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drm/amdgpu: Introduce SRIOV critical regions v2 during VF init

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1. Introduced amdgpu_virt_init_critical_region during VF init.
     - VFs use init_data_header_offset and init_data_header_size_kb
            transmitted via PF2VF mailbox to fetch the offset of
            critical regions' offsets/sizes in VRAM and save to
            adev->virt.crit_region_offsets and adev->virt.crit_region_sizes_kb.

Signed-off-by: Ellen Pan <yunru.pan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ellen Pan
2025-10-07 11:00:16 -05:00
committed by Alex Deucher
parent 6d2191d226
commit 07009df649
4 changed files with 220 additions and 0 deletions
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174
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
View File

@@ -44,6 +44,18 @@
vf2pf_info->ucode_info[ucode].version = ver; \
} while (0)
#define mmRCC_CONFIG_MEMSIZE 0xde3
const char *amdgpu_virt_dynamic_crit_table_name[] = {
"IP DISCOVERY",
"VBIOS IMG",
"RAS TELEMETRY",
"DATA EXCHANGE",
"BAD PAGE INFO",
"INIT HEADER",
"LAST",
};
bool amdgpu_virt_mmio_blocked(struct amdgpu_device *adev)
{
/* By now all MMIO pages except mailbox are blocked */
@@ -843,6 +855,168 @@ static void amdgpu_virt_init_ras(struct amdgpu_device *adev)
adev->virt.ras.cper_rptr = 0;
}
static uint8_t amdgpu_virt_crit_region_calc_checksum(uint8_t *buf_start, uint8_t *buf_end)
{
uint32_t sum = 0;
if (buf_start >= buf_end)
return 0;
for (; buf_start < buf_end; buf_start++)
sum += buf_start[0];
return 0xffffffff - sum;
}
int amdgpu_virt_init_critical_region(struct amdgpu_device *adev)
{
struct amd_sriov_msg_init_data_header *init_data_hdr = NULL;
uint32_t init_hdr_offset = adev->virt.init_data_header.offset;
uint32_t init_hdr_size = adev->virt.init_data_header.size_kb << 10;
uint64_t vram_size;
int r = 0;
uint8_t checksum = 0;
/* Skip below init if critical region version != v2 */
if (adev->virt.req_init_data_ver != GPU_CRIT_REGION_V2)
return 0;
if (init_hdr_offset < 0) {
dev_err(adev->dev, "Invalid init header offset\n");
return -EINVAL;
}
vram_size = RREG32(mmRCC_CONFIG_MEMSIZE);
if (!vram_size || vram_size == U32_MAX)
return -EINVAL;
vram_size <<= 20;
if ((init_hdr_offset + init_hdr_size) > vram_size) {
dev_err(adev->dev, "init_data_header exceeds VRAM size, exiting\n");
return -EINVAL;
}
/* Allocate for init_data_hdr */
init_data_hdr = kzalloc(sizeof(struct amd_sriov_msg_init_data_header), GFP_KERNEL);
if (!init_data_hdr)
return -ENOMEM;
amdgpu_device_vram_access(adev, (uint64_t)init_hdr_offset, (uint32_t *)init_data_hdr,
sizeof(struct amd_sriov_msg_init_data_header), false);
/* Table validation */
if (strncmp(init_data_hdr->signature,
AMDGPU_SRIOV_CRIT_DATA_SIGNATURE,
AMDGPU_SRIOV_CRIT_DATA_SIG_LEN) != 0) {
dev_err(adev->dev, "Invalid init data signature: %.4s\n",
init_data_hdr->signature);
r = -EINVAL;
goto out;
}
checksum = amdgpu_virt_crit_region_calc_checksum(
(uint8_t *)&init_data_hdr->initdata_offset,
(uint8_t *)init_data_hdr +
sizeof(struct amd_sriov_msg_init_data_header));
if (checksum != init_data_hdr->checksum) {
dev_err(adev->dev, "Found unmatching checksum from calculation 0x%x and init_data 0x%x\n",
checksum, init_data_hdr->checksum);
