[PATCH v4 05/10] drm/amdgpu: create context space for usermode queue
Deucher, Alexander
Alexander.Deucher at amd.com
Tue Apr 25 17:38:16 UTC 2023
[Public]
> -----Original Message-----
> From: Sharma, Shashank <Shashank.Sharma at amd.com>
> Sent: Tuesday, April 25, 2023 9:13 AM
> To: Koenig, Christian <Christian.Koenig at amd.com>; amd-
> gfx at lists.freedesktop.org
> Cc: Yadav, Arvind <Arvind.Yadav at amd.com>; Pelloux-Prayer, Pierre-Eric
> <Pierre-eric.Pelloux-prayer at amd.com>;
> contactshashanksharma at gmail.com; Deucher, Alexander
> <Alexander.Deucher at amd.com>
> Subject: Re: [PATCH v4 05/10] drm/amdgpu: create context space for
> usermode queue
>
>
> On 25/04/2023 14:30, Christian König wrote:
> > Am 24.04.23 um 19:38 schrieb 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 for each 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)
> >>
> >> 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>
> >> ---
> >> drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c | 57
> >> ++++++++++++++++++-
> >> .../gpu/drm/amd/include/amdgpu_userqueue.h | 6 ++
> >> 2 files changed, 61 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
> >> b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
> >> index 9f7b14966ac8..f6b33faea86f 100644
> >> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
> >> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
> >> @@ -53,6 +53,11 @@
> >> #define GFX11_NUM_GFX_RINGS 1
> >> #define GFX11_MEC_HPD_SIZE 2048
> >> +#define AMDGPU_USERQ_PROC_CTX_SZ PAGE_SIZE
> >> +#define AMDGPU_USERQ_GANG_CTX_SZ PAGE_SIZE #define
> >> +AMDGPU_USERQ_FW_CTX_SZ PAGE_SIZE #define
> AMDGPU_USERQ_GDS_CTX_SZ
> >> +PAGE_SIZE
> >> +
> >> #define RLCG_UCODE_LOADING_START_ADDRESS 0x00002000L
> >> #define RLC_PG_DELAY_3_DEFAULT_GC_11_0_1 0x1388
> >> @@ -6406,6 +6411,44 @@ const struct amdgpu_ip_block_version
> >> gfx_v11_0_ip_block =
> >> .funcs = &gfx_v11_0_ip_funcs,
> >> };
> >> +static int gfx_v11_userq_create_ctx_space(struct amdgpu_userq_mgr
> >> *uq_mgr,
> >> + struct amdgpu_usermode_queue *queue) {
> >> + struct amdgpu_device *adev = uq_mgr->adev;
> >> + struct amdgpu_userq_ctx_space *ctx = &queue->fw_space;
> >> + int r, size;
> >> +
> >> + /*
> >> + * The FW expects at least one page space allocated for
> >> + * process ctx, gang ctx, gds ctx, fw ctx each.
> >> + */
> >> + size = AMDGPU_USERQ_PROC_CTX_SZ +
> AMDGPU_USERQ_FW_CTX_SZ +
> >> + AMDGPU_USERQ_GANG_CTX_SZ +
> AMDGPU_USERQ_GDS_CTX_SZ;
> >> + r = amdgpu_bo_create_kernel(adev, size, PAGE_SIZE,
> >> + AMDGPU_GEM_DOMAIN_GTT,
> >> + &ctx->obj,
> >> + &ctx->gpu_addr,
> >> + &ctx->cpu_ptr);
> >
> > Wasn't this stuff provided by userspace now?
> >
> The last I checked, only the shadow buffer was coming from userspace, and
> we were thinking about other stuff. I might not be well updated if there any
> recent development here with the short term solution.
CSA, GDS backup, and shadow are allocated by userspace now.
Alex
>
> - Shashank
>
> > Christian.
