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
31static inline void
32nv50_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
57static void
58nv50_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
64static void
65nv50_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
83static void
84nv50_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
90static void
91nv50_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
97static const struct nvkm_vmm_desc_func
98nv50_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
105static bool
106nv50_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
144static void
145nv50_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
161static const struct nvkm_vmm_desc_func
162nv50_vmm_pgd = {
163	.pde = nv50_vmm_pgd_pde,
164};
165
166const struct nvkm_vmm_desc
167nv50_vmm_desc_12[] = {
168	{ PGT, 17, 8, 0x1000, &nv50_vmm_pgt },
169	{ PGD, 11, 0, 0x0000, &nv50_vmm_pgd },
170	{}
171};
172
173const struct nvkm_vmm_desc
174nv50_vmm_desc_16[] = {
175	{ PGT, 13, 8, 0x1000, &nv50_vmm_pgt },
176	{ PGD, 11, 0, 0x0000, &nv50_vmm_pgd },
177	{}
178};
179
180void
181nv50_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
225int
226nv50_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
326void
327nv50_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
340int
341nv50_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
366static const struct nvkm_vmm_func
367nv50_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
380int
381nv50_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