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path: root/drivers/pci/host/pcie-xilinx-nwl.c
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Diffstat (limited to 'drivers/pci/host/pcie-xilinx-nwl.c')
-rw-r--r--drivers/pci/host/pcie-xilinx-nwl.c198
1 files changed, 93 insertions, 105 deletions
diff --git a/drivers/pci/host/pcie-xilinx-nwl.c b/drivers/pci/host/pcie-xilinx-nwl.c
index 0b597d9190b4..43eaa4afab94 100644
--- a/drivers/pci/host/pcie-xilinx-nwl.c
+++ b/drivers/pci/host/pcie-xilinx-nwl.c
@@ -15,7 +15,7 @@
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
-#include <linux/module.h>
+#include <linux/init.h>
#include <linux/msi.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
@@ -85,10 +85,15 @@
#define MSGF_MISC_SR_MASTER_ERR BIT(5)
#define MSGF_MISC_SR_I_ADDR_ERR BIT(6)
#define MSGF_MISC_SR_E_ADDR_ERR BIT(7)
-#define MSGF_MISC_SR_UR_DETECT BIT(20)
-
-#define MSGF_MISC_SR_PCIE_CORE GENMASK(18, 16)
-#define MSGF_MISC_SR_PCIE_CORE_ERR GENMASK(31, 22)
+#define MSGF_MISC_SR_FATAL_AER BIT(16)
+#define MSGF_MISC_SR_NON_FATAL_AER BIT(17)
+#define MSGF_MISC_SR_CORR_AER BIT(18)
+#define MSGF_MISC_SR_UR_DETECT BIT(20)
+#define MSGF_MISC_SR_NON_FATAL_DEV BIT(22)
+#define MSGF_MISC_SR_FATAL_DEV BIT(23)
+#define MSGF_MISC_SR_LINK_DOWN BIT(24)
+#define MSGF_MSIC_SR_LINK_AUTO_BWIDTH BIT(25)
+#define MSGF_MSIC_SR_LINK_BWIDTH BIT(26)
#define MSGF_MISC_SR_MASKALL (MSGF_MISC_SR_RXMSG_AVAIL | \
MSGF_MISC_SR_RXMSG_OVER | \
@@ -96,9 +101,15 @@
MSGF_MISC_SR_MASTER_ERR | \
MSGF_MISC_SR_I_ADDR_ERR | \
MSGF_MISC_SR_E_ADDR_ERR | \
+ MSGF_MISC_SR_FATAL_AER | \
+ MSGF_MISC_SR_NON_FATAL_AER | \
+ MSGF_MISC_SR_CORR_AER | \
MSGF_MISC_SR_UR_DETECT | \
- MSGF_MISC_SR_PCIE_CORE | \
- MSGF_MISC_SR_PCIE_CORE_ERR)
+ MSGF_MISC_SR_NON_FATAL_DEV | \
+ MSGF_MISC_SR_FATAL_DEV | \
+ MSGF_MISC_SR_LINK_DOWN | \
+ MSGF_MSIC_SR_LINK_AUTO_BWIDTH | \
+ MSGF_MSIC_SR_LINK_BWIDTH)
/* Legacy interrupt status mask bits */
#define MSGF_LEG_SR_INTA BIT(0)
@@ -109,8 +120,8 @@
MSGF_LEG_SR_INTC | MSGF_LEG_SR_INTD)
/* MSI interrupt status mask bits */
-#define MSGF_MSI_SR_LO_MASK BIT(0)
-#define MSGF_MSI_SR_HI_MASK BIT(0)
+#define MSGF_MSI_SR_LO_MASK GENMASK(31, 0)
+#define MSGF_MSI_SR_HI_MASK GENMASK(31, 0)
#define MSII_PRESENT BIT(0)
#define MSII_ENABLE BIT(0)
@@ -201,6 +212,7 @@ static bool nwl_phy_link_up(struct nwl_pcie *pcie)
static int nwl_wait_for_link(struct nwl_pcie *pcie)
{
+ struct device *dev = pcie->dev;
int retries;
/* check if the link is up or not */
@@ -210,7 +222,7 @@ static int nwl_wait_for_link(struct nwl_pcie *pcie)
usleep_range(LINK_WAIT_USLEEP_MIN, LINK_WAIT_USLEEP_MAX);
}
- dev_err(pcie->dev, "PHY link never came up\n");
+ dev_err(dev, "PHY link never came up\n");
return -ETIMEDOUT;
}
@@ -266,6 +278,7 @@ static struct pci_ops nwl_pcie_ops = {
static irqreturn_t nwl_pcie_misc_handler(int irq, void *data)
{
struct nwl_pcie *pcie = data;
+ struct device *dev = pcie->dev;
u32 misc_stat;
/* Checking for misc interrupts */
