Commit | Line | Data |
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f30437c5 JS |
1 | /* |
2 | * KVMGT - the implementation of Intel mediated pass-through framework for KVM | |
3 | * | |
4 | * Copyright(c) 2014-2016 Intel Corporation. All rights reserved. | |
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, sublicense, | |
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 next | |
14 | * paragraph) shall be included in all copies or substantial portions of the | |
15 | * 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 NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
23 | * SOFTWARE. | |
24 | * | |
25 | * Authors: | |
26 | * Kevin Tian <kevin.tian@intel.com> | |
27 | * Jike Song <jike.song@intel.com> | |
28 | * Xiaoguang Chen <xiaoguang.chen@intel.com> | |
29 | */ | |
30 | ||
31 | #include <linux/init.h> | |
32 | #include <linux/device.h> | |
33 | #include <linux/mm.h> | |
f440c8a5 | 34 | #include <linux/mmu_context.h> |
f30437c5 JS |
35 | #include <linux/types.h> |
36 | #include <linux/list.h> | |
37 | #include <linux/rbtree.h> | |
38 | #include <linux/spinlock.h> | |
39 | #include <linux/eventfd.h> | |
40 | #include <linux/uuid.h> | |
41 | #include <linux/kvm_host.h> | |
42 | #include <linux/vfio.h> | |
659643f7 | 43 | #include <linux/mdev.h> |
f30437c5 JS |
44 | |
45 | #include "i915_drv.h" | |
46 | #include "gvt.h" | |
47 | ||
f30437c5 JS |
48 | static const struct intel_gvt_ops *intel_gvt_ops; |
49 | ||
f30437c5 JS |
50 | /* helper macros copied from vfio-pci */ |
51 | #define VFIO_PCI_OFFSET_SHIFT 40 | |
52 | #define VFIO_PCI_OFFSET_TO_INDEX(off) (off >> VFIO_PCI_OFFSET_SHIFT) | |
53 | #define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT) | |
54 | #define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1) | |
55 | ||
b851adea TZ |
56 | #define OPREGION_SIGNATURE "IntelGraphicsMem" |
57 | ||
58 | struct vfio_region; | |
59 | struct intel_vgpu_regops { | |
60 | size_t (*rw)(struct intel_vgpu *vgpu, char *buf, | |
61 | size_t count, loff_t *ppos, bool iswrite); | |
62 | void (*release)(struct intel_vgpu *vgpu, | |
63 | struct vfio_region *region); | |
64 | }; | |
65 | ||
f30437c5 JS |
66 | struct vfio_region { |
67 | u32 type; | |
68 | u32 subtype; | |
69 | size_t size; | |
70 | u32 flags; | |
b851adea TZ |
71 | const struct intel_vgpu_regops *ops; |
72 | void *data; | |
f30437c5 JS |
73 | }; |
74 | ||
75 | struct kvmgt_pgfn { | |
76 | gfn_t gfn; | |
77 | struct hlist_node hnode; | |
78 | }; | |
79 | ||
80 | struct kvmgt_guest_info { | |
81 | struct kvm *kvm; | |
82 | struct intel_vgpu *vgpu; | |
83 | struct kvm_page_track_notifier_node track_node; | |
84 | #define NR_BKT (1 << 18) | |
85 | struct hlist_head ptable[NR_BKT]; | |
86 | #undef NR_BKT | |
87 | }; | |
88 | ||
89 | struct gvt_dma { | |
90 | struct rb_node node; | |
91 | gfn_t gfn; | |
b86dc6ed | 92 | unsigned long iova; |
f30437c5 JS |
93 | }; |
94 | ||
659643f7 JS |
95 | static inline bool handle_valid(unsigned long handle) |
96 | { | |
97 | return !!(handle & ~0xff); | |
98 | } | |
99 | ||
100 | static int kvmgt_guest_init(struct mdev_device *mdev); | |
101 | static void intel_vgpu_release_work(struct work_struct *work); | |
102 | static bool kvmgt_guest_exit(struct kvmgt_guest_info *info); | |
103 | ||
b86dc6ed CD |
104 | static int gvt_dma_map_iova(struct intel_vgpu *vgpu, kvm_pfn_t pfn, |
105 | unsigned long *iova) | |
106 | { | |
107 | struct page *page; | |
108 | struct device *dev = &vgpu->gvt->dev_priv->drm.pdev->dev; | |
109 | dma_addr_t daddr; | |
110 | ||
b6b6fbc8 | 111 | if (unlikely(!pfn_valid(pfn))) |
b86dc6ed CD |
112 | return -EFAULT; |
113 | ||
b6b6fbc8 | 114 | page = pfn_to_page(pfn); |
b86dc6ed CD |
115 | daddr = dma_map_page(dev, page, 0, PAGE_SIZE, |
116 | PCI_DMA_BIDIRECTIONAL); | |
117 | if (dma_mapping_error(dev, daddr)) | |
118 | return -ENOMEM; | |
119 | ||
120 | *iova = (unsigned long)(daddr >> PAGE_SHIFT); | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static void gvt_dma_unmap_iova(struct intel_vgpu *vgpu, unsigned long iova) | |
125 | { | |
126 | struct device *dev = &vgpu->gvt->dev_priv->drm.pdev->dev; | |
127 | dma_addr_t daddr; | |
128 | ||
129 | daddr = (dma_addr_t)(iova << PAGE_SHIFT); | |
130 | dma_unmap_page(dev, daddr, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); | |
131 | } | |
132 | ||
f30437c5 JS |
133 | static struct gvt_dma *__gvt_cache_find(struct intel_vgpu *vgpu, gfn_t gfn) |
134 | { | |
135 | struct rb_node *node = vgpu->vdev.cache.rb_node; | |
136 | struct gvt_dma *ret = NULL; | |
137 | ||
138 | while (node) { | |
139 | struct gvt_dma *itr = rb_entry(node, struct gvt_dma, node); | |
140 | ||
141 | if (gfn < itr->gfn) | |
142 | node = node->rb_left; | |
143 | else if (gfn > itr->gfn) | |
144 | node = node->rb_right; | |
145 | else { | |
146 | ret = itr; | |
147 | goto out; | |
148 | } | |
149 | } | |
150 | ||
151 | out: | |
152 | return ret; | |
153 | } | |
154 | ||
b86dc6ed | 155 | static unsigned long gvt_cache_find(struct intel_vgpu *vgpu, gfn_t gfn) |
f30437c5 JS |
156 | { |
157 | struct gvt_dma *entry; | |
b86dc6ed | 158 | unsigned long iova; |
f30437c5 JS |
159 | |
160 | mutex_lock(&vgpu->vdev.cache_lock); | |
bfeca3e5 | 161 | |
f30437c5 | 162 | entry = __gvt_cache_find(vgpu, gfn); |
b86dc6ed | 163 | iova = (entry == NULL) ? INTEL_GVT_INVALID_ADDR : entry->iova; |
f30437c5 | 164 | |
bfeca3e5 | 165 | mutex_unlock(&vgpu->vdev.cache_lock); |
b86dc6ed | 166 | return iova; |
f30437c5 JS |
167 | } |
168 | ||
b86dc6ed CD |
169 | static void gvt_cache_add(struct intel_vgpu *vgpu, gfn_t gfn, |
170 | unsigned long iova) | |
f30437c5 JS |
171 | { |
172 | struct gvt_dma *new, *itr; | |
173 | struct rb_node **link = &vgpu->vdev.cache.rb_node, *parent = NULL; | |
174 | ||
175 | new = kzalloc(sizeof(struct gvt_dma), GFP_KERNEL); | |
176 | if (!new) | |
177 | return; | |
178 | ||
179 | new->gfn = gfn; | |
b86dc6ed | 180 | new->iova = iova; |
f30437c5 JS |
181 | |
182 | mutex_lock(&vgpu->vdev.cache_lock); | |
183 | while (*link) { | |
184 | parent = *link; | |
185 | itr = rb_entry(parent, struct gvt_dma, node); | |
186 | ||
187 | if (gfn == itr->gfn) | |
188 | goto out; | |
189 | else if (gfn < itr->gfn) | |
190 | link = &parent->rb_left; | |
191 | else | |
192 | link = &parent->rb_right; | |
193 | } | |
194 | ||
195 | rb_link_node(&new->node, parent, link); | |
196 | rb_insert_color(&new->node, &vgpu->vdev.cache); | |
197 | mutex_unlock(&vgpu->vdev.cache_lock); | |
198 | return; | |
199 | ||
200 | out: | |
201 | mutex_unlock(&vgpu->vdev.cache_lock); | |
202 | kfree(new); | |
203 | } | |
204 | ||
205 | static void __gvt_cache_remove_entry(struct intel_vgpu *vgpu, | |
206 | struct gvt_dma *entry) | |
207 | { | |
208 | rb_erase(&entry->node, &vgpu->vdev.cache); | |
209 | kfree(entry); | |
210 | } | |
211 | ||
08673c3e | 212 | static void gvt_cache_remove(struct intel_vgpu *vgpu, gfn_t gfn) |
f30437c5 | 213 | { |
99e3123e | 214 | struct device *dev = mdev_dev(vgpu->vdev.mdev); |
f30437c5 | 215 | struct gvt_dma *this; |
08673c3e CD |
216 | unsigned long g1; |
217 | int rc; | |
f30437c5 JS |
218 | |
219 | mutex_lock(&vgpu->vdev.cache_lock); | |
220 | this = __gvt_cache_find(vgpu, gfn); | |
221 | if (!this) { | |
222 | mutex_unlock(&vgpu->vdev.cache_lock); | |
