In case of Red Hat Generic PCIE Root Port reserve additional buses and/or IO/MEM/PREF space, which values are provided in a vendor-specific capability.
Signed-off-by: Aleksandr Bezzubikov zuban32s@gmail.com Reviewed-by: Marcel Apfelbaum marcel@redhat.com --- src/fw/pciinit.c | 106 ++++++++++++++++++++++++++++++++++++++++++++++++++++--- src/hw/pci_ids.h | 3 ++ 2 files changed, 105 insertions(+), 4 deletions(-)
diff --git a/src/fw/pciinit.c b/src/fw/pciinit.c index 864954f..22a12f8 100644 --- a/src/fw/pciinit.c +++ b/src/fw/pciinit.c @@ -15,6 +15,7 @@ #include "hw/pcidevice.h" // pci_probe_devices #include "hw/pci_ids.h" // PCI_VENDOR_ID_INTEL #include "hw/pci_regs.h" // PCI_COMMAND +#include "fw/dev-pci.h" // REDHAT_CAP_RESOURCE_RESERVE #include "list.h" // struct hlist_node #include "malloc.h" // free #include "output.h" // dprintf @@ -522,6 +523,32 @@ static void pci_bios_init_platform(void) } }
+static u8 pci_find_resource_reserve_capability(u16 bdf) +{ + if (pci_config_readw(bdf, PCI_VENDOR_ID) == PCI_VENDOR_ID_REDHAT && + pci_config_readw(bdf, PCI_DEVICE_ID) == + PCI_DEVICE_ID_REDHAT_ROOT_PORT) { + u8 cap = 0; + do { + cap = pci_find_capability(bdf, PCI_CAP_ID_VNDR, cap); + } while (cap && + pci_config_readb(bdf, cap + PCI_CAP_REDHAT_TYPE_OFFSET) != + REDHAT_CAP_RESOURCE_RESERVE); + if (cap) { + u8 cap_len = pci_config_readb(bdf, cap + PCI_CAP_FLAGS); + if (cap_len < RES_RESERVE_CAP_SIZE) { + dprintf(1, "PCI: QEMU resource reserve cap length %d is invalid\n", + cap_len); + } + } else { + dprintf(1, "PCI: invalid QEMU resource reserve cap offset\n"); + } + return cap; + } else { + dprintf(1, "PCI: QEMU resource reserve cap not found\n"); + return 0; + } +}
/**************************************************************** * Bus initialization @@ -578,9 +605,33 @@ pci_bios_init_bus_rec(int bus, u8 *pci_bus) pci_bios_init_bus_rec(secbus, pci_bus);
if (subbus != *pci_bus) { + u8 res_bus = 0; + u8 cap = pci_find_resource_reserve_capability(bdf); + + if (cap) { + u32 tmp_res_bus = pci_config_readl(bdf, + cap + RES_RESERVE_BUS_RES); + if (tmp_res_bus != (u32)-1) { + res_bus = tmp_res_bus & 0xFF; + if ((u8)(res_bus + secbus) < secbus || + (u8)(res_bus + secbus) < res_bus) { + dprintf(1, "PCI: bus_reserve value %d is invalid\n", + res_bus); + res_bus = 0; + } + } + if (secbus + res_bus > *pci_bus) { + dprintf(1, "PCI: QEMU resource reserve cap: bus = %u\n", + res_bus); + res_bus = secbus + res_bus; + } else { + res_bus = *pci_bus; + } + } dprintf(1, "PCI: subordinate bus = 0x%x -> 0x%x\n", - subbus, *pci_bus); - subbus = *pci_bus; + subbus, res_bus); + subbus = res_bus; + *pci_bus = res_bus; } else { dprintf(1, "PCI: subordinate bus = 0x%x\n", subbus); } @@ -844,20 +895,67 @@ static