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| author |   Felix Kuehling <Felix.Kuehling@amd.com> | 2017-08-25 21:30:18 -0400 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2017-09-26 13:07:02 -0400 |
| commit | f4d6229b9db66c6d8fcd5157b4bcc701c099e3e2 (patch) | |
| tree | 59359ac64fc3dda7e72654c1618fd82bbad1fea0 /drivers/gpu/drm/radeon | |
| parent | drm/amdgpu: Add PASID management (diff) | |
| download | linux-dev-f4d6229b9db66c6d8fcd5157b4bcc701c099e3e2.tar.xz linux-dev-f4d6229b9db66c6d8fcd5157b4bcc701c099e3e2.zip | |
drm/radeon: Add PASID manager for KFD
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_kfd.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_kfd.c b/drivers/gpu/drm/radeon/radeon_kfd.c index f6578c96925c..a2ac8ac0930d 100644 --- a/drivers/gpu/drm/radeon/radeon_kfd.c +++ b/drivers/gpu/drm/radeon/radeon_kfd.c @@ -58,6 +58,10 @@ static uint64_t get_vmem_size(struct kgd_dev *kgd); static uint64_t get_gpu_clock_counter(struct kgd_dev *kgd); static uint32_t get_max_engine_clock_in_mhz(struct kgd_dev *kgd); + +static int alloc_pasid(unsigned int bits); +static void free_pasid(unsigned int pasid); + static uint16_t get_fw_version(struct kgd_dev *kgd, enum kgd_engine_type type); /* @@ -112,6 +116,8 @@ static const struct kfd2kgd_calls kfd2kgd = { .get_vmem_size = get_vmem_size, .get_gpu_clock_counter = get_gpu_clock_counter, .get_max_engine_clock_in_mhz = get_max_engine_clock_in_mhz, + .alloc_pasid = alloc_pasid, + .free_pasid = free_pasid, .program_sh_mem_settings = kgd_program_sh_mem_settings, .set_pasid_vmid_mapping = kgd_set_pasid_vmid_mapping, .init_pipeline = kgd_init_pipeline, @@ -341,6 +347,31 @@ static uint32_t get_max_engine_clock_in_mhz(struct kgd_dev *kgd) return rdev->pm.dpm.dyn_state.max_clock_voltage_on_ac.sclk / 100; } +/* + * PASID manager + */ +static DEFINE_IDA(pasid_ida); + +int alloc_pasid(unsigned int bits) +{ + int pasid = -EINVAL; + + for (bits = min(bits, 31U); bits > 0; bits--) { + pasid = ida_simple_get(&pasid_ida, + 1U << (bits - 1), 1U << bits, + GFP_KERNEL); + if (pasid != -ENOSPC) + break; + } + + return pasid; +} + +void free_pasid(unsigned int pasid) +{ + ida_simple_remove(&pasid_ida, pasid); +} + static inline struct radeon_device *get_radeon_device(struct kgd_dev *kgd) { return (struct radeon_device *)kgd; |