Merge net-next/main to resolve conflicts

The wireless-next tree was based on something older, and there
are now conflicts between -rc2 and work here. Merge net-next,
which has enough of -rc2 for the conflicts to happen, resolving
them in the process.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 117 insertions, 16 deletions

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 6f953e32d990..ef44a82be058 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -35,6 +35,7 @@
 
 #include "../../pci.h"
 #include "pcie-designware.h"
+#include "pcie-qcom-common.h"
 
 /* PARF registers */
 #define PARF_SYS_CTRL				0x00
@@ -45,15 +46,24 @@
 #define PARF_PHY_REFCLK				0x4c
 #define PARF_CONFIG_BITS			0x50
 #define PARF_DBI_BASE_ADDR			0x168
+#define PARF_SLV_ADDR_SPACE_SIZE		0x16c
 #define PARF_MHI_CLOCK_RESET_CTRL		0x174
 #define PARF_AXI_MSTR_WR_ADDR_HALT		0x178
 #define PARF_AXI_MSTR_WR_ADDR_HALT_V2		0x1a8
 #define PARF_Q2A_FLUSH				0x1ac
 #define PARF_LTSSM				0x1b0
+#define PARF_INT_ALL_STATUS			0x224
+#define PARF_INT_ALL_CLEAR			0x228
+#define PARF_INT_ALL_MASK			0x22c
 #define PARF_SID_OFFSET				0x234
 #define PARF_BDF_TRANSLATE_CFG			0x24c
-#define PARF_SLV_ADDR_SPACE_SIZE		0x358
+#define PARF_DBI_BASE_ADDR_V2			0x350
+#define PARF_DBI_BASE_ADDR_V2_HI		0x354
+#define PARF_SLV_ADDR_SPACE_SIZE_V2		0x358
+#define PARF_SLV_ADDR_SPACE_SIZE_V2_HI		0x35c
 #define PARF_NO_SNOOP_OVERIDE			0x3d4
+#define PARF_ATU_BASE_ADDR			0x634
+#define PARF_ATU_BASE_ADDR_HI			0x638
 #define PARF_DEVICE_TYPE			0x1000
 #define PARF_BDF_TO_SID_TABLE_N			0x2000
 #define PARF_BDF_TO_SID_CFG			0x2c00
@@ -108,7 +118,7 @@
 #define PHY_RX0_EQ(x)				FIELD_PREP(GENMASK(26, 24), x)
 
 /* PARF_SLV_ADDR_SPACE_SIZE register value */
-#define SLV_ADDR_SPACE_SZ			0x10000000
+#define SLV_ADDR_SPACE_SZ			0x80000000
 
 /* PARF_MHI_CLOCK_RESET_CTRL register fields */
 #define AHB_CLK_EN				BIT(0)
@@ -121,6 +131,9 @@
 /* PARF_LTSSM register fields */
 #define LTSSM_EN				BIT(8)
 
+/* PARF_INT_ALL_{STATUS/CLEAR/MASK} register fields */
+#define PARF_INT_ALL_LINK_UP			BIT(13)
+
 /* PARF_NO_SNOOP_OVERIDE register fields */
 #define WR_NO_SNOOP_OVERIDE_EN			BIT(1)
 #define RD_NO_SNOOP_OVERIDE_EN			BIT(3)
@@ -284,6 +297,11 @@ static int qcom_pcie_start_link(struct dw_pcie *pci)
 {
 	struct qcom_pcie *pcie = to_qcom_pcie(pci);
 
+	if (pcie_link_speed[pci->max_link_speed] == PCIE_SPEED_16_0GT) {
+		qcom_pcie_common_set_16gt_equalization(pci);
+		qcom_pcie_common_set_16gt_lane_margining(pci);
+	}
+
 	/* Enable Link Training state machine */
 	if (pcie->cfg->ops->ltssm_enable)
 		pcie->cfg->ops->ltssm_enable(pcie);
@@ -325,6 +343,50 @@ static void qcom_pcie_clear_hpc(struct dw_pcie *pci)
 	dw_pcie_dbi_ro_wr_dis(pci);
 }
 
