1 files changed, 29 insertions, 79 deletions

diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index 4d794964fa0f..c644216995f6 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -167,6 +167,14 @@ int dw_pcie_get_resources(struct dw_pcie *pci)
 		}
 	}
 
+	/* ELBI is an optional resource */
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "elbi");
+	if (res) {
+		pci->elbi_base = devm_ioremap_resource(pci->dev, res);
+		if (IS_ERR(pci->elbi_base))
+			return PTR_ERR(pci->elbi_base);
+	}
+
 	/* LLDD is supposed to manually switch the clocks and resets state */
 	if (dw_pcie_cap_is(pci, REQ_RES)) {
 		ret = dw_pcie_get_clocks(pci);
@@ -213,83 +221,16 @@ void dw_pcie_version_detect(struct dw_pcie *pci)
 		pci->type = ver;
 }
 
-/*
- * These interfaces resemble the pci_find_*capability() interfaces, but these
- * are for configuring host controllers, which are bridges *to* PCI devices but
- * are not PCI devices themselves.
- */
-static u8 __dw_pcie_find_next_cap(struct dw_pcie *pci, u8 cap_ptr,
-				  u8 cap)
-{
-	u8 cap_id, next_cap_ptr;
-	u16 reg;
-
-	if (!cap_ptr)
-		return 0;
-
-	reg = dw_pcie_readw_dbi(pci, cap_ptr);
-	cap_id = (reg & 0x00ff);
-
-	if (cap_id > PCI_CAP_ID_MAX)
-		return 0;
-
-	if (cap_id == cap)
-		return cap_ptr;
-
-	next_cap_ptr = (reg & 0xff00) >> 8;
-	return __dw_pcie_find_next_cap(pci, next_cap_ptr, cap);
-}
-
 u8 dw_pcie_find_capability(struct dw_pcie *pci, u8 cap)
 {
-	u8 next_cap_ptr;
-	u16 reg;
-
-	reg = dw_pcie_readw_dbi(pci, PCI_CAPABILITY_LIST);
-	next_cap_ptr = (reg & 0x00ff);
-
-	return __dw_pcie_find_next_cap(pci, next_cap_ptr, cap);
+	return PCI_FIND_NEXT_CAP(dw_pcie_read_cfg, PCI_CAPABILITY_LIST, cap,
+				 pci);
 }
 EXPORT_SYMBOL_GPL(dw_pcie_find_capability);
 
-static u16 dw_pcie_find_next_ext_capability(struct dw_pcie *pci, u16 start,
-					    u8 cap)
-{
-	u32 header;
-	int ttl;
-	int pos = PCI_CFG_SPACE_SIZE;
-
-	/* minimum 8 bytes per capability */
-	ttl = (PCI_CFG_SPACE_EXP_SIZE - PCI_CFG_SPACE_SIZE) / 8;
-
-	if (start)
-		pos = start;
-
-	header = dw_pcie_readl_dbi(pci, pos);
-	/*
-	 * If we have no capabilities, this is indicated by cap ID,
-	 * cap version and next pointer all being 0.
-	 */
-	if (header == 0)
-		return 0;
-
-	while (ttl-- > 0) {
-		if (PCI_EXT_CAP_ID(header) == cap && pos != start)
-			return pos;
-
-		pos = PCI_EXT_CAP_NEXT(header);
-		if (pos < PCI_CFG_SPACE_SIZE)
-			break;
-
-		header = dw_pcie_readl_dbi(pci, pos);
-	}
-
-	return 0;
-}
-
 u16 dw_pcie_find_ext_capability(struct dw_pcie *pci, u8 cap)
 {
-	return dw_pcie_find_next_ext_capability(pci, 0, cap);
+	return PCI_FIND_NEXT_EXT_CAP(dw_pcie_read_cfg, 0, cap, pci);
 }
 EXPORT_SYMBOL_GPL(dw_pcie_find_ext_capability);
 
@@ -302,8 +243,8 @@ static u16 __dw_pcie_find_vsec_capability(struct dw_pcie *pci, u16 vendor_id,
 	if (vendor_id != dw_pcie_readw_dbi(pci, PCI_VENDOR_ID))
 		return 0;
 
-	while ((vsec = dw_pcie_find_next_ext_capability(pci, vsec,
-						       PCI_EXT_CAP_ID_VNDR))) {
+	while ((vsec = PCI_FIND_NEXT_EXT_CAP(dw_pcie_read_cfg, vsec,
+					     PCI_EXT_CAP_ID_VNDR, pci))) {
 		header = dw_pcie_readl_dbi(pci, vsec + PCI_VNDR_HEADER);
 		if (PCI_VNDR_HEADER_ID(header) == vsec_id)
 			return vsec;
@@ -567,7 +508,7 @@ int dw_pcie_prog_outbound_atu(struct dw_pcie *pci,
 		val = dw_pcie_enable_ecrc(val);
 	dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL1, val);
 
-	val = PCIE_ATU_ENABLE;
+	val = PCIE_ATU_ENABLE | atu->ctrl2;
 	if (atu->type == PCIE_ATU_TYPE_MSG) {
 		/* The data-less messages only for now */
 		val |= PCIE_ATU_INHIBIT_PAYLOAD | atu->code;
@@ -702,18 +643,26 @@ int dw_pcie_wait_for_link(struct dw_pcie *pci)
 	int retries;
 
 	/* Check if the link is up or not */
-	for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
+	for (retries = 0; retries < PCIE_LINK_WAIT_MAX_RETRIES; retries++) {
 		if (dw_pcie_link_up(pci))
 			break;
 
-		msleep(LINK_WAIT_SLEEP_MS);
+		msleep(PCIE_LINK_WAIT_SLEEP_MS);
 	}
 
-	if (retries >= LINK_WAIT_MAX_RETRIES) {
+	if (retries >= PCIE_LINK_WAIT_MAX_RETRIES) {
 		dev_info(pci->dev, "Phy link never came up\n");
 		return -ETIMEDOUT;
 	}
 
+	/*
+	 * As per PCIe r6.0, sec 6.6.1, a Downstream Port that supports Link
+	 * speeds greater than 5.0 GT/s, software must wait a minimum of 100 ms
+	 * after Link training completes before sending a Configuration Request.
+	 */
+	if (pci->max_link_speed > 2)
+		msleep(PCIE_RESET_CONFIG_WAIT_MS);
+
 	offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
 	val = dw_pcie_readw_dbi(pci, offset + PCI_EXP_LNKSTA);
 
@@ -833,6 +782,9 @@ static void dw_pcie_link_set_max_link_width(struct dw_pcie *pci, u32 num_lanes)
 	case 8:
 		plc |= PORT_LINK_MODE_8_LANES;
 		break;
+	case 16:
+		plc |= PORT_LINK_MODE_16_LANES;
+		break;
 	default:
 		dev_err(pci->dev, "num-lanes %u: invalid value\n", num_lanes);
 		return;
@@ -1037,9 +989,7 @@ static int dw_pcie_edma_irq_verify(struct dw_pcie *pci)
 	char name[15];
 	int ret;
 
-	if (pci->edma.nr_irqs == 1)
-		return 0;
-	else if (pci->edma.nr_irqs > 1)
+	if (pci->edma.nr_irqs > 1)
 		return pci->edma.nr_irqs != ch_cnt ? -EINVAL : 0;
 
 	ret = platform_get_irq_byname_optional(pdev, "dma");