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path: root/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c
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Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c543
1 files changed, 543 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c
new file mode 100644
index 000000000000..dfd1d503bccf
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c
@@ -0,0 +1,543 @@
+/*
+ * Copyright 2014 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include <linux/fdtable.h>
+#include <linux/uaccess.h>
+#include <linux/firmware.h>
+#include <drm/drmP.h>
+#include "amdgpu.h"
+#include "amdgpu_amdkfd.h"
+#include "amdgpu_ucode.h"
+#include "gca/gfx_8_0_sh_mask.h"
+#include "gca/gfx_8_0_d.h"
+#include "gca/gfx_8_0_enum.h"
+#include "oss/oss_3_0_sh_mask.h"
+#include "oss/oss_3_0_d.h"
+#include "gmc/gmc_8_1_sh_mask.h"
+#include "gmc/gmc_8_1_d.h"
+#include "vi_structs.h"
+#include "vid.h"
+
+#define VI_PIPE_PER_MEC (4)
+
+struct cik_sdma_rlc_registers;
+
+/*
+ * Register access functions
+ */
+
+static void kgd_program_sh_mem_settings(struct kgd_dev *kgd, uint32_t vmid,
+ uint32_t sh_mem_config,
+ uint32_t sh_mem_ape1_base, uint32_t sh_mem_ape1_limit,
+ uint32_t sh_mem_bases);
+static int kgd_set_pasid_vmid_mapping(struct kgd_dev *kgd, unsigned int pasid,
+ unsigned int vmid);
+static int kgd_init_pipeline(struct kgd_dev *kgd, uint32_t pipe_id,
+ uint32_t hpd_size, uint64_t hpd_gpu_addr);
+static int kgd_init_interrupts(struct kgd_dev *kgd, uint32_t pipe_id);
+static int kgd_hqd_load(struct kgd_dev *kgd, void *mqd, uint32_t pipe_id,
+ uint32_t queue_id, uint32_t __user *wptr);
+static int kgd_hqd_sdma_load(struct kgd_dev *kgd, void *mqd);
+static bool kgd_hqd_is_occupied(struct kgd_dev *kgd, uint64_t queue_address,
+ uint32_t pipe_id, uint32_t queue_id);
+static bool kgd_hqd_sdma_is_occupied(struct kgd_dev *kgd, void *mqd);
+static int kgd_hqd_destroy(struct kgd_dev *kgd, uint32_t reset_type,
+ unsigned int timeout, uint32_t pipe_id,
+ uint32_t queue_id);
+static int kgd_hqd_sdma_destroy(struct kgd_dev *kgd, void *mqd,
+ unsigned int timeout);
+static void write_vmid_invalidate_request(struct kgd_dev *kgd, uint8_t vmid);
+static int kgd_address_watch_disable(struct kgd_dev *kgd);
+static int kgd_address_watch_execute(struct kgd_dev *kgd,
+ unsigned int watch_point_id,
+ uint32_t cntl_val,
+ uint32_t addr_hi,
+ uint32_t addr_lo);
+static int kgd_wave_control_execute(struct kgd_dev *kgd,
+ uint32_t gfx_index_val,
+ uint32_t sq_cmd);
+static uint32_t kgd_address_watch_get_offset(struct kgd_dev *kgd,
+ unsigned int watch_point_id,
+ unsigned int reg_offset);
+
+static bool get_atc_vmid_pasid_mapping_valid(struct kgd_dev *kgd,
+ uint8_t vmid);
+static uint16_t get_atc_vmid_pasid_mapping_pasid(struct kgd_dev *kgd,
+ uint8_t vmid);
+static void write_vmid_invalidate_request(struct kgd_dev *kgd, uint8_t vmid);
