blob: 98f793bc93765bbb1ba58ee1e1776f8b94fb28bb [file] [log] [blame]
Jason Wang2c53d0f2020-03-26 22:01:24 +08001// SPDX-License-Identifier: GPL-2.0-only
2/*
Max Gurtovoydb1e8bb2020-12-15 15:42:56 +01003 * VDPA device simulator core.
Jason Wang2c53d0f2020-03-26 22:01:24 +08004 *
5 * Copyright (c) 2020, Red Hat Inc. All rights reserved.
6 * Author: Jason Wang <jasowang@redhat.com>
7 *
8 */
9
10#include <linux/init.h>
11#include <linux/module.h>
12#include <linux/device.h>
13#include <linux/kernel.h>
Jason Wang2c53d0f2020-03-26 22:01:24 +080014#include <linux/slab.h>
15#include <linux/sched.h>
Christoph Hellwig0a0f0d82020-09-22 15:31:03 +020016#include <linux/dma-map-ops.h>
Jason Wang2c53d0f2020-03-26 22:01:24 +080017#include <linux/vringh.h>
18#include <linux/vdpa.h>
19#include <linux/vhost_iotlb.h>
Stefano Garzarella4080fc12021-03-15 17:34:37 +010020#include <linux/iova.h>
Max Gurtovoydb1e8bb2020-12-15 15:42:56 +010021
22#include "vdpa_sim.h"
Jason Wang2c53d0f2020-03-26 22:01:24 +080023
24#define DRV_VERSION "0.1"
25#define DRV_AUTHOR "Jason Wang <jasowang@redhat.com>"
Max Gurtovoydb1e8bb2020-12-15 15:42:56 +010026#define DRV_DESC "vDPA Device Simulator core"
Jason Wang2c53d0f2020-03-26 22:01:24 +080027#define DRV_LICENSE "GPL v2"
28
Jason Wangde91a4d2020-08-04 19:20:41 +030029static int batch_mapping = 1;
30module_param(batch_mapping, int, 0444);
31MODULE_PARM_DESC(batch_mapping, "Batched mapping 1 -Enable; 0 - Disable");
32
Stefano Garzarella2fc0ebf2020-12-15 15:42:42 +010033static int max_iotlb_entries = 2048;
34module_param(max_iotlb_entries, int, 0444);
35MODULE_PARM_DESC(max_iotlb_entries,
36 "Maximum number of iotlb entries. 0 means unlimited. (default: 2048)");
37
Jason Wang2c53d0f2020-03-26 22:01:24 +080038#define VDPASIM_QUEUE_ALIGN PAGE_SIZE
39#define VDPASIM_QUEUE_MAX 256
Jason Wang2c53d0f2020-03-26 22:01:24 +080040#define VDPASIM_VENDOR_ID 0
Jason Wang2c53d0f2020-03-26 22:01:24 +080041
42static struct vdpasim *vdpa_to_sim(struct vdpa_device *vdpa)
43{
44 return container_of(vdpa, struct vdpasim, vdpa);
45}
46
47static struct vdpasim *dev_to_sim(struct device *dev)
48{
49 struct vdpa_device *vdpa = dev_to_vdpa(dev);
50
51 return vdpa_to_sim(vdpa);
52}
53
Stefano Garzarellab2404912020-12-15 15:42:52 +010054static void vdpasim_vq_notify(struct vringh *vring)
55{
56 struct vdpasim_virtqueue *vq =
57 container_of(vring, struct vdpasim_virtqueue, vring);
58
59 if (!vq->cb)
60 return;
61
62 vq->cb(vq->private);
63}
64
Jason Wang2c53d0f2020-03-26 22:01:24 +080065static void vdpasim_queue_ready(struct vdpasim *vdpasim, unsigned int idx)
66{
67 struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
Jason Wang2c53d0f2020-03-26 22:01:24 +080068
Stefano Garzarella011c35b2020-12-15 15:42:46 +010069 vringh_init_iotlb(&vq->vring, vdpasim->dev_attr.supported_features,
YueHaibing0f8e38232020-04-10 19:54:22 +080070 VDPASIM_QUEUE_MAX, false,
71 (struct vring_desc *)(uintptr_t)vq->desc_addr,
72 (struct vring_avail *)
73 (uintptr_t)vq->driver_addr,
74 (struct vring_used *)
75 (uintptr_t)vq->device_addr);
Stefano Garzarellab2404912020-12-15 15:42:52 +010076
77 vq->vring.notify = vdpasim_vq_notify;
Jason Wang2c53d0f2020-03-26 22:01:24 +080078}
79
