This patch adds the framework for binding to a specific panthor_hw structure based on the architecture major value parsed from the GPU_ID register. This is in preparation of enabling architecture-specific behaviours based on GPU_ID.
This framework allows a single panthor_hw structure to be shared across multiple architectures should there be minimal changes between them via the arch_min and arch_max field of the panthor_hw_entry structure, instead of duplicating the structure across multiple architectures. Signed-off-by: Karunika Choo <[email protected]> --- drivers/gpu/drm/panthor/panthor_device.h | 4 ++ drivers/gpu/drm/panthor/panthor_hw.c | 49 ++++++++++++++++++++++++ drivers/gpu/drm/panthor/panthor_hw.h | 6 +++ 3 files changed, 59 insertions(+) diff --git a/drivers/gpu/drm/panthor/panthor_device.h b/drivers/gpu/drm/panthor/panthor_device.h index a764111359d2..1457c1255f1f 100644 --- a/drivers/gpu/drm/panthor/panthor_device.h +++ b/drivers/gpu/drm/panthor/panthor_device.h @@ -26,6 +26,7 @@ struct panthor_device; struct panthor_gpu; struct panthor_group_pool; struct panthor_heap_pool; +struct panthor_hw; struct panthor_job; struct panthor_mmu; struct panthor_fw; @@ -122,6 +123,9 @@ struct panthor_device { /** @csif_info: Command stream interface information. */ struct drm_panthor_csif_info csif_info; + /** @hw: GPU-specific data. */ + struct panthor_hw *hw; + /** @gpu: GPU management data. */ struct panthor_gpu *gpu; diff --git a/drivers/gpu/drm/panthor/panthor_hw.c b/drivers/gpu/drm/panthor/panthor_hw.c index 326a9db0b5c2..b6e7401327c3 100644 --- a/drivers/gpu/drm/panthor/panthor_hw.c +++ b/drivers/gpu/drm/panthor/panthor_hw.c @@ -8,6 +8,28 @@ #define GPU_PROD_ID_MAKE(arch_major, prod_major) \ (((arch_major) << 24) | (prod_major)) +/** struct panthor_hw_entry - HW arch major to panthor_hw binding entry */ +struct panthor_hw_entry { + /** @arch_min: Minimum supported architecture major value (inclusive) */ + u8 arch_min; + + /** @arch_max: Maximum supported architecture major value (inclusive) */ + u8 arch_max; + + /** @hwdev: Pointer to panthor_hw structure */ + struct panthor_hw *hwdev; +}; + +static struct panthor_hw panthor_hw_arch_v10 = {}; + +static struct panthor_hw_entry panthor_hw_match[] = { + { + .arch_min = 10, + .arch_max = 13, + .hwdev = &panthor_hw_arch_v10, + }, +}; + static char *get_gpu_model_name(struct panthor_device *ptdev) { const u32 gpu_id = ptdev->gpu_info.gpu_id; @@ -116,6 +138,29 @@ static void panthor_hw_info_init(struct panthor_device *ptdev) ptdev->gpu_info.tiler_present); } +static int panthor_hw_bind_device(struct panthor_device *ptdev) +{ + struct panthor_hw *hdev = NULL; + const u32 arch_major = GPU_ARCH_MAJOR(ptdev->gpu_info.gpu_id); + int i = 0; + + for (i = 0; i < ARRAY_SIZE(panthor_hw_match); i++) { + struct panthor_hw_entry *entry = &panthor_hw_match[i]; + + if (arch_major >= entry->arch_min && arch_major <= entry->arch_max) { + hdev = entry->hwdev; + break; + } + } + + if (!hdev) + return -EOPNOTSUPP; + + ptdev->hw = hdev; + + return 0; +} + static int panthor_hw_gpu_id_init(struct panthor_device *ptdev) { ptdev->gpu_info.gpu_id = gpu_read(ptdev, GPU_ID); @@ -133,6 +178,10 @@ int panthor_hw_init(struct panthor_device *ptdev) if (ret) return ret; + ret = panthor_hw_bind_device(ptdev); + if (ret) + return ret; + panthor_hw_info_init(ptdev); return 0; diff --git a/drivers/gpu/drm/panthor/panthor_hw.h b/drivers/gpu/drm/panthor/panthor_hw.h index 0af6acc6aa6a..39752de3e7ad 100644 --- a/drivers/gpu/drm/panthor/panthor_hw.h +++ b/drivers/gpu/drm/panthor/panthor_hw.h @@ -6,6 +6,12 @@ struct panthor_device; +/** + * struct panthor_hw - GPU specific register mapping and functions + */ +struct panthor_hw { +}; + int panthor_hw_init(struct panthor_device *ptdev); #endif /* __PANTHOR_HW_H__ */ -- 2.49.0
