2 * Copyright 2018 Advanced Micro Devices, Inc.
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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_get_pde_for_bo - get the PDE for a BO
37 * @bo: the BO to get the PDE for
38 * @level: the level in the PD hirarchy
39 * @addr: resulting addr
40 * @flags: resulting flags
42 * Get the address and flags to be used for a PDE (Page Directory Entry).
44 void amdgpu_gmc_get_pde_for_bo(struct amdgpu_bo *bo, int level,
45 uint64_t *addr, uint64_t *flags)
47 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
49 switch (bo->tbo.mem.mem_type) {
51 *addr = bo->tbo.ttm->dma_address[0];
54 *addr = amdgpu_bo_gpu_offset(bo);
60 *flags = amdgpu_ttm_tt_pde_flags(bo->tbo.ttm, &bo->tbo.mem);
61 amdgpu_gmc_get_vm_pde(adev, level, addr, flags);
65 * amdgpu_gmc_pd_addr - return the address of the root directory
68 uint64_t amdgpu_gmc_pd_addr(struct amdgpu_bo *bo)
70 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
73 /* TODO: move that into ASIC specific code */
74 if (adev->asic_type >= CHIP_VEGA10) {
75 uint64_t flags = AMDGPU_PTE_VALID;
77 amdgpu_gmc_get_pde_for_bo(bo, -1, &pd_addr, &flags);
80 pd_addr = amdgpu_bo_gpu_offset(bo);
86 * amdgpu_gmc_set_pte_pde - update the page tables using CPU
88 * @adev: amdgpu_device pointer
89 * @cpu_pt_addr: cpu address of the page table
90 * @gpu_page_idx: entry in the page table to update
91 * @addr: dst addr to write into pte/pde
92 * @flags: access flags
94 * Update the page tables using CPU.
96 int amdgpu_gmc_set_pte_pde(struct amdgpu_device *adev, void *cpu_pt_addr,
97 uint32_t gpu_page_idx, uint64_t addr,
100 void __iomem *ptr = (void *)cpu_pt_addr;
104 * The following is for PTE only. GART does not have PDEs.
106 value = addr & 0x0000FFFFFFFFF000ULL;
108 writeq(value, ptr + (gpu_page_idx * 8));
113 * amdgpu_gmc_agp_addr - return the address in the AGP address space
115 * @tbo: TTM BO which needs the address, must be in GTT domain
117 * Tries to figure out how to access the BO through the AGP aperture. Returns
118 * AMDGPU_BO_INVALID_OFFSET if that is not possible.
120 uint64_t amdgpu_gmc_agp_addr(struct ttm_buffer_object *bo)
122 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
124 if (bo->num_pages != 1 || bo->ttm->caching == ttm_cached)
125 return AMDGPU_BO_INVALID_OFFSET;
127 if (bo->ttm->dma_address[0] + PAGE_SIZE >= adev->gmc.agp_size)
128 return AMDGPU_BO_INVALID_OFFSET;
130 return adev->gmc.agp_start + bo->ttm->dma_address[0];
134 * amdgpu_gmc_vram_location - try to find VRAM location
136 * @adev: amdgpu device structure holding all necessary information
137 * @mc: memory controller structure holding memory information
138 * @base: base address at which to put VRAM
140 * Function will try to place VRAM at base address provided
143 void amdgpu_gmc_vram_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc,
146 uint64_t limit = (uint64_t)amdgpu_vram_limit << 20;
148 mc->vram_start = base;
149 mc->vram_end = mc->vram_start + mc->mc_vram_size - 1;
150 if (limit && limit < mc->real_vram_size)
151 mc->real_vram_size = limit;
153 if (mc->xgmi.num_physical_nodes == 0) {
154 mc->fb_start = mc->vram_start;
155 mc->fb_end = mc->vram_end;
157 dev_info(adev->dev, "VRAM: %lluM 0x%016llX - 0x%016llX (%lluM used)\n",
158 mc->mc_vram_size >> 20, mc->vram_start,
159 mc->vram_end, mc->real_vram_size >> 20);
163 * amdgpu_gmc_gart_location - try to find GART location
165 * @adev: amdgpu device structure holding all necessary information
166 * @mc: memory controller structure holding memory information
168 * Function will place try to place GART before or after VRAM.
170 * If GART size is bigger than space left then we ajust GART size.
171 * Thus function will never fails.
173 void amdgpu_gmc_gart_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
175 const uint64_t four_gb = 0x100000000ULL;
176 u64 size_af, size_bf;
177 /*To avoid the hole, limit the max mc address to AMDGPU_GMC_HOLE_START*/
178 u64 max_mc_address = min(adev->gmc.mc_mask, AMDGPU_GMC_HOLE_START - 1);
180 mc->gart_size += adev->pm.smu_prv_buffer_size;
182 /* VCE doesn't like it when BOs cross a 4GB segment, so align
183 * the GART base on a 4GB boundary as well.