Stefano Garzarella011c35b2020-12-15 15:42:46 +010080static void vdpasim_vq_reset(struct vdpasim *vdpasim,
81 struct vdpasim_virtqueue *vq)
Jason Wang2c53d0f2020-03-26 22:01:24 +080082{
Samuel Zou18e643c2020-05-09 10:20:02 +080083 vq->ready = false;
Jason Wang2c53d0f2020-03-26 22:01:24 +080084 vq->desc_addr = 0;
85 vq->driver_addr = 0;
86 vq->device_addr = 0;
87 vq->cb = NULL;
88 vq->private = NULL;
Stefano Garzarella011c35b2020-12-15 15:42:46 +010089 vringh_init_iotlb(&vq->vring, vdpasim->dev_attr.supported_features,
90 VDPASIM_QUEUE_MAX, false, NULL, NULL, NULL);
Stefano Garzarellab2404912020-12-15 15:42:52 +010091
92 vq->vring.notify = NULL;
Jason Wang2c53d0f2020-03-26 22:01:24 +080093}
94
95static void vdpasim_reset(struct vdpasim *vdpasim)
96{
97 int i;
98
Stefano Garzarella6c6e28f2020-12-15 15:42:44 +010099 for (i = 0; i < vdpasim->dev_attr.nvqs; i++)
Stefano Garzarella011c35b2020-12-15 15:42:46 +0100100 vdpasim_vq_reset(vdpasim, &vdpasim->vqs[i]);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800101
Max Gurtovoy0ea9ee42020-07-31 15:38:22 +0800102 spin_lock(&vdpasim->iommu_lock);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800103 vhost_iotlb_reset(vdpasim->iommu);
Max Gurtovoy0ea9ee42020-07-31 15:38:22 +0800104 spin_unlock(&vdpasim->iommu_lock);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800105
106 vdpasim->features = 0;
107 vdpasim->status = 0;
108 ++vdpasim->generation;
109}
110
Jason Wang2c53d0f2020-03-26 22:01:24 +0800111static int dir_to_perm(enum dma_data_direction dir)
112{
113 int perm = -EFAULT;
114
115 switch (dir) {
116 case DMA_FROM_DEVICE:
117 perm = VHOST_MAP_WO;
118 break;
119 case DMA_TO_DEVICE:
120 perm = VHOST_MAP_RO;
121 break;
122 case DMA_BIDIRECTIONAL:
123 perm = VHOST_MAP_RW;
124 break;
125 default:
126 break;
127 }
128
129 return perm;
130}
131
Stefano Garzarella4080fc12021-03-15 17:34:37 +0100132static dma_addr_t vdpasim_map_range(struct vdpasim *vdpasim, phys_addr_t paddr,
133 size_t size, unsigned int perm)
134{
135 struct iova *iova;
136 dma_addr_t dma_addr;
137 int ret;
138
139 /* We set the limit_pfn to the maximum (ULONG_MAX - 1) */
140 iova = alloc_iova(&vdpasim->iova, size, ULONG_MAX - 1, true);
141 if (!iova)
142 return DMA_MAPPING_ERROR;
143
144 dma_addr = iova_dma_addr(&vdpasim->iova, iova);
145
146 spin_lock(&vdpasim->iommu_lock);
147 ret = vhost_iotlb_add_range(vdpasim->iommu, (u64)dma_addr,
148 (u64)dma_addr + size - 1, (u64)paddr, perm);
149 spin_unlock(&vdpasim->iommu_lock);
150
151 if (ret) {
152 __free_iova(&vdpasim->iova, iova);
153 return DMA_MAPPING_ERROR;
154 }
155
156 return dma_addr;
157}
158
159static void vdpasim_unmap_range(struct vdpasim *vdpasim, dma_addr_t dma_addr,
160 size_t size)
161{
162 spin_lock(&vdpasim->iommu_lock);
163 vhost_iotlb_del_range(vdpasim->iommu, (u64)dma_addr,
164 (u64)dma_addr + size - 1);
165 spin_unlock(&vdpasim->iommu_lock);
166
167 free_iova(&vdpasim->iova, iova_pfn(&vdpasim->iova, dma_addr));
168}
169
Jason Wang2c53d0f2020-03-26 22:01:24 +0800170static dma_addr_t vdpasim_map_page(struct device *dev, struct page *page,
171 unsigned long offset, size_t size,
172 enum dma_data_direction dir,
173 unsigned long attrs)
174{
175 struct vdpasim *vdpasim = dev_to_sim(dev);
