i915_pci_autoconf.c revision 1.9
1 /* $NetBSD: i915_pci_autoconf.c,v 1.9 2021/12/19 11:54:10 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: i915_pci_autoconf.c,v 1.9 2021/12/19 11:54:10 riastradh Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/queue.h> 37 #include <sys/systm.h> 38 #include <sys/queue.h> 39 #include <sys/workqueue.h> 40 41 #include <drm/drm_pci.h> 42 43 #include "i915_drv.h" 44 #include "i915_pci.h" 45 46 struct drm_device; 47 48 SIMPLEQ_HEAD(i915drmkms_task_head, i915drmkms_task); 49 50 struct i915drmkms_softc { 51 device_t sc_dev; 52 struct pci_attach_args sc_pa; 53 enum { 54 I915DRMKMS_TASK_ATTACH, 55 I915DRMKMS_TASK_WORKQUEUE, 56 } sc_task_state; 57 union { 58 struct workqueue *workqueue; 59 struct i915drmkms_task_head attach; 60 } sc_task_u; 61 struct drm_device *sc_drm_dev; 62 struct pci_dev sc_pci_dev; 63 bool sc_pci_attached; 64 bool sc_dev_registered; 65 }; 66 67 static const struct pci_device_id * 68 i915drmkms_pci_lookup(const struct pci_attach_args *); 69 70 static int i915drmkms_match(device_t, cfdata_t, void *); 71 static void i915drmkms_attach(device_t, device_t, void *); 72 static void i915drmkms_attach_real(device_t); 73 static int i915drmkms_detach(device_t, int); 74 75 static bool i915drmkms_suspend(device_t, const pmf_qual_t *); 76 static bool i915drmkms_resume(device_t, const pmf_qual_t *); 77 78 static void i915drmkms_task_work(struct work *, void *); 79 80 CFATTACH_DECL_NEW(i915drmkms, sizeof(struct i915drmkms_softc), 81 i915drmkms_match, i915drmkms_attach, i915drmkms_detach, NULL); 82 83 /* XXX Kludge to get these from i915_pci.c. */ 84 extern const struct pci_device_id *const i915_device_ids; 85 extern const size_t i915_n_device_ids; 86 87 static const struct pci_device_id * 88 i915drmkms_pci_lookup(const struct pci_attach_args *pa) 89 { 90 size_t i; 91 92 /* Attach only at function 0 to work around Intel lossage. */ 93 if (pa->pa_function != 0) 94 return NULL; 95 96 /* We're interested only in Intel products. */ 97 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL) 98 return NULL; 99 100 /* We're interested only in Intel display devices. */ 101 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY) 102 return NULL; 103 104 for (i = 0; i < i915_n_device_ids; i++) 105 if (PCI_PRODUCT(pa->pa_id) == i915_device_ids[i].device) 106 break; 107 108 /* Did we find it? */ 109 if (i == i915_n_device_ids) 110 return NULL; 111 112 const struct pci_device_id *ent = &i915_device_ids[i]; 113 const struct intel_device_info *const info = (struct intel_device_info *) ent->driver_data; 114 115 if (info->require_force_probe) { 116 printf("i915drmkms: preliminary hardware support disabled\n"); 117 return NULL; 118 } 119 120 return ent; 121 } 122 123 static int 124 i915drmkms_match(device_t parent, cfdata_t match, void *aux) 125 { 126 extern int i915drmkms_guarantee_initialized(void); 127 const struct pci_attach_args *const pa = aux; 128 int error; 129 130 error = i915drmkms_guarantee_initialized(); 131 if (error) { 132 aprint_error("i915drmkms: failed to initialize: %d\n", error); 133 return 0; 134 } 135 136 if (i915drmkms_pci_lookup(pa) == NULL) 137 return 0; 138 139 return 6; /* XXX Beat genfb_pci... */ 140 } 141 142 static void 143 i915drmkms_attach(device_t parent, device_t self, void *aux) 144 { 145 struct i915drmkms_softc *const sc = device_private(self); 146 const struct pci_attach_args *const pa = aux; 147 148 pci_aprint_devinfo(pa, NULL); 149 150 if (!pmf_device_register(self, &i915drmkms_suspend, 151 &i915drmkms_resume)) 152 aprint_error_dev(self, "unable to establish power handler\n"); 153 154 /* 155 * Trivial initialization first; the rest will come after we 156 * have mounted the root file system and can load firmware 157 * images. 