| 1 | /* $NetBSD: i915_pci.c,v 1.15 2014/07/24 22:13:23 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.c,v 1.15 2014/07/24 22:13:23 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/drmP.h> |
| 42 | |
| 43 | #include "i915_drv.h" |
| 44 | #include "i915_pci.h" |
| 45 | |
| 46 | SIMPLEQ_HEAD(i915drmkms_task_head, i915drmkms_task); |
| 47 | |
| 48 | struct i915drmkms_softc { |
| 49 | device_t sc_dev; |
| 50 | enum { |
| 51 | I915DRMKMS_TASK_ATTACH, |
| 52 | I915DRMKMS_TASK_WORKQUEUE, |
| 53 | } sc_task_state; |
| 54 | union { |
| 55 | struct workqueue *workqueue; |
| 56 | struct i915drmkms_task_head attach; |
| 57 | } sc_task_u; |
| 58 | struct drm_device *sc_drm_dev; |
| 59 | struct pci_dev sc_pci_dev; |
| 60 | }; |
| 61 | |
| 62 | static const struct intel_device_info * |
| 63 | i915drmkms_pci_lookup(const struct pci_attach_args *); |
| 64 | |
| 65 | static int i915drmkms_match(device_t, cfdata_t, void *); |
| 66 | static void i915drmkms_attach(device_t, device_t, void *); |
| 67 | static int i915drmkms_detach(device_t, int); |
| 68 | |
| 69 | static bool i915drmkms_suspend(device_t, const pmf_qual_t *); |
| 70 | static bool i915drmkms_resume(device_t, const pmf_qual_t *); |
| 71 | |
| 72 | static void i915drmkms_task_work(struct work *, void *); |
| 73 | |
| 74 | CFATTACH_DECL_NEW(i915drmkms, sizeof(struct i915drmkms_softc), |
| 75 | i915drmkms_match, i915drmkms_attach, i915drmkms_detach, NULL); |
| 76 | |
| 77 | /* XXX Kludge to get these from i915_drv.c. */ |
| 78 | extern struct drm_driver *const i915_drm_driver; |
| 79 | extern const struct pci_device_id *const i915_device_ids; |
| 80 | extern const size_t i915_n_device_ids; |
| 81 | |
| 82 | static const struct intel_device_info * |
| 83 | i915drmkms_pci_lookup(const struct pci_attach_args *pa) |
| 84 | { |
| 85 | size_t i; |
| 86 | |
| 87 | /* Attach only at function 0 to work around Intel lossage. */ |
| 88 | if (pa->pa_function != 0) |
| 89 | return NULL; |
| 90 | |
| 91 | /* We're interested only in Intel products. */ |
| 92 | if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL) |
| 93 | return NULL; |
| 94 | |
| 95 | /* We're interested only in Intel display devices. */ |
| 96 | if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY) |
| 97 | return NULL; |
| 98 | |
| 99 | for (i = 0; i < i915_n_device_ids; i++) |
| 100 | if (PCI_PRODUCT(pa->pa_id) == i915_device_ids[i].device) |
| 101 | break; |
| 102 | |
| 103 | /* Did we find it? */ |
| 104 | if (i == i915_n_device_ids) |
| 105 | return NULL; |
| 106 | |
| 107 | const struct intel_device_info *const info = |
| 108 | (const void *)(uintptr_t)i915_device_ids[i].driver_data; |
| 109 | |
| 110 | if (IS_PRELIMINARY_HW(info)) { |
| 111 | printf("i915drmkms: preliminary hardware support disabled\n" ); |
| 112 | return NULL; |
| 113 | } |
| 114 | |
| 115 | return info; |
| 116 | } |
| 117 | |
| 118 | static int |
| 119 | i915drmkms_match(device_t parent, cfdata_t match, void *aux) |
| 120 | { |
| 121 | extern int i915drmkms_guarantee_initialized(void); |
| 122 | const struct pci_attach_args *const pa = aux; |
| 123 | int error; |
| 124 | |
| 125 | error = i915drmkms_guarantee_initialized(); |
| 126 | if (error) { |
| 127 | aprint_error("i915drmkms: failed to initialize: %d\n" , error); |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | if (i915drmkms_pci_lookup(pa) == NULL) |
| 132 | return 0; |
| 133 | |
| 134 | return 6; /* XXX Beat genfb_pci... */ |
| 135 | } |
| 136 | |
| 137 | static void |
| 138 | i915drmkms_attach(device_t parent, device_t self, void *aux) |
| 139 | { |
| 140 | struct i915drmkms_softc *const sc = device_private(self); |
| 141 | const struct pci_attach_args *const pa = aux; |
| 142 | const struct intel_device_info *const info = i915drmkms_pci_lookup(pa); |
| 143 | const unsigned long cookie = |
| 144 | (unsigned long)(uintptr_t)(const void *)info; |
| 145 | int error; |
| 146 | |
| 147 | KASSERT(info != NULL); |
| 148 | |
| 149 | sc->sc_dev = self; |
| 150 | |
| 151 | pci_aprint_devinfo(pa, NULL); |
| 152 | |
| 153 | if (!pmf_device_register(self, &i915drmkms_suspend, |
| 154 | &i915drmkms_resume)) |
| 155 | aprint_error_dev(self, "unable to establish power handler\n" ); |