@@ -275,24 +288,43 @@ static irqreturn_t nwl_pcie_misc_handler(int irq, void *data)
return IRQ_NONE;
if (misc_stat & MSGF_MISC_SR_RXMSG_OVER)
- dev_err(pcie->dev, "Received Message FIFO Overflow\n");
+ dev_err(dev, "Received Message FIFO Overflow\n");
if (misc_stat & MSGF_MISC_SR_SLAVE_ERR)
- dev_err(pcie->dev, "Slave error\n");
+ dev_err(dev, "Slave error\n");
if (misc_stat & MSGF_MISC_SR_MASTER_ERR)
- dev_err(pcie->dev, "Master error\n");
+ dev_err(dev, "Master error\n");
if (misc_stat & MSGF_MISC_SR_I_ADDR_ERR)
- dev_err(pcie->dev,
- "In Misc Ingress address translation error\n");
+ dev_err(dev, "In Misc Ingress address translation error\n");
if (misc_stat & MSGF_MISC_SR_E_ADDR_ERR)
- dev_err(pcie->dev,
- "In Misc Egress address translation error\n");
+ dev_err(dev, "In Misc Egress address translation error\n");
+
+ if (misc_stat & MSGF_MISC_SR_FATAL_AER)
+ dev_err(dev, "Fatal Error in AER Capability\n");
+
+ if (misc_stat & MSGF_MISC_SR_NON_FATAL_AER)
+ dev_err(dev, "Non-Fatal Error in AER Capability\n");
+
+ if (misc_stat & MSGF_MISC_SR_CORR_AER)
+ dev_err(dev, "Correctable Error in AER Capability\n");
+
+ if (misc_stat & MSGF_MISC_SR_UR_DETECT)
+ dev_err(dev, "Unsupported request Detected\n");
+
+ if (misc_stat & MSGF_MISC_SR_NON_FATAL_DEV)
+ dev_err(dev, "Non-Fatal Error Detected\n");
+
+ if (misc_stat & MSGF_MISC_SR_FATAL_DEV)
+ dev_err(dev, "Fatal Error Detected\n");
+
+ if (misc_stat & MSGF_MSIC_SR_LINK_AUTO_BWIDTH)
+ dev_info(dev, "Link Autonomous Bandwidth Management Status bit set\n");
- if (misc_stat & MSGF_MISC_SR_PCIE_CORE_ERR)
- dev_err(pcie->dev, "PCIe Core error\n");
+ if (misc_stat & MSGF_MSIC_SR_LINK_BWIDTH)
+ dev_info(dev, "Link Bandwidth Management Status bit set\n");
/* Clear misc interrupt status */
nwl_bridge_writel(pcie, misc_stat, MSGF_MISC_STATUS);
@@ -459,57 +491,24 @@ static const struct irq_domain_ops dev_msi_domain_ops = {
.free = nwl_irq_domain_free,
};
-static void nwl_msi_free_irq_domain(struct nwl_pcie *pcie)
-{
- struct nwl_msi *msi = &pcie->msi;
-
- if (msi->irq_msi0)
- irq_set_chained_handler_and_data(msi->irq_msi0, NULL, NULL);
- if (msi->irq_msi1)
- irq_set_chained_handler_and_data(msi->irq_msi1, NULL, NULL);
-
- if (msi->msi_domain)
- irq_domain_remove(msi->msi_domain);
- if (msi->dev_domain)
- irq_domain_remove(msi->dev_domain);
-
- kfree(msi->bitmap);
- msi->bitmap = NULL;
-}
-
-static void nwl_pcie_free_irq_domain(struct nwl_pcie *pcie)
-{
- int i;
- u32 irq;
-
- for (i = 0; i < INTX_NUM; i++) {
- irq = irq_find_mapping(pcie->legacy_irq_domain, i + 1);
- if (irq > 0)
- irq_dispose_mapping(irq);
- }
- if (pcie->legacy_irq_domain)
- irq_domain_remove(pcie->legacy_irq_domain);
-
- nwl_msi_free_irq_domain(pcie);
-}
-
static int nwl_pcie_init_msi_irq_domain(struct nwl_pcie *pcie)
{
#ifdef CONFIG_PCI_MSI
- struct fwnode_handle *fwnode = of_node_to_fwnode(pcie->dev->of_node);
+ struct device *dev = pcie->dev;
+ struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
