need full RXON - " \ - #c1 " != " #c2 " - %d != %d\n", \ - (c1), (c2)); \ - return 1; \ - } - - /* These items are only settable from the full RXON command */ - CHK(!il_is_associated(il)); - CHK(!ether_addr_equal_64bits(staging->bssid_addr, active->bssid_addr)); - CHK(!ether_addr_equal_64bits(staging->node_addr, active->node_addr)); - CHK(!ether_addr_equal_64bits(staging->wlap_bssid_addr, - active->wlap_bssid_addr)); - CHK_NEQ(staging->dev_type, active->dev_type); - CHK_NEQ(staging->channel, active->channel); - CHK_NEQ(staging->air_propagation, active->air_propagation); - CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates, - active->ofdm_ht_single_stream_basic_rates); - CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates, - active->ofdm_ht_dual_stream_basic_rates); - CHK_NEQ(staging->assoc_id, active->assoc_id); - - /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can - * be updated with the RXON_ASSOC command -- however only some - * flag transitions are allowed using RXON_ASSOC */ - - /* Check if we are not switching bands */ - CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK, - active->flags & RXON_FLG_BAND_24G_MSK); - - /* Check if we are switching association toggle */ - CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK, - active->filter_flags & RXON_FILTER_ASSOC_MSK); - -#undef CHK -#undef CHK_NEQ - - return 0; -} -EXPORT_SYMBOL(il_full_rxon_required); - -u8 -il_get_lowest_plcp(struct il_priv *il) -{ - /* - * Assign the lowest rate -- should really get this from - * the beacon skb from mac80211. - */ - if (il->staging.flags & RXON_FLG_BAND_24G_MSK) - return RATE_1M_PLCP; - else - return RATE_6M_PLCP; -} -EXPORT_SYMBOL(il_get_lowest_plcp); - -static void -_il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf) -{ - struct il_rxon_cmd *rxon = &il->staging; - - if (!il->ht.enabled) { - rxon->flags &= - ~(RXON_FLG_CHANNEL_MODE_MSK | - RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK - | RXON_FLG_HT_PROT_MSK); - return; - } - - rxon->flags |= - cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS); - - /* Set up channel bandwidth: - * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */ - /* clear the HT channel mode before set the mode */ - rxon->flags &= - ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK); - if (il_is_ht40_tx_allowed(il, NULL)) { - /* pure ht40 */ - if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) { - rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40; - /* Note: control channel is opposite of extension channel */ - switch (il->ht.extension_chan_offset) { - case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: - rxon->flags &= - ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; - break; - case IEEE80211_HT_PARAM_CHA_SEC_BELOW: - rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; - break; - } - } else { - /* Note: control channel is opposite of extension channel */ - switch (il->ht.extension_chan_offset) { - case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: - rxon->flags &= - ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK); - rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED; - break; - case IEEE80211_HT_PARAM_CHA_SEC_BELOW: - rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; - rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED; - break; - case IEEE80211_HT_PARAM_CHA_SEC_NONE: - default: - /* channel location only valid if in Mixed mode */ - IL_ERR("invalid extension channel offset\n"); - break; - } - } - } else { - rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY; - } - - if (il->ops->set_rxon_chain) - il->ops->set_rxon_chain(il); - - D_ASSOC("rxon flags 0x%X operation mode :0x%X " - "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags), - il->ht.protection, il->ht.extension_chan_offset); -} - -void -il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf) -{ - _il_set_rxon_ht(il, ht_conf); -} -EXPORT_SYMBOL(il_set_rxon_ht); - -/* Return valid, unused, channel for a passive scan to reset the RF */ -u8 -il_get_single_channel_number(struct il_priv *il, enum ieee80211_band band) -{ - const struct il_channel_info *ch_info; - int i; - u8 channel = 0; - u8 min, max; - - if (band == IEEE80211_BAND_5GHZ) { - min = 14; - max = il->channel_count; - } else { - min = 0; - max = 14; - } - - for (i = min; i < max; i++) { - channel = il->channel_info[i].channel; - if (channel == le16_to_cpu(il->staging.channel)) - continue; - - ch_info = il_get_channel_info(il, band, channel); - if (il_is_channel_valid(ch_info)) - break; - } - - return channel; -} -EXPORT_SYMBOL(il_get_single_channel_number); - -/** - * il_set_rxon_channel - Set the band and channel values in staging RXON - * @ch: requested channel as a pointer to struct ieee80211_channel - - * NOTE: Does not commit to the hardware; it sets appropriate bit fields - * in the staging RXON flag structure based on the ch->band - */ -int -il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch) -{ - enum ieee80211_band band = ch->band; - u16 channel = ch->hw_value; - - if (le16_to_cpu(il->staging.channel) == channel && il->band == band) - return 0; - - il->staging.channel = cpu_to_le16(channel); - if (band == IEEE80211_BAND_5GHZ) - il->staging.flags &= ~RXON_FLG_BAND_24G_MSK; - else - il->staging.flags |= RXON_FLG_BAND_24G_MSK; - - il->band = band; - - D_INFO("Staging channel set to %d [%d]\n", channel, band); - - return 0; -} -EXPORT_SYMBOL(il_set_rxon_channel); - -void -il_set_flags_for_band(struct il_priv *il, enum ieee80211_band band, - struct ieee80211_vif *vif) -{ - if (band == IEEE80211_BAND_5GHZ) { - il->staging.flags &= - ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK | - RXON_FLG_CCK_MSK); - il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK; - } else { - /* Copied from il_post_associate() */ - if (vif && vif->bss_conf.use_short_slot) - il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK; - else - il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK; - - il->staging.flags |= RXON_FLG_BAND_24G_MSK; - il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK; - il->staging.flags &= ~RXON_FLG_CCK_MSK; - } -} -EXPORT_SYMBOL(il_set_flags_for_band); - -/* - * initialize rxon structure with default values from eeprom - */ -void -il_connection_init_rx_config(struct il_priv *il) -{ - const struct il_channel_info *ch_info; - - memset(&il->staging, 0, sizeof(il->staging)); - - switch (il->iw_mode) { - case NL80211_IFTYPE_UNSPECIFIED: - il->staging.dev_type = RXON_DEV_TYPE_ESS; - break; - case NL80211_IFTYPE_STATION: - il->staging.dev_type = RXON_DEV_TYPE_ESS; - il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK; - break; - case NL80211_IFTYPE_ADHOC: - il->staging.dev_type = RXON_DEV_TYPE_IBSS; - il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK; - il->staging.filter_flags = - RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK; - break; - default: - IL_ERR("Unsupported interface type %d\n", il->vif->type); - return; - } - -#if 0 - /* TODO: Figure out when short_preamble would be set and cache from - * that */ - if (!hw_to_local(il->hw)->short_preamble) - il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; - else - il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; -#endif - - ch_info = - il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel)); - - if (!ch_info) - ch_info = &il->channel_info[0]; - - il->staging.channel = cpu_to_le16(ch_info->channel); - il->band = ch_info->band; - - il_set_flags_for_band(il, il->band, il->vif); - - il->staging.ofdm_basic_rates = - (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF; - il->staging.cck_basic_rates = - (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF; - - /* clear both MIX and PURE40 mode flag */ - il->staging.flags &= - ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40); - if (il->vif) - memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN); - - il->staging.ofdm_ht_single_stream_basic_rates = 0xff; - il->staging.ofdm_ht_dual_stream_basic_rates = 0xff; -} -EXPORT_SYMBOL(il_connection_init_rx_config); - -void -il_set_rate(struct il_priv *il) -{ - const struct ieee80211_supported_band *hw = NULL; - struct ieee80211_rate *rate; - int i; - - hw = il_get_hw_mode(il, il->band); - if (!hw) { - IL_ERR("Failed to set rate: unable to get hw mode\n"); - return; - } - - il->active_rate = 0; - - for (i = 0; i < hw->n_bitrates; i++) { - rate = &(hw->bitrates[i]); - if (rate->hw_value < RATE_COUNT_LEGACY) - il->active_rate |= (1 << rate->hw_value); - } - - D_RATE("Set active_rate = %0x\n", il->active_rate); - - il->staging.cck_basic_rates = - (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF; - - il->staging.ofdm_basic_rates = - (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF; -} -EXPORT_SYMBOL(il_set_rate); - -void -il_chswitch_done(struct il_priv *il, bool is_success) -{ - if (test_bit(S_EXIT_PENDING, &il->status)) - return; - - if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status)) - ieee80211_chswitch_done(il->vif, is_success); -} -EXPORT_SYMBOL(il_chswitch_done); - -void -il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb) -{ - struct il_rx_pkt *pkt = rxb_addr(rxb); - struct il_csa_notification *csa = &(pkt->u.csa_notif); - struct il_rxon_cmd *rxon = (void *)&il->active; - - if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status)) - return; - - if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) { - rxon->channel = csa->channel; - il->staging.channel = csa->channel; - D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel)); - il_chswitch_done(il, true); - } else { - IL_ERR("CSA notif (fail) : channel %d\n", - le16_to_cpu(csa->channel)); - il_chswitch_done(il, false); - } -} -EXPORT_SYMBOL(il_hdl_csa); - -#ifdef CONFIG_IWLEGACY_DEBUG -void -il_print_rx_config_cmd(struct il_priv *il) -{ - struct il_rxon_cmd *rxon = &il->staging; - - D_RADIO("RX CONFIG:\n"); - il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon)); - D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel)); - D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags)); - D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags)); - D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type); - D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates); - D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates); - D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr); - D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr); - D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id)); -} -EXPORT_SYMBOL(il_print_rx_config_cmd); -#endif -/** - * il_irq_handle_error - called for HW or SW error interrupt from card - */ -void -il_irq_handle_error(struct il_priv *il) -{ - /* Set the FW error flag -- cleared on il_down */ - set_bit(S_FW_ERROR, &il->status); - - /* Cancel currently queued command. */ - clear_bit(S_HCMD_ACTIVE, &il->status); - - IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version); - - il->ops->dump_nic_error_log(il); - if (il->ops->dump_fh) - il->ops->dump_fh(il, NULL, false); -#ifdef CONFIG_IWLEGACY_DEBUG - if (il_get_debug_level(il) & IL_DL_FW_ERRORS) - il_print_rx_config_cmd(il); -#endif - - wake_up(&il->wait_command_queue); - - /* Keep the restart process from trying to send host - * commands by clearing the INIT status bit */ - clear_bit(S_READY, &il->status); - - if (!test_bit(S_EXIT_PENDING, &il->status)) { - IL_DBG(IL_DL_FW_ERRORS, - "Restarting adapter due to uCode error.\n"); - - if (il->cfg->mod_params->restart_fw) - queue_work(il->workqueue, &il->restart); - } -} -EXPORT_SYMBOL(il_irq_handle_error); - -static int -_il_apm_stop_master(struct il_priv *il) -{ - int ret = 0; - - /* stop device's busmaster DMA activity */ - _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER); - - ret = - _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED, - CSR_RESET_REG_FLAG_MASTER_DISABLED, 100); - if (ret < 0) - IL_WARN("Master Disable Timed Out, 100 usec\n"); - - D_INFO("stop master\n"); - - return ret; -} - -void -_il_apm_stop(struct il_priv *il) -{ - lockdep_assert_held(&il->reg_lock); - - D_INFO("Stop card, put in low power state\n"); - - /* Stop device's DMA activity */ - _il_apm_stop_master(il); - - /* Reset the entire device */ - _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); - - udelay(10); - - /* - * Clear "initialization complete" bit to move adapter from - * D0A* (powered-up Active) --> D0U* (Uninitialized) state. - */ - _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); -} -EXPORT_SYMBOL(_il_apm_stop); - -void -il_apm_stop(struct il_priv *il) -{ - unsigned long flags; - - spin_lock_irqsave(&il->reg_lock, flags); - _il_apm_stop(il); - spin_unlock_irqrestore(&il->reg_lock, flags); -} -EXPORT_SYMBOL(il_apm_stop); - -/* - * Start up NIC's basic functionality after it has been reset - * (e.g. after platform boot, or shutdown via il_apm_stop()) - * NOTE: This does not load uCode nor start the embedded processor - */ -int -il_apm_init(struct il_priv *il) -{ - int ret = 0; - u16 lctl; - - D_INFO("Init card's basic functions\n"); - - /* - * Use "set_bit" below rather than "write", to preserve any hardware - * bits already set by default after reset. - */ - - /* Disable L0S exit timer (platform NMI Work/Around) */ - il_set_bit(il, CSR_GIO_CHICKEN_BITS, - CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER); - - /* - * Disable L0s without affecting L1; - * don't wait for ICH L0s (ICH bug W/A) - */ - il_set_bit(il, CSR_GIO_CHICKEN_BITS, - CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX); - - /* Set FH wait threshold to maximum (HW error during stress W/A) */ - il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL); - - /* - * Enable HAP INTA (interrupt from management bus) to - * wake device's PCI Express link L1a -> L0s - * NOTE: This is no-op for 3945 (non-existent bit) - */ - il_set_bit(il, CSR_HW_IF_CONFIG_REG, - CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A); - - /* - * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition. - * Check if BIOS (or OS) enabled L1-ASPM on this device. - * If so (likely), disable L0S, so device moves directly L0->L1; - * costs negligible amount of power savings. - * If not (unlikely), enable L0S, so there is at least some - * power savings, even without L1. - */ - if (il->cfg->set_l0s) { - pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl); - if (lctl & PCI_EXP_LNKCTL_ASPM_L1) { - /* L1-ASPM enabled; disable(!) L0S */ - il_set_bit(il, CSR_GIO_REG, - CSR_GIO_REG_VAL_L0S_ENABLED); - D_POWER("L1 Enabled; Disabling L0S\n"); - } else { - /* L1-ASPM disabled; enable(!) L0S */ - il_clear_bit(il, CSR_GIO_REG, - CSR_GIO_REG_VAL_L0S_ENABLED); - D_POWER("L1 Disabled; Enabling L0S\n"); - } - } - - /* Configure analog phase-lock-loop before activating to D0A */ - if (il->cfg->pll_cfg_val) - il_set_bit(il, CSR_ANA_PLL_CFG, - il->cfg->pll_cfg_val); - - /* - * Set "initialization complete" bit to move adapter from - * D0U* --> D0A* (powered-up active) state. - */ - il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); - - /* - * Wait for clock stabilization; once stabilized, access to - * device-internal resources is supported, e.g. il_wr_prph() - * and accesses to uCode SRAM. - */ - ret = - _il_poll_bit(il, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, - CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000); - if (ret < 0) { - D_INFO("Failed to init the card\n"); - goto out; - } - - /* - * Enable DMA and BSM (if used) clocks, wait for them to stabilize. - * BSM (Boostrap State Machine) is only in 3945 and 4965. - * - * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits - * do not disable clocks. This preserves any hardware bits already - * set by default in "CLK_CTRL_REG" after reset. - */ - if (il->cfg->use_bsm) - il_wr_prph(il, APMG_CLK_EN_REG, - APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT); - else - il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT); - udelay(20); - - /* Disable L1-Active */ - il_set_bits_prph(il, APMG_PCIDEV_STT_REG, - APMG_PCIDEV_STT_VAL_L1_ACT_DIS); - -out: - return ret; -} -EXPORT_SYMBOL(il_apm_init); - -int -il_set_tx_power(struct il_priv *il, s8 tx_power, bool force) -{ - int ret; - s8 prev_tx_power; - bool defer; - - lockdep_assert_held(&il->mutex); - - if (il->tx_power_user_lmt == tx_power && !force) - return 0; - - if (!il->ops->send_tx_power) - return -EOPNOTSUPP; - - /* 0 dBm mean 1 milliwatt */ - if (tx_power < 0) { - IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power); - return -EINVAL; - } - - if (tx_power > il->tx_power_device_lmt) { - IL_WARN("Requested user TXPOWER %d above upper limit %d.\n", - tx_power, il->tx_power_device_lmt); - return -EINVAL; - } - - if (!il_is_ready_rf(il)) - return -EIO; - - /* scan complete and commit_rxon use tx_power_next value, - * it always need to be updated for newest request */ - il->tx_power_next = tx_power; - - /* do not set tx power when scanning or channel changing */ - defer = test_bit(S_SCANNING, &il->status) || - memcmp(&il->active, &il->staging, sizeof(il->staging)); - if (defer && !force) { - D_INFO("Deferring tx power set\n"); - return 0; - } - - prev_tx_power = il->tx_power_user_lmt; - il->tx_power_user_lmt = tx_power; - - ret = il->ops->send_tx_power(il); - - /* if fail to set tx_power, restore the orig. tx power */ - if (ret) { - il->tx_power_user_lmt = prev_tx_power; - il->tx_power_next = prev_tx_power; - } - return ret; -} -EXPORT_SYMBOL(il_set_tx_power); - -void -il_send_bt_config(struct il_priv *il) -{ - struct il_bt_cmd bt_cmd = { - .lead_time = BT_LEAD_TIME_DEF, - .max_kill = BT_MAX_KILL_DEF, - .kill_ack_mask = 0, - .kill_cts_mask = 0, - }; - - if (!bt_coex_active) - bt_cmd.flags = BT_COEX_DISABLE; - else - bt_cmd.flags = BT_COEX_ENABLE; - - D_INFO("BT coex %s\n", - (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active"); - - if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd)) - IL_ERR("failed to send BT Coex Config\n"); -} -EXPORT_SYMBOL(il_send_bt_config); - -int -il_send_stats_request(struct il_priv *il, u8 flags, bool clear) -{ - struct il_stats_cmd stats_cmd = { - .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0, - }; - - if (flags & CMD_ASYNC) - return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd), - &stats_cmd, NULL); - else - return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd), - &stats_cmd); -} -EXPORT_SYMBOL(il_send_stats_request); - -void -il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb) -{ -#ifdef CONFIG_IWLEGACY_DEBUG - struct il_rx_pkt *pkt = rxb_addr(rxb); - struct il_sleep_notification *sleep = &(pkt->u.sleep_notif); - D_RX("sleep mode: %d, src: %d\n", - sleep->pm_sleep_mode, sleep->pm_wakeup_src); -#endif -} -EXPORT_SYMBOL(il_hdl_pm_sleep); - -void -il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb) -{ - struct il_rx_pkt *pkt = rxb_addr(rxb); - u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK; - D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len, - il_get_cmd_string(pkt->hdr.cmd)); - il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len); -} -EXPORT_SYMBOL(il_hdl_pm_debug_stats); - -void -il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb) -{ - struct il_rx_pkt *pkt = rxb_addr(rxb); - - IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) " - "seq 0x%04X ser 0x%08X\n", - le32_to_cpu(pkt->u.err_resp.error_type), - il_get_cmd_string(pkt->u.err_resp.cmd_id), - pkt->u.err_resp.cmd_id, - le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num), - le32_to_cpu(pkt->u.err_resp.error_info)); -} -EXPORT_SYMBOL(il_hdl_error); - -void -il_clear_isr_stats(struct il_priv *il) -{ - memset(&il->isr_stats, 0, sizeof(il->isr_stats)); -} - -int -il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue, - const struct ieee80211_tx_queue_params *params) -{ - struct il_priv *il = hw->priv; - unsigned long flags; - int q; - - D_MAC80211("enter\n"); - - if (!il_is_ready_rf(il)) { - D_MAC80211("leave - RF not ready\n"); - return -EIO; - } - - if (queue >= AC_NUM) { - D_MAC80211("leave - queue >= AC_NUM %d\n", queue); - return 0; - } - - q = AC_NUM - 1 - queue; - - spin_lock_irqsave(&il->lock, flags); - - il->qos_data.def_qos_parm.ac[q].cw_min = - cpu_to_le16(params->cw_min); - il->qos_data.def_qos_parm.ac[q].cw_max = - cpu_to_le16(params->cw_max); - il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; - il->qos_data.def_qos_parm.ac[q].edca_txop = - cpu_to_le16((params->txop * 32)); - - il->qos_data.def_qos_parm.ac[q].reserved1 = 0; - - spin_unlock_irqrestore(&il->lock, flags); - - D_MAC80211("leave\n"); - return 0; -} -EXPORT_SYMBOL(il_mac_conf_tx); - -int -il_mac_tx_last_beacon(struct ieee80211_hw *hw) -{ - struct il_priv *il = hw->priv; - int ret; - - D_MAC80211("enter\n"); - - ret = (il->ibss_manager == IL_IBSS_MANAGER); - - D_MAC80211("leave ret %d\n", ret); - return ret; -} -EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon); - -static int -il_set_mode(struct il_priv *il) -{ - il_connection_init_rx_config(il); - - if (il->ops->set_rxon_chain) - il->ops->set_rxon_chain(il); - - return il_commit_rxon(il); -} - -int -il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) -{ - struct il_priv *il = hw->priv; - int err; - bool reset; - - mutex_lock(&il->mutex); - D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr); - - if (!il_is_ready_rf(il)) { - IL_WARN("Try to add interface when device not ready\n"); - err = -EINVAL; - goto out; - } - - /* - * We do not support multiple virtual interfaces, but on hardware reset - * we have to add the same interface again. - */ - reset = (il->vif == vif); - if (il->vif && !reset) { - err = -EOPNOTSUPP; - goto out; - } - - il->vif = vif; - il->iw_mode = vif->type; - - err = il_set_mode(il); - if (err) { - IL_WARN("Fail to set mode %d\n", vif->type); - if (!reset) { - il->vif = NULL; - il->iw_mode = NL80211_IFTYPE_STATION; - } - } - -out: - D_MAC80211("leave err %d\n", err); - mutex_unlock(&il->mutex); - - return err; -} -EXPORT_SYMBOL(il_mac_add_interface); - -static void -il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif) -{ - lockdep_assert_held(&il->mutex); - - if (il->scan_vif == vif) { - il_scan_cancel_timeout(il, 200); - il_force_scan_end(il); - } - - il_set_mode(il); -} - -void -il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) -{ - struct il_priv *il = hw->priv; - - mutex_lock(&il->mutex); - D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr); - - WARN_ON(il->vif != vif); - il->vif = NULL; - il->iw_mode = NL80211_IFTYPE_UNSPECIFIED; - il_teardown_interface(il, vif); - eth_zero_addr(il->bssid); - - D_MAC80211("leave\n"); - mutex_unlock(&il->mutex); -} -EXPORT_SYMBOL(il_mac_remove_interface); - -int -il_alloc_txq_mem(struct il_priv *il) -{ - if (!il->txq) - il->txq = - kzalloc(sizeof(struct il_tx_queue) * - il->cfg->num_of_queues, GFP_KERNEL); - if (!il->txq) { - IL_ERR("Not enough memory for txq\n"); - return -ENOMEM; - } - return 0; -} -EXPORT_SYMBOL(il_alloc_txq_mem); - -void -il_free_txq_mem(struct il_priv *il) -{ - kfree(il->txq); - il->txq = NULL; -} -EXPORT_SYMBOL(il_free_txq_mem); - -int -il_force_reset(struct il_priv *il, bool external) -{ - struct il_force_reset *force_reset; - - if (test_bit(S_EXIT_PENDING, &il->status)) - return -EINVAL; - - force_reset = &il->force_reset; - force_reset->reset_request_count++; - if (!external) { - if (force_reset->last_force_reset_jiffies && - time_after(force_reset->last_force_reset_jiffies + - force_reset->reset_duration, jiffies)) { - D_INFO("force reset rejected\n"); - force_reset->reset_reject_count++; - return -EAGAIN; - } - } - force_reset->reset_success_count++; - force_reset->last_force_reset_jiffies = jiffies; - - /* - * if the request is from external(ex: debugfs), - * then always perform the request in regardless the module - * parameter setting - * if the request is from internal (uCode error or driver - * detect failure), then fw_restart module parameter - * need to be check before performing firmware reload - */ - - if (!external && !il->cfg->mod_params->restart_fw) { - D_INFO("Cancel firmware reload based on " - "module parameter setting\n"); - return 0; - } - - IL_ERR("On demand firmware reload\n"); - - /* Set the FW error flag -- cleared on il_down */ - set_bit(S_FW_ERROR, &il->status); - wake_up(&il->wait_command_queue); - /* - * Keep the restart process from trying to send host - * commands by clearing the INIT status bit - */ - clear_bit(S_READY, &il->status); - queue_work(il->workqueue, &il->restart); - - return 0; -} -EXPORT_SYMBOL(il_force_reset); - -int -il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif, - enum nl80211_iftype newtype, bool newp2p) -{ - struct il_priv *il = hw->priv; - int err; - - mutex_lock(&il->mutex); - D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n", - vif->type, vif->addr, newtype, newp2p); - - if (newp2p) { - err = -EOPNOTSUPP; - goto out; - } - - if (!il->vif || !il_is_ready_rf(il)) { - /* - * Huh? But wait ... this can maybe happen when - * we're in the middle of a firmware restart! - */ - err = -EBUSY; - goto out; - } - - /* success */ - vif->type = newtype; - vif->p2p = false; - il->iw_mode = newtype; - il_teardown_interface(il, vif); - err = 0; - -out: - D_MAC80211("leave err %d\n", err); - mutex_unlock(&il->mutex); - - return err; -} -EXPORT_SYMBOL(il_mac_change_interface); - -void il_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, - u32 queues, bool drop) -{ - struct il_priv *il = hw->priv; - unsigned long timeout = jiffies + msecs_to_jiffies(500); - int i; - - mutex_lock(&il->mutex); - D_MAC80211("enter\n"); - - if (il->txq == NULL) - goto out; - - for (i = 0; i < il->hw_params.max_txq_num; i++) { - struct il_queue *q; - - if (i == il->cmd_queue) - continue; - - q = &il->txq[i].q; - if (q->read_ptr == q->write_ptr) - continue; - - if (time_after(jiffies, timeout)) { - IL_ERR("Failed to flush queue %d\n", q->id); - break; - } - - msleep(20); - } -out: - D_MAC80211("leave\n"); - mutex_unlock(&il->mutex); -} -EXPORT_SYMBOL(il_mac_flush); - -/* - * On every watchdog tick we check (latest) time stamp. If it does not - * change during timeout period and queue is not empty we reset firmware. - */ -static int -il_check_stuck_queue(struct il_priv *il, int cnt) -{ - struct il_tx_queue *txq = &il->txq[cnt]; - struct il_queue *q = &txq->q; - unsigned long timeout; - unsigned long now = jiffies; - int ret; - - if (q->read_ptr == q->write_ptr) { - txq->time_stamp = now; - return 0; - } - - timeout = - txq->time_stamp + - msecs_to_jiffies(il->cfg->wd_timeout); - - if (time_after(now, timeout)) { - IL_ERR("Queue %d stuck for %u ms.\n", q->id, - jiffies_to_msecs(now - txq->time_stamp)); - ret = il_force_reset(il, false); - return (ret == -EAGAIN) ? 0 : 1; - } - - return 0; -} - -/* - * Making watchdog tick be a quarter of timeout assure we will - * discover the queue hung between timeout and 1.25*timeout - */ -#define IL_WD_TICK(timeout) ((timeout) / 4) - -/* - * Watchdog timer callback, we check each tx queue for stuck, if if hung - * we reset the firmware. If everything is fine just rearm the timer. - */ -void -il_bg_watchdog(unsigned long data) -{ - struct il_priv *il = (struct il_priv *)data; - int cnt; - unsigned long timeout; - - if (test_bit(S_EXIT_PENDING, &il->status)) - return; - - timeout = il->cfg->wd_timeout; - if (timeout == 0) - return; - - /* monitor and check for stuck cmd queue */ - if (il_check_stuck_queue(il, il->cmd_queue)) - return; - - /* monitor and check for other stuck queues */ - for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) { - /* skip as we already checked the command queue */ - if (cnt == il->cmd_queue) - continue; - if (il_check_stuck_queue(il, cnt)) - return; - } - - mod_timer(&il->watchdog, - jiffies + msecs_to_jiffies(IL_WD_TICK(timeout))); -} -EXPORT_SYMBOL(il_bg_watchdog); - -void -il_setup_watchdog(struct il_priv *il) -{ - unsigned int timeout = il->cfg->wd_timeout; - - if (timeout) - mod_timer(&il->watchdog, - jiffies + msecs_to_jiffies(IL_WD_TICK(timeout))); - else - del_timer(&il->watchdog); -} -EXPORT_SYMBOL(il_setup_watchdog); - -/* - * extended beacon time format - * time in usec will be changed into a 32-bit value in extended:internal format - * the extended part is the beacon counts - * the internal part is the time in usec within one beacon interval - */ -u32 -il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval) -{ - u32 quot; - u32 rem; - u32 interval = beacon_interval * TIME_UNIT; - - if (!interval || !usec) - return 0; - - quot = - (usec / - interval) & (il_beacon_time_mask_high(il, - il->hw_params. - beacon_time_tsf_bits) >> il-> - hw_params.beacon_time_tsf_bits); - rem = - (usec % interval) & il_beacon_time_mask_low(il, - il->hw_params. - beacon_time_tsf_bits); - - return (quot << il->hw_params.beacon_time_tsf_bits) + rem; -} -EXPORT_SYMBOL(il_usecs_to_beacons); - -/* base is usually what we get from ucode with each received frame, - * the same as HW timer counter counting down - */ -__le32 -il_add_beacon_time(struct il_priv *il, u32 base, u32 addon, - u32 beacon_interval) -{ - u32 base_low = base & il_beacon_time_mask_low(il, - il->hw_params. - beacon_time_tsf_bits); - u32 addon_low = addon & il_beacon_time_mask_low(il, - il->hw_params. - beacon_time_tsf_bits); - u32 interval = beacon_interval * TIME_UNIT; - u32 res = (base & il_beacon_time_mask_high(il, - il->hw_params. - beacon_time_tsf_bits)) + - (addon & il_beacon_time_mask_high(il, - il->hw_params. - beacon_time_tsf_bits)); - - if (base_low > addon_low) - res += base_low - addon_low; - else if (base_low < addon_low) { - res += interval + base_low - addon_low; - res += (1 << il->hw_params.beacon_time_tsf_bits); - } else - res += (1 << il->hw_params.beacon_time_tsf_bits); - - return cpu_to_le32(res); -} -EXPORT_SYMBOL(il_add_beacon_time); - -#ifdef CONFIG_PM_SLEEP - -static int -il_pci_suspend(struct device *device) -{ - struct pci_dev *pdev = to_pci_dev(device); - struct il_priv *il = pci_get_drvdata(pdev); - - /* - * This function is called when system goes into suspend state - * mac80211 will call il_mac_stop() from the mac80211 suspend function - * first but since il_mac_stop() has no knowledge of who the caller is, - * it will not call apm_ops.stop() to stop the DMA operation. - * Calling apm_ops.stop here to make sure we stop the DMA. - */ - il_apm_stop(il); - - return 0; -} - -static int -il_pci_resume(struct device *device) -{ - struct pci_dev *pdev = to_pci_dev(device); - struct il_priv *il = pci_get_drvdata(pdev); - bool hw_rfkill = false; - - /* - * We disable the RETRY_TIMEOUT register (0x41) to keep - * PCI Tx retries from interfering with C3 CPU state. - */ - pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); - - il_enable_interrupts(il); - - if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) - hw_rfkill = true; - - if (hw_rfkill) - set_bit(S_RFKILL, &il->status); - else - clear_bit(S_RFKILL, &il->status); - - wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill); - - return 0; -} - -SIMPLE_DEV_PM_OPS(il_pm_ops, il_pci_suspend, il_pci_resume); -EXPORT_SYMBOL(il_pm_ops); - -#endif /* CONFIG_PM_SLEEP */ - -static void -il_update_qos(struct il_priv *il) -{ - if (test_bit(S_EXIT_PENDING, &il->status)) - return; - - il->qos_data.def_qos_parm.qos_flags = 0; - - if (il->qos_data.qos_active) - il->qos_data.def_qos_parm.qos_flags |= - QOS_PARAM_FLG_UPDATE_EDCA_MSK; - - if (il->ht.enabled) - il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK; - - D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n", - il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags); - - il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd), - &il->qos_data.def_qos_parm, NULL); -} - -/** - * il_mac_config - mac80211 config callback - */ -int -il_mac_config(struct ieee80211_hw *hw, u32 changed) -{ - struct il_priv *il = hw->priv; - const struct il_channel_info *ch_info; - struct ieee80211_conf *conf = &hw->conf; - struct ieee80211_channel *channel = conf->chandef.chan; - struct il_ht_config *ht_conf = &il->current_ht_config; - unsigned long flags = 0; - int ret = 0; - u16 ch; - int scan_active = 0; - bool ht_changed = false; - - mutex_lock(&il->mutex); - D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value, - changed); - - if (unlikely(test_bit(S_SCANNING, &il->status))) { - scan_active = 1; - D_MAC80211("scan active\n"); - } - - if (changed & - (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) { - /* mac80211 uses static for non-HT which is what we want */ - il->current_ht_config.smps = conf->smps_mode; - - /* - * Recalculate chain counts. - * - * If monitor mode is enabled then mac80211 will - * set up the SM PS mode to OFF if an HT channel is - * configured. - */ - if (il->ops->set_rxon_chain) - il->ops->set_rxon_chain(il); - } - - /* during scanning mac80211 will delay channel setting until - * scan finish with changed = 0 - */ - if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) { - - if (scan_active) - goto set_ch_out; - - ch = channel->hw_value; - ch_info = il_get_channel_info(il, channel->band, ch); - if (!il_is_channel_valid(ch_info)) { - D_MAC80211("leave - invalid channel\n"); - ret = -EINVAL; - goto set_ch_out; - } - - if (il->iw_mode == NL80211_IFTYPE_ADHOC && - !il_is_channel_ibss(ch_info)) { - D_MAC80211("leave - not IBSS channel\n"); - ret = -EINVAL; - goto set_ch_out; - } - - spin_lock_irqsave(&il->lock, flags); - - /* Configure HT40 channels */ - if (il->ht.enabled != conf_is_ht(conf)) { - il->ht.enabled = conf_is_ht(conf); - ht_changed = true; - } - if (il->ht.enabled) { - if (conf_is_ht40_minus(conf)) { - il->ht.extension_chan_offset = - IEEE80211_HT_PARAM_CHA_SEC_BELOW; - il->ht.is_40mhz = true; - } else if (conf_is_ht40_plus(conf)) { - il->ht.extension_chan_offset = - IEEE80211_HT_PARAM_CHA_SEC_ABOVE; - il->ht.is_40mhz = true; - } else { - il->ht.extension_chan_offset = - IEEE80211_HT_PARAM_CHA_SEC_NONE; - il->ht.is_40mhz = false; - } - } else - il->ht.is_40mhz = false; - - /* - * Default to no protection. Protection mode will - * later be set from BSS config in il_ht_conf - */ - il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE; - - /* if we are switching from ht to 2.4 clear flags - * from any ht related info since 2.4 does not - * support ht */ - if ((le16_to_cpu(il->staging.channel) != ch)) - il->staging.flags = 0; - - il_set_rxon_channel(il, channel); - il_set_rxon_ht(il, ht_conf); - - il_set_flags_for_band(il, channel->band, il->vif); - - spin_unlock_irqrestore(&il->lock, flags); - - if (il->ops->update_bcast_stations) - ret = il->ops->update_bcast_stations(il); - -set_ch_out: - /* The list of supported rates and rate mask can be different - * for each band; since the band may have changed, reset - * the rate mask to what mac80211 lists */ - il_set_rate(il); - } - - if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) { - il->power_data.ps_disabled = !(conf->flags & IEEE80211_CONF_PS); - ret = il_power_update_mode(il, false); - if (ret) - D_MAC80211("Error setting sleep level\n"); - } - - if (changed & IEEE80211_CONF_CHANGE_POWER) { - D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt, - conf->power_level); - - il_set_tx_power(il, conf->power_level, false); - } - - if (!il_is_ready(il)) { - D_MAC80211("leave - not ready\n"); - goto out; - } - - if (scan_active) - goto out; - - if (memcmp(&il->active, &il->staging, sizeof(il->staging))) - il_commit_rxon(il); - else - D_INFO("Not re-sending same RXON configuration.\n"); - if (ht_changed) - il_update_qos(il); - -out: - D_MAC80211("leave ret %d\n", ret); - mutex_unlock(&il->mutex); - - return ret; -} -EXPORT_SYMBOL(il_mac_config); - -void -il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) -{ - struct il_priv *il = hw->priv; - unsigned long flags; - - mutex_lock(&il->mutex); - D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr); - - spin_lock_irqsave(&il->lock, flags); - - memset(&il->current_ht_config, 0, sizeof(struct il_ht_config)); - - /* new association get rid of ibss beacon skb */ - if (il->beacon_skb) - dev_kfree_skb(il->beacon_skb); - il->beacon_skb = NULL; - il->timestamp = 0; - - spin_unlock_irqrestore(&il->lock, flags); - - il_scan_cancel_timeout(il, 100); - if (!il_is_ready_rf(il)) { - D_MAC80211("leave - not ready\n"); - mutex_unlock(&il->mutex); - return; - } - - /* we are restarting association process */ - il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK; - il_commit_rxon(il); - - il_set_rate(il); - - D_MAC80211("leave\n"); - mutex_unlock(&il->mutex); -} -EXPORT_SYMBOL(il_mac_reset_tsf); - -static void -il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif) -{ - struct il_ht_config *ht_conf = &il->current_ht_config; - struct ieee80211_sta *sta; - struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; - - D_ASSOC("enter:\n"); - - if (!il->ht.enabled) - return; - - il->ht.protection = - bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION; - il->ht.non_gf_sta_present = - !!(bss_conf-> - ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT); - - ht_conf->single_chain_sufficient = false; - - switch (vif->type) { - case NL80211_IFTYPE_STATION: - rcu_read_lock(); - sta = ieee80211_find_sta(vif, bss_conf->bssid); - if (sta) { - struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; - int maxstreams; - - maxstreams = - (ht_cap->mcs. - tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) - >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; - maxstreams += 1; - - if (ht_cap->mcs.rx_mask[1] == 0 && - ht_cap->mcs.rx_mask[2] == 0) - ht_conf->single_chain_sufficient = true; - if (maxstreams <= 1) - ht_conf->single_chain_sufficient = true; - } else { - /* - * If at all, this can only happen through a race - * when the AP disconnects us while we're still - * setting up the connection, in that case mac80211 - * will soon tell us about that. - */ - ht_conf->single_chain_sufficient = true; - } - rcu_read_unlock(); - break; - case NL80211_IFTYPE_ADHOC: - ht_conf->single_chain_sufficient = true; - break; - default: - break; - } - - D_ASSOC("leave\n"); -} - -static inline void -il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif) -{ - /* - * inform the ucode that there is no longer an - * association and that no more packets should be - * sent - */ - il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK; - il->staging.assoc_id = 0; - il_commit_rxon(il); -} - -static void -il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif) -{ - struct il_priv *il = hw->priv; - unsigned long flags; - __le64 timestamp; - struct sk_buff *skb = ieee80211_beacon_get(hw, vif); - - if (!skb) - return; - - D_MAC80211("enter\n"); - - lockdep_assert_held(&il->mutex); - - if (!il->beacon_enabled) { - IL_ERR("update beacon with no beaconing enabled\n"); - dev_kfree_skb(skb); - return; - } - - spin_lock_irqsave(&il->lock, flags); - - if (il->beacon_skb) - dev_kfree_skb(il->beacon_skb); - - il->beacon_skb = skb; - - timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp; - il->timestamp = le64_to_cpu(timestamp); - - D_MAC80211("leave\n"); - spin_unlock_irqrestore(&il->lock, flags); - - if (!il_is_ready_rf(il)) { - D_MAC80211("leave - RF not ready\n"); - return; - } - - il->ops->post_associate(il); -} - -void -il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, - struct ieee80211_bss_conf *bss_conf, u32 changes) -{ - struct il_priv *il = hw->priv; - int ret; - - mutex_lock(&il->mutex); - D_MAC80211("enter: changes 0x%x\n", changes); - - if (!il_is_alive(il)) { - D_MAC80211("leave - not alive\n"); - mutex_unlock(&il->mutex); - return; - } - - if (changes & BSS_CHANGED_QOS) { - unsigned long flags; - - spin_lock_irqsave(&il->lock, flags); - il->qos_data.qos_active = bss_conf->qos; - il_update_qos(il); - spin_unlock_irqrestore(&il->lock, flags); - } - - if (changes & BSS_CHANGED_BEACON_ENABLED) { - /* FIXME: can we remove beacon_enabled ? */ - if (vif->bss_conf.enable_beacon) - il->beacon_enabled = true; - else - il->beacon_enabled = false; - } - - if (changes & BSS_CHANGED_BSSID) { - D_MAC80211("BSSID %pM\n", bss_conf->bssid); - - /* - * On passive channel we wait with blocked queues to see if - * there is traffic on that channel. If no frame will be - * received (what is very unlikely since scan detects AP on - * that channel, but theoretically possible), mac80211 associate - * procedure will time out and mac80211 will call us with NULL - * bssid. We have to unblock queues on such condition. - */ - if (is_zero_ether_addr(bss_conf->bssid)) - il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE); - - /* - * If there is currently a HW scan going on in the background, - * then we need to cancel it, otherwise sometimes we are not - * able to authenticate (FIXME: why ?) - */ - if (il_scan_cancel_timeout(il, 100)) { - D_MAC80211("leave - scan abort failed\n"); - mutex_unlock(&il->mutex); - return; - } - - /* mac80211 only sets assoc when in STATION mode */ - memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN); - - /* FIXME: currently needed in a few places */ - memcpy(il->bssid, bss_conf->bssid, ETH_ALEN); - } - - /* - * This needs to be after setting the BSSID in case - * mac80211 decides to do both changes at once because - * it will invoke post_associate. - */ - if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON)) - il_beacon_update(hw, vif); - - if (changes & BSS_CHANGED_ERP_PREAMBLE) { - D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble); - if (bss_conf->use_short_preamble) - il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; - else - il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; - } - - if (changes & BSS_CHANGED_ERP_CTS_PROT) { - D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot); - if (bss_conf->use_cts_prot && il->band != IEEE80211_BAND_5GHZ) - il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK; - else - il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK; - if (bss_conf->use_cts_prot) - il->staging.flags |= RXON_FLG_SELF_CTS_EN; - else - il->staging.flags &= ~RXON_FLG_SELF_CTS_EN; - } - - if (changes & BSS_CHANGED_BASIC_RATES) { - /* XXX use this information - * - * To do that, remove code from il_set_rate() and put something - * like this here: - * - if (A-band) - il->staging.ofdm_basic_rates = - bss_conf->basic_rates; - else - il->staging.ofdm_basic_rates = - bss_conf->basic_rates >> 4; - il->staging.cck_basic_rates = - bss_conf->basic_rates & 0xF; - */ - } - - if (changes & BSS_CHANGED_HT) { - il_ht_conf(il, vif); - - if (il->ops->set_rxon_chain) - il->ops->set_rxon_chain(il); - } - - if (changes & BSS_CHANGED_ASSOC) { - D_MAC80211("ASSOC %d\n", bss_conf->assoc); - if (bss_conf->assoc) { - il->timestamp = bss_conf->sync_tsf; - - if (!il_is_rfkill(il)) - il->ops->post_associate(il); - } else - il_set_no_assoc(il, vif); - } - - if (changes && il_is_associated(il) && bss_conf->aid) { - D_MAC80211("Changes (%#x) while associated\n", changes); - ret = il_send_rxon_assoc(il); - if (!ret) { - /* Sync active_rxon with latest change. */ - memcpy((void *)&il->active, &il->staging, - sizeof(struct il_rxon_cmd)); - } - } - - if (changes & BSS_CHANGED_BEACON_ENABLED) { - if (vif->bss_conf.enable_beacon) { - memcpy(il->staging.bssid_addr, bss_conf->bssid, - ETH_ALEN); - memcpy(il->bssid, bss_conf->bssid, ETH_ALEN); - il->ops->config_ap(il); - } else - il_set_no_assoc(il, vif); - } - - if (changes & BSS_CHANGED_IBSS) { - ret = il->ops->manage_ibss_station(il, vif, - bss_conf->ibss_joined); - if (ret) - IL_ERR("failed to %s IBSS station %pM\n", - bss_conf->ibss_joined ? "add" : "remove", - bss_conf->bssid); - } - - D_MAC80211("leave\n"); - mutex_unlock(&il->mutex); -} -EXPORT_SYMBOL(il_mac_bss_info_changed); - -irqreturn_t -il_isr(int irq, void *data) -{ - struct il_priv *il = data; - u32 inta, inta_mask; - u32 inta_fh; - unsigned long flags; - if (!il) - return IRQ_NONE; - - spin_lock_irqsave(&il->lock, flags); - - /* Disable (but don't clear!) interrupts here to avoid - * back-to-back ISRs and sporadic interrupts from our NIC. - * If we have something to service, the tasklet will re-enable ints. - * If we *don't* have something, we'll re-enable before leaving here. */ - inta_mask = _il_rd(il, CSR_INT_MASK); /* just for debug */ - _il_wr(il, CSR_INT_MASK, 0x00000000); - - /* Discover which interrupts are active/pending */ - inta = _il_rd(il, CSR_INT); - inta_fh = _il_rd(il, CSR_FH_INT_STATUS); - - /* Ignore interrupt if there's nothing in NIC to service. - * This may be due to IRQ shared with another device, - * or due to sporadic interrupts thrown from our NIC. */ - if (!inta && !inta_fh) { - D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n"); - goto none; - } - - if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) { - /* Hardware disappeared. It might have already raised - * an interrupt */ - IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta); - goto unplugged; - } - - D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask, - inta_fh); - - inta &= ~CSR_INT_BIT_SCD; - - /* il_irq_tasklet() will service interrupts and re-enable them */ - if (likely(inta || inta_fh)) - tasklet_schedule(&il->irq_tasklet); - -unplugged: - spin_unlock_irqrestore(&il->lock, flags); - return IRQ_HANDLED; - -none: - /* re-enable interrupts here since we don't have anything to service. */ - /* only Re-enable if disabled by irq */ - if (test_bit(S_INT_ENABLED, &il->status)) - il_enable_interrupts(il); - spin_unlock_irqrestore(&il->lock, flags); - return IRQ_NONE; -} -EXPORT_SYMBOL(il_isr); - -/* - * il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this - * function. - */ -void -il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info, - __le16 fc, __le32 *tx_flags) -{ - if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) { - *tx_flags |= TX_CMD_FLG_RTS_MSK; - *tx_flags &= ~TX_CMD_FLG_CTS_MSK; - *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK; - - if (!ieee80211_is_mgmt(fc)) - return; - - switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) { - case cpu_to_le16(IEEE80211_STYPE_AUTH): - case cpu_to_le16(IEEE80211_STYPE_DEAUTH): - case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ): - case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ): - *tx_flags &= ~TX_CMD_FLG_RTS_MSK; - *tx_flags |= TX_CMD_FLG_CTS_MSK; - break; - } - } else if (info->control.rates[0]. - flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { - *tx_flags &= ~TX_CMD_FLG_RTS_MSK; - *tx_flags |= TX_CMD_FLG_CTS_MSK; - *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK; - } -} -EXPORT_SYMBOL(il_tx_cmd_protection); |