1 /*
2  * Copyright 2017 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  */
22 #include "vmm.h"
23 
24 #include <subdev/fb.h>
25 #include <subdev/timer.h>
26 #include <engine/gr.h>
27 
28 #include <nvif/if500d.h>
29 #include <nvif/unpack.h>
30 
31 static inline void
32 nv50_vmm_pgt_pte(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
33 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
34 {
35 	u64 next = addr + map->type, data;
36 	u32 pten;
37 	int log2blk;
38 
39 	map->type += ptes * map->ctag;
40 
41 	while (ptes) {
42 		for (log2blk = 7; log2blk >= 0; log2blk--) {
43 			pten = 1 << log2blk;
44 			if (ptes >= pten && IS_ALIGNED(ptei, pten))
45 				break;
46 		}
47 
48 		data  = next | (log2blk << 7);
49 		next += pten * map->next;
50 		ptes -= pten;
51 
52 		while (pten--)
53 			VMM_WO064(pt, vmm, ptei++ * 8, data);
54 	}
55 }
56 
57 static void
58 nv50_vmm_pgt_sgl(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
59 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
60 {
61 	VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv50_vmm_pgt_pte);
62 }
63 
64 static void
65 nv50_vmm_pgt_dma(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
66 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
67 {
68 	if (map->page->shift == PAGE_SHIFT) {
69 		VMM_SPAM(vmm, "DMAA %08x %08x PTE(s)", ptei, ptes);
70 		nvkm_kmap(pt->memory);
71 		while (ptes--) {
72 			const u64 data = *map->dma++ + map->type;
73 			VMM_WO064(pt, vmm, ptei++ * 8, data);
74 			map->type += map->ctag;
75 		}
76 		nvkm_done(pt->memory);
77 		return;
78 	}
79 
80 	VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv50_vmm_pgt_pte);
81 }
82 
83 static void
84 nv50_vmm_pgt_mem(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
85 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
86 {
87 	VMM_MAP_ITER_MEM(vmm, pt, ptei, ptes, map, nv50_vmm_pgt_pte);
88 }
89 
90 static void
91 nv50_vmm_pgt_unmap(struct nvkm_vmm *vmm,
92 		   struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
93 {
94 	VMM_FO064(pt, vmm, ptei * 8, 0ULL, ptes);
95 }
96 
97 static const struct nvkm_vmm_desc_func
98 nv50_vmm_pgt = {
99 	.unmap = nv50_vmm_pgt_unmap,
100 	.mem = nv50_vmm_pgt_mem,
101 	.dma = nv50_vmm_pgt_dma,
102 	.sgl = nv50_vmm_pgt_sgl,
103 };
104 
105 static bool
106 nv50_vmm_pde(struct nvkm_vmm *vmm, struct nvkm_vmm_pt *pgt, u64 *pdata)
107 {
108 	struct nvkm_mmu_pt *pt;
109 	u64 data = 0xdeadcafe00000000ULL;
110 	if (pgt && (pt = pgt->pt[0])) {
111 		switch (pgt->page) {
112 		case 16: data = 0x00000001; break;
113 		case 12: data = 0x00000003;
114 			switch (nvkm_memory_size(pt->memory)) {
115 			case 0x100000: data |= 0x00000000; break;
116 			case 0x040000: data |= 0x00000020; break;
117 			case 0x020000: data |= 0x00000040; break;
118 			case 0x010000: data |= 0x00000060; break;
119 			default:
120 				WARN_ON(1);
121 				return false;
122 			}
123 			break;
124 		default:
125 			WARN_ON(1);
126 			return false;
127 		}
128 
129 		switch (nvkm_memory_target(pt->memory)) {
130 		case NVKM_MEM_TARGET_VRAM: data |= 0x00000000; break;
131 		case NVKM_MEM_TARGET_HOST: data |= 0x00000008; break;
132 		case NVKM_MEM_TARGET_NCOH: data |= 0x0000000c; break;
133 		default:
134 			WARN_ON(1);
135 			return false;
136 		}
137 
138 		data |= pt->addr;
139 	}
140 	*pdata = data;