struct nwl_msi *msi = &pcie->msi;
msi->dev_domain = irq_domain_add_linear(NULL, INT_PCI_MSI_NR,
&dev_msi_domain_ops, pcie);
if (!msi->dev_domain) {
- dev_err(pcie->dev, "failed to create dev IRQ domain\n");
+ dev_err(dev, "failed to create dev IRQ domain\n");
return -ENOMEM;
}
msi->msi_domain = pci_msi_create_irq_domain(fwnode,
&nwl_msi_domain_info,
msi->dev_domain);
if (!msi->msi_domain) {
- dev_err(pcie->dev, "failed to create msi IRQ domain\n");
+ dev_err(dev, "failed to create msi IRQ domain\n");
irq_domain_remove(msi->dev_domain);
return -ENOMEM;
}
@@ -519,12 +518,13 @@ static int nwl_pcie_init_msi_irq_domain(struct nwl_pcie *pcie)
static int nwl_pcie_init_irq_domain(struct nwl_pcie *pcie)
{
- struct device_node *node = pcie->dev->of_node;
+ struct device *dev = pcie->dev;
+ struct device_node *node = dev->of_node;
struct device_node *legacy_intc_node;
legacy_intc_node = of_get_next_child(node, NULL);
if (!legacy_intc_node) {
- dev_err(pcie->dev, "No legacy intc node found\n");
+ dev_err(dev, "No legacy intc node found\n");
return -EINVAL;
}
@@ -534,7 +534,7 @@ static int nwl_pcie_init_irq_domain(struct nwl_pcie *pcie)
pcie);
if (!pcie->legacy_irq_domain) {
- dev_err(pcie->dev, "failed to create IRQ domain\n");
+ dev_err(dev, "failed to create IRQ domain\n");
return -ENOMEM;
}
@@ -544,7 +544,8 @@ static int nwl_pcie_init_irq_domain(struct nwl_pcie *pcie)
static int nwl_pcie_enable_msi(struct nwl_pcie *pcie, struct pci_bus *bus)
{
- struct platform_device *pdev = to_platform_device(pcie->dev);
+ struct device *dev = pcie->dev;
+ struct platform_device *pdev = to_platform_device(dev);
struct nwl_msi *msi = &pcie->msi;
unsigned long base;
int ret;
@@ -559,7 +560,7 @@ static int nwl_pcie_enable_msi(struct nwl_pcie *pcie, struct pci_bus *bus)
/* Get msi_1 IRQ number */
msi->irq_msi1 = platform_get_irq_byname(pdev, "msi1");
if (msi->irq_msi1 < 0) {
- dev_err(&pdev->dev, "failed to get IRQ#%d\n", msi->irq_msi1);
+ dev_err(dev, "failed to get IRQ#%d\n", msi->irq_msi1);
ret = -EINVAL;
goto err;
}
@@ -570,7 +571,7 @@ static int nwl_pcie_enable_msi(struct nwl_pcie *pcie, struct pci_bus *bus)
/* Get msi_0 IRQ number */
msi->irq_msi0 = platform_get_irq_byname(pdev, "msi0");
if (msi->irq_msi0 < 0) {
- dev_err(&pdev->dev, "failed to get IRQ#%d\n", msi->irq_msi0);
+ dev_err(dev, "failed to get IRQ#%d\n", msi->irq_msi0);
ret = -EINVAL;
goto err;
}
@@ -581,7 +582,7 @@ static int nwl_pcie_enable_msi(struct nwl_pcie *pcie, struct pci_bus *bus)
/* Check for msii_present bit */
ret = nwl_bridge_readl(pcie, I_MSII_CAPABILITIES) & MSII_PRESENT;
if (!ret) {
- dev_err(pcie->dev, "MSI not present\n");
+ dev_err(dev, "MSI not present\n");
ret = -EIO;
goto err;
}
@@ -630,13 +631,14 @@ err:
static int nwl_pcie_bridge_init(struct nwl_pcie *pcie)
{
- struct platform_device *pdev = to_platform_device(pcie->dev);
+ struct device *dev = pcie->dev;
+ struct platform_device *pdev = to_platform_device(dev);
u32 breg_val, ecam_val, first_busno = 0;
int err;
breg_val = nwl_bridge_readl(pcie, E_BREG_CAPABILITIES) & BREG_PRESENT;
if (!breg_val) {
- dev_err(pcie->dev, "BREG is not present\n");
+ dev_err(dev, "BREG is not present\n");
return breg_val;
}
@@ -667,7 +669,7 @@ static int nwl_pcie_bridge_init(struct nwl_pcie *pcie)
ecam_val = nwl_bridge_readl(pcie, E_ECAM_CAPABILITIES) & E_ECAM_PRESENT;
if (!ecam_val) {
- dev_err(pcie->dev, "ECAM is not present\n");
+ dev_err(dev, "ECAM is not present\n");
return ecam_val;
}
@@ -694,23 +696,23 @@ static int nwl_pcie_bridge_init(struct nwl_pcie *pcie)
writel(ecam_val, (pcie->ecam_base + PCI_PRIMARY_BUS));
if (nwl_pcie_link_up(pcie))
- dev_info(pcie->dev, "Link is UP\n");
+ dev_info(dev, "Link is UP\n");
else
- dev_info(pcie->dev, "Link is DOWN\n");
+ dev_info(dev, "Link is DOWN\n");
/* Get misc IRQ number */
pcie->irq_misc = platform_get_irq_byname(pdev, "misc");
if (pcie->irq_misc < 0) {
- dev_err(&pdev->dev, "failed to get misc IRQ %d\n",
+ dev_err(dev, "failed to get misc IRQ %d\n",
pcie->irq_misc);
return -EINVAL;
}
- err = devm_request_irq(pcie->dev, pcie->irq_misc,
+ err = devm_request_irq(dev, pcie->irq_misc,
nwl_pcie_misc_handler, IRQF_SHARED,
"nwl_pcie:misc", pcie);
if (err) {
- dev_err(pcie->dev, "fail to register misc IRQ#%d\n",
+ dev_err(dev, "fail to register misc IRQ#%d\n",
pcie->irq_misc);
return err;
}
@@ -746,31 +748,32 @@ static int nwl_pcie_bridge_init(struct nwl_pcie *pcie)
static int nwl_pcie_parse_dt(struct nwl_pcie *pcie,
struct platform_device *pdev)
{
- struct device_node *node = pcie->dev->of_node;
+ struct device *dev = pcie->dev;
+ struct device_node *node = dev->of_node;
struct resource *res;
const char *type;
/* Check for device type */
type = of_get_property(node, "device_type", NULL);
if (!type || strcmp(type, "pci")) {
- dev_err(pcie->dev, "invalid \"device_type\" %s\n", type);
+ dev_err(dev, "invalid \"device_type\" %s\n", type);
return -EINVAL;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "breg");
- pcie->breg_base = devm_ioremap_resource(pcie->dev, res);
+ pcie->breg_base = devm_ioremap_resource(dev, res);
if (IS_ERR(pcie->breg_base))
return PTR_ERR(pcie->breg_base);
pcie->phys_breg_base = res->start;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcireg");
- pcie->pcireg_base = devm_ioremap_resource(pcie->dev, res);
+ pcie->pcireg_base = devm_ioremap_resource(dev, res);
if (IS_ERR(pcie->pcireg_base))
return PTR_ERR(pcie->pcireg_base);
pcie->phys_pcie_reg_base = res->start;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
- pcie->ecam_base = devm_ioremap_resource(pcie->dev, res);
+ pcie->ecam_base = devm_ioremap_resource(dev, res);
if (IS_ERR(pcie->ecam_base))
return PTR_ERR(pcie->ecam_base);
pcie->phys_ecam_base = res->start;
@@ -778,8 +781,7 @@ static int nwl_pcie_parse_dt(struct nwl_pcie *pcie,
/* Get intx IRQ number */
pcie->irq_intx = platform_get_irq_byname(pdev, "intx");
if (pcie->irq_intx < 0) {
