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drm/panfrost: Update io-pgtable API 

Convert to io-pgtable's bulk {map,unmap}_pages() APIs, to help the old
single-page interfaces eventually go away. Unmapping heap BOs still
wants to be done a page at a time, but everything else can get the full
benefit of the more efficient interface.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Alyssa Rosenzweig <alyssa@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/daef7f8c134d989c55636a5790d8c0fcaca1bae3.1661205687.git.robin.murphy@arm.com
This commit is contained in:
Robin Murphy 2022-08-22 23:01:27 +01:00 committed by Steven Price
parent e6545831a1
commit 3740b08179
1 changed files with 25 additions and 15 deletions
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40
drivers/gpu/drm/panfrost/panfrost_mmu.c
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@ -248,11 +248,15 @@ void panfrost_mmu_reset(struct panfrost_device *pfdev)
mmu_write(pfdev, MMU_INT_MASK, ~0);
}
static size_t get_pgsize(u64 addr, size_t size)
static size_t get_pgsize(u64 addr, size_t size, size_t *count)
{
if (addr & (SZ_2M - 1) || size < SZ_2M)
return SZ_4K;
size_t blk_offset = -addr % SZ_2M;
if (blk_offset || size < SZ_2M) {
*count = min_not_zero(blk_offset, size) / SZ_4K;
return SZ_4K;
}
*count = size / SZ_2M;
return SZ_2M;
}
@ -287,12 +291,16 @@ static int mmu_map_sg(struct panfrost_device *pfdev, struct panfrost_mmu *mmu,
dev_dbg(pfdev->dev, "map: as=%d, iova=%llx, paddr=%lx, len=%zx", mmu->as, iova, paddr, len);
while (len) {
size_t pgsize = get_pgsize(iova | paddr, len);
size_t pgcount, mapped = 0;
size_t pgsize = get_pgsize(iova | paddr, len, &pgcount);
ops->map(ops, iova, paddr, pgsize, prot, GFP_KERNEL);
iova += pgsize;
paddr += pgsize;
len -= pgsize;
ops->map_pages(ops, iova, paddr, pgsize, pgcount, prot,
GFP_KERNEL, &mapped);
/* Don't get stuck if things have gone wrong */
mapped = max(mapped, pgsize);
iova += mapped;
paddr += mapped;
len -= mapped;
}
}
@ -344,15 +352,17 @@ void panfrost_mmu_unmap(struct panfrost_gem_mapping *mapping)
mapping->mmu->as, iova, len);
while (unmapped_len < len) {
size_t unmapped_page;
size_t pgsize = get_pgsize(iova, len - unmapped_len);
size_t unmapped_page, pgcount;
size_t pgsize = get_pgsize(iova, len - unmapped_len, &pgcount);
if (ops->iova_to_phys(ops, iova)) {
unmapped_page = ops->unmap(ops, iova, pgsize, NULL);
WARN_ON(unmapped_page != pgsize);
if (bo->is_heap)
pgcount = 1;
if (!bo->is_heap || ops->iova_to_phys(ops, iova)) {
unmapped_page = ops->unmap_pages(ops, iova, pgsize, pgcount, NULL);
WARN_ON(unmapped_page != pgsize * pgcount);
}
iova += pgsize;
unmapped_len += pgsize;
iova += pgsize * pgcount;
unmapped_len += pgsize * pgcount;
}
panfrost_mmu_flush_range(pfdev, mapping->mmu,