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| author | Alex Deucher <alexander.deucher@amd.com> | 2013-03-04 12:47:46 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2013-06-27 10:49:07 -0400 |
| commit | 75efdee11b5da3acbbeb43a9b93a9c4fe6d5bec8 (patch) | |
| tree | dfdb40d6b02d6a613a5d20ae8a343ac0d024dfcc /drivers/gpu/drm/radeon/radeon.h | |
| parent | f93bdefe6269067afc85688d45c646cde350e0d8 (diff) | |
| download | lwn-75efdee11b5da3acbbeb43a9b93a9c4fe6d5bec8.tar.gz lwn-75efdee11b5da3acbbeb43a9b93a9c4fe6d5bec8.zip | |
drm/radeon: implement simple doorbell page allocator
The doorbell aperture is a PCI BAR whose pages can be
mapped to compute resources for things like wptrs
for userspace queues.
This patch maps the BAR and sets up a simple allocator
to allocate pages from the BAR.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon.h')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 064a57923465..a74d985ef4ee 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -556,6 +556,20 @@ struct radeon_scratch { int radeon_scratch_get(struct radeon_device *rdev, uint32_t *reg); void radeon_scratch_free(struct radeon_device *rdev, uint32_t reg); +/* + * GPU doorbell structures, functions & helpers + */ +struct radeon_doorbell { + u32 num_pages; + bool free[1024]; + /* doorbell mmio */ + resource_size_t base; + resource_size_t size; + void __iomem *ptr; +}; + +int radeon_doorbell_get(struct radeon_device *rdev, u32 *page); +void radeon_doorbell_free(struct radeon_device *rdev, u32 doorbell); /* * IRQS. @@ -1710,6 +1724,7 @@ struct radeon_device { struct radeon_gart gart; struct radeon_mode_info mode_info; struct radeon_scratch scratch; + struct radeon_doorbell doorbell; struct radeon_mman mman; struct radeon_fence_driver fence_drv[RADEON_NUM_RINGS]; wait_queue_head_t fence_queue; @@ -1783,6 +1798,9 @@ void r100_mm_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v, u32 r100_io_rreg(struct radeon_device *rdev, u32 reg); void r100_io_wreg(struct radeon_device *rdev, u32 reg, u32 v); +u32 cik_mm_rdoorbell(struct radeon_device *rdev, u32 offset); +void cik_mm_wdoorbell(struct radeon_device *rdev, u32 offset, u32 v); + /* * Cast helper */ @@ -1832,6 +1850,9 @@ void r100_io_wreg(struct radeon_device *rdev, u32 reg, u32 v); #define RREG32_IO(reg) r100_io_rreg(rdev, (reg)) #define WREG32_IO(reg, v) r100_io_wreg(rdev, (reg), (v)) +#define RDOORBELL32(offset) cik_mm_rdoorbell(rdev, (offset)) +#define WDOORBELL32(offset, v) cik_mm_wdoorbell(rdev, (offset), (v)) + /* * Indirect registers accessor */ |