Stefano Garzarella4080fc12021-03-15 17:34:37 +0100176 phys_addr_t paddr = page_to_phys(page) + offset;
177 int perm = dir_to_perm(dir);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800178
179 if (perm < 0)
180 return DMA_MAPPING_ERROR;
181
Stefano Garzarella4080fc12021-03-15 17:34:37 +0100182 return vdpasim_map_range(vdpasim, paddr, size, perm);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800183}
184
185static void vdpasim_unmap_page(struct device *dev, dma_addr_t dma_addr,
186 size_t size, enum dma_data_direction dir,
187 unsigned long attrs)
188{
189 struct vdpasim *vdpasim = dev_to_sim(dev);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800190
Stefano Garzarella4080fc12021-03-15 17:34:37 +0100191 vdpasim_unmap_range(vdpasim, dma_addr, size);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800192}
193
194static void *vdpasim_alloc_coherent(struct device *dev, size_t size,
195 dma_addr_t *dma_addr, gfp_t flag,
196 unsigned long attrs)
197{
198 struct vdpasim *vdpasim = dev_to_sim(dev);
Stefano Garzarella4080fc12021-03-15 17:34:37 +0100199 phys_addr_t paddr;
200 void *addr;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800201
Stefano Garzarella4080fc12021-03-15 17:34:37 +0100202 addr = kmalloc(size, flag);
Max Gurtovoy0ea9ee42020-07-31 15:38:22 +0800203 if (!addr) {
Jason Wang2c53d0f2020-03-26 22:01:24 +0800204 *dma_addr = DMA_MAPPING_ERROR;
Stefano Garzarella4080fc12021-03-15 17:34:37 +0100205 return NULL;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800206 }
Stefano Garzarella4080fc12021-03-15 17:34:37 +0100207
208 paddr = virt_to_phys(addr);
209
210 *dma_addr = vdpasim_map_range(vdpasim, paddr, size, VHOST_MAP_RW);
211 if (*dma_addr == DMA_MAPPING_ERROR) {
212 kfree(addr);
213 return NULL;
214 }
Jason Wang2c53d0f2020-03-26 22:01:24 +0800215
216 return addr;
217}
218
219static void vdpasim_free_coherent(struct device *dev, size_t size,
220 void *vaddr, dma_addr_t dma_addr,
221 unsigned long attrs)
222{
223 struct vdpasim *vdpasim = dev_to_sim(dev);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800224
Stefano Garzarella4080fc12021-03-15 17:34:37 +0100225 vdpasim_unmap_range(vdpasim, dma_addr, size);
Max Gurtovoy0ea9ee42020-07-31 15:38:22 +0800226
Stefano Garzarella4080fc12021-03-15 17:34:37 +0100227 kfree(vaddr);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800228}
229
230static const struct dma_map_ops vdpasim_dma_ops = {
231 .map_page = vdpasim_map_page,
232 .unmap_page = vdpasim_unmap_page,
233 .alloc = vdpasim_alloc_coherent,
234 .free = vdpasim_free_coherent,
235};
236
Stefano Garzarella36a9c302020-12-15 15:42:43 +0100237static const struct vdpa_config_ops vdpasim_config_ops;
238static const struct vdpa_config_ops vdpasim_batch_config_ops;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800239
Max Gurtovoydb1e8bb2020-12-15 15:42:56 +0100240struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr)
Jason Wang2c53d0f2020-03-26 22:01:24 +0800241{
Jason Wangde91a4d2020-08-04 19:20:41 +0300242 const struct vdpa_config_ops *ops;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800243 struct vdpasim *vdpasim;
244 struct device *dev;
Max Gurtovoy423248d2020-12-15 15:42:41 +0100245 int i, ret = -ENOMEM;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800246
