drm_pci.c revision 1.1.2.7
1 /* $NetBSD: drm_pci.c,v 1.1.2.7 2013/07/24 03:58:51 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 1.1.2.7 2013/07/24 03:58:51 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 static int drm_pci_agp_init(struct drm_device *); 57 58 const struct drm_bus drm_pci_bus = { 59 .bus_type = DRIVER_BUS_PCI, 60 .get_irq = drm_pci_get_irq, 61 .irq_install = drm_pci_irq_install, 62 .irq_uninstall = drm_pci_irq_uninstall, 63 .get_name = drm_pci_get_name, 64 .set_busid = drm_pci_set_busid, 65 .set_unique = drm_pci_set_unique, 66 .irq_by_busid = drm_pci_irq_by_busid, 67 .agp_init = drm_pci_agp_init, 68 }; 69 70 static const struct pci_attach_args * 71 drm_pci_attach_args(struct drm_device *dev) 72 { 73 return &dev->pdev->pd_pa; 74 } 75 76 int 77 drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver __unused) 78 { 79 80 driver->bus = &drm_pci_bus; 81 return 0; 82 } 83 84 void 85 drm_pci_exit(struct drm_driver *driver __unused, 86 struct pci_driver *pdriver __unused) 87 { 88 } 89 90 /* XXX Should go elsewhere. */ 91 #define PCI_NMAPREGS ((PCI_MAPREG_END - PCI_MAPREG_START) / 4) 92 93 void 94 drm_pci_attach(device_t self, const struct pci_attach_args *pa, 95 struct pci_dev *pdev, struct drm_device *dev) 96 { 97 unsigned int unit; 98 99 linux_pci_dev_init(pdev, self, pa, 0); 100 101 dev->pdev = pdev; 102 dev->pci_vendor = pdev->vendor; 103 dev->pci_device = pdev->device; 104 105 /* XXX Set the power state to D0? */ 106 107 dev->bst = pa->pa_memt; 108 dev->bus_dmat = pa->pa_dmat; /* XXX dmat64? */ 109 dev->dmat_subregion_p = false; 110 111 CTASSERT(PCI_NMAPREGS < (SIZE_MAX / sizeof(dev->bus_maps[0]))); 112 dev->bus_nmaps = PCI_NMAPREGS; 113 dev->bus_maps = kmem_zalloc((PCI_NMAPREGS * sizeof(dev->bus_maps[0])), 114 KM_SLEEP); 115 for (unit = 0; unit < dev->bus_nmaps; unit++) { 116 struct drm_bus_map *const bm = &dev->bus_maps[unit]; 117 const int reg = (PCI_MAPREG_START + (unit*4)); 118 const pcireg_t type = 119 pci_mapreg_type(pa->pa_pc, pa->pa_tag, reg); 120 121 /* Reject non-memory mappings. */ 122 if ((type & PCI_MAPREG_TYPE_MEM) != PCI_MAPREG_TYPE_MEM) { 123 aprint_debug_dev(self, "map %u has non-memory type:" 124 " 0x%"PRIxMAX"\n", unit, (uintmax_t)type); 125 continue; 126 } 127 128 /* Inquire about it. We'll map it in drm_ioremap. */ 129 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, type, 130 &bm->bm_base, &bm->bm_size, &bm->bm_flags) != 0) { 131 aprint_debug_dev(self, "map %u failed\n", unit); 132 continue; 133 } 134 135 aprint_debug_dev(self, "map %u at %"PRIxMAX" size %"PRIxMAX 136 " flags 0x%"PRIxMAX"\n", 137 unit, (uintmax_t)bm->bm_base, (uintmax_t)bm->bm_size, 138 (uintmax_t)bm->bm_flags); 139 140 /* Assume since it is a memory mapping it can be linear. */ 141 bm->bm_flags |= BUS_SPACE_MAP_LINEAR; 142 } 143 144 /* All `agp' maps are just initialized to zero. */ 145 CTASSERT(PCI_NMAPREGS < (SIZE_MAX / sizeof(dev->agp_maps[0]))); 146 dev->agp_nmaps = PCI_NMAPREGS; 147 dev->agp_maps = kmem_zalloc((PCI_NMAPREGS * sizeof(dev->agp_maps[0])), 148 KM_SLEEP); 149 } 150 151 int 152 drm_pci_detach(struct drm_device *dev __unused, int flags __unused) 153 { 154 155 kmem_free(dev->bus_maps, (PCI_NMAPREGS * sizeof(dev->bus_maps[0]))); 156 kmem_free(dev->agp_maps, (PCI_NMAPREGS * sizeof(dev->agp_maps[0]))); 157 158 /* 159 * XXX This is the wrong place! Should be a routine in 160 * drm_memory.c. 161 */ 162 if (dev->dmat_subregion_p) 163 bus_dmatag_destroy(dev->dmat); 164 165 /* XXX Disestablish irqs or anything? */ 166 return 0; 167 } 168 169 static int 170 drm_pci_get_irq(struct drm_device *dev) 171 { 172 pci_intr_handle_t ih_pih; 173 int ih_int; 174 175 /* 176 * This is a compile-time assertion that the types match. If 177 * this fails, we have to change a bunch of drm code that uses 178 * int for intr handles. 179 */ 180 KASSERT(&ih_pih != &ih_int); 181 182 if (pci_intr_map(drm_pci_attach_args(dev), &ih_pih)) 183 return -1; /* XXX Hope -1 is an invalid intr handle. */ 184 185 ih_int = ih_pih; 186 return ih_int; 187 } 188 189 static int 190 drm_pci_irq_install(struct drm_device *dev, irqreturn_t (*handler)(void *), 191 int flags, const char *name, void *arg, 192 struct drm_bus_irq_cookie **cookiep) 193 { 194 const struct pci_attach_args *const pa = drm_pci_attach_args(dev); 195 pci_intr_handle_t ih; 196 const char *intrstr; 197 void *ih_cookie; 198 199 if (pci_intr_map(pa, &ih)) 200 return -ENOENT; 201 202 intrstr = pci_intr_string(pa->pa_pc, ih); 203 ih_cookie = pci_intr_establish(pa->pa_pc, ih, IPL_DRM, handler, arg); 204 if (ih_cookie == NULL) { 205 aprint_error_dev(dev->dev, 206 "couldn't establish interrupt at %s (%s)\n", 207 intrstr, name); 208 return -ENOENT; 209 } 210 211 aprint_normal_dev(dev->dev, "interrupting at %s (%s)\n", 212 intrstr, name); 213 *cookiep = (struct drm_bus_irq_cookie *)ih_cookie; 214 return 0; 215 } 216 217 static void 218 drm_pci_irq_uninstall(struct drm_device *dev, 219 struct drm_bus_irq_cookie *cookie) 220 { 221 const struct pci_attach_args *pa = drm_pci_attach_args(dev); 222 223 pci_intr_disestablish(pa->pa_pc, (void *)cookie); 224 } 225 226 static const char * 227 drm_pci_get_name(struct drm_device *dev) 228 { 229 return "pci"; /* XXX PCI bus names? */ 230 } 231 232 static int 233 drm_pci_set_busid(struct drm_device *dev, struct drm_master *master) 234 { 235 return -ENOSYS; /* XXX PCI bus ids? */ 236 } 237 238 static int 239 drm_pci_set_unique(struct drm_device *dev, struct drm_master *master, 240 struct drm_unique *unique) 241 { 242 return -ENOSYS; /* XXX */ 243 } 244 245 static int 246 drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *busid) 247 { 248 return -ENOSYS; /* XXX */ 249 } 250 251 static int 252 drm_pci_agp_init(struct drm_device *dev) 253 { 254 return 0; /* XXX */ 255 } 256
Indexes created Thu Oct 02 14:10:14 GMT 2025