From 9370bb92b2d16684ee45cf24e879c93c509162da Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 19 Dec 2024 01:47:39 +0000
Subject: [PATCH] add wifi6 8852be driver
---
kernel/drivers/pci/controller/dwc/pcie-designware-host.c | 554 ++++++++++++++++++++----------------------------------
1 files changed, 206 insertions(+), 348 deletions(-)
diff --git a/kernel/drivers/pci/controller/dwc/pcie-designware-host.c b/kernel/drivers/pci/controller/dwc/pcie-designware-host.c
index 395d72e..1cb04f4 100644
--- a/kernel/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/kernel/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -3,13 +3,14 @@
* Synopsys DesignWare PCIe host controller driver
*
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
+ * https://www.samsung.com
*
* Author: Jingoo Han <jg1.han@samsung.com>
*/
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
+#include <linux/msi.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
#include <linux/pci_regs.h>
@@ -19,30 +20,7 @@
#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)
{
@@ -81,13 +59,13 @@
unsigned long val;
u32 status, num_ctrls;
irqreturn_t ret = IRQ_NONE;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
num_ctrls = DIV_ROUND_UP(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;
@@ -106,6 +84,7 @@
return ret;
}
+EXPORT_SYMBOL_GPL(dw_handle_msi_irq);
/* Chained MSI interrupt service routine */
static void dw_chained_msi_isr(struct irq_desc *desc)
@@ -121,77 +100,63 @@
chained_irq_exit(chip, desc);
}
-static void dw_pci_setup_msi_msg(struct irq_data *data, struct msi_msg *msg)
+static void dw_pci_setup_msi_msg(struct irq_data *d, struct msi_msg *msg)
{
- struct pcie_port *pp = irq_data_get_irq_chip_data(data);
+ struct pcie_port *pp = irq_data_get_irq_chip_data(d);
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
u64 msi_target;
- if (pp->ops->get_msi_addr)
- msi_target = pp->ops->get_msi_addr(pp);
- else
- msi_target = (u64)pp->msi_data;
+ msi_target = (u64)pp->msi_data;
msg->address_lo = lower_32_bits(msi_target);
msg->address_hi = upper_32_bits(msi_target);
- if (pp->ops->get_msi_data)
- msg->data = pp->ops->get_msi_data(pp, data->hwirq);
- else
- msg->data = data->hwirq;
+ msg->data = d->hwirq;
dev_dbg(pci->dev, "msi#%d address_hi %#x address_lo %#x\n",
- (int)data->hwirq, msg->address_hi, msg->address_lo);
+ (int)d->hwirq, msg->address_hi, msg->address_lo);
}
-static int dw_pci_msi_set_affinity(struct irq_data *irq_data,
+static int dw_pci_msi_set_affinity(struct irq_data *d,
const struct cpumask *mask, bool force)
{
return -EINVAL;
}
-static void dw_pci_bottom_mask(struct irq_data *data)
+static void dw_pci_bottom_mask(struct irq_data *d)
{
- struct pcie_port *pp = irq_data_get_irq_chip_data(data);
+ 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;
raw_spin_lock_irqsave(&pp->lock, flags);
- if (pp->ops->msi_clear_irq) {
- pp->ops->msi_clear_irq(pp, data->hwirq);
- } else {
- ctrl = data->hwirq / MAX_MSI_IRQS_PER_CTRL;
- res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
- bit = data->hwirq % MAX_MSI_IRQS_PER_CTRL;
+ ctrl = d->hwirq / MAX_MSI_IRQS_PER_CTRL;
+ res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
+ bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
- pp->irq_status[ctrl] &= ~(1 << bit);
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_MASK + res, 4,
- ~pp->irq_status[ctrl]);
- }
+ pp->irq_mask[ctrl] |= BIT(bit);
+ 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 *data)
