1 // SPDX-License-Identifier: GPL-2.0 OR MIT
2 /*
3  * Copyright (c) 2007-2008 Tungsten Graphics, Inc., Cedar Park, TX., USA,
4  * Copyright (c) 2009 VMware, Inc., Palo Alto, CA., USA,
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sub license,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the
14  * next paragraph) shall be included in all copies or substantial portions
15  * of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
20  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
21  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
22  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
23  * USE OR OTHER DEALINGS IN THE SOFTWARE.
24  */
25 
26 #include <linux/limits.h>
27 #include <linux/swiotlb.h>
28 
29 #include "nouveau_drv.h"
30 #include "nouveau_gem.h"
31 #include "nouveau_mem.h"
32 #include "nouveau_ttm.h"
33 
34 #include <drm/drm_legacy.h>
35 
36 #include <core/tegra.h>
37 
38 static void
39 nouveau_manager_del(struct ttm_resource_manager *man, struct ttm_resource *reg)
40 {
41 	nouveau_mem_del(reg);
42 }
43 
44 static int
45 nouveau_vram_manager_new(struct ttm_resource_manager *man,
46 			 struct ttm_buffer_object *bo,
47 			 const struct ttm_place *place,
48 			 struct ttm_resource *reg)
49 {
50 	struct nouveau_bo *nvbo = nouveau_bo(bo);
51 	struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
52 	int ret;
53 
54 	if (drm->client.device.info.ram_size == 0)
55 		return -ENOMEM;
56 
57 	ret = nouveau_mem_new(&drm->master, nvbo->kind, nvbo->comp, reg);
58 	if (ret)
59 		return ret;
60 
61 	ret = nouveau_mem_vram(reg, nvbo->contig, nvbo->page);
62 	if (ret) {
63 		nouveau_mem_del(reg);
64 		return ret;
65 	}
66 
67 	return 0;
68 }
69 
70 const struct ttm_resource_manager_func nouveau_vram_manager = {
71 	.alloc = nouveau_vram_manager_new,
72 	.free = nouveau_manager_del,
73 };
74 
75 static int
76 nouveau_gart_manager_new(struct ttm_resource_manager *man,
77 			 struct ttm_buffer_object *bo,
78 			 const struct ttm_place *place,
79 			 struct ttm_resource *reg)
80 {
81 	struct nouveau_bo *nvbo = nouveau_bo(bo);
82 	struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
83 	int ret;
84 
85 	ret = nouveau_mem_new(&drm->master, nvbo->kind, nvbo->comp, reg);
86 	if (ret)
87 		return ret;
88 
89 	reg->start = 0;
90 	return 0;
91 }
92 
93 const struct ttm_resource_manager_func nouveau_gart_manager = {
94 	.alloc = nouveau_gart_manager_new,
95 	.free = nouveau_manager_del,
96 };
97 
98 static int
99 nv04_gart_manager_new(struct ttm_resource_manager *man,
100 		      struct ttm_buffer_object *bo,
101 		      const struct ttm_place *place,
102 		      struct ttm_resource *reg)
103 {
104 	struct nouveau_bo *nvbo = nouveau_bo(bo);
105 	struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
106 	struct nouveau_mem *mem;
107 	int ret;
108 
109 	ret = nouveau_mem_new(&drm->master, nvbo->kind, nvbo->comp, reg);
110 	mem = nouveau_mem(reg);
111 	if (ret)
112 		return ret;
113 
114 	ret = nvif_vmm_get(&mem->cli->vmm.vmm, PTES, false, 12, 0,
115 			   (long)reg->num_pages << PAGE_SHIFT, &mem->vma[0]);
116 	if (ret) {
117 		nouveau_mem_del(reg);
118 		return ret;
119 	}
120 
121 	reg->start = mem->vma[0].addr >> PAGE_SHIFT;
122 	return 0;
123 }
124 
125 const struct ttm_resource_manager_func nv04_gart_manager = {
126 	.alloc = nv04_gart_manager_new,
127 	.free = nouveau_manager_del,
128 };
129 
130 static vm_fault_t nouveau_ttm_fault(struct vm_fault *vmf)
131 {
132 	struct vm_area_struct *vma = vmf->vma;
133 	struct ttm_buffer_object *bo = vma->vm_private_data;
134 	pgprot_t prot;
135 	vm_fault_t ret;
136 
137 	ret = ttm_bo_vm_reserve(bo, vmf);
138 	if (ret)
139 		return ret;
140 
