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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>
This commit is contained in:
Felix Kuehling 2017-08-25 21:30:18 -04:00 committed by Alex Deucher
parent 02208441cc
commit f4d6229b9d
1 changed files with 31 additions and 0 deletions
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31
drivers/gpu/drm/radeon/radeon_kfd.c
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@ -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;