08673c3e | 223 | return; |
f30437c5 | 224 | } |
08673c3e CD |
225 | |
226 | g1 = gfn; | |
b86dc6ed | 227 | gvt_dma_unmap_iova(vgpu, this->iova); |
08673c3e CD |
228 | rc = vfio_unpin_pages(dev, &g1, 1); |
229 | WARN_ON(rc != 1); | |
230 | __gvt_cache_remove_entry(vgpu, this); | |
f30437c5 JS |
231 | mutex_unlock(&vgpu->vdev.cache_lock); |
232 | } | |
233 | ||
234 | static void gvt_cache_init(struct intel_vgpu *vgpu) | |
235 | { | |
236 | vgpu->vdev.cache = RB_ROOT; | |
237 | mutex_init(&vgpu->vdev.cache_lock); | |
238 | } | |
239 | ||
240 | static void gvt_cache_destroy(struct intel_vgpu *vgpu) | |
241 | { | |
242 | struct gvt_dma *dma; | |
243 | struct rb_node *node = NULL; | |
99e3123e | 244 | struct device *dev = mdev_dev(vgpu->vdev.mdev); |
659643f7 | 245 | unsigned long gfn; |
f30437c5 | 246 | |
f16bd3dd CD |
247 | for (;;) { |
248 | mutex_lock(&vgpu->vdev.cache_lock); | |
249 | node = rb_first(&vgpu->vdev.cache); | |
250 | if (!node) { | |
251 | mutex_unlock(&vgpu->vdev.cache_lock); | |
252 | break; | |
253 | } | |
f30437c5 | 254 | dma = rb_entry(node, struct gvt_dma, node); |
b86dc6ed | 255 | gvt_dma_unmap_iova(vgpu, dma->iova); |
659643f7 | 256 | gfn = dma->gfn; |
f30437c5 | 257 | __gvt_cache_remove_entry(vgpu, dma); |
f16bd3dd CD |
258 | mutex_unlock(&vgpu->vdev.cache_lock); |
259 | vfio_unpin_pages(dev, &gfn, 1); | |
f30437c5 | 260 | } |
f30437c5 JS |
261 | } |
262 | ||
f30437c5 JS |
263 | static void kvmgt_protect_table_init(struct kvmgt_guest_info *info) |
264 | { | |
265 | hash_init(info->ptable); | |
266 | } | |
267 | ||
268 | static void kvmgt_protect_table_destroy(struct kvmgt_guest_info *info) | |
269 | { | |
270 | struct kvmgt_pgfn *p; | |
271 | struct hlist_node *tmp; | |
272 | int i; | |
273 | ||
274 | hash_for_each_safe(info->ptable, i, tmp, p, hnode) { | |
275 | hash_del(&p->hnode); | |
276 | kfree(p); | |
277 | } | |
278 | } | |
279 | ||
280 | static struct kvmgt_pgfn * | |
281 | __kvmgt_protect_table_find(struct kvmgt_guest_info *info, gfn_t gfn) | |
282 | { | |
283 | struct kvmgt_pgfn *p, *res = NULL; | |
284 | ||
285 | hash_for_each_possible(info->ptable, p, hnode, gfn) { | |
286 | if (gfn == p->gfn) { | |
287 | res = p; | |
288 | break; | |
289 | } | |
290 | } | |
291 | ||
292 | return res; | |
293 | } | |
294 | ||
295 | static bool kvmgt_gfn_is_write_protected(struct kvmgt_guest_info *info, | |
296 | gfn_t gfn) | |
297 | { | |
298 | struct kvmgt_pgfn *p; | |
299 | ||
300 | p = __kvmgt_protect_table_find(info, gfn); | |
301 | return !!p; | |
302 | } | |
303 | ||
304 | static void kvmgt_protect_table_add(struct kvmgt_guest_info *info, gfn_t gfn) | |
305 | { | |
306 | struct kvmgt_pgfn *p; | |
307 | ||
308 | if (kvmgt_gfn_is_write_protected(info, gfn)) | |
309 | return; | |
310 | ||
c55b1de0 | 311 | p = kzalloc(sizeof(struct kvmgt_pgfn), GFP_ATOMIC); |
f30437c5 JS |
312 | if (WARN(!p, "gfn: 0x%llx\n", gfn)) |
313 | return; | |
314 | ||
315 | p->gfn = gfn; | |
316 | hash_add(info->ptable, &p->hnode, gfn); | |
317 | } | |
318 | ||
319 | static void kvmgt_protect_table_del(struct kvmgt_guest_info *info, | |
320 | gfn_t gfn) | |
321 | { | |
322 | struct kvmgt_pgfn *p; | |
323 | ||
324 | p = __kvmgt_protect_table_find(info, gfn); | |
325 | if (p) { | |
326 | hash_del(&p->hnode); | |
327 | kfree(p); | |
328 | } | |
329 | } | |
330 | ||
b851adea TZ |
331 | static size_t intel_vgpu_reg_rw_opregion(struct intel_vgpu *vgpu, char *buf, |
332 | size_t count, loff_t *ppos, bool iswrite) | |
333 | { | |
334 | unsigned int i = VFIO_PCI_OFFSET_TO_INDEX(*ppos) - | |
335 | VFIO_PCI_NUM_REGIONS; | |
336 | void *base = vgpu->vdev.region[i].data; | |
337 | loff_t pos = *ppos & VFIO_PCI_OFFSET_MASK; | |
338 | ||
339 | if (pos >= vgpu->vdev.region[i].size || iswrite) { | |
340 | gvt_vgpu_err("invalid op or offset for Intel vgpu OpRegion\n"); | |
341 | return -EINVAL; | |
342 | } | |
343 | count = min(count, (size_t)(vgpu->vdev.region[i].size - pos)); | |
344 | memcpy(buf, base + pos, count); | |
345 | ||
346 | return count; | |
347 | } | |
348 | ||
349 | static void intel_vgpu_reg_release_opregion(struct intel_vgpu *vgpu, | |
350 | struct vfio_region *region) | |
351 | { | |
352 | } | |
353 | ||
354 | static const struct intel_vgpu_regops intel_vgpu_regops_opregion = { | |
355 | .rw = intel_vgpu_reg_rw_opregion, | |
356 | .release = intel_vgpu_reg_release_opregion, | |
357 | }; | |
358 | ||
359 | static int intel_vgpu_register_reg(struct intel_vgpu *vgpu, | |
360 | unsigned int type, unsigned int subtype, | |
361 | const struct intel_vgpu_regops *ops, | |
362 | size_t size, u32 flags, void *data) | |
363 | { | |
364 | struct vfio_region *region; | |
365 | ||
366 | region = krealloc(vgpu->vdev.region, | |
367 | (vgpu->vdev.num_regions + 1) * sizeof(*region), | |
368 | GFP_KERNEL); | |
369 | if (!region) | |
370 | return -ENOMEM; | |
371 | ||
372 | vgpu->vdev.region = region; | |
373 | vgpu->vdev.region[vgpu->vdev.num_regions].type = type; | |
374 | vgpu->vdev.region[vgpu->vdev.num_regions].subtype = subtype; | |
375 | vgpu->vdev.region[vgpu->vdev.num_regions].ops = ops; | |
376 | vgpu->vdev.region[vgpu->vdev.num_regions].size = size; | |
377 | vgpu->vdev.region[vgpu->vdev.num_regions].flags = flags; | |
378 | vgpu->vdev.region[vgpu->vdev.num_regions].data = data; | |
379 | vgpu->vdev.num_regions++; | |
e546e281 TZ |
380 | return 0; |
381 | } | |
382 | ||
383 | static int kvmgt_get_vfio_device(void *p_vgpu) | |
384 | { | |
385 | struct intel_vgpu *vgpu = (struct intel_vgpu *)p_vgpu; | |
b851adea | 386 | |
e546e281 TZ |
387 | vgpu->vdev.vfio_device = vfio_device_get_from_dev( |
388 | mdev_dev(vgpu->vdev.mdev)); | |
389 | if (!vgpu->vdev.vfio_device) { | |
390 | gvt_vgpu_err("failed to get vfio device\n"); | |
391 | return -ENODEV; | |
392 | } | |
b851adea TZ |
393 | return 0; |
394 | } | |
395 | ||
e546e281 | 396 | |
b851adea TZ |
397 | static int kvmgt_set_opregion(void *p_vgpu) |
398 | { | |
399 | struct intel_vgpu *vgpu = (struct intel_vgpu *)p_vgpu; | |
400 | void *base; | |
401 | int ret; | |
402 | ||
403 | /* Each vgpu has its own opregion, although VFIO would create another | |
404 | * one later. This one is used to expose opregion to VFIO. And the | |
405 | * other one created by VFIO later, is used by guest actually. | |
406 | */ | |
407 | base = vgpu_opregion(vgpu)->va; | |
408 | if (!base) | |
409 | return -ENOMEM; | |
410 | ||
411 | if (memcmp(base, OPREGION_SIGNATURE, 16)) { | |
412 | memunmap(base); | |
413 | return -EINVAL; | |
414 | } | |
415 | ||
416 | ret = intel_vgpu_register_reg(vgpu, | |
417 | PCI_VENDOR_ID_INTEL | VFIO_REGION_TYPE_PCI_VENDOR_TYPE, | |
418 | VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION, | |
419 | &intel_vgpu_regops_opregion, OPREGION_SIZE, | |
420 | VFIO_REGION_INFO_FLAG_READ, base); | |
421 | ||
422 | return ret; | |
423 | } | |
424 | ||
e546e281 TZ |
425 | static void kvmgt_put_vfio_device(void *vgpu) |
426 | { | |
427 | if (WARN_ON(!((struct intel_vgpu *)vgpu)->vdev.vfio_device)) | |
428 | return; | |
429 | ||
430 | vfio_device_put(((struct intel_vgpu *)vgpu)->vdev.vfio_device); | |
431 | } | |
432 | ||
659643f7 JS |
433 | static int intel_vgpu_create(struct kobject *kobj, struct mdev_device *mdev) |
434 | { | |
695fbc08 | 435 | struct intel_vgpu *vgpu = NULL; |
