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