+static uint16_t get_fw_version(struct kgd_dev *kgd, enum kgd_engine_type type);
+
+static const struct kfd2kgd_calls kfd2kgd = {
+ .init_gtt_mem_allocation = alloc_gtt_mem,
+ .free_gtt_mem = free_gtt_mem,
+ .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,
+ .program_sh_mem_settings = kgd_program_sh_mem_settings,
+ .set_pasid_vmid_mapping = kgd_set_pasid_vmid_mapping,
+ .init_pipeline = kgd_init_pipeline,
+ .init_interrupts = kgd_init_interrupts,
+ .hqd_load = kgd_hqd_load,
+ .hqd_sdma_load = kgd_hqd_sdma_load,
+ .hqd_is_occupied = kgd_hqd_is_occupied,
+ .hqd_sdma_is_occupied = kgd_hqd_sdma_is_occupied,
+ .hqd_destroy = kgd_hqd_destroy,
+ .hqd_sdma_destroy = kgd_hqd_sdma_destroy,
+ .address_watch_disable = kgd_address_watch_disable,
+ .address_watch_execute = kgd_address_watch_execute,
+ .wave_control_execute = kgd_wave_control_execute,
+ .address_watch_get_offset = kgd_address_watch_get_offset,
+ .get_atc_vmid_pasid_mapping_pasid =
+ get_atc_vmid_pasid_mapping_pasid,
+ .get_atc_vmid_pasid_mapping_valid =
+ get_atc_vmid_pasid_mapping_valid,
+ .write_vmid_invalidate_request = write_vmid_invalidate_request,
+ .get_fw_version = get_fw_version
+};
+
+struct kfd2kgd_calls *amdgpu_amdkfd_gfx_8_0_get_functions()
+{
+ return (struct kfd2kgd_calls *)&kfd2kgd;
+}
+
+static inline struct amdgpu_device *get_amdgpu_device(struct kgd_dev *kgd)
+{
+ return (struct amdgpu_device *)kgd;
+}
+
+static void lock_srbm(struct kgd_dev *kgd, uint32_t mec, uint32_t pipe,
+ uint32_t queue, uint32_t vmid)
+{
+ struct amdgpu_device *adev = get_amdgpu_device(kgd);
+ uint32_t value = PIPEID(pipe) | MEID(mec) | VMID(vmid) | QUEUEID(queue);
+
+ mutex_lock(&adev->srbm_mutex);
+ WREG32(mmSRBM_GFX_CNTL, value);
+}
+
+static void unlock_srbm(struct kgd_dev *kgd)
+{
+ struct amdgpu_device *adev = get_amdgpu_device(kgd);
+
+ WREG32(mmSRBM_GFX_CNTL, 0);
+ mutex_unlock(&adev->srbm_mutex);
+}
+
+static void acquire_queue(struct kgd_dev *kgd, uint32_t pipe_id,
+ uint32_t queue_id)
+{
+ uint32_t mec = (++pipe_id / VI_PIPE_PER_MEC) + 1;
+ uint32_t pipe = (pipe_id % VI_PIPE_PER_MEC);
+
+ lock_srbm(kgd, mec, pipe, queue_id, 0);
+}
+
+static void release_queue(struct kgd_dev *kgd)
+{
+ unlock_srbm(kgd);
+}
+
+static void kgd_program_sh_mem_settings(struct kgd_dev *kgd, uint32_t vmid,
+ uint32_t sh_mem_config,
+ uint32_t sh_mem_ape1_base,
+ uint32_t sh_mem_ape1_limit,
+ uint32_t sh_mem_bases)
+{
+ struct amdgpu_device *adev = get_amdgpu_device(kgd);
+
+ lock_srbm(kgd, 0, 0, 0, vmid);
+
+ WREG32(mmSH_MEM_CONFIG, sh_mem_config);
+ WREG32(mmSH_MEM_APE1_BASE, sh_mem_ape1_base);
+ WREG32(mmSH_MEM_APE1_LIMIT, sh_mem_ape1_limit);
+ WREG32(mmSH_MEM_BASES, sh_mem_bases);
+
+ unlock_srbm(kgd);
+}
+
+static int kgd_set_pasid_vmid_mapping(struct kgd_dev *kgd, unsigned int pasid,
+ unsigned int vmid)
+{
+ struct amdgpu_device *adev = get_amdgpu_device(kgd);
+
+ /*
+ * We have to assume that there is no outstanding mapping.
+ * The ATC_VMID_PASID_MAPPING_UPDATE_STATUS bit could be 0 because
+ * a mapping is in progress or because a mapping finished
+ * and the SW cleared it.
+ * So the protocol is to always wait & clear.
+ */
+ uint32_t pasid_mapping = (pasid == 0) ? 0 : (uint32_t)pasid |
+ ATC_VMID0_PASID_MAPPING__VALID_MASK;
+
+ WREG32(mmATC_VMID0_PASID_MAPPING + vmid, pasid_mapping);
+
+ while (!(RREG32(mmATC_VMID_PASID_MAPPING_UPDATE_STATUS) & (1U << vmid)))
+ cpu_relax();
+ WREG32(mmATC_VMID_PASID_MAPPING_UPDATE_STATUS, 1U << vmid);
+
+ /* Mapping vmid to pasid also for IH block */
+ WREG32(mmIH_VMID_0_LUT + vmid, pasid_mapping);
+
+ return 0;
+}
+
+static int kgd_init_pipeline(struct kgd_dev *kgd, uint32_t pipe_id,
+ uint32_t hpd_size, uint64_t hpd_gpu_addr)
+{
+ return 0;
+}
+
+static int kgd_init_interrupts(struct kgd_dev *kgd, uint32_t pipe_id)
+{
+ struct amdgpu_device *adev = get_amdgpu_device(kgd);
+ uint32_t mec;
+ uint32_t pipe;
+
+ mec = (++pipe_id / VI_PIPE_PER_MEC) + 1;
+ pipe = (pipe_id % VI_PIPE_PER_MEC);
+
+ lock_srbm(kgd, mec, pipe, 0, 0);
+
+ WREG32(mmCPC_INT_CNTL, CP_INT_CNTL_RING0__TIME_STAMP_INT_ENABLE_MASK);
+
+ unlock_srbm(kgd);
+
+ return 0;
+}
+
+static inline uint32_t get_sdma_base_addr(struct cik_sdma_rlc_registers *m)
+{
+ return 0;
+}
+
+static inline struct vi_mqd *get_mqd(void *mqd)
+{
+ return (struct vi_mqd *)mqd;
+}
+
+static inline struct cik_sdma_rlc_registers *get_sdma_mqd(void *mqd)
+{
+ return (struct cik_sdma_rlc_registers *)mqd;
+}
+
+static int kgd_hqd_load(struct kgd_dev *kgd, void *mqd, uint32_t pipe_id,
+ uint32_t queue_id, uint32_t __user *wptr)
+{
+ struct vi_mqd *m;
+ uint32_t shadow_wptr, valid_wptr;
+ struct amdgpu_device *adev = get_amdgpu_device(kgd);
+
+ m = get_mqd(mqd);
+
+ valid_wptr = copy_from_user(&shadow_wptr, wptr, sizeof(shadow_wptr));
+ acquire_queue(kgd, pipe_id, queue_id);
+
+ WREG32(mmCP_MQD_CONTROL, m->cp_mqd_control);
+ WREG32(mmCP_MQD_BASE_ADDR, m->cp_mqd_base_addr_lo);
+ WREG32(mmCP_MQD_BASE_ADDR_HI, m->cp_mqd_base_addr_hi);
+
+ WREG32(mmCP_HQD_VMID, m->cp_hqd_vmid);
+ WREG32(mmCP_HQD_PERSISTENT_STATE, m->cp_hqd_persistent_state);
+ WREG32(mmCP_HQD_PIPE_PRIORITY, m->cp_hqd_pipe_priority);
+ WREG32(mmCP_HQD_QUEUE_PRIORITY, m->cp_hqd_queue_priority);
+ WREG32(mmCP_HQD_QUANTUM, m->cp_hqd_quantum);
+ WREG32(mmCP_HQD_PQ_BASE, m->cp_hqd_pq_base_lo);
+ WREG32(mmCP_HQD_PQ_BASE_HI, m->cp_hqd_pq_base_hi);