659643f7 JS |
436 | struct intel_vgpu_type *type; |
437 | struct device *pdev; | |
438 | void *gvt; | |
5753394b | 439 | int ret; |
659643f7 | 440 | |
9372e6fe | 441 | pdev = mdev_parent_dev(mdev); |
659643f7 JS |
442 | gvt = kdev_to_i915(pdev)->gvt; |
443 | ||
6aa23ced | 444 | type = intel_gvt_ops->gvt_find_vgpu_type(gvt, kobject_name(kobj)); |
659643f7 | 445 | if (!type) { |
695fbc08 | 446 | gvt_vgpu_err("failed to find type %s to create\n", |
659643f7 | 447 | kobject_name(kobj)); |
5753394b JS |
448 | ret = -EINVAL; |
449 | goto out; | |
659643f7 JS |
450 | } |
451 | ||
452 | vgpu = intel_gvt_ops->vgpu_create(gvt, type); | |
453 | if (IS_ERR_OR_NULL(vgpu)) { | |
5753394b | 454 | ret = vgpu == NULL ? -EFAULT : PTR_ERR(vgpu); |
695fbc08 | 455 | gvt_vgpu_err("failed to create intel vgpu: %d\n", ret); |
5753394b | 456 | goto out; |
659643f7 JS |
457 | } |
458 | ||
459 | INIT_WORK(&vgpu->vdev.release_work, intel_vgpu_release_work); | |
460 | ||
461 | vgpu->vdev.mdev = mdev; | |
462 | mdev_set_drvdata(mdev, vgpu); | |
463 | ||
464 | gvt_dbg_core("intel_vgpu_create succeeded for mdev: %s\n", | |
99e3123e | 465 | dev_name(mdev_dev(mdev))); |
5753394b JS |
466 | ret = 0; |
467 | ||
468 | out: | |
469 | return ret; | |
659643f7 JS |
470 | } |
471 | ||
472 | static int intel_vgpu_remove(struct mdev_device *mdev) | |
473 | { | |
474 | struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); | |
475 | ||
476 | if (handle_valid(vgpu->handle)) | |
477 | return -EBUSY; | |
478 | ||
479 | intel_gvt_ops->vgpu_destroy(vgpu); | |
480 | return 0; | |
481 | } | |
482 | ||
483 | static int intel_vgpu_iommu_notifier(struct notifier_block *nb, | |
484 | unsigned long action, void *data) | |
485 | { | |
486 | struct intel_vgpu *vgpu = container_of(nb, | |
487 | struct intel_vgpu, | |
488 | vdev.iommu_notifier); | |
489 | ||
490 | if (action == VFIO_IOMMU_NOTIFY_DMA_UNMAP) { | |
491 | struct vfio_iommu_type1_dma_unmap *unmap = data; | |
492 | unsigned long gfn, end_gfn; | |
493 | ||
494 | gfn = unmap->iova >> PAGE_SHIFT; | |
495 | end_gfn = gfn + unmap->size / PAGE_SIZE; | |
496 | ||
497 | while (gfn < end_gfn) | |
08673c3e | 498 | gvt_cache_remove(vgpu, gfn++); |
659643f7 JS |
499 | } |
500 | ||
501 | return NOTIFY_OK; | |
502 | } | |
503 | ||
504 | static int intel_vgpu_group_notifier(struct notifier_block *nb, | |
505 | unsigned long action, void *data) | |
506 | { | |
507 | struct intel_vgpu *vgpu = container_of(nb, | |
508 | struct intel_vgpu, | |
509 | vdev.group_notifier); | |
510 | ||
511 | /* the only action we care about */ | |
512 | if (action == VFIO_GROUP_NOTIFY_SET_KVM) { | |
513 | vgpu->vdev.kvm = data; | |
514 | ||
515 | if (!data) | |
516 | schedule_work(&vgpu->vdev.release_work); | |
517 | } | |
518 | ||
519 | return NOTIFY_OK; | |
520 | } | |
521 | ||
522 | static int intel_vgpu_open(struct mdev_device *mdev) | |
523 | { | |
524 | struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); | |
525 | unsigned long events; | |
526 | int ret; | |
527 | ||
528 | vgpu->vdev.iommu_notifier.notifier_call = intel_vgpu_iommu_notifier; | |
529 | vgpu->vdev.group_notifier.notifier_call = intel_vgpu_group_notifier; | |
530 | ||
531 | events = VFIO_IOMMU_NOTIFY_DMA_UNMAP; | |
99e3123e | 532 | ret = vfio_register_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY, &events, |
659643f7 JS |
533 | &vgpu->vdev.iommu_notifier); |
534 | if (ret != 0) { | |
695fbc08 TZ |
535 | gvt_vgpu_err("vfio_register_notifier for iommu failed: %d\n", |
536 | ret); | |
659643f7 JS |
537 | goto out; |
538 | } | |
539 | ||
540 | events = VFIO_GROUP_NOTIFY_SET_KVM; | |
99e3123e | 541 | ret = vfio_register_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, &events, |
659643f7 JS |
542 | &vgpu->vdev.group_notifier); |
543 | if (ret != 0) { | |
695fbc08 TZ |
544 | gvt_vgpu_err("vfio_register_notifier for group failed: %d\n", |
545 | ret); | |
659643f7 JS |
546 | goto undo_iommu; |
547 | } | |
548 | ||
364fb6b7 JS |
549 | ret = kvmgt_guest_init(mdev); |
550 | if (ret) | |
551 | goto undo_group; | |
552 | ||
b79c52ae ZW |
553 | intel_gvt_ops->vgpu_activate(vgpu); |
554 | ||
364fb6b7 JS |
555 | atomic_set(&vgpu->vdev.released, 0); |
556 | return ret; | |
557 | ||
558 | undo_group: | |
5824f924 | 559 | vfio_unregister_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, |
364fb6b7 | 560 | &vgpu->vdev.group_notifier); |
659643f7 JS |
561 | |
562 | undo_iommu: | |
99e3123e | 563 | vfio_unregister_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY, |
659643f7 JS |
564 | &vgpu->vdev.iommu_notifier); |
565 | out: | |
566 | return ret; | |
567 | } | |
568 | ||
569 | static void __intel_vgpu_release(struct intel_vgpu *vgpu) | |
570 | { | |
571 | struct kvmgt_guest_info *info; | |
364fb6b7 | 572 | int ret; |
659643f7 JS |
573 | |
574 | if (!handle_valid(vgpu->handle)) | |
575 | return; | |
576 | ||
364fb6b7 JS |
577 | if (atomic_cmpxchg(&vgpu->vdev.released, 0, 1)) |
578 | return; | |
579 | ||
b79c52ae ZW |
580 | intel_gvt_ops->vgpu_deactivate(vgpu); |
581 | ||
5824f924 | 582 | ret = vfio_unregister_notifier(mdev_dev(vgpu->vdev.mdev), VFIO_IOMMU_NOTIFY, |
659643f7 | 583 | &vgpu->vdev.iommu_notifier); |
364fb6b7 JS |
584 | WARN(ret, "vfio_unregister_notifier for iommu failed: %d\n", ret); |
585 | ||
5824f924 | 586 | ret = vfio_unregister_notifier(mdev_dev(vgpu->vdev.mdev), VFIO_GROUP_NOTIFY, |
659643f7 | 587 | &vgpu->vdev.group_notifier); |
364fb6b7 | 588 | WARN(ret, "vfio_unregister_notifier for group failed: %d\n", ret); |
659643f7 JS |
589 | |
590 | info = (struct kvmgt_guest_info *)vgpu->handle; | |
591 | kvmgt_guest_exit(info); | |
364fb6b7 JS |
592 | |
593 | vgpu->vdev.kvm = NULL; | |
659643f7 JS |
594 | vgpu->handle = 0; |
595 | } | |
596 | ||
597 | static void intel_vgpu_release(struct mdev_device *mdev) | |
598 | { | |
599 | struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); | |
600 | ||
601 | __intel_vgpu_release(vgpu); | |
602 | } | |
603 | ||
604 | static void intel_vgpu_release_work(struct work_struct *work) | |
605 | { | |
606 | struct intel_vgpu *vgpu = container_of(work, struct intel_vgpu, | |
607 | vdev.release_work); | |
8ff842fd | 608 | |
659643f7 JS |
609 | __intel_vgpu_release(vgpu); |
610 | } | |
611 | ||
f090a00d | 612 | static uint64_t intel_vgpu_get_bar_addr(struct intel_vgpu *vgpu, int bar) |
659643f7 JS |
613 | { |
614 | u32 start_lo, start_hi; | |
615 | u32 mem_type; | |
659643f7 | 616 | |
f090a00d | 617 | start_lo = (*(u32 *)(vgpu->cfg_space.virtual_cfg_space + bar)) & |
659643f7 | 618 | PCI_BASE_ADDRESS_MEM_MASK; |
f090a00d | 619 | mem_type = (*(u32 *)(vgpu->cfg_space.virtual_cfg_space + bar)) & |
659643f7 JS |
620 | PCI_BASE_ADDRESS_MEM_TYPE_MASK; |
621 | ||
622 | switch (mem_type) { | |
623 | case PCI_BASE_ADDRESS_MEM_TYPE_64: | |
624 | start_hi = (*(u32 *)(vgpu->cfg_space.virtual_cfg_space | |
f090a00d | 625 | + bar + 4)); |
659643f7 JS |
626 | break; |
627 | case PCI_BASE_ADDRESS_MEM_TYPE_32: | |
628 | case PCI_BASE_ADDRESS_MEM_TYPE_1M: | |
629 | /* 1M mem BAR treated as 32-bit BAR */ | |
630 | default: | |
631 | /* mem unknown type treated as 32-bit BAR */ | |
632 | start_hi = 0; | |
633 | break; | |
634 | } | |
635 | ||
636 | return ((u64)start_hi << 32) | start_lo; | |
637 | } | |
638 | ||
f090a00d CD |
