On 29/03/17 01:07 PM, Tom St Denis wrote:
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: Tom St Denis <tom.stde...@amd.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c index ac0ce3f27f87..b6d2c0b2a501 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -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->ring_size >> 2) - 1); + early[2] = ring->wptr & ((ring->ring_size >> 2) - 1); for (i = *pos / 4; i < 3 && size; i++) { r = put_user(early[i], (uint32_t *)buf); if (r)
Particularly if reviewers could make sure I got the dword/byte conversion correct here. It's my understanding ring_size is bytes and the get_*ptr() macros is in dwords right?
Tom _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx
