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-rw-r--r--drivers/pci/host/Kconfig23
-rw-r--r--drivers/pci/host/Makefile2
-rw-r--r--drivers/pci/host/pci-host-generic.c41
-rw-r--r--drivers/pci/host/pci-imx6.c5
-rw-r--r--drivers/pci/host/pci-mvebu.c473
-rw-r--r--drivers/pci/host/pci-tegra.c4
-rw-r--r--drivers/pci/host/pci-xgene.c22
-rw-r--r--drivers/pci/host/pcie-altera-msi.c312
-rw-r--r--drivers/pci/host/pcie-altera.c579
-rw-r--r--drivers/pci/host/pcie-iproc-platform.c27
-rw-r--r--drivers/pci/host/pcie-iproc.c163
-rw-r--r--drivers/pci/host/pcie-iproc.h20
-rw-r--r--drivers/pci/host/pcie-rcar.c86
13 files changed, 1529 insertions, 228 deletions
diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
index d5e58bae95cf..dabab0c78380 100644
--- a/drivers/pci/host/Kconfig
+++ b/drivers/pci/host/Kconfig
@@ -39,7 +39,8 @@ config PCI_TEGRA
config PCI_RCAR_GEN2
bool "Renesas R-Car Gen2 Internal PCI controller"
- depends on ARCH_SHMOBILE || (ARM && COMPILE_TEST)
+ depends on ARM
+ depends on ARCH_SHMOBILE || COMPILE_TEST
help
Say Y here if you want internal PCI support on R-Car Gen2 SoC.
There are 3 internal PCI controllers available with a single
@@ -47,7 +48,8 @@ config PCI_RCAR_GEN2
config PCI_RCAR_GEN2_PCIE
bool "Renesas R-Car PCIe controller"
- depends on ARCH_SHMOBILE || (ARM && COMPILE_TEST)
+ depends on ARM
+ depends on ARCH_SHMOBILE || COMPILE_TEST
help
Say Y here if you want PCIe controller support on R-Car Gen2 SoCs.
@@ -145,4 +147,21 @@ config PCIE_IPROC_BCMA
Say Y here if you want to use the Broadcom iProc PCIe controller
through the BCMA bus interface
+config PCIE_ALTERA
+ bool "Altera PCIe controller"
+ depends on ARM || NIOS2
+ depends on OF_PCI
+ select PCI_DOMAINS
+ help
+ Say Y here if you want to enable PCIe controller support on Altera
+ FPGA.
+
+config PCIE_ALTERA_MSI
+ bool "Altera PCIe MSI feature"
+ depends on PCIE_ALTERA && PCI_MSI
+ select PCI_MSI_IRQ_DOMAIN
+ help
+ Say Y here if you want PCIe MSI support for the Altera FPGA.
+ This MSI driver supports Altera MSI to GIC controller IP.
+
endmenu
diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile
index 140d66f796e4..6c4913dfd235 100644
--- a/drivers/pci/host/Makefile
+++ b/drivers/pci/host/Makefile
@@ -17,3 +17,5 @@ obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o
obj-$(CONFIG_PCIE_IPROC) += pcie-iproc.o
obj-$(CONFIG_PCIE_IPROC_PLATFORM) += pcie-iproc-platform.o
obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o
+obj-$(CONFIG_PCIE_ALTERA) += pcie-altera.o
+obj-$(CONFIG_PCIE_ALTERA_MSI) += pcie-altera-msi.o
diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c
index 265dd25169bf..5434c90db243 100644
--- a/drivers/pci/host/pci-host-generic.c
+++ b/drivers/pci/host/pci-host-generic.c
@@ -27,7 +27,7 @@
struct gen_pci_cfg_bus_ops {
u32 bus_shift;
- void __iomem *(*map_bus)(struct pci_bus *, unsigned int, int);
+ struct pci_ops ops;
};
struct gen_pci_cfg_windows {
@@ -35,7 +35,7 @@ struct gen_pci_cfg_windows {
struct resource *bus_range;
void __iomem **win;
- const struct gen_pci_cfg_bus_ops *ops;
+ struct gen_pci_cfg_bus_ops *ops;
};
/*
@@ -65,7 +65,11 @@ static void __iomem *gen_pci_map_cfg_bus_cam(struct pci_bus *bus,
static struct gen_pci_cfg_bus_ops gen_pci_cfg_cam_bus_ops = {
.bus_shift = 16,
- .map_bus = gen_pci_map_cfg_bus_cam,
+ .ops = {
+ .map_bus = gen_pci_map_cfg_bus_cam,
+ .read = pci_generic_config_read,
+ .write = pci_generic_config_write,
+ }
};
static void __iomem *gen_pci_map_cfg_bus_ecam(struct pci_bus *bus,
@@ -80,12 +84,11 @@ static void __iomem *gen_pci_map_cfg_bus_ecam(struct pci_bus *bus,
static struct gen_pci_cfg_bus_ops gen_pci_cfg_ecam_bus_ops = {
.bus_shift = 20,
- .map_bus = gen_pci_map_cfg_bus_ecam,
-};
-
-static struct pci_ops gen_pci_ops = {
- .read = pci_generic_config_read,
- .write = pci_generic_config_write,
+ .ops = {
+ .map_bus = gen_pci_map_cfg_bus_ecam,
+ .read = pci_generic_config_read,
+ .write = pci_generic_config_write,
+ }
};
static const struct of_device_id gen_pci_of_match[] = {
@@ -166,6 +169,7 @@ static int gen_pci_parse_map_cfg_windows(struct gen_pci *pci)
struct resource *bus_range;
struct device *dev = pci->host.dev.parent;
struct device_node *np = dev->of_node;
+ u32 sz = 1 << pci->cfg.ops->bus_shift;
err = of_address_to_resource(np, 0, &pci->cfg.res);
if (err) {
@@ -193,10 +197,9 @@ static int gen_pci_parse_map_cfg_windows(struct gen_pci *pci)
bus_range = pci->cfg.bus_range;
for (busn = bus_range->start; busn <= bus_range->end; ++busn) {
u32 idx = busn - bus_range->start;
- u32 sz = 1 << pci->cfg.ops->bus_shift;
pci->cfg.win[idx] = devm_ioremap(dev,
- pci->cfg.res.start + busn * sz,
+ pci->cfg.res.start + idx * sz,
sz);
if (!pci->cfg.win[idx])
return -ENOMEM;
@@ -210,7 +213,6 @@ static int gen_pci_probe(struct platform_device *pdev)
int err;
const char *type;
const struct of_device_id *of_id;
- const int *prop;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct gen_pci *pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
@@ -225,17 +227,10 @@ static int gen_pci_probe(struct platform_device *pdev)
return -EINVAL;
}
- prop = of_get_property(of_chosen, "linux,pci-probe-only", NULL);
- if (prop) {
- if (*prop)
- pci_add_flags(PCI_PROBE_ONLY);
- else
- pci_clear_flags(PCI_PROBE_ONLY);
- }
+ of_pci_check_probe_only();
of_id = of_match_node(gen_pci_of_match, np);
- pci->cfg.ops = of_id->data;
- gen_pci_ops.map_bus = pci->cfg.ops->map_bus;
+ pci->cfg.ops = (struct gen_pci_cfg_bus_ops *)of_id->data;
pci->host.dev.parent = dev;
INIT_LIST_HEAD(&pci->host.windows);
INIT_LIST_HEAD(&pci->resources);
@@ -256,7 +251,9 @@ static int gen_pci_probe(struct platform_device *pdev)
if (!pci_has_flag(PCI_PROBE_ONLY))
pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS);
- bus = pci_scan_root_bus(dev, 0, &gen_pci_ops, pci, &pci->resources);
+
+ bus = pci_scan_root_bus(dev, pci->cfg.bus_range->start,
+ &pci->cfg.ops->ops, pci, &pci->resources);
if (!bus) {
dev_err(dev, "Scanning rootbus failed");
return -ENODEV;
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index 8f3a9813c4e5..22e8224126fd 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c
@@ -74,6 +74,7 @@ struct imx6_pcie {
/* PHY registers (not memory-mapped) */
#define PCIE_PHY_RX_ASIC_OUT 0x100D
+#define PCIE_PHY_RX_ASIC_OUT_VALID (1 << 0)
#define PHY_RX_OVRD_IN_LO 0x1005
#define PHY_RX_OVRD_IN_LO_RX_DATA_EN (1 << 5)
@@ -503,7 +504,7 @@ static int imx6_pcie_link_up(struct pcie_port *pp)
pcie_phy_read(pp->dbi_base, PCIE_PHY_RX_ASIC_OUT, &rx_valid);
debug_r0 = readl(pp->dbi_base + PCIE_PHY_DEBUG_R0);
- if (rx_valid & 0x01)
+ if (rx_valid & PCIE_PHY_RX_ASIC_OUT_VALID)
return 0;
if ((debug_r0 & 0x3f) != 0x0d)
@@ -539,7 +540,7 @@ static int __init imx6_add_pcie_port(struct pcie_port *pp,
IRQF_SHARED, "mx6-pcie-msi", pp);
if (ret) {
dev_err(&pdev->dev, "failed to request MSI irq\n");
- return -ENODEV;
+ return ret;
}
}