int pci_bios_check_devices(struct pci_bus *busses) */ parent = &busses[0]; int type; - u8 pcie_cap = pci_find_capability(s->bus_dev->bdf, PCI_CAP_ID_EXP, 0); + u16 bdf = s->bus_dev->bdf; + u8 pcie_cap = pci_find_capability(bdf, PCI_CAP_ID_EXP, 0); + u8 qemu_cap = pci_find_resource_reserve_capability(bdf); + int hotplug_support = pci_bus_hotplug_support(s, pcie_cap); for (type = 0; type < PCI_REGION_TYPE_COUNT; type++) { u64 align = (type == PCI_REGION_TYPE_IO) ? PCI_BRIDGE_IO_MIN : PCI_BRIDGE_MEM_MIN; if (!pci_bridge_has_region(s->bus_dev, type)) continue; + u64 size = 0; + if (qemu_cap) { + u32 tmp_size; + u64 tmp_size_64; + switch(type) { + case PCI_REGION_TYPE_IO: + tmp_size_64 = (pci_config_readl(bdf, qemu_cap + RES_RESERVE_IO) | + (u64)pci_config_readl(bdf, qemu_cap + RES_RESERVE_IO + 4) << 32); + if (tmp_size_64 != (u64)-1) { + size = tmp_size_64; + } + break; + case PCI_REGION_TYPE_MEM: + tmp_size = pci_config_readl(bdf, qemu_cap + RES_RESERVE_MEM); + if (tmp_size != (u32)-1) { + size = tmp_size; + } + break; + case PCI_REGION_TYPE_PREFMEM: + tmp_size = pci_config_readl(bdf, qemu_cap + RES_RESERVE_PREF_MEM_32); + tmp_size_64 = (pci_config_readl(bdf, qemu_cap + RES_RESERVE_PREF_MEM_64) | + (u64)pci_config_readl(bdf, qemu_cap + RES_RESERVE_PREF_MEM_64 + 4) << 32); + if (tmp_size != (u32)-1 && tmp_size_64 == (u64)-1) { + size = tmp_size; + } else if (tmp_size == (u32)-1 && tmp_size_64 != (u64)-1) { + size = tmp_size_64; + } else if (tmp_size != (u32)-1 && tmp_size_64 != (u64)-1) { + dprintf(1, "PCI: resource reserve cap PREF32 and PREF64" + " conflict\n"); + } + break; + default: + break; + } + } if (pci_region_align(&s->r[type]) > align) align = pci_region_align(&s->r[type]); u64 sum = pci_region_sum(&s->r[type]); int resource_optional = pcie_cap && (type == PCI_REGION_TYPE_IO); if (!sum && hotplug_support && !resource_optional) sum = align; /* reserve min size for hot-plug */ - u64 size = ALIGN(sum, align); + if (size > sum) { + dprintf(1, "PCI: QEMU resource reserve cap: " + "size %08llx type %s\n", + size, region_type_name[type]); + if (type != PCI_REGION_TYPE_IO) { + size = ALIGN(size, align); + } + } else { + size = ALIGN(sum, align); + } int is64 = pci_bios_bridge_region_is64(&s->r[type], s->bus_dev, type); // entry->bar is -1 if the entry represents a bridge region diff --git a/src/hw/pci_ids.h b/src/hw/pci_ids.h index 4ac73b4..38fa2ca 100644 --- a/src/hw/pci_ids.h +++ b/src/hw/pci_ids.h @@ -2263,6 +2263,9 @@ #define PCI_DEVICE_ID_KORENIX_JETCARDF0 0x1600 #define PCI_DEVICE_ID_KORENIX_JETCARDF1 0x16ff
+#define PCI_VENDOR_ID_REDHAT 0x1b36 +#define PCI_DEVICE_ID_REDHAT_ROOT_PORT 0x000C + #define PCI_VENDOR_ID_TEKRAM 0x1de1 #define PCI_DEVICE_ID_TEKRAM_DC290 0xdc29