diff options
| author | Tuan Phan <tuanphan@os.amperecomputing.com> | 2020-08-06 14:57:34 -0700 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2020-09-17 12:27:43 -0500 |
| commit | 877c1a5f79c6984bbe3f2924234c08e2f4f1acd5 (patch) | |
| tree | 78661f2d38a78f879a6d1e5f7d1a5122c99daa69 /drivers | |
| parent | 2ce02a864ac1a2bf99baeb20d38100d2cc413ac2 (diff) | |
PCI/ACPI: Add Ampere Altra SOC MCFG quirk
Ampere Altra SOC supports only 32-bit ECAM reads. Add an MCFG quirk for
the platform.
Link: https://lore.kernel.org/r/1596751055-12316-1-git-send-email-tuanphan@os.amperecomputing.com
Signed-off-by: Tuan Phan <tuanphan@os.amperecomputing.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/pci_mcfg.c | 20 | ||||
| -rw-r--r-- | drivers/pci/ecam.c | 10 |
2 files changed, 30 insertions, 0 deletions
diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c index c8ef3bb5aa00..7ddd57abadd1 100644 --- a/drivers/acpi/pci_mcfg.c +++ b/drivers/acpi/pci_mcfg.c @@ -142,6 +142,26 @@ static struct mcfg_fixup mcfg_quirks[] = { XGENE_V2_ECAM_MCFG(4, 0), XGENE_V2_ECAM_MCFG(4, 1), XGENE_V2_ECAM_MCFG(4, 2), + +#define ALTRA_ECAM_QUIRK(rev, seg) \ + { "Ampere", "Altra ", rev, seg, MCFG_BUS_ANY, &pci_32b_read_ops } + + ALTRA_ECAM_QUIRK(1, 0), + ALTRA_ECAM_QUIRK(1, 1), + ALTRA_ECAM_QUIRK(1, 2), + ALTRA_ECAM_QUIRK(1, 3), + ALTRA_ECAM_QUIRK(1, 4), + ALTRA_ECAM_QUIRK(1, 5), + ALTRA_ECAM_QUIRK(1, 6), + ALTRA_ECAM_QUIRK(1, 7), + ALTRA_ECAM_QUIRK(1, 8), + ALTRA_ECAM_QUIRK(1, 9), + ALTRA_ECAM_QUIRK(1, 10), + ALTRA_ECAM_QUIRK(1, 11), + ALTRA_ECAM_QUIRK(1, 12), + ALTRA_ECAM_QUIRK(1, 13), + ALTRA_ECAM_QUIRK(1, 14), + ALTRA_ECAM_QUIRK(1, 15), }; static char mcfg_oem_id[ACPI_OEM_ID_SIZE]; diff --git a/drivers/pci/ecam.c b/drivers/pci/ecam.c index 8f065a42fc1a..b54d32a31669 100644 --- a/drivers/pci/ecam.c +++ b/drivers/pci/ecam.c @@ -168,4 +168,14 @@ const struct pci_ecam_ops pci_32b_ops = { .write = pci_generic_config_write32, } }; + +/* ECAM ops for 32-bit read only (non-compliant) */ +const struct pci_ecam_ops pci_32b_read_ops = { + .bus_shift = 20, + .pci_ops = { + .map_bus = pci_ecam_map_bus, + .read = pci_generic_config_read32, + .write = pci_generic_config_write, + } +}; #endif |