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index 67ec5e1c99db..53b79c5f0559 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -30,6 +30,7 @@
#define PCIE_DEV_REV_OFF 0x0008
#define PCIE_BAR_LO_OFF(n) (0x0010 + ((n) << 3))
#define PCIE_BAR_HI_OFF(n) (0x0014 + ((n) << 3))
+#define PCIE_CAP_PCIEXP 0x0060
#define PCIE_HEADER_LOG_4_OFF 0x0128
#define PCIE_BAR_CTRL_OFF(n) (0x1804 + (((n) - 1) * 4))
#define PCIE_WIN04_CTRL_OFF(n) (0x1820 + ((n) << 4))
@@ -57,14 +58,35 @@
#define PCIE_STAT_BUS 0xff00
#define PCIE_STAT_DEV 0x1f0000
#define PCIE_STAT_LINK_DOWN BIT(0)
+#define PCIE_RC_RTSTA 0x1a14
#define PCIE_DEBUG_CTRL 0x1a60
#define PCIE_DEBUG_SOFT_RESET BIT(20)
+enum {
+ PCISWCAP = PCI_BRIDGE_CONTROL + 2,
+ PCISWCAP_EXP_LIST_ID = PCISWCAP + PCI_CAP_LIST_ID,
+ PCISWCAP_EXP_DEVCAP = PCISWCAP + PCI_EXP_DEVCAP,
+ PCISWCAP_EXP_DEVCTL = PCISWCAP + PCI_EXP_DEVCTL,
+ PCISWCAP_EXP_LNKCAP = PCISWCAP + PCI_EXP_LNKCAP,
+ PCISWCAP_EXP_LNKCTL = PCISWCAP + PCI_EXP_LNKCTL,
+ PCISWCAP_EXP_SLTCAP = PCISWCAP + PCI_EXP_SLTCAP,
+ PCISWCAP_EXP_SLTCTL = PCISWCAP + PCI_EXP_SLTCTL,
+ PCISWCAP_EXP_RTCTL = PCISWCAP + PCI_EXP_RTCTL,
+ PCISWCAP_EXP_RTSTA = PCISWCAP + PCI_EXP_RTSTA,
+ PCISWCAP_EXP_DEVCAP2 = PCISWCAP + PCI_EXP_DEVCAP2,
+ PCISWCAP_EXP_DEVCTL2 = PCISWCAP + PCI_EXP_DEVCTL2,
+ PCISWCAP_EXP_LNKCAP2 = PCISWCAP + PCI_EXP_LNKCAP2,
+ PCISWCAP_EXP_LNKCTL2 = PCISWCAP + PCI_EXP_LNKCTL2,
+ PCISWCAP_EXP_SLTCAP2 = PCISWCAP + PCI_EXP_SLTCAP2,
+ PCISWCAP_EXP_SLTCTL2 = PCISWCAP + PCI_EXP_SLTCTL2,
+};
+
/* PCI configuration space of a PCI-to-PCI bridge */
struct mvebu_sw_pci_bridge {
u16 vendor;
u16 device;
u16 command;
+ u16 status;
u16 class;
u8 interface;
u8 revision;
@@ -84,13 +106,15 @@ struct mvebu_sw_pci_bridge {
u16 memlimit;
u16 iobaseupper;
u16 iolimitupper;
- u8 cappointer;
- u8 reserved1;
- u16 reserved2;
u32 romaddr;
u8 intline;
u8 intpin;
u16 bridgectrl;
+
+ /* PCI express capability */
+ u32 pcie_sltcap;
+ u16 pcie_devctl;
+ u16 pcie_rtctl;
};
struct mvebu_pcie_port;
@@ -119,8 +143,7 @@ struct mvebu_pcie_port {
unsigned int io_target;
unsigned int io_attr;
struct clk *clk;
- int reset_gpio;
- int reset_active_low;
+ struct gpio_desc *reset_gpio;
char *reset_name;
struct mvebu_sw_pci_bridge bridge;
struct device_node *dn;
@@ -254,15 +277,22 @@ static int mvebu_pcie_hw_rd_conf(struct mvebu_pcie_port *port,
struct pci_bus *bus,
u32 devfn, int where, int size, u32 *val)
{
+ void __iomem *conf_data = port->base + PCIE_CONF_DATA_OFF;
+
mvebu_writel(port, PCIE_CONF_ADDR(bus->number, devfn, where),
PCIE_CONF_ADDR_OFF);
- *val = mvebu_readl(port, PCIE_CONF_DATA_OFF);
-
- if (size == 1)
- *val = (*val >> (8 * (where & 3))) & 0xff;
- else if (size == 2)
- *val = (*val >> (8 * (where & 3))) & 0xffff;
+ switch (size) {
+ case 1:
+ *val = readb_relaxed(conf_data + (where & 3));
+ break;
+ case 2:
+ *val = readw_relaxed(conf_data + (where & 2));
+ break;
+ case 4:
+ *val = readl_relaxed(conf_data);
+ break;
+ }
return PCIBIOS_SUCCESSFUL;
}
@@ -271,22 +301,24 @@ static int mvebu_pcie_hw_wr_conf(struct mvebu_pcie_port *port,
struct pci_bus *bus,
u32 devfn, int where, int size, u32 val)
{
- u32 _val, shift = 8 * (where & 3);
+ void __iomem *conf_data = port->base + PCIE_CONF_DATA_OFF;
mvebu_writel(port, PCIE_CONF_ADDR(bus->number, devfn, where),
PCIE_CONF_ADDR_OFF);
- _val = mvebu_readl(port, PCIE_CONF_DATA_OFF);
- if (size == 4)
- _val = val;
- else if (size == 2)
- _val = (_val & ~(0xffff << shift)) | ((val & 0xffff) << shift);
- else if (size == 1)
- _val = (_val & ~(0xff << shift)) | ((val & 0xff) << shift);
- else
+ switch (size) {
+ case 1:
+ writeb(val, conf_data + (where & 3));
+ break;
+ case 2:
+ writew(val, conf_data + (where & 2));
+ break;
+ case 4:
+ writel(val, conf_data);
+ break;
+ default:
return PCIBIOS_BAD_REGISTER_NUMBER;
-
- mvebu_writel(port, _val, PCIE_CONF_DATA_OFF);
+ }
return PCIBIOS_SUCCESSFUL;
}
@@ -443,6 +475,9 @@ static void mvebu_sw_pci_bridge_init(struct mvebu_pcie_port *port)
/* We support 32 bits I/O addressing */
bridge->iobase = PCI_IO_RANGE_TYPE_32;
bridge->iolimit = PCI_IO_RANGE_TYPE_32;
+
+ /* Add capabilities */
+ bridge->status = PCI_STATUS_CAP_LIST;
}
/*
@@ -460,7 +495,7 @@ static int mvebu_sw_pci_bridge_read(struct mvebu_pcie_port *port,
break;
case PCI_COMMAND:
- *value = bridge->command;
+ *value = bridge->command | bridge->status << 16;
break;
case PCI_CLASS_REVISION:
@@ -505,6 +540,10 @@ static int mvebu_sw_pci_bridge_read(struct mvebu_pcie_port *port,
*value = (bridge->iolimitupper << 16 | bridge->iobaseupper);
break;
+ case PCI_CAPABILITY_LIST:
+ *value = PCISWCAP;
+ break;
+
case PCI_ROM_ADDRESS1:
*value = 0;
break;
@@ -514,9 +553,67 @@ static int mvebu_sw_pci_bridge_read(struct mvebu_pcie_port *port,
*value = 0;
break;
+ case PCISWCAP_EXP_LIST_ID:
+ /* Set PCIe v2, root port, slot support */
+ *value = (PCI_EXP_TYPE_ROOT_PORT << 4 | 2 |
+ PCI_EXP_FLAGS_SLOT) << 16 | PCI_CAP_ID_EXP;
+ break;
+
+ case PCISWCAP_EXP_DEVCAP:
+ *value = mvebu_readl(port, PCIE_CAP_PCIEXP + PCI_EXP_DEVCAP);
+ break;
+
+ case PCISWCAP_EXP_DEVCTL:
+ *value = mvebu_readl(port, PCIE_CAP_PCIEXP + PCI_EXP_DEVCTL) &
+ ~(PCI_EXP_DEVCTL_URRE | PCI_EXP_DEVCTL_FERE |
+ PCI_EXP_DEVCTL_NFERE | PCI_EXP_DEVCTL_CERE);
+ *value |= bridge->pcie_devctl;
+ break;
+
+ case PCISWCAP_EXP_LNKCAP:
+ /*
+ * PCIe requires the clock power management capability to be
+ * hard-wired to zero for downstream ports
+ */
+ *value = mvebu_readl(port, PCIE_CAP_PCIEXP + PCI_EXP_LNKCAP) &
+ ~PCI_EXP_LNKCAP_CLKPM;
+ break;
+
+ case PCISWCAP_EXP_LNKCTL:
+ *value = mvebu_readl(port, PCIE_CAP_PCIEXP + PCI_EXP_LNKCTL);
+ break;
+
+ case PCISWCAP_EXP_SLTCAP:
+ *value = bridge->pcie_sltcap;
+ break;
+
+ case PCISWCAP_EXP_SLTCTL:
+ *value = PCI_EXP_SLTSTA_PDS << 16;
+ break;
+
+ case PCISWCAP_EXP_RTCTL:
+ *value = bridge->pcie_rtctl;
+ break;
+
+ case PCISWCAP_EXP_RTSTA:
+ *value = mvebu_readl(port, PCIE_RC_RTSTA);
+ break;
+
+ /* PCIe requires the v2 fields to be hard-wired to zero */
+ case PCISWCAP_EXP_DEVCAP2:
+ case PCISWCAP_EXP_DEVCTL2:
+ case PCISWCAP_EXP_LNKCAP2:
+ case PCISWCAP_EXP_LNKCTL2:
+ case PCISWCAP_EXP_SLTCAP2:
+ case PCISWCAP_EXP_SLTCTL2:
default:
- *value = 0xffffffff;
- return PCIBIOS_BAD_REGISTER_NUMBER;
+ /*
+ * PCI defines configuration read accesses to reserved or
+ * unimplemented registers to read as zero and complete
+ * normally.
+ */
+ *value = 0;
+ return PCIBIOS_SUCCESSFUL;
}
if (size == 2)
@@ -601,6 +698,51 @@ static int mvebu_sw_pci_bridge_write(struct mvebu_pcie_port *port,
mvebu_pcie_set_local_bus_nr(port, bridge->secondary_bus);
break;
+ case PCISWCAP_EXP_DEVCTL:
+ /*
+ * Armada370 data says these bits must always
+ * be zero when in root complex mode.
+ */
+ value &= ~(PCI_EXP_DEVCTL_URRE | PCI_EXP_DEVCTL_FERE |
+ PCI_EXP_DEVCTL_NFERE | PCI_EXP_DEVCTL_CERE);
+
+ /*
+ * If the mask is 0xffff0000, then we only want to write
+ * the device control register, rather than clearing the
+ * RW1C bits in the device status register. Mask out the
+ * status register bits.