- dev_err(&pdev->dev, "failed to get intx IRQ %d\n",
- pcie->irq_intx);
+ dev_err(dev, "failed to get intx IRQ %d\n", pcie->irq_intx);
return -EINVAL;
}
@@ -796,7 +798,8 @@ static const struct of_device_id nwl_pcie_of_match[] = {
static int nwl_pcie_probe(struct platform_device *pdev)
{
- struct device_node *node = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
struct nwl_pcie *pcie;
struct pci_bus *bus;
struct pci_bus *child;
@@ -804,42 +807,42 @@ static int nwl_pcie_probe(struct platform_device *pdev)
resource_size_t iobase = 0;
LIST_HEAD(res);
- pcie = devm_kzalloc(&pdev->dev, sizeof(*pcie), GFP_KERNEL);
+ pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
return -ENOMEM;
- pcie->dev = &pdev->dev;
+ pcie->dev = dev;
pcie->ecam_value = NWL_ECAM_VALUE_DEFAULT;
err = nwl_pcie_parse_dt(pcie, pdev);
if (err) {
- dev_err(pcie->dev, "Parsing DT failed\n");
+ dev_err(dev, "Parsing DT failed\n");
return err;
}
err = nwl_pcie_bridge_init(pcie);
if (err) {
- dev_err(pcie->dev, "HW Initialization failed\n");
+ dev_err(dev, "HW Initialization failed\n");
return err;
}
err = of_pci_get_host_bridge_resources(node, 0, 0xff, &res, &iobase);
if (err) {
- dev_err(pcie->dev, "Getting bridge resources failed\n");
+ dev_err(dev, "Getting bridge resources failed\n");
return err;
}
- err = devm_request_pci_bus_resources(pcie->dev, &res);
+ err = devm_request_pci_bus_resources(dev, &res);
if (err)
goto error;
err = nwl_pcie_init_irq_domain(pcie);
if (err) {
- dev_err(pcie->dev, "Failed creating IRQ Domain\n");
+ dev_err(dev, "Failed creating IRQ Domain\n");
goto error;
}
- bus = pci_create_root_bus(&pdev->dev, pcie->root_busno,
+ bus = pci_create_root_bus(dev, pcie->root_busno,
&nwl_pcie_ops, pcie, &res);
if (!bus) {
err = -ENOMEM;
@@ -849,8 +852,7 @@ static int nwl_pcie_probe(struct platform_device *pdev)
if (IS_ENABLED(CONFIG_PCI_MSI)) {
err = nwl_pcie_enable_msi(pcie, bus);
if (err < 0) {
- dev_err(&pdev->dev,
- "failed to enable MSI support: %d\n", err);
+ dev_err(dev, "failed to enable MSI support: %d\n", err);
goto error;
}
}
@@ -859,7 +861,6 @@ static int nwl_pcie_probe(struct platform_device *pdev)
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(bus);
- platform_set_drvdata(pdev, pcie);
return 0;
error:
@@ -867,25 +868,12 @@ error:
return err;
}
-static int nwl_pcie_remove(struct platform_device *pdev)
-{
- struct nwl_pcie *pcie = platform_get_drvdata(pdev);
-
- nwl_pcie_free_irq_domain(pcie);
- platform_set_drvdata(pdev, NULL);
- return 0;
-}
-
static struct platform_driver nwl_pcie_driver = {
.driver = {
.name = "nwl-pcie",
+ .suppress_bind_attrs = true,
.of_match_table = nwl_pcie_of_match,
},
.probe = nwl_pcie_probe,
- .remove = nwl_pcie_remove,
};
-module_platform_driver(nwl_pcie_driver);
-
-MODULE_AUTHOR("Xilinx, Inc");
-MODULE_DESCRIPTION("NWL PCIe driver");
-MODULE_LICENSE("GPL");
+builtin_platform_driver(nwl_pcie_driver);
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