+static void dw_pci_bottom_unmask(struct irq_data *d)
{
- struct pcie_port *pp = irq_data_get_irq_chip_data(data);
+ 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;
raw_spin_lock_irqsave(&pp->lock, flags);
- if (pp->ops->msi_set_irq) {
- pp->ops->msi_set_irq(pp, data->hwirq);
- } else {
- ctrl = data->hwirq / MAX_MSI_IRQS_PER_CTRL;
- res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
- bit = data->hwirq % MAX_MSI_IRQS_PER_CTRL;
+ ctrl = d->hwirq / MAX_MSI_IRQS_PER_CTRL;
+ res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
+ bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
- pp->irq_status[ctrl] |= 1 << bit;
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_MASK + res, 4,
- ~pp->irq_status[ctrl]);
- }
+ pp->irq_mask[ctrl] &= ~BIT(bit);
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK + res, pp->irq_mask[ctrl]);
raw_spin_unlock_irqrestore(&pp->lock, flags);
}
@@ -199,21 +164,14 @@
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;
- unsigned long flags;
ctrl = d->hwirq / MAX_MSI_IRQS_PER_CTRL;
res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
- raw_spin_lock_irqsave(&pp->lock, flags);
-
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS + res, 4, 1 << bit);
-
- if (pp->ops->msi_irq_ack)
- pp->ops->msi_irq_ack(d->hwirq, pp);
-
- raw_spin_unlock_irqrestore(&pp->lock, flags);
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_STATUS + res, BIT(bit));
}
static struct irq_chip dw_pci_msi_bottom_irq_chip = {
@@ -246,7 +204,7 @@
for (i = 0; i < nr_irqs; i++)
irq_domain_set_info(domain, virq + i, bit + i,
- &dw_pci_msi_bottom_irq_chip,
+ pp->msi_irq_chip,
pp, handle_edge_irq,
NULL, NULL);
@@ -256,13 +214,13 @@
static void dw_pcie_irq_domain_free(struct irq_domain *domain,
unsigned int virq, unsigned int nr_irqs)
{
- struct irq_data *data = irq_domain_get_irq_data(domain, virq);
- struct pcie_port *pp = irq_data_get_irq_chip_data(data);
+ struct irq_data *d = irq_domain_get_irq_data(domain, virq);
+ struct pcie_port *pp = domain->host_data;
unsigned long flags;
raw_spin_lock_irqsave(&pp->lock, flags);
- bitmap_release_region(pp->msi_irq_in_use, data->hwirq,
+ bitmap_release_region(pp->msi_irq_in_use, d->hwirq,
order_base_2(nr_irqs));
raw_spin_unlock_irqrestore(&pp->lock, flags);
@@ -277,10 +235,6 @@
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct fwnode_handle *fwnode = of_node_to_fwnode(pci->dev->of_node);
-
- /* Rely on the external MSI domain */
- if (pp->msi_ext)
- return 0;
pp->irq_domain = irq_domain_create_linear(fwnode, pp->num_vectors,
&dw_pcie_msi_domain_ops, pp);
@@ -305,42 +259,36 @@
void dw_pcie_free_msi(struct pcie_port *pp)
{
- if (pp->msi_ext)
- return;
-
- irq_set_chained_handler(pp->msi_irq, NULL);
- irq_set_handler_data(pp->msi_irq, NULL);
+ if (pp->msi_irq) {
+ irq_set_chained_handler(pp->msi_irq, NULL);
+ irq_set_handler_data(pp->msi_irq, NULL);
+ }
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);
int dw_pcie_host_init(struct pcie_port *pp)
{
@@ -348,8 +296,7 @@
struct device *dev = pci->dev;
struct device_node *np = dev->of_node;
struct platform_device *pdev = to_platform_device(dev);
- struct resource_entry *win, *tmp;
- struct pci_bus *bus, *child;
+ struct resource_entry *win;
struct pci_host_bridge *bridge;
struct resource *cfg_res;
int ret;
@@ -358,10 +305,8 @@
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");
}
@@ -371,78 +316,37 @@
return -ENOMEM;
pp->bridge = bridge;
- ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