+ WREG32(mmCP_HQD_PQ_RPTR_REPORT_ADDR, m->cp_hqd_pq_rptr_report_addr_lo);
+ WREG32(mmCP_HQD_PQ_RPTR_REPORT_ADDR_HI,
+ m->cp_hqd_pq_rptr_report_addr_hi);
+
+ if (valid_wptr > 0)
+ WREG32(mmCP_HQD_PQ_WPTR, shadow_wptr);
+
+ WREG32(mmCP_HQD_PQ_CONTROL, m->cp_hqd_pq_control);
+ WREG32(mmCP_HQD_PQ_DOORBELL_CONTROL, m->cp_hqd_pq_doorbell_control);
+
+ WREG32(mmCP_HQD_EOP_BASE_ADDR, m->cp_hqd_eop_base_addr_lo);
+ WREG32(mmCP_HQD_EOP_BASE_ADDR_HI, m->cp_hqd_eop_base_addr_hi);
+ WREG32(mmCP_HQD_EOP_CONTROL, m->cp_hqd_eop_control);
+ WREG32(mmCP_HQD_EOP_RPTR, m->cp_hqd_eop_rptr);
+ WREG32(mmCP_HQD_EOP_WPTR, m->cp_hqd_eop_wptr);
+ WREG32(mmCP_HQD_EOP_EVENTS, m->cp_hqd_eop_done_events);
+
+ WREG32(mmCP_HQD_CTX_SAVE_BASE_ADDR_LO, m->cp_hqd_ctx_save_base_addr_lo);
+ WREG32(mmCP_HQD_CTX_SAVE_BASE_ADDR_HI, m->cp_hqd_ctx_save_base_addr_hi);
+ WREG32(mmCP_HQD_CTX_SAVE_CONTROL, m->cp_hqd_ctx_save_control);
+ WREG32(mmCP_HQD_CNTL_STACK_OFFSET, m->cp_hqd_cntl_stack_offset);
+ WREG32(mmCP_HQD_CNTL_STACK_SIZE, m->cp_hqd_cntl_stack_size);
+ WREG32(mmCP_HQD_WG_STATE_OFFSET, m->cp_hqd_wg_state_offset);
+ WREG32(mmCP_HQD_CTX_SAVE_SIZE, m->cp_hqd_ctx_save_size);
+
+ WREG32(mmCP_HQD_IB_CONTROL, m->cp_hqd_ib_control);
+
+ WREG32(mmCP_HQD_DEQUEUE_REQUEST, m->cp_hqd_dequeue_request);
+ WREG32(mmCP_HQD_ERROR, m->cp_hqd_error);
+ WREG32(mmCP_HQD_EOP_WPTR_MEM, m->cp_hqd_eop_wptr_mem);
+ WREG32(mmCP_HQD_EOP_DONES, m->cp_hqd_eop_dones);
+
+ WREG32(mmCP_HQD_ACTIVE, m->cp_hqd_active);
+
+ release_queue(kgd);
+
+ return 0;
+}
+
+static int kgd_hqd_sdma_load(struct kgd_dev *kgd, void *mqd)
+{
+ return 0;
+}
+
+static bool kgd_hqd_is_occupied(struct kgd_dev *kgd, uint64_t queue_address,
+ uint32_t pipe_id, uint32_t queue_id)
+{
+ struct amdgpu_device *adev = get_amdgpu_device(kgd);
+ uint32_t act;
+ bool retval = false;
+ uint32_t low, high;
+
+ acquire_queue(kgd, pipe_id, queue_id);
+ act = RREG32(mmCP_HQD_ACTIVE);
+ if (act) {
+ low = lower_32_bits(queue_address >> 8);
+ high = upper_32_bits(queue_address >> 8);
+
+ if (low == RREG32(mmCP_HQD_PQ_BASE) &&
+ high == RREG32(mmCP_HQD_PQ_BASE_HI))
+ retval = true;
+ }
+ release_queue(kgd);
+ return retval;
+}
+
+static bool kgd_hqd_sdma_is_occupied(struct kgd_dev *kgd, void *mqd)
+{
+ struct amdgpu_device *adev = get_amdgpu_device(kgd);
+ struct cik_sdma_rlc_registers *m;
+ uint32_t sdma_base_addr;
+ uint32_t sdma_rlc_rb_cntl;
+
