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DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Apr 2023 16:26:31.8784 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 39c7475b-b533-4d12-c540-08db3b72ad15 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF000100D3.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB5629 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mukul.joshi@amd.com, Shashank Sharma , arvind.yadav@amd.com, Alex Deucher , contactshashanksharma@gmail.com, Christian Koenig Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" This patch: - creates a doorbell page for graphics driver usages. - adds a few new varlables in adev->doorbell structure to keep track of kernel's doorbell-bo. - removes the adev->doorbell.ptr variable, replaces it with kernel-doorbell-bo's cpu address. V2: - Create doorbell BO directly, no wrappe functions (Alex) - no additional doorbell structure (Alex, Christian) - Use doorbell_cpu_ptr, remove ioremap (Christian, Alex) - Allocate one extra page of doorbells for MES (Alex) Cc: Alex Deucher Cc: Christian Koenig Signed-off-by: Shashank Sharma --- drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h | 8 ++- .../gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c | 56 ++++++++++++++----- drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h | 3 + drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 7 +++ 4 files changed, 60 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h index 3e77a6b4bd69..fbbff12a14cd 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h @@ -31,10 +31,15 @@ struct amdgpu_doorbell { /* doorbell mmio */ resource_size_t base; resource_size_t size; - u32 __iomem *ptr; /* Number of doorbells reserved for amdgpu kernel driver */ u32 num_kernel_doorbells; + + /* Kernel doorbells */ + struct amdgpu_bo *kernel_doorbells; + + /* For CPU access of doorbells */ + uint32_t *cpu_addr; }; /* Reserved doorbells for amdgpu (including multimedia). @@ -311,6 +316,7 @@ void amdgpu_mm_wdoorbell64(struct amdgpu_device *adev, u32 index, u64 v); */ int amdgpu_doorbell_init(struct amdgpu_device *adev); void amdgpu_doorbell_fini(struct amdgpu_device *adev); +int amdgpu_doorbell_create_kernel_doorbells(struct amdgpu_device *adev); #define RDOORBELL32(index) amdgpu_mm_rdoorbell(adev, (index)) #define WDOORBELL32(index, v) amdgpu_mm_wdoorbell(adev, (index), (v)) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c index 4b934aadcce6..8be2dfa8fa74 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c @@ -39,7 +39,7 @@ u32 amdgpu_mm_rdoorbell(struct amdgpu_device *adev, u32 index) return 0; if (index < adev->doorbell.num_kernel_doorbells) - return readl(adev->doorbell.ptr + index); + return readl(adev->doorbell.cpu_addr + index); DRM_ERROR("reading beyond doorbell aperture: 0x%08x!\n", index); return 0; @@ -61,7 +61,7 @@ void amdgpu_mm_wdoorbell(struct amdgpu_device *adev, u32 index, u32 v) return; if (index < adev->doorbell.num_kernel_doorbells) - writel(v, adev->doorbell.ptr + index); + writel(v, adev->doorbell.cpu_addr + index); else DRM_ERROR("writing beyond doorbell aperture: 0x%08x!\n", index); } @@ -81,7 +81,7 @@ u64 amdgpu_mm_rdoorbell64(struct amdgpu_device *adev, u32 index) return 0; if (index < adev->doorbell.num_kernel_doorbells) - return atomic64_read((atomic64_t *)(adev->doorbell.ptr + index)); + return atomic64_read((atomic64_t *)(adev->doorbell.cpu_addr + index)); DRM_ERROR("reading beyond doorbell aperture: 0x%08x!\n", index); return 0; @@ -103,11 +103,47 @@ void amdgpu_mm_wdoorbell64(struct amdgpu_device *adev, u32 index, u64 v) return; if (index < adev->doorbell.num_kernel_doorbells) - atomic64_set((atomic64_t *)(adev->doorbell.ptr + index), v); + atomic64_set((atomic64_t *)(adev->doorbell.cpu_addr + index), v); else DRM_ERROR("writing beyond doorbell aperture: 0x%08x!\n", index); } +/** + * amdgpu_doorbell_create_kernel_doorbells - Create kernel doorbells for graphics + * + * @adev: amdgpu_device pointer + * + * Creates doorbells for graphics driver usages. + * returns 0 on success, error otherwise. + */ +int amdgpu_doorbell_create_kernel_doorbells(struct amdgpu_device *adev) +{ + int r; + int size; + + /* Reserve first num_kernel_doorbells (page-aligned) for kernel ops */ + size = ALIGN(adev->doorbell.num_kernel_doorbells * sizeof(u32), PAGE_SIZE); + + /* Allocate an extra page for MES kernel usages (ring test) */ + adev->mes.db_start_dw_offset = size / sizeof(u32); + size += PAGE_SIZE; + + r = amdgpu_bo_create_kernel(adev, + size, + PAGE_SIZE, + AMDGPU_GEM_DOMAIN_DOORBELL, + &adev->doorbell.kernel_doorbells, + NULL, + (void **)&adev->doorbell.cpu_addr); + if (r) { + DRM_ERROR("Failed to allocate kernel doorbells, err=%d\n", r); + return r; + } + + adev->doorbell.num_kernel_doorbells = size / sizeof(u32); + return 0; +} + /* * GPU doorbell aperture helpers function. */ @@ -127,7 +163,6 @@ int amdgpu_doorbell_init(struct amdgpu_device *adev) adev->doorbell.base = 0; adev->doorbell.size = 0; adev->doorbell.num_kernel_doorbells = 0; - adev->doorbell.ptr = NULL; return 0; } @@ -156,12 +191,6 @@ int amdgpu_doorbell_init(struct amdgpu_device *adev) if (adev->asic_type >= CHIP_VEGA10) adev->doorbell.num_kernel_doorbells += 0x400; - adev->doorbell.ptr = ioremap(adev->doorbell.base, - adev->doorbell.num_kernel_doorbells * - sizeof(u32)); - if (adev->doorbell.ptr == NULL) - return -ENOMEM; - return 0; } @@ -174,6 +203,7 @@ int amdgpu_doorbell_init(struct amdgpu_device *adev) */ void amdgpu_doorbell_fini(struct amdgpu_device *adev) { - iounmap(adev->doorbell.ptr); - adev->doorbell.ptr = NULL; + amdgpu_bo_free_kernel(&adev->doorbell.kernel_doorbells, + NULL, + (void **)&adev->doorbell.cpu_addr); } diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h index 97c05d08a551..8880f3e3702e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h @@ -128,6 +128,9 @@ struct amdgpu_mes { int (*kiq_hw_init)(struct amdgpu_device *adev); int (*kiq_hw_fini)(struct amdgpu_device *adev); + /* MES doorbells */ + uint32_t db_start_dw_offset; + /* ip specific functions */ const struct amdgpu_mes_funcs *funcs; }; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index da65b72cba77..05dfa2fcb334 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1865,6 +1865,13 @@ int amdgpu_ttm_init(struct amdgpu_device *adev) return r; } + /* Create a boorbell page for kernel usages */ + r = amdgpu_doorbell_create_kernel_doorbells(adev); + if (r) { + DRM_ERROR("Failed to initialize kernel doorbells.\n"); + return r; + } + /* Initialize preemptible memory pool */ r = amdgpu_preempt_mgr_init(adev); if (r) { -- 2.40.0