diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-11-29 23:13:28 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-11-30 12:21:12 +0300 |
| commit | 3cd6e8860ecd40f358b9d30d5bfecbc74fd7cfef (patch) | |
| tree | 661769d0f711b9d18ccdc2c33539a9bf40f8fdc8 /drivers/gpu/drm/i915/i915_gem_gtt.c | |
| parent | f9a863c2ffc17f72137fae8cac3314961dc6be24 (diff) | |
| download | linux-3cd6e8860ecd40f358b9d30d5bfecbc74fd7cfef.tar.xz | |
drm/i915/gen7: Re-enable full-ppgtt for ivb & hsw
After much hair pulling, resort to preallocating the ppGTT entries on
init to circumvent the apparent lack of PD invalidate following the
write to PP_DCLV upon switching mm between contexts (and here the same
context after binding new objects). However, the details of that PP_DCLV
invalidate are still unknown, and it appears we need to reload the mm
twice to cover over a timing issue. Worrying.
Fixes: 3dc007fe9b2b ("drm/i915/gtt: Downgrade gen7 (ivb, byt, hsw) back to aliasing-ppgtt")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191129201328.1398583-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 6239a9adbf14..98835fea38a9 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -1692,7 +1692,6 @@ static int gen6_alloc_va_range(struct i915_address_space *vm, intel_wakeref_t wakeref; u64 from = start; unsigned int pde; - bool flush = false; int ret = 0; wakeref = intel_runtime_pm_get(&vm->i915->runtime_pm); @@ -1717,11 +1716,6 @@ static int gen6_alloc_va_range(struct i915_address_space *vm, spin_lock(&pd->lock); if (pd->entry[pde] == &vm->scratch[1]) { pd->entry[pde] = pt; - if (i915_vma_is_bound(ppgtt->vma, - I915_VMA_GLOBAL_BIND)) { - gen6_write_pde(ppgtt, pde, pt); - flush = true; - } } else { alloc = pt; pt = pd->entry[pde]; @@ -1732,9 +1726,19 @@ static int gen6_alloc_va_range(struct i915_address_space *vm, } spin_unlock(&pd->lock); - if (flush) + if (i915_vma_is_bound(ppgtt->vma, I915_VMA_GLOBAL_BIND)) { + mutex_lock(&ppgtt->flush); + + /* Rewrite them all! Anything less misses an invalidate. */ + gen6_for_all_pdes(pt, pd, pde) + gen6_write_pde(ppgtt, pde, pt); + + ioread32(ppgtt->pd_addr + pde - 1); gen6_ggtt_invalidate(vm->gt->ggtt); + mutex_unlock(&ppgtt->flush); + } + goto out; unwind_out: @@ -1793,6 +1797,7 @@ static void gen6_ppgtt_cleanup(struct i915_address_space *vm) gen6_ppgtt_free_pd(ppgtt); free_scratch(vm); + mutex_destroy(&ppgtt->flush); mutex_destroy(&ppgtt->pin_mutex); kfree(ppgtt->base.pd); } @@ -1958,6 +1963,7 @@ static struct i915_ppgtt *gen6_ppgtt_create(struct drm_i915_private *i915) if (!ppgtt) return ERR_PTR(-ENOMEM); + mutex_init(&ppgtt->flush); mutex_init(&ppgtt->pin_mutex); ppgtt_init(&ppgtt->base, &i915->gt); @@ -1994,6 +2000,7 @@ err_scratch: err_pd: kfree(ppgtt->base.pd); err_free: + mutex_destroy(&ppgtt->pin_mutex); kfree(ppgtt); return ERR_PTR(err); } |