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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-07 16:34:40 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-07 16:34:40 (GMT) |
commit | c818c778b0384e5d9e8184ec43b73e05a7ced86f (patch) | |
tree | 2d50257ac6f94448f1dfe2bb65b4ff5aa383fe4a /arch/powerpc/platforms/pseries | |
parent | c8de2fa4dc2778ae3605925c127b3deac54b2b3a (diff) | |
parent | 5737789c8340620d7b542d1d4e9b197de8eb2801 (diff) | |
download | linux-fsl-qoriq-c818c778b0384e5d9e8184ec43b73e05a7ced86f.tar.xz |
Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc updates from Benjamin Herrenschmidt:
"Here are a few more powerpc bits that I would like in 3.10.
Mostly remaining bolts & screw tightening of power8 support such as
actually exposing the new features via the previously added AT_HWCAP2,
and a few fixes, some of them for problems exposed recently like
irqdomain warnings or sysfs access permission issues, some exposed by
power8 hardware.
The only change outside of arch/powerpc is a small one to irqdomain.c
to allow silent failure to fix a problem on Cell where we get a dozen
WARN_ON's tripping at boot for what is basically a normal case."
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: Make hard_irq_disable() do the right thing vs. irq tracing
powerpc/topology: Fix spurr attribute permission
powerpc/pci: Support per-aperture memory offset
powerpc/cell/iommu: Improve error message for missing node
powerpc/cell/spufs: Fix status attribute permission
irqdomain: Allow quiet failure mode
powerpc/pnv: Fix "compatible" property for P8 PHB
powerpc/pci: Don't add bogus empty resources to PHBs
powerpc/powerpnv: Properly handle failure starting CPUs
powerpc/cputable: Advertise support for ISEL/HTM/DSCR/TAR on POWER8
powerpc/cputable: Advertise ISEL support on appropriate embedded processors
powerpc/cputable: Advertise DSCR support on P7/P7+
powerpc/cputable: Reserve bits in HWCAP2 for new features
powerpc/pseries: Perform proper max_bus_speed detection
powerpc/pseries: Force 32 bit MSIs for devices that require it
powerpc/tm: Fix null pointer deference in flush_hash_page
powerpc/powernv: Defer OPAL exception handler registration
powerpc: Emulate non privileged DSCR read and write
Diffstat (limited to 'arch/powerpc/platforms/pseries')
-rw-r--r-- | arch/powerpc/platforms/pseries/msi.c | 21 | ||||
-rw-r--r-- | arch/powerpc/platforms/pseries/pci.c | 53 | ||||
-rw-r--r-- | arch/powerpc/platforms/pseries/pseries.h | 4 | ||||
-rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 2 |
4 files changed, 77 insertions, 3 deletions
diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c index e5b0847..420524e 100644 --- a/arch/powerpc/platforms/pseries/msi.c +++ b/arch/powerpc/platforms/pseries/msi.c @@ -24,6 +24,7 @@ static int query_token, change_token; #define RTAS_RESET_FN 2 #define RTAS_CHANGE_MSI_FN 3 #define RTAS_CHANGE_MSIX_FN 4 +#define RTAS_CHANGE_32MSI_FN 5 static struct pci_dn *get_pdn(struct pci_dev *pdev) { @@ -58,7 +59,8 @@ static int rtas_change_msi(struct pci_dn *pdn, u32 func, u32 num_irqs) seq_num = 1; do { - if (func == RTAS_CHANGE_MSI_FN || func == RTAS_CHANGE_MSIX_FN) + if (func == RTAS_CHANGE_MSI_FN || func == RTAS_CHANGE_MSIX_FN || + func == RTAS_CHANGE_32MSI_FN) rc = rtas_call(change_token, 