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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-08-21 16:57:25 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-08-21 17:58:54 +0100 |
| commit | c71ccbe26376e81de6582c68c6783de488fe9e24 (patch) | |
| tree | 7543112ec2a58590908c42468f42e9a5da22b58e /drivers | |
| parent | 1b9bd09630d4db4827cc04d358a41a16a6bc2cb0 (diff) | |
| download | linux-c71ccbe26376e81de6582c68c6783de488fe9e24.tar.bz2 | |
drm/i915/gtt: Add some range asserts
These should have been validated in the upper layers, but for sanity's
sake, repeat them.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190821155728.2839-2-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index b06d1d9054ba..0b81e0b64393 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -965,8 +965,10 @@ static u64 __gen8_ppgtt_clear(struct i915_address_space * const vm, const struct i915_page_scratch * const scratch = &vm->scratch[lvl]; unsigned int idx, len; + GEM_BUG_ON(end > vm->total >> GEN8_PTE_SHIFT); + len = gen8_pd_range(start, end, lvl--, &idx); - DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d}\n", + DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d }\n", __func__, vm, lvl + 1, start, end, idx, len, atomic_read(px_used(pd))); GEM_BUG_ON(!len || len >= atomic_read(px_used(pd))); @@ -992,7 +994,7 @@ static u64 __gen8_ppgtt_clear(struct i915_address_space * const vm, u64 *vaddr; count = gen8_pt_count(start, end); - DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d} removing pte\n", + DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d } removing pte\n", __func__, vm, lvl, start, end, gen8_pd_index(start, 0), count, atomic_read(&pt->used)); @@ -1020,6 +1022,7 @@ static void gen8_ppgtt_clear(struct i915_address_space *vm, { GEM_BUG_ON(!IS_ALIGNED(start, BIT_ULL(GEN8_PTE_SHIFT))); GEM_BUG_ON(!IS_ALIGNED(length, BIT_ULL(GEN8_PTE_SHIFT))); + GEM_BUG_ON(range_overflows(start, length, vm->total)); start >>= GEN8_PTE_SHIFT; length >>= GEN8_PTE_SHIFT; @@ -1031,15 +1034,17 @@ static void gen8_ppgtt_clear(struct i915_address_space *vm, static int __gen8_ppgtt_alloc(struct i915_address_space * const vm, struct i915_page_directory * const pd, - u64 * const start, u64 end, int lvl) + u64 * const start, const u64 end, int lvl) { const struct i915_page_scratch * const scratch = &vm->scratch[lvl]; struct i915_page_table *alloc = NULL; unsigned int idx, len; int ret = 0; + GEM_BUG_ON(end > vm->total >> GEN8_PTE_SHIFT); + len = gen8_pd_range(*start, end, lvl--, &idx); - DBG("%s(%p):{lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d}\n", + DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d }\n", __func__, vm, lvl + 1, *start, end, idx, len, atomic_read(px_used(pd))); GEM_BUG_ON(!len || (idx + len - 1) >> gen8_pd_shift(1)); @@ -1105,7 +1110,7 @@ static int __gen8_ppgtt_alloc(struct i915_address_space * const vm, } else { unsigned int count = gen8_pt_count(*start, end); - DBG("%s(%p):{lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d} inserting pte\n", + DBG("%s(%p):{ lvl:%d, start:%llx, end:%llx, idx:%d, len:%d, used:%d } inserting pte\n", __func__, vm, lvl, *start, end, gen8_pd_index(*start, 0), count, atomic_read(&pt->used)); @@ -1131,6 +1136,7 @@ static int gen8_ppgtt_alloc(struct i915_address_space *vm, GEM_BUG_ON(!IS_ALIGNED(start, BIT_ULL(GEN8_PTE_SHIFT))); GEM_BUG_ON(!IS_ALIGNED(length, BIT_ULL(GEN8_PTE_SHIFT))); + GEM_BUG_ON(range_overflows(start, length, vm->total)); start >>= GEN8_PTE_SHIFT; length >>= GEN8_PTE_SHIFT; |