1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
|
/*
* Copyright 2018 Advanced Micro Devices, Inc.
* All Rights Reserved.
*
* 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
*/
#include <linux/io-64-nonatomic-lo-hi.h>
#include "amdgpu.h"
/**
* amdgpu_gmc_get_pde_for_bo - get the PDE for a BO
*
* @bo: the BO to get the PDE for
* @level: the level in the PD hirarchy
* @addr: resulting addr
* @flags: resulting flags
*
* Get the address and flags to be used for a PDE (Page Directory Entry).
*/
void amdgpu_gmc_get_pde_for_bo(struct amdgpu_bo *bo, int level,
uint64_t *addr, uint64_t *flags)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
struct ttm_dma_tt *ttm;
switch (bo->tbo.mem.mem_type) {
case TTM_PL_TT:
ttm = container_of(bo->tbo.ttm, struct ttm_dma_tt, ttm);
*addr = ttm->dma_address[0];
break;
case TTM_PL_VRAM:
*addr = amdgpu_bo_gpu_offset(bo);
break;
default:
*addr = 0;
break;
}
*flags = amdgpu_ttm_tt_pde_flags(bo->tbo.ttm, &bo->tbo.mem);
amdgpu_gmc_get_vm_pde(adev, level, addr, flags);
}
/**
* amdgpu_gmc_pd_addr - return the address of the root directory
*
*/
uint64_t amdgpu_gmc_pd_addr(struct amdgpu_bo *bo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
uint64_t pd_addr;
/* TODO: move that into ASIC specific code */
if (adev->asic_type >= CHIP_VEGA10) {
uint64_t flags = AMDGPU_PTE_VALID;
amdgpu_gmc_get_pde_for_bo(bo, -1, &pd_addr, &flags);
pd_addr |= flags;
} else {
pd_addr = amdgpu_bo_gpu_offset(bo);
}
return pd_addr;
}
/**
* amdgpu_gmc_set_pte_pde - update the page tables using CPU
*
* @adev: amdgpu_device pointer
* @cpu_pt_addr: cpu address of the page table
* @gpu_page_idx: entry in the page table to update
* @addr: dst addr to write into pte/pde
* @flags: access flags
*
* Update the page tables using CPU.
*/
int amdgpu_gmc_set_pte_pde(struct amdgpu_device *adev, void *cpu_pt_addr,
uint32_t gpu_page_idx, uint64_t addr,
uint64_t flags)
{
void __iomem *ptr = (void *)cpu_pt_addr;
uint64_t value;
/*
* The following is for PTE only. GART does not have PDEs.
*/
value = addr & 0x0000FFFFFFFFF000ULL;
value |= flags;
writeq(value, ptr + (gpu_page_idx * 8));
return 0;
}
/**
* amdgpu_gmc_agp_addr - return the address in the AGP address space
*
* @tbo: TTM BO which needs the address, must be in GTT domain
*
* Tries to figure out how to access the BO through the AGP aperture. Returns
* AMDGPU_BO_INVALID_OFFSET if that is not possible.
*/
uint64_t amdgpu_gmc_agp_addr(struct ttm_buffer_object *bo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
struct ttm_dma_tt *ttm;
if (bo->num_pages != 1 || bo->ttm->caching_state == tt_cached)
return AMDGPU_BO_INVALID_OFFSET;
ttm = container_of(bo->ttm, struct ttm_dma_tt, ttm);
if (ttm->dma_address[0] + PAGE_SIZE >= adev->gmc.agp_size)
return AMDGPU_BO_INVALID_OFFSET;
return adev->gmc.agp_start + ttm->dma_address[0];
}
/**
* amdgpu_gmc_vram_location - try to find VRAM location
*
* @adev: amdgpu device structure holding all necessary informations
* @mc: memory controller structure holding memory informations
* @base: base address at which to put VRAM
*
* Function will try to place VRAM at base address provided
* as parameter.
*/
void amdgpu_gmc_vram_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc,
u64 base)
{
uint64_t limit = (uint64_t)amdgpu_vram_limit << 20;
mc->vram_start = base;
mc->vram_end = mc->vram_start + mc->mc_vram_size - 1;
if (limit && limit < mc->real_vram_size)
mc->real_vram_size = limit;
if (mc->xgmi.num_physical_nodes == 0) {
mc->fb_start = mc->vram_start;
mc->fb_end = mc->vram_end;
}
dev_info(adev->dev, "VRAM: %lluM 0x%016llX - 0x%016llX (%lluM used)\n",
mc->mc_vram_size >> 20, mc->vram_start,
mc->vram_end, mc->real_vram_size >> 20);
}
/**
* amdgpu_gmc_gart_location - try to find GART location
*
* @adev: amdgpu device structure holding all necessary informations
* @mc: memory controller structure holding memory informations
*
* Function will place try to place GART before or after VRAM.
*
* If GART size is bigger than space left then we ajust GART size.
* Thus function will never fails.