Jason Wangde91a4d2020-08-04 19:20:41 +0300247 if (batch_mapping)
Stefano Garzarella36a9c302020-12-15 15:42:43 +0100248 ops = &vdpasim_batch_config_ops;
Jason Wangde91a4d2020-08-04 19:20:41 +0300249 else
Stefano Garzarella36a9c302020-12-15 15:42:43 +0100250 ops = &vdpasim_config_ops;
Jason Wangde91a4d2020-08-04 19:20:41 +0300251
Stefano Garzarella6c6e28f2020-12-15 15:42:44 +0100252 vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops,
Jason Wangf00bdce2021-02-23 14:19:04 +0800253 dev_attr->name);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800254 if (!vdpasim)
255 goto err_alloc;
256
Stefano Garzarella6c6e28f2020-12-15 15:42:44 +0100257 vdpasim->dev_attr = *dev_attr;
Stefano Garzarellaa13b5912020-12-15 15:42:47 +0100258 INIT_WORK(&vdpasim->work, dev_attr->work_fn);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800259 spin_lock_init(&vdpasim->lock);
Michael S. Tsirkin1e3e7922020-08-10 08:44:43 -0400260 spin_lock_init(&vdpasim->iommu_lock);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800261
262 dev = &vdpasim->vdpa.dev;
Laurent Vivier1eca16b2020-10-27 18:59:14 +0100263 dev->dma_mask = &dev->coherent_dma_mask;
264 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
265 goto err_iommu;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800266 set_dma_ops(dev, &vdpasim_dma_ops);
Parav Pandita3c06ae2021-01-05 12:32:03 +0200267 vdpasim->vdpa.mdev = dev_attr->mgmt_dev;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800268
Stefano Garzarellaf37cbbc2020-12-15 15:42:49 +0100269 vdpasim->config = kzalloc(dev_attr->config_size, GFP_KERNEL);
270 if (!vdpasim->config)
271 goto err_iommu;
272
Stefano Garzarella6c6e28f2020-12-15 15:42:44 +0100273 vdpasim->vqs = kcalloc(dev_attr->nvqs, sizeof(struct vdpasim_virtqueue),
Max Gurtovoy423248d2020-12-15 15:42:41 +0100274 GFP_KERNEL);
275 if (!vdpasim->vqs)
276 goto err_iommu;
277
Stefano Garzarella2fc0ebf2020-12-15 15:42:42 +0100278 vdpasim->iommu = vhost_iotlb_alloc(max_iotlb_entries, 0);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800279 if (!vdpasim->iommu)
280 goto err_iommu;
281
Stefano Garzarellada7af692020-12-15 15:42:54 +0100282 vdpasim->buffer = kvmalloc(dev_attr->buffer_size, GFP_KERNEL);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800283 if (!vdpasim->buffer)
284 goto err_iommu;
285
Stefano Garzarella6c6e28f2020-12-15 15:42:44 +0100286 for (i = 0; i < dev_attr->nvqs; i++)
Stefano Garzarellaf53d9912021-03-15 17:34:38 +0100287 vringh_set_iotlb(&vdpasim->vqs[i].vring, vdpasim->iommu,
288 &vdpasim->iommu_lock);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800289
Stefano Garzarella4080fc12021-03-15 17:34:37 +0100290 ret = iova_cache_get();
291 if (ret)
292 goto err_iommu;
293
294 /* For simplicity we use an IOVA allocator with byte granularity */
295 init_iova_domain(&vdpasim->iova, 1, 0);
296
Jason Wang2c53d0f2020-03-26 22:01:24 +0800297 vdpasim->vdpa.dma_dev = dev;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800298
299 return vdpasim;
300
301err_iommu:
302 put_device(dev);
303err_alloc:
304 return ERR_PTR(ret);
305}
Max Gurtovoydb1e8bb2020-12-15 15:42:56 +0100306EXPORT_SYMBOL_GPL(vdpasim_create);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800307