- &bridge->windows, &pp->io_base);
- if (ret)
- return ret;
-
- ret = devm_request_pci_bus_resources(dev, &bridge->windows);
- if (ret)
- return ret;
/* Get the I/O and memory ranges from DT */
- resource_list_for_each_entry_safe(win, tmp, &bridge->windows) {
+ resource_list_for_each_entry(win, &bridge->windows) {
switch (resource_type(win->res)) {
case IORESOURCE_IO:
- ret = devm_pci_remap_iospace(dev, win->res,
- pp->io_base);
- if (ret) {
- dev_warn(dev, "Error %d: failed to map resource %pR\n",
- ret, win->res);
- resource_list_destroy_entry(win);
- } else {
- 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;
- }
- 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_cfg0_base) {
dev_err(dev, "Error with ioremap in function\n");
- return -ENOMEM;
- }
- }
-
- 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;
}
}
@@ -454,8 +358,7 @@
if (pci->link_gen < 1)
pci->link_gen = of_pci_get_max_link_speed(np);
- if (pci_msi_enabled() &&
- !pp->msi_ext) {
+ if (pci_msi_enabled()) {
/*
* If a specific SoC driver needs to change the
* default number of vectors, it needs to implement
@@ -475,6 +378,8 @@
}
if (!pp->ops->msi_host_init) {
+ pp->msi_irq_chip = &dw_pci_msi_bottom_irq_chip;
+
ret = dw_pcie_allocate_domains(pp);
if (ret)
return ret;
@@ -483,6 +388,17 @@
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);
+ ret = dma_mapping_error(pci->dev, pp->msi_data);
+ if (ret) {
+ 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)
@@ -490,206 +406,153 @@
}
}
+ /* 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;
}
- pp->root_bus_nr = pp->busn->start;
-
- bridge->dev.parent = dev;
bridge->sysdata = pp;
- bridge->busnr = pp->root_bus_nr;
- bridge->ops = &dw_pcie_ops;
- bridge->map_irq = of_irq_parse_and_map_pci;
- bridge->swizzle_irq = pci_common_swizzle;
- ret = pci_scan_root_bus_bridge(bridge);
- if (ret)
- goto err_free_msi;
-
- bus = bridge->bus;
-
- if (pp->ops->scan_bus)
- pp->ops->scan_bus(pp);
-
- 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;
+ ret = pci_host_probe(bridge);
+ if (!ret)
+ return 0;
err_free_msi:
if (pci_msi_enabled() && !pp->ops->msi_host_init)
dw_pcie_free_msi(pp);
return ret;
}
+EXPORT_SYMBOL_GPL(dw_pcie_host_init);
-static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
- u32 devfn, int where, int size, u32 *val)
+void dw_pcie_host_deinit(struct pcie_port *pp)
{
- int ret, type;
- u32 busdev, cfg_size;
- u64 cpu_addr;
- void __iomem *va_cfg_base;
+ 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 void __iomem *dw_pcie_other_conf_map_bus(struct pci_bus *bus,
+ unsigned int devfn, int where)
+{
+ int type;
+ u32 busdev;
+ struct pcie_port *pp = bus->sysdata;
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- if (pp->ops->rd_other_conf)
- return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
+ /*
+ * 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 (bus->parent->number == pp->root_bus_nr) {
+ 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 {
+ 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, 0,
- type, cpu_addr,
- busdev, cfg_size);
- ret = dw_pcie_read(va_cfg_base + where, size, val);
- if (!ret && pci->io_cfg_atu_shared)
- dw_pcie_prog_outbound_atu(pci, 0,
- PCIE_ATU_TYPE_IO, pp->io_base,
- pp->io_bus_addr, pp->io_size);
- return ret;
+ dw_pcie_prog_outbound_atu(pci, 0, type, pp->cfg0_base, busdev, pp->cfg0_size);
+
+ return pp->va_cfg0_base + where;
}
-static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
