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-rw-r--r--arch/arm/mach-tegra/pcie.c12
-rw-r--r--arch/frv/mb93090-mb00/pci-vdk.c4
-rw-r--r--arch/mips/pci/pci-octeon.c15
-rw-r--r--arch/powerpc/include/asm/machdep.h3
-rw-r--r--arch/powerpc/kernel/pci-common.c20
-rw-r--r--arch/powerpc/platforms/powernv/pci-ioda.c41
-rw-r--r--arch/tile/kernel/pci.c26
7 files changed, 76 insertions, 45 deletions
diff --git a/arch/arm/mach-tegra/pcie.c b/arch/arm/mach-tegra/pcie.c
index d3ad5150d660..c25a2a4f2e3d 100644
--- a/arch/arm/mach-tegra/pcie.c
+++ b/arch/arm/mach-tegra/pcie.c
@@ -367,17 +367,7 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0bf1, tegra_pcie_fixup_class);
/* Tegra PCIE requires relaxed ordering */
static void __devinit tegra_pcie_relax_enable(struct pci_dev *dev)
{
- u16 val16;
- int pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
-
- if (pos <= 0) {
- dev_err(&dev->dev, "skipping relaxed ordering fixup\n");
- return;
- }
-
- pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &val16);
- val16 |= PCI_EXP_DEVCTL_RELAX_EN;
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, val16);
+ pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_RELAX_EN);
}
DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, tegra_pcie_relax_enable);
diff --git a/arch/frv/mb93090-mb00/pci-vdk.c b/arch/frv/mb93090-mb00/pci-vdk.c
index d04ed14bbf0c..71e9bcf58105 100644
--- a/arch/frv/mb93090-mb00/pci-vdk.c
+++ b/arch/frv/mb93090-mb00/pci-vdk.c
@@ -330,10 +330,8 @@ void __init pcibios_fixup_bus(struct pci_bus *bus)
pci_read_bridge_bases(bus);
if (bus->number == 0) {
- struct list_head *ln;
struct pci_dev *dev;
- for (ln=bus->devices.next; ln != &bus->devices; ln=ln->next) {
- dev = pci_dev_b(ln);
+ list_for_each_entry(dev, &bus->devices, bus_list) {
if (dev->devfn == 0) {
dev->resource[0].start = 0;
dev->resource[0].end = 0;
diff --git a/arch/mips/pci/pci-octeon.c b/arch/mips/pci/pci-octeon.c
index 52a1ba70b3b6..c5dfb2c87d44 100644
--- a/arch/mips/pci/pci-octeon.c
+++ b/arch/mips/pci/pci-octeon.c
@@ -117,16 +117,11 @@ int pcibios_plat_dev_init(struct pci_dev *dev)
}
/* Enable the PCIe normal error reporting */
- pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
- if (pos) {
- /* Update Device Control */
- pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &config);
- config |= PCI_EXP_DEVCTL_CERE; /* Correctable Error Reporting */
- config |= PCI_EXP_DEVCTL_NFERE; /* Non-Fatal Error Reporting */
- config |= PCI_EXP_DEVCTL_FERE; /* Fatal Error Reporting */
- config |= PCI_EXP_DEVCTL_URRE; /* Unsupported Request */
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, config);
- }
+ config = PCI_EXP_DEVCTL_CERE; /* Correctable Error Reporting */
+ config |= PCI_EXP_DEVCTL_NFERE; /* Non-Fatal Error Reporting */
+ config |= PCI_EXP_DEVCTL_FERE; /* Fatal Error Reporting */
+ config |= PCI_EXP_DEVCTL_URRE; /* Unsupported Request */
+ pcie_capability_set_word(dev, PCI_EXP_DEVCTL, config);
/* Find the Advanced Error Reporting capability */
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index 42ce570812c1..f7706d722b39 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -214,6 +214,9 @@ struct machdep_calls {
/* Called after scan and before resource survey */
void (*pcibios_fixup_phb)(struct pci_controller *hose);
+ /* Called during PCI resource reassignment */
+ resource_size_t (*pcibios_window_alignment)(struct pci_bus *, unsigned long type);
+
/* Called to shutdown machine specific hardware not already controlled
* by other drivers.
*/
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 2aa04f29e1de..43fea543d686 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -99,6 +99,26 @@ void pcibios_free_controller(struct pci_controller *phb)
kfree(phb);
}
+/*
+ * The function is used to return the minimal alignment
+ * for memory or I/O windows of the associated P2P bridge.
+ * By default, 4KiB alignment for I/O windows and 1MiB for
+ * memory windows.
+ */
+resource_size_t pcibios_window_alignment(struct pci_bus *bus,
+ unsigned long type)
+{
+ if (ppc_md.pcibios_window_alignment)
+ return ppc_md.pcibios_window_alignment(bus, type);
+
+ /*
+ * PCI core will figure out the default
+ * alignment: 4KiB for I/O and 1MiB for
+ * memory window.