+ */
+ if (mask == 0xffff0000)
+ value &= 0xffff;
+
+ mvebu_writel(port, value, PCIE_CAP_PCIEXP + PCI_EXP_DEVCTL);
+ break;
+
+ case PCISWCAP_EXP_LNKCTL:
+ /*
+ * If we don't support CLKREQ, we must ensure that the
+ * CLKREQ enable bit always reads zero. Since we haven't
+ * had this capability, and it's dependent on board wiring,
+ * disable it for the time being.
+ */
+ value &= ~PCI_EXP_LNKCTL_CLKREQ_EN;
+
+ /*
+ * If the mask is 0xffff0000, then we only want to write
+ * the link control register, rather than clearing the
+ * RW1C bits in the link status register. Mask out the
+ * status register bits.
+ */
+ if (mask == 0xffff0000)
+ value &= 0xffff;
+
+ mvebu_writel(port, value, PCIE_CAP_PCIEXP + PCI_EXP_LNKCTL);
+ break;
+
+ case PCISWCAP_EXP_RTSTA:
+ mvebu_writel(port, value, PCIE_RC_RTSTA);
+ break;
+
default:
break;
}
@@ -652,17 +794,6 @@ static int mvebu_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
if (!mvebu_pcie_link_up(port))
return PCIBIOS_DEVICE_NOT_FOUND;
- /*
- * On the secondary bus, we don't want to expose any other
- * device than the device physically connected in the PCIe
- * slot, visible in slot 0. In slot 1, there's a special
- * Marvell device that only makes sense when the Armada is
- * used as a PCIe endpoint.
- */
- if (bus->number == port->bridge.secondary_bus &&
- PCI_SLOT(devfn) != 0)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
/* Access the real PCIe interface */
ret = mvebu_pcie_hw_wr_conf(port, bus, devfn,
where, size, val);
@@ -693,19 +824,6 @@ static int mvebu_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
return PCIBIOS_DEVICE_NOT_FOUND;
}
- /*
- * On the secondary bus, we don't want to expose any other
- * device than the device physically connected in the PCIe
- * slot, visible in slot 0. In slot 1, there's a special
- * Marvell device that only makes sense when the Armada is
- * used as a PCIe endpoint.
- */
- if (bus->number == port->bridge.secondary_bus &&
- PCI_SLOT(devfn) != 0) {
- *val = 0xffffffff;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
-
/* Access the real PCIe interface */
ret = mvebu_pcie_hw_rd_conf(port, bus, devfn,
where, size, val);
@@ -914,12 +1032,167 @@ static int mvebu_pcie_resume(struct device *dev)
return 0;
}
+static void mvebu_pcie_port_clk_put(void *data)
+{
+ struct mvebu_pcie_port *port = data;
+
+ clk_put(port->clk);
+}
+
+static int mvebu_pcie_parse_port(struct mvebu_pcie *pcie,
+ struct mvebu_pcie_port *port, struct device_node *child)
+{
+ struct device *dev = &pcie->pdev->dev;
+ enum of_gpio_flags flags;
+ int reset_gpio, ret;
+
+ port->pcie = pcie;
+
+ if (of_property_read_u32(child, "marvell,pcie-port", &port->port)) {
+ dev_warn(dev, "ignoring %s, missing pcie-port property\n",
+ of_node_full_name(child));
+ goto skip;
+ }
+
+ if (of_property_read_u32(child, "marvell,pcie-lane", &port->lane))
+ port->lane = 0;
+
+ port->name = devm_kasprintf(dev, GFP_KERNEL, "pcie%d.%d", port->port,
+ port->lane);
+ if (!port->name) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ port->devfn = of_pci_get_devfn(child);
+ if (port->devfn < 0)
+ goto skip;
+
+ ret = mvebu_get_tgt_attr(dev->of_node, port->devfn, IORESOURCE_MEM,
+ &port->mem_target, &port->mem_attr);
+ if (ret < 0) {
+ dev_err(dev, "%s: cannot get tgt/attr for mem window\n",
+ port->name);
+ goto skip;
+ }
+
+ if (resource_size(&pcie->io) != 0) {
+ mvebu_get_tgt_attr(dev->of_node, port->devfn, IORESOURCE_IO,
+ &port->io_target, &port->io_attr);
+ } else {
+ port->io_target = -1;
+ port->io_attr = -1;
+ }
+
+ reset_gpio = of_get_named_gpio_flags(child, "reset-gpios", 0, &flags);
+ if (reset_gpio == -EPROBE_DEFER) {
+ ret = reset_gpio;
+ goto err;
+ }
+
+ if (gpio_is_valid(reset_gpio)) {
+ unsigned long gpio_flags;
+
+ port->reset_name = devm_kasprintf(dev, GFP_KERNEL, "%s-reset",
+ port->name);
+ if (!port->reset_name) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ if (flags & OF_GPIO_ACTIVE_LOW) {
+ dev_info(dev, "%s: reset gpio is active low\n",
+ of_node_full_name(child));
+ gpio_flags = GPIOF_ACTIVE_LOW |
+ GPIOF_OUT_INIT_LOW;
+ } else {
+ gpio_flags = GPIOF_OUT_INIT_HIGH;
+ }
+
+ ret = devm_gpio_request_one(dev, reset_gpio, gpio_flags,
+ port->reset_name);
+ if (ret) {
+ if (ret == -EPROBE_DEFER)
+ goto err;
+ goto skip;
+ }
+
+ port->reset_gpio = gpio_to_desc(reset_gpio);
+ }
+
+ port->clk = of_clk_get_by_name(child, NULL);
+ if (IS_ERR(port->clk)) {
+ dev_err(dev, "%s: cannot get clock\n", port->name);
+ goto skip;
+ }
+
+ ret = devm_add_action(dev, mvebu_pcie_port_clk_put, port);
+ if (ret < 0) {
+ clk_put(port->clk);
+ goto err;
+ }
+
+ return 1;
+
+skip:
+ ret = 0;
+
+ /* In the case of skipping, we need to free these */
+ devm_kfree(dev, port->reset_name);
+ port->reset_name = NULL;
+ devm_kfree(dev, port->name);
+ port->name = NULL;
+
+err:
+ return ret;
+}
+
+/*
+ * Power up a PCIe port. PCIe requires the refclk to be stable for 100µs
+ * prior to releasing PERST. See table 2-4 in section 2.6.2 AC Specifications
+ * of the PCI Express Card Electromechanical Specification, 1.1.
+ */
+static int mvebu_pcie_powerup(struct mvebu_pcie_port *port)
+{
+ int ret;
+
+ ret = clk_prepare_enable(port->clk);
+ if (ret < 0)
+ return ret;
+
+ if (port->reset_gpio) {
+ u32 reset_udelay = 20000;
+
+ of_property_read_u32(port->dn, "reset-delay-us",
+ &reset_udelay);
+
+ udelay(100);
+
+ gpiod_set_value_cansleep(port->reset_gpio, 0);
+ msleep(reset_udelay / 1000);
+ }
+
+ return 0;
+}
+
+/*
+ * Power down a PCIe port. Strictly, PCIe requires us to place the card
+ * in D3hot state before asserting PERST#.
