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drm/i915/: Re-work clflush_write32 

Use drm_clflush_virt_range instead of clflushopt and remove the memory
barrier, since drm_clflush_virt_range takes care of that.

v2(Michael Cheng): Use sizeof(*addr) instead of sizeof(addr) to get the
		   actual size of the page. Thanks to Matt Roper for
		   pointing this out.

Signed-off-by: Michael Cheng <michael.cheng@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220321223819.72833-5-michael.cheng@intel.com
This commit is contained in:
Michael Cheng 2022-03-21 15:38:18 -07:00 committed by Matt Roper
parent 92b0cba49e
commit 89754df82f
1 changed files with 3 additions and 5 deletions
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8
drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
View File

@ -1322,10 +1322,8 @@ static void *reloc_vaddr(struct i915_vma *vma,
static void clflush_write32(u32 *addr, u32 value, unsigned int flushes)
{
if (unlikely(flushes & (CLFLUSH_BEFORE | CLFLUSH_AFTER))) {
if (flushes & CLFLUSH_BEFORE) {
clflushopt(addr);
mb();
}
if (flushes & CLFLUSH_BEFORE)
drm_clflush_virt_range(addr, sizeof(*addr));
*addr = value;
@ -1337,7 +1335,7 @@ static void clflush_write32(u32 *addr, u32 value, unsigned int flushes)
* to ensure ordering of clflush wrt to the system.
*/
if (flushes & CLFLUSH_AFTER)
clflushopt(addr);
drm_clflush_virt_range(addr, sizeof(*addr));
} else
*addr = value;
}