- u32 devfn, int where, int size, u32 val)
+static int dw_pcie_rd_other_conf(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 *val)
{
- int ret, type;
- u32 busdev, cfg_size;
- u64 cpu_addr;
- void __iomem *va_cfg_base;
+ int ret;
+ struct pcie_port *pp = bus->sysdata;
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- if (pp->ops->wr_other_conf)
- return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
+ ret = pci_generic_config_read(bus, devfn, where, size, val);
- busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
- PCIE_ATU_FUNC(PCI_FUNC(devfn));
-
- if (bus->parent->number == pp->root_bus_nr) {
- 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, 0,
- type, cpu_addr,
- busdev, cfg_size);
- ret = dw_pcie_write(va_cfg_base + where, size, val);
- if (!ret && pci->io_cfg_atu_shared)
+ if (!ret && (pci->iatu_unroll_enabled & DWC_IATU_IOCFG_SHARED))
dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_IO, pp->io_base,
pp->io_bus_addr, pp->io_size);
return ret;
}
-static int dw_pcie_valid_device(struct pcie_port *pp, struct pci_bus *bus,
- int dev)
+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 there is no link, then there is no device */
- if (bus->number != pp->root_bus_nr) {
- if (!dw_pcie_link_up(pci))
- return 0;
- }
+ ret = pci_generic_config_write(bus, devfn, where, size, val);
- /* Access only one slot on each root port */
- if (bus->number == pp->root_bus_nr && dev > 0)
- return 0;
+ if (!ret && (pci->iatu_unroll_enabled & DWC_IATU_IOCFG_SHARED))
+ dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_IO, pp->io_base,
+ pp->io_bus_addr, pp->io_size);
- return 1;
+ return ret;
}
-static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
- int size, u32 *val)
-{
- struct pcie_port *pp = bus->sysdata;
-
- if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn))) {
- *val = 0xffffffff;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
-
- if (bus->number == pp->root_bus_nr)
- return dw_pcie_rd_own_conf(pp, where, size, val);
-
- return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val);
-}
-
-static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
- int where, int size, u32 val)
-{
- struct pcie_port *pp = bus->sysdata;
-
- if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn)))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- if (bus->number == pp->root_bus_nr)
- return dw_pcie_wr_own_conf(pp, where, size, val);
-
- return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val);
-}
-
-static struct pci_ops dw_pcie_ops = {
- .read = dw_pcie_rd_conf,
- .write = dw_pcie_wr_conf,
+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,
};
-static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
+void __iomem *dw_pcie_own_conf_map_bus(struct pci_bus *bus, unsigned int devfn, int where)
{
- u32 val;
+ struct pcie_port *pp = bus->sysdata;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT);
- if (val == 0xffffffff)
- return 1;
+ if (PCI_SLOT(devfn) > 0)
+ return NULL;
- return 0;
+ return pci->dbi_base + where;
}
+EXPORT_SYMBOL_GPL(dw_pcie_own_conf_map_bus);
+
+static struct pci_ops dw_pcie_ops = {
+ .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)
{
u32 val, ctrl, num_ctrls;
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- int atu_idx = 0;
- struct resource_entry *entry, *tmp;
+
+ /*
+ * Enable DBI read-only registers for writing/updating configuration.
+ * Write permission gets disabled towards the end of this function.