141 	return true;
142 }
143 
144 static void
145 nv50_vmm_pgd_pde(struct nvkm_vmm *vmm, struct nvkm_vmm_pt *pgd, u32 pdei)
146 {
147 	struct nvkm_vmm_join *join;
148 	u32 pdeo = vmm->mmu->func->vmm.pd_offset + (pdei * 8);
149 	u64 data;
150 
151 	if (!nv50_vmm_pde(vmm, pgd->pde[pdei], &data))
152 		return;
153 
154 	list_for_each_entry(join, &vmm->join, head) {
155 		nvkm_kmap(join->inst);
156 		nvkm_wo64(join->inst, pdeo, data);
157 		nvkm_done(join->inst);
158 	}
159 }
160 
161 static const struct nvkm_vmm_desc_func
162 nv50_vmm_pgd = {
163 	.pde = nv50_vmm_pgd_pde,
164 };
165 
166 const struct nvkm_vmm_desc
167 nv50_vmm_desc_12[] = {
168 	{ PGT, 17, 8, 0x1000, &nv50_vmm_pgt },
169 	{ PGD, 11, 0, 0x0000, &nv50_vmm_pgd },
170 	{}
171 };
172 
173 const struct nvkm_vmm_desc
174 nv50_vmm_desc_16[] = {
175 	{ PGT, 13, 8, 0x1000, &nv50_vmm_pgt },
176 	{ PGD, 11, 0, 0x0000, &nv50_vmm_pgd },
177 	{}
178 };
179 
180 void
181 nv50_vmm_flush(struct nvkm_vmm *vmm, int level)
182 {
183 	struct nvkm_subdev *subdev = &vmm->mmu->subdev;
184 	struct nvkm_device *device = subdev->device;
185 	int i, id;
186 
187 	mutex_lock(&vmm->mmu->mutex);
188 	for (i = 0; i < NVKM_SUBDEV_NR; i++) {
189 		if (!atomic_read(&vmm->engref[i]))
190 			continue;
191 
192 		/* unfortunate hw bug workaround... */
193 		if (i == NVKM_ENGINE_GR && device->gr) {
194 			int ret = nvkm_gr_tlb_flush(device->gr);
195 			if (ret != -ENODEV)
196 				continue;
197 		}
198 
199 		switch (i) {
200 		case NVKM_ENGINE_GR    : id = 0x00; break;
201 		case NVKM_ENGINE_VP    :
202 		case NVKM_ENGINE_MSPDEC: id = 0x01; break;
203 		case NVKM_SUBDEV_BAR   : id = 0x06; break;
204 		case NVKM_ENGINE_MSPPP :
205 		case NVKM_ENGINE_MPEG  : id = 0x08; break;
206 		case NVKM_ENGINE_BSP   :
207 		case NVKM_ENGINE_MSVLD : id = 0x09; break;
208 		case NVKM_ENGINE_CIPHER:
209 		case NVKM_ENGINE_SEC   : id = 0x0a; break;
210 		case NVKM_ENGINE_CE    : id = 0x0d; break;
211 		default:
212 			continue;
213 		}
214 
215 		nvkm_wr32(device, 0x100c80, (id << 16) | 1);
216 		if (nvkm_msec(device, 2000,
217 			if (!(nvkm_rd32(device, 0x100c80) & 0x00000001))
218 				break;
219 		) < 0)
220 			nvkm_error(subdev, "%s mmu invalidate timeout\n", nvkm_subdev_type[i]);
221 	}
222 	mutex_unlock(&vmm->mmu->mutex);
223 }
224 
225 int
226 nv50_vmm_valid(struct nvkm_vmm *vmm, void *argv, u32 argc,
227 	       struct nvkm_vmm_map *map)
228 {
229 	const struct nvkm_vmm_page *page = map->page;
230 	union {
231 		struct nv50_vmm_map_vn vn;
232 		struct nv50_vmm_map_v0 v0;
233 	} *args = argv;
234 	struct nvkm_device *device = vmm->mmu->subdev.device;
235 	struct nvkm_ram *ram = device->fb->ram;
236 	struct nvkm_memory *memory = map->memory;
237 	u8  aper, kind, kind_inv, comp, priv, ro;
238 	int kindn, ret = -ENOSYS;
239 	const u8 *kindm;
240 
241 	map->type = map->ctag = 0;
242 	map->next = 1 << page->shift;
243 
244 	if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
245 		ro   = !!args->v0.ro;
246 		priv = !!args->v0.priv;
247 		kind = args->v0.kind & 0x7f;
248 		comp = args->v0.comp & 0x03;
249 	} else
250 	if (!(ret = nvif_unvers(ret, &argv, &argc, args->vn))) {
251 		ro   = 0;
252 		priv = 0;
253 		kind = 0x00;
254 		comp = 0;
255 	} else {
256 		VMM_DEBUG(vmm, "args");
257 		return ret;
258 	}
259 
260 	switch (nvkm_memory_target(memory)) {