r = -EINVAL;
goto out;
}
memset(&adev->virt.crit_regn, 0, sizeof(adev->virt.crit_regn));
memset(adev->virt.crit_regn_tbl, 0, sizeof(adev->virt.crit_regn_tbl));
adev->virt.crit_regn.offset = init_data_hdr->initdata_offset;
adev->virt.crit_regn.size_kb = init_data_hdr->initdata_size_in_kb;
/* Validation and initialization for each table entry */
if (IS_SRIOV_CRIT_REGN_ENTRY_VALID(init_data_hdr, AMD_SRIOV_MSG_IPD_TABLE_ID)) {
if (!init_data_hdr->ip_discovery_size_in_kb ||
init_data_hdr->ip_discovery_size_in_kb > DISCOVERY_TMR_SIZE) {
dev_err(adev->dev, "Invalid %s size: 0x%x\n",
amdgpu_virt_dynamic_crit_table_name[AMD_SRIOV_MSG_IPD_TABLE_ID],
init_data_hdr->ip_discovery_size_in_kb);
r = -EINVAL;
goto out;
}
adev->virt.crit_regn_tbl[AMD_SRIOV_MSG_IPD_TABLE_ID].offset =
init_data_hdr->ip_discovery_offset;
adev->virt.crit_regn_tbl[AMD_SRIOV_MSG_IPD_TABLE_ID].size_kb =
init_data_hdr->ip_discovery_size_in_kb;
}
if (IS_SRIOV_CRIT_REGN_ENTRY_VALID(init_data_hdr, AMD_SRIOV_MSG_VBIOS_IMG_TABLE_ID)) {
if (!init_data_hdr->vbios_img_size_in_kb) {
dev_err(adev->dev, "Invalid %s size: 0x%x\n",
amdgpu_virt_dynamic_crit_table_name[AMD_SRIOV_MSG_VBIOS_IMG_TABLE_ID],
init_data_hdr->vbios_img_size_in_kb);
r = -EINVAL;
goto out;
}
adev->virt.crit_regn_tbl[AMD_SRIOV_MSG_VBIOS_IMG_TABLE_ID].offset =
init_data_hdr->vbios_img_offset;
adev->virt.crit_regn_tbl[AMD_SRIOV_MSG_VBIOS_IMG_TABLE_ID].size_kb =
init_data_hdr->vbios_img_size_in_kb;
}
if (IS_SRIOV_CRIT_REGN_ENTRY_VALID(init_data_hdr, AMD_SRIOV_MSG_RAS_TELEMETRY_TABLE_ID)) {
if (!init_data_hdr->ras_tele_info_size_in_kb) {
dev_err(adev->dev, "Invalid %s size: 0x%x\n",
amdgpu_virt_dynamic_crit_table_name[AMD_SRIOV_MSG_RAS_TELEMETRY_TABLE_ID],
init_data_hdr->ras_tele_info_size_in_kb);
r = -EINVAL;
goto out;
}
adev->virt.crit_regn_tbl[AMD_SRIOV_MSG_RAS_TELEMETRY_TABLE_ID].offset =
init_data_hdr->ras_tele_info_offset;
adev->virt.crit_regn_tbl[AMD_SRIOV_MSG_RAS_TELEMETRY_TABLE_ID].size_kb =
init_data_hdr->ras_tele_info_size_in_kb;
}
if (IS_SRIOV_CRIT_REGN_ENTRY_VALID(init_data_hdr, AMD_SRIOV_MSG_DATAEXCHANGE_TABLE_ID)) {
if (!init_data_hdr->dataexchange_size_in_kb) {
dev_err(adev->dev, "Invalid %s size: 0x%x\n",
amdgpu_virt_dynamic_crit_table_name[AMD_SRIOV_MSG_DATAEXCHANGE_TABLE_ID],
init_data_hdr->dataexchange_size_in_kb);
r = -EINVAL;
goto out;
}
adev->virt.crit_regn_tbl[AMD_SRIOV_MSG_DATAEXCHANGE_TABLE_ID].offset =
init_data_hdr->dataexchange_offset;
adev->virt.crit_regn_tbl[AMD_SRIOV_MSG_DATAEXCHANGE_TABLE_ID].size_kb =
init_data_hdr->dataexchange_size_in_kb;
}
if (IS_SRIOV_CRIT_REGN_ENTRY_VALID(init_data_hdr, AMD_SRIOV_MSG_BAD_PAGE_INFO_TABLE_ID)) {
if (!init_data_hdr->bad_page_size_in_kb) {
dev_err(adev->dev, "Invalid %s size: 0x%x\n",
amdgpu_virt_dynamic_crit_table_name[AMD_SRIOV_MSG_BAD_PAGE_INFO_TABLE_ID],
init_data_hdr->bad_page_size_in_kb);
r = -EINVAL;
goto out;
}
adev->virt.crit_regn_tbl[AMD_SRIOV_MSG_BAD_PAGE_INFO_TABLE_ID].offset =
init_data_hdr->bad_page_info_offset;
adev->virt.crit_regn_tbl[AMD_SRIOV_MSG_BAD_PAGE_INFO_TABLE_ID].size_kb =
init_data_hdr->bad_page_size_in_kb;
}
adev->virt.is_dynamic_crit_regn_enabled = true;
out:
kfree(init_data_hdr);
init_data_hdr = NULL;
return r;
}
void amdgpu_virt_init(struct amdgpu_device *adev)
{
bool is_sriov = false;