308static int vdpasim_set_vq_address(struct vdpa_device *vdpa, u16 idx,
309 u64 desc_area, u64 driver_area,
310 u64 device_area)
311{
312 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
313 struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
314
315 vq->desc_addr = desc_area;
316 vq->driver_addr = driver_area;
317 vq->device_addr = device_area;
318
319 return 0;
320}
321
322static void vdpasim_set_vq_num(struct vdpa_device *vdpa, u16 idx, u32 num)
323{
324 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
325 struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
326
327 vq->num = num;
328}
329
330static void vdpasim_kick_vq(struct vdpa_device *vdpa, u16 idx)
331{
332 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
333 struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
334
335 if (vq->ready)
336 schedule_work(&vdpasim->work);
337}
338
339static void vdpasim_set_vq_cb(struct vdpa_device *vdpa, u16 idx,
340 struct vdpa_callback *cb)
341{
342 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
343 struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
344
345 vq->cb = cb->callback;
346 vq->private = cb->private;
347}
348
349static void vdpasim_set_vq_ready(struct vdpa_device *vdpa, u16 idx, bool ready)
350{
351 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
352 struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
353
354 spin_lock(&vdpasim->lock);
355 vq->ready = ready;
356 if (vq->ready)
357 vdpasim_queue_ready(vdpasim, idx);
358 spin_unlock(&vdpasim->lock);
359}
360
361static bool vdpasim_get_vq_ready(struct vdpa_device *vdpa, u16 idx)
362{
363 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
364 struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
365
366 return vq->ready;
367}
368
Eli Cohenaac50c02020-08-04 19:20:43 +0300369static int vdpasim_set_vq_state(struct vdpa_device *vdpa, u16 idx,
370 const struct vdpa_vq_state *state)
Jason Wang2c53d0f2020-03-26 22:01:24 +0800371{
372 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
373 struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
374 struct vringh *vrh = &vq->vring;
375
376 spin_lock(&vdpasim->lock);
Eli Cohenaac50c02020-08-04 19:20:43 +0300377 vrh->last_avail_idx = state->avail_index;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800378 spin_unlock(&vdpasim->lock);
379
380 return 0;
381}
382
Eli Cohen23750e32020-08-04 19:20:44 +0300383static int vdpasim_get_vq_state(struct vdpa_device *vdpa, u16 idx,
384 struct vdpa_vq_state *state)
Jason Wang2c53d0f2020-03-26 22:01:24 +0800385{
386 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
387 struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
388 struct vringh *vrh = &vq->vring;
389
Eli Cohenaac50c02020-08-04 19:20:43 +0300390 state->avail_index = vrh->last_avail_idx;
Eli Cohen23750e32020-08-04 19:20:44 +0300391 return 0;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800392}
393
Michael S. Tsirkin425a50702020-04-09 16:26:21 -0400394static u32 vdpasim_get_vq_align(struct vdpa_device *vdpa)
Jason Wang2c53d0f2020-03-26 22:01:24 +0800395{
396 return VDPASIM_QUEUE_ALIGN;
397}
398
399static u64 vdpasim_get_features(struct vdpa_device *vdpa)
400{
Stefano Garzarella011c35b2020-12-15 15:42:46 +0100401 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
