2 * Copyright 2018 Advanced Micro Devices, Inc.
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11 * the following conditions:
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21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
27 #include <linux/io-64-nonatomic-lo-hi.h>
30 #include "amdgpu_gmc.h"
31 #include "amdgpu_ras.h"
32 #include "amdgpu_xgmi.h"
35 * amdgpu_gmc_pdb0_alloc - allocate vram for pdb0
37 * @adev: amdgpu_device pointer
39 * Allocate video memory for pdb0 and map it for CPU access
40 * Returns 0 for success, error for failure.
42 int amdgpu_gmc_pdb0_alloc(struct amdgpu_device *adev)
45 struct amdgpu_bo_param bp;
46 u64 vram_size = adev->gmc.xgmi.node_segment_size * adev->gmc.xgmi.num_physical_nodes;
47 uint32_t pde0_page_shift = adev->gmc.vmid0_page_table_block_size + 21;
48 uint32_t npdes = (vram_size + (1ULL << pde0_page_shift) -1) >> pde0_page_shift;
50 memset(&bp, 0, sizeof(bp));
51 bp.size = PAGE_ALIGN((npdes + 1) * 8);
52 bp.byte_align = PAGE_SIZE;
53 bp.domain = AMDGPU_GEM_DOMAIN_VRAM;
54 bp.flags = AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
55 AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
56 bp.type = ttm_bo_type_kernel;
58 bp.bo_ptr_size = sizeof(struct amdgpu_bo);
60 r = amdgpu_bo_create(adev, &bp, &adev->gmc.pdb0_bo);
64 r = amdgpu_bo_reserve(adev->gmc.pdb0_bo, false);
66 goto bo_reserve_failure;
68 r = amdgpu_bo_pin(adev->gmc.pdb0_bo, AMDGPU_GEM_DOMAIN_VRAM);
71 r = amdgpu_bo_kmap(adev->gmc.pdb0_bo, &adev->gmc.ptr_pdb0);
75 amdgpu_bo_unreserve(adev->gmc.pdb0_bo);
79 amdgpu_bo_unpin(adev->gmc.pdb0_bo);
81 amdgpu_bo_unreserve(adev->gmc.pdb0_bo);
83 amdgpu_bo_unref(&adev->gmc.pdb0_bo);
88 * amdgpu_gmc_get_pde_for_bo - get the PDE for a BO
90 * @bo: the BO to get the PDE for
91 * @level: the level in the PD hirarchy
92 * @addr: resulting addr
93 * @flags: resulting flags
95 * Get the address and flags to be used for a PDE (Page Directory Entry).
97 void amdgpu_gmc_get_pde_for_bo(struct amdgpu_bo *bo, int level,
98 uint64_t *addr, uint64_t *flags)
100 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
102 switch (bo->tbo.mem.mem_type) {
104 *addr = bo->tbo.ttm->dma_address[0];
107 *addr = amdgpu_bo_gpu_offset(bo);
113 *flags = amdgpu_ttm_tt_pde_flags(bo->tbo.ttm, &bo->tbo.mem);
114 amdgpu_gmc_get_vm_pde(adev, level, addr, flags);
118 * amdgpu_gmc_pd_addr - return the address of the root directory
120 uint64_t amdgpu_gmc_pd_addr(struct amdgpu_bo *bo)
122 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
125 /* TODO: move that into ASIC specific code */
126 if (adev->asic_type >= CHIP_VEGA10) {
127 uint64_t flags = AMDGPU_PTE_VALID;
129 amdgpu_gmc_get_pde_for_bo(bo, -1, &pd_addr, &flags);
132 pd_addr = amdgpu_bo_gpu_offset(bo);
138 * amdgpu_gmc_set_pte_pde - update the page tables using CPU
140 * @adev: amdgpu_device pointer
141 * @cpu_pt_addr: cpu address of the page table
142 * @gpu_page_idx: entry in the page table to update
143 * @addr: dst addr to write into pte/pde
144 * @flags: access flags
146 * Update the page tables using CPU.