+ m = get_sdma_mqd(mqd);
+ sdma_base_addr = get_sdma_base_addr(m);
+
+ sdma_rlc_rb_cntl = RREG32(sdma_base_addr + mmSDMA0_RLC0_RB_CNTL);
+
+ if (sdma_rlc_rb_cntl & SDMA0_RLC0_RB_CNTL__RB_ENABLE_MASK)
+ return true;
+
+ return false;
+}
+
+static int kgd_hqd_destroy(struct kgd_dev *kgd, uint32_t reset_type,
+ unsigned int timeout, uint32_t pipe_id,
+ uint32_t queue_id)
+{
+ struct amdgpu_device *adev = get_amdgpu_device(kgd);
+ uint32_t temp;
+
+ acquire_queue(kgd, pipe_id, queue_id);
+
+ WREG32(mmCP_HQD_DEQUEUE_REQUEST, reset_type);
+
+ while (true) {
+ temp = RREG32(mmCP_HQD_ACTIVE);
+ if (temp & CP_HQD_ACTIVE__ACTIVE_MASK)
+ break;
+ if (timeout == 0) {
+ pr_err("kfd: cp queue preemption time out (%dms)\n",
+ temp);
+ release_queue(kgd);
+ return -ETIME;
+ }
+ msleep(20);
+ timeout -= 20;
+ }
+
+ release_queue(kgd);
+ return 0;
+}
+
+static int kgd_hqd_sdma_destroy(struct kgd_dev *kgd, void *mqd,
+ unsigned int timeout)
+{
+ struct amdgpu_device *adev = get_amdgpu_device(kgd);
+ struct cik_sdma_rlc_registers *m;
+ uint32_t sdma_base_addr;
+ uint32_t temp;
+
+ m = get_sdma_mqd(mqd);
+ sdma_base_addr = get_sdma_base_addr(m);
+
+ temp = RREG32(sdma_base_addr + mmSDMA0_RLC0_RB_CNTL);
+ temp = temp & ~SDMA0_RLC0_RB_CNTL__RB_ENABLE_MASK;
+ WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_CNTL, temp);
+
+ while (true) {
+ temp = RREG32(sdma_base_addr + mmSDMA0_RLC0_CONTEXT_STATUS);
+ if (temp & SDMA0_STATUS_REG__RB_CMD_IDLE__SHIFT)
+ break;
+ if (timeout == 0)
+ return -ETIME;
+ msleep(20);
+ timeout -= 20;
+ }
+
+ WREG32(sdma_base_addr + mmSDMA0_RLC0_DOORBELL, 0);
+ WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_RPTR, 0);
+ WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_WPTR, 0);
+ WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_BASE, 0);
+
+ return 0;
+}
+
+static bool get_atc_vmid_pasid_mapping_valid(struct kgd_dev *kgd,
+ uint8_t vmid)
+{
+ uint32_t reg;
+ struct amdgpu_device *adev = (struct amdgpu_device *) kgd;
+
+ reg = RREG32(mmATC_VMID0_PASID_MAPPING + vmid);
+ return reg & ATC_VMID0_PASID_MAPPING__VALID_MASK;
+}
+
+static uint16_t get_atc_vmid_pasid_mapping_pasid(struct kgd_dev *kgd,
+ uint8_t vmid)
+{
+ uint32_t reg;
+ struct amdgpu_device *adev = (struct amdgpu_device *) kgd;
+
+ reg = RREG32(mmATC_VMID0_PASID_MAPPING + vmid);
+ return reg & ATC_VMID0_PASID_MAPPING__VALID_MASK;
+}
+