402
403 return vdpasim->dev_attr.supported_features;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800404}
405
406static int vdpasim_set_features(struct vdpa_device *vdpa, u64 features)
407{
408 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
409
410 /* DMA mapping must be done by driver */
Michael S. Tsirkin321bd212020-06-24 18:24:33 -0400411 if (!(features & (1ULL << VIRTIO_F_ACCESS_PLATFORM)))
Jason Wang2c53d0f2020-03-26 22:01:24 +0800412 return -EINVAL;
413
Stefano Garzarella011c35b2020-12-15 15:42:46 +0100414 vdpasim->features = features & vdpasim->dev_attr.supported_features;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800415
416 return 0;
417}
418
419static void vdpasim_set_config_cb(struct vdpa_device *vdpa,
420 struct vdpa_callback *cb)
421{
422 /* We don't support config interrupt */
423}
424
425static u16 vdpasim_get_vq_num_max(struct vdpa_device *vdpa)
426{
427 return VDPASIM_QUEUE_MAX;
428}
429
430static u32 vdpasim_get_device_id(struct vdpa_device *vdpa)
431{
Stefano Garzarella2f8f4612020-12-15 15:42:45 +0100432 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
433
434 return vdpasim->dev_attr.id;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800435}
436
437static u32 vdpasim_get_vendor_id(struct vdpa_device *vdpa)
438{
439 return VDPASIM_VENDOR_ID;
440}
441
442static u8 vdpasim_get_status(struct vdpa_device *vdpa)
443{
444 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
445 u8 status;
446
447 spin_lock(&vdpasim->lock);
448 status = vdpasim->status;
449 spin_unlock(&vdpasim->lock);
450
YueHaibing21818ed2020-04-02 10:49:16 +0800451 return status;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800452}
453
454static void vdpasim_set_status(struct vdpa_device *vdpa, u8 status)
455{
456 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
457
458 spin_lock(&vdpasim->lock);
459 vdpasim->status = status;
460 if (status == 0)
461 vdpasim_reset(vdpasim);
462 spin_unlock(&vdpasim->lock);
463}
464
Stefano Garzarella442706f2021-03-15 17:34:44 +0100465static size_t vdpasim_get_config_size(struct vdpa_device *vdpa)
466{
467 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
468
469 return vdpasim->dev_attr.config_size;
470}
471
Jason Wang2c53d0f2020-03-26 22:01:24 +0800472static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset,
473 void *buf, unsigned int len)
474{
475 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
476
Stefano Garzarella65b70952020-12-15 15:42:50 +0100477 if (offset + len > vdpasim->dev_attr.config_size)
478 return;
479
480 if (vdpasim->dev_attr.get_config)
481 vdpasim->dev_attr.get_config(vdpasim, vdpasim->config);
482
483 memcpy(buf, vdpasim->config + offset, len);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800484}
485
486static void vdpasim_set_config(struct vdpa_device *vdpa, unsigned int offset,
487 const void *buf, unsigned int len)
488{
Stefano Garzarellac124a952020-12-15 15:42:51 +0100489 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
490
491 if (offset + len > vdpasim->dev_attr.config_size)
492 return;
493
494 memcpy(vdpasim->config + offset, buf, len);
495
496 if (vdpasim->dev_attr.set_config)