148 int amdgpu_gmc_set_pte_pde(struct amdgpu_device *adev, void *cpu_pt_addr,
149 uint32_t gpu_page_idx, uint64_t addr,
152 void __iomem *ptr = (void *)cpu_pt_addr;
156 * The following is for PTE only. GART does not have PDEs.
158 value = addr & 0x0000FFFFFFFFF000ULL;
160 writeq(value, ptr + (gpu_page_idx * 8));
165 * amdgpu_gmc_agp_addr - return the address in the AGP address space
167 * @bo: TTM BO which needs the address, must be in GTT domain
169 * Tries to figure out how to access the BO through the AGP aperture. Returns
170 * AMDGPU_BO_INVALID_OFFSET if that is not possible.
172 uint64_t amdgpu_gmc_agp_addr(struct ttm_buffer_object *bo)
174 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
176 if (bo->ttm->num_pages != 1 || bo->ttm->caching == ttm_cached)
177 return AMDGPU_BO_INVALID_OFFSET;
179 if (bo->ttm->dma_address[0] + PAGE_SIZE >= adev->gmc.agp_size)
180 return AMDGPU_BO_INVALID_OFFSET;
182 return adev->gmc.agp_start + bo->ttm->dma_address[0];
186 * amdgpu_gmc_vram_location - try to find VRAM location
188 * @adev: amdgpu device structure holding all necessary information
189 * @mc: memory controller structure holding memory information
190 * @base: base address at which to put VRAM
192 * Function will try to place VRAM at base address provided
195 void amdgpu_gmc_vram_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc,
198 uint64_t limit = (uint64_t)amdgpu_vram_limit << 20;
200 mc->vram_start = base;
201 mc->vram_end = mc->vram_start + mc->mc_vram_size - 1;
202 if (limit && limit < mc->real_vram_size)
203 mc->real_vram_size = limit;
205 if (mc->xgmi.num_physical_nodes == 0) {
206 mc->fb_start = mc->vram_start;
207 mc->fb_end = mc->vram_end;
209 dev_info(adev->dev, "VRAM: %lluM 0x%016llX - 0x%016llX (%lluM used)\n",
210 mc->mc_vram_size >> 20, mc->vram_start,
211 mc->vram_end, mc->real_vram_size >> 20);
214 /** amdgpu_gmc_sysvm_location - place vram and gart in sysvm aperture
216 * @adev: amdgpu device structure holding all necessary information
217 * @mc: memory controller structure holding memory information
219 * This function is only used if use GART for FB translation. In such
220 * case, we use sysvm aperture (vmid0 page tables) for both vram
221 * and gart (aka system memory) access.
223 * GPUVM (and our organization of vmid0 page tables) require sysvm
224 * aperture to be placed at a location aligned with 8 times of native
225 * page size. For example, if vm_context0_cntl.page_table_block_size
226 * is 12, then native page size is 8G (2M*2^12), sysvm should start
227 * with a 64G aligned address. For simplicity, we just put sysvm at
228 * address 0. So vram start at address 0 and gart is right after vram.
230 void amdgpu_gmc_sysvm_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
232 u64 hive_vram_start = 0;
233 u64 hive_vram_end = mc->xgmi.node_segment_size * mc->xgmi.num_physical_nodes - 1;
234 mc->vram_start = mc->xgmi.node_segment_size * mc->xgmi.physical_node_id;
235 mc->vram_end = mc->vram_start + mc->xgmi.node_segment_size - 1;
236 mc->gart_start = hive_vram_end + 1;
237 mc->gart_end = mc->gart_start + mc->gart_size - 1;
238 mc->fb_start = hive_vram_start;
239 mc->fb_end = hive_vram_end;
240 dev_info(adev->dev, "VRAM: %lluM 0x%016llX - 0x%016llX (%lluM used)\n",
241 mc->mc_vram_size >> 20, mc->vram_start,
242 mc->vram_end, mc->real_vram_size >> 20);
243 dev_info(adev->dev, "GART: %lluM 0x%016llX - 0x%016llX\n",
244 mc->gart_size >> 20, mc->gart_start, mc->gart_end);
248 * amdgpu_gmc_gart_location - try to find GART location
250 * @adev: amdgpu device structure holding all necessary information
251 * @mc: memory controller structure holding memory information
253 * Function will place try to place GART before or after VRAM.