639 | static int intel_vgpu_bar_rw(struct intel_vgpu *vgpu, int bar, uint64_t off, |
640 | void *buf, unsigned int count, bool is_write) | |
641 | { | |
642 | uint64_t bar_start = intel_vgpu_get_bar_addr(vgpu, bar); | |
643 | int ret; | |
644 | ||
645 | if (is_write) | |
646 | ret = intel_gvt_ops->emulate_mmio_write(vgpu, | |
647 | bar_start + off, buf, count); | |
648 | else | |
649 | ret = intel_gvt_ops->emulate_mmio_read(vgpu, | |
650 | bar_start + off, buf, count); | |
651 | return ret; | |
652 | } | |
653 | ||
d480b28a CD |
654 | static inline bool intel_vgpu_in_aperture(struct intel_vgpu *vgpu, uint64_t off) |
655 | { | |
656 | return off >= vgpu_aperture_offset(vgpu) && | |
657 | off < vgpu_aperture_offset(vgpu) + vgpu_aperture_sz(vgpu); | |
658 | } | |
659 | ||
660 | static int intel_vgpu_aperture_rw(struct intel_vgpu *vgpu, uint64_t off, | |
661 | void *buf, unsigned long count, bool is_write) | |
662 | { | |
663 | void *aperture_va; | |
664 | ||
665 | if (!intel_vgpu_in_aperture(vgpu, off) || | |
666 | !intel_vgpu_in_aperture(vgpu, off + count)) { | |
667 | gvt_vgpu_err("Invalid aperture offset %llu\n", off); | |
668 | return -EINVAL; | |
669 | } | |
670 | ||
671 | aperture_va = io_mapping_map_wc(&vgpu->gvt->dev_priv->ggtt.iomap, | |
672 | ALIGN_DOWN(off, PAGE_SIZE), | |
673 | count + offset_in_page(off)); | |
674 | if (!aperture_va) | |
675 | return -EIO; | |
676 | ||
677 | if (is_write) | |
678 | memcpy(aperture_va + offset_in_page(off), buf, count); | |
679 | else | |
680 | memcpy(buf, aperture_va + offset_in_page(off), count); | |
681 | ||
682 | io_mapping_unmap(aperture_va); | |
683 | ||
684 | return 0; | |
685 | } | |
686 | ||
659643f7 JS |
687 | static ssize_t intel_vgpu_rw(struct mdev_device *mdev, char *buf, |
688 | size_t count, loff_t *ppos, bool is_write) | |
689 | { | |
690 | struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); | |
691 | unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos); | |
692 | uint64_t pos = *ppos & VFIO_PCI_OFFSET_MASK; | |
693 | int ret = -EINVAL; | |
694 | ||
695 | ||
b851adea | 696 | if (index >= VFIO_PCI_NUM_REGIONS + vgpu->vdev.num_regions) { |
695fbc08 | 697 | gvt_vgpu_err("invalid index: %u\n", index); |
659643f7 JS |
698 | return -EINVAL; |
699 | } | |
700 | ||
701 | switch (index) { | |
702 | case VFIO_PCI_CONFIG_REGION_INDEX: | |
703 | if (is_write) | |
704 | ret = intel_gvt_ops->emulate_cfg_write(vgpu, pos, | |
705 | buf, count); | |
706 | else | |
707 | ret = intel_gvt_ops->emulate_cfg_read(vgpu, pos, | |
708 | buf, count); | |
709 | break; | |
710 | case VFIO_PCI_BAR0_REGION_INDEX: | |
f090a00d CD |
711 | ret = intel_vgpu_bar_rw(vgpu, PCI_BASE_ADDRESS_0, pos, |
712 | buf, count, is_write); | |
659643f7 JS |
713 | break; |
714 | case VFIO_PCI_BAR2_REGION_INDEX: | |
d480b28a | 715 | ret = intel_vgpu_aperture_rw(vgpu, pos, buf, count, is_write); |
f090a00d CD |
716 | break; |
717 | case VFIO_PCI_BAR1_REGION_INDEX: | |
659643f7 JS |
718 | case VFIO_PCI_BAR3_REGION_INDEX: |
719 | case VFIO_PCI_BAR4_REGION_INDEX: | |
720 | case VFIO_PCI_BAR5_REGION_INDEX: | |
721 | case VFIO_PCI_VGA_REGION_INDEX: | |
722 | case VFIO_PCI_ROM_REGION_INDEX: | |
b851adea | 723 | break; |
659643f7 | 724 | default: |
b851adea TZ |
725 | if (index >= VFIO_PCI_NUM_REGIONS + vgpu->vdev.num_regions) |
726 | return -EINVAL; | |
727 | ||
728 | index -= VFIO_PCI_NUM_REGIONS; | |
729 | return vgpu->vdev.region[index].ops->rw(vgpu, buf, count, | |
730 | ppos, is_write); | |
659643f7 JS |
731 | } |
732 | ||
733 | return ret == 0 ? count : ret; | |
734 | } | |
735 | ||
a26ca6ad TZ |
736 | static bool gtt_entry(struct mdev_device *mdev, loff_t *ppos) |
737 | { | |
738 | struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); | |
739 | unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos); | |
740 | struct intel_gvt *gvt = vgpu->gvt; | |
741 | int offset; | |
742 | ||
743 | /* Only allow MMIO GGTT entry access */ | |
744 | if (index != PCI_BASE_ADDRESS_0) | |
745 | return false; | |
746 | ||
747 | offset = (u64)(*ppos & VFIO_PCI_OFFSET_MASK) - | |
748 | intel_vgpu_get_bar_gpa(vgpu, PCI_BASE_ADDRESS_0); | |
749 | ||
750 | return (offset >= gvt->device_info.gtt_start_offset && | |
751 | offset < gvt->device_info.gtt_start_offset + gvt_ggtt_sz(gvt)) ? | |
752 | true : false; | |
753 | } | |
754 | ||
659643f7 JS |
755 | static ssize_t intel_vgpu_read(struct mdev_device *mdev, char __user *buf, |
756 | size_t count, loff_t *ppos) | |
757 | { | |
758 | unsigned int done = 0; | |
759 | int ret; | |
760 | ||
761 | while (count) { | |
762 | size_t filled; | |
763 | ||
a26ca6ad TZ |
764 | /* Only support GGTT entry 8 bytes read */ |
765 | if (count >= 8 && !(*ppos % 8) && | |
766 | gtt_entry(mdev, ppos)) { | |
767 | u64 val; | |
768 | ||
769 | ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val), | |
770 | ppos, false); | |
771 | if (ret <= 0) | |
772 | goto read_err; | |
773 | ||
774 | if (copy_to_user(buf, &val, sizeof(val))) | |
775 | goto read_err; | |
776 | ||
777 | filled = 8; | |
778 | } else if (count >= 4 && !(*ppos % 4)) { | |
659643f7 JS |
779 | u32 val; |
780 | ||
781 | ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val), | |
782 | ppos, false); | |
783 | if (ret <= 0) | |
784 | goto read_err; | |
785 | ||
786 | if (copy_to_user(buf, &val, sizeof(val))) | |
787 | goto read_err; | |
788 | ||
789 | filled = 4; | |
790 | } else if (count >= 2 && !(*ppos % 2)) { | |
791 | u16 val; | |
792 | ||
793 | ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val), | |
794 | ppos, false); | |
795 | if (ret <= 0) | |
796 | goto read_err; | |
797 | ||
798 | if (copy_to_user(buf, &val, sizeof(val))) | |
799 | goto read_err; | |
800 | ||
801 | filled = 2; | |
802 | } else { | |
803 | u8 val; | |
804 | ||
805 | ret = intel_vgpu_rw(mdev, &val, sizeof(val), ppos, | |
806 | false); | |
807 | if (ret <= 0) | |
808 | goto read_err; | |
809 | ||
810 | if (copy_to_user(buf, &val, sizeof(val))) | |
811 | goto read_err; | |
812 | ||
813 | filled = 1; | |
814 | } | |
815 | ||
816 | count -= filled; | |
817 | done += filled; | |
818 | *ppos += filled; | |
819 | buf += filled; | |
820 | } | |
821 | ||
822 | return done; | |
823 | ||
824 | read_err: | |
825 | return -EFAULT; | |
826 | } | |
827 | ||
828 | static ssize_t intel_vgpu_write(struct mdev_device *mdev, | |
829 | const char __user *buf, | |
830 | size_t count, loff_t *ppos) | |
831 | { | |
832 | unsigned int done = 0; | |
833 | int ret; | |
834 | ||
835 | while (count) { | |
836 | size_t filled; | |
837 | ||
a26ca6ad TZ |
838 | /* Only support GGTT entry 8 bytes write */ |
839 | if (count >= 8 && !(*ppos % 8) && | |
840 | gtt_entry(mdev, ppos)) { | |
841 | u64 val; | |
842 | ||
843 | if (copy_from_user(&val, buf, sizeof(val))) | |
844 | goto write_err; | |
845 | ||
846 | ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val), | |
847 | ppos, true); | |
848 | if (ret <= 0) | |
849 | goto write_err; | |
850 | ||
851 | filled = 8; | |
852 | } else if (count >= 4 && !(*ppos % 4)) { | |
659643f7 JS |
853 | u32 val; |
854 | ||
855 | if (copy_from_user(&val, buf, sizeof(val))) | |
856 | goto write_err; | |
857 | ||
858 | ret = intel_vgpu_rw(mdev, (char *)&val, sizeof(val), | |
859 | ppos, true); | |
860 | if (ret <= 0) | |
861 | goto write_err; | |
