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| author | Lijo Lazar <lijo.lazar@amd.com> | 2024-05-09 17:02:33 +0530 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2024-05-17 17:40:36 -0400 |
| commit | b194d21b9bcc15b50df1bc3ff7428e51c2918a6f (patch) | |
| tree | 0ce858ab13c931f6cbdb286e44bbe8a16201f3a9 /drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | |
| parent | 8ce97959ecc23a49c8a24975f5566287e5b15944 (diff) | |
| download | lwn-b194d21b9bcc15b50df1bc3ff7428e51c2918a6f.tar.gz lwn-b194d21b9bcc15b50df1bc3ff7428e51c2918a6f.zip | |
drm/amdgpu: Use NPS ranges from discovery table
Add GMC API to fetch NPS range information from discovery table. Use NPS
range information in GMC 9.4.3 SOCs when available, otherwise fallback
to software method.
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Le Ma <le.ma@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c index 824dd5b57d0d..7446b351895f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c @@ -367,6 +367,35 @@ static void amdgpu_discovery_harvest_config_quirk(struct amdgpu_device *adev) } } +static int amdgpu_discovery_verify_npsinfo(struct amdgpu_device *adev, + struct binary_header *bhdr) +{ + struct table_info *info; + uint16_t checksum; + uint16_t offset; + + info = &bhdr->table_list[NPS_INFO]; + offset = le16_to_cpu(info->offset); + checksum = le16_to_cpu(info->checksum); + + struct nps_info_header *nhdr = + (struct nps_info_header *)(adev->mman.discovery_bin + offset); + + if (le32_to_cpu(nhdr->table_id) != NPS_INFO_TABLE_ID) { + dev_dbg(adev->dev, "invalid ip discovery nps info table id\n"); + return -EINVAL; + } + + if (!amdgpu_discovery_verify_checksum(adev->mman.discovery_bin + offset, + le32_to_cpu(nhdr->size_bytes), + checksum)) { + dev_dbg(adev->dev, "invalid nps info data table checksum\n"); + return -EINVAL; + } + + return 0; +} + static int amdgpu_discovery_init(struct amdgpu_device *adev) { struct table_info *info; @@ -1667,6 +1696,69 @@ static int amdgpu_discovery_get_vcn_info(struct amdgpu_device *adev) return 0; } +union nps_info { + struct nps_info_v1_0 v1; +}; + +int amdgpu_discovery_get_nps_info(struct amdgpu_device *adev, + uint32_t *nps_type, + struct amdgpu_gmc_memrange **ranges, + int *range_cnt) +{ + struct amdgpu_gmc_memrange *mem_ranges; + struct binary_header *bhdr; + union nps_info *nps_info; + u16 offset; + int i; + + if (!nps_type || !range_cnt || !ranges) + return -EINVAL; + + if (!adev->mman.discovery_bin) { + dev_err(adev->dev, + "fetch mem range failed, ip discovery uninitialized\n"); + return -EINVAL; + } + + bhdr = (struct binary_header *)adev->mman.discovery_bin; + offset = le16_to_cpu(bhdr->table_list[NPS_INFO].offset); + + if (!offset) + return -ENOENT; + + /* If verification fails, return as if NPS table doesn't exist */ + if (amdgpu_discovery_verify_npsinfo(adev, bhdr)) + return -ENOENT; + + nps_info = (union nps_info *)(adev->mman.discovery_bin + offset); + + switch (le16_to_cpu(nps_info->v1.header.version_major)) { + case 1: + *nps_type = nps_info->v1.nps_type; + *range_cnt = nps_info->v1.count; + mem_ranges = kvzalloc( + *range_cnt * sizeof(struct amdgpu_gmc_memrange), + GFP_KERNEL); + for (i = 0; i < *range_cnt; i++) { + mem_ranges[i].base_address = + nps_info->v1.instance_info[i].base_address; + mem_ranges[i].limit_address = + nps_info->v1.instance_info[i].limit_address; + mem_ranges[i].nid_mask = -1; + mem_ranges[i].flags = 0; + } + *ranges = mem_ranges; + break; + default: + dev_err(adev->dev, "Unhandled NPS info table %d.%d\n", + le16_to_cpu(nps_info->v1.header.version_major), + le16_to_cpu(nps_info->v1.header.version_minor)); + return -EINVAL; + } + + return 0; +} + static int amdgpu_discovery_set_common_ip_blocks(struct amdgpu_device *adev) { /* what IP to use for this? */ |