On Mon, Jan 25, 2010 at 04:02:37PM +1000, Dave Airlie wrote:
> On Sat, Jan 23, 2010 at 1:56 AM, Jerome Glisse <jgli...@redhat.com> wrote:
> > If an error happen in r600_blit_prepare_copy report it rather
> > than WARNING and keeping execution. For instance if ib allocation
> > failed we did just warn about but then latter tried to access
> > NULL ib ptr causing oops. This patch also protect r600_copy_blit
> > with a mutex as otherwise one process might overwrite blit temporary
> > data with new one possibly leading to GPU lockup.
>
> Did you boot this to X on any relevant hw?
>
> it totally fails to start gdm here on my r600 card.
>
> I'm assuming because you now never pin the shader object at all from
> what I can see, since _startup gets called before blit_init.
>
> Please no more crap like this unless you are doing
> serious boot testing on it.
>
> > radeon_bo_unref(&rdev->r600_blit.shader_obj);
> > + rdev->r600_blit.shader_obj = NULL;
> > }
>
> And WTF? ^^^ you wrote radeon_bo_unref you should
> know what it does.
>
> Dave.
Sorry i did V2 in hurry and didn't test it, here is V3 tested
on R6XX & R7XX.
Cheers,
Jerome
>From 57fecda40f7fdda5500a361b2df2ac047dca5aba Mon Sep 17 00:00:00 2001
From: Jerome Glisse <jgli...@redhat.com>
Date: Fri, 22 Jan 2010 15:19:00 +0100
Subject: [PATCH] drm/radeon/kms: Bailout of blit if error happen & protect with
mutex V3
If an error happen in r600_blit_prepare_copy report it rather
than WARNING and keeping execution. For instance if ib allocation
failed we did just warn about but then latter tried to access
NULL ib ptr causing oops. This patch also protect r600_copy_blit
with a mutex as otherwise one process might overwrite blit temporary
data with new one possibly leading to GPU lockup.
Should partialy or totaly fix:
https://bugzilla.redhat.com/show_bug.cgi?id=553279
V2 failing blit initialization is not fatal, fallback to memcpy when
this happen
V3 init blit before startup as we pin in startup, remove duplicate
code (this one was actualy tested unlike V2)
Signed-off-by: Jerome Glisse <jgli...@redhat.com>
---
drivers/gpu/drm/radeon/r600.c | 54 ++++++++++++++++----------------
drivers/gpu/drm/radeon/r600_blit_kms.c | 7 +++-
drivers/gpu/drm/radeon/radeon.h | 1 +
drivers/gpu/drm/radeon/rv770.c | 31 +++++++++---------
4 files changed, 48 insertions(+), 45 deletions(-)
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index d0bd117..b833b4b 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -1788,23 +1788,24 @@ void r600_fence_ring_emit(struct radeon_device *rdev,
radeon_ring_write(rdev, RB_INT_STAT);
}
-int r600_copy_dma(struct radeon_device *rdev,
- uint64_t src_offset,
- uint64_t dst_offset,
- unsigned num_pages,
- struct radeon_fence *fence)
-{
- /* FIXME: implement */
- return 0;
-}
-
int r600_copy_blit(struct radeon_device *rdev,
uint64_t src_offset, uint64_t dst_offset,
unsigned num_pages, struct radeon_fence *fence)
{
- r600_blit_prepare_copy(rdev, num_pages * RADEON_GPU_PAGE_SIZE);
+ int r;
+
+ mutex_lock(&rdev->r600_blit.mutex);
+ rdev->r600_blit.vb_ib = NULL;
+ r = r600_blit_prepare_copy(rdev, num_pages * RADEON_GPU_PAGE_SIZE);
+ if (r) {
+ if (rdev->r600_blit.vb_ib)
+ radeon_ib_free(rdev, &rdev->r600_blit.vb_ib);
+ mutex_unlock(&rdev->r600_blit.mutex);
+ return r;
+ }
r600_kms_blit_copy(rdev, src_offset, dst_offset, num_pages *
RADEON_GPU_PAGE_SIZE);
r600_blit_done_copy(rdev, fence);
+ mutex_unlock(&rdev->r600_blit.mutex);
return 0;
}
@@ -1860,26 +1861,19 @@ int r600_startup(struct radeon_device *rdev)
return r;
}
r600_gpu_init(rdev);
-
- if (!rdev->r600_blit.shader_obj) {
- r = r600_blit_init(rdev);
+ /* pin copy shader into vram */
+ if (rdev->r600_blit.shader_obj) {
+ r = radeon_bo_reserve(rdev->r600_blit.shader_obj, false);
+ if (unlikely(r != 0))
+ return r;
+ r = radeon_bo_pin(rdev->r600_blit.shader_obj,
