[PATCH v6 5/9] drm/amdgpu: create context space for usermode queue

[Shashank Sharma]

The FW expects us to allocate at least one page as context
space to process gang, process, GDS and FW  related work.
This patch creates a joint object for the same, and calculates
GPU space offsets of these spaces.

V1: Addressed review comments on RFC patch:
    Alex: Make this function IP specific

V2: Addressed review comments from Christian
    - Allocate only one object for total FW space, and calculate
      offsets for each of these objects.

V3: Integration with doorbell manager

V4: Review comments:
    - Remove shadow from FW space list from cover letter (Alex)
    - Alignment of macro (Luben)

V5: Merged patches 5 and 6 into this single patch
    Addressed review comments:
    - Use lower_32_bits instead of mask (Christian)
    - gfx_v11_0 instead of gfx_v11 in function names (Alex)
    - Shadow and GDS objects are now coming from userspace (Christian,
      Alex)

V6:
    - Add a comment to replace amdgpu_bo_create_kernel() with
      amdgpu_bo_create() during fw_ctx object creation (Christian).
    - Move proc_ctx_gpu_addr, gang_ctx_gpu_addr and fw_ctx_gpu_addr out
      of generic queue structure and make it gen11 specific (Alex).

Cc: Alex Deucher <alexander.deucher at amd.com>
Cc: Christian Koenig <christian.koenig at amd.com>
Signed-off-by: Shashank Sharma <shashank.sharma at amd.com>
Signed-off-by: Arvind Yadav <arvind.yadav at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c        | 61 +++++++++++++++++++
 .../gpu/drm/amd/include/amdgpu_userqueue.h    |  1 +
 2 files changed, 62 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
index 6760abda08df..8ffb5dee72a9 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
@@ -61,6 +61,9 @@
 #define regCGTT_WD_CLK_CTRL_BASE_IDX	1
 #define regRLC_RLCS_BOOTLOAD_STATUS_gc_11_0_1	0x4e7e
 #define regRLC_RLCS_BOOTLOAD_STATUS_gc_11_0_1_BASE_IDX	1
+#define AMDGPU_USERQ_PROC_CTX_SZ   PAGE_SIZE
+#define AMDGPU_USERQ_GANG_CTX_SZ   PAGE_SIZE
+#define AMDGPU_USERQ_FW_CTX_SZ     PAGE_SIZE
 
 MODULE_FIRMWARE("amdgpu/gc_11_0_0_pfp.bin");
 MODULE_FIRMWARE("amdgpu/gc_11_0_0_me.bin");
@@ -6424,6 +6427,56 @@ const struct amdgpu_ip_block_version gfx_v11_0_ip_block =
 	.funcs = &gfx_v11_0_ip_funcs,
 };
 
+static void gfx_v11_0_userq_destroy_ctx_space(struct amdgpu_userq_mgr *uq_mgr,
+					      struct amdgpu_usermode_queue *queue)
+{
+	struct amdgpu_userq_obj *ctx = &queue->fw_obj;
+
+	amdgpu_bo_free_kernel(&ctx->obj, &ctx->gpu_addr, &ctx->cpu_ptr);
+}
+
+static int gfx_v11_0_userq_create_ctx_space(struct amdgpu_userq_mgr *uq_mgr,
+					    struct amdgpu_usermode_queue *queue,
+					    struct drm_amdgpu_userq_mqd_gfx_v11_0 *mqd_user)
+{
+	struct amdgpu_device *adev = uq_mgr->adev;
+	struct amdgpu_userq_obj *ctx = &queue->fw_obj;
+	struct v11_gfx_mqd *mqd = queue->mqd.cpu_ptr;
+	uint64_t fw_ctx_gpu_addr;
+	int r, size;
+
+	/*
+	 * The FW expects at least one page space allocated for
+	 * process ctx, gang ctx and fw ctx each. Create an object
+	 * for the same.
+	 */
+	size = AMDGPU_USERQ_PROC_CTX_SZ + AMDGPU_USERQ_FW_CTX_SZ +
+	       AMDGPU_USERQ_GANG_CTX_SZ;
+	r = amdgpu_bo_create_kernel(adev, size, PAGE_SIZE,
+				    AMDGPU_GEM_DOMAIN_GTT,
+				    &ctx->obj,
+				    &ctx->gpu_addr,
+				    &ctx->cpu_ptr);
+	if (r) {
+		DRM_ERROR("Failed to allocate ctx space bo for userqueue, err:%d\n", r);
+		return r;
+	}
+
+	fw_ctx_gpu_addr = ctx->gpu_addr + AMDGPU_USERQ_PROC_CTX_SZ +
+			  AMDGPU_USERQ_GANG_CTX_SZ;
+	mqd->fw_work_area_base_lo = lower_32_bits(fw_ctx_gpu_addr);
+	mqd->fw_work_area_base_lo = upper_32_bits(fw_ctx_gpu_addr);
+
+	/* Shadow and GDS objects come directly from userspace */
+	mqd->shadow_base_lo = lower_32_bits(mqd_user->shadow_va);
+	mqd->shadow_base_hi = upper_32_bits(mqd_user->shadow_va);
+
+	mqd->gds_bkup_base_lo = lower_32_bits(mqd_user->gds_va);
+	mqd->gds_bkup_base_hi = upper_32_bits(mqd_user->gds_va);
+
+	return 0;
+}
+
 static int gfx_v11_0_userq_mqd_create(struct amdgpu_userq_mgr *uq_mgr,
 				      struct drm_amdgpu_userq_in *args_in,
 				      struct amdgpu_usermode_queue *queue)
@@ -6480,6 +6533,13 @@ static int gfx_v11_0_userq_mqd_create(struct amdgpu_userq_mgr *uq_mgr,
 		goto free_mqd;
 	}
 
+	/* Create BO for FW operations */
+	r = gfx_v11_0_userq_create_ctx_space(uq_mgr, queue, &mqd_user);
+	if (r) {
+		DRM_ERROR("Failed to allocate BO for userqueue (%d)", r);
+		goto free_mqd;
+	}
+
 	return 0;
 
 free_mqd:
@@ -6492,6 +6552,7 @@ gfx_v11_0_userq_mqd_destroy(struct amdgpu_userq_mgr *uq_mgr, struct amdgpu_userm
 {
 	struct amdgpu_userq_obj *mqd = &queue->mqd;
 
+	gfx_v11_0_userq_destroy_ctx_space(uq_mgr, queue);
 	amdgpu_bo_free_kernel(&mqd->obj, &mqd->gpu_addr, &mqd->cpu_ptr);
 }
 
diff --git a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
index 240f92796f00..34e20daa06c8 100644
--- a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
+++ b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
@@ -44,6 +44,7 @@ struct amdgpu_usermode_queue {
 	struct amdgpu_userq_mgr *userq_mgr;
 	struct amdgpu_vm	*vm;
 	struct amdgpu_userq_obj mqd;
+	struct amdgpu_userq_obj fw_obj;
 };
 
 struct amdgpu_userq_funcs {
-- 
2.42.0