261 	case NVKM_MEM_TARGET_VRAM:
262 		if (ram->stolen) {
263 			map->type |= ram->stolen;
264 			aper = 3;
265 		} else {
266 			aper = 0;
267 		}
268 		break;
269 	case NVKM_MEM_TARGET_HOST:
270 		aper = 2;
271 		break;
272 	case NVKM_MEM_TARGET_NCOH:
273 		aper = 3;
274 		break;
275 	default:
276 		WARN_ON(1);
277 		return -EINVAL;
278 	}
279 
280 	kindm = vmm->mmu->func->kind(vmm->mmu, &kindn, &kind_inv);
281 	if (kind >= kindn || kindm[kind] == kind_inv) {
282 		VMM_DEBUG(vmm, "kind %02x", kind);
283 		return -EINVAL;
284 	}
285 
286 	if (map->mem && map->mem->type != kindm[kind]) {
287 		VMM_DEBUG(vmm, "kind %02x bankswz: %d %d", kind,
288 			  kindm[kind], map->mem->type);
289 		return -EINVAL;
290 	}
291 
292 	if (comp) {
293 		u32 tags = (nvkm_memory_size(memory) >> 16) * comp;
294 		if (aper != 0 || !(page->type & NVKM_VMM_PAGE_COMP)) {
295 			VMM_DEBUG(vmm, "comp %d %02x", aper, page->type);
296 			return -EINVAL;
297 		}
298 
299 		if (!map->no_comp) {
300 			ret = nvkm_memory_tags_get(memory, device, tags, NULL,
301 						   &map->tags);
302 			if (ret) {
303 				VMM_DEBUG(vmm, "comp %d", ret);
304 				return ret;
305 			}
306 
307 			if (map->tags->mn) {
308 				u32 tags = map->tags->mn->offset +
309 					   (map->offset >> 16);
310 				map->ctag |= (u64)comp << 49;
311 				map->type |= (u64)comp << 47;
312 				map->type |= (u64)tags << 49;
313 				map->next |= map->ctag;
314 			}
315 		}
316 	}
317 
318 	map->type |= BIT(0); /* Valid. */
319 	map->type |= (u64)ro << 3;
320 	map->type |= (u64)aper << 4;
321 	map->type |= (u64)priv << 6;
322 	map->type |= (u64)kind << 40;
323 	return 0;
324 }
325 
326 void
327 nv50_vmm_part(struct nvkm_vmm *vmm, struct nvkm_memory *inst)
328 {
329 	struct nvkm_vmm_join *join;
330 
331 	list_for_each_entry(join, &vmm->join, head) {
332 		if (join->inst == inst) {
333 			list_del(&join->head);
334 			kfree(join);
335 			break;
336 		}
337 	}
338 }
339 
340 int
341 nv50_vmm_join(struct nvkm_vmm *vmm, struct nvkm_memory *inst)
342 {
343 	const u32 pd_offset = vmm->mmu->func->vmm.pd_offset;
344 	struct nvkm_vmm_join *join;
345 	int ret = 0;
346 	u64 data;
347 	u32 pdei;
348 
349 	if (!(join = kmalloc(sizeof(*join), GFP_KERNEL)))
350 		return -ENOMEM;
351 	join->inst = inst;
352 	list_add_tail(&join->head, &vmm->join);
353 
354 	nvkm_kmap(join->inst);
355 	for (pdei = vmm->start >> 29; pdei <= (vmm->limit - 1) >> 29; pdei++) {
356 		if (!nv50_vmm_pde(vmm, vmm->pd->pde[pdei], &data)) {
357 			ret = -EINVAL;
358 			break;
359 		}
360 		nvkm_wo64(join->inst, pd_offset + (pdei * 8), data);
361 	}
362 	nvkm_done(join->inst);
363 	return ret;
364 }
365 
366 static const struct nvkm_vmm_func
367 nv50_vmm = {
368 	.join = nv50_vmm_join,
369 	.part = nv50_vmm_part,
370 	.valid = nv50_vmm_valid,
371 	.flush = nv50_vmm_flush,
372 	.page_block = 1 << 29,
373 	.page = {
374 		{ 16, &nv50_vmm_desc_16[0], NVKM_VMM_PAGE_xVxC },
375 		{ 12, &nv50_vmm_desc_12[0], NVKM_VMM_PAGE_xVHx },
376 		{}
377 	}
378 };
379 
380 int
381 nv50_vmm_new(struct nvkm_mmu *mmu, bool managed, u64 addr, u64 size,
382 	     void *argv, u32 argc, struct lock_class_key *key, const char *name,
383 	     struct nvkm_vmm **pvmm)
384 {
385 	return nv04_vmm_new_(&nv50_vmm, mmu, 0, managed, addr, size,
386 			     argv, argc, key, name, pvmm);
387 }
388