+ */
+static void mvebu_pcie_powerdown(struct mvebu_pcie_port *port)
+{
+ if (port->reset_gpio)
+ gpiod_set_value_cansleep(port->reset_gpio, 1);
+
+ clk_disable_unprepare(port->clk);
+}
+
static int mvebu_pcie_probe(struct platform_device *pdev)
{
struct mvebu_pcie *pcie;
struct device_node *np = pdev->dev.of_node;
struct device_node *child;
- int i, ret;
+ int num, i, ret;
pcie = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_pcie),
GFP_KERNEL);
@@ -955,112 +1228,52 @@ static int mvebu_pcie_probe(struct platform_device *pdev)
return ret;
}
- i = 0;
- for_each_child_of_node(pdev->dev.of_node, child) {
- if (!of_device_is_available(child))
- continue;
- i++;
- }
+ num = of_get_available_child_count(pdev->dev.of_node);
- pcie->ports = devm_kzalloc(&pdev->dev, i *
- sizeof(struct mvebu_pcie_port),
+ pcie->ports = devm_kcalloc(&pdev->dev, num, sizeof(*pcie->ports),
GFP_KERNEL);
if (!pcie->ports)
return -ENOMEM;
i = 0;
- for_each_child_of_node(pdev->dev.of_node, child) {
+ for_each_available_child_of_node(pdev->dev.of_node, child) {
struct mvebu_pcie_port *port = &pcie->ports[i];
- enum of_gpio_flags flags;
-
- if (!of_device_is_available(child))
- continue;
- port->pcie = pcie;
-
- if (of_property_read_u32(child, "marvell,pcie-port",
- &port->port)) {
- dev_warn(&pdev->dev,
- "ignoring PCIe DT node, missing pcie-port property\n");
- continue;
- }
-
- if (of_property_read_u32(child, "marvell,pcie-lane",
- &port->lane))
- port->lane = 0;
-
- port->name = kasprintf(GFP_KERNEL, "pcie%d.%d",
- port->port, port->lane);
-
- port->devfn = of_pci_get_devfn(child);
- if (port->devfn < 0)
- continue;
-
- ret = mvebu_get_tgt_attr(np, port->devfn, IORESOURCE_MEM,
- &port->mem_target, &port->mem_attr);
+ ret = mvebu_pcie_parse_port(pcie, port, child);
if (ret < 0) {
- dev_err(&pdev->dev, "PCIe%d.%d: cannot get tgt/attr for mem window\n",
- port->port, port->lane);
+ of_node_put(child);
+ return ret;
+ } else if (ret == 0) {
continue;
}
- if (resource_size(&pcie->io) != 0)
- mvebu_get_tgt_attr(np, port->devfn, IORESOURCE_IO,
- &port->io_target, &port->io_attr);
- else {
- port->io_target = -1;
- port->io_attr = -1;
- }
+ port->dn = child;
+ i++;
+ }
+ pcie->nports = i;
- port->reset_gpio = of_get_named_gpio_flags(child,
- "reset-gpios", 0, &flags);
- if (gpio_is_valid(port->reset_gpio)) {
- u32 reset_udelay = 20000;
-
- port->reset_active_low = flags & OF_GPIO_ACTIVE_LOW;
- port->reset_name = kasprintf(GFP_KERNEL,
- "pcie%d.%d-reset", port->port, port->lane);
- of_property_read_u32(child, "reset-delay-us",
- &reset_udelay);
-
- ret = devm_gpio_request_one(&pdev->dev,
- port->reset_gpio, GPIOF_DIR_OUT, port->reset_name);
- if (ret) {
- if (ret == -EPROBE_DEFER)
- return ret;
- continue;
- }
-
- gpio_set_value(port->reset_gpio,
- (port->reset_active_low) ? 1 : 0);
- msleep(reset_udelay/1000);
- }
+ for (i = 0; i < pcie->nports; i++) {
+ struct mvebu_pcie_port *port = &pcie->ports[i];
- port->clk = of_clk_get_by_name(child, NULL);
- if (IS_ERR(port->clk)) {
- dev_err(&pdev->dev, "PCIe%d.%d: cannot get clock\n",
- port->port, port->lane);
+ child = port->dn;
+ if (!child)
continue;
- }
- ret = clk_prepare_enable(port->clk);
- if (ret)
+ ret = mvebu_pcie_powerup(port);
+ if (ret < 0)
continue;
port->base = mvebu_pcie_map_registers(pdev, child, port);
if (IS_ERR(port->base)) {
- dev_err(&pdev->dev, "PCIe%d.%d: cannot map registers\n",
- port->port, port->lane);
+ dev_err(&pdev->dev, "%s: cannot map registers\n",
+ port->name);
port->base = NULL;
- clk_disable_unprepare(port->clk);
+ mvebu_pcie_powerdown(port);
continue;
}
mvebu_pcie_set_local_dev_nr(port, 1);
-
- port->dn = child;
mvebu_sw_pci_bridge_init(port);
- i++;
}
pcie->nports = i;
diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index 81df0c1fe063..3018ae52e092 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -382,8 +382,8 @@ static unsigned long tegra_pcie_conf_offset(unsigned int devfn, int where)
static struct tegra_pcie_bus *tegra_pcie_bus_alloc(struct tegra_pcie *pcie,
unsigned int busnr)
{
- pgprot_t prot = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | L_PTE_XN |
- L_PTE_MT_DEV_SHARED | L_PTE_SHARED;
+ pgprot_t prot = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
+ L_PTE_XN | L_PTE_MT_DEV_SHARED | L_PTE_SHARED);
phys_addr_t cs = pcie->cs->start;
struct tegra_pcie_bus *bus;
unsigned int i;
diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c
index 0236ab9d5720..ae00ce22d5a6 100644
--- a/drivers/pci/host/pci-xgene.c
+++ b/drivers/pci/host/pci-xgene.c
@@ -509,24 +509,6 @@ static int xgene_pcie_setup(struct xgene_pcie_port *port,
return 0;
}
-static int xgene_pcie_msi_enable(struct pci_bus *bus)
-{
- struct device_node *msi_node;
-
- msi_node = of_parse_phandle(bus->dev.of_node,
- "msi-parent", 0);
- if (!msi_node)
- return -ENODEV;
-
- bus->msi = of_pci_find_msi_chip_by_node(msi_node);
- if (!bus->msi)
- return -ENODEV;
-
- of_node_put(msi_node);
- bus->msi->dev = &bus->dev;
- return 0;
-}
-
static int xgene_pcie_probe_bridge(struct platform_device *pdev)
{
struct device_node *dn = pdev->dev.of_node;
@@ -567,10 +549,6 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev)
if (!bus)
return -ENOMEM;
- if (IS_ENABLED(CONFIG_PCI_MSI))
- if (xgene_pcie_msi_enable(bus))
- dev_info(port->dev, "failed to enable MSI\n");
-
pci_scan_child_bus(bus);
pci_assign_unassigned_bus_resources(bus);
pci_bus_add_devices(bus);
diff --git a/drivers/pci/host/pcie-altera-msi.c b/drivers/pci/host/pcie-altera-msi.c
new file mode 100644
index 000000000000..2c37e8620c37
--- /dev/null
+++ b/drivers/pci/host/pcie-altera-msi.c
@@ -0,0 +1,312 @@
+/*
+ * Copyright Altera Corporation (C) 2013-2015. All rights reserved
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/module.h>
+#include <linux/msi.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_pci.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#define MSI_STATUS 0x0
+#define MSI_ERROR 0x4
+#define MSI_INTMASK 0x8
+
+#define MAX_MSI_VECTORS 32
+
+struct altera_msi {
+ DECLARE_BITMAP(used, MAX_MSI_VECTORS);
+ struct mutex lock; /* protect "used" bitmap */
+ struct platform_device *pdev;
+ struct irq_domain *msi_domain;
+ struct irq_domain *inner_domain;
+ void __iomem *csr_base;
+ void __iomem *vector_base;
+ phys_addr_t vector_phy;
+ u32 num_of_vectors;
+ int irq;
+};
+
+static inline void msi_writel(struct altera_msi *msi, const u32 value,
+ const u32 reg)
+{
+ writel_relaxed(value, msi->csr_base + reg);
+}
+
+static inline u32 msi_readl(struct altera_msi *msi, const u32 reg)
+{
+ return readl_relaxed(msi->csr_base + reg);
+}
+
+static void altera_msi_isr(struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct altera_msi *msi;
+ unsigned long status;
+ u32 num_of_vectors;
+ u32 bit;
+ u32 virq;
+
+ chained_irq_enter(chip, desc);
+ msi = irq_desc_get_handler_data(desc);
+ num_of_vectors = msi->num_of_vectors;
+
+ while ((status = msi_readl(msi, MSI_STATUS)) != 0) {
+ for_each_set_bit(bit, &status, msi->num_of_vectors) {
+ /* Dummy read from vector to clear the interrupt */
+ readl_relaxed(msi->vector_base + (bit * sizeof(u32)));
+
+ virq = irq_find_mapping(msi->inner_domain, bit);
+ if (virq)
+ generic_handle_irq(virq);
+ else
+ dev_err(&msi->pdev->dev, "unexpected MSI\n");
+ }
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+static struct irq_chip altera_msi_irq_chip = {
+ .name = "Altera PCIe MSI",
+ .irq_mask = pci_msi_mask_irq,
+ .irq_unmask = pci_msi_unmask_irq,
+};
+
+static struct msi_domain_info altera_msi_domain_info = {
+ .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
+ MSI_FLAG_PCI_MSIX),
+ .chip = &altera_msi_irq_chip,
+};
+
+static void altera_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+{
+ struct altera_msi *msi = irq_data_get_irq_chip_data(data);
+ phys_addr_t addr = msi->vector_phy + (data->hwirq * sizeof(u32));
+
+ msg->address_lo = lower_32_bits(addr);
+ msg->address_hi = upper_32_bits(addr);
+ msg->data = data->hwirq;
+
+ dev_dbg(&msi->pdev->dev, "msi#%d address_hi %#x address_lo %#x\n",
+ (int)data->hwirq, msg->address_hi, msg->address_lo);
+}
+
+static int altera_msi_set_affinity(struct irq_data *irq_data,
+ const struct cpumask *mask, bool force)
+{
+ return -EINVAL;
+}
+
+static struct irq_chip altera_msi_bottom_irq_chip = {
+ .name = "Altera MSI",
+ .irq_compose_msi_msg = altera_compose_msi_msg,
+ .irq_set_affinity = altera_msi_set_affinity,
+};
+
+static int altera_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs, void *args)
+{
+ struct altera_msi *msi = domain->host_data;
+ unsigned long bit;
+ u32 mask;
+
+ WARN_ON(nr_irqs != 1);
+ mutex_lock(&msi->lock);
+
+ bit = find_first_zero_bit(msi->used, msi->num_of_vectors);
+ if (bit >= msi->num_of_vectors) {
+ mutex_unlock(&msi->lock);
+ return -ENOSPC;
+ }
+
+ set_bit(bit, msi->used);
+
+ mutex_unlock(&msi->lock);
+