+static void write_vmid_invalidate_request(struct kgd_dev *kgd, uint8_t vmid)
+{
+ struct amdgpu_device *adev = (struct amdgpu_device *) kgd;
+
+ WREG32(mmVM_INVALIDATE_REQUEST, 1 << vmid);
+}
+
+static int kgd_address_watch_disable(struct kgd_dev *kgd)
+{
+ return 0;
+}
+
+static int kgd_address_watch_execute(struct kgd_dev *kgd,
+ unsigned int watch_point_id,
+ uint32_t cntl_val,
+ uint32_t addr_hi,
+ uint32_t addr_lo)
+{
+ return 0;
+}
+
+static int kgd_wave_control_execute(struct kgd_dev *kgd,
+ uint32_t gfx_index_val,
+ uint32_t sq_cmd)
+{
+ struct amdgpu_device *adev = get_amdgpu_device(kgd);
+ uint32_t data = 0;
+
+ mutex_lock(&adev->grbm_idx_mutex);
+
+ WREG32(mmGRBM_GFX_INDEX, gfx_index_val);
+ WREG32(mmSQ_CMD, sq_cmd);
+
+ data = REG_SET_FIELD(data, GRBM_GFX_INDEX,
+ INSTANCE_BROADCAST_WRITES, 1);
+ data = REG_SET_FIELD(data, GRBM_GFX_INDEX,
+ SH_BROADCAST_WRITES, 1);
+ data = REG_SET_FIELD(data, GRBM_GFX_INDEX,
+ SE_BROADCAST_WRITES, 1);
+
+ WREG32(mmGRBM_GFX_INDEX, data);
+ mutex_unlock(&adev->grbm_idx_mutex);
+
+ return 0;
+}
+
+static uint32_t kgd_address_watch_get_offset(struct kgd_dev *kgd,
+ unsigned int watch_point_id,
+ unsigned int reg_offset)
+{
+ return 0;
+}
+
+static uint16_t get_fw_version(struct kgd_dev *kgd, enum kgd_engine_type type)
+{
+ struct amdgpu_device *adev = (struct amdgpu_device *) kgd;
+ const union amdgpu_firmware_header *hdr;
+
+ BUG_ON(kgd == NULL);
+
+ switch (type) {
+ case KGD_ENGINE_PFP:
+ hdr = (const union amdgpu_firmware_header *)
+ adev->gfx.pfp_fw->data;
+ break;
+
+ case KGD_ENGINE_ME:
+ hdr = (const union amdgpu_firmware_header *)
+ adev->gfx.me_fw->data;
+ break;
+
+ case KGD_ENGINE_CE:
+ hdr = (const union amdgpu_firmware_header *)
+ adev->gfx.ce_fw->data;
+ break;
+
+ case KGD_ENGINE_MEC1:
+ hdr = (const union amdgpu_firmware_header *)
+ adev->gfx.mec_fw->data;
+ break;
+
+ case KGD_ENGINE_MEC2:
+ hdr = (const union amdgpu_firmware_header *)
+ adev->gfx.mec2_fw->data;
+ break;
+
+ case KGD_ENGINE_RLC:
+ hdr = (const union amdgpu_firmware_header *)
+ adev->gfx.rlc_fw->data;
+ break;
+
+ case KGD_ENGINE_SDMA1:
+ hdr = (const union amdgpu_firmware_header *)
+ adev->sdma[0].fw->data;
+ break;
+
+ case KGD_ENGINE_SDMA2:
+ hdr = (const union amdgpu_firmware_header *)
+ adev->sdma[1].fw->data;
+ break;
+
+ default:
+ return 0;
+ }
+
+ if (hdr == NULL)
+ return 0;
+
+ /* Only 12 bit in use*/
+ return hdr->common.ucode_version;
+}