141 	ret = nouveau_ttm_fault_reserve_notify(bo);
142 	if (ret)
143 		goto error_unlock;
144 
145 	nouveau_bo_del_io_reserve_lru(bo);
146 	prot = vm_get_page_prot(vma->vm_flags);
147 	ret = ttm_bo_vm_fault_reserved(vmf, prot, TTM_BO_VM_NUM_PREFAULT, 1);
148 	nouveau_bo_add_io_reserve_lru(bo);
149 	if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT))
150 		return ret;
151 
152 error_unlock:
153 	dma_resv_unlock(bo->base.resv);
154 	return ret;
155 }
156 
157 static struct vm_operations_struct nouveau_ttm_vm_ops = {
158 	.fault = nouveau_ttm_fault,
159 	.open = ttm_bo_vm_open,
160 	.close = ttm_bo_vm_close,
161 	.access = ttm_bo_vm_access
162 };
163 
164 int
165 nouveau_ttm_mmap(struct file *filp, struct vm_area_struct *vma)
166 {
167 	struct drm_file *file_priv = filp->private_data;
168 	struct nouveau_drm *drm = nouveau_drm(file_priv->minor->dev);
169 	int ret;
170 
171 	ret = ttm_bo_mmap(filp, vma, &drm->ttm.bdev);
172 	if (ret)
173 		return ret;
174 
175 	vma->vm_ops = &nouveau_ttm_vm_ops;
176 	return 0;
177 }
178 
179 static int
180 nouveau_ttm_init_host(struct nouveau_drm *drm, u8 kind)
181 {
182 	struct nvif_mmu *mmu = &drm->client.mmu;
183 	int typei;
184 
185 	typei = nvif_mmu_type(mmu, NVIF_MEM_HOST | NVIF_MEM_MAPPABLE |
186 					    kind | NVIF_MEM_COHERENT);
187 	if (typei < 0)
188 		return -ENOSYS;
189 
190 	drm->ttm.type_host[!!kind] = typei;
191 
192 	typei = nvif_mmu_type(mmu, NVIF_MEM_HOST | NVIF_MEM_MAPPABLE | kind);
193 	if (typei < 0)
194 		return -ENOSYS;
195 
196 	drm->ttm.type_ncoh[!!kind] = typei;
197 	return 0;
198 }
199 
200 static int
201 nouveau_ttm_init_vram(struct nouveau_drm *drm)
202 {
203 	if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
204 		struct ttm_resource_manager *man = kzalloc(sizeof(*man), GFP_KERNEL);
205 
206 		if (!man)
207 			return -ENOMEM;
208 
209 		man->func = &nouveau_vram_manager;
210 
211 		ttm_resource_manager_init(man,
212 					  drm->gem.vram_available >> PAGE_SHIFT);
213 		ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_VRAM, man);
214 		ttm_resource_manager_set_used(man, true);
215 		return 0;
216 	} else {
217 		return ttm_range_man_init(&drm->ttm.bdev, TTM_PL_VRAM, false,
218 					  drm->gem.vram_available >> PAGE_SHIFT);
219 	}
220 }
221 
222 static void
223 nouveau_ttm_fini_vram(struct nouveau_drm *drm)
224 {
225 	struct ttm_resource_manager *man = ttm_manager_type(&drm->ttm.bdev, TTM_PL_VRAM);
226 
227 	if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
228 		ttm_resource_manager_set_used(man, false);
229 		ttm_resource_manager_evict_all(&drm->ttm.bdev, man);
230 		ttm_resource_manager_cleanup(man);
231 		ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_VRAM, NULL);
232 		kfree(man);
233 	} else
234 		ttm_range_man_fini(&drm->ttm.bdev, TTM_PL_VRAM);
235 }
236 
237 static int
238 nouveau_ttm_init_gtt(struct nouveau_drm *drm)
239 {
240 	struct ttm_resource_manager *man;
241 	unsigned long size_pages = drm->gem.gart_available >> PAGE_SHIFT;
242 	const struct ttm_resource_manager_func *func = NULL;
243 
244 	if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA)
245 		func = &nouveau_gart_manager;
246 	else if (!drm->agp.bridge)
247 		func = &nv04_gart_manager;
248 	else
249 		return ttm_range_man_init(&drm->ttm.bdev, TTM_PL_TT, true,
250 					  size_pages);
251 
252 	man = kzalloc(sizeof(*man), GFP_KERNEL);
253 	if (!man)
254 		return -ENOMEM;
255 
256 	man->func = func;
257 	man->use_tt = true;
258 	ttm_resource_manager_init(man, size_pages);
259 	ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_TT, man);
260 	ttm_resource_manager_set_used(man, true);
261 	return 0;
262 }
263 
264 static void
265 nouveau_ttm_fini_gtt(struct nouveau_drm *drm)
266 {
