1 /*-
2 * Copyright (c) 2015 Michal Meloun
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/param.h>
28 #include <sys/systm.h>
29 #include <sys/bus.h>
30 #include <sys/kernel.h>
31 #include <sys/malloc.h>
32
33 #include <machine/bus.h>
34
35 #include <dev/clk/clk.h>
36 #include <dev/drm2/drmP.h>
37 #include <dev/drm2/drm_crtc_helper.h>
38 #include <dev/drm2/drm_fb_helper.h>
39
40 #include <arm/nvidia/drm2/tegra_drm.h>
41
42 #include <sys/vmem.h>
43 #include <sys/vmem.h>
44 #include <vm/vm.h>
45 #include <vm/vm_pageout.h>
46
47 static void
tegra_bo_destruct(struct tegra_bo * bo)48 tegra_bo_destruct(struct tegra_bo *bo)
49 {
50 vm_page_t m;
51 size_t size;
52 int i;
53
54 if (bo->cdev_pager == NULL)
55 return;
56
57 size = round_page(bo->gem_obj.size);
58 if (bo->vbase != 0)
59 pmap_qremove(bo->vbase, bo->npages);
60
61 VM_OBJECT_WLOCK(bo->cdev_pager);
62 for (i = 0; i < bo->npages; i++) {
63 m = bo->m[i];
64 vm_page_busy_acquire(m, 0);
65 cdev_pager_free_page(bo->cdev_pager, m);
66 m->flags &= ~PG_FICTITIOUS;
67 vm_page_unwire_noq(m);
68 vm_page_free(m);
69 }
70 VM_OBJECT_WUNLOCK(bo->cdev_pager);
71
72 vm_object_deallocate(bo->cdev_pager);
73 if (bo->vbase != 0)
74 vmem_free(kmem_arena, bo->vbase, size);
75 }
76
77 static void
tegra_bo_free_object(struct drm_gem_object * gem_obj)78 tegra_bo_free_object(struct drm_gem_object *gem_obj)
79 {
80 struct tegra_bo *bo;
81
82 bo = container_of(gem_obj, struct tegra_bo, gem_obj);
83 drm_gem_free_mmap_offset(gem_obj);
84 drm_gem_object_release(gem_obj);
85
86 tegra_bo_destruct(bo);
87
88 free(bo->m, DRM_MEM_DRIVER);
89 free(bo, DRM_MEM_DRIVER);
90 }
91
92 static int
tegra_bo_alloc_contig(size_t npages,u_long alignment,vm_memattr_t memattr,vm_page_t ** ret_page)93 tegra_bo_alloc_contig(size_t npages, u_long alignment, vm_memattr_t memattr,
94 vm_page_t **ret_page)
95 {
96 vm_page_t m;
97 int err, i, tries;
98 vm_paddr_t low, high, boundary;
99
100 low = 0;
101 high = -1UL;
102 boundary = 0;
103 tries = 0;
104 retry:
105 m = vm_page_alloc_noobj_contig(VM_ALLOC_WIRED | VM_ALLOC_ZERO, npages,
106 low, high, alignment, boundary, memattr);
107 if (m == NULL) {
108 if (tries < 3) {
109 err = vm_page_reclaim_contig(0, npages, low, high,
110 alignment, boundary);
111 if (err == ENOMEM)
112 vm_wait(NULL);
113 else if (err != 0)
114 return (ENOMEM);
115 tries++;
116 goto retry;
117 }
118 return (ENOMEM);
119 }
120
121 for (i = 0; i < npages; i++, m++) {
122 m->valid = VM_PAGE_BITS_ALL;
123 (*ret_page)[i] = m;
124 }
125
126 return (0);
127 }
128
129 /* Initialize pager and insert all object pages to it*/
130 static int
tegra_bo_init_pager(struct tegra_bo * bo)131 tegra_bo_init_pager(struct tegra_bo *bo)
132 {
133 vm_page_t m;
134 size_t size;
135 int i;
136
137 size = round_page(bo->gem_obj.size);
138
139 bo->pbase = VM_PAGE_TO_PHYS(bo->m[0]);
140 if (vmem_alloc(kmem_arena, size, M_WAITOK | M_BESTFIT, &bo->vbase))
141 return (ENOMEM);
142
143 VM_OBJECT_WLOCK(bo->cdev_pager);
144 for (i = 0; i < bo->npages; i++) {
145 m = bo->m[i];
146 /*
147 * XXX This is a temporary hack.
148 * We need pager suitable for paging (mmap) managed
149 * real (non-fictitious) pages.
150 * - managed pages are needed for clean module unload.
151 * - aliasing fictitious page to real one is bad,
152 * pmap cannot handle this situation without issues
153 * It expects that
154 * paddr = PHYS_TO_VM_PAGE(VM_PAGE_TO_PHYS(paddr))
155 * for every single page passed to pmap.
156 */
157 m->oflags &= ~VPO_UNMANAGED;
158 m->flags |= PG_FICTITIOUS;
159 if (vm_page_insert(m, bo->cdev_pager, i) != 0)
160 return (EINVAL);
161 }
162 VM_OBJECT_WUNLOCK(bo->cdev_pager);
163
164 pmap_qenter(bo->vbase, bo->m, bo->npages);
165 return (0);
166 }
167
168 /* Allocate memory for frame buffer */
169 static int
tegra_bo_alloc(struct drm_device * drm,struct tegra_bo * bo)170 tegra_bo_alloc(struct drm_device *drm, struct tegra_bo *bo)
171 {
172 size_t size;
173 int rv;
174
175 size = bo->gem_obj.size;
176
177 bo->npages = atop(size);
178 bo->m = malloc(sizeof(vm_page_t *) * bo->npages, DRM_MEM_DRIVER,
179 M_WAITOK | M_ZERO);
180
181 rv = tegra_bo_alloc_contig(bo->npages, PAGE_SIZE,
182 VM_MEMATTR_WRITE_COMBINING, &(bo->m));
183 if (rv != 0) {
184 DRM_WARNING("Cannot allocate memory for gem object.\n");
185 return (rv);
186 }
187 rv = tegra_bo_init_pager(bo);
188 if (rv != 0) {
189 DRM_WARNING("Cannot initialize gem object pager.\n");
190 return (rv);
191 }
192 return (0);
193 }
194
195 int
tegra_bo_create(struct drm_device * drm,size_t size,struct tegra_bo ** res_bo)196 tegra_bo_create(struct drm_device *drm, size_t size, struct tegra_bo **res_bo)
197 {
198 struct tegra_bo *bo;
199 int rv;
200
201 if (size <= 0)
202 return (-EINVAL);
203
204 bo = malloc(sizeof(*bo), DRM_MEM_DRIVER, M_WAITOK | M_ZERO);
205
206 size = round_page(size);
207 rv = drm_gem_object_init(drm, &bo->gem_obj, size);
208 if (rv != 0) {
209 free(bo, DRM_MEM_DRIVER);
210 return (rv);
211 }
212 rv = drm_gem_create_mmap_offset(&bo->gem_obj);
213 if (rv != 0) {
214 drm_gem_object_release(&bo->gem_obj);
215 free(bo, DRM_MEM_DRIVER);
216 return (rv);
217 }
218
219 bo->cdev_pager = cdev_pager_allocate(&bo->gem_obj, OBJT_MGTDEVICE,
220 drm->driver->gem_pager_ops, size, 0, 0, NULL);
221 rv = tegra_bo_alloc(drm, bo);
222 if (rv != 0) {
223 tegra_bo_free_object(&bo->gem_obj);
224 return (rv);
225 }
226
227 *res_bo = bo;
228 return (0);
229 }
230
231 static int
tegra_bo_create_with_handle(struct drm_file * file,struct drm_device * drm,size_t size,uint32_t * handle,struct tegra_bo ** res_bo)232 tegra_bo_create_with_handle(struct drm_file *file, struct drm_device *drm,
233 size_t size, uint32_t *handle, struct tegra_bo **res_bo)
234 {
235 int rv;
236 struct tegra_bo *bo;
237
238 rv = tegra_bo_create(drm, size, &bo);
239 if (rv != 0)
240 return (rv);
241
242 rv = drm_gem_handle_create(file, &bo->gem_obj, handle);
243 if (rv != 0) {
244 tegra_bo_free_object(&bo->gem_obj);
245 drm_gem_object_release(&bo->gem_obj);
246 return (rv);
247 }
248
249 drm_gem_object_unreference_unlocked(&bo->gem_obj);
250
251 *res_bo = bo;
252 return (0);
253 }
254
255 static int
tegra_bo_dumb_create(struct drm_file * file,struct drm_device * drm_dev,struct drm_mode_create_dumb * args)256 tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm_dev,
257 struct drm_mode_create_dumb *args)
258 {
259 struct tegra_drm *drm;
260 struct tegra_bo *bo;
261 int rv;
262
263 drm = container_of(drm_dev, struct tegra_drm, drm_dev);
264
265 args->pitch= (args->width * args->bpp + 7) / 8;
266 args->pitch = roundup(args->pitch, drm->pitch_align);
267 args->size = args->pitch * args->height;
268 rv = tegra_bo_create_with_handle(file, drm_dev, args->size,
269 &args->handle, &bo);
270
271 return (rv);
272 }
273
274 static int
tegra_bo_dumb_map_offset(struct drm_file * file_priv,struct drm_device * drm_dev,uint32_t handle,uint64_t * offset)275 tegra_bo_dumb_map_offset(struct drm_file *file_priv,
276 struct drm_device *drm_dev, uint32_t handle, uint64_t *offset)
277 {
278 struct drm_gem_object *gem_obj;
279 int rv;
280
281 DRM_LOCK(drm_dev);
282 gem_obj = drm_gem_object_lookup(drm_dev, file_priv, handle);
283 if (gem_obj == NULL) {
284 device_printf(drm_dev->dev, "Object not found\n");
285 DRM_UNLOCK(drm_dev);
286 return (-EINVAL);
287 }
288 rv = drm_gem_create_mmap_offset(gem_obj);
289 if (rv != 0)
290 goto fail;
291
292 *offset = DRM_GEM_MAPPING_OFF(gem_obj->map_list.key) |
293 DRM_GEM_MAPPING_KEY;
294
295 drm_gem_object_unreference(gem_obj);
296 DRM_UNLOCK(drm_dev);
297 return (0);
298
299 fail:
300 drm_gem_object_unreference(gem_obj);
301 DRM_UNLOCK(drm_dev);
302 return (rv);
303 }
304
305 static int
tegra_bo_dumb_destroy(struct drm_file * file_priv,struct drm_device * drm_dev,unsigned int handle)306 tegra_bo_dumb_destroy(struct drm_file *file_priv, struct drm_device *drm_dev,
307 unsigned int handle)
308 {
309 int rv;
310
311 rv = drm_gem_handle_delete(file_priv, handle);
312 return (rv);
313 }
314
315 /*
316 * mmap support
317 */
318 static int
tegra_gem_pager_fault(vm_object_t vm_obj,vm_ooffset_t offset,int prot,vm_page_t * mres)319 tegra_gem_pager_fault(vm_object_t vm_obj, vm_ooffset_t offset, int prot,
320 vm_page_t *mres)
321 {
322
323 #ifdef DRM_PAGER_DEBUG
324 DRM_DEBUG("object %p offset %jd prot %d mres %p\n",
325 vm_obj, (intmax_t)offset, prot, mres);
326 #endif
327 return (VM_PAGER_FAIL);
328
329 }
330
331 static int
tegra_gem_pager_ctor(void * handle,vm_ooffset_t size,vm_prot_t prot,vm_ooffset_t foff,struct ucred * cred,u_short * color)332 tegra_gem_pager_ctor(void *handle, vm_ooffset_t size, vm_prot_t prot,
333 vm_ooffset_t foff, struct ucred *cred, u_short *color)
334 {
335
336 if (color != NULL)
337 *color = 0;
338 return (0);
339 }
340
341 static void
tegra_gem_pager_dtor(void * handle)342 tegra_gem_pager_dtor(void *handle)
343 {
344
345 }
346
347 static struct cdev_pager_ops tegra_gem_pager_ops = {
348 .cdev_pg_fault = tegra_gem_pager_fault,
349 .cdev_pg_ctor = tegra_gem_pager_ctor,
350 .cdev_pg_dtor = tegra_gem_pager_dtor
351 };
352
353 /* Fill up relevant fields in drm_driver ops */
354 void
tegra_bo_driver_register(struct drm_driver * drm_drv)355 tegra_bo_driver_register(struct drm_driver *drm_drv)
356 {
357 drm_drv->gem_free_object = tegra_bo_free_object;
358 drm_drv->gem_pager_ops = &tegra_gem_pager_ops;
359 drm_drv->dumb_create = tegra_bo_dumb_create;
360 drm_drv->dumb_map_offset = tegra_bo_dumb_map_offset;
361 drm_drv->dumb_destroy = tegra_bo_dumb_destroy;
362 }
363