A few reasons to drop kmap:
- For native objects all we do is look at obj->vaddr anyway, so might
as well not call functions for every page.
- Reloc-processing on dma-buf is ... questionable.
- Plus most dma-buf that bother kernel cpu mmaps give you at least
vmap, much less kmaps. And all the ones relevant for arm-soc are
again doing a obj->vaddr game anyway, there's no real kmap going on
on arm it seems.
Plus this seems to be the only real in-tree user of dma_buf_kmap, and
I'd like to get rid of that.
Signed-off-by: Daniel Vetter <daniel.vet...@intel.com>
Cc: Thierry Reding <thierry.red...@gmail.com>
Cc: linux-te...@vger.kernel.org
---
drivers/gpu/host1x/job.c | 21 +++++++--------------
1 file changed, 7 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c
index 25ca54de8fc5..60b2fedd0061 100644
--- a/drivers/gpu/host1x/job.c
+++ b/drivers/gpu/host1x/job.c
@@ -244,8 +244,7 @@ static unsigned int pin_job(struct host1x *host, struct
host1x_job *job)
static int do_relocs(struct host1x_job *job, struct host1x_job_gather *g)
{
- u32 last_page = ~0;
- void *cmdbuf_page_addr = NULL;
+ void *cmdbuf_addr = NULL;
struct host1x_bo *cmdbuf = g->bo;
unsigned int i;
@@ -267,28 +266,22 @@ static int do_relocs(struct host1x_job *job, struct
host1x_job_gather *g)
goto patch_reloc;
}
- if (last_page != reloc->cmdbuf.offset >> PAGE_SHIFT) {
- if (cmdbuf_page_addr)
- host1x_bo_kunmap(cmdbuf, last_page,
- cmdbuf_page_addr);
+ if (!cmdbuf_addr) {
+ cmdbuf_addr = host1x_bo_mmap(cmdbuf);
- cmdbuf_page_addr = host1x_bo_kmap(cmdbuf,
- reloc->cmdbuf.offset >> PAGE_SHIFT);
- last_page = reloc->cmdbuf.offset >> PAGE_SHIFT;
-
- if (unlikely(!cmdbuf_page_addr)) {
+ if (unlikely(!cmdbuf_addr)) {
pr_err("Could not map cmdbuf for relocation\n");
return -ENOMEM;
}
}
- target = cmdbuf_page_addr + (reloc->cmdbuf.offset & ~PAGE_MASK);
+ target = cmdbuf_addr + reloc->cmdbuf.offset;
patch_reloc:
*target = reloc_addr;
}
- if (cmdbuf_page_addr)
- host1x_bo_kunmap(cmdbuf, last_page, cmdbuf_page_addr);
+ if (cmdbuf_addr)
+ host1x_bo_munmap(cmdbuf, cmdbuf_addr);
return 0;
}
--
2.24.0
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