+ */
+ return 1;
+}
+
static resource_size_t pcibios_io_size(const struct pci_controller *hose)
{
#ifdef CONFIG_PPC64
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 9cda6a1ad0cf..0e7eccc0f88d 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -855,7 +855,7 @@ static void __devinit pnv_ioda_setup_PEs(struct pci_bus *bus)
if (pe == NULL)
continue;
/* Leaving the PCIe domain ... single PE# */
- if (dev->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE)
+ if (pci_pcie_type(dev) == PCI_EXP_TYPE_PCI_BRIDGE)
pnv_ioda_setup_bus_PE(dev, pe);
else if (dev->subordinate)
pnv_ioda_setup_PEs(dev->subordinate);
@@ -1139,6 +1139,44 @@ static void __devinit pnv_pci_ioda_fixup_phb(struct pci_controller *hose)
}
}
+/*
+ * Returns the alignment for I/O or memory windows for P2P
+ * bridges. That actually depends on how PEs are segmented.
+ * For now, we return I/O or M32 segment size for PE sensitive
+ * P2P bridges. Otherwise, the default values (4KiB for I/O,
+ * 1MiB for memory) will be returned.
+ *
+ * The current PCI bus might be put into one PE, which was
+ * create against the parent PCI bridge. For that case, we
+ * needn't enlarge the alignment so that we can save some
+ * resources.
+ */
+static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus,
+ unsigned long type)
+{
+ struct pci_dev *bridge;
+ struct pci_controller *hose = pci_bus_to_host(bus);
+ struct pnv_phb *phb = hose->private_data;
+ int num_pci_bridges = 0;
+
+ bridge = bus->self;
+ while (bridge) {
+ if (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE) {
+ num_pci_bridges++;
+ if (num_pci_bridges >= 2)
+ return 1;
+ }
+
+ bridge = bridge->bus->self;
+ }
+
+ /* We need support prefetchable memory window later */
+ if (type & IORESOURCE_MEM)
+ return phb->ioda.m32_segsize;
+
+ return phb->ioda.io_segsize;
+}
+
/* Prevent enabling devices for which we couldn't properly
* assign a PE
*/
@@ -1306,6 +1344,7 @@ void __init pnv_pci_init_ioda1_phb(struct device_node *np)
*/
ppc_md.pcibios_fixup_phb = pnv_pci_ioda_fixup_phb;
ppc_md.pcibios_enable_device_hook = pnv_pci_enable_device_hook;
+ ppc_md.pcibios_window_alignment = pnv_pci_window_alignment;
pci_add_flags(PCI_PROBE_ONLY | PCI_REASSIGN_ALL_RSRC);
/* Reset IODA tables to a clean state */
diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c
index 33c10864d2f7..d2292be6fb90 100644
--- a/arch/tile/kernel/pci.c
+++ b/arch/tile/kernel/pci.c
@@ -246,16 +246,13 @@ static void __devinit fixup_read_and_payload_sizes(void)
/* Scan for the smallest maximum payload size. */
while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
- int pcie_caps_offset;
u32 devcap;
int max_payload;
- pcie_caps_offset = pci_find_capability(dev, PCI_CAP_ID_EXP);
- if (pcie_caps_offset == 0)
+ if (!pci_is_pcie(dev))
continue;
- pci_read_config_dword(dev, pcie_caps_offset + PCI_EXP_DEVCAP,
- &devcap);
+ pcie_capability_read_dword(dev, PCI_EXP_DEVCAP, &devcap);
max_payload = devcap & PCI_EXP_DEVCAP_PAYLOAD;
if (max_payload < smallest_max_payload)
smallest_max_payload = max_payload;
@@ -263,21 +260,10 @@ static void __devinit fixup_read_and_payload_sizes(void)
/* Now, set the max_payload_size for all devices to that value. */
new_values = (max_read_size << 12) | (smallest_max_payload << 5);
- while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
- int pcie_caps_offset;
- u16 devctl;
-
- pcie_caps_offset = pci_find_capability(dev, PCI_CAP_ID_EXP);
- if (pcie_caps_offset == 0)
- continue;
-
- pci_read_config_word(dev, pcie_caps_offset + PCI_EXP_DEVCTL,
- &devctl);
- devctl &= ~(PCI_EXP_DEVCTL_PAYLOAD | PCI_EXP_DEVCTL_READRQ);
- devctl |= new_values;
- pci_write_config_word(dev, pcie_caps_offset + PCI_EXP_DEVCTL,
- devctl);
- }
+ while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL)
+ pcie_capability_clear_and_set_word(dev, PCI_EXP_DEVCTL,
+ PCI_EXP_DEVCTL_PAYLOAD | PCI_EXP_DEVCTL_READRQ,
+ new_values);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-30 15:10:06 +0000