185 size_bf = mc->fb_start;
186 size_af = max_mc_address + 1 - ALIGN(mc->fb_end + 1, four_gb);
188 if (mc->gart_size > max(size_bf, size_af)) {
189 dev_warn(adev->dev, "limiting GART\n");
190 mc->gart_size = max(size_bf, size_af);
193 if ((size_bf >= mc->gart_size && size_bf < size_af) ||
194 (size_af < mc->gart_size))
197 mc->gart_start = max_mc_address - mc->gart_size + 1;
199 mc->gart_start &= ~(four_gb - 1);
200 mc->gart_end = mc->gart_start + mc->gart_size - 1;
201 dev_info(adev->dev, "GART: %lluM 0x%016llX - 0x%016llX\n",
202 mc->gart_size >> 20, mc->gart_start, mc->gart_end);
206 * amdgpu_gmc_agp_location - try to find AGP location
207 * @adev: amdgpu device structure holding all necessary information
208 * @mc: memory controller structure holding memory information
210 * Function will place try to find a place for the AGP BAR in the MC address
213 * AGP BAR will be assigned the largest available hole in the address space.
214 * Should be called after VRAM and GART locations are setup.
216 void amdgpu_gmc_agp_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
218 const uint64_t sixteen_gb = 1ULL << 34;
219 const uint64_t sixteen_gb_mask = ~(sixteen_gb - 1);
220 u64 size_af, size_bf;
222 if (amdgpu_sriov_vf(adev)) {
223 mc->agp_start = 0xffffffffffff;
230 if (mc->fb_start > mc->gart_start) {
231 size_bf = (mc->fb_start & sixteen_gb_mask) -
232 ALIGN(mc->gart_end + 1, sixteen_gb);
233 size_af = mc->mc_mask + 1 - ALIGN(mc->fb_end + 1, sixteen_gb);
235 size_bf = mc->fb_start & sixteen_gb_mask;
236 size_af = (mc->gart_start & sixteen_gb_mask) -
237 ALIGN(mc->fb_end + 1, sixteen_gb);
240 if (size_bf > size_af) {
241 mc->agp_start = (mc->fb_start - size_bf) & sixteen_gb_mask;
242 mc->agp_size = size_bf;
244 mc->agp_start = ALIGN(mc->fb_end + 1, sixteen_gb);
245 mc->agp_size = size_af;
248 mc->agp_end = mc->agp_start + mc->agp_size - 1;
249 dev_info(adev->dev, "AGP: %lluM 0x%016llX - 0x%016llX\n",
250 mc->agp_size >> 20, mc->agp_start, mc->agp_end);
254 * amdgpu_gmc_filter_faults - filter VM faults
256 * @adev: amdgpu device structure
257 * @addr: address of the VM fault
258 * @pasid: PASID of the process causing the fault
259 * @timestamp: timestamp of the fault
262 * True if the fault was filtered and should not be processed further.
263 * False if the fault is a new one and needs to be handled.
265 bool amdgpu_gmc_filter_faults(struct amdgpu_device *adev, uint64_t addr,
266 uint16_t pasid, uint64_t timestamp)
268 struct amdgpu_gmc *gmc = &adev->gmc;
270 uint64_t stamp, key = addr << 4 | pasid;
271 struct amdgpu_gmc_fault *fault;
274 /* If we don't have space left in the ring buffer return immediately */
275 stamp = max(timestamp, AMDGPU_GMC_FAULT_TIMEOUT + 1) -
276 AMDGPU_GMC_FAULT_TIMEOUT;
277 if (gmc->fault_ring[gmc->last_fault].timestamp >= stamp)
280 /* Try to find the fault in the hash */
281 hash = hash_64(key, AMDGPU_GMC_FAULT_HASH_ORDER);
282 fault = &gmc->fault_ring[gmc->fault_hash[hash].idx];
283 while (fault->timestamp >= stamp) {
286 if (fault->key == key)
289 tmp = fault->timestamp;
290 fault = &gmc->fault_ring[fault->next];
292 /* Check if the entry was reused */
293 if (fault->timestamp >= tmp)
297 /* Add the fault to the ring */
298 fault = &gmc->fault_ring[gmc->last_fault];
300 fault->timestamp = timestamp;
302 /* And update the hash */
303 fault->next = gmc->fault_hash[hash].idx;
304 gmc->fault_hash[hash].idx = gmc->last_fault++;
308 int amdgpu_gmc_ras_late_init(struct amdgpu_device *adev)
312 if (adev->umc.funcs && adev->umc.funcs->ras_late_init) {
313 r = adev->umc.funcs->ras_late_init(adev);
318 if (adev->mmhub.funcs && adev->mmhub.funcs->ras_late_init) {
319 r = adev->mmhub.funcs->ras_late_init(adev);
324 return amdgpu_xgmi_ras_late_init(adev);
327 void amdgpu_gmc_ras_fini(struct amdgpu_device *adev)
