drm_pci.c revision 1.10
1 /* $NetBSD: drm_pci.c,v 1.10 2015/03/06 01:24:24 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Taylor R. Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: drm_pci.c,v 1.10 2015/03/06 01:24:24 riastradh Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/errno.h> 37 #include <sys/systm.h> 38 39 #include <dev/pci/pcivar.h> 40 41 #include <drm/drmP.h> 42 43 static int drm_pci_get_irq(struct drm_device *); 44 static int drm_pci_irq_install(struct drm_device *, 45 irqreturn_t (*)(void *), int, const char *, void *, 46 struct drm_bus_irq_cookie **); 47 static void drm_pci_irq_uninstall(struct drm_device *, 48 struct drm_bus_irq_cookie *); 49 static const char * 50 drm_pci_get_name(struct drm_device *); 51 static int drm_pci_set_busid(struct drm_device *, struct drm_master *); 52 static int drm_pci_set_unique(struct drm_device *, struct drm_master *, 53 struct drm_unique *); 54 static int drm_pci_irq_by_busid(struct drm_device *, 55 struct drm_irq_busid *); 56 57 const struct drm_bus drm_pci_bus = { 58 .bus_type = DRIVER_BUS_PCI, 59 .get_irq = drm_pci_get_irq, 60 .irq_install = drm_pci_irq_install, 61 .irq_uninstall = drm_pci_irq_uninstall, 62 .get_name = drm_pci_get_name, 63 .set_busid = drm_pci_set_busid, 64 .set_unique = drm_pci_set_unique, 65 .irq_by_busid = drm_pci_irq_by_busid, 66 }; 67 68 static const struct pci_attach_args * 69 drm_pci_attach_args(struct drm_device *dev) 70 { 71 return &dev->pdev->pd_pa; 72 } 73 74 int 75 drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver __unused) 76 { 77 78 driver->bus = &drm_pci_bus; 79 return 0; 80 } 81 82 void 83 drm_pci_exit(struct drm_driver *driver __unused, 84 struct pci_driver *pdriver __unused) 85 { 86 } 87 88 int 89 drm_pci_attach(device_t self, const struct pci_attach_args *pa, 90 struct pci_dev *pdev, struct drm_driver *driver, unsigned long cookie, 91 struct drm_device **devp) 92 { 93 struct drm_device *dev; 94 unsigned int unit; 95 int ret; 96 97 /* Ensure the drm agp hooks are installed. */ 98 /* XXX errno NetBSD->Linux */ 99 ret = -drmkms_pci_agp_guarantee_initialized(); 100 if (ret) 101 goto fail0; 102 103 /* Initialize the Linux PCI device descriptor. */ 104 linux_pci_dev_init(pdev, self, pa, 0); 105 106 /* Create a DRM device. */ 107 dev = drm_dev_alloc(driver, self); 108 if (dev == NULL) { 109 ret = -ENOMEM; 110 goto fail0; 111 } 112 113 dev->pdev = pdev; 114 115 /* XXX Set the power state to D0? */ 116 117 /* Set up the bus space and bus DMA tags. */ 118 dev->bst = pa->pa_memt; 119 /* XXX Let the driver say something about 32-bit vs 64-bit DMA? */ 120 dev->bus_dmat = (pci_dma64_available(pa)? pa->pa_dmat64 : pa->pa_dmat); 121 dev->dmat = dev->bus_dmat; 122 dev->dmat_subregion_p = false; 123 124 /* Find all the memory maps. */ 125 CTASSERT(PCI_NUM_RESOURCES < (SIZE_MAX / sizeof(dev->bus_maps[0]))); 126 dev->bus_maps = kmem_zalloc(PCI_NUM_RESOURCES * 127 sizeof(dev->bus_maps[0]), KM_SLEEP); 128 dev->bus_nmaps = PCI_NUM_RESOURCES; 129 for (unit = 0; unit < PCI_NUM_RESOURCES; unit++) { 130 struct drm_bus_map *const bm = &dev->bus_maps[unit]; 131 const int reg = PCI_BAR(unit); 132 const pcireg_t type = 133 pci_mapreg_type(pa->pa_pc, pa->pa_tag, reg); 134 135 /* Reject non-memory mappings. */ 136 if ((type & PCI_MAPREG_TYPE_MEM) != PCI_MAPREG_TYPE_MEM) { 137 aprint_debug_dev(self, "map %u has non-memory type:" 138 " 0x%"PRIxMAX"\n", unit, (uintmax_t)type); 139 continue; 140 } 141 142 /* Inquire about it. We'll map it in drm_ioremap. */ 143 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, type, 144 &bm->bm_base, &bm->bm_size, &bm->bm_flags) != 0) { 145 aprint_debug_dev(self, "map %u failed\n", unit); 146 continue; 147 } 148 149 /* Assume since it is a memory mapping it can be linear. */ 150 bm->bm_flags |= BUS_SPACE_MAP_LINEAR; 151 } 152 153 /* Set up AGP stuff if requested. */ 154 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) { 155 if (drm_pci_device_is_agp(dev)) 156 dev->agp = drm_agp_init(dev); 157 if (dev->agp) 158 dev->agp->agp_mtrr = arch_phys_wc_add(dev->agp->base, 159 dev->agp->agp_info.aki_info.ai_aperture_size); 160 } 161 162 /* Register the DRM device and do driver-specific initialization. */ 163 ret = drm_dev_register(dev, cookie); 164 if (ret) 165 goto fail1; 166 167 /* Success! */ 168 *devp = dev; 169 return 0; 170 171 fail2: __unused 172 drm_dev_unregister(dev); 173 fail1: drm_pci_agp_destroy(dev); 174 dev->bus_nmaps = 0; 175 kmem_free(dev->bus_maps, PCI_NUM_RESOURCES * sizeof(dev->bus_maps[0])); 176 if (dev->dmat_subregion_p) 177 bus_dmatag_destroy(dev->dmat); 178 drm_dev_unref(dev); 179 fail0: return ret; 180 } 181 182 int 183 drm_pci_detach(struct drm_device *dev, int flags __unused) 184 { 185 186 /* Do driver-specific detachment and unregister the device. */ 187 drm_dev_unregister(dev); 188 189 /* Tear down AGP stuff if necessary. */ 190 drm_pci_agp_destroy(dev); 191 192 /* Free the record of available bus space mappings. */ 193 dev->bus_nmaps = 0; 194 kmem_free(dev->bus_maps, PCI_NUM_RESOURCES * sizeof(dev->bus_maps[0])); 195 196 /* Tear down bus space and bus DMA tags. */ 197 if (dev->dmat_subregion_p) 198 bus_dmatag_destroy(dev->dmat); 199 200 drm_dev_unref(dev); 201 202 return 0; 203 } 204 205 void 206 drm_pci_agp_destroy(struct drm_device *dev) 207 { 208 209 if (dev->agp) { 210 arch_phys_wc_del(dev->agp->agp_mtrr); 211 drm_agp_clear(dev); 212 kfree(dev->agp); /* XXX Should go in drm_agp_clear... */ 213 dev->agp = NULL; 214 } 215 } 216 217 static int 218 drm_pci_get_irq(struct drm_device *dev) 219 { 220 pci_intr_handle_t ih_pih; 221 int ih_int; 222 223 /* 224 * This is a compile-time assertion that the types match. If 225 * this fails, we have to change a bunch of drm code that uses 226 * int for intr handles. 227 */ 228 KASSERT(&ih_pih != &ih_int); 229 230 if (pci_intr_map(drm_pci_attach_args(dev), &ih_pih)) 231 return -1; /* XXX Hope -1 is an invalid intr handle. */ 232 233 ih_int = ih_pih; 234 return ih_int; 235 } 236 237 static int 238 drm_pci_irq_install(struct drm_device *dev, irqreturn_t (*handler)(void *), 239 int flags, const char *name, void *arg, 240 struct drm_bus_irq_cookie **cookiep) 241 { 242 const struct pci_attach_args *const pa = drm_pci_attach_args(dev); 243 pci_intr_handle_t