497 vdpasim->dev_attr.set_config(vdpasim, vdpasim->config);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800498}
499
500static u32 vdpasim_get_generation(struct vdpa_device *vdpa)
501{
502 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
503
504 return vdpasim->generation;
505}
506
Jason Wang70a62fc2020-10-23 17:00:43 +0800507static struct vdpa_iova_range vdpasim_get_iova_range(struct vdpa_device *vdpa)
508{
509 struct vdpa_iova_range range = {
510 .first = 0ULL,
511 .last = ULLONG_MAX,
512 };
513
514 return range;
515}
516
Jason Wang2c53d0f2020-03-26 22:01:24 +0800517static int vdpasim_set_map(struct vdpa_device *vdpa,
518 struct vhost_iotlb *iotlb)
519{
520 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
521 struct vhost_iotlb_map *map;
522 u64 start = 0ULL, last = 0ULL - 1;
523 int ret;
524
Max Gurtovoy0ea9ee42020-07-31 15:38:22 +0800525 spin_lock(&vdpasim->iommu_lock);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800526 vhost_iotlb_reset(vdpasim->iommu);
527
528 for (map = vhost_iotlb_itree_first(iotlb, start, last); map;
529 map = vhost_iotlb_itree_next(map, start, last)) {
530 ret = vhost_iotlb_add_range(vdpasim->iommu, map->start,
531 map->last, map->addr, map->perm);
532 if (ret)
533 goto err;
534 }
Max Gurtovoy0ea9ee42020-07-31 15:38:22 +0800535 spin_unlock(&vdpasim->iommu_lock);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800536 return 0;
537
538err:
539 vhost_iotlb_reset(vdpasim->iommu);
Max Gurtovoy0ea9ee42020-07-31 15:38:22 +0800540 spin_unlock(&vdpasim->iommu_lock);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800541 return ret;
542}
543
544static int vdpasim_dma_map(struct vdpa_device *vdpa, u64 iova, u64 size,
545 u64 pa, u32 perm)
546{
547 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
Max Gurtovoy0ea9ee42020-07-31 15:38:22 +0800548 int ret;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800549
Max Gurtovoy0ea9ee42020-07-31 15:38:22 +0800550 spin_lock(&vdpasim->iommu_lock);
551 ret = vhost_iotlb_add_range(vdpasim->iommu, iova, iova + size - 1, pa,
552 perm);
553 spin_unlock(&vdpasim->iommu_lock);
554
555 return ret;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800556}
557
558static int vdpasim_dma_unmap(struct vdpa_device *vdpa, u64 iova, u64 size)
559{
560 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
561
Max Gurtovoy0ea9ee42020-07-31 15:38:22 +0800562 spin_lock(&vdpasim->iommu_lock);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800563 vhost_iotlb_del_range(vdpasim->iommu, iova, iova + size - 1);
Max Gurtovoy0ea9ee42020-07-31 15:38:22 +0800564 spin_unlock(&vdpasim->iommu_lock);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800565
566 return 0;
567}
568
569static void vdpasim_free(struct vdpa_device *vdpa)
570{
571 struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
Stefano Garzarellabc433e52021-03-15 17:34:43 +0100572 int i;
Jason Wang2c53d0f2020-03-26 22:01:24 +0800573
574 cancel_work_sync(&vdpasim->work);
Stefano Garzarellabc433e52021-03-15 17:34:43 +0100575
576 for (i = 0; i < vdpasim->dev_attr.nvqs; i++) {
577 vringh_kiov_cleanup(&vdpasim->vqs[i].out_iov);
578 vringh_kiov_cleanup(&vdpasim->vqs[i].in_iov);
579 }
580
Stefano Garzarella4080fc12021-03-15 17:34:37 +0100581 put_iova_domain(&vdpasim->iova);
582 iova_cache_put();
