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Merge branch 'msm-fixes-4.10' of git://people.freedesktop.org/~robclark/linux into drm-fixes 

A few fixes for 4.10.. the first fixes a long-standing logic bug, that
by luck (ie. size of packets written into RB for a submit) wasn't hit
on a3xx/a4xx but was causing intermittent GPU lockups on a5xx.  And a
couple other robustness issues that Jordan noticed.

* 'msm-fixes-4.10' of git://people.freedesktop.org/~robclark/linux:
  drm/msm: Verify that MSM_SUBMIT_BO_FLAGS are set
  drm/msm: Put back the vaddr in submit_reloc()
  drm/msm: Ensure that the hardware write pointer is valid
This commit is contained in:
Dave Airlie 2017-01-09 09:13:20 +10:00
parent 90e5d2d457 a6cb3b864b
commit 6906407eeb
3 changed files with 21 additions and 9 deletions
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9
drivers/gpu/drm/msm/adreno/adreno_gpu.c
View File

@ -213,7 +213,14 @@ void adreno_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
void adreno_flush(struct msm_gpu *gpu)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
uint32_t wptr = get_wptr(gpu->rb);
uint32_t wptr;
/*
* Mask wptr value that we calculate to fit in the HW range. This is
* to account for the possibility that the last command fit exactly into
* the ringbuffer and rb->next hasn't wrapped to zero yet
*/
wptr = get_wptr(gpu->rb) & ((gpu->rb->size / 4) - 1);
/* ensure writes to ringbuffer have hit system memory: */
mb();

18
drivers/gpu/drm/msm/msm_gem_submit.c
View File

@ -106,7 +106,8 @@ static int submit_lookup_objects(struct msm_gem_submit *submit,
pagefault_disable();
}
if (submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) {
if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
!(submit_bo.flags & MSM_SUBMIT_BO_FLAGS)) {
DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
ret = -EINVAL;
goto out_unlock;
@ -290,7 +291,7 @@ static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *ob
{
uint32_t i, last_offset = 0;
uint32_t *ptr;
int ret;
int ret = 0;
if (offset % 4) {
DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
@ -318,12 +319,13 @@ static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *ob
ret = copy_from_user(&submit_reloc, userptr, sizeof(submit_reloc));
if (ret)
return -EFAULT;
goto out;
if (submit_reloc.submit_offset % 4) {
DRM_ERROR("non-aligned reloc offset: %u\n",
submit_reloc.submit_offset);
return -EINVAL;
ret = -EINVAL;
goto out;
}
/* offset in dwords: */
@ -332,12 +334,13 @@ static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *ob
if ((off >= (obj->base.size / 4)) ||
(off < last_offset)) {
DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
return -EINVAL;
ret = -EINVAL;
goto out;
}
ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
if (ret)
return ret;
goto out;
if (valid)
continue;
@ -354,9 +357,10 @@ static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *ob
last_offset = off;
}
out:
msm_gem_put_vaddr_locked(&obj->base);
return 0;
return ret;
}
static void submit_cleanup(struct msm_gem_submit *submit)

3
drivers/gpu/drm/msm/msm_ringbuffer.c
View File

@ -23,7 +23,8 @@ struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int size)
struct msm_ringbuffer *ring;
int ret;
size = ALIGN(size, 4); /* size should be dword aligned */
if (WARN_ON(!is_power_of_2(size)))
return ERR_PTR(-EINVAL);
ring = kzalloc(sizeof(*ring), GFP_KERNEL);
if (!ring) {