+ irq_domain_set_info(domain, virq, bit, &altera_msi_bottom_irq_chip,
+ domain->host_data, handle_simple_irq,
+ NULL, NULL);
+
+ mask = msi_readl(msi, MSI_INTMASK);
+ mask |= 1 << bit;
+ msi_writel(msi, mask, MSI_INTMASK);
+
+ return 0;
+}
+
+static void altera_irq_domain_free(struct irq_domain *domain,
+ unsigned int virq, unsigned int nr_irqs)
+{
+ struct irq_data *d = irq_domain_get_irq_data(domain, virq);
+ struct altera_msi *msi = irq_data_get_irq_chip_data(d);
+ u32 mask;
+
+ mutex_lock(&msi->lock);
+
+ if (!test_bit(d->hwirq, msi->used)) {
+ dev_err(&msi->pdev->dev, "trying to free unused MSI#%lu\n",
+ d->hwirq);
+ } else {
+ __clear_bit(d->hwirq, msi->used);
+ mask = msi_readl(msi, MSI_INTMASK);
+ mask &= ~(1 << d->hwirq);
+ msi_writel(msi, mask, MSI_INTMASK);
+ }
+
+ mutex_unlock(&msi->lock);
+}
+
+static const struct irq_domain_ops msi_domain_ops = {
+ .alloc = altera_irq_domain_alloc,
+ .free = altera_irq_domain_free,
+};
+
+static int altera_allocate_domains(struct altera_msi *msi)
+{
+ msi->inner_domain = irq_domain_add_linear(NULL, msi->num_of_vectors,
+ &msi_domain_ops, msi);
+ if (!msi->inner_domain) {
+ dev_err(&msi->pdev->dev, "failed to create IRQ domain\n");
+ return -ENOMEM;
+ }
+
+ msi->msi_domain = pci_msi_create_irq_domain(msi->pdev->dev.of_node,
+ &altera_msi_domain_info, msi->inner_domain);
+ if (!msi->msi_domain) {
+ dev_err(&msi->pdev->dev, "failed to create MSI domain\n");
+ irq_domain_remove(msi->inner_domain);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void altera_free_domains(struct altera_msi *msi)
+{
+ irq_domain_remove(msi->msi_domain);
+ irq_domain_remove(msi->inner_domain);
+}
+
+static int altera_msi_remove(struct platform_device *pdev)
+{
+ struct altera_msi *msi = platform_get_drvdata(pdev);
+
+ msi_writel(msi, 0, MSI_INTMASK);
+ irq_set_chained_handler(msi->irq, NULL);
+ irq_set_handler_data(msi->irq, NULL);
+
+ altera_free_domains(msi);
+
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static int altera_msi_probe(struct platform_device *pdev)
+{
+ struct altera_msi *msi;
+ struct device_node *np = pdev->dev.of_node;
+ struct resource *res;
+ int ret;
+
+ msi = devm_kzalloc(&pdev->dev, sizeof(struct altera_msi),
+ GFP_KERNEL);
+ if (!msi)
+ return -ENOMEM;
+
+ mutex_init(&msi->lock);
+ msi->pdev = pdev;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "csr");
+ if (!res) {
+ dev_err(&pdev->dev, "no csr memory resource defined\n");
+ return -ENODEV;
+ }
+
+ msi->csr_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(msi->csr_base)) {
+ dev_err(&pdev->dev, "failed to map csr memory\n");
+ return PTR_ERR(msi->csr_base);
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "vector_slave");
+ if (!res) {
+ dev_err(&pdev->dev, "no vector_slave memory resource defined\n");
+ return -ENODEV;
+ }
+
+ msi->vector_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(msi->vector_base)) {
+ dev_err(&pdev->dev, "failed to map vector_slave memory\n");
+ return PTR_ERR(msi->vector_base);
+ }
+
+ msi->vector_phy = res->start;
+
+ if (of_property_read_u32(np, "num-vectors", &msi->num_of_vectors)) {
+ dev_err(&pdev->dev, "failed to parse the number of vectors\n");
+ return -EINVAL;
+ }
+
+ ret = altera_allocate_domains(msi);
+ if (ret)
+ return ret;
+
+ msi->irq = platform_get_irq(pdev, 0);
+ if (msi->irq <= 0) {
+ dev_err(&pdev->dev, "failed to map IRQ: %d\n", msi->irq);
+ ret = -ENODEV;
+ goto err;
+ }
+
+ irq_set_chained_handler_and_data(msi->irq, altera_msi_isr, msi);
+ platform_set_drvdata(pdev, msi);
+
+ return 0;
+
+err:
+ altera_msi_remove(pdev);
+ return ret;
+}
+
+static const struct of_device_id altera_msi_of_match[] = {
+ { .compatible = "altr,msi-1.0", NULL },
+ { },
+};
+
+static struct platform_driver altera_msi_driver = {
+ .driver = {
+ .name = "altera-msi",
+ .of_match_table = altera_msi_of_match,
+ },
+ .probe = altera_msi_probe,
+ .remove = altera_msi_remove,
+};
+
+static int __init altera_msi_init(void)
+{
+ return platform_driver_register(&altera_msi_driver);
+}
+subsys_initcall(altera_msi_init);
+
+MODULE_AUTHOR("Ley Foon Tan <lftan@altera.com>");
+MODULE_DESCRIPTION("Altera PCIe MSI support");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pci/host/pcie-altera.c b/drivers/pci/host/pcie-altera.c
new file mode 100644
index 000000000000..e5dda38bdde5
--- /dev/null
+++ b/drivers/pci/host/pcie-altera.c
@@ -0,0 +1,579 @@
+/*
+ * Copyright Altera Corporation (C) 2013-2015. All rights reserved
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_pci.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#define RP_TX_REG0 0x2000
+#define RP_TX_REG1 0x2004
+#define RP_TX_CNTRL 0x2008
+#define RP_TX_EOP 0x2
+#define RP_TX_SOP 0x1
+#define RP_RXCPL_STATUS 0x2010
+#define RP_RXCPL_EOP 0x2
+#define RP_RXCPL_SOP 0x1
+#define RP_RXCPL_REG0 0x2014
+#define RP_RXCPL_REG1 0x2018
+#define P2A_INT_STATUS 0x3060
+#define P2A_INT_STS_ALL 0xf
+#define P2A_INT_ENABLE 0x3070
+#define P2A_INT_ENA_ALL 0xf
+#define RP_LTSSM 0x3c64
+#define LTSSM_L0 0xf
+
+/* TLP configuration type 0 and 1 */
+#define TLP_FMTTYPE_CFGRD0 0x04 /* Configuration Read Type 0 */
+#define TLP_FMTTYPE_CFGWR0 0x44 /* Configuration Write Type 0 */
+#define TLP_FMTTYPE_CFGRD1 0x05 /* Configuration Read Type 1 */
+#define TLP_FMTTYPE_CFGWR1 0x45 /* Configuration Write Type 1 */
+#define TLP_PAYLOAD_SIZE 0x01
+#define TLP_READ_TAG 0x1d
+#define TLP_WRITE_TAG 0x10
+#define TLP_CFG_DW0(fmttype) (((fmttype) << 24) | TLP_PAYLOAD_SIZE)
+#define TLP_CFG_DW1(reqid, tag, be) (((reqid) << 16) | (tag << 8) | (be))
+#define TLP_CFG_DW2(bus, devfn, offset) \
+ (((bus) << 24) | ((devfn) << 16) | (offset))
+#define TLP_REQ_ID(bus, devfn) (((bus) << 8) | (devfn))
+#define TLP_HDR_SIZE 3
+#define TLP_LOOP 500
+
+#define INTX_NUM 4
+
+#define DWORD_MASK 3
+
+struct altera_pcie {
+ struct platform_device *pdev;
+ void __iomem *cra_base;
+ int irq;
+ u8 root_bus_nr;
+ struct irq_domain *irq_domain;
+ struct resource bus_range;
+ struct list_head resources;
+};
+
+struct tlp_rp_regpair_t {
+ u32 ctrl;
+ u32 reg0;
+ u32 reg1;
+};
+
+static void altera_pcie_retrain(struct pci_dev *dev)
+{
+ u16 linkcap, linkstat;
+
+ /*
+ * Set the retrain bit if the PCIe rootport support > 2.5GB/s, but
+ * current speed is 2.5 GB/s.
+ */
+ pcie_capability_read_word(dev, PCI_EXP_LNKCAP, &linkcap);
+
+ if ((linkcap & PCI_EXP_LNKCAP_SLS) <= PCI_EXP_LNKCAP_SLS_2_5GB)
+ return;
+
+ pcie_capability_read_word(dev, PCI_EXP_LNKSTA, &linkstat);
+ if ((linkstat & PCI_EXP_LNKSTA_CLS) == PCI_EXP_LNKSTA_CLS_2_5GB)
+ pcie_capability_set_word(dev, PCI_EXP_LNKCTL,
+ PCI_EXP_LNKCTL_RL);
+}
+DECLARE_PCI_FIXUP_EARLY(0x1172, PCI_ANY_ID, altera_pcie_retrain);
+
+/*
+ * Altera PCIe port uses BAR0 of RC's configuration space as the translation
+ * from PCI bus to native BUS. Entire DDR region is mapped into PCIe space
+ * using these registers, so it can be reached by DMA from EP devices.
+ * This BAR0 will also access to MSI vector when receiving MSI/MSIX interrupt
+ * from EP devices, eventually trigger interrupt to GIC. The BAR0 of bridge
+ * should be hidden during enumeration to avoid the sizing and resource
+ * allocation by PCIe core.
+ */
+static bool altera_pcie_hide_rc_bar(struct pci_bus *bus, unsigned int devfn,
+ int offset)
+{
+ if (pci_is_root_bus(bus) && (devfn == 0) &&
+ (offset == PCI_BASE_ADDRESS_0))
+ return true;
+
+ return false;
+}
+
+static inline void cra_writel(struct altera_pcie *pcie, const u32 value,
+ const u32 reg)
+{
+ writel_relaxed(value, pcie->cra_base + reg);
+}
+
+static inline u32 cra_readl(struct altera_pcie *pcie, const u32 reg)
+{
+ return readl_relaxed(pcie->cra_base + reg);
+}
+
+static void tlp_write_tx(struct altera_pcie *pcie,
+ struct tlp_rp_regpair_t *tlp_rp_regdata)
+{
+ cra_writel(pcie, tlp_rp_regdata->reg0, RP_TX_REG0);
+ cra_writel(pcie, tlp_rp_regdata->reg1, RP_TX_REG1);
+ cra_writel(pcie, tlp_rp_regdata->ctrl, RP_TX_CNTRL);
+}
+
+static bool altera_pcie_link_is_up(struct altera_pcie *pcie)
+{
+ return !!(cra_readl(pcie, RP_LTSSM) & LTSSM_L0);
+}
+
+static bool altera_pcie_valid_config(struct altera_pcie *pcie,
+ struct pci_bus *bus, int dev)
+{
+ /* If there is no link, then there is no device */
+ if (bus->number != pcie->root_bus_nr) {
+ if (!altera_pcie_link_is_up(pcie))
+ return false;
+ }
+
+ /* access only one slot on each root port */
+ if (bus->number == pcie->root_bus_nr && dev > 0)
+ return false;
+
+ /*
+ * Do not read more than one device on the bus directly attached
+ * to root port, root port can only attach to one downstream port.
+ */
+ if (bus->primary == pcie->root_bus_nr && dev > 0)
+ return false;
+
+ return true;
+}
+
+static int tlp_read_packet(struct altera_pcie *pcie, u32 *value)
+{
+ u8 loop;
+ bool sop = 0;
+ u32 ctrl;
+ u32 reg0, reg1;
+
+ /*
+ * Minimum 2 loops to read TLP headers and 1 loop to read data
+ * payload.
