PPTables could be embedded in firmware binaries with v2.0 or v2.1 format. Add a common helper to get pptable from firmware binaries.
Signed-off-by: Lijo Lazar <[email protected]> Assisted-by: Claude Sonnet (Cursor AI) --- drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c | 140 +++++++++++++++++++++++++ drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h | 3 + 2 files changed, 143 insertions(+) diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c index 0a745afa8552..ad1020b8389c 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c @@ -1551,3 +1551,143 @@ int smu_cmn_dpm_pcie_width_idx(int width) return ret; } + +static int smu_cmn_get_pptable_v2_0(struct smu_context *smu, void **table, uint32_t *size) +{ + const struct smc_firmware_header_v2_0 *v2; + struct amdgpu_device *adev = smu->adev; + size_t fw_size = adev->pm.fw->size; + uint32_t ppt_offset_bytes; + uint32_t ppt_size_bytes; + + if (fw_size < sizeof(*v2)) { + dev_err(adev->dev, + "SMC firmware too small for v2.0 header: %zu < %zu\n", + fw_size, sizeof(*v2)); + return -EINVAL; + } + + v2 = (const struct smc_firmware_header_v2_0 *)adev->pm.fw->data; + + ppt_offset_bytes = le32_to_cpu(v2->ppt_offset_bytes); + ppt_size_bytes = le32_to_cpu(v2->ppt_size_bytes); + + if (ppt_offset_bytes > fw_size || + ppt_size_bytes > fw_size - ppt_offset_bytes) { + dev_err(adev->dev, + "pptable v2.0 exceeds firmware binary: offset %u + size %u > %zu\n", + ppt_offset_bytes, ppt_size_bytes, fw_size); + return -EINVAL; + } + + *size = ppt_size_bytes; + *table = (uint8_t *)v2 + ppt_offset_bytes; + + return 0; +} + +static int smu_cmn_get_pptable_v2_1(struct smu_context *smu, void **table, + uint32_t *size, uint32_t pptable_id) +{ + const struct smc_firmware_header_v2_1 *v2_1; + struct amdgpu_device *adev = smu->adev; + struct smc_soft_pptable_entry *entries; + size_t fw_size = adev->pm.fw->size; + uint32_t pptable_entry_offset; + uint32_t ppt_offset_bytes; + uint32_t ppt_size_bytes; + uint32_t pptable_count; + int i; + + if (fw_size < sizeof(*v2_1)) { + dev_err(adev->dev, + "SMC firmware too small for v2.1 header: %zu < %zu\n", + fw_size, sizeof(*v2_1)); + return -EINVAL; + } + + v2_1 = (const struct smc_firmware_header_v2_1 *)adev->pm.fw->data; + + pptable_entry_offset = le32_to_cpu(v2_1->pptable_entry_offset); + pptable_count = le32_to_cpu(v2_1->pptable_count); + + if (pptable_entry_offset > fw_size || + pptable_count > (fw_size - pptable_entry_offset) / sizeof(*entries)) { + dev_err(adev->dev, + "pptable v2.1 entry array exceeds firmware binary: offset %u, count %u\n", + pptable_entry_offset, pptable_count); + return -EINVAL; + } + + entries = (struct smc_soft_pptable_entry *) + ((uint8_t *)v2_1 + pptable_entry_offset); + + for (i = 0; i < pptable_count; i++) { + if (le32_to_cpu(entries[i].id) != pptable_id) + continue; + + ppt_offset_bytes = le32_to_cpu(entries[i].ppt_offset_bytes); + ppt_size_bytes = le32_to_cpu(entries[i].ppt_size_bytes); + + if (ppt_offset_bytes > fw_size || + ppt_size_bytes > fw_size - ppt_offset_bytes) { + dev_err(adev->dev, + "pptable entry %d exceeds firmware binary: offset %u + size %u > %zu\n", + i, ppt_offset_bytes, ppt_size_bytes, fw_size); + return -EINVAL; + } + + *table = (uint8_t *)v2_1 + ppt_offset_bytes; + *size = ppt_size_bytes; + return 0; + } + + return -EINVAL; +} + +/** + * smu_cmn_get_pptable_from_firmware - locate the soft pptable embedded in the + * SMC firmware binary. + * @smu: SMU context + * @table: on success, set to the start of the pptable within the firmware + * blob + * @size: on success, set to the pptable size in bytes + * @pptable_id: the entry ID to search for (used only for v2.1 binaries) + * + * Reads the firmware header version and dispatches to the appropriate v2.x + * parser. Only major version 2 is supported; minor version selects between + * the single-entry (v2.0) and multi-entry directory (v2.1) layouts. + * + * Return: 0 on success, -EINVAL for an unsupported version or if the + * requested pptable cannot be found or exceeds the binary bounds. + */ +int smu_cmn_get_pptable_from_firmware(struct smu_context *smu, void **table, + uint32_t *size, uint32_t pptable_id) +{ + const struct smc_firmware_header_v1_0 *hdr; + struct amdgpu_device *adev = smu->adev; + uint16_t version_major, version_minor; + + hdr = (const struct smc_firmware_header_v1_0 *)adev->pm.fw->data; + if (!hdr) + return -EINVAL; + + dev_info(adev->dev, "use driver provided pptable %d\n", pptable_id); + + version_major = le16_to_cpu(hdr->header.header_version_major); + version_minor = le16_to_cpu(hdr->header.header_version_minor); + if (version_major != 2) { + dev_err(adev->dev, "Unsupported smu firmware version %d.%d\n", + version_major, version_minor); + return -EINVAL; + } + + switch (version_minor) { + case 0: + return smu_cmn_get_pptable_v2_0(smu, table, size); + case 1: + return smu_cmn_get_pptable_v2_1(smu, table, size, pptable_id); + default: + return -EINVAL; + } +} diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h index 5b7f64b94179..ae6742f5298f 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h +++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h @@ -249,6 +249,9 @@ int smu_cmn_dpm_pcie_gen_idx(int gen); int smu_cmn_dpm_pcie_width_idx(int width); int smu_cmn_check_fw_version(struct smu_context *smu); +int smu_cmn_get_pptable_from_firmware(struct smu_context *smu, void **table, + uint32_t *size, uint32_t pptable_id); + /*SMU gpu metrics */ /* Attribute ID mapping */ -- 2.49.0