ih; 244 const char *intrstr; 245 void *ih_cookie; 246 char intrbuf[PCI_INTRSTR_LEN]; 247 248 if (pci_intr_map(pa, &ih)) 249 return -ENOENT; 250 251 intrstr = pci_intr_string(pa->pa_pc, ih, intrbuf, sizeof(intrbuf)); 252 ih_cookie = pci_intr_establish(pa->pa_pc, ih, IPL_DRM, handler, arg); 253 if (ih_cookie == NULL) { 254 aprint_error_dev(dev->dev, 255 "couldn't establish interrupt at %s (%s)\n", 256 intrstr, name); 257 return -ENOENT; 258 } 259 260 aprint_normal_dev(dev->dev, "interrupting at %s (%s)\n", 261 intrstr, name); 262 *cookiep = (struct drm_bus_irq_cookie *)ih_cookie; 263 return 0; 264 } 265 266 static void 267 drm_pci_irq_uninstall(struct drm_device *dev, 268 struct drm_bus_irq_cookie *cookie) 269 { 270 const struct pci_attach_args *pa = drm_pci_attach_args(dev); 271 272 pci_intr_disestablish(pa->pa_pc, (void *)cookie); 273 } 274 275 static const char * 276 drm_pci_get_name(struct drm_device *dev) 277 { 278 return "pci"; /* XXX PCI bus names? */ 279 } 280 281 static int 282 drm_pci_format_unique(struct drm_device *dev, char *buf, size_t size) 283 { 284 const unsigned int domain = device_unit(device_parent(dev->dev)); 285 const unsigned int bus = dev->pdev->pd_pa.pa_bus; 286 const unsigned int device = dev->pdev->pd_pa.pa_device; 287 const unsigned int function = dev->pdev->pd_pa.pa_function; 288 289 return snprintf(buf, size, "pci:%04x:%02x:%02x.%d", 290 domain, bus, device, function); 291 } 292 293 static int 294 drm_pci_format_devname(struct drm_device *dev, const char *unique, 295 char *buf, size_t size) 296 { 297 298 return snprintf(buf, size, "%s@%s", 299 device_xname(device_parent(dev->dev)), 300 unique); 301 } 302 303 static int 304 drm_pci_set_busid(struct drm_device *dev, struct drm_master *master) 305 { 306 int n; 307 char *buf; 308 309 n = drm_pci_format_unique(dev, NULL, 0); 310 if (n < 0) 311 return -ENOSPC; /* XXX */ 312 if (0xff < n) 313 n = 0xff; 314 315 buf = kzalloc(n + 1, GFP_KERNEL); 316 (void)drm_pci_format_unique(dev, buf, n + 1); 317 318 if (master->unique) 319 kfree(master->unique); 320 master->unique = buf; 321 master->unique_len = n; 322 master->unique_size = n + 1; 323 324 n = drm_pci_format_devname(dev, master->unique, NULL, 0); 325 if (n < 0) 326 return -ENOSPC; /* XXX back out? */ 327 if (0xff < n) 328 n = 0xff; 329 330 buf = kzalloc(n + 1, GFP_KERNEL); 331 (void)drm_pci_format_devname(dev, master->unique, buf, n + 1); 332 333 if (dev->devname) 334 kfree(dev->devname); 335 dev->devname = buf; 336 337 return 0; 338 } 339 340 static int 341 drm_pci_set_unique(struct drm_device *dev, struct drm_master *master, 342 struct drm_unique *unique __unused) 343 { 344 345 /* 346 * XXX This is silly. We're supposed to reject unique names 347 * that don't match the ones we would generate anyway. For 348 * expedience, we'll just generate the one we would and ignore 349 * whatever userland threw at us... 350 */ 351 return drm_pci_set_busid(dev, master); 352 } 353 354 static int 355 drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *busid) 356 { 357 return -ENOSYS; /* XXX */ 358 } 359
Indexes created Mon Sep 22 05:09:51 GMT 2025