+ */
+ for (loop = 0; loop < TLP_LOOP; loop++) {
+ ctrl = cra_readl(pcie, RP_RXCPL_STATUS);
+ if ((ctrl & RP_RXCPL_SOP) || (ctrl & RP_RXCPL_EOP) || sop) {
+ reg0 = cra_readl(pcie, RP_RXCPL_REG0);
+ reg1 = cra_readl(pcie, RP_RXCPL_REG1);
+
+ if (ctrl & RP_RXCPL_SOP)
+ sop = true;
+
+ if (ctrl & RP_RXCPL_EOP) {
+ if (value)
+ *value = reg0;
+ return PCIBIOS_SUCCESSFUL;
+ }
+ }
+ udelay(5);
+ }
+
+ return -ENOENT;
+}
+
+static void tlp_write_packet(struct altera_pcie *pcie, u32 *headers,
+ u32 data, bool align)
+{
+ struct tlp_rp_regpair_t tlp_rp_regdata;
+
+ tlp_rp_regdata.reg0 = headers[0];
+ tlp_rp_regdata.reg1 = headers[1];
+ tlp_rp_regdata.ctrl = RP_TX_SOP;
+ tlp_write_tx(pcie, &tlp_rp_regdata);
+
+ if (align) {
+ tlp_rp_regdata.reg0 = headers[2];
+ tlp_rp_regdata.reg1 = 0;
+ tlp_rp_regdata.ctrl = 0;
+ tlp_write_tx(pcie, &tlp_rp_regdata);
+
+ tlp_rp_regdata.reg0 = data;
+ tlp_rp_regdata.reg1 = 0;
+ } else {
+ tlp_rp_regdata.reg0 = headers[2];
+ tlp_rp_regdata.reg1 = data;
+ }
+
+ tlp_rp_regdata.ctrl = RP_TX_EOP;
+ tlp_write_tx(pcie, &tlp_rp_regdata);
+}
+
+static int tlp_cfg_dword_read(struct altera_pcie *pcie, u8 bus, u32 devfn,
+ int where, u8 byte_en, u32 *value)
+{
+ u32 headers[TLP_HDR_SIZE];
+
+ if (bus == pcie->root_bus_nr)
+ headers[0] = TLP_CFG_DW0(TLP_FMTTYPE_CFGRD0);
+ else
+ headers[0] = TLP_CFG_DW0(TLP_FMTTYPE_CFGRD1);
+
+ headers[1] = TLP_CFG_DW1(TLP_REQ_ID(pcie->root_bus_nr, devfn),
+ TLP_READ_TAG, byte_en);
+ headers[2] = TLP_CFG_DW2(bus, devfn, where);
+
+ tlp_write_packet(pcie, headers, 0, false);
+
+ return tlp_read_packet(pcie, value);
+}
+
+static int tlp_cfg_dword_write(struct altera_pcie *pcie, u8 bus, u32 devfn,
+ int where, u8 byte_en, u32 value)
+{
+ u32 headers[TLP_HDR_SIZE];
+ int ret;
+
+ if (bus == pcie->root_bus_nr)
+ headers[0] = TLP_CFG_DW0(TLP_FMTTYPE_CFGWR0);
+ else
+ headers[0] = TLP_CFG_DW0(TLP_FMTTYPE_CFGWR1);
+
+ headers[1] = TLP_CFG_DW1(TLP_REQ_ID(pcie->root_bus_nr, devfn),
+ TLP_WRITE_TAG, byte_en);
+ headers[2] = TLP_CFG_DW2(bus, devfn, where);
+
+ /* check alignment to Qword */
+ if ((where & 0x7) == 0)
+ tlp_write_packet(pcie, headers, value, true);
+ else
+ tlp_write_packet(pcie, headers, value, false);
+
+ ret = tlp_read_packet(pcie, NULL);
+ if (ret != PCIBIOS_SUCCESSFUL)
+ return ret;
+
+ /*
+ * Monitor changes to PCI_PRIMARY_BUS register on root port
+ * and update local copy of root bus number accordingly.
+ */
+ if ((bus == pcie->root_bus_nr) && (where == PCI_PRIMARY_BUS))
+ pcie->root_bus_nr = (u8)(value);
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int altera_pcie_cfg_read(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 *value)
+{
+ struct altera_pcie *pcie = bus->sysdata;
+ int ret;
+ u32 data;
+ u8 byte_en;
+
+ if (altera_pcie_hide_rc_bar(bus, devfn, where))
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ if (!altera_pcie_valid_config(pcie, bus, PCI_SLOT(devfn))) {
+ *value = 0xffffffff;
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
+
+ switch (size) {
+ case 1:
+ byte_en = 1 << (where & 3);
+ break;
+ case 2:
+ byte_en = 3 << (where & 3);
+ break;
+ default:
+ byte_en = 0xf;
+ break;
+ }
+
+ ret = tlp_cfg_dword_read(pcie, bus->number, devfn,
+ (where & ~DWORD_MASK), byte_en, &data);
+ if (ret != PCIBIOS_SUCCESSFUL)
+ return ret;
+
+ switch (size) {
+ case 1:
+ *value = (data >> (8 * (where & 0x3))) & 0xff;
+ break;
+ case 2:
+ *value = (data >> (8 * (where & 0x2))) & 0xffff;
+ break;
+ default:
+ *value = data;
+ break;
+ }
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int altera_pcie_cfg_write(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 value)
+{
+ struct altera_pcie *pcie = bus->sysdata;
+ u32 data32;
+ u32 shift = 8 * (where & 3);
+ u8 byte_en;
+
+ if (altera_pcie_hide_rc_bar(bus, devfn, where))
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ if (!altera_pcie_valid_config(pcie, bus, PCI_SLOT(devfn)))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ switch (size) {
+ case 1:
+ data32 = (value & 0xff) << shift;
+ byte_en = 1 << (where & 3);
+ break;
+ case 2:
+ data32 = (value & 0xffff) << shift;
+ byte_en = 3 << (where & 3);
+ break;
+ default:
+ data32 = value;
+ byte_en = 0xf;
+ break;
+ }
+
+ return tlp_cfg_dword_write(pcie, bus->number, devfn,
+ (where & ~DWORD_MASK), byte_en, data32);
+}
+
+static struct pci_ops altera_pcie_ops = {
+ .read = altera_pcie_cfg_read,
+ .write = altera_pcie_cfg_write,
+};
+
+static int altera_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
+ irq_set_chip_data(irq, domain->host_data);
+
+ return 0;
+}
+
+static const struct irq_domain_ops intx_domain_ops = {
+ .map = altera_pcie_intx_map,
+};
+
+static void altera_pcie_isr(struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct altera_pcie *pcie;
+ unsigned long status;
+ u32 bit;
+ u32 virq;
+
+ chained_irq_enter(chip, desc);
+ pcie = irq_desc_get_handler_data(desc);
+
+ while ((status = cra_readl(pcie, P2A_INT_STATUS)
+ & P2A_INT_STS_ALL) != 0) {
+ for_each_set_bit(bit, &status, INTX_NUM) {
+ /* clear interrupts */
+ cra_writel(pcie, 1 << bit, P2A_INT_STATUS);
+
+ virq = irq_find_mapping(pcie->irq_domain, bit + 1);
+ if (virq)
+ generic_handle_irq(virq);
+ else
+ dev_err(&pcie->pdev->dev,
+ "unexpected IRQ, INT%d\n", bit);
+ }
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+static void altera_pcie_release_of_pci_ranges(struct altera_pcie *pcie)
+{
+ pci_free_resource_list(&pcie->resources);
+}
+
+static int altera_pcie_parse_request_of_pci_ranges(struct altera_pcie *pcie)
+{
+ int err, res_valid = 0;
+ struct device *dev = &pcie->pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct resource_entry *win;
+
+ err = of_pci_get_host_bridge_resources(np, 0, 0xff, &pcie->resources,
+ NULL);
+ if (err)
+ return err;
+
+ resource_list_for_each_entry(win, &pcie->resources) {
+ struct resource *parent, *res = win->res;
+
+ switch (resource_type(res)) {
+ case IORESOURCE_MEM:
+ parent = &iomem_resource;
+ res_valid |= !(res->flags & IORESOURCE_PREFETCH);
+ break;
+ default:
+ continue;
+ }
+
+ err = devm_request_resource(dev, parent, res);
+ if (err)
+ goto out_release_res;
+ }
+
+ if (!res_valid) {
+ dev_err(dev, "non-prefetchable memory resource required\n");
+ err = -EINVAL;
+ goto out_release_res;
+ }
+
+ return 0;
+
+out_release_res:
+ altera_pcie_release_of_pci_ranges(pcie);
+ return err;
+}
+
+static int altera_pcie_init_irq_domain(struct altera_pcie *pcie)
+{
+ struct device *dev = &pcie->pdev->dev;
+ struct device_node *node = dev->of_node;
+
+ /* Setup INTx */
+ pcie->irq_domain = irq_domain_add_linear(node, INTX_NUM,
+ &intx_domain_ops, pcie);
+ if (!pcie->irq_domain) {
+ dev_err(dev, "Failed to get a INTx IRQ domain\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int altera_pcie_parse_dt(struct altera_pcie *pcie)
+{
+ struct resource *cra;
+ struct platform_device *pdev = pcie->pdev;
+
+ cra = platform_get_resource_byname(pdev, IORESOURCE_MEM, "Cra");
+ if (!cra) {
+ dev_err(&pdev->dev, "no Cra memory resource defined\n");
+ return -ENODEV;
+ }
+
+ pcie->cra_base = devm_ioremap_resource(&pdev->dev, cra);
+ if (IS_ERR(pcie->cra_base)) {
+ dev_err(&pdev->dev, "failed to map cra memory\n");
+ return PTR_ERR(pcie->cra_base);
+ }
+
+ /* setup IRQ */
+ pcie->irq = platform_get_irq(pdev, 0);
+ if (pcie->irq <= 0) {
+ dev_err(&pdev->dev, "failed to get IRQ: %d\n", pcie->irq);
+ return -EINVAL;
+ }
+
+ irq_set_chained_handler_and_data(pcie->irq, altera_pcie_isr, pcie);
+
+ return 0;
+}
+
+static int altera_pcie_probe(struct platform_device *pdev)
+{
+ struct altera_pcie *pcie;
+ struct pci_bus *bus;
+ struct pci_bus *child;
+ int ret;
+
+ pcie = devm_kzalloc(&pdev->dev, sizeof(*pcie), GFP_KERNEL);
+ if (!pcie)
+ return -ENOMEM;
+
+ pcie->pdev = pdev;
+