862 | ||
863 | filled = 4; | |
864 | } else if (count >= 2 && !(*ppos % 2)) { | |
865 | u16 val; | |
866 | ||
867 | if (copy_from_user(&val, buf, sizeof(val))) | |
868 | goto write_err; | |
869 | ||
870 | ret = intel_vgpu_rw(mdev, (char *)&val, | |
871 | sizeof(val), ppos, true); | |
872 | if (ret <= 0) | |
873 | goto write_err; | |
874 | ||
875 | filled = 2; | |
876 | } else { | |
877 | u8 val; | |
878 | ||
879 | if (copy_from_user(&val, buf, sizeof(val))) | |
880 | goto write_err; | |
881 | ||
882 | ret = intel_vgpu_rw(mdev, &val, sizeof(val), | |
883 | ppos, true); | |
884 | if (ret <= 0) | |
885 | goto write_err; | |
886 | ||
887 | filled = 1; | |
888 | } | |
889 | ||
890 | count -= filled; | |
891 | done += filled; | |
892 | *ppos += filled; | |
893 | buf += filled; | |
894 | } | |
895 | ||
896 | return done; | |
897 | write_err: | |
898 | return -EFAULT; | |
899 | } | |
900 | ||
901 | static int intel_vgpu_mmap(struct mdev_device *mdev, struct vm_area_struct *vma) | |
902 | { | |
903 | unsigned int index; | |
904 | u64 virtaddr; | |
905 | unsigned long req_size, pgoff = 0; | |
906 | pgprot_t pg_prot; | |
907 | struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); | |
908 | ||
909 | index = vma->vm_pgoff >> (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT); | |
910 | if (index >= VFIO_PCI_ROM_REGION_INDEX) | |
911 | return -EINVAL; | |
912 | ||
913 | if (vma->vm_end < vma->vm_start) | |
914 | return -EINVAL; | |
915 | if ((vma->vm_flags & VM_SHARED) == 0) | |
916 | return -EINVAL; | |
917 | if (index != VFIO_PCI_BAR2_REGION_INDEX) | |
918 | return -EINVAL; | |
919 | ||
920 | pg_prot = vma->vm_page_prot; | |
921 | virtaddr = vma->vm_start; | |
922 | req_size = vma->vm_end - vma->vm_start; | |
923 | pgoff = vgpu_aperture_pa_base(vgpu) >> PAGE_SHIFT; | |
924 | ||
925 | return remap_pfn_range(vma, virtaddr, pgoff, req_size, pg_prot); | |
926 | } | |
927 | ||
928 | static int intel_vgpu_get_irq_count(struct intel_vgpu *vgpu, int type) | |
929 | { | |
930 | if (type == VFIO_PCI_INTX_IRQ_INDEX || type == VFIO_PCI_MSI_IRQ_INDEX) | |
931 | return 1; | |
932 | ||
933 | return 0; | |
934 | } | |
935 | ||
936 | static int intel_vgpu_set_intx_mask(struct intel_vgpu *vgpu, | |
937 | unsigned int index, unsigned int start, | |
938 | unsigned int count, uint32_t flags, | |
939 | void *data) | |
940 | { | |
941 | return 0; | |
942 | } | |
943 | ||
944 | static int intel_vgpu_set_intx_unmask(struct intel_vgpu *vgpu, | |
945 | unsigned int index, unsigned int start, | |
946 | unsigned int count, uint32_t flags, void *data) | |
947 | { | |
948 | return 0; | |
949 | } | |
950 | ||
951 | static int intel_vgpu_set_intx_trigger(struct intel_vgpu *vgpu, | |
952 | unsigned int index, unsigned int start, unsigned int count, | |
953 | uint32_t flags, void *data) | |
954 | { | |
955 | return 0; | |
956 | } | |
957 | ||
958 | static int intel_vgpu_set_msi_trigger(struct intel_vgpu *vgpu, | |
959 | unsigned int index, unsigned int start, unsigned int count, | |
960 | uint32_t flags, void *data) | |
961 | { | |
962 | struct eventfd_ctx *trigger; | |
963 | ||
964 | if (flags & VFIO_IRQ_SET_DATA_EVENTFD) { | |
965 | int fd = *(int *)data; | |
966 | ||
967 | trigger = eventfd_ctx_fdget(fd); | |
968 | if (IS_ERR(trigger)) { | |
695fbc08 | 969 | gvt_vgpu_err("eventfd_ctx_fdget failed\n"); |
659643f7 JS |
970 | return PTR_ERR(trigger); |
971 | } | |
972 | vgpu->vdev.msi_trigger = trigger; | |
973 | } | |
974 | ||
975 | return 0; | |
976 | } | |
977 | ||
978 | static int intel_vgpu_set_irqs(struct intel_vgpu *vgpu, uint32_t flags, | |
979 | unsigned int index, unsigned int start, unsigned int count, | |
980 | void *data) | |
981 | { | |
982 | int (*func)(struct intel_vgpu *vgpu, unsigned int index, | |
983 | unsigned int start, unsigned int count, uint32_t flags, | |
984 | void *data) = NULL; | |
985 | ||
986 | switch (index) { | |
987 | case VFIO_PCI_INTX_IRQ_INDEX: | |
988 | switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) { | |
989 | case VFIO_IRQ_SET_ACTION_MASK: | |
990 | func = intel_vgpu_set_intx_mask; | |
991 | break; | |
992 | case VFIO_IRQ_SET_ACTION_UNMASK: | |
993 | func = intel_vgpu_set_intx_unmask; | |
994 | break; | |
995 | case VFIO_IRQ_SET_ACTION_TRIGGER: | |
996 | func = intel_vgpu_set_intx_trigger; | |
997 | break; | |
998 | } | |
999 | break; | |
1000 | case VFIO_PCI_MSI_IRQ_INDEX: | |
1001 | switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) { | |
1002 | case VFIO_IRQ_SET_ACTION_MASK: | |
1003 | case VFIO_IRQ_SET_ACTION_UNMASK: | |
1004 | /* XXX Need masking support exported */ | |
1005 | break; | |
1006 | case VFIO_IRQ_SET_ACTION_TRIGGER: | |
1007 | func = intel_vgpu_set_msi_trigger; | |
1008 | break; | |
1009 | } | |
1010 | break; | |
1011 | } | |
1012 | ||
1013 | if (!func) | |
1014 | return -ENOTTY; | |
1015 | ||
1016 | return func(vgpu, index, start, count, flags, data); | |
1017 | } | |
1018 | ||
1019 | static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd, | |
1020 | unsigned long arg) | |
1021 | { | |
1022 | struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); | |
1023 | unsigned long minsz; | |
1024 | ||
1025 | gvt_dbg_core("vgpu%d ioctl, cmd: %d\n", vgpu->id, cmd); | |
1026 | ||
1027 | if (cmd == VFIO_DEVICE_GET_INFO) { | |
1028 | struct vfio_device_info info; | |
1029 | ||
1030 | minsz = offsetofend(struct vfio_device_info, num_irqs); | |
1031 | ||
1032 | if (copy_from_user(&info, (void __user *)arg, minsz)) | |
1033 | return -EFAULT; | |
1034 | ||
1035 | if (info.argsz < minsz) | |
1036 | return -EINVAL; | |
1037 | ||
1038 | info.flags = VFIO_DEVICE_FLAGS_PCI; | |
1039 | info.flags |= VFIO_DEVICE_FLAGS_RESET; | |
b851adea TZ |
1040 | info.num_regions = VFIO_PCI_NUM_REGIONS + |
1041 | vgpu->vdev.num_regions; | |
659643f7 JS |
1042 | info.num_irqs = VFIO_PCI_NUM_IRQS; |
1043 | ||
1044 | return copy_to_user((void __user *)arg, &info, minsz) ? | |
1045 | -EFAULT : 0; | |
1046 | ||
1047 | } else if (cmd == VFIO_DEVICE_GET_REGION_INFO) { | |
1048 | struct vfio_region_info info; | |
1049 | struct vfio_info_cap caps = { .buf = NULL, .size = 0 }; | |
1050 | int i, ret; | |
1051 | struct vfio_region_info_cap_sparse_mmap *sparse = NULL; | |
1052 | size_t size; | |
1053 | int nr_areas = 1; | |
1054 | int cap_type_id; | |
1055 | ||
1056 | minsz = offsetofend(struct vfio_region_info, offset); | |
1057 | ||
1058 | if (copy_from_user(&info, (void __user *)arg, minsz)) | |
1059 | return -EFAULT; | |
1060 | ||
1061 | if (info.argsz < minsz) | |
1062 | return -EINVAL; | |
1063 | ||
1064 | switch (info.index) { | |
1065 | case VFIO_PCI_CONFIG_REGION_INDEX: | |
1066 | info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); | |
02d578e5 | 1067 | info.size = vgpu->gvt->device_info.cfg_space_size; |
659643f7 JS |
1068 | info.flags = VFIO_REGION_INFO_FLAG_READ | |
1069 | VFIO_REGION_INFO_FLAG_WRITE; | |
1070 | break; | |
1071 | case VFIO_PCI_BAR0_REGION_INDEX: | |
1072 | info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); | |
1073 | info.size = vgpu->cfg_space.bar[info.index].size; | |
1074 | if (!info.size) { | |
1075 | info.flags = 0; | |
1076 | break; | |
1077 | } | |
1078 | ||
1079 | info.flags = VFIO_REGION_INFO_FLAG_READ | | |
1080 | VFIO_REGION_INFO_FLAG_WRITE; | |
