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author | Dave Airlie <airlied@redhat.com> | 2009-09-23 06:56:27 (GMT) |
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committer | Dave Airlie <airlied@linux.ie> | 2009-09-25 03:08:18 (GMT) |
commit | 513bcb4655e68706594e45dfa1d4b181500110ba (patch) | |
tree | ed457db4cfb202015866a131ad4e742503728fad /drivers/gpu/drm/radeon/radeon.h | |
parent | 35e4b7af21d77933abda3d41d1672589eb6c960c (diff) | |
download | linux-fsl-qoriq-513bcb4655e68706594e45dfa1d4b181500110ba.tar.xz |
drm/radeon/kms: don't require up to 64k allocations. (v2)
This avoids needing to do a kmalloc > PAGE_SIZE for the main
indirect buffer chunk, it adds an accessor for all reads from
the chunk and caches a single page at a time for subsequent
reads.
changes since v1:
Use a two page pool which should be the most common case
a single packet spanning > PAGE_SIZE will be hit, but I'm
having trouble seeing anywhere we currently generate anything like that.
hopefully proper short page copying at end
added parser_error flag to set deep errors instead of having to test
every ib value fetch.
fixed bug in patch that went to list.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon.h')
-rw-r--r-- | drivers/gpu/drm/radeon/radeon.h | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index d5de53e..7e34e43 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -342,7 +342,7 @@ struct radeon_ib { unsigned long idx; uint64_t gpu_addr; struct radeon_fence *fence; - volatile uint32_t *ptr; + uint32_t *ptr; uint32_t length_dw; }; @@ -415,7 +415,12 @@ struct radeon_cs_reloc { struct radeon_cs_chunk { uint32_t chunk_id; uint32_t length_dw; + int kpage_idx[2]; + uint32_t *kpage[2]; uint32_t *kdata; + void __user *user_ptr; + int last_copied_page; + int last_page_index; }; struct radeon_cs_parser { @@ -438,8 +443,38 @@ struct radeon_cs_parser { struct radeon_ib *ib; void *track; unsigned family; + int parser_error; }; +extern int radeon_cs_update_pages(struct radeon_cs_parser *p, int pg_idx); +extern int radeon_cs_finish_pages(struct radeon_cs_parser *p); + + +static inline u32 radeon_get_ib_value(struct radeon_cs_parser *p, int idx) +{ + struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx]; + u32 pg_idx, pg_offset; + u32 idx_value = 0; + int new_page; + + pg_idx = (idx * 4) / PAGE_SIZE; + pg_offset = (idx * 4) % PAGE_SIZE; + + if (ibc->kpage_idx[0] == pg_idx) + return ibc->kpage[0][pg_offset/4]; + if (ibc->kpage_idx[1] == pg_idx) + return ibc->kpage[1][pg_offset/4]; + + new_page = radeon_cs_update_pages(p, pg_idx); + if (new_page < 0) { + p->parser_error = new_page; + return 0; + } + + idx_value = ibc->kpage[new_page][pg_offset/4]; + return idx_value; +} + struct radeon_cs_packet { unsigned idx; unsigned type; |