+ ret = altera_pcie_parse_dt(pcie);
+ if (ret) {
+ dev_err(&pdev->dev, "Parsing DT failed\n");
+ return ret;
+ }
+
+ INIT_LIST_HEAD(&pcie->resources);
+
+ ret = altera_pcie_parse_request_of_pci_ranges(pcie);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed add resources\n");
+ return ret;
+ }
+
+ ret = altera_pcie_init_irq_domain(pcie);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed creating IRQ Domain\n");
+ return ret;
+ }
+
+ /* clear all interrupts */
+ cra_writel(pcie, P2A_INT_STS_ALL, P2A_INT_STATUS);
+ /* enable all interrupts */
+ cra_writel(pcie, P2A_INT_ENA_ALL, P2A_INT_ENABLE);
+
+ bus = pci_scan_root_bus(&pdev->dev, pcie->root_bus_nr, &altera_pcie_ops,
+ pcie, &pcie->resources);
+ if (!bus)
+ return -ENOMEM;
+
+ pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
+ pci_assign_unassigned_bus_resources(bus);
+
+ /* Configure PCI Express setting. */
+ list_for_each_entry(child, &bus->children, node)
+ pcie_bus_configure_settings(child);
+
+ pci_bus_add_devices(bus);
+
+ platform_set_drvdata(pdev, pcie);
+ return ret;
+}
+
+static const struct of_device_id altera_pcie_of_match[] = {
+ { .compatible = "altr,pcie-root-port-1.0", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, altera_pcie_of_match);
+
+static struct platform_driver altera_pcie_driver = {
+ .probe = altera_pcie_probe,
+ .driver = {
+ .name = "altera-pcie",
+ .of_match_table = altera_pcie_of_match,
+ .suppress_bind_attrs = true,
+ },
+};
+
+static int altera_pcie_init(void)
+{
+ return platform_driver_register(&altera_pcie_driver);
+}
+module_init(altera_pcie_init);
+
+MODULE_AUTHOR("Ley Foon Tan <lftan@altera.com>");
+MODULE_DESCRIPTION("Altera PCIe host controller driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c
index 9aedc8eb2c6e..c9550dc8b8ed 100644
--- a/drivers/pci/host/pcie-iproc-platform.c
+++ b/drivers/pci/host/pcie-iproc-platform.c
@@ -54,6 +54,33 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
return -ENOMEM;
}
+ if (of_property_read_bool(np, "brcm,pcie-ob")) {
+ u32 val;
+
+ ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
+ &val);
+ if (ret) {
+ dev_err(pcie->dev,
+ "missing brcm,pcie-ob-axi-offset property\n");
+ return ret;
+ }
+ pcie->ob.axi_offset = val;
+
+ ret = of_property_read_u32(np, "brcm,pcie-ob-window-size",
+ &val);
+ if (ret) {
+ dev_err(pcie->dev,
+ "missing brcm,pcie-ob-window-size property\n");
+ return ret;
+ }
+ pcie->ob.window_size = (resource_size_t)val * SZ_1M;
+
+ if (of_property_read_bool(np, "brcm,pcie-ob-oarr-size"))
+ pcie->ob.set_oarr_size = true;
+
+ pcie->need_ob_cfg = true;
+ }
+
/* PHY use is optional */
pcie->phy = devm_phy_get(&pdev->dev, "pcie-phy");
if (IS_ERR(pcie->phy)) {
diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c
index fe2efb141a9b..eac719af16aa 100644
--- a/drivers/pci/host/pcie-iproc.c
+++ b/drivers/pci/host/pcie-iproc.c
@@ -1,6 +1,6 @@
/*
* Copyright (C) 2014 Hauke Mehrtens <hauke@hauke-m.de>
- * Copyright (C) 2015 Broadcom Corporatcommon ion
+ * Copyright (C) 2015 Broadcom Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
@@ -31,6 +31,8 @@
#include "pcie-iproc.h"
#define CLK_CONTROL_OFFSET 0x000
+#define EP_PERST_SOURCE_SELECT_SHIFT 2
+#define EP_PERST_SOURCE_SELECT BIT(EP_PERST_SOURCE_SELECT_SHIFT)
#define EP_MODE_SURVIVE_PERST_SHIFT 1
#define EP_MODE_SURVIVE_PERST BIT(EP_MODE_SURVIVE_PERST_SHIFT)
#define RC_PCIE_RST_OUTPUT_SHIFT 0
@@ -58,6 +60,24 @@
#define SYS_RC_INTX_EN 0x330
#define SYS_RC_INTX_MASK 0xf
+#define PCIE_LINK_STATUS_OFFSET 0xf0c
+#define PCIE_PHYLINKUP_SHIFT 3
+#define PCIE_PHYLINKUP BIT(PCIE_PHYLINKUP_SHIFT)
+#define PCIE_DL_ACTIVE_SHIFT 2
+#define PCIE_DL_ACTIVE BIT(PCIE_DL_ACTIVE_SHIFT)
+
+#define OARR_VALID_SHIFT 0
+#define OARR_VALID BIT(OARR_VALID_SHIFT)
+#define OARR_SIZE_CFG_SHIFT 1
+#define OARR_SIZE_CFG BIT(OARR_SIZE_CFG_SHIFT)
+
+#define OARR_LO(window) (0xd20 + (window) * 8)
+#define OARR_HI(window) (0xd24 + (window) * 8)
+#define OMAP_LO(window) (0xd40 + (window) * 8)
+#define OMAP_HI(window) (0xd44 + (window) * 8)
+
+#define MAX_NUM_OB_WINDOWS 2
+
static inline struct iproc_pcie *iproc_data(struct pci_bus *bus)
{
struct iproc_pcie *pcie;
@@ -119,23 +139,32 @@ static void iproc_pcie_reset(struct iproc_pcie *pcie)
u32 val;
/*
- * Configure the PCIe controller as root complex and send a downstream
- * reset
+ * Select perst_b signal as reset source. Put the device into reset,
+ * and then bring it out of reset
*/
- val = EP_MODE_SURVIVE_PERST | RC_PCIE_RST_OUTPUT;
+ val = readl(pcie->base + CLK_CONTROL_OFFSET);
+ val &= ~EP_PERST_SOURCE_SELECT & ~EP_MODE_SURVIVE_PERST &
+ ~RC_PCIE_RST_OUTPUT;
writel(val, pcie->base + CLK_CONTROL_OFFSET);
udelay(250);
- val &= ~EP_MODE_SURVIVE_PERST;
+
+ val |= RC_PCIE_RST_OUTPUT;
writel(val, pcie->base + CLK_CONTROL_OFFSET);
- msleep(250);
+ msleep(100);
}
static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus)
{
u8 hdr_type;
- u32 link_ctrl;
+ u32 link_ctrl, class, val;
u16 pos, link_status;
- int link_is_active = 0;
+ bool link_is_active = false;
+
+ val = readl(pcie->base + PCIE_LINK_STATUS_OFFSET);
+ if (!(val & PCIE_PHYLINKUP) || !(val & PCIE_DL_ACTIVE)) {
+ dev_err(pcie->dev, "PHY or data link is INACTIVE!\n");
+ return -ENODEV;
+ }
/* make sure we are not in EP mode */
pci_bus_read_config_byte(bus, 0, PCI_HEADER_TYPE, &hdr_type);
@@ -145,14 +174,19 @@ static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus)
}
/* force class to PCI_CLASS_BRIDGE_PCI (0x0604) */
- pci_bus_write_config_word(bus, 0, PCI_CLASS_DEVICE,
- PCI_CLASS_BRIDGE_PCI);
+#define PCI_BRIDGE_CTRL_REG_OFFSET 0x43c
+#define PCI_CLASS_BRIDGE_MASK 0xffff00
+#define PCI_CLASS_BRIDGE_SHIFT 8
+ pci_bus_read_config_dword(bus, 0, PCI_BRIDGE_CTRL_REG_OFFSET, &class);
+ class &= ~PCI_CLASS_BRIDGE_MASK;
+ class |= (PCI_CLASS_BRIDGE_PCI << PCI_CLASS_BRIDGE_SHIFT);
+ pci_bus_write_config_dword(bus, 0, PCI_BRIDGE_CTRL_REG_OFFSET, class);
/* check link status to see if link is active */
pos = pci_bus_find_capability(bus, 0, PCI_CAP_ID_EXP);
pci_bus_read_config_word(bus, 0, pos + PCI_EXP_LNKSTA, &link_status);
if (link_status & PCI_EXP_LNKSTA_NLW)
- link_is_active = 1;
+ link_is_active = true;
if (!link_is_active) {
/* try GEN 1 link speed */
@@ -176,7 +210,7 @@ static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus)
pci_bus_read_config_word(bus, 0, pos + PCI_EXP_LNKSTA,
&link_status);
if (link_status & PCI_EXP_LNKSTA_NLW)
- link_is_active = 1;
+ link_is_active = true;
}
}
@@ -190,6 +224,101 @@ static void iproc_pcie_enable(struct iproc_pcie *pcie)
writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN);
}
+/**
+ * Some iProc SoCs require the SW to configure the outbound address mapping
+ *
+ * Outbound address translation:
+ *
+ * iproc_pcie_address = axi_address - axi_offset
+ * OARR = iproc_pcie_address
+ * OMAP = pci_addr
+ *
+ * axi_addr -> iproc_pcie_address -> OARR -> OMAP -> pci_address
+ */
+static int iproc_pcie_setup_ob(struct iproc_pcie *pcie, u64 axi_addr,
+ u64 pci_addr, resource_size_t size)
+{
+ struct iproc_pcie_ob *ob = &pcie->ob;
+ unsigned i;
+ u64 max_size = (u64)ob->window_size * MAX_NUM_OB_WINDOWS;
+ u64 remainder;
+
+ if (size > max_size) {
+ dev_err(pcie->dev,
+ "res size 0x%pap exceeds max supported size 0x%llx\n",
+ &size, max_size);
+ return -EINVAL;
+ }
+
+ div64_u64_rem(size, ob->window_size, &remainder);
+ if (remainder) {
+ dev_err(pcie->dev,
+ "res size %pap needs to be multiple of window size %pap\n",
+ &size, &ob->window_size);
+ return -EINVAL;
+ }
+
+ if (axi_addr < ob->axi_offset) {
+ dev_err(pcie->dev,
+ "axi address %pap less than offset %pap\n",
+ &axi_addr, &ob->axi_offset);
+ return -EINVAL;
+ }
+
+ /*
+ * Translate the AXI address to the internal address used by the iProc
+ * PCIe core before programming the OARR