254 * If GART size is bigger than space left then we ajust GART size.
255 * Thus function will never fails.
257 void amdgpu_gmc_gart_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
259 const uint64_t four_gb = 0x100000000ULL;
260 u64 size_af, size_bf;
261 /*To avoid the hole, limit the max mc address to AMDGPU_GMC_HOLE_START*/
262 u64 max_mc_address = min(adev->gmc.mc_mask, AMDGPU_GMC_HOLE_START - 1);
264 /* VCE doesn't like it when BOs cross a 4GB segment, so align
265 * the GART base on a 4GB boundary as well.
267 size_bf = mc->fb_start;
268 size_af = max_mc_address + 1 - ALIGN(mc->fb_end + 1, four_gb);
270 if (mc->gart_size > max(size_bf, size_af)) {
271 dev_warn(adev->dev, "limiting GART\n");
272 mc->gart_size = max(size_bf, size_af);
275 if ((size_bf >= mc->gart_size && size_bf < size_af) ||
276 (size_af < mc->gart_size))
279 mc->gart_start = max_mc_address - mc->gart_size + 1;
281 mc->gart_start &= ~(four_gb - 1);
282 mc->gart_end = mc->gart_start + mc->gart_size - 1;
283 dev_info(adev->dev, "GART: %lluM 0x%016llX - 0x%016llX\n",
284 mc->gart_size >> 20, mc->gart_start, mc->gart_end);
288 * amdgpu_gmc_agp_location - try to find AGP location
289 * @adev: amdgpu device structure holding all necessary information
290 * @mc: memory controller structure holding memory information
292 * Function will place try to find a place for the AGP BAR in the MC address
295 * AGP BAR will be assigned the largest available hole in the address space.
296 * Should be called after VRAM and GART locations are setup.
298 void amdgpu_gmc_agp_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
300 const uint64_t sixteen_gb = 1ULL << 34;
301 const uint64_t sixteen_gb_mask = ~(sixteen_gb - 1);
302 u64 size_af, size_bf;
304 if (amdgpu_sriov_vf(adev)) {
305 mc->agp_start = 0xffffffffffff;
312 if (mc->fb_start > mc->gart_start) {
313 size_bf = (mc->fb_start & sixteen_gb_mask) -
314 ALIGN(mc->gart_end + 1, sixteen_gb);
315 size_af = mc->mc_mask + 1 - ALIGN(mc->fb_end + 1, sixteen_gb);
317 size_bf = mc->fb_start & sixteen_gb_mask;
318 size_af = (mc->gart_start & sixteen_gb_mask) -
319 ALIGN(mc->fb_end + 1, sixteen_gb);
322 if (size_bf > size_af) {
323 mc->agp_start = (mc->fb_start - size_bf) & sixteen_gb_mask;
324 mc->agp_size = size_bf;
326 mc->agp_start = ALIGN(mc->fb_end + 1, sixteen_gb);
327 mc->agp_size = size_af;
330 mc->agp_end = mc->agp_start + mc->agp_size - 1;
331 dev_info(adev->dev, "AGP: %lluM 0x%016llX - 0x%016llX\n",
332 mc->agp_size >> 20, mc->agp_start, mc->agp_end);
336 * amdgpu_gmc_filter_faults - filter VM faults
338 * @adev: amdgpu device structure
339 * @addr: address of the VM fault
340 * @pasid: PASID of the process causing the fault
341 * @timestamp: timestamp of the fault
344 * True if the fault was filtered and should not be processed further.
345 * False if the fault is a new one and needs to be handled.
347 bool amdgpu_gmc_filter_faults(struct amdgpu_device *adev, uint64_t addr,
348 uint16_t pasid, uint64_t timestamp)
350 struct amdgpu_gmc *gmc = &adev->gmc;
352 uint64_t stamp, key = addr << 4 | pasid;
353 struct amdgpu_gmc_fault *fault;
356 /* If we don't have space left in the ring buffer return immediately */
357 stamp = max(timestamp, AMDGPU_GMC_FAULT_TIMEOUT + 1) -
358 AMDGPU_GMC_FAULT_TIMEOUT;
359 if (gmc->fault_ring[gmc->last_fault].timestamp >= stamp)
362 /* Try to find the fault in the hash */
363 hash = hash_64(key, AMDGPU_GMC_FAULT_HASH_ORDER);
364 fault = &gmc->fault_ring[gmc->fault_hash[hash].idx];
365 while (fault->timestamp >= stamp) {
368 if (fault->key == key)
371 tmp = fault->timestamp;
372 fault = &gmc->fault_ring[fault->next];
374 /* Check if the entry was reused */
375 if (fault->timestamp >= tmp)
379 /* Add the fault to the ring */
380 fault = &gmc->fault_ring[gmc->last_fault];
382 fault->timestamp = timestamp;
384 /* And update the hash */
385 fault->next = gmc->fault_hash[hash].idx;
386 gmc->fault_hash[hash].idx = gmc->last_fault++;
390 int amdgpu_gmc_ras_late_init(struct amdgpu_device *adev)
394 if (adev->umc.ras_funcs &&
395 adev->umc.ras_funcs->ras_late_init) {
396 r = adev->umc.ras_funcs->ras_late_init(adev);
401 if (adev->mmhub.ras_funcs &&
402 adev->mmhub.ras_funcs->ras_late_init) {
403 r = adev->mmhub.ras_funcs->ras_late_init(adev);
408 if (!adev->gmc.xgmi.connected_to_cpu)
409 adev->gmc.xgmi.ras_funcs = &xgmi_ras_funcs;
411 if (adev->gmc.xgmi.ras_funcs &&
412 adev->gmc.xgmi.ras_funcs->ras_late_init) {
413 r = adev->gmc.xgmi.ras_funcs->ras_late_init(adev);
421 void amdgpu_gmc_ras_fini(struct amdgpu_device *adev)
423 if (adev->umc.ras_funcs &&
424 adev->umc.ras_funcs->ras_fini)
425 adev->umc.ras_funcs->ras_fini(adev);
427 if (adev->mmhub.ras_funcs &&
428 adev->mmhub.ras_funcs->ras_fini)
429 amdgpu_mmhub_ras_fini(adev);
431 if (adev->gmc.xgmi.ras_funcs &&
432 adev->gmc.xgmi.ras_funcs->ras_fini)
433 adev->gmc.xgmi.ras_funcs->ras_fini(adev);
437 * The latest engine allocation on gfx9/10 is:
438 * Engine 2, 3: firmware
439 * Engine 0, 1, 4~16: amdgpu ring,
440 * subject to change when ring number changes
441 * Engine 17: Gart flushes
443 #define GFXHUB_FREE_VM_INV_ENGS_BITMAP 0x1FFF3
444 #define MMHUB_FREE_VM_INV_ENGS_BITMAP 0x1FFF3
446 int amdgpu_gmc_allocate_vm_inv_eng(struct amdgpu_device *adev)
448 struct amdgpu_ring *ring;
449 unsigned vm_inv_engs[AMDGPU_MAX_VMHUBS] =
450 {GFXHUB_FREE_VM_INV_ENGS_BITMAP, MMHUB_FREE_VM_INV_ENGS_BITMAP,
451 GFXHUB_FREE_VM_INV_ENGS_BITMAP};
453 unsigned vmhub, inv_eng;
455 for (i = 0; i < adev->num_rings; ++i) {
456 ring = adev->rings[i];
457 vmhub = ring->funcs->vmhub;
459 if (ring == &adev->mes.ring)
462 inv_eng = ffs(vm_inv_engs[vmhub]);
464 dev_err(adev->dev, "no VM inv eng for ring %s\n",
469 ring->vm_inv_eng = inv_eng - 1;
470 vm_inv_engs[vmhub] &= ~(1 << ring->vm_inv_eng);
472 dev_info(adev->dev, "ring %s uses VM inv eng %u on hub %u\n",
473 ring->name, ring->vm_inv_eng, ring->funcs->vmhub);
480 * amdgpu_tmz_set -- check and set if a device supports TMZ
481 * @adev: amdgpu_device pointer
483 * Check and set if an the device @adev supports Trusted Memory
486 void amdgpu_gmc_tmz_set(struct amdgpu_device *adev)
488 switch (adev->asic_type) {
491 if (amdgpu_tmz == 0) {
492 adev->gmc.tmz_enabled = false;
494 "Trusted Memory Zone (TMZ) feature disabled (cmd line)\n");
496 adev->gmc.tmz_enabled = true;
498 "Trusted Memory Zone (TMZ) feature enabled\n");
505 /* Don't enable it by default yet.
507 if (amdgpu_tmz < 1) {
508 adev->gmc.tmz_enabled = false;
510 "Trusted Memory Zone (TMZ) feature disabled as experimental (default)\n");
512 adev->gmc.tmz_enabled = true;
514 "Trusted Memory Zone (TMZ) feature enabled as experimental (cmd line)\n");
518 adev->gmc.tmz_enabled = false;
520 "Trusted Memory Zone (TMZ) feature not supported\n");
526 * amdgpu_noretry_set -- set per asic noretry defaults
527 * @adev: amdgpu_device pointer
529 * Set a per asic default for the no-retry parameter.
532 void amdgpu_gmc_noretry_set(struct amdgpu_device *adev)
534 struct amdgpu_gmc *gmc = &adev->gmc;
536 switch (adev->asic_type) {
542 * noretry = 0 will cause kfd page fault tests fail
543 * for some ASICs, so set default to 1 for these ASICs.
545 if (amdgpu_noretry == -1)
548 gmc->noretry = amdgpu_noretry;
552 /* Raven currently has issues with noretry
553 * regardless of what we decide for other
554 * asics, we should leave raven with
555 * noretry = 0 until we root cause the
558 * default this to 0 for now, but we may want
559 * to change this in the future for certain
560 * GPUs as it can increase performance in
563 if (amdgpu_noretry == -1)
566 gmc->noretry = amdgpu_noretry;
571 void amdgpu_gmc_set_vm_fault_masks(struct amdgpu_device *adev, int hub_type,
574 struct amdgpu_vmhub *hub;
577 hub = &adev->vmhub[hub_type];
578 for (i = 0; i < 16; i++) {
579 reg = hub->vm_context0_cntl + hub->ctx_distance * i;
583 tmp |= hub->vm_cntx_cntl_vm_fault;
585 tmp &= ~hub->vm_cntx_cntl_vm_fault;
591 void amdgpu_gmc_get_vbios_allocations(struct amdgpu_device *adev)
597 * Currently there is a bug where some memory client outside
598 * of the driver writes to first 8M of VRAM on S3 resume,
599 * this overrides GART which by default gets placed in first 8M and
600 * causes VM_FAULTS once GTT is accessed.
601 * Keep the stolen memory reservation until the while this is not solved.
603 switch (adev->asic_type) {
607 adev->mman.keep_stolen_vga_memory = true;
610 adev->mman.keep_stolen_vga_memory = false;
614 if (amdgpu_sriov_vf(adev) ||
615 !amdgpu_device_ip_get_ip_block(adev, AMD_IP_BLOCK_TYPE_DCE)) {
618 size = amdgpu_gmc_get_vbios_fb_size(adev);
620 if (adev->mman.keep_stolen_vga_memory)
621 size = max(size, (unsigned)AMDGPU_VBIOS_VGA_ALLOCATION);
624 /* set to 0 if the pre-OS buffer uses up most of vram */
625 if ((adev->gmc.real_vram_size - size) < (8 * 1024 * 1024))
628 if (size > AMDGPU_VBIOS_VGA_ALLOCATION) {
629 adev->mman.stolen_vga_size = AMDGPU_VBIOS_VGA_ALLOCATION;
630 adev->mman.stolen_extended_size = size - adev->mman.stolen_vga_size;
632 adev->mman.stolen_vga_size = size;
633 adev->mman.stolen_extended_size = 0;
638 * amdgpu_gmc_init_pdb0 - initialize PDB0
640 * @adev: amdgpu_device pointer
642 * This function is only used when GART page table is used
643 * for FB address translatioin. In such a case, we construct
644 * a 2-level system VM page table: PDB0->PTB, to cover both
645 * VRAM of the hive and system memory.