RADEON_GEM_DOMAIN_VRAM,
+ &rdev->r600_blit.shader_gpu_addr);
+ radeon_bo_unreserve(rdev->r600_blit.shader_obj);
if (r) {
- DRM_ERROR("radeon: failed blitter (%d).\n", r);
+ dev_err(rdev->dev, "(%d) pin blit object failed\n", r);
return r;
}
}
-
- r = radeon_bo_reserve(rdev->r600_blit.shader_obj, false);
- if (unlikely(r != 0))
- return r;
- r = radeon_bo_pin(rdev->r600_blit.shader_obj, RADEON_GEM_DOMAIN_VRAM,
- &rdev->r600_blit.shader_gpu_addr);
- radeon_bo_unreserve(rdev->r600_blit.shader_obj);
- if (r) {
- dev_err(rdev->dev, "(%d) pin blit object failed\n", r);
- return r;
- }
-
/* Enable IRQ */
r = r600_irq_init(rdev);
if (r) {
@@ -2051,6 +2045,12 @@ int r600_init(struct radeon_device *rdev)
r = r600_pcie_gart_init(rdev);
if (r)
return r;
+ r = r600_blit_init(rdev);
+ if (r) {
+ r600_blit_fini(rdev);
+ rdev->asic->copy = NULL;
+ dev_warn(rdev->dev, "failed blitter (%d) falling back to
memcpy\n", r);
+ }
rdev->accel_working = true;
r = r600_startup(rdev);
diff --git a/drivers/gpu/drm/radeon/r600_blit_kms.c
b/drivers/gpu/drm/radeon/r600_blit_kms.c
index 2bedce4..af1c3ca 100644
--- a/drivers/gpu/drm/radeon/r600_blit_kms.c
+++ b/drivers/gpu/drm/radeon/r600_blit_kms.c
@@ -449,6 +449,7 @@ int r600_blit_init(struct radeon_device *rdev)
u32 packet2s[16];
int num_packet2s = 0;
+ mutex_init(&rdev->r600_blit.mutex);
rdev->r600_blit.state_offset = 0;
if (rdev->family >= CHIP_RV770)
@@ -557,7 +558,8 @@ int r600_blit_prepare_copy(struct radeon_device *rdev, int
size_bytes)
int dwords_per_loop = 76, num_loops;
r = r600_vb_ib_get(rdev);
- WARN_ON(r);
+ if (r)
+ return r;
/* set_render_target emits 2 extra dwords on rv6xx */
if (rdev->family > CHIP_R600 && rdev->family < CHIP_RV770)
@@ -583,7 +585,8 @@ int r600_blit_prepare_copy(struct radeon_device *rdev, int
size_bytes)
ring_size += 5; /* done copy */
ring_size += 7; /* fence emit for done copy */
r = radeon_ring_lock(rdev, ring_size);
- WARN_ON(r);
+ if (r)
+ return r;
set_default_state(rdev); /* 14 */
set_shaders(rdev); /* 26 */
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index f7df1a7..2d5f2bf 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -416,6 +416,7 @@ struct r600_ih {
};
struct r600_blit {
+ struct mutex mutex;
struct radeon_bo *shader_obj;
u64 shader_gpu_addr;
u32 vs_offset, ps_offset;
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index cf8f2b1..2d46576 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -887,26 +887,19 @@ static int rv770_startup(struct radeon_device *rdev)
return r;
}
rv770_gpu_init(rdev);
-
- if (!rdev->r600_blit.shader_obj) {
- r = r600_blit_init(rdev);
+ /* pin copy shader into vram */
+ if (rdev->r600_blit.shader_obj) {
+ r = radeon_bo_reserve(rdev->r600_blit.shader_obj, false);
+ if (unlikely(r != 0))
+ return r;
+ r = radeon_bo_pin(rdev->r600_blit.shader_obj,
RADEON_GEM_DOMAIN_VRAM,
+ &rdev->r600_blit.shader_gpu_addr);
+ radeon_bo_unreserve(rdev->r600_blit.shader_obj);
if (r) {
- DRM_ERROR("radeon: failed blitter (%d).\n", r);
+ DRM_ERROR("failed to pin blit object %d\n", r);
return r;
}
}
-
- r = radeon_bo_reserve(rdev->r600_blit.shader_obj, false);
- if (unlikely(r != 0))
- return r;
- r = radeon_bo_pin(rdev->r600_blit.shader_obj, RADEON_GEM_DOMAIN_VRAM,
- &rdev->r600_blit.shader_gpu_addr);
- radeon_bo_unreserve(rdev->r600_blit.shader_obj);
- if (r) {
- DRM_ERROR("failed to pin blit object %d\n", r);
- return r;
- }
-
/* Enable IRQ */
r = r600_irq_init(rdev);
if (r) {
@@ -1062,6 +1055,12 @@ int rv770_init(struct radeon_device *rdev)
r = r600_pcie_gart_init(rdev);
if (r)
return r;
+ r = r600_blit_init(rdev);
+ if (r) {
+ r600_blit_fini(rdev);
+ rdev->asic->copy = NULL;
+ dev_warn(rdev->dev, "failed blitter (%d) falling back to
memcpy\n", r);
+ }
rdev->accel_working = true;
r = rv770_startup(rdev);
--
1.6.6
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