+ */
+ axi_addr -= ob->axi_offset;
+
+ for (i = 0; i < MAX_NUM_OB_WINDOWS; i++) {
+ writel(lower_32_bits(axi_addr) | OARR_VALID |
+ (ob->set_oarr_size ? 1 : 0), pcie->base + OARR_LO(i));
+ writel(upper_32_bits(axi_addr), pcie->base + OARR_HI(i));
+ writel(lower_32_bits(pci_addr), pcie->base + OMAP_LO(i));
+ writel(upper_32_bits(pci_addr), pcie->base + OMAP_HI(i));
+
+ size -= ob->window_size;
+ if (size == 0)
+ break;
+
+ axi_addr += ob->window_size;
+ pci_addr += ob->window_size;
+ }
+
+ return 0;
+}
+
+static int iproc_pcie_map_ranges(struct iproc_pcie *pcie,
+ struct list_head *resources)
+{
+ struct resource_entry *window;
+ int ret;
+
+ resource_list_for_each_entry(window, resources) {
+ struct resource *res = window->res;
+ u64 res_type = resource_type(res);
+
+ switch (res_type) {
+ case IORESOURCE_IO:
+ case IORESOURCE_BUS:
+ break;
+ case IORESOURCE_MEM:
+ ret = iproc_pcie_setup_ob(pcie, res->start,
+ res->start - window->offset,
+ resource_size(res));
+ if (ret)
+ return ret;
+ break;
+ default:
+ dev_err(pcie->dev, "invalid resource %pR\n", res);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
{
int ret;
@@ -213,6 +342,14 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
iproc_pcie_reset(pcie);
+ if (pcie->need_ob_cfg) {
+ ret = iproc_pcie_map_ranges(pcie, res);
+ if (ret) {
+ dev_err(pcie->dev, "map failed\n");
+ goto err_power_off_phy;
+ }
+ }
+
#ifdef CONFIG_ARM
pcie->sysdata.private_data = pcie;
sysdata = &pcie->sysdata;
@@ -238,9 +375,7 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
pci_scan_child_bus(bus);
pci_assign_unassigned_bus_resources(bus);
-#ifdef CONFIG_ARM
pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
-#endif
pci_bus_add_devices(bus);
return 0;
diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h
index c9e4c10a462e..d3dc940f773a 100644
--- a/drivers/pci/host/pcie-iproc.h
+++ b/drivers/pci/host/pcie-iproc.h
@@ -14,17 +14,30 @@
#ifndef _PCIE_IPROC_H
#define _PCIE_IPROC_H
-#define IPROC_PCIE_MAX_NUM_IRQS 6
+/**
+ * iProc PCIe outbound mapping
+ * @set_oarr_size: indicates the OARR size bit needs to be set
+ * @axi_offset: offset from the AXI address to the internal address used by
+ * the iProc PCIe core
+ * @window_size: outbound window size
+ */
+struct iproc_pcie_ob {
+ bool set_oarr_size;
+ resource_size_t axi_offset;
+ resource_size_t window_size;
+};
/**
* iProc PCIe device
* @dev: pointer to device data structure
* @base: PCIe host controller I/O register base
- * @resources: linked list of all PCI resources
* @sysdata: Per PCI controller data (ARM-specific)
* @root_bus: pointer to root bus
* @phy: optional PHY device that controls the Serdes
* @irqs: interrupt IDs
+ * @map_irq: function callback to map interrupts
+ * @need_ob_cfg: indidates SW needs to configure the outbound mapping window
+ * @ob: outbound mapping parameters
*/
struct iproc_pcie {
struct device *dev;
@@ -34,8 +47,9 @@ struct iproc_pcie {
#endif
struct pci_bus *root_bus;
struct phy *phy;
- int irqs[IPROC_PCIE_MAX_NUM_IRQS];
int (*map_irq)(const struct pci_dev *, u8, u8);
+ bool need_ob_cfg;
+ struct iproc_pcie_ob ob;
};
int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res);
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c
index 7678fe0820d7..f4fa6c537448 100644
--- a/drivers/pci/host/pcie-rcar.c
+++ b/drivers/pci/host/pcie-rcar.c
@@ -108,6 +108,8 @@
#define RCAR_PCI_MAX_RESOURCES 4
#define MAX_NR_INBOUND_MAPS 6
+static unsigned long global_io_offset;
+
struct rcar_msi {
DECLARE_BITMAP(used, INT_PCI_MSI_NR);
struct irq_domain *domain;
@@ -124,7 +126,16 @@ static inline struct rcar_msi *to_rcar_msi(struct msi_controller *chip)
}
/* Structure representing the PCIe interface */
+/*
+ * ARM pcibios functions expect the ARM struct pci_sys_data as the PCI
+ * sysdata. Add pci_sys_data as the first element in struct gen_pci so
+ * that when we use a gen_pci pointer as sysdata, it is also a pointer to
+ * a struct pci_sys_data.
+ */
struct rcar_pcie {
+#ifdef CONFIG_ARM
+ struct pci_sys_data sys;
+#endif
struct device *dev;
void __iomem *base;
struct resource res[RCAR_PCI_MAX_RESOURCES];
@@ -135,11 +146,6 @@ struct rcar_pcie {
struct rcar_msi msi;
};
-static inline struct rcar_pcie *sys_to_pcie(struct pci_sys_data *sys)
-{
- return sys->private_data;
-}
-
static void rcar_pci_write_reg(struct rcar_pcie *pcie, unsigned long val,
unsigned long reg)
{
@@ -258,7 +264,7 @@ static int rcar_pcie_config_access(struct rcar_pcie *pcie,
static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val)
{
- struct rcar_pcie *pcie = sys_to_pcie(bus->sysdata);
+ struct rcar_pcie *pcie = bus->sysdata;
int ret;
ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ,
@@ -283,7 +289,7 @@ static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn,
static int rcar_pcie_write_conf(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val)
{
- struct rcar_pcie *pcie = sys_to_pcie(bus->sysdata);
+ struct rcar_pcie *pcie = bus->sysdata;
int shift, ret;
u32 data;
@@ -353,13 +359,12 @@ static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie)
rcar_pci_write_reg(pcie, mask, PCIEPTCTLR(win));
}
-static int rcar_pcie_setup(int nr, struct pci_sys_data *sys)
+static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pcie)
{
- struct rcar_pcie *pcie = sys_to_pcie(sys);
struct resource *res;
int i;
- pcie->root_bus_nr = -1;
+ pcie->root_bus_nr = pcie->busn.start;
/* Setup PCI resources */
for (i = 0; i < RCAR_PCI_MAX_RESOURCES; i++) {
@@ -372,32 +377,53 @@ static int rcar_pcie_setup(int nr, struct pci_sys_data *sys)
if (res->flags & IORESOURCE_IO) {
phys_addr_t io_start = pci_pio_to_address(res->start);
- pci_ioremap_io(nr * SZ_64K, io_start);
- } else
- pci_add_resource(&sys->resources, res);
+ pci_ioremap_io(global_io_offset, io_start);
+ global_io_offset += SZ_64K;
+ }
+
+ pci_add_resource(resource, res);
}
- pci_add_resource(&sys->resources, &pcie->busn);
+ pci_add_resource(resource, &pcie->busn);
return 1;
}
-static struct hw_pci rcar_pci = {
- .setup = rcar_pcie_setup,
- .map_irq = of_irq_parse_and_map_pci,
- .ops = &rcar_pcie_ops,
-};
-
-static void rcar_pcie_enable(struct rcar_pcie *pcie)
+static int rcar_pcie_enable(struct rcar_pcie *pcie)
{
- struct platform_device *pdev = to_platform_device(pcie->dev);
+ struct pci_bus *bus, *child;
+ LIST_HEAD(res);
- rcar_pci.nr_controllers = 1;
- rcar_pci.private_data = (void **)&pcie;
-#ifdef CONFIG_PCI_MSI
- rcar_pci.msi_ctrl = &pcie->msi.chip;
-#endif
+ rcar_pcie_setup(&res, pcie);
+
+ /* Do not reassign resources if probe only */
+ if (!pci_has_flag(PCI_PROBE_ONLY))
+ pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS);
- pci_common_init_dev(&pdev->dev, &rcar_pci);
+ if (IS_ENABLED(CONFIG_PCI_MSI))
+ bus = pci_scan_root_bus_msi(pcie->dev, pcie->root_bus_nr,
+ &rcar_pcie_ops, pcie, &res, &pcie->msi.chip);
+ else
+ bus = pci_scan_root_bus(pcie->dev, pcie->root_bus_nr,
+ &rcar_pcie_ops, pcie, &res);
+
+ if (!bus) {
+ dev_err(pcie->dev, "Scanning rootbus failed");
+ return -ENODEV;
+ }
+
+ pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
+
+ if (!pci_has_flag(PCI_PROBE_ONLY)) {
+ pci_bus_size_bridges(bus);
+ pci_bus_assign_resources(bus);
+
+ list_for_each_entry(child, &bus->children, node)
+ pcie_bus_configure_settings(child);
+ }
+
+ pci_bus_add_devices(bus);
+
+ return 0;
}
static int phy_wait_for_ack(struct rcar_pcie *pcie)
@@ -970,9 +996,7 @@ static int rcar_pcie_probe(struct platform_device *pdev)
data = rcar_pci_read_reg(pcie, MACSR);
dev_info(&pdev->dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f);
- rcar_pcie_enable(pcie);
-
- return 0;
+ return rcar_pcie_enable(pcie);
}
static struct platform_driver rcar_pcie_driver = {
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 12:07:03 +0100