329 amdgpu_umc_ras_fini(adev);
330 amdgpu_mmhub_ras_fini(adev);
331 amdgpu_xgmi_ras_fini(adev);
335 * The latest engine allocation on gfx9/10 is:
336 * Engine 2, 3: firmware
337 * Engine 0, 1, 4~16: amdgpu ring,
338 * subject to change when ring number changes
339 * Engine 17: Gart flushes
341 #define GFXHUB_FREE_VM_INV_ENGS_BITMAP 0x1FFF3
342 #define MMHUB_FREE_VM_INV_ENGS_BITMAP 0x1FFF3
344 int amdgpu_gmc_allocate_vm_inv_eng(struct amdgpu_device *adev)
346 struct amdgpu_ring *ring;
347 unsigned vm_inv_engs[AMDGPU_MAX_VMHUBS] =
348 {GFXHUB_FREE_VM_INV_ENGS_BITMAP, MMHUB_FREE_VM_INV_ENGS_BITMAP,
349 GFXHUB_FREE_VM_INV_ENGS_BITMAP};
351 unsigned vmhub, inv_eng;
353 for (i = 0; i < adev->num_rings; ++i) {
354 ring = adev->rings[i];
355 vmhub = ring->funcs->vmhub;
357 if (ring == &adev->mes.ring)
360 inv_eng = ffs(vm_inv_engs[vmhub]);
362 dev_err(adev->dev, "no VM inv eng for ring %s\n",
367 ring->vm_inv_eng = inv_eng - 1;
368 vm_inv_engs[vmhub] &= ~(1 << ring->vm_inv_eng);
370 dev_info(adev->dev, "ring %s uses VM inv eng %u on hub %u\n",
371 ring->name, ring->vm_inv_eng, ring->funcs->vmhub);
378 * amdgpu_tmz_set -- check and set if a device supports TMZ
379 * @adev: amdgpu_device pointer
381 * Check and set if an the device @adev supports Trusted Memory
384 void amdgpu_gmc_tmz_set(struct amdgpu_device *adev)
386 switch (adev->asic_type) {
392 /* Don't enable it by default yet.
394 if (amdgpu_tmz < 1) {
395 adev->gmc.tmz_enabled = false;
397 "Trusted Memory Zone (TMZ) feature disabled as experimental (default)\n");
399 adev->gmc.tmz_enabled = true;
401 "Trusted Memory Zone (TMZ) feature enabled as experimental (cmd line)\n");
405 adev->gmc.tmz_enabled = false;
407 "Trusted Memory Zone (TMZ) feature not supported\n");
413 * amdgpu_noretry_set -- set per asic noretry defaults
414 * @adev: amdgpu_device pointer
416 * Set a per asic default for the no-retry parameter.
419 void amdgpu_gmc_noretry_set(struct amdgpu_device *adev)
421 struct amdgpu_gmc *gmc = &adev->gmc;
423 switch (adev->asic_type) {
425 /* Raven currently has issues with noretry
426 * regardless of what we decide for other
427 * asics, we should leave raven with
428 * noretry = 0 until we root cause the
431 if (amdgpu_noretry == -1)
434 gmc->noretry = amdgpu_noretry;
437 /* default this to 0 for now, but we may want
438 * to change this in the future for certain
439 * GPUs as it can increase performance in
442 if (amdgpu_noretry == -1)
445 gmc->noretry = amdgpu_noretry;
450 void amdgpu_gmc_set_vm_fault_masks(struct amdgpu_device *adev, int hub_type,
453 struct amdgpu_vmhub *hub;
456 hub = &adev->vmhub[hub_type];
457 for (i = 0; i < 16; i++) {
458 reg = hub->vm_context0_cntl + hub->ctx_distance * i;
462 tmp |= hub->vm_cntx_cntl_vm_fault;
464 tmp &= ~hub->vm_cntx_cntl_vm_fault;
470 void amdgpu_gmc_get_vbios_allocations(struct amdgpu_device *adev)
476 * Currently there is a bug where some memory client outside
477 * of the driver writes to first 8M of VRAM on S3 resume,
478 * this overrides GART which by default gets placed in first 8M and
479 * causes VM_FAULTS once GTT is accessed.
480 * Keep the stolen memory reservation until the while this is not solved.
482 switch (adev->asic_type) {
486 adev->mman.keep_stolen_vga_memory = true;
489 adev->mman.keep_stolen_vga_memory = false;
493 if (!amdgpu_device_ip_get_ip_block(adev, AMD_IP_BLOCK_TYPE_DCE))
496 size = amdgpu_gmc_get_vbios_fb_size(adev);
498 /* set to 0 if the pre-OS buffer uses up most of vram */
499 if ((adev->gmc.real_vram_size - size) < (8 * 1024 * 1024))
502 if (size > AMDGPU_VBIOS_VGA_ALLOCATION) {
503 adev->mman.stolen_vga_size = AMDGPU_VBIOS_VGA_ALLOCATION;
504 adev->mman.stolen_extended_size = size - adev->mman.stolen_vga_size;
506 adev->mman.stolen_vga_size = size;
507 adev->mman.stolen_extended_size = 0;