drm/radeon: Add PASID manager for KFD (f4d6229b) · Commits · 戴 / test

drivers/gpu/drm/radeon/radeon_kfd.c

+31 −0

Original line number	Diff line number	Diff line
		@@ -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;