Stefano Garzarella165be1f2020-12-15 15:42:53 +0100583 kvfree(vdpasim->buffer);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800584 if (vdpasim->iommu)
585 vhost_iotlb_free(vdpasim->iommu);
Max Gurtovoy423248d2020-12-15 15:42:41 +0100586 kfree(vdpasim->vqs);
Stefano Garzarellaf37cbbc2020-12-15 15:42:49 +0100587 kfree(vdpasim->config);
Jason Wang2c53d0f2020-03-26 22:01:24 +0800588}
589
Stefano Garzarella36a9c302020-12-15 15:42:43 +0100590static const struct vdpa_config_ops vdpasim_config_ops = {
Jason Wang2c53d0f2020-03-26 22:01:24 +0800591 .set_vq_address = vdpasim_set_vq_address,
592 .set_vq_num = vdpasim_set_vq_num,
593 .kick_vq = vdpasim_kick_vq,
594 .set_vq_cb = vdpasim_set_vq_cb,
595 .set_vq_ready = vdpasim_set_vq_ready,
596 .get_vq_ready = vdpasim_get_vq_ready,
597 .set_vq_state = vdpasim_set_vq_state,
598 .get_vq_state = vdpasim_get_vq_state,
599 .get_vq_align = vdpasim_get_vq_align,
600 .get_features = vdpasim_get_features,
601 .set_features = vdpasim_set_features,
602 .set_config_cb = vdpasim_set_config_cb,
603 .get_vq_num_max = vdpasim_get_vq_num_max,
604 .get_device_id = vdpasim_get_device_id,
605 .get_vendor_id = vdpasim_get_vendor_id,
606 .get_status = vdpasim_get_status,
607 .set_status = vdpasim_set_status,
Stefano Garzarella442706f2021-03-15 17:34:44 +0100608 .get_config_size = vdpasim_get_config_size,
Jason Wang2c53d0f2020-03-26 22:01:24 +0800609 .get_config = vdpasim_get_config,
610 .set_config = vdpasim_set_config,
611 .get_generation = vdpasim_get_generation,
Jason Wang70a62fc2020-10-23 17:00:43 +0800612 .get_iova_range = vdpasim_get_iova_range,
Jason Wang2c53d0f2020-03-26 22:01:24 +0800613 .dma_map = vdpasim_dma_map,
614 .dma_unmap = vdpasim_dma_unmap,
615 .free = vdpasim_free,
616};
617
Stefano Garzarella36a9c302020-12-15 15:42:43 +0100618static const struct vdpa_config_ops vdpasim_batch_config_ops = {
Jason Wangde91a4d2020-08-04 19:20:41 +0300619 .set_vq_address = vdpasim_set_vq_address,
620 .set_vq_num = vdpasim_set_vq_num,
621 .kick_vq = vdpasim_kick_vq,
622 .set_vq_cb = vdpasim_set_vq_cb,
623 .set_vq_ready = vdpasim_set_vq_ready,
624 .get_vq_ready = vdpasim_get_vq_ready,
625 .set_vq_state = vdpasim_set_vq_state,
626 .get_vq_state = vdpasim_get_vq_state,
627 .get_vq_align = vdpasim_get_vq_align,
628 .get_features = vdpasim_get_features,
629 .set_features = vdpasim_set_features,
630 .set_config_cb = vdpasim_set_config_cb,
631 .get_vq_num_max = vdpasim_get_vq_num_max,
632 .get_device_id = vdpasim_get_device_id,
633 .get_vendor_id = vdpasim_get_vendor_id,
634 .get_status = vdpasim_get_status,
635 .set_status = vdpasim_set_status,
Stefano Garzarella442706f2021-03-15 17:34:44 +0100636 .get_config_size = vdpasim_get_config_size,
Jason Wangde91a4d2020-08-04 19:20:41 +0300637 .get_config = vdpasim_get_config,
638 .set_config = vdpasim_set_config,
639 .get_generation = vdpasim_get_generation,
Jason Wang70a62fc2020-10-23 17:00:43 +0800640 .get_iova_range = vdpasim_get_iova_range,
Jason Wangde91a4d2020-08-04 19:20:41 +0300641 .set_map = vdpasim_set_map,
642 .free = vdpasim_free,
643};
644
Jason Wang2c53d0f2020-03-26 22:01:24 +0800645MODULE_VERSION(DRV_VERSION);
646MODULE_LICENSE(DRV_LICENSE);
647MODULE_AUTHOR(DRV_AUTHOR);
648MODULE_DESCRIPTION(DRV_DESC);