#include "pcie-designware.h"
static struct pci_ops dw_pcie_ops;
-
-static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
- u32 *val)
-{
- struct dw_pcie *pci;
-
- if (pp->ops->rd_own_conf)
- return pp->ops->rd_own_conf(pp, where, size, val);
-
- pci = to_dw_pcie_from_pp(pp);
- return dw_pcie_read(pci->dbi_base + where, size, val);
-}
-
-static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
- u32 val)
-{
- struct dw_pcie *pci;
-
- if (pp->ops->wr_own_conf)
- return pp->ops->wr_own_conf(pp, where, size, val);
-
- pci = to_dw_pcie_from_pp(pp);
- return dw_pcie_write(pci->dbi_base + where, size, val);
-}
+static struct pci_ops dw_child_pcie_ops;
static void dw_msi_ack_irq(struct irq_data *d)
{
unsigned long val;
u32 status, num_ctrls;
irqreturn_t ret = IRQ_NONE;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
for (i = 0; i < num_ctrls; i++) {
- dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS +
- (i * MSI_REG_CTRL_BLOCK_SIZE),
- 4, &status);
+ status = dw_pcie_readl_dbi(pci, PCIE_MSI_INTR0_STATUS +
+ (i * MSI_REG_CTRL_BLOCK_SIZE));
if (!status)
continue;
static void dw_pci_bottom_mask(struct irq_data *d)
{
struct pcie_port *pp = irq_data_get_irq_chip_data(d);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
unsigned int res, bit, ctrl;
unsigned long flags;
bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
pp->irq_mask[ctrl] |= BIT(bit);
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_MASK + res, 4,
- pp->irq_mask[ctrl]);
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK + res, pp->irq_mask[ctrl]);
raw_spin_unlock_irqrestore(&pp->lock, flags);
}
static void dw_pci_bottom_unmask(struct irq_data *d)
{
struct pcie_port *pp = irq_data_get_irq_chip_data(d);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
unsigned int res, bit, ctrl;
unsigned long flags;
bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
pp->irq_mask[ctrl] &= ~BIT(bit);
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_MASK + res, 4,
- pp->irq_mask[ctrl]);
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK + res, pp->irq_mask[ctrl]);
raw_spin_unlock_irqrestore(&pp->lock, flags);
}
static void dw_pci_bottom_ack(struct irq_data *d)
{
struct pcie_port *pp = irq_data_get_irq_chip_data(d);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
unsigned int res, bit, ctrl;
ctrl = d->hwirq / MAX_MSI_IRQS_PER_CTRL;
res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS + res, 4, BIT(bit));
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_STATUS + res, BIT(bit));
}
static struct irq_chip dw_pci_msi_bottom_irq_chip = {
irq_domain_remove(pp->msi_domain);
irq_domain_remove(pp->irq_domain);
- if (pp->msi_page)
- __free_page(pp->msi_page);
+ if (pp->msi_data) {
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct device *dev = pci->dev;
+
+ dma_unmap_single_attrs(dev, pp->msi_data, sizeof(pp->msi_msg),
+ DMA_FROM_DEVICE, DMA_ATTR_SKIP_CPU_SYNC);
+ }
}
void dw_pcie_msi_init(struct pcie_port *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct device *dev = pci->dev;
- u64 msi_target;
+ u64 msi_target = (u64)pp->msi_data;
- pp->msi_page = alloc_page(GFP_KERNEL);
- pp->msi_data = dma_map_page(dev, pp->msi_page, 0, PAGE_SIZE,
- DMA_FROM_DEVICE);
- if (dma_mapping_error(dev, pp->msi_data)) {
- dev_err(dev, "Failed to map MSI data\n");
- __free_page(pp->msi_page);
- pp->msi_page = NULL;
+ if (!IS_ENABLED(CONFIG_PCI_MSI))
return;
- }
- msi_target = (u64)pp->msi_data;
/* Program the msi_data */
- dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
- lower_32_bits(msi_target));
- dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
- upper_32_bits(msi_target));
+ dw_pcie_writel_dbi(pci, PCIE_MSI_ADDR_LO, lower_32_bits(msi_target));
+ dw_pcie_writel_dbi(pci, PCIE_MSI_ADDR_HI, upper_32_bits(msi_target));
}
EXPORT_SYMBOL_GPL(dw_pcie_msi_init);
struct device_node *np = dev->of_node;
struct platform_device *pdev = to_platform_device(dev);
