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drm/msm: support multiple address spaces

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We can have various combinations of 64b and 32b address space, ie. 64b
CPU but 32b display and gpu, or 64b CPU and GPU but 32b display.  So
best to decouple the device iova's from mmap offset.

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark
2016-09-28 19:58:32 -04:00
parent 394da4b8f3
commit 667ce33e57
16 changed files with 208 additions and 80 deletions
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19
drivers/gpu/drm/msm/msm_gem.h
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@@ -24,6 +24,20 @@
/* Additional internal-use only BO flags: */
#define MSM_BO_STOLEN 0x10000000 /* try to use stolen/splash memory */
struct msm_gem_address_space {
const char *name;
/* NOTE: mm managed at the page level, size is in # of pages
* and position mm_node->start is in # of pages:
*/
struct drm_mm mm;
struct msm_mmu *mmu;
};
struct msm_gem_vma {
struct drm_mm_node node;
uint64_t iova;
};
struct msm_gem_object {
struct drm_gem_object base;
@@ -61,10 +75,7 @@ struct msm_gem_object {
struct sg_table *sgt;
void *vaddr;
struct {
// XXX
uint32_t iova;
} domain[NUM_DOMAINS];
struct msm_gem_vma domain[NUM_DOMAINS];
/* normally (resv == &_resv) except for imported bo's */
struct reservation_object *resv;