1081 | break; | |
1082 | case VFIO_PCI_BAR1_REGION_INDEX: | |
1083 | info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); | |
1084 | info.size = 0; | |
1085 | info.flags = 0; | |
1086 | break; | |
1087 | case VFIO_PCI_BAR2_REGION_INDEX: | |
1088 | info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); | |
1089 | info.flags = VFIO_REGION_INFO_FLAG_CAPS | | |
1090 | VFIO_REGION_INFO_FLAG_MMAP | | |
1091 | VFIO_REGION_INFO_FLAG_READ | | |
1092 | VFIO_REGION_INFO_FLAG_WRITE; | |
1093 | info.size = gvt_aperture_sz(vgpu->gvt); | |
1094 | ||
1095 | size = sizeof(*sparse) + | |
1096 | (nr_areas * sizeof(*sparse->areas)); | |
1097 | sparse = kzalloc(size, GFP_KERNEL); | |
1098 | if (!sparse) | |
1099 | return -ENOMEM; | |
1100 | ||
dda01f78 AW |
1101 | sparse->header.id = VFIO_REGION_INFO_CAP_SPARSE_MMAP; |
1102 | sparse->header.version = 1; | |
659643f7 JS |
1103 | sparse->nr_areas = nr_areas; |
1104 | cap_type_id = VFIO_REGION_INFO_CAP_SPARSE_MMAP; | |
1105 | sparse->areas[0].offset = | |
1106 | PAGE_ALIGN(vgpu_aperture_offset(vgpu)); | |
1107 | sparse->areas[0].size = vgpu_aperture_sz(vgpu); | |
659643f7 JS |
1108 | break; |
1109 | ||
1110 | case VFIO_PCI_BAR3_REGION_INDEX ... VFIO_PCI_BAR5_REGION_INDEX: | |
1111 | info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); | |
1112 | info.size = 0; | |
659643f7 | 1113 | info.flags = 0; |
072ec93d | 1114 | |
659643f7 JS |
1115 | gvt_dbg_core("get region info bar:%d\n", info.index); |
1116 | break; | |
1117 | ||
1118 | case VFIO_PCI_ROM_REGION_INDEX: | |
1119 | case VFIO_PCI_VGA_REGION_INDEX: | |
072ec93d PZ |
1120 | info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); |
1121 | info.size = 0; | |
1122 | info.flags = 0; | |
1123 | ||
659643f7 JS |
1124 | gvt_dbg_core("get region info index:%d\n", info.index); |
1125 | break; | |
1126 | default: | |
1127 | { | |
dda01f78 AW |
1128 | struct vfio_region_info_cap_type cap_type = { |
1129 | .header.id = VFIO_REGION_INFO_CAP_TYPE, | |
1130 | .header.version = 1 }; | |
659643f7 JS |
1131 | |
1132 | if (info.index >= VFIO_PCI_NUM_REGIONS + | |
1133 | vgpu->vdev.num_regions) | |
1134 | return -EINVAL; | |
1135 | ||
1136 | i = info.index - VFIO_PCI_NUM_REGIONS; | |
1137 | ||
1138 | info.offset = | |
1139 | VFIO_PCI_INDEX_TO_OFFSET(info.index); | |
1140 | info.size = vgpu->vdev.region[i].size; | |
1141 | info.flags = vgpu->vdev.region[i].flags; | |
1142 | ||
1143 | cap_type.type = vgpu->vdev.region[i].type; | |
1144 | cap_type.subtype = vgpu->vdev.region[i].subtype; | |
1145 | ||
1146 | ret = vfio_info_add_capability(&caps, | |
dda01f78 AW |
1147 | &cap_type.header, |
1148 | sizeof(cap_type)); | |
659643f7 JS |
1149 | if (ret) |
1150 | return ret; | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | if ((info.flags & VFIO_REGION_INFO_FLAG_CAPS) && sparse) { | |
1155 | switch (cap_type_id) { | |
1156 | case VFIO_REGION_INFO_CAP_SPARSE_MMAP: | |
1157 | ret = vfio_info_add_capability(&caps, | |
dda01f78 AW |
1158 | &sparse->header, sizeof(*sparse) + |
1159 | (sparse->nr_areas * | |
1160 | sizeof(*sparse->areas))); | |
659643f7 JS |
1161 | kfree(sparse); |
1162 | if (ret) | |
1163 | return ret; | |
1164 | break; | |
1165 | default: | |
1166 | return -EINVAL; | |
1167 | } | |
1168 | } | |
1169 | ||
1170 | if (caps.size) { | |
b851adea | 1171 | info.flags |= VFIO_REGION_INFO_FLAG_CAPS; |
659643f7 JS |
1172 | if (info.argsz < sizeof(info) + caps.size) { |
1173 | info.argsz = sizeof(info) + caps.size; | |
1174 | info.cap_offset = 0; | |
1175 | } else { | |
1176 | vfio_info_cap_shift(&caps, sizeof(info)); | |
1177 | if (copy_to_user((void __user *)arg + | |
1178 | sizeof(info), caps.buf, | |
1179 | caps.size)) { | |
1180 | kfree(caps.buf); | |
1181 | return -EFAULT; | |
1182 | } | |
1183 | info.cap_offset = sizeof(info); | |
1184 | } | |
1185 | ||
1186 | kfree(caps.buf); | |
1187 | } | |
1188 | ||
1189 | return copy_to_user((void __user *)arg, &info, minsz) ? | |
1190 | -EFAULT : 0; | |
1191 | } else if (cmd == VFIO_DEVICE_GET_IRQ_INFO) { | |
1192 | struct vfio_irq_info info; | |
1193 | ||
1194 | minsz = offsetofend(struct vfio_irq_info, count); | |
1195 | ||
1196 | if (copy_from_user(&info, (void __user *)arg, minsz)) | |
1197 | return -EFAULT; | |
1198 | ||
1199 | if (info.argsz < minsz || info.index >= VFIO_PCI_NUM_IRQS) | |
1200 | return -EINVAL; | |
1201 | ||
1202 | switch (info.index) { | |
1203 | case VFIO_PCI_INTX_IRQ_INDEX: | |
1204 | case VFIO_PCI_MSI_IRQ_INDEX: | |
1205 | break; | |
1206 | default: | |
1207 | return -EINVAL; | |
1208 | } | |
1209 | ||
1210 | info.flags = VFIO_IRQ_INFO_EVENTFD; | |
1211 | ||
1212 | info.count = intel_vgpu_get_irq_count(vgpu, info.index); | |
1213 | ||
1214 | if (info.index == VFIO_PCI_INTX_IRQ_INDEX) | |
1215 | info.flags |= (VFIO_IRQ_INFO_MASKABLE | | |
1216 | VFIO_IRQ_INFO_AUTOMASKED); | |
1217 | else | |
1218 | info.flags |= VFIO_IRQ_INFO_NORESIZE; | |
1219 | ||
1220 | return copy_to_user((void __user *)arg, &info, minsz) ? | |
1221 | -EFAULT : 0; | |
1222 | } else if (cmd == VFIO_DEVICE_SET_IRQS) { | |
1223 | struct vfio_irq_set hdr; | |
1224 | u8 *data = NULL; | |
1225 | int ret = 0; | |
1226 | size_t data_size = 0; | |
1227 | ||
1228 | minsz = offsetofend(struct vfio_irq_set, count); | |
1229 | ||
1230 | if (copy_from_user(&hdr, (void __user *)arg, minsz)) | |
1231 | return -EFAULT; | |
1232 | ||
1233 | if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) { | |
1234 | int max = intel_vgpu_get_irq_count(vgpu, hdr.index); | |
1235 | ||
1236 | ret = vfio_set_irqs_validate_and_prepare(&hdr, max, | |
1237 | VFIO_PCI_NUM_IRQS, &data_size); | |
1238 | if (ret) { | |
695fbc08 | 1239 | gvt_vgpu_err("intel:vfio_set_irqs_validate_and_prepare failed\n"); |
659643f7 JS |
1240 | return -EINVAL; |
1241 | } | |
1242 | if (data_size) { | |
1243 | data = memdup_user((void __user *)(arg + minsz), | |
1244 | data_size); | |
1245 | if (IS_ERR(data)) | |
1246 | return PTR_ERR(data); | |
1247 | } | |
1248 | } | |
1249 | ||
1250 | ret = intel_vgpu_set_irqs(vgpu, hdr.flags, hdr.index, | |
1251 | hdr.start, hdr.count, data); | |
1252 | kfree(data); | |
1253 | ||
1254 | return ret; | |
1255 | } else if (cmd == VFIO_DEVICE_RESET) { | |
1256 | intel_gvt_ops->vgpu_reset(vgpu); | |
1257 | return 0; | |
e546e281 TZ |
1258 | } else if (cmd == VFIO_DEVICE_QUERY_GFX_PLANE) { |
1259 | struct vfio_device_gfx_plane_info dmabuf; | |
1260 | int ret = 0; | |
1261 | ||
1262 | minsz = offsetofend(struct vfio_device_gfx_plane_info, | |
1263 | dmabuf_id); | |
1264 | if (copy_from_user(&dmabuf, (void __user *)arg, minsz)) | |
1265 | return -EFAULT; | |
1266 | if (dmabuf.argsz < minsz) | |
1267 | return -EINVAL; | |
1268 | ||
1269 | ret = intel_gvt_ops->vgpu_query_plane(vgpu, &dmabuf); | |
1270 | if (ret != 0) | |
1271 | return ret; | |
1272 | ||
1273 | return copy_to_user((void __user *)arg, &dmabuf, minsz) ? | |
1274 | -EFAULT : 0; | |
1275 | } else if (cmd == VFIO_DEVICE_GET_GFX_DMABUF) { | |
1276 | __u32 dmabuf_id; | |
1277 | __s32 dmabuf_fd; | |
1278 | ||
1279 | if (get_user(dmabuf_id, (__u32 __user *)arg)) | |
1280 | return -EFAULT; | |
1281 | ||
1282 | dmabuf_fd = intel_gvt_ops->vgpu_get_dmabuf(vgpu, dmabuf_id); | |
1283 | return dmabuf_fd; | |
1284 | ||
659643f7 JS |
1285 | } |
1286 | ||
1287 | return 0; | |
1288 | } | |
1289 | ||
7a7a6561 ZW |
1290 | static ssize_t |
1291 | vgpu_id_show(struct device *dev, struct device_attribute *attr, | |
1292 | char *buf) | |
1293 | { | |
1294 | struct mdev_device *mdev = mdev_from_dev(dev); | |
1295 | ||
1296 | if (mdev) { | |
1297 | struct intel_vgpu *vgpu = (struct intel_vgpu *) | |
1298 | mdev_get_drvdata(mdev); | |
1299 | return sprintf(buf, "%d\n", vgpu->id); | |
1300 | } | |
1301 | return sprintf(buf, "\n"); | |
1302 | } | |
1303 | ||
a45050d7 ZW |
1304 | static ssize_t |
1305 | hw_id_show(struct device *dev, struct device_attribute *attr, | |
1306 | char *buf) | |
1307 | { | |
1308 | struct mdev_device *mdev = mdev_from_dev(dev); | |
1309 | ||
1310 | if (mdev) { | |
1311 | struct intel_vgpu *vgpu = (struct intel_vgpu *) | |
1312 | mdev_get_drvdata(mdev); | |
1313 | return sprintf(buf, "%u\n", | |
1406a14b | 1314 | vgpu->submission.shadow_ctx->hw_id); |
a45050d7 ZW |
1315 | } |
1316 | return sprintf(buf, "\n"); | |
1317 | } | |
1318 | ||
7a7a6561 | 1319 | static DEVICE_ATTR_RO(vgpu_id); |
a45050d7 | 1320 | static DEVICE_ATTR_RO(hw_id); |
7a7a6561 ZW |
1321 | |
1322 | static struct attribute *intel_vgpu_attrs[] = { | |
1323 | &dev_attr_vgpu_id.attr, | |
a45050d7 | 1324 | &dev_attr_hw_id.attr, |
7a7a6561 ZW |
1325 | NULL |
1326 | }; | |
1327 | ||
1328 | static const struct attribute_group intel_vgpu_group = { | |
1329 | .name = "intel_vgpu", | |
1330 | .attrs = intel_vgpu_attrs, | |
1331 | }; | |
1332 | ||
1333 | static const struct attribute_group *intel_vgpu_groups[] = { | |
1334 | &intel_vgpu_group, | |
1335 | NULL, | |
1336 | }; | |
1337 | ||
6aa23ced | 1338 | static struct mdev_parent_ops intel_vgpu_ops = { |
7a7a6561 | 1339 | .mdev_attr_groups = intel_vgpu_groups, |
659643f7 JS |
1340 | .create = intel_vgpu_create, |
1341 | .remove = intel_vgpu_remove, | |
1342 | ||
1343 | .open = intel_vgpu_open, | |
1344 | .release = intel_vgpu_release, | |
1345 | ||
1346 | .read = intel_vgpu_read, | |
1347 | .write = intel_vgpu_write, | |
1348 | .mmap = intel_vgpu_mmap, | |
1349 | .ioctl = intel_vgpu_ioctl, | |
1350 | }; | |
1351 | ||
f30437c5 JS |
1352 | static int kvmgt_host_init(struct device *dev, void *gvt, const void *ops) |
1353 | { | |
6aa23ced | 1354 | struct attribute **kvm_type_attrs; |
1355 | struct attribute_group **kvm_vgpu_type_groups; | |
f30437c5 JS |
1356 | |
1357 | intel_gvt_ops = ops; | |
6aa23ced | 1358 | if (!intel_gvt_ops->get_gvt_attrs(&kvm_type_attrs, |
1359 | &kvm_vgpu_type_groups)) | |
1360 | return -EFAULT; | |
1361 | intel_vgpu_ops.supported_type_groups = kvm_vgpu_type_groups; | |
f30437c5 | 1362 | |
659643f7 | 1363 | return mdev_register_device(dev, &intel_vgpu_ops); |
f30437c5 JS |
1364 | } |
1365 | ||
1366 | static void kvmgt_host_exit(struct device *dev, void *gvt) | |
1367 | { | |
659643f7 | 1368 | mdev_unregister_device(dev); |
f30437c5 JS |
1369 | } |
1370 | ||
1371 | static int kvmgt_write_protect_add(unsigned long handle, u64 gfn) | |
1372 | { | |
659643f7 JS |
1373 | struct kvmgt_guest_info *info; |
1374 | struct kvm *kvm; | |
f30437c5 JS |
1375 | struct kvm_memory_slot *slot; |
1376 | int idx; | |
1377 | ||
659643f7 JS |
1378 | if (!handle_valid(handle)) |
1379 | return -ESRCH; | |
1380 | ||
1381 | info = (struct kvmgt_guest_info *)handle; | |
1382 | kvm = info->kvm; | |
1383 | ||
f30437c5 JS |
1384 | idx = srcu_read_lock(&kvm->srcu); |
1385 | slot = gfn_to_memslot(kvm, gfn); | |
faaaa53b JS |
1386 | if (!slot) { |
1387 | srcu_read_unlock(&kvm->srcu, idx); | |
1388 | return -EINVAL; | |
1389 | } | |
f30437c5 JS |
1390 | |
1391 | spin_lock(&kvm->mmu_lock); | |
1392 | ||
1393 | if (kvmgt_gfn_is_write_protected(info, gfn)) | |
1394 | goto out; | |
1395 | ||
1396 | kvm_slot_page_track_add_page(kvm, slot, gfn, KVM_PAGE_TRACK_WRITE); | |
1397 | kvmgt_protect_table_add(info, gfn); | |
1398 | ||
1399 | out: | |
1400 | spin_unlock(&kvm->mmu_lock); | |
1401 | srcu_read_unlock(&kvm->srcu, idx); | |
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | static int kvmgt_write_protect_remove(unsigned long handle, u64 gfn) | |
1406 | { | |
659643f7 JS |
1407 | struct kvmgt_guest_info *info; |
1408 | struct kvm *kvm; | |
f30437c5 JS |
1409 | struct kvm_memory_slot *slot; |
1410 | int idx; | |
1411 | ||
659643f7 JS |
1412 | if (!handle_valid(handle)) |
1413 | return 0; | |
1414 | ||
1415 | info = (struct kvmgt_guest_info *)handle; | |
1416 | kvm = info->kvm; | |
1417 | ||
f30437c5 JS |
1418 | idx = srcu_read_lock(&kvm->srcu); |
1419 | slot = gfn_to_memslot(kvm, gfn); | |
faaaa53b JS |
1420 | if (!slot) { |
1421 | srcu_read_unlock(&kvm->srcu, idx); | |
1422 | return -EINVAL; | |
1423 | } | |
f30437c5 JS |
1424 | |
1425 | spin_lock(&kvm->mmu_lock); | |
1426 | ||
1427 | if (!kvmgt_gfn_is_write_protected(info, gfn)) | |
1428 | goto out; | |
1429 | ||
1430 | kvm_slot_page_track_remove_page(kvm, slot, gfn, KVM_PAGE_TRACK_WRITE); | |
1431 | kvmgt_protect_table_del(info, gfn); | |
1432 | ||
1433 | out: | |
1434 | spin_unlock(&kvm->mmu_lock); | |
1435 | srcu_read_unlock(&kvm->srcu, idx); | |
1436 | return 0; | |
1437 | } | |
1438 | ||
1439 | static void kvmgt_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, | |
1440 | const u8 *val, int len, | |
1441 | struct kvm_page_track_notifier_node *node) | |
1442 | { | |
1443 | struct kvmgt_guest_info *info = container_of(node, | |
1444 | struct kvmgt_guest_info, track_node); | |
1445 | ||
1446 | if (kvmgt_gfn_is_write_protected(info, gpa_to_gfn(gpa))) | |
4fafba2d ZW |
1447 | intel_gvt_ops->write_protect_handler(info->vgpu, gpa, |
1448 | (void *)val, len); | |
f30437c5 JS |
1449 | } |
1450 | ||
1451 | static void kvmgt_page_track_flush_slot(struct kvm *kvm, | |
1452 | struct kvm_memory_slot *slot, | |
1453 | struct kvm_page_track_notifier_node *node) | |
1454 | { | |
1455 | int i; | |
1456 | gfn_t gfn; | |
1457 | struct kvmgt_guest_info *info = container_of(node, | |
1458 | struct kvmgt_guest_info, track_node); | |
1459 | ||
1460 | spin_lock(&kvm->mmu_lock); | |
1461 | for (i = 0; i < slot->npages; i++) { | |
1462 | gfn = slot->base_gfn + i; | |
1463 | if (kvmgt_gfn_is_write_protected(info, gfn)) { | |
1464 | kvm_slot_page_track_remove_page(kvm, slot, gfn, | |
1465 | KVM_PAGE_TRACK_WRITE); | |
1466 | kvmgt_protect_table_del(info, gfn); | |
1467 | } | |
1468 | } | |
1469 | spin_unlock(&kvm->mmu_lock); | |
1470 | } | |
1471 | ||
659643f7 JS |
1472 | static bool __kvmgt_vgpu_exist(struct intel_vgpu *vgpu, struct kvm *kvm) |
1473 | { | |
1474 | struct intel_vgpu *itr; | |
1475 | struct kvmgt_guest_info *info; | |
1476 | int id; | |
1477 | bool ret = false; | |
1478 | ||
1479 | mutex_lock(&vgpu->gvt->lock); | |
1480 | for_each_active_vgpu(vgpu->gvt, itr, id) { | |
1481 | if (!handle_valid(itr->handle)) | |
1482 | continue; | |
1483 | ||
1484 | info = (struct kvmgt_guest_info *)itr->handle; | |
1485 | if (kvm && kvm == info->kvm) { | |
1486 | ret = true; | |
1487 | goto out; | |
1488 | } | |
1489 | } | |
1490 | out: | |
1491 | mutex_unlock(&vgpu->gvt->lock); | |
1492 | return ret; | |
1493 | } | |
1494 | ||
1495 | static int kvmgt_guest_init(struct mdev_device *mdev) | |
1496 | { | |
1497 | struct kvmgt_guest_info *info; | |
1498 | struct intel_vgpu *vgpu; | |
1499 | struct kvm *kvm; | |
1500 | ||
1501 | vgpu = mdev_get_drvdata(mdev); | |
