nouveau_pci.c revision 1.6
1/* $NetBSD: nouveau_pci.c,v 1.6 2015/10/27 21:46:42 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 1.6 2015/10/27 21:46:42 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 48MODULE(MODULE_CLASS_DRIVER, nouveau_pci, "nouveau,drmkms_pci"); 49 50SIMPLEQ_HEAD(nouveau_pci_task_head, nouveau_pci_task); 51 52struct nouveau_pci_softc { 53 device_t sc_dev; 54 struct pci_attach_args sc_pa; 55 enum { 56 NOUVEAU_TASK_ATTACH, 57 NOUVEAU_TASK_WORKQUEUE, 58 } sc_task_state; 59 union { 60 struct workqueue *workqueue; 61 struct nouveau_pci_task_head attach; 62 } sc_task_u; 63 struct drm_device *sc_drm_dev; 64 struct pci_dev sc_pci_dev; 65 struct nouveau_device *sc_nv_dev; 66}; 67 68static int nouveau_pci_match(device_t, cfdata_t, void *); 69static void nouveau_pci_attach(device_t, device_t, void *); 70static void nouveau_attach_real(device_t); 71static int nouveau_pci_detach(device_t, int); 72 73static bool nouveau_pci_suspend(device_t, const pmf_qual_t *); 74static bool nouveau_pci_resume(device_t, const pmf_qual_t *); 75 76static void nouveau_pci_task_work(struct work *, void *); 77 78CFATTACH_DECL_NEW(nouveau_pci, sizeof(struct nouveau_pci_softc), 79 nouveau_pci_match, nouveