diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/acpi/Makefile | 1 | ||||
| -rw-r--r-- | drivers/acpi/acpi_cmos_rtc.c | 2 | ||||
| -rw-r--r-- | drivers/acpi/button.c | 4 | ||||
| -rw-r--r-- | drivers/acpi/ec.c | 41 | ||||
| -rw-r--r-- | drivers/acpi/osl.c | 5 | ||||
| -rw-r--r-- | drivers/acpi/pci_mcfg.c | 92 | ||||
| -rw-r--r-- | drivers/acpi/pci_root.c | 35 | ||||
| -rw-r--r-- | drivers/acpi/processor_driver.c | 11 |
9 files changed, 181 insertions, 13 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index aebd944bdaa1..445ce28475b3 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -221,6 +221,9 @@ config ACPI_PROCESSOR_IDLE bool select CPU_IDLE +config ACPI_MCFG + bool + config ACPI_CPPC_LIB bool depends on ACPI_PROCESSOR diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index 35a6ccbe3025..5ae9d85c5159 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -40,6 +40,7 @@ acpi-$(CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC) += processor_pdc.o acpi-y += ec.o acpi-$(CONFIG_ACPI_DOCK) += dock.o acpi-y += pci_root.o pci_link.o pci_irq.o +obj-$(CONFIG_ACPI_MCFG) += pci_mcfg.o acpi-y += acpi_lpss.o acpi_apd.o acpi-y += acpi_platform.o acpi-y += acpi_pnp.o diff --git a/drivers/acpi/acpi_cmos_rtc.c b/drivers/acpi/acpi_cmos_rtc.c index 81dc75033f15..0980a133916f 100644 --- a/drivers/acpi/acpi_cmos_rtc.c +++ b/drivers/acpi/acpi_cmos_rtc.c @@ -14,7 +14,7 @@ #include <linux/err.h> #include <linux/kernel.h> #include <linux/module.h> -#include <asm-generic/rtc.h> +#include <linux/mc146818rtc.h> #include "internal.h" diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c index 148f4e5ca104..31abb0bdd4f2 100644 --- a/drivers/acpi/button.c +++ b/drivers/acpi/button.c @@ -232,8 +232,10 @@ remove_dev_dir: acpi_device_dir(device) = NULL; remove_lid_dir: remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); + acpi_lid_dir = NULL; remove_button_dir: remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); + acpi_button_dir = NULL; goto done; } @@ -250,7 +252,9 @@ static int acpi_button_remove_fs(struct acpi_device *device) acpi_lid_dir); acpi_device_dir(device) = NULL; remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); + acpi_lid_dir = NULL; remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); + acpi_button_dir = NULL; return 0; } diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 999a10914678..e7bd57cc550a 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -101,6 +101,7 @@ enum ec_command { #define ACPI_EC_UDELAY_POLL 550 /* Wait 1ms for EC transaction polling */ #define ACPI_EC_CLEAR_MAX 100 /* Maximum number of events to query * when trying to clear the EC */ +#define ACPI_EC_MAX_QUERIES 16 /* Maximum number of parallel queries */ enum { EC_FLAGS_QUERY_PENDING, /* Query is pending */ @@ -121,6 +122,10 @@ static unsigned int ec_delay __read_mostly = ACPI_EC_DELAY; module_param(ec_delay, uint, 0644); MODULE_PARM_DESC(ec_delay, "Timeout(ms) waited until an EC command completes"); +static unsigned int ec_max_queries __read_mostly = ACPI_EC_MAX_QUERIES; +module_param(ec_max_queries, uint, 0644); +MODULE_PARM_DESC(ec_max_queries, "Maximum parallel _Qxx evaluations"); + static bool ec_busy_polling __read_mostly; module_param(ec_busy_polling, bool, 0644); MODULE_PARM_DESC(ec_busy_polling, "Use busy polling to advance EC transaction"); @@ -174,6 +179,7 @@ static void acpi_ec_event_processor(struct work_struct *work); struct acpi_ec *boot_ec, *first_ec; EXPORT_SYMBOL(first_ec); +static struct workqueue_struct *ec_query_wq; static int EC_FLAGS_CLEAR_ON_RESUME; /* Needs acpi_ec_clear() on boot/resume */ static int EC_FLAGS_QUERY_HANDSHAKE; /* Needs QR_EC issued when SCI_EVT set */ @@ -1098,7 +1104,7 @@ static int acpi_ec_query(struct acpi_ec *ec, u8 *data) * work queue execution. */ ec_dbg_evt("Query(0x%02x) scheduled", value); - if (!schedule_work(&q->work)) { + if (!queue_work(ec_query_wq, &q->work)) { ec_dbg_evt("Query(0x%02x) overlapped", value); result = -EBUSY; } @@ -1660,15 +1666,41 @@ static struct acpi_driver acpi_ec_driver = { }, }; +static inline int acpi_ec_query_init(void) +{ + if (!ec_query_wq) { + ec_query_wq = alloc_workqueue("kec_query", 0, + ec_max_queries); + if (!ec_query_wq) + return -ENODEV; + } + return 0; +} + +static inline void acpi_ec_query_exit(void) +{ + if (ec_query_wq) { + destroy_workqueue(ec_query_wq); + ec_query_wq = NULL; + } +} + int __init acpi_ec_init(void) { - int result = 0; + int result; + /* register workqueue for _Qxx evaluations */ + result = acpi_ec_query_init(); + if (result) + goto err_exit; /* Now register the driver for the EC */ result = acpi_bus_register_driver(&acpi_ec_driver); - if (result < 0) - return -ENODEV; + if (result) + goto err_exit; +err_exit: + if (result) + acpi_ec_query_exit(); return result; } @@ -1678,5 +1710,6 @@ static void __exit acpi_ec_exit(void) { acpi_bus_unregister_driver(&acpi_ec_driver); + acpi_ec_query_exit(); } #endif /* 0 */ diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index b108f1358a32..4305ee9db4b2 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -309,7 +309,7 @@ static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) * During early init (when acpi_gbl_permanent_mmap has not been set yet) this * routine simply calls __acpi_map_table() to get the job done. */ -void __iomem *__init_refok +void __iomem *__ref acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) { struct acpi_ioremap *map; @@ -362,8 +362,7 @@ out: } EXPORT_SYMBOL_GPL(acpi_os_map_iomem); -void *__init_refok -acpi_os_map_memory(acpi_physical_address phys, acpi_size size) +void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size) { return (void *)acpi_os_map_iomem(phys, size); } diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c new file mode 100644 index 000000000000..b5b376e081f5 --- /dev/null +++ b/drivers/acpi/pci_mcfg.c @@ -0,0 +1,92 @@ +/* + * Copyright (C) 2016 Broadcom + * Author: Jayachandran C <jchandra@broadcom.com> + * Copyright (C) 2016 Semihalf + * Author: Tomasz Nowicki <tn@semihalf.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation (the "GPL"). + * + * 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 version 2 (GPLv2) for more details. + * + * You should have received a copy of the GNU General Public License + * version 2 (GPLv2) along with this source code. + */ + +#define pr_fmt(fmt) "ACPI: " fmt + +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/pci-acpi.h> + +/* Structure to hold entries from the MCFG table */ +struct mcfg_entry { + struct list_head list; + phys_addr_t addr; + u16 segment; + u8 bus_start; + u8 bus_end; +}; + +/* List to save MCFG entries */ +static LIST_HEAD(pci_mcfg_list); + +phys_addr_t pci_mcfg_lookup(u16 seg, struct resource *bus_res) +{ + struct mcfg_entry *e; + + /* + * We expect exact match, unless MCFG entry end bus covers more than + * specified by caller. + */ + list_for_each_entry(e, &pci_mcfg_list, list) { + if (e->segment == seg && e->bus_start == bus_res->start && + e->bus_end >= bus_res->end) + return e->addr; + } + + return 0; +} + +static __init int pci_mcfg_parse(struct acpi_table_header *header) +{ + struct acpi_table_mcfg *mcfg; + struct acpi_mcfg_allocation *mptr; + struct mcfg_entry *e, *arr; + int i, n; + + if (header->length < sizeof(struct acpi_table_mcfg)) + return -EINVAL; + + n = (header->length - sizeof(struct acpi_table_mcfg)) / + sizeof(struct acpi_mcfg_allocation); + mcfg = (struct acpi_table_mcfg *)header; + mptr = (struct acpi_mcfg_allocation *) &mcfg[1]; + + arr = kcalloc(n, sizeof(*arr), GFP_KERNEL); + if (!arr) + return -ENOMEM; + + for (i = 0, e = arr; i < n; i++, mptr++, e++) { + e->segment = mptr->pci_segment; + e->addr = mptr->address; + e->bus_start = mptr->start_bus_number; + e->bus_end = mptr->end_bus_number; + list_add(&e->list, &pci_mcfg_list); + } + + pr_info("MCFG table detected, %d entries\n", n); + return 0; +} + +/* Interface called by ACPI - parse and save MCFG table */ +void __init pci_mmcfg_late_init(void) +{ + int err = acpi_table_parse(ACPI_SIG_MCFG, pci_mcfg_parse); + if (err) + pr_err("Failed to parse MCFG (%d)\n", err); +} diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index ae3fe4e64203..d144168d4ef9 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -720,6 +720,36 @@ next: } } +static void acpi_pci_root_remap_iospace(struct resource_entry *entry) +{ +#ifdef PCI_IOBASE + struct resource *res = entry->res; + resource_size_t cpu_addr = res->start; + resource_size_t pci_addr = cpu_addr - entry->offset; + resource_size_t length = resource_size(res); + unsigned long port; + + if (pci_register_io_range(cpu_addr, length)) + goto err; + + port = pci_address_to_pio(cpu_addr); + if (port == (unsigned long)-1) + goto err; + + res->start = port; + res->end = port + length - 1; + entry->offset = port - pci_addr; + + if (pci_remap_iospace(res, cpu_addr) < 0) + goto err; + + pr_info("Remapped I/O %pa to %pR\n", &cpu_addr, res); + return; +err: + res->flags |= IORESOURCE_DISABLED; +#endif +} + int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info) { int ret; @@ -740,6 +770,9 @@ int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info) "no IO and memory resources present in _CRS\n"); else { resource_list_for_each_entry_safe(entry, tmp, list) { + if (entry->res->flags & IORESOURCE_IO) + acpi_pci_root_remap_iospace(entry); + if (entry->res->flags & IORESOURCE_DISABLED) resource_list_destroy_entry(entry); else @@ -811,6 +844,8 @@ static void acpi_pci_root_release_info(struct pci_host_bridge *bridge) resource_list_for_each_entry(entry, &bridge->windows) { res = entry->res; + if (res->flags & IORESOURCE_IO) + pci_unmap_iospace(res); if (res->parent && (res->flags & (IORESOURCE_MEM | IORESOURCE_IO))) release_resource(res); diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index 0ca14ac7bb28..0553aeebb228 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -118,12 +118,13 @@ static int acpi_cpu_soft_notify(struct notifier_block *nfb, struct acpi_device *device; action &= ~CPU_TASKS_FROZEN; - /* - * CPU_STARTING and CPU_DYING must not sleep. Return here since - * acpi_bus_get_device() may sleep. - */ - if (action == CPU_STARTING || action == CPU_DYING) + switch (action) { + case CPU_ONLINE: + case CPU_DEAD: + break; + default: return NOTIFY_DONE; + } if (!pr || acpi_bus_get_device(pr->handle, &device)) return NOTIFY_DONE; |