+static void qcom_pcie_configure_dbi_base(struct qcom_pcie *pcie)
+{
+	struct dw_pcie *pci = pcie->pci;
+
+	if (pci->dbi_phys_addr) {
+		/*
+		 * PARF_DBI_BASE_ADDR register is in CPU domain and require to
+		 * be programmed with CPU physical address.
+		 */
+		writel(lower_32_bits(pci->dbi_phys_addr), pcie->parf +
+							PARF_DBI_BASE_ADDR);
+		writel(SLV_ADDR_SPACE_SZ, pcie->parf +
+						PARF_SLV_ADDR_SPACE_SIZE);
+	}
+}
+
+static void qcom_pcie_configure_dbi_atu_base(struct qcom_pcie *pcie)
+{
+	struct dw_pcie *pci = pcie->pci;
+
+	if (pci->dbi_phys_addr) {
+		/*
+		 * PARF_DBI_BASE_ADDR_V2 and PARF_ATU_BASE_ADDR registers are
+		 * in CPU domain and require to be programmed with CPU
+		 * physical addresses.
+		 */
+		writel(lower_32_bits(pci->dbi_phys_addr), pcie->parf +
+							PARF_DBI_BASE_ADDR_V2);
+		writel(upper_32_bits(pci->dbi_phys_addr), pcie->parf +
+						PARF_DBI_BASE_ADDR_V2_HI);
+
+		if (pci->atu_phys_addr) {
+			writel(lower_32_bits(pci->atu_phys_addr), pcie->parf +
+							PARF_ATU_BASE_ADDR);
+			writel(upper_32_bits(pci->atu_phys_addr), pcie->parf +
+							PARF_ATU_BASE_ADDR_HI);
+		}
+
+		writel(0x0, pcie->parf + PARF_SLV_ADDR_SPACE_SIZE_V2);
+		writel(SLV_ADDR_SPACE_SZ, pcie->parf +
+					PARF_SLV_ADDR_SPACE_SIZE_V2_HI);
+	}
+}
+
 static void qcom_pcie_2_1_0_ltssm_enable(struct qcom_pcie *pcie)
 {
 	u32 val;
@@ -541,8 +603,7 @@ err_assert_reset:
 
 static int qcom_pcie_post_init_1_0_0(struct qcom_pcie *pcie)
 {
-	/* change DBI base address */
-	writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
+	qcom_pcie_configure_dbi_base(pcie);
 
 	if (IS_ENABLED(CONFIG_PCI_MSI)) {
 		u32 val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT);
@@ -629,8 +690,7 @@ static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie)
 	val &= ~PHY_TEST_PWR_DOWN;
 	writel(val, pcie->parf + PARF_PHY_CTRL);
 
-	/* change DBI base address */
-	writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
+	qcom_pcie_configure_dbi_base(pcie);
 
 	/* MAC PHY_POWERDOWN MUX DISABLE  */
 	val = readl(pcie->parf + PARF_SYS_CTRL);
@@ -812,13 +872,11 @@ static int qcom_pcie_post_init_2_3_3(struct qcom_pcie *pcie)
 	u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
 	u32 val;
 
-	writel(SLV_ADDR_SPACE_SZ, pcie->parf + PARF_SLV_ADDR_SPACE_SIZE);
-
 	val = readl(pcie->parf + PARF_PHY_CTRL);
 	val &= ~PHY_TEST_PWR_DOWN;
 	writel(val, pcie->parf + PARF_PHY_CTRL);
 
-	writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
+	qcom_pcie_configure_dbi_atu_base(pcie);
 
 	writel(MST_WAKEUP_EN | SLV_WAKEUP_EN | MSTR_ACLK_CGC_DIS
 		| SLV_ACLK_CGC_DIS | CORE_CLK_CGC_DIS |
@@ -914,8 +972,7 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
 	val &= ~PHY_TEST_PWR_DOWN;
 	writel(val, pcie->parf + PARF_PHY_CTRL);
 
-	/* change DBI base address */
-	writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
+	qcom_pcie_configure_dbi_atu_base(pcie);
 