| 156 | |
| 157 | sc->sc_task_state = I915DRMKMS_TASK_ATTACH; |
| 158 | SIMPLEQ_INIT(&sc->sc_task_u.attach); |
| 159 | |
| 160 | /* XXX errno Linux->NetBSD */ |
| 161 | error = -drm_pci_attach(self, pa, &sc->sc_pci_dev, i915_drm_driver, |
| 162 | cookie, &sc->sc_drm_dev); |
| 163 | if (error) { |
| 164 | aprint_error_dev(self, "unable to attach drm: %d\n" , error); |
| 165 | return; |
| 166 | } |
| 167 | |
| 168 | while (!SIMPLEQ_EMPTY(&sc->sc_task_u.attach)) { |
| 169 | struct i915drmkms_task *const task = |
| 170 | SIMPLEQ_FIRST(&sc->sc_task_u.attach); |
| 171 | |
| 172 | SIMPLEQ_REMOVE_HEAD(&sc->sc_task_u.attach, ift_u.queue); |
| 173 | (*task->ift_fn)(task); |
| 174 | } |
| 175 | |
| 176 | sc->sc_task_state = I915DRMKMS_TASK_WORKQUEUE; |
| 177 | error = workqueue_create(&sc->sc_task_u.workqueue, "intelfb" , |
| 178 | &i915drmkms_task_work, NULL, PRI_NONE, IPL_NONE, WQ_MPSAFE); |
| 179 | if (error) { |
| 180 | aprint_error_dev(self, "unable to create workqueue: %d\n" , |
| 181 | error); |
| 182 | sc->sc_task_u.workqueue = NULL; |
| 183 | return; |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | static int |
| 188 | i915drmkms_detach(device_t self, int flags) |
| 189 | { |
| 190 | struct i915drmkms_softc *const sc = device_private(self); |
| 191 | int error; |
| 192 | |
| 193 | /* XXX Check for in-use before tearing it all down... */ |
| 194 | error = config_detach_children(self, flags); |
| 195 | if (error) |
| 196 | return error; |
| 197 | |
| 198 | if (sc->sc_task_state == I915DRMKMS_TASK_ATTACH) |
| 199 | goto out; |
| 200 | if (sc->sc_task_u.workqueue != NULL) { |
| 201 | workqueue_destroy(sc->sc_task_u.workqueue); |
| 202 | sc->sc_task_u.workqueue = NULL; |
| 203 | } |
| 204 | |
| 205 | if (sc->sc_drm_dev == NULL) |
| 206 | goto out; |
| 207 | /* XXX errno Linux->NetBSD */ |
| 208 | error = -drm_pci_detach(sc->sc_drm_dev, flags); |
| 209 | if (error) |
| 210 | /* XXX Kinda too late to fail now... */ |
| 211 | return error; |
| 212 | sc->sc_drm_dev = NULL; |
| 213 | |
| 214 | out: pmf_device_deregister(self); |
| 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | static bool |
| 219 | i915drmkms_suspend(device_t self, const pmf_qual_t *qual) |
| 220 | { |
| 221 | struct i915drmkms_softc *const sc = device_private(self); |
| 222 | struct drm_device *const dev = sc->sc_drm_dev; |
| 223 | int ret; |
| 224 | |
| 225 | if (dev == NULL) |
| 226 | return true; |
| 227 | |
| 228 | ret = i915_drm_freeze(dev); |
| 229 | if (ret) |
| 230 | return false; |
| 231 | |
| 232 | return true; |
| 233 | } |
| 234 | |
| 235 | static bool |
| 236 | i915drmkms_resume(device_t self, const pmf_qual_t *qual) |
| 237 | { |
| 238 | struct i915drmkms_softc *const sc = device_private(self); |
| 239 | struct drm_device *const dev = sc->sc_drm_dev; |
| 240 | int ret; |
| 241 | |
| 242 | if (dev == NULL) |
| 243 | return true; |
| 244 | |
| 245 | ret = i915_drm_thaw_early(dev); |
| 246 | if (ret) |
| 247 | return false; |
| 248 | ret = i915_drm_thaw(dev); |
| 249 | if (ret) |
| 250 | return false; |
| 251 | |
| 252 | return true; |
| 253 | } |
| 254 | |
| 255 | static void |
| 256 | i915drmkms_task_work(struct work *work, void *cookie __unused) |
| 257 | { |
| 258 | struct i915drmkms_task *const task = container_of(work, |
| 259 | struct i915drmkms_task, ift_u.work); |
| 260 | |
| 261 | (*task->ift_fn)(task); |
| 262 | } |
| 263 | |
| 264 | int |
| 265 | i915drmkms_task_schedule(device_t self, struct i915drmkms_task *task) |
| 266 | { |
| 267 | struct i915drmkms_softc *const sc = device_private(self); |
| 268 | |
| 269 | switch (sc->sc_task_state) { |
| 270 | case I915DRMKMS_TASK_ATTACH: |
| 271 | SIMPLEQ_INSERT_TAIL(&sc->sc_task_u.attach, task, ift_u.queue); |
| 272 | return 0; |
| 273 | case I915DRMKMS_TASK_WORKQUEUE: |
| 274 | if (sc->sc_task_u.workqueue == NULL) { |
| 275 | aprint_error_dev(self, "unable to schedule task\n" ); |
| 276 | return EIO; |
| 277 | } |
| 278 | workqueue_enqueue(sc->sc_task_u.workqueue, &task->ift_u.work, |
| 279 | NULL); |
| 280 | return 0; |
| 281 | default: |
| 282 | panic("i915drmkms in invalid task state: %d\n" , |
| 283 | (int)sc->sc_task_state); |
| 284 | } |
| 285 | } |
| 286 | |