+ */
+ dw_pcie_dbi_ro_wr_en(pci);
dw_pcie_setup(pci);
- num_ctrls = DIV_ROUND_UP(pp->num_vectors, MAX_MSI_IRQS_PER_CTRL);
+ if (pci_msi_enabled() && !pp->ops->msi_host_init) {
+ num_ctrls = DIV_ROUND_UP(pp->num_vectors, MAX_MSI_IRQS_PER_CTRL);
- /* Initialize IRQ Status array */
- for (ctrl = 0; ctrl < num_ctrls; ctrl++) {
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_MASK +
- (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
- 4, ~0);
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE +
- (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
- 4, ~0);
- pp->irq_status[ctrl] = 0;
+ /* Initialize IRQ Status array */
+ for (ctrl = 0; ctrl < num_ctrls; ctrl++) {
+ pp->irq_mask[ctrl] = ~0;
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK +
+ (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
+ pp->irq_mask[ctrl]);
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_ENABLE +
+ (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
+ ~0);
+ }
}
/* Setup RC BARs */
@@ -697,12 +560,10 @@
dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0x00000000);
/* Setup interrupt pins */
- dw_pcie_dbi_ro_wr_en(pci);
val = dw_pcie_readl_dbi(pci, PCI_INTERRUPT_LINE);
val &= 0xffff00ff;
val |= 0x00000100;
dw_pcie_writel_dbi(pci, PCI_INTERRUPT_LINE, val);
- dw_pcie_dbi_ro_wr_dis(pci);
/* Setup bus numbers */
val = dw_pcie_readl_dbi(pci, PCI_PRIMARY_BUS);
@@ -718,54 +579,51 @@
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) {
- /* Get iATU unroll support */
- pci->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pci);
- dev_dbg(pci->dev, "iATU unroll: %s\n",
- pci->iatu_unroll_enabled ? "enabled" : "disabled");
- }
+ if (pp->bridge->child_ops == &dw_child_pcie_ops) {
+ int atu_idx = 0;
+ struct resource_entry *entry;
- /* Get last memory resource entry */
- resource_list_for_each_entry_safe(entry, tmp, &pp->bridge->windows) {
- if (resource_type(entry->res) != IORESOURCE_MEM)
- continue;
+ /* Get last memory resource entry */
+ resource_list_for_each_entry(entry, &pp->bridge->windows) {
+ if (resource_type(entry->res) != IORESOURCE_MEM)
+ continue;
- if (pci->num_viewport <= ++atu_idx)
- break;
+ if (pci->num_viewport <= ++atu_idx)
+ break;
- dw_pcie_prog_outbound_atu(pci, atu_idx,
- PCIE_ATU_TYPE_MEM, entry->res->start,
- entry->res->start - entry->offset,
- resource_size(entry->res));
- }
-
- if (pp->io_size) {
- if (pci->num_viewport > ++atu_idx)
dw_pcie_prog_outbound_atu(pci, atu_idx,
- PCIE_ATU_TYPE_IO, pp->io_base,
- pp->io_bus_addr, pp->io_size);
- else
- pci->io_cfg_atu_shared = true;
+ PCIE_ATU_TYPE_MEM, entry->res->start,
+ entry->res->start - entry->offset,
+ resource_size(entry->res));
+ }
+
+ if (pp->io_size) {
+ if (pci->num_viewport > ++atu_idx)
+ dw_pcie_prog_outbound_atu(pci, atu_idx,
+ PCIE_ATU_TYPE_IO, pp->io_base,
+ pp->io_bus_addr, pp->io_size);
+ else
+ pci->iatu_unroll_enabled |= DWC_IATU_IOCFG_SHARED;
+ }
+
+ if (pci->num_viewport <= atu_idx)
+ dev_warn(pci->dev, "Resources exceed number of ATU entries (%d)",
+ pci->num_viewport);
}
- if (pci->num_viewport <= atu_idx)
- dev_warn(pci->dev, "Resources exceed number of ATU entries (%d)",
- pci->num_viewport);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0);
- dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
-
- /* Enable write permission for the DBI read-only register */
- dw_pcie_dbi_ro_wr_en(pci);
/* Program correct class for RC */
- dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);
- /* Better disable write permission right after the update */
- dw_pcie_dbi_ro_wr_dis(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);
}
+EXPORT_SYMBOL_GPL(dw_pcie_setup_rc);
--
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