1502 | if (handle_valid(vgpu->handle)) | |
1503 | return -EEXIST; | |
1504 | ||
1505 | kvm = vgpu->vdev.kvm; | |
1506 | if (!kvm || kvm->mm != current->mm) { | |
695fbc08 | 1507 | gvt_vgpu_err("KVM is required to use Intel vGPU\n"); |
659643f7 JS |
1508 | return -ESRCH; |
1509 | } | |
1510 | ||
1511 | if (__kvmgt_vgpu_exist(vgpu, kvm)) | |
1512 | return -EEXIST; | |
1513 | ||
1514 | info = vzalloc(sizeof(struct kvmgt_guest_info)); | |
1515 | if (!info) | |
1516 | return -ENOMEM; | |
1517 | ||
1518 | vgpu->handle = (unsigned long)info; | |
1519 | info->vgpu = vgpu; | |
1520 | info->kvm = kvm; | |
93a15b58 | 1521 | kvm_get_kvm(info->kvm); |
659643f7 JS |
1522 | |
1523 | kvmgt_protect_table_init(info); | |
1524 | gvt_cache_init(vgpu); | |
1525 | ||
e546e281 TZ |
1526 | mutex_init(&vgpu->dmabuf_lock); |
1527 | init_completion(&vgpu->vblank_done); | |
1528 | ||
659643f7 JS |
1529 | info->track_node.track_write = kvmgt_page_track_write; |
1530 | info->track_node.track_flush_slot = kvmgt_page_track_flush_slot; | |
1531 | kvm_page_track_register_notifier(kvm, &info->track_node); | |
1532 | ||
1533 | return 0; | |
1534 | } | |
1535 | ||
1536 | static bool kvmgt_guest_exit(struct kvmgt_guest_info *info) | |
1537 | { | |
659643f7 | 1538 | kvm_page_track_unregister_notifier(info->kvm, &info->track_node); |
93a15b58 | 1539 | kvm_put_kvm(info->kvm); |
659643f7 | 1540 | kvmgt_protect_table_destroy(info); |
8ff842fd | 1541 | gvt_cache_destroy(info->vgpu); |
659643f7 JS |
1542 | vfree(info); |
1543 | ||
1544 | return true; | |
1545 | } | |
1546 | ||
f30437c5 JS |
1547 | static int kvmgt_attach_vgpu(void *vgpu, unsigned long *handle) |
1548 | { | |
1549 | /* nothing to do here */ | |
1550 | return 0; | |
1551 | } | |
1552 | ||
1553 | static void kvmgt_detach_vgpu(unsigned long handle) | |
1554 | { | |
1555 | /* nothing to do here */ | |
1556 | } | |
1557 | ||
1558 | static int kvmgt_inject_msi(unsigned long handle, u32 addr, u16 data) | |
1559 | { | |
659643f7 JS |
1560 | struct kvmgt_guest_info *info; |
1561 | struct intel_vgpu *vgpu; | |
f30437c5 | 1562 | |
659643f7 JS |
1563 | if (!handle_valid(handle)) |
1564 | return -ESRCH; | |
f30437c5 | 1565 | |
659643f7 JS |
1566 | info = (struct kvmgt_guest_info *)handle; |
1567 | vgpu = info->vgpu; | |
1568 | ||
1569 | if (eventfd_signal(vgpu->vdev.msi_trigger, 1) == 1) | |
1570 | return 0; | |
1571 | ||
1572 | return -EFAULT; | |
f30437c5 JS |
1573 | } |
1574 | ||
1575 | static unsigned long kvmgt_gfn_to_pfn(unsigned long handle, unsigned long gfn) | |
1576 | { | |
b86dc6ed | 1577 | unsigned long iova, pfn; |
659643f7 JS |
1578 | struct kvmgt_guest_info *info; |
1579 | struct device *dev; | |
695fbc08 | 1580 | struct intel_vgpu *vgpu; |
f30437c5 JS |
1581 | int rc; |
1582 | ||
659643f7 JS |
1583 | if (!handle_valid(handle)) |
1584 | return INTEL_GVT_INVALID_ADDR; | |
1585 | ||
1586 | info = (struct kvmgt_guest_info *)handle; | |
695fbc08 | 1587 | vgpu = info->vgpu; |
b86dc6ed CD |
1588 | iova = gvt_cache_find(info->vgpu, gfn); |
1589 | if (iova != INTEL_GVT_INVALID_ADDR) | |
1590 | return iova; | |
f30437c5 | 1591 | |
659643f7 | 1592 | pfn = INTEL_GVT_INVALID_ADDR; |
99e3123e | 1593 | dev = mdev_dev(info->vgpu->vdev.mdev); |
659643f7 | 1594 | rc = vfio_pin_pages(dev, &gfn, 1, IOMMU_READ | IOMMU_WRITE, &pfn); |
f30437c5 | 1595 | if (rc != 1) { |
695fbc08 TZ |
1596 | gvt_vgpu_err("vfio_pin_pages failed for gfn 0x%lx: %d\n", |
1597 | gfn, rc); | |
659643f7 | 1598 | return INTEL_GVT_INVALID_ADDR; |
f30437c5 | 1599 | } |
b86dc6ed CD |
1600 | /* transfer to host iova for GFX to use DMA */ |
1601 | rc = gvt_dma_map_iova(info->vgpu, pfn, &iova); | |
4a0b3444 | 1602 | if (rc) { |
695fbc08 | 1603 | gvt_vgpu_err("gvt_dma_map_iova failed for gfn: 0x%lx\n", gfn); |
4a0b3444 CD |
1604 | vfio_unpin_pages(dev, &gfn, 1); |
1605 | return INTEL_GVT_INVALID_ADDR; | |
1606 | } | |
f30437c5 | 1607 | |
b86dc6ed CD |
1608 | gvt_cache_add(info->vgpu, gfn, iova); |
1609 | return iova; | |
f30437c5 JS |
1610 | } |
1611 | ||
f30437c5 JS |
1612 | static int kvmgt_rw_gpa(unsigned long handle, unsigned long gpa, |
1613 | void *buf, unsigned long len, bool write) | |
1614 | { | |
f440c8a5 JS |
1615 | struct kvmgt_guest_info *info; |
1616 | struct kvm *kvm; | |
5180edc2 | 1617 | int idx, ret; |
f440c8a5 | 1618 | bool kthread = current->mm == NULL; |
f30437c5 | 1619 | |
659643f7 JS |
1620 | if (!handle_valid(handle)) |
1621 | return -ESRCH; | |
1622 | ||
f440c8a5 JS |
1623 | info = (struct kvmgt_guest_info *)handle; |
1624 | kvm = info->kvm; | |
f30437c5 | 1625 | |
f440c8a5 JS |
1626 | if (kthread) |
1627 | use_mm(kvm->mm); | |
f30437c5 | 1628 | |
5180edc2 | 1629 | idx = srcu_read_lock(&kvm->srcu); |
f440c8a5 JS |
1630 | ret = write ? kvm_write_guest(kvm, gpa, buf, len) : |
1631 | kvm_read_guest(kvm, gpa, buf, len); | |
5180edc2 | 1632 | srcu_read_unlock(&kvm->srcu, idx); |
f440c8a5 JS |
1633 | |
1634 | if (kthread) | |
1635 | unuse_mm(kvm->mm); | |
1636 | ||
1637 | return ret; | |
f30437c5 JS |
1638 | } |
1639 | ||
1640 | static int kvmgt_read_gpa(unsigned long handle, unsigned long gpa, | |
1641 | void *buf, unsigned long len) | |
1642 | { | |
1643 | return kvmgt_rw_gpa(handle, gpa, buf, len, false); | |
1644 | } | |
1645 | ||
1646 | static int kvmgt_write_gpa(unsigned long handle, unsigned long gpa, | |
1647 | void *buf, unsigned long len) | |
1648 | { | |
1649 | return kvmgt_rw_gpa(handle, gpa, buf, len, true); | |
1650 | } | |
1651 | ||
1652 | static unsigned long kvmgt_virt_to_pfn(void *addr) | |
1653 | { | |
1654 | return PFN_DOWN(__pa(addr)); | |
1655 | } | |
1656 | ||
cc753fbe HY |
1657 | static bool kvmgt_is_valid_gfn(unsigned long handle, unsigned long gfn) |
1658 | { | |
1659 | struct kvmgt_guest_info *info; | |
1660 | struct kvm *kvm; | |
1661 | ||
1662 | if (!handle_valid(handle)) | |
1663 | return false; | |
1664 | ||
1665 | info = (struct kvmgt_guest_info *)handle; | |
1666 | kvm = info->kvm; | |
1667 | ||
1668 | return kvm_is_visible_gfn(kvm, gfn); | |
1669 | ||
1670 | } | |
1671 | ||
f30437c5 | 1672 | struct intel_gvt_mpt kvmgt_mpt = { |
f30437c5 JS |
1673 | .host_init = kvmgt_host_init, |
1674 | .host_exit = kvmgt_host_exit, | |
1675 | .attach_vgpu = kvmgt_attach_vgpu, | |
1676 | .detach_vgpu = kvmgt_detach_vgpu, | |
1677 | .inject_msi = kvmgt_inject_msi, | |
1678 | .from_virt_to_mfn = kvmgt_virt_to_pfn, | |
1679 | .set_wp_page = kvmgt_write_protect_add, | |
1680 | .unset_wp_page = kvmgt_write_protect_remove, | |
1681 | .read_gpa = kvmgt_read_gpa, | |
1682 | .write_gpa = kvmgt_write_gpa, | |
1683 | .gfn_to_mfn = kvmgt_gfn_to_pfn, | |
b851adea | 1684 | .set_opregion = kvmgt_set_opregion, |
e546e281 TZ |
1685 | .get_vfio_device = kvmgt_get_vfio_device, |
1686 | .put_vfio_device = kvmgt_put_vfio_device, | |
cc753fbe | 1687 | .is_valid_gfn = kvmgt_is_valid_gfn, |
f30437c5 JS |
1688 | }; |
1689 | EXPORT_SYMBOL_GPL(kvmgt_mpt); | |
1690 | ||
1691 | static int __init kvmgt_init(void) | |
1692 | { | |
1693 | return 0; | |
1694 | } | |
1695 | ||
1696 | static void __exit kvmgt_exit(void) | |
1697 | { | |
1698 | } | |
1699 | ||
1700 | module_init(kvmgt_init); | |
1701 | module_exit(kvmgt_exit); | |
1702 | ||
1703 | MODULE_LICENSE("GPL and additional rights"); | |
1704 | MODULE_AUTHOR("Intel Corporation"); |