| 1 | /* $NetBSD: nouveau_pci.c,v 1.8 2016/04/19 06:57:37 mrg Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2015 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: nouveau_pci.c,v 1.8 2016/04/19 06:57:37 mrg Exp $" ); |
| 34 | |
| 35 | #include <sys/types.h> |
| 36 | #include <sys/device.h> |
| 37 | #include <sys/queue.h> |
| 38 | #include <sys/workqueue.h> |
| 39 | #include <sys/module.h> |
| 40 | |
| 41 | #include <drm/drmP.h> |
| 42 | |
| 43 | #include <engine/device.h> |
| 44 | |
| 45 | #include "nouveau_drm.h" |
| 46 | #include "nouveau_pci.h" |
| 47 | |
| 48 | MODULE(MODULE_CLASS_DRIVER, nouveau_pci, "nouveau,drmkms_pci" ); |
| 49 | |
| 50 | SIMPLEQ_HEAD(nouveau_pci_task_head, nouveau_pci_task); |
| 51 | |
| 52 | struct nouveau_pci_softc { |
| 53 | device_t sc_dev; |
| 54 | enum { |
| 55 | NOUVEAU_TASK_ATTACH, |
| 56 | NOUVEAU_TASK_WORKQUEUE, |
| 57 | } sc_task_state; |
| 58 | union { |
| 59 | struct workqueue *workqueue; |
| 60 | struct nouveau_pci_task_head attach; |
| 61 | } sc_task_u; |
| 62 | struct drm_device *sc_drm_dev; |
| 63 | struct pci_dev sc_pci_dev; |
| 64 | struct nouveau_device *sc_nv_dev; |
| 65 | }; |
| 66 | |
| 67 | static int nouveau_pci_match(device_t, cfdata_t, void *); |
| 68 | static void nouveau_pci_attach(device_t, device_t, void *); |
| 69 | static int nouveau_pci_detach(device_t, int); |
| 70 | |
| 71 | static bool nouveau_pci_suspend(device_t, const pmf_qual_t *); |
| 72 | static bool nouveau_pci_resume(device_t, const pmf_qual_t *); |
| 73 | |
| 74 | static void nouveau_pci_task_work(struct work *, void *); |
| 75 | |
| 76 | CFATTACH_DECL_NEW(nouveau_pci, sizeof(struct nouveau_pci_softc), |
| 77 | nouveau_pci_match, nouveau_pci_attach, nouveau_pci_detach, NULL); |
| 78 | |
| 79 | /* Kludge to get this from nouveau_drm.c. */ |
| 80 | extern struct drm_driver *const nouveau_drm_driver; |
| 81 | |
| 82 | static int |
| 83 | nouveau_pci_match(device_t parent, cfdata_t match, void *aux) |
| 84 | { |
| 85 | const struct pci_attach_args *const pa = aux; |
| 86 | |
| 87 | if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_NVIDIA && |
| 88 | PCI_VENDOR(pa->pa_id) != PCI_VENDOR_NVIDIA_SGS) |
| 89 | return 0; |
| 90 | |
| 91 | if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY) |
| 92 | return 0; |
| 93 | |
| 94 | return 6; /* XXX Beat genfb_pci... */ |
| 95 | } |
| 96 | |
| 97 | extern char *nouveau_config; |
| 98 | extern char *nouveau_debug; |
| 99 | |
| 100 | static void |
| 101 | nouveau_pci_attach(device_t parent, device_t self, void *aux) |
| 102 | { |
| 103 | struct nouveau_pci_softc *const sc = device_private(self); |
| 104 | const struct pci_attach_args *const pa = aux; |
| 105 | uint64_t devname; |
| 106 | int error; |
| 107 | |
| 108 | pci_aprint_devinfo(pa, NULL); |
| 109 | |
| 110 | sc->sc_dev = self; |
| 111 | |
| 112 | if (!pmf_device_register(self, &nouveau_pci_suspend, |
| 113 | &nouveau_pci_resume)) |
| 114 | aprint_error_dev(self, "unable to establish power handler\n" ); |
| 115 | |
| 116 | sc->sc_task_state = NOUVEAU_TASK_ATTACH; |
| 117 | SIMPLEQ_INIT(&sc->sc_task_u.attach); |
| 118 | |
| 119 | devname = (uint64_t)device_unit(device_parent(self)) << 32; |
| 120 | devname |= pa->pa_bus << 16; |
| 121 | /* XXX errno Linux->NetBSD */ |
| 122 | error = -nouveau_device_create(&sc->sc_pci_dev, NOUVEAU_BUS_PCI, |
| 123 | devname, device_xname(self), nouveau_config, nouveau_debug, |
| 124 | &sc->sc_nv_dev); |
| 125 | if (error) { |
| 126 | aprint_error_dev(self, "unable to create nouveau device: %d\n" , |
| 127 | error); |
| 128 | return; |
| 129 | } |
| 130 | |
| 131 | /* XXX errno Linux->NetBSD */ |
| 132 | error = -drm_pci_attach(self, pa, &sc->sc_pci_dev, nouveau_drm_driver, |
| 133 | 0, &sc->sc_drm_dev); |
| 134 | if (error) { |
| 135 | aprint_error_dev(self, "unable to attach drm: %d\n" , error); |
| 136 | return; |
| 137 | } |
| 138 | |
| 139 | while (!SIMPLEQ_EMPTY(&sc->sc_task_u.attach)) { |
| 140 | struct nouveau_pci_task *const task = |
| 141 | SIMPLEQ_FIRST(&sc->sc_task_u.attach); |
| 142 | |
| 143 | SIMPLEQ_REMOVE_HEAD(&sc->sc_task_u.attach, nt_u.queue); |
