diff options
author | Matthew Auld <matthew.auld@intel.com> | 2021-04-27 09:54:13 +0100 |
---|---|---|
committer | Matthew Auld <matthew.auld@intel.com> | 2021-04-27 16:21:47 +0100 |
commit | 529b9ec809a0a073192e5dc757fc383e11926661 (patch) | |
tree | 0a0ddef7b05ca6910d61a4caecc3d8742219810f /drivers/gpu/drm/i915/gt/gen6_ppgtt.c | |
parent | fa85bfd19c26739c4cc02afbbab2588332648e9d (diff) |
drm/i915/gtt: map the PD up front
We need to generalise our accessor for the page directories and tables from
using the simple kmap_atomic to support local memory, and this setup
must be done on acquisition of the backing storage prior to entering
fence execution contexts. Here we replace the kmap with the object
mapping code that for simple single page shmemfs object will return a
plain kmap, that is then kept for the lifetime of the page directory.
Note that keeping the mapping around is a potential concern here, since
while the vma is pinned the mapping remains there for the PDs
underneath, or at least until the used_count reaches zero, at which
point we can safely destroy the mapping. For 32b this will be even worse
since the address space is more limited, but since this change mostly
impacts full ppGTT platforms, the justification is that for modern
platforms we shouldn't care too much about 32b.
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210427085417.120246-3-matthew.auld@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/gt/gen6_ppgtt.c')
-rw-r--r-- | drivers/gpu/drm/i915/gt/gen6_ppgtt.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c index e08dff376339..21b1085769be 100644 --- a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c +++ b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c @@ -96,9 +96,8 @@ static void gen6_ppgtt_clear_range(struct i915_address_space *vm, * entries back to scratch. */ - vaddr = kmap_atomic_px(pt); + vaddr = px_vaddr(pt); memset32(vaddr + pte, scratch_pte, count); - kunmap_atomic(vaddr); pte = 0; } @@ -120,7 +119,7 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm, GEM_BUG_ON(!pd->entry[act_pt]); - vaddr = kmap_atomic_px(i915_pt_entry(pd, act_pt)); + vaddr = px_vaddr(i915_pt_entry(pd, act_pt)); do { GEM_BUG_ON(sg_dma_len(iter.sg) < I915_GTT_PAGE_SIZE); vaddr[act_pte] = pte_encode | GEN6_PTE_ADDR_ENCODE(iter.dma); @@ -136,12 +135,10 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm, } if (++act_pte == GEN6_PTES) { - kunmap_atomic(vaddr); - vaddr = kmap_atomic_px(i915_pt_entry(pd, ++act_pt)); + vaddr = px_vaddr(i915_pt_entry(pd, ++act_pt)); act_pte = 0; } } while (1); - kunmap_atomic(vaddr); vma->page_sizes.gtt = I915_GTT_PAGE_SIZE; } @@ -235,7 +232,7 @@ static int gen6_ppgtt_init_scratch(struct gen6_ppgtt *ppgtt) goto err_scratch0; } - ret = pin_pt_dma(vm, vm->scratch[1]); + ret = map_pt_dma(vm, vm->scratch[1]); if (ret) goto err_scratch1; |