*/
void amdgpu_gmc_gart_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
{
const uint64_t four_gb = 0x100000000ULL;
u64 size_af, size_bf;
/*To avoid the hole, limit the max mc address to AMDGPU_GMC_HOLE_START*/
u64 max_mc_address = min(adev->gmc.mc_mask, AMDGPU_GMC_HOLE_START - 1);
mc->gart_size += adev->pm.smu_prv_buffer_size;
/* VCE doesn't like it when BOs cross a 4GB segment, so align
* the GART base on a 4GB boundary as well.
*/
size_bf = mc->fb_start;
size_af = max_mc_address + 1 - ALIGN(mc->fb_end + 1, four_gb);
if (mc->gart_size > max(size_bf, size_af)) {
dev_warn(adev->dev, "limiting GART\n");
mc->gart_size = max(size_bf, size_af);
}
if ((size_bf >= mc->gart_size && size_bf < size_af) ||
(size_af < mc->gart_size))
mc->gart_start = 0;
else
mc->gart_start = max_mc_address - mc->gart_size + 1;
mc->gart_start &= ~(four_gb - 1);
mc->gart_end = mc->gart_start + mc->gart_size - 1;
dev_info(adev->dev, "GART: %lluM 0x%016llX - 0x%016llX\n",
mc->gart_size >> 20, mc->gart_start, mc->gart_end);
}
/**
* amdgpu_gmc_agp_location - try to find AGP location
* @adev: amdgpu device structure holding all necessary informations
* @mc: memory controller structure holding memory informations
*
* Function will place try to find a place for the AGP BAR in the MC address
* space.
*
* AGP BAR will be assigned the largest available hole in the address space.
* Should be called after VRAM and GART locations are setup.
*/
void amdgpu_gmc_agp_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
{
const uint64_t sixteen_gb = 1ULL << 34;
const uint64_t sixteen_gb_mask = ~(sixteen_gb - 1);
u64 size_af, size_bf;
if (amdgpu_sriov_vf(adev)) {
mc->agp_start = 0xffffffff;
mc->agp_end = 0x0;
mc->agp_size = 0;
return;
}
if (mc->fb_start > mc->gart_start) {
size_bf = (mc->fb_start & sixteen_gb_mask) -
ALIGN(mc->gart_end + 1, sixteen_gb);
size_af = mc->mc_mask + 1 - ALIGN(mc->fb_end + 1, sixteen_gb);
} else {
size_bf = mc->fb_start & sixteen_gb_mask;
size_af = (mc->gart_start & sixteen_gb_mask) -
ALIGN(mc->fb_end + 1, sixteen_gb);
}
if (size_bf > size_af) {
mc->agp_start = (mc->fb_start - size_bf) & sixteen_gb_mask;
mc->agp_size = size_bf;
} else {
mc->agp_start = ALIGN(mc->fb_end + 1, sixteen_gb);
mc->agp_size = size_af;
}
mc->agp_end = mc->agp_start + mc->agp_size - 1;
dev_info(adev->dev, "AGP: %lluM 0x%016llX - 0x%016llX\n",
mc->agp_size >> 20, mc->agp_start, mc->agp_end);
}
/**
* amdgpu_gmc_filter_faults - filter VM faults
*
* @adev: amdgpu device structure
* @addr: address of the VM fault
* @pasid: PASID of the process causing the fault
* @timestamp: timestamp of the fault
*
* Returns:
* True if the fault was filtered and should not be processed further.
* False if the fault is a new one and needs to be handled.
*/
bool amdgpu_gmc_filter_faults(struct amdgpu_device *adev, uint64_t addr,
uint16_t pasid, uint64_t timestamp)
{
struct amdgpu_gmc *gmc = &adev->gmc;
uint64_t stamp, key = addr << 4 | pasid;
struct amdgpu_gmc_fault *fault;
uint32_t hash;
/* If we don't have space left in the ring buffer return immediately */
stamp = max(timestamp, AMDGPU_GMC_FAULT_TIMEOUT + 1) -
AMDGPU_GMC_FAULT_TIMEOUT;
if (gmc->fault_ring[gmc->last_fault].timestamp >= stamp)
return true;
/* Try to find the fault in the hash */
hash = hash_64(key, AMDGPU_GMC_FAULT_HASH_ORDER);
fault = &gmc->fault_ring[gmc->fault_hash[hash].idx];
while (fault->timestamp >= stamp) {
uint64_t tmp;
if (fault->key == key)
return true;
tmp = fault->timestamp;
fault = &gmc->fault_ring[fault->next];
/* Check if the entry was reused */
if (fault->timestamp >= tmp)
break;
}
/* Add the fault to the ring */
fault = &gmc->fault_ring[gmc->last_fault];
fault->key = key;
fault->timestamp = timestamp;
/* And update the hash */
fault->next = gmc->fault_hash[hash].idx;
gmc->fault_hash[hash].idx = gmc->last_fault++;
return false;
}
|