struct resource_entry *win;
- struct pci_bus *child;
struct pci_host_bridge *bridge;
struct resource *cfg_res;
- u32 hdr_type;
int ret;
raw_spin_lock_init(&pci->pp.lock);
cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
if (cfg_res) {
- pp->cfg0_size = resource_size(cfg_res) >> 1;
- pp->cfg1_size = resource_size(cfg_res) >> 1;
+ pp->cfg0_size = resource_size(cfg_res);
pp->cfg0_base = cfg_res->start;
- pp->cfg1_base = cfg_res->start + pp->cfg0_size;
} else if (!pp->va_cfg0_base) {
dev_err(dev, "Missing *config* reg space\n");
}
if (!bridge)
return -ENOMEM;
+ pp->bridge = bridge;
+
/* Get the I/O and memory ranges from DT */
resource_list_for_each_entry(win, &bridge->windows) {
switch (resource_type(win->res)) {
case IORESOURCE_IO:
- pp->io = win->res;
- pp->io->name = "I/O";
- pp->io_size = resource_size(pp->io);
- pp->io_bus_addr = pp->io->start - win->offset;
- pp->io_base = pci_pio_to_address(pp->io->start);
- break;
- case IORESOURCE_MEM:
- pp->mem = win->res;
- pp->mem->name = "MEM";
- pp->mem_size = resource_size(pp->mem);
- pp->mem_bus_addr = pp->mem->start - win->offset;
+ pp->io_size = resource_size(win->res);
+ pp->io_bus_addr = win->res->start - win->offset;
+ pp->io_base = pci_pio_to_address(win->res->start);
break;
case 0:
- pp->cfg = win->res;
- pp->cfg0_size = resource_size(pp->cfg) >> 1;
- pp->cfg1_size = resource_size(pp->cfg) >> 1;
- pp->cfg0_base = pp->cfg->start;
- pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
- break;
- case IORESOURCE_BUS:
- pp->busn = win->res;
+ dev_err(dev, "Missing *config* reg space\n");
+ pp->cfg0_size = resource_size(win->res);
+ pp->cfg0_base = win->res->start;
+ if (!pci->dbi_base) {
+ pci->dbi_base = devm_pci_remap_cfgspace(dev,
+ pp->cfg0_base,
+ pp->cfg0_size);
+ if (!pci->dbi_base) {
+ dev_err(dev, "Error with ioremap\n");
+ return -ENOMEM;
+ }
+ }
break;
}
}
- if (!pci->dbi_base) {
- pci->dbi_base = devm_pci_remap_cfgspace(dev,
- pp->cfg->start,
- resource_size(pp->cfg));
- if (!pci->dbi_base) {
- dev_err(dev, "Error with ioremap\n");
- return -ENOMEM;
- }
- }
-
- pp->mem_base = pp->mem->start;
-
if (!pp->va_cfg0_base) {
pp->va_cfg0_base = devm_pci_remap_cfgspace(dev,
pp->cfg0_base, pp->cfg0_size);
}
}
- if (!pp->va_cfg1_base) {
- pp->va_cfg1_base = devm_pci_remap_cfgspace(dev,
- pp->cfg1_base,
- pp->cfg1_size);
- if (!pp->va_cfg1_base) {
- dev_err(dev, "Error with ioremap\n");
- return -ENOMEM;
- }
- }
-
ret = of_property_read_u32(np, "num-viewport", &pci->num_viewport);
if (ret)
pci->num_viewport = 2;
+ if (pci->link_gen < 1)
+ pci->link_gen = of_pci_get_max_link_speed(np);
+
if (pci_msi_enabled()) {
/*
* If a specific SoC driver needs to change the
irq_set_chained_handler_and_data(pp->msi_irq,
dw_chained_msi_isr,
pp);
+
+ pp->msi_data = dma_map_single_attrs(pci->dev, &pp->msi_msg,
+ sizeof(pp->msi_msg),
+ DMA_FROM_DEVICE,
+ DMA_ATTR_SKIP_CPU_SYNC);
+ if (dma_mapping_error(pci->dev, pp->msi_data)) {
+ dev_err(pci->dev, "Failed to map MSI data\n");
+ pp->msi_data = 0;
+ goto err_free_msi;
+ }
} else {
ret = pp->ops->msi_host_init(pp);
if (ret < 0)
}
}
+ /* Set default bus ops */
+ bridge->ops = &dw_pcie_ops;
+ bridge->child_ops = &dw_child_pcie_ops;
+
if (pp->ops->host_init) {
ret = pp->ops->host_init(pp);
if (ret)
goto err_free_msi;
}
- ret = dw_pcie_rd_own_conf(pp, PCI_HEADER_TYPE, 1, &hdr_type);
- if (ret != PCIBIOS_SUCCESSFUL) {
- dev_err(pci->dev, "Failed reading PCI_HEADER_TYPE cfg space reg (ret: 0x%x)\n",
- ret);
- ret = pcibios_err_to_errno(ret);
- goto err_free_msi;
- }
- if (hdr_type != PCI_HEADER_TYPE_BRIDGE) {
- dev_err(pci->dev,
- "PCIe controller is not set to bridge type (hdr_type: 0x%x)!\n",
- hdr_type);
- ret = -EIO;
- goto err_free_msi;
- }
-
bridge->sysdata = pp;
- bridge->ops = &dw_pcie_ops;
-
- ret = pci_scan_root_bus_bridge(bridge);
- if (ret)
- goto err_free_msi;
-
- pp->root_bus = bridge->bus;
-
- if (pp->ops->scan_bus)
