diff options
author | Christian König <christian.koenig@amd.com> | 2016-01-21 13:06:05 +0100 |
---|---|---|
committer | Alex Deucher <alexander.deucher@amd.com> | 2016-02-10 14:16:59 -0500 |
commit | c7e6be2303d0b6ee983eb72fee457967b85c91a6 (patch) | |
tree | 7d5df6ca7f0fa6e6b969e6df61749210ceaf1019 /drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | |
parent | a27de35caab59bacf5c47713856739f86ec06e43 (diff) | |
download | linux-c7e6be2303d0b6ee983eb72fee457967b85c91a6.tar.bz2 |
drm/amdgpu: remove rptr checking
With the scheduler enabled we don't need that any more.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c')
-rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 77 |
1 files changed, 25 insertions, 52 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c index 81d06d772dde..1f0db995046d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -49,28 +49,6 @@ static int amdgpu_debugfs_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring); /** - * amdgpu_ring_free_size - update the free size - * - * @adev: amdgpu_device pointer - * @ring: amdgpu_ring structure holding ring information - * - * Update the free dw slots in the ring buffer (all asics). - */ -void amdgpu_ring_free_size(struct amdgpu_ring *ring) -{ - uint32_t rptr = amdgpu_ring_get_rptr(ring); - - /* This works because ring_size is a power of 2 */ - ring->ring_free_dw = rptr + (ring->ring_size / 4); - ring->ring_free_dw -= ring->wptr; - ring->ring_free_dw &= ring->ptr_mask; - if (!ring->ring_free_dw) { - /* this is an empty ring */ - ring->ring_free_dw = ring->ring_size / 4; - } -} - -/** * amdgpu_ring_alloc - allocate space on the ring buffer * * @adev: amdgpu_device pointer @@ -82,24 +60,16 @@ void amdgpu_ring_free_size(struct amdgpu_ring *ring) */ int amdgpu_ring_alloc(struct amdgpu_ring *ring, unsigned ndw) { - int r; - - /* make sure we aren't trying to allocate more space than there is on the ring */ - if (ndw > (ring->ring_size / 4)) - return -ENOMEM; /* Align requested size with padding so unlock_commit can * pad safely */ - amdgpu_ring_free_size(ring); ndw = (ndw + ring->align_mask) & ~ring->align_mask; - while (ndw > (ring->ring_free_dw - 1)) { - amdgpu_ring_free_size(ring); - if (ndw < ring->ring_free_dw) { - break; - } - r = amdgpu_fence_wait_next(ring); - if (r) - return r; - } + + /* Make sure we aren't trying to allocate more space + * than the maximum for one submission + */ + if (WARN_ON_ONCE(ndw > ring->max_dw)) + return -ENOMEM; + ring->count_dw = ndw; ring->wptr_old = ring->wptr; return 0; @@ -326,7 +296,8 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring, } } ring->ptr_mask = (ring->ring_size / 4) - 1; - ring->ring_free_dw = ring->ring_size / 4; + ring->max_dw = DIV_ROUND_UP(ring->ring_size / 4, + amdgpu_sched_hw_submission); if (amdgpu_debugfs_ring_init(adev, ring)) { DRM_ERROR("Failed to register debugfs file for rings !\n"); @@ -406,25 +377,18 @@ static int amdgpu_debugfs_ring_info(struct seq_file *m, void *data) struct amdgpu_ring *ring = (void *)(((uint8_t*)adev) + roffset); uint32_t rptr, wptr, rptr_next; - unsigned count, i, j; - - amdgpu_ring_free_size(ring); - count = (ring->ring_size / 4) - ring->ring_free_dw; + unsigned i; wptr = amdgpu_ring_get_wptr(ring); - seq_printf(m, "wptr: 0x%08x [%5d]\n", - wptr, wptr); + seq_printf(m, "wptr: 0x%08x [%5d]\n", wptr, wptr); rptr = amdgpu_ring_get_rptr(ring); - seq_printf(m, "rptr: 0x%08x [%5d]\n", - rptr, rptr); - rptr_next = le32_to_cpu(*ring->next_rptr_cpu_addr); + seq_printf(m, "rptr: 0x%08x [%5d]\n", rptr, rptr); + seq_printf(m, "driver's copy of the wptr: 0x%08x [%5d]\n", ring->wptr, ring->wptr); - seq_printf(m, "%u free dwords in ring\n", ring->ring_free_dw); - seq_printf(m, "%u dwords in ring\n", count); if (!ring->ready) return 0; @@ -433,11 +397,20 @@ static int amdgpu_debugfs_ring_info(struct seq_file *m, void *data) * packet that is the root issue */ i = (rptr + ring->ptr_mask + 1 - 32) & ring->ptr_mask; - for (j = 0; j <= (count + 32); j++) { + while (i != rptr) { + seq_printf(m, "r[%5d]=0x%08x", i, ring->ring[i]); + if (i == rptr) + seq_puts(m, " *"); + if (i == rptr_next) + seq_puts(m, " #"); + seq_puts(m, "\n"); + i = (i + 1) & ring->ptr_mask; + } + while (i != wptr) { seq_printf(m, "r[%5d]=0x%08x", i, ring->ring[i]); - if (rptr == i) + if (i == rptr) seq_puts(m, " *"); - if (rptr_next == i) + if (i == rptr_next) seq_puts(m, " #"); seq_puts(m, "\n"); i = (i + 1) & ring->ptr_mask; |