| 144 | (*task->nt_fn)(task); |
| 145 | } |
| 146 | |
| 147 | sc->sc_task_state = NOUVEAU_TASK_WORKQUEUE; |
| 148 | error = workqueue_create(&sc->sc_task_u.workqueue, "nouveau_pci" , |
| 149 | &nouveau_pci_task_work, NULL, PRI_NONE, IPL_NONE, WQ_MPSAFE); |
| 150 | if (error) { |
| 151 | aprint_error_dev(self, "unable to create workqueue: %d\n" , |
| 152 | error); |
| 153 | sc->sc_task_u.workqueue = NULL; |
| 154 | return; |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | static int |
| 159 | nouveau_pci_detach(device_t self, int flags) |
| 160 | { |
| 161 | struct nouveau_pci_softc *const sc = device_private(self); |
| 162 | int error; |
| 163 | |
| 164 | /* XXX Check for in-use before tearing it all down... */ |
| 165 | error = config_detach_children(self, flags); |
| 166 | if (error) |
| 167 | return error; |
| 168 | |
| 169 | if (sc->sc_task_state == NOUVEAU_TASK_ATTACH) |
| 170 | goto out0; |
| 171 | if (sc->sc_task_u.workqueue != NULL) { |
| 172 | workqueue_destroy(sc->sc_task_u.workqueue); |
| 173 | sc->sc_task_u.workqueue = NULL; |
| 174 | } |
| 175 | |
| 176 | if (sc->sc_nv_dev == NULL) |
| 177 | goto out0; |
| 178 | |
| 179 | if (sc->sc_drm_dev == NULL) |
| 180 | goto out1; |
| 181 | /* XXX errno Linux->NetBSD */ |
| 182 | error = -drm_pci_detach(sc->sc_drm_dev, flags); |
| 183 | if (error) |
| 184 | /* XXX Kinda too late to fail now... */ |
| 185 | return error; |
| 186 | sc->sc_drm_dev = NULL; |
| 187 | |
| 188 | out1: nouveau_object_ref(NULL, (void *)&sc->sc_nv_dev); |
| 189 | out0: pmf_device_deregister(self); |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * XXX Synchronize with nouveau_do_suspend in nouveau_drm.c. |
| 195 | */ |
| 196 | static bool |
| 197 | nouveau_pci_suspend(device_t self, const pmf_qual_t *qual __unused) |
| 198 | { |
| 199 | struct nouveau_pci_softc *const sc = device_private(self); |
| 200 | |
| 201 | return nouveau_pmops_suspend(sc->sc_drm_dev) == 0; |
| 202 | } |
| 203 | |
| 204 | static bool |
| 205 | nouveau_pci_resume(device_t self, const pmf_qual_t *qual) |
| 206 | { |
| 207 | struct nouveau_pci_softc *const sc = device_private(self); |
| 208 | |
| 209 | return nouveau_pmops_resume(sc->sc_drm_dev) == 0; |
| 210 | } |
| 211 | |
| 212 | static void |
| 213 | nouveau_pci_task_work(struct work *work, void *cookie __unused) |
| 214 | { |
| 215 | struct nouveau_pci_task *const task = container_of(work, |
| 216 | struct nouveau_pci_task, nt_u.work); |
| 217 | |
| 218 | (*task->nt_fn)(task); |
| 219 | } |
| 220 | |
| 221 | int |
| 222 | nouveau_pci_task_schedule(device_t self, struct nouveau_pci_task *task) |
| 223 | { |
| 224 | struct nouveau_pci_softc *const sc = device_private(self); |
| 225 | |
| 226 | switch (sc->sc_task_state) { |
| 227 | case NOUVEAU_TASK_ATTACH: |
| 228 | SIMPLEQ_INSERT_TAIL(&sc->sc_task_u.attach, task, nt_u.queue); |
| 229 | return 0; |
| 230 | case NOUVEAU_TASK_WORKQUEUE: |
| 231 | if (sc->sc_task_u.workqueue == NULL) { |
| 232 | aprint_error_dev(self, "unable to schedule task\n" ); |
| 233 | return EIO; |
| 234 | } |
| 235 | workqueue_enqueue(sc->sc_task_u.workqueue, &task->nt_u.work, |
| 236 | NULL); |
| 237 | return 0; |
| 238 | default: |
| 239 | panic("nouveau in invalid task state: %d\n" , |
| 240 | (int)sc->sc_task_state); |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | static int |
| 245 | nouveau_pci_modcmd(modcmd_t cmd, void *arg __unused) |
| 246 | { |
| 247 | int error; |
| 248 | |
| 249 | switch (cmd) { |
| 250 | case MODULE_CMD_INIT: |
| 251 | error = drm_pci_init(nouveau_drm_driver, NULL); |
| 252 | if (error) { |
| 253 | aprint_error("nouveau_pci: failed to init: %d\n" , |
| 254 | error); |
| 255 | return error; |
| 256 | } |
| 257 | #if 0 /* XXX nouveau acpi */ |
| 258 | nouveau_register_dsm_handler(); |
| 259 | #endif |
| 260 | break; |
| 261 | case MODULE_CMD_FINI: |
| 262 | #if 0 /* XXX nouveau acpi */ |
| 263 | nouveau_unregister_dsm_handler(); |
| 264 | #endif |
| 265 | drm_pci_exit(nouveau_drm_driver, NULL); |
| 266 | break; |
| 267 | default: |
| 268 | return ENOTTY; |
| 269 | } |
| 270 | |
| 271 | return 0; |
| 272 | } |
| 273 | |