- pp->ops->scan_bus(pp);
- pci_bus_size_bridges(pp->root_bus);
- pci_bus_assign_resources(pp->root_bus);
-
- list_for_each_entry(child, &pp->root_bus->children, node)
- pcie_bus_configure_settings(child);
-
- pci_bus_add_devices(pp->root_bus);
- return 0;
+ ret = pci_host_probe(bridge);
+ if (!ret)
+ return 0;
err_free_msi:
if (pci_msi_enabled() && !pp->ops->msi_host_init)
void dw_pcie_host_deinit(struct pcie_port *pp)
{
- pci_stop_root_bus(pp->root_bus);
- pci_remove_root_bus(pp->root_bus);
+ pci_stop_root_bus(pp->bridge->bus);
+ pci_remove_root_bus(pp->bridge->bus);
if (pci_msi_enabled() && !pp->ops->msi_host_init)
dw_pcie_free_msi(pp);
}
EXPORT_SYMBOL_GPL(dw_pcie_host_deinit);
-static int dw_pcie_access_other_conf(struct pcie_port *pp, struct pci_bus *bus,
- u32 devfn, int where, int size, u32 *val,
- bool write)
+static void __iomem *dw_pcie_other_conf_map_bus(struct pci_bus *bus,
+ unsigned int devfn, int where)
{
- int ret, type;
- u32 busdev, cfg_size;
- u64 cpu_addr;
- void __iomem *va_cfg_base;
+ int type;
+ u32 busdev;
+ struct pcie_port *pp = bus->sysdata;
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ /*
+ * Checking whether the link is up here is a last line of defense
+ * against platforms that forward errors on the system bus as
+ * SError upon PCI configuration transactions issued when the link
+ * is down. This check is racy by definition and does not stop
+ * the system from triggering an SError if the link goes down
+ * after this check is performed.
+ */
+ if (!dw_pcie_link_up(pci))
+ return NULL;
+
busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
PCIE_ATU_FUNC(PCI_FUNC(devfn));
- if (pci_is_root_bus(bus->parent)) {
+ if (pci_is_root_bus(bus->parent))
type = PCIE_ATU_TYPE_CFG0;
- cpu_addr = pp->cfg0_base;
- cfg_size = pp->cfg0_size;
- va_cfg_base = pp->va_cfg0_base;
- } else {
- type = PCIE_ATU_TYPE_CFG1;
- cpu_addr = pp->cfg1_base;
- cfg_size = pp->cfg1_size;
- va_cfg_base = pp->va_cfg1_base;
- }
-
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
- type, cpu_addr,
- busdev, cfg_size);
- if (write)
- ret = dw_pcie_write(va_cfg_base + where, size, *val);
else
- ret = dw_pcie_read(va_cfg_base + where, size, val);
-
- if (pci->num_viewport <= 2)
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
- PCIE_ATU_TYPE_IO, pp->io_base,
- pp->io_bus_addr, pp->io_size);
-
- return ret;
-}
-
-static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
- u32 devfn, int where, int size, u32 *val)
-{
- if (pp->ops->rd_other_conf)
- return pp->ops->rd_other_conf(pp, bus, devfn, where,
- size, val);
+ type = PCIE_ATU_TYPE_CFG1;
- return dw_pcie_access_other_conf(pp, bus, devfn, where, size, val,
- false);
-}
-static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
- u32 devfn, int where, int size, u32 val)
-{
- if (pp->ops->wr_other_conf)
- return pp->ops->wr_other_conf(pp, bus, devfn, where,
- size, val);
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
+ type, pp->cfg0_base,
+ busdev, pp->cfg0_size);
- return dw_pcie_access_other_conf(pp, bus, devfn, where, size, &val,
- true);
+ return pp->va_cfg0_base + where;
}
-static int dw_pcie_valid_device(struct pcie_port *pp, struct pci_bus *bus,
- int dev)
+static int dw_pcie_rd_other_conf(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 *val)
{
+ int ret;
+ struct pcie_port *pp = bus->sysdata;
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- /* If there is no link, then there is no device */
- if (!pci_is_root_bus(bus)) {
- if (!dw_pcie_link_up(pci))
- return 0;
- } else if (dev > 0)
- /* Access only one slot on each root port */
- return 0;
+ ret = pci_generic_config_read(bus, devfn, where, size, val);
- return 1;
+ if (!ret && pci->num_viewport <= 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
+ PCIE_ATU_TYPE_IO, pp->io_base,
+ pp->io_bus_addr, pp->io_size);
+
+ return ret;
}
-static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
