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drm/amdgpu/gfx: decouple the number of kgqs from the hw

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The driver currently sets up one kgq per pipe.  As such
adev->gfx.me.num_queue_per_pipe is hardcoded to 1 everywhere.
This is fine for kernel queues, but when we enable user queues
we need to know that actual number of queues per pipe.  Decouple
the kgq setup from the actual hardware count.  For dev core
dumps and user queues, we want to know the actual number
of queues per pipe.

Reviewed-by: Sunil Khatri <sunil.khatri@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2025-03-20 14:10:17 -04:00
parent 0d47bb77b5
commit 8f970c46b5
4 changed files with 13 additions and 9 deletions
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13
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
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@@ -77,11 +77,12 @@ bool amdgpu_gfx_is_mec_queue_enabled(struct amdgpu_device *adev,
static int amdgpu_gfx_me_queue_to_bit(struct amdgpu_device *adev,
int me, int pipe, int queue)
{
int num_queue_per_pipe = 1; /* we only enable 1 KGQ per pipe */
int bit = 0;
bit += me * adev->gfx.me.num_pipe_per_me
* adev->gfx.me.num_queue_per_pipe;
bit += pipe * adev->gfx.me.num_queue_per_pipe;
* num_queue_per_pipe;
bit += pipe * num_queue_per_pipe;
bit += queue;
return bit;
@@ -238,8 +239,8 @@ void amdgpu_gfx_graphics_queue_acquire(struct amdgpu_device *adev)
{
int i, queue, pipe;
bool multipipe_policy = amdgpu_gfx_is_graphics_multipipe_capable(adev);
int max_queues_per_me = adev->gfx.me.num_pipe_per_me *
adev->gfx.me.num_queue_per_pipe;
int num_queue_per_pipe = 1; /* we only enable 1 KGQ per pipe */
int max_queues_per_me = adev->gfx.me.num_pipe_per_me * num_queue_per_pipe;
if (multipipe_policy) {
/* policy: amdgpu owns the first queue per pipe at this stage
@@ -247,9 +248,9 @@ void amdgpu_gfx_graphics_queue_acquire(struct amdgpu_device *adev)
for (i = 0; i < max_queues_per_me; i++) {
pipe = i % adev->gfx.me.num_pipe_per_me;
queue = (i / adev->gfx.me.num_pipe_per_me) %
adev->gfx.me.num_queue_per_pipe;
num_queue_per_pipe;
set_bit(pipe * adev->gfx.me.num_queue_per_pipe + queue,
set_bit(pipe * num_queue_per_pipe + queue,
adev->gfx.me.queue_bitmap);
}
} else {