6, 4, rtas_ret, addr, BUID_HI(buid), BUID_LO(buid), func, num_irqs, seq_num); @@ -426,9 +428,12 @@ static int rtas_setup_msi_irqs(struct pci_dev *pdev, int nvec_in, int type) */ again: if (type == PCI_CAP_ID_MSI) { - rc = rtas_change_msi(pdn, RTAS_CHANGE_MSI_FN, nvec); + if (pdn->force_32bit_msi) + rc = rtas_change_msi(pdn, RTAS_CHANGE_32MSI_FN, nvec); + else + rc = rtas_change_msi(pdn, RTAS_CHANGE_MSI_FN, nvec); - if (rc < 0) { + if (rc < 0 && !pdn->force_32bit_msi) { pr_debug("rtas_msi: trying the old firmware call.\n"); rc = rtas_change_msi(pdn, RTAS_CHANGE_FN, nvec); } @@ -512,3 +517,13 @@ static int rtas_msi_init(void) return 0; } arch_initcall(rtas_msi_init); + +static void quirk_radeon(struct pci_dev *dev) +{ + struct pci_dn *pdn = get_pdn(dev); + + if (pdn) + pdn->force_32bit_msi = 1; +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x68f2, quirk_radeon); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0xaa68, quirk_radeon); diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c index 0b580f4..5f93856 100644 --- a/arch/powerpc/platforms/pseries/pci.c +++ b/arch/powerpc/platforms/pseries/pci.c @@ -108,3 +108,56 @@ static void fixup_winbond_82c105(struct pci_dev* dev) } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105, fixup_winbond_82c105); + +int pseries_root_bridge_prepare(struct pci_host_bridge *bridge) +{ + struct device_node *dn, *pdn; + struct pci_bus *bus; + const uint32_t *pcie_link_speed_stats; + + bus = bridge->bus; + + dn = pcibios_get_phb_of_node(bus); + if (!dn) + return 0; + + for (pdn = dn; pdn != NULL; pdn = of_get_next_parent(pdn)) { + pcie_link_speed_stats = (const uint32_t *) of_get_property(pdn, + "ibm,pcie-link-speed-stats", NULL); + if (pcie_link_speed_stats) + break; + } + + of_node_put(pdn); + + if (!pcie_link_speed_stats) { + pr_err("no ibm,pcie-link-speed-stats property\n"); + return 0; + } + + switch (pcie_link_speed_stats[0]) { + case 0x01: + bus->max_bus_speed = PCIE_SPEED_2_5GT; + break; + case 0x02: + bus->max_bus_speed = PCIE_SPEED_5_0GT; + break; + default: + bus->max_bus_speed = PCI_SPEED_UNKNOWN; + break; + } + + switch (pcie_link_speed_stats[1]) { + case 0x01: + bus->cur_bus_speed = PCIE_SPEED_2_5GT; + break; + case 0x02: + bus->cur_bus_speed = PCIE_SPEED_5_0GT; + break; + default: + bus->cur_bus_speed = PCI_SPEED_UNKNOWN; + break; + } + + return 0; +} diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h index 8af71e4..c2a3a25 100644 --- a/arch/powerpc/platforms/pseries/pseries.h +++ b/arch/powerpc/platforms/pseries/pseries.h @@ -63,4 +63,8 @@ extern int dlpar_detach_node(struct device_node *); /* Snooze Delay, pseries_idle */ DECLARE_PER_CPU(long, smt_snooze_delay); +/* PCI root bridge prepare function override for pseries */ +struct pci_host_bridge; +int pseries_root_bridge_prepare(struct pci_host_bridge *bridge); + #endif /* _PSERIES_PSERIES_H */ diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index ac932a9..c11c823 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -466,6 +466,8 @@ static void __init pSeries_setup_arch(void) else ppc_md.enable_pmcs = power4_enable_pmcs; + ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare; + if (firmware_has_feature(FW_FEATURE_SET_MODE)) { long rc; if ((rc = pSeries_enable_reloc_on_exc()) != H_SUCCESS) { |