267 	struct ttm_resource_manager *man = ttm_manager_type(&drm->ttm.bdev, TTM_PL_TT);
268 
269 	if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA &&
270 	    drm->agp.bridge)
271 		ttm_range_man_fini(&drm->ttm.bdev, TTM_PL_TT);
272 	else {
273 		ttm_resource_manager_set_used(man, false);
274 		ttm_resource_manager_evict_all(&drm->ttm.bdev, man);
275 		ttm_resource_manager_cleanup(man);
276 		ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_TT, NULL);
277 		kfree(man);
278 	}
279 }
280 
281 int
282 nouveau_ttm_init(struct nouveau_drm *drm)
283 {
284 	struct nvkm_device *device = nvxx_device(&drm->client.device);
285 	struct nvkm_pci *pci = device->pci;
286 	struct nvif_mmu *mmu = &drm->client.mmu;
287 	struct drm_device *dev = drm->dev;
288 	bool need_swiotlb = false;
289 	int typei, ret;
290 
291 	ret = nouveau_ttm_init_host(drm, 0);
292 	if (ret)
293 		return ret;
294 
295 	if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA &&
296 	    drm->client.device.info.chipset != 0x50) {
297 		ret = nouveau_ttm_init_host(drm, NVIF_MEM_KIND);
298 		if (ret)
299 			return ret;
300 	}
301 
302 	if (drm->client.device.info.platform != NV_DEVICE_INFO_V0_SOC &&
303 	    drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
304 		typei = nvif_mmu_type(mmu, NVIF_MEM_VRAM | NVIF_MEM_MAPPABLE |
305 					   NVIF_MEM_KIND |
306 					   NVIF_MEM_COMP |
307 					   NVIF_MEM_DISP);
308 		if (typei < 0)
309 			return -ENOSYS;
310 
311 		drm->ttm.type_vram = typei;
312 	} else {
313 		drm->ttm.type_vram = -1;
314 	}
315 
316 	if (pci && pci->agp.bridge) {
317 		drm->agp.bridge = pci->agp.bridge;
318 		drm->agp.base = pci->agp.base;
319 		drm->agp.size = pci->agp.size;
320 		drm->agp.cma = pci->agp.cma;
321 	}
322 
323 #if IS_ENABLED(CONFIG_SWIOTLB) && IS_ENABLED(CONFIG_X86)
324 	need_swiotlb = !!swiotlb_nr_tbl();
325 #endif
326 
327 	ret = ttm_bo_device_init(&drm->ttm.bdev, &nouveau_bo_driver,
328 				 drm->dev->dev, dev->anon_inode->i_mapping,
329 				 dev->vma_offset_manager, need_swiotlb,
330 				 drm->client.mmu.dmabits <= 32);
331 	if (ret) {
332 		NV_ERROR(drm, "error initialising bo driver, %d\n", ret);
333 		return ret;
334 	}
335 
336 	/* VRAM init */
337 	drm->gem.vram_available = drm->client.device.info.ram_user;
338 
339 	arch_io_reserve_memtype_wc(device->func->resource_addr(device, 1),
340 				   device->func->resource_size(device, 1));
341 
342 	ret = nouveau_ttm_init_vram(drm);
343 	if (ret) {
344 		NV_ERROR(drm, "VRAM mm init failed, %d\n", ret);
345 		return ret;
346 	}
347 
348 	drm->ttm.mtrr = arch_phys_wc_add(device->func->resource_addr(device, 1),
349 					 device->func->resource_size(device, 1));
350 
351 	/* GART init */
352 	if (!drm->agp.bridge) {
353 		drm->gem.gart_available = drm->client.vmm.vmm.limit;
354 	} else {
355 		drm->gem.gart_available = drm->agp.size;
356 	}
357 
358 	ret = nouveau_ttm_init_gtt(drm);
359 	if (ret) {
360 		NV_ERROR(drm, "GART mm init failed, %d\n", ret);
361 		return ret;
362 	}
363 
364 	mutex_init(&drm->ttm.io_reserve_mutex);
365 	INIT_LIST_HEAD(&drm->ttm.io_reserve_lru);
366 
367 	NV_INFO(drm, "VRAM: %d MiB\n", (u32)(drm->gem.vram_available >> 20));
368 	NV_INFO(drm, "GART: %d MiB\n", (u32)(drm->gem.gart_available >> 20));
369 	return 0;
370 }
371 
372 void
373 nouveau_ttm_fini(struct nouveau_drm *drm)
374 {
375 	struct nvkm_device *device = nvxx_device(&drm->client.device);
376 
377 	nouveau_ttm_fini_vram(drm);
378 	nouveau_ttm_fini_gtt(drm);
379 
380 	ttm_bo_device_release(&drm->ttm.bdev);
381 
382 	arch_phys_wc_del(drm->ttm.mtrr);
383 	drm->ttm.mtrr = 0;
384 	arch_io_free_memtype_wc(device->func->resource_addr(device, 1),
385 				device->func->resource_size(device, 1));
386 
387 }
388