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Commit ec63982e authored by Tom St Denis's avatar Tom St Denis Committed by Alex Deucher
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drm/amd/amdgpu: Correct ring wptr address in debugfs (v2) 



On gfx9 hardware the value is not wrapped and is a 64-bit value.  So
we reduce it modulo the ring size.

Signed-off-by: default avatarTom St Denis <tom.stdenis@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>

(v2) use buf_mask instead of computing on the fly

Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 1866bac8

drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c

+2 −2
Original line number Diff line number Diff line
@@ -320,8 +320,8 @@ static ssize_t amdgpu_debugfs_ring_read(struct file *f, char __user *buf, 


	if (*pos < 12) {

		early[0] = amdgpu_ring_get_rptr(ring);

		early[1] = amdgpu_ring_get_wptr(ring);

		early[2] = ring->wptr;

		early[1] = amdgpu_ring_get_wptr(ring) & ring->buf_mask;

		early[2] = ring->wptr & ring->buf_mask;

		for (i = *pos / 4; i < 3 && size; i++) {

			r = put_user(early[i], (uint32_t *)buf);

			if (r)