647 * PDB0 is static, initialized once on driver initialization.
648 * The first n entries of PDB0 are used as PTE by setting
649 * P bit to 1, pointing to VRAM. The n+1'th entry points
650 * to a big PTB covering system memory.
653 void amdgpu_gmc_init_pdb0(struct amdgpu_device *adev)
656 uint64_t flags = adev->gart.gart_pte_flags; //TODO it is UC. explore NC/RW?
657 /* Each PDE0 (used as PTE) covers (2^vmid0_page_table_block_size)*2M
659 u64 vram_size = adev->gmc.xgmi.node_segment_size * adev->gmc.xgmi.num_physical_nodes;
660 u64 pde0_page_size = (1ULL<<adev->gmc.vmid0_page_table_block_size)<<21;
661 u64 vram_addr = adev->vm_manager.vram_base_offset -
662 adev->gmc.xgmi.physical_node_id * adev->gmc.xgmi.node_segment_size;
663 u64 vram_end = vram_addr + vram_size;
664 u64 gart_ptb_gpu_pa = amdgpu_gmc_vram_pa(adev, adev->gart.bo);
666 flags |= AMDGPU_PTE_VALID | AMDGPU_PTE_READABLE;
667 flags |= AMDGPU_PTE_WRITEABLE;
668 flags |= AMDGPU_PTE_SNOOPED;
669 flags |= AMDGPU_PTE_FRAG((adev->gmc.vmid0_page_table_block_size + 9*1));
670 flags |= AMDGPU_PDE_PTE;
672 /* The first n PDE0 entries are used as PTE,
675 for (i = 0; vram_addr < vram_end; i++, vram_addr += pde0_page_size)
676 amdgpu_gmc_set_pte_pde(adev, adev->gmc.ptr_pdb0, i, vram_addr, flags);
678 /* The n+1'th PDE0 entry points to a huge
679 * PTB who has more than 512 entries each
680 * pointing to a 4K system page
682 flags = AMDGPU_PTE_VALID;
683 flags |= AMDGPU_PDE_BFS(0) | AMDGPU_PTE_SNOOPED;
684 /* Requires gart_ptb_gpu_pa to be 4K aligned */
685 amdgpu_gmc_set_pte_pde(adev, adev->gmc.ptr_pdb0, i, gart_ptb_gpu_pa, flags);
689 * amdgpu_gmc_vram_mc2pa - calculate vram buffer's physical address from MC
692 * @adev: amdgpu_device pointer
693 * @mc_addr: MC address of buffer
695 uint64_t amdgpu_gmc_vram_mc2pa(struct amdgpu_device *adev, uint64_t mc_addr)
697 return mc_addr - adev->gmc.vram_start + adev->vm_manager.vram_base_offset;
701 * amdgpu_gmc_vram_pa - calculate vram buffer object's physical address from
704 * @adev: amdgpu_device pointer
705 * @bo: amdgpu buffer object
707 uint64_t amdgpu_gmc_vram_pa(struct amdgpu_device *adev, struct amdgpu_bo *bo)
709 return amdgpu_gmc_vram_mc2pa(adev, amdgpu_bo_gpu_offset(bo));
713 * amdgpu_gmc_vram_cpu_pa - calculate vram buffer object's physical address
716 * @adev: amdgpu_device pointer
717 * @bo: amdgpu buffer object
719 uint64_t amdgpu_gmc_vram_cpu_pa(struct amdgpu_device *adev, struct amdgpu_bo *bo)
721 return amdgpu_bo_gpu_offset(bo) - adev->gmc.vram_start + adev->gmc.aper_base;