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authorTomasz Nowicki <tn@semihalf.com>2016-12-01 09:07:56 +0300
committerBjorn Helgaas <helgaas@kernel.org>2016-12-06 22:45:49 +0300
commit44f22bd91e88f9a1203a6e564a237e593f5f2f74 (patch)
treec4c5e1e3305986af0fc32be51e804be5e1f24d00 /drivers/acpi
parent0d414268fb8d0844030f87027e904f69d96706be (diff)
downloadlinux-44f22bd91e88f9a1203a6e564a237e593f5f2f74.tar.xz
PCI: Add MCFG quirks for Cavium ThunderX pass2.x host controller
ThunderX PCIe controller to off-chip devices (so-called PEM) is not fully compliant with ECAM standard. It uses non-standard configuration space accessors (see thunder_pem_ecam_ops) and custom configuration space granulation (see bus_shift = 24). In order to access configuration space and probe PEM as ACPI-based PCI host controller we need to add MCFG quirk infrastructure. This involves: 1. A new thunder_pem_acpi_init() init function to locate PEM-specific register ranges using ACPI. 2. Export PEM thunder_pem_ecam_ops structure so it is visible to MCFG quirk code. 3. New quirk entries for each PEM segment. Each contains platform IDs, mentioned thunder_pem_ecam_ops and CFG resources. Quirk is considered for ThunderX silicon pass2.x only which is identified via MCFG revision 1. ThunderX pass 2.x requires the following accessors: NUMA Node 0 PCI segments 0- 3: pci_generic_ecam_ops (ECAM-compliant) NUMA Node 0 PCI segments 4- 9: thunder_pem_ecam_ops (MCFG quirk) NUMA Node 1 PCI segments 10-13: pci_generic_ecam_ops (ECAM-compliant) NUMA Node 1 PCI segments 14-19: thunder_pem_ecam_ops (MCFG quirk) [bhelgaas: adapt to use acpi_get_rc_resources(), update Makefile/ifdefs so quirk doesn't depend on CONFIG_PCI_HOST_THUNDER_PEM] Signed-off-by: Tomasz Nowicki <tn@semihalf.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/pci_mcfg.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c
index dd162248c3ee..17cbb07ce16c 100644
--- a/drivers/acpi/pci_mcfg.c
+++ b/drivers/acpi/pci_mcfg.c
@@ -74,6 +74,25 @@ static struct mcfg_fixup mcfg_quirks[] = {
HISI_QUAD_DOM("HIP07 ", 4, &hisi_pcie_ops),
HISI_QUAD_DOM("HIP07 ", 8, &hisi_pcie_ops),
HISI_QUAD_DOM("HIP07 ", 12, &hisi_pcie_ops),
+
+#define THUNDER_PEM_RES(addr, node) \
+ DEFINE_RES_MEM((addr) + ((u64) (node) << 44), 0x39 * SZ_16M)
+#define THUNDER_PEM_QUIRK(rev, node) \
+ { "CAVIUM", "THUNDERX", rev, 4 + (10 * (node)), MCFG_BUS_ANY, \
+ &thunder_pem_ecam_ops, THUNDER_PEM_RES(0x88001f000000UL, node) }, \
+ { "CAVIUM", "THUNDERX", rev, 5 + (10 * (node)), MCFG_BUS_ANY, \
+ &thunder_pem_ecam_ops, THUNDER_PEM_RES(0x884057000000UL, node) }, \
+ { "CAVIUM", "THUNDERX", rev, 6 + (10 * (node)), MCFG_BUS_ANY, \
+ &thunder_pem_ecam_ops, THUNDER_PEM_RES(0x88808f000000UL, node) }, \
+ { "CAVIUM", "THUNDERX", rev, 7 + (10 * (node)), MCFG_BUS_ANY, \
+ &thunder_pem_ecam_ops, THUNDER_PEM_RES(0x89001f000000UL, node) }, \
+ { "CAVIUM", "THUNDERX", rev, 8 + (10 * (node)), MCFG_BUS_ANY, \
+ &thunder_pem_ecam_ops, THUNDER_PEM_RES(0x894057000000UL, node) }, \
+ { "CAVIUM", "THUNDERX", rev, 9 + (10 * (node)), MCFG_BUS_ANY, \
+ &thunder_pem_ecam_ops, THUNDER_PEM_RES(0x89808f000000UL, node) }
+ /* SoC pass2.x */
+ THUNDER_PEM_QUIRK(1, 0),
+ THUNDER_PEM_QUIRK(1, 1),
};
static char mcfg_oem_id[ACPI_OEM_ID_SIZE];