- int size, u32 *val)
+static int dw_pcie_wr_other_conf(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 val)
{
+ int ret;
struct pcie_port *pp = bus->sysdata;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn))) {
- *val = 0xffffffff;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
+ ret = pci_generic_config_write(bus, devfn, where, size, val);
- if (pci_is_root_bus(bus))
- return dw_pcie_rd_own_conf(pp, where, size, val);
+ if (!ret && pci->num_viewport <= 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
+ PCIE_ATU_TYPE_IO, pp->io_base,
+ pp->io_bus_addr, pp->io_size);
- return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val);
+ return ret;
}
-static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
- int where, int size, u32 val)
+static struct pci_ops dw_child_pcie_ops = {
+ .map_bus = dw_pcie_other_conf_map_bus,
+ .read = dw_pcie_rd_other_conf,
+ .write = dw_pcie_wr_other_conf,
+};
+
+void __iomem *dw_pcie_own_conf_map_bus(struct pci_bus *bus, unsigned int devfn, int where)
{
struct pcie_port *pp = bus->sysdata;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn)))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- if (pci_is_root_bus(bus))
- return dw_pcie_wr_own_conf(pp, where, size, val);
+ if (PCI_SLOT(devfn) > 0)
+ return NULL;
- return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val);
+ return pci->dbi_base + where;
}
+EXPORT_SYMBOL_GPL(dw_pcie_own_conf_map_bus);
static struct pci_ops dw_pcie_ops = {
- .read = dw_pcie_rd_conf,
- .write = dw_pcie_wr_conf,
+ .map_bus = dw_pcie_own_conf_map_bus,
+ .read = pci_generic_config_read,
+ .write = pci_generic_config_write,
};
void dw_pcie_setup_rc(struct pcie_port *pp)
dw_pcie_setup(pci);
- if (!pp->ops->msi_host_init) {
+ if (pci_msi_enabled() && !pp->ops->msi_host_init) {
num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
/* Initialize IRQ Status array */
for (ctrl = 0; ctrl < num_ctrls; ctrl++) {
pp->irq_mask[ctrl] = ~0;
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_MASK +
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK +
(ctrl * MSI_REG_CTRL_BLOCK_SIZE),
- 4, pp->irq_mask[ctrl]);
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE +
+ pp->irq_mask[ctrl]);
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_ENABLE +
(ctrl * MSI_REG_CTRL_BLOCK_SIZE),
- 4, ~0);
+ ~0);
}
}
dw_pcie_writel_dbi(pci, PCI_COMMAND, val);
/*
- * If the platform provides ->rd_other_conf, it means the platform
- * uses its own address translation component rather than ATU, so
- * we should not program the ATU here.
+ * If the platform provides its own child bus config accesses, it means
+ * the platform uses its own address translation component rather than
+ * ATU, so we should not program the ATU here.
*/
- if (!pp->ops->rd_other_conf) {
+ if (pp->bridge->child_ops == &dw_child_pcie_ops) {
+ struct resource_entry *entry =
+ resource_list_first_type(&pp->bridge->windows, IORESOURCE_MEM);
+
dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX0,
- PCIE_ATU_TYPE_MEM, pp->mem_base,
- pp->mem_bus_addr, pp->mem_size);
+ PCIE_ATU_TYPE_MEM, entry->res->start,
+ entry->res->start - entry->offset,
+ resource_size(entry->res));
if (pci->num_viewport > 2)
dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX2,
PCIE_ATU_TYPE_IO, pp->io_base,
pp->io_bus_addr, pp->io_size);
}
- dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0);
/* Program correct class for RC */
- dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);
+ dw_pcie_writew_dbi(pci, PCI_CLASS_DEVICE, PCI_CLASS_BRIDGE_PCI);
- dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val);
+ val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
val |= PORT_LOGIC_SPEED_CHANGE;
- dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
+ dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
dw_pcie_dbi_ro_wr_dis(pci);
}
projects / linux-2.6-microblaze.git / blobdiff