drm_pci.c revision 1.12
1 /* $NetBSD: drm_pci.c,v 1.12 2015/03/06 13:44:18 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 1.12 2015/03/06 13:44:18 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 pdev->pd_drm_dev = dev; /* XXX Nouveau kludge. */ 115 116 /* XXX Set the power state to D0? */ 117 118 /* Set up the bus space and bus DMA tags. */ 119 dev->bst = pa->pa_memt; 120 /* XXX Let the driver say something about 32-bit vs 64-bit DMA? */ 121 dev->bus_dmat = (pci_dma64_available(pa)? pa->pa_dmat64 : pa->pa_dmat); 122 dev->dmat = dev->bus_dmat; 123 dev->dmat_subregion_p = false; 124 125 /* Find all the memory maps. */ 126 CTASSERT(PCI_NUM_RESOURCES < (SIZE_MAX / sizeof(dev->bus_maps[0]))); 127 dev->bus_maps = kmem_zalloc(PCI_NUM_RESOURCES * 128 sizeof(dev->bus_maps[0]), KM_SLEEP); 129 dev->bus_nmaps = PCI_NUM_RESOURCES; 130 for (unit = 0; unit < PCI_NUM_RESOURCES; unit++) { 131 struct drm_bus_map *const bm = &dev->bus_maps[unit]; 132 const int reg = PCI_BAR(unit); 133 const pcireg_t type = 134 pci_mapreg_type(pa->pa_pc, pa->pa_tag, reg); 135 136 /* Reject non-memory mappings. */ 137 if ((type & PCI_MAPREG_TYPE_MEM) != PCI_MAPREG_TYPE_MEM) { 138 aprint_debug_dev(self, "map %u has non-memory type:" 139 " 0x%"PRIxMAX"\n", unit, (uintmax_t)type); 140 continue; 141 } 142 143 /* Inquire about it. We'll map it in drm_ioremap. */ 144 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, type, 145 &bm->bm_base, &bm->bm_size, &bm->bm_flags) != 0) { 146 aprint_debug_dev(self, "map %u failed\n", unit); 147 continue; 148 } 149 150 /* Assume since it is a memory mapping it can be linear. */ 151 bm->bm_flags |= BUS_SPACE_MAP_LINEAR; 152 } 153 154 /* Set up AGP stuff if requested. */ 155 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) { 156 if (drm_pci_device_is_agp(dev)) 157 dev->agp = drm_agp_init(dev); 158 if (dev->agp) 159 dev->agp->agp_mtrr = arch_phys_wc_add(dev->agp->base, 160 dev->agp->agp_info.aki_info.ai_aperture_size); 161 } 162 163 /* Register the DRM device and do driver-specific initialization. */ 164 ret = drm_dev_register(dev, cookie); 165 if (ret) 166 goto fail1; 167 168 /* Success! */ 169 *devp = dev; 170 return 0; 171 172 fail2: __unused 173 drm_dev_unregister(dev); 174 fail1: drm_pci_agp_destroy(dev); 175 dev->bus_nmaps = 0; 176 kmem_free(dev->bus_maps, PCI_NUM_RESOURCES * sizeof(dev->bus_maps[0])); 177 if (dev->dmat_subregion_p) 178 bus_dmatag_destroy(dev->dmat); 179 drm_dev_unref(dev); 180 fail0: return ret; 181 } 182 183 int 184 drm_pci_detach(struct drm_device *dev, int flags __unused) 185 { 186 187 /* Do driver-specific detachment and unregister the device. */ 188 drm_dev_unregister(dev); 189 190 /* Tear down AGP stuff if necessary. */ 191 drm_pci_agp_destroy(dev); 192 193 /* Free the record of available bus space mappings. */ 194 dev->bus_nmaps = 0; 195 kmem_free(dev->bus_maps, PCI_NUM_RESOURCES * sizeof(dev->bus_maps[0])); 196 197 /* Tear down bus space and bus DMA tags. */ 198 if (dev->dmat_subregion_p) 199 bus_dmatag_destroy(dev->dmat); 200 201 drm_dev_unref(dev); 202 203 return 0; 204 } 205 206 void 207 drm_pci_agp_destroy(struct drm_device *dev) 208 { 209 210 if (dev->agp) { 211 arch_phys_wc_del(dev->agp->agp_mtrr); 212 drm_agp_clear(dev); 213 kfree(dev->agp); /* XXX Should go in drm_agp_clear... */ 214 dev->agp = NULL; 215 } 216 } 217 218 static int 219 drm_pci_get_irq(struct drm_device *dev) 220 { 221 222 /* 223 * Caller expects a nonzero int, and doesn't really use it for 224 * anything, so no need to pci_intr_map here. 225 */ 226 return dev->pdev->pd_pa.pa_intrpin; 227 } 228 229 static int 230 drm_pci_irq_install(struct drm_device *dev, irqreturn_t (*handler)(void *), 231 int flags, const char *name, void *arg, 232 struct drm_bus_irq_cookie **cookiep) 233 { 234 const struct pci_attach_args *const pa = drm_pci_attach_args(dev); 235 pci_intr_handle_t ih; 236 const char *intrstr; 237 void *ih_cookie; 238 char intrbuf[PCI_INTRSTR_LEN]; 239 240 if (pci_intr_map(pa, &ih)) 241 return -ENOENT; 242 243 intrstr = pci_intr_string(pa->pa_pc, ih, intrbuf, sizeof(intrbuf)); 244 ih_cookie = pci_intr_establish(pa->pa_pc, ih, IPL_DRM, handler, arg); 245 if (ih_cookie == NULL) { 246 aprint_error_dev(dev->dev, 247 "couldn't establish interrupt at %s (%s)\n", 248 intrstr, name); 249 return -ENOENT; 250 } 251 252 aprint_normal_dev(dev->dev, "interrupting at %s (%s)\n", 253 intrstr, name); 254 *cookiep = (struct drm_bus_irq_cookie *)ih_cookie; 255 return 0; 256 } 257 258 static void 259 drm_pci_irq_uninstall(struct drm_device *dev, 260 struct drm_bus_irq_cookie *cookie) 261 { 262 const struct pci_attach_args *pa = drm_pci_attach_args(dev); 263 264 pci_intr_disestablish(pa->pa_pc, (void *)cookie); 265 } 266 267 static const char * 268 drm_pci_get_name(struct drm_device *dev) 269 { 270 return "pci"; /* XXX PCI bus names? */ 271 } 272 273 static int 274 drm_pci_format_unique(struct drm_device *dev, char *buf, size_t size) 275 { 276 const unsigned int domain = device_unit(device_parent(dev->dev)); 277 const unsigned int bus = dev->pdev->pd_pa.pa_bus; 278 const unsigned int device = dev->pdev->pd_pa.pa_device; 279 const unsigned int function = dev->pdev->pd_pa.pa_function; 280 281 return snprintf(buf, size, "pci:%04x:%02x:%02x.%d", 282 domain, bus, device, function); 283 } 284 285 static int 286 drm_pci_format_devname(struct drm_device *dev, const char *unique, 287 char *buf, size_t size) 288 { 289 290 return snprintf(buf, size, "%s@%s", 291 device_xname(device_parent(dev->dev)), 292 unique); 293 } 294 295 static int 296 drm_pci_set_busid(struct drm_device *dev, struct drm_master *master) 297 { 298 int n; 299 char *buf; 300 301 n = drm_pci_format_unique(dev, NULL, 0); 302 if (n < 0) 303 return -ENOSPC; /* XXX */ 304 if (0xff < n) 305 n = 0xff; 306 307 buf = kzalloc(n + 1, GFP_KERNEL); 308 (void)drm_pci_format_unique(dev, buf, n + 1); 309 310 if (master->unique) 311 kfree(master->unique); 312 master->unique = buf; 313 master->unique_len = n; 314 master->unique_size = n + 1; 315 316 n = drm_pci_format_devname(dev, master->unique, NULL, 0); 317 if (n < 0) 318 return -ENOSPC; /* XXX back out? */ 319 if (0xff < n) 320 n = 0xff; 321 322 buf = kzalloc(n + 1, GFP_KERNEL); 323 (void)drm_pci_format_devname(dev, master->unique, buf, n + 1); 324 325 if (dev->devname) 326 kfree(dev->devname); 327 dev->devname = buf; 328 329 return 0; 330 } 331 332 static int 333 drm_pci_set_unique(struct drm_device *dev, struct drm_master *master, 334 struct drm_unique *unique __unused) 335 { 336 337 /* 338 * XXX This is silly. We're supposed to reject unique names 339 * that don't match the ones we would generate anyway. For 340 * expedience, we'll just generate the one we would and ignore 341 * whatever userland threw at us... 342 */ 343 return drm_pci_set_busid(dev, master); 344 } 345 346 static int 347 drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *busid) 348 { 349 return -ENOSYS; /* XXX */ 350 } 351
Indexes created Wed Sep 24 14:09:57 GMT 2025