158 */ 159 sc->sc_dev = self; 160 sc->sc_pa = *pa; 161 162 config_mountroot(self, &i915drmkms_attach_real); 163 } 164 165 static void 166 i915drmkms_attach_real(device_t self) 167 { 168 struct i915drmkms_softc *const sc = device_private(self); 169 struct pci_attach_args *const pa = &sc->sc_pa; 170 const struct pci_device_id *ent = i915drmkms_pci_lookup(pa); 171 const struct intel_device_info *const info = (struct intel_device_info *) ent->driver_data; 172 int error; 173 174 KASSERT(info != NULL); 175 176 sc->sc_task_state = I915DRMKMS_TASK_ATTACH; 177 SIMPLEQ_INIT(&sc->sc_task_u.attach); 178 179 /* Initialize the Linux PCI device descriptor. */ 180 linux_pci_dev_init(&sc->sc_pci_dev, self, device_parent(self), pa, 0); 181 182 /* XXX errno Linux->NetBSD */ 183 error = -i915_driver_probe(&sc->sc_pci_dev, ent); 184 if (error) { 185 aprint_error_dev(self, "unable to register drm: %d\n", error); 186 return; 187 } 188 sc->sc_dev_registered = true; 189 sc->sc_drm_dev = pci_get_drvdata(&sc->sc_pci_dev); 190 191 while (!SIMPLEQ_EMPTY(&sc->sc_task_u.attach)) { 192 struct i915drmkms_task *const task = 193 SIMPLEQ_FIRST(&sc->sc_task_u.attach); 194 195 SIMPLEQ_REMOVE_HEAD(&sc->sc_task_u.attach, ift_u.queue); 196 (*task->ift_fn)(task); 197 } 198 199 sc->sc_task_state = I915DRMKMS_TASK_WORKQUEUE; 200 error = workqueue_create(&sc->sc_task_u.workqueue, "intelfb", 201 &i915drmkms_task_work, NULL, PRI_NONE, IPL_NONE, WQ_MPSAFE); 202 if (error) { 203 aprint_error_dev(self, "unable to create workqueue: %d\n", 204 error); 205 sc->sc_task_u.workqueue = NULL; 206 return; 207 } 208 } 209 210 static int 211 i915drmkms_detach(device_t self, int flags) 212 { 213 struct i915drmkms_softc *const sc = device_private(self); 214 int error; 215 216 /* XXX Check for in-use before tearing it all down... */ 217 error = config_detach_children(self, flags); 218 if (error) 219 return error; 220 221 if (sc->sc_task_state == I915DRMKMS_TASK_ATTACH) 222 goto out0; 223 if (sc->sc_task_u.workqueue != NULL) { 224 workqueue_destroy(sc->sc_task_u.workqueue); 225 sc->sc_task_u.workqueue = NULL; 226 } 227 228 if (sc->sc_drm_dev == NULL) 229 goto out0; 230 231 i915_driver_remove(sc->sc_drm_dev->dev_private); 232 sc->sc_drm_dev = NULL; 233 out0: linux_pci_dev_destroy(&sc->sc_pci_dev); 234 pmf_device_deregister(self); 235 return 0; 236 } 237 238 static bool 239 i915drmkms_suspend(device_t self, const pmf_qual_t *qual) 240 { 241 struct i915drmkms_softc *const sc = device_private(self); 242 struct drm_device *const dev = sc->sc_drm_dev; 243 int ret; 244 245 if (dev == NULL) 246 return true; 247 248 ret = i915_drm_suspend(dev); 249 if (ret) 250 return false; 251 ret = i915_drm_suspend_late(dev, false); 252 if (ret) 253 return false; 254 255 return true; 256 } 257 258 static bool 259 i915drmkms_resume(device_t self, const pmf_qual_t *qual) 260 { 261 struct i915drmkms_softc *const sc = device_private(self); 262 struct drm_device *const dev = sc->sc_drm_dev; 263 int ret; 264 265 if (dev == NULL) 266 return true; 267 268 ret = i915_drm_resume_early(dev); 269 if (ret) 270 return false; 271 ret = i915_drm_resume(dev); 272 if (ret) 273 return false; 274 275 return true; 276 } 277 278 static void 279 i915drmkms_task_work(struct work *work, void *cookie __unused) 280 { 281 struct i915drmkms_task *const task = container_of(work, 282 struct i915drmkms_task, ift_u.work); 283 284 (*task->ift_fn)(task); 285 } 286 287 int 288 i915drmkms_task_schedule(device_t self, struct i915drmkms_task *task) 289 { 290 struct i915drmkms_softc *const sc = device_private(self); 291 292 switch (sc->sc_task_state) { 293 case I915DRMKMS_TASK_ATTACH: 294 SIMPLEQ_INSERT_TAIL(&sc->sc_task_u.attach, task, ift_u.queue); 295 return 0; 296 case I915DRMKMS_TASK_WORKQUEUE: 297 if (sc->sc_task_u.workqueue == NULL) { 298 aprint_error_dev(self, "unable to schedule task\n"); 299 return EIO; 300 } 301 workqueue_enqueue(sc->sc_task_u.workqueue, &task->ift_u.work, 302 NULL); 303 return 0; 304 default: 305 panic("i915drmkms in invalid task state: %d\n", 306 (int)sc->sc_task_state); 307 } 308 } 309
Indexes created Thu Sep 25 16:09:42 GMT 2025