 	/* MAC PHY_POWERDOWN MUX DISABLE  */
 	val = readl(pcie->parf + PARF_SYS_CTRL);
@@ -1124,14 +1181,11 @@ static int qcom_pcie_post_init_2_9_0(struct qcom_pcie *pcie)
 	u32 val;
 	int i;
 
-	writel(SLV_ADDR_SPACE_SZ,
-		pcie->parf + PARF_SLV_ADDR_SPACE_SIZE);
-
 	val = readl(pcie->parf + PARF_PHY_CTRL);
 	val &= ~PHY_TEST_PWR_DOWN;
 	writel(val, pcie->parf + PARF_PHY_CTRL);
 
-	writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
+	qcom_pcie_configure_dbi_atu_base(pcie);
 
 	writel(DEVICE_TYPE_RC, pcie->parf + PARF_DEVICE_TYPE);
 	writel(BYPASS | MSTR_AXI_CLK_EN | AHB_CLK_EN,
@@ -1489,6 +1543,29 @@ static void qcom_pcie_init_debugfs(struct qcom_pcie *pcie)
 				    qcom_pcie_link_transition_count);
 }
 
+static irqreturn_t qcom_pcie_global_irq_thread(int irq, void *data)
+{
+	struct qcom_pcie *pcie = data;
+	struct dw_pcie_rp *pp = &pcie->pci->pp;
+	struct device *dev = pcie->pci->dev;
+	u32 status = readl_relaxed(pcie->parf + PARF_INT_ALL_STATUS);
+
+	writel_relaxed(status, pcie->parf + PARF_INT_ALL_CLEAR);
+
+	if (FIELD_GET(PARF_INT_ALL_LINK_UP, status)) {
+		dev_dbg(dev, "Received Link up event. Starting enumeration!\n");
+		/* Rescan the bus to enumerate endpoint devices */
+		pci_lock_rescan_remove();
+		pci_rescan_bus(pp->bridge->bus);
+		pci_unlock_rescan_remove();
+	} else {
+		dev_WARN_ONCE(dev, 1, "Received unknown event. INT_STATUS: 0x%08x\n",
+			      status);
+	}
+
+	return IRQ_HANDLED;
+}
+
 static int qcom_pcie_probe(struct platform_device *pdev)
 {
 	const struct qcom_pcie_cfg *pcie_cfg;
@@ -1499,7 +1576,8 @@ static int qcom_pcie_probe(struct platform_device *pdev)
 	struct dw_pcie_rp *pp;
 	struct resource *res;
 	struct dw_pcie *pci;
-	int ret;
+	int ret, irq;
+	char *name;
 
 	pcie_cfg = of_device_get_match_data(dev);
 	if (!pcie_cfg || !pcie_cfg->ops) {
@@ -1620,6 +1698,27 @@ static int qcom_pcie_probe(struct platform_device *pdev)
 		goto err_phy_exit;
 	}
 
+	name = devm_kasprintf(dev, GFP_KERNEL, "qcom_pcie_global_irq%d",
+			      pci_domain_nr(pp->bridge->bus));
+	if (!name) {
+		ret = -ENOMEM;
+		goto err_host_deinit;
+	}
+
+	irq = platform_get_irq_byname_optional(pdev, "global");
+	if (irq > 0) {
+		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+						qcom_pcie_global_irq_thread,
+						IRQF_ONESHOT, name, pcie);
+		if (ret) {
+			dev_err_probe(&pdev->dev, ret,
+				      "Failed to request Global IRQ\n");
+			goto err_host_deinit;
+		}
+
+		writel_relaxed(PARF_INT_ALL_LINK_UP, pcie->parf + PARF_INT_ALL_MASK);
+	}
+
 	qcom_pcie_icc_opp_update(pcie);
 
 	if (pcie->mhi)
@@ -1627,6 +1726,8 @@ static int qcom_pcie_probe(struct platform_device *pdev)
 
 	return 0;
 
+err_host_deinit:
+	dw_pcie_host_deinit(pp);
 err_phy_exit:
 	phy_exit(pcie->phy);
 err_pm_runtime_put: