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/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/bus.h> 33 #include <sys/kernel.h> 34 #include <sys/malloc.h> 35 36 #include <machine/bus.h> 37 38 #include <dev/extres/clk/clk.h> 39 #include <dev/drm2/drmP.h> 40 #include <dev/drm2/drm_crtc_helper.h> 41 #include <dev/drm2/drm_fb_helper.h> 42 43 #include <arm/nvidia/drm2/tegra_drm.h> 44 45 #include <sys/vmem.h> 46 #include <sys/vmem.h> 47 #include <vm/vm.h> 48 #include <vm/vm_pageout.h> 49 50 static void 51 tegra_bo_destruct(struct tegra_bo *bo) 52 { 53 vm_page_t m; 54 size_t size; 55 int i; 56 57 if (bo->cdev_pager == NULL) 58 return; 59 60 size = round_page(bo->gem_obj.size); 61 if (bo->vbase != 0) 62 pmap_qremove(bo->vbase, bo->npages); 63 64 VM_OBJECT_WLOCK(bo->cdev_pager); 65 for (i = 0; i < bo->npages; i++) { 66 m = bo->m[i]; 67 cdev_pager_free_page(bo->cdev_pager, m); 68 vm_page_lock(m); 69 m->flags &= ~PG_FICTITIOUS; 70 vm_page_unwire(m, PQ_NONE); 71 vm_page_free(m); 72 vm_page_unlock(m); 73 } 74 VM_OBJECT_WUNLOCK(bo->cdev_pager); 75 76 vm_object_deallocate(bo->cdev_pager); 77 if (bo->vbase != 0) 78 vmem_free(kmem_arena, bo->vbase, size); 79 } 80 81 static void 82 tegra_bo_free_object(struct drm_gem_object *gem_obj) 83 { 84 struct tegra_bo *bo; 85 86 bo = container_of(gem_obj, struct tegra_bo, gem_obj); 87 drm_gem_free_mmap_offset(gem_obj); 88 drm_gem_object_release(gem_obj); 89 90 tegra_bo_destruct(bo); 91 92 free(bo->m, DRM_MEM_DRIVER); 93 free(bo, DRM_MEM_DRIVER); 94 } 95 96 static int 97 tegra_bo_alloc_contig(size_t npages, u_long alignment, vm_memattr_t memattr, 98 vm_page_t **ret_page) 99 { 100 vm_page_t m; 101 int pflags, tries, i; 102 vm_paddr_t low, high, boundary; 103 104 low = 0; 105 high = -1UL; 106 boundary = 0; 107 pflags = VM_ALLOC_NORMAL | VM_ALLOC_NOOBJ | VM_ALLOC_NOBUSY | 108 VM_ALLOC_WIRED | VM_ALLOC_ZERO; 109 tries = 0; 110 retry: 111 m = vm_page_alloc_contig(NULL, 0, pflags, npages, low, high, alignment, 112 boundary, memattr); 113 if (m == NULL) { 114 if (tries < 3) { 115 if (!vm_page_reclaim_contig(pflags, npages, low, high, 116 alignment, boundary)) 117 vm_wait(NULL); 118 tries++; 119 goto retry; 120 } 121 return (ENOMEM); 122 } 123 124 for (i = 0; i < npages; i++, m++) { 125 if ((m->flags & PG_ZERO) == 0) 126 pmap_zero_page(m); 127 m->valid = VM_PAGE_BITS_ALL; 128 (*ret_page)[i] = m; 129 } 130 131 return (0); 132 } 133 134 /* Initialize pager and insert all object pages to it*/ 135 static int 136 tegra_bo_init_pager(struct tegra_bo *bo) 137 { 138 vm_page_t m; 139 size_t size; 140 int i; 141 142 size = round_page(bo->gem_obj.size); 143 144 bo->pbase = VM_PAGE_TO_PHYS(bo->m[0]); 145 if (vmem_alloc(kmem_arena, size, M_WAITOK | M_BESTFIT, &bo->vbase)) 146 return (ENOMEM); 147 148 VM_OBJECT_WLOCK(bo->cdev_pager); 149 for (i = 0; i < bo->npages; i++) { 150 m = bo->m[i]; 151 /* 152 * XXX This is a temporary hack. 153 * We need pager suitable for paging (mmap) managed 154 * real (non-fictitious) pages. 155 * - managed pages are needed for clean module unload. 156 * - aliasing fictitious page to real one is bad, 157 * pmap cannot handle this situation without issues 158 * It expects that 159 * paddr = PHYS_TO_VM_PAGE(VM_PAGE_TO_PHYS(paddr)) 160 * for every single page passed to pmap. 161 */ 162 m->oflags &= ~VPO_UNMANAGED; 163 m->flags |= PG_FICTITIOUS; 164 if (vm_page_insert(m, bo->cdev_pager, i) != 0) 165 return (EINVAL); 166 } 167 VM_OBJECT_WUNLOCK(bo->cdev_pager); 168 169 pmap_qenter(bo->vbase, bo->m, bo->npages); 170 return (0); 171 } 172 173 /* Allocate memory for frame buffer */ 174 static int 175 tegra_bo_alloc(struct drm_device *drm, struct tegra_bo *bo) 176 { 177 size_t size; 178 int rv; 179 180 size = bo->gem_obj.size; 181 182 bo->npages = atop(size); 183 bo->m = malloc(sizeof(vm_page_t *) * bo->npages, DRM_MEM_DRIVER, 184 M_WAITOK | M_ZERO); 185 186 rv = tegra_bo_alloc_contig(bo->npages, PAGE_SIZE, 187 VM_MEMATTR_WRITE_COMBINING, &(bo->m)); 188 if (rv != 0) { 189 DRM_WARNING("Cannot allocate memory for gem object.\n"); 190 return (rv); 191 } 192 rv = tegra_bo_init_pager(bo); 193 if (rv != 0) { 194 DRM_WARNING("Cannot initialize gem object pager.\n"); 195 return (rv); 196 } 197 return (0); 198 } 199 200 int 201 tegra_bo_create(struct drm_device *drm, size_t size, struct tegra_bo **res_bo) 202 { 203 struct tegra_bo *bo; 204 int rv; 205 206 if (size <= 0) 207 return (-EINVAL); 208 209 bo = malloc(sizeof(*bo), DRM_MEM_DRIVER, M_WAITOK | M_ZERO); 210 211 size = round_page(size); 212 rv = drm_gem_object_init(drm, &bo->gem_obj, size); 213 if (rv != 0) { 214 free(bo, DRM_MEM_DRIVER); 215 return (rv); 216 } 217 rv = drm_gem_create_mmap_offset(&bo->gem_obj); 218 if (rv != 0) { 219 drm_gem_object_release(&bo->gem_obj); 220 free(bo, DRM_MEM_DRIVER); 221 return (rv); 222 } 223 224 bo->cdev_pager = cdev_pager_allocate(&bo->gem_obj, OBJT_MGTDEVICE, 225 drm->driver->gem_pager_ops, size, 0, 0, NULL); 226 rv = tegra_bo_alloc(drm, bo); 227 if (rv != 0) { 228 tegra_bo_free_object(&bo->gem_obj); 229 return (rv); 230 } 231 232 *res_bo = bo; 233 return (0); 234 } 235 236 237 238 static int 239 tegra_bo_create_with_handle(struct drm_file *file, struct drm_device *drm, 240 size_t size, uint32_t *handle, struct tegra_bo **res_bo) 241 { 242 int rv; 243 struct tegra_bo *bo; 244 245 rv = tegra_bo_create(drm, size, &bo); 246 if (rv != 0) 247 return (rv); 248 249 rv = drm_gem_handle_create(file, &bo->gem_obj, handle); 250 if (rv != 0) { 251 tegra_bo_free_object(&bo->gem_obj); 252 drm_gem_object_release(&bo->gem_obj); 253 return (rv); 254 } 255 256 drm_gem_object_unreference_unlocked(&bo->gem_obj); 257 258 *res_bo = bo; 259 return (0); 260 } 261 262 static int 263 tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm_dev, 264 struct drm_mode_create_dumb *args) 265 { 266 struct tegra_drm *drm; 267 struct tegra_bo *bo; 268 int rv; 269 270 drm = container_of(drm_dev, struct tegra_drm, drm_dev); 271 272 args->pitch= (args->width * args->bpp + 7) / 8; 273 args->pitch = roundup(args->pitch, drm->pitch_align); 274 args->size = args->pitch * args->height; 275 rv = tegra_bo_create_with_handle(file, drm_dev, args->size, 276 &args->handle, &bo); 277 278 return (rv); 279 } 280 281 static int 282 tegra_bo_dumb_map_offset(struct drm_file *file_priv, 283 struct drm_device *drm_dev, uint32_t handle, uint64_t *offset) 284 { 285 struct drm_gem_object *gem_obj; 286 int rv; 287 288 DRM_LOCK(drm_dev); 289 gem_obj = drm_gem_object_lookup(drm_dev, file_priv, handle); 290 if (gem_obj == NULL) { 291 device_printf(drm_dev->dev, "Object not found\n"); 292 DRM_UNLOCK(drm_dev); 293 return (-EINVAL); 294 } 295 rv = drm_gem_create_mmap_offset(gem_obj); 296 if (rv != 0) 297 goto fail; 298 299 *offset = DRM_GEM_MAPPING_OFF(gem_obj->map_list.key) | 300 DRM_GEM_MAPPING_KEY; 301 302 drm_gem_object_unreference(gem_obj); 303 DRM_UNLOCK(drm_dev); 304 return (0); 305 306 fail: 307 drm_gem_object_unreference(gem_obj); 308 DRM_UNLOCK(drm_dev); 309 return (rv); 310 } 311 312 static int 313 tegra_bo_dumb_destroy(struct drm_file *file_priv, struct drm_device *drm_dev, 314 unsigned int handle) 315 { 316 int rv; 317 318 rv = drm_gem_handle_delete(file_priv, handle); 319 return (rv); 320 } 321 322 /* 323 * mmap support 324 */ 325 static int 326 tegra_gem_pager_fault(vm_object_t vm_obj, vm_ooffset_t offset, int prot, 327 vm_page_t *mres) 328 { 329 330 #ifdef DRM_PAGER_DEBUG 331 DRM_DEBUG("object %p offset %jd prot %d mres %p\n", 332 vm_obj, (intmax_t)offset, prot, mres); 333 #endif 334 return (VM_PAGER_FAIL); 335 336 } 337 338 static int 339 tegra_gem_pager_ctor(void *handle, vm_ooffset_t size, vm_prot_t prot, 340 vm_ooffset_t foff, struct ucred *cred, u_short *color) 341 { 342 343 if (color != NULL) 344 *color = 0; 345 return (0); 346 } 347 348 static void 349 tegra_gem_pager_dtor(void *handle) 350 { 351 352 } 353 354 static struct cdev_pager_ops tegra_gem_pager_ops = { 355 .cdev_pg_fault = tegra_gem_pager_fault, 356 .cdev_pg_ctor = tegra_gem_pager_ctor, 357 .cdev_pg_dtor = tegra_gem_pager_dtor 358 }; 359 360 /* Fill up relevant fields in drm_driver ops */ 361 void 362 tegra_bo_driver_register(struct drm_driver *drm_drv) 363 { 364 drm_drv->gem_free_object = tegra_bo_free_object; 365 drm_drv->gem_pager_ops = &tegra_gem_pager_ops; 366 drm_drv->dumb_create = tegra_bo_dumb_create; 367 drm_drv->dumb_map_offset = tegra_bo_dumb_map_offset; 368 drm_drv->dumb_destroy = tegra_bo_dumb_destroy; 369 } 370