> >
> >> + if (r) {
> >> + DRM_ERROR("Failed to allocate ctx space bo for userqueue,
> >> err:%d\n", r);
> >> + return r;
> >> + }
> >> +
> >> + queue->proc_ctx_gpu_addr = ctx->gpu_addr;
> >> + queue->gang_ctx_gpu_addr = queue->proc_ctx_gpu_addr +
> >> AMDGPU_USERQ_PROC_CTX_SZ;
> >> + queue->fw_ctx_gpu_addr = queue->gang_ctx_gpu_addr +
> >> AMDGPU_USERQ_GANG_CTX_SZ;
> >> + queue->gds_ctx_gpu_addr = queue->fw_ctx_gpu_addr +
> >> AMDGPU_USERQ_FW_CTX_SZ;
> >> + return 0;
> >> +}
> >> +
> >> +static void gfx_v11_userq_destroy_ctx_space(struct
> amdgpu_userq_mgr
> >> *uq_mgr,
> >> + struct amdgpu_usermode_queue *queue) {
> >> + struct amdgpu_userq_ctx_space *ctx = &queue->fw_space;
> >> +
> >> + amdgpu_bo_free_kernel(&ctx->obj, &ctx->gpu_addr, &ctx-
> >cpu_ptr);
> >> +}
> >> +
> >> static int
> >> gfx_v11_userq_mqd_create(struct amdgpu_userq_mgr *uq_mgr, struct
> >> amdgpu_usermode_queue *queue)
> >> {
> >> @@ -6426,10 +6469,16 @@ gfx_v11_userq_mqd_create(struct
> >> amdgpu_userq_mgr *uq_mgr, struct amdgpu_usermode
> >> }
> >> memset(mqd->cpu_ptr, 0, size);
> >> + r = gfx_v11_userq_create_ctx_space(uq_mgr, queue);
> >> + if (r) {
> >> + DRM_ERROR("Failed to create CTX space for userqueue (%d)\n",
> >> r);
> >> + goto free_mqd;
> >> + }
> >> +
> >> r = amdgpu_bo_reserve(mqd->obj, false);
> >> if (unlikely(r != 0)) {
> >> DRM_ERROR("Failed to reserve mqd for userqueue (%d)", r);
> >> - goto free_mqd;
> >> + goto free_ctx;
> >> }
> >> queue->userq_prop.use_doorbell = true; @@ -6438,12 +6487,15
> >> @@ gfx_v11_userq_mqd_create(struct amdgpu_userq_mgr *uq_mgr,
> struct
> >> amdgpu_usermode
> >> amdgpu_bo_unreserve(mqd->obj);
> >> if (r) {
> >> DRM_ERROR("Failed to init MQD for queue\n");
> >> - goto free_mqd;
> >> + goto free_ctx;
> >> }
> >> DRM_DEBUG_DRIVER("MQD for queue %d created\n",
> >> queue->queue_id);
> >> return 0;
> >> +free_ctx:
> >> + gfx_v11_userq_destroy_ctx_space(uq_mgr, queue);
> >> +
> >> free_mqd:
> >> amdgpu_bo_free_kernel(&mqd->obj, &mqd->gpu_addr,
> >> &mqd->cpu_ptr);
> >> return r;
> >> @@ -6454,6 +6506,7 @@ gfx_v11_userq_mqd_destroy(struct
> >> amdgpu_userq_mgr *uq_mgr, struct amdgpu_usermod
> >> {
> >> struct amdgpu_userq_ctx_space *mqd = &queue->mqd;
> >> + gfx_v11_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 e7da27918bd2..11e8ad649f6e 100644
> >> --- a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
> >> +++ b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
> >> @@ -38,11 +38,17 @@ struct amdgpu_usermode_queue {
> >> int queue_id;
> >> int queue_type;
> >> uint64_t doorbell_handle;
> >> + uint64_t proc_ctx_gpu_addr;
> >> + uint64_t gang_ctx_gpu_addr;
> >> + uint64_t gds_ctx_gpu_addr;
> >> + uint64_t fw_ctx_gpu_addr;
> >> + uint64_t shadow_ctx_gpu_addr;
> >> uint64_t flags;
> >> struct amdgpu_mqd_prop userq_prop;
> >> struct amdgpu_userq_mgr *userq_mgr;
> >> struct amdgpu_vm *vm;
> >> struct amdgpu_userq_ctx_space mqd;
> >> + struct amdgpu_userq_ctx_space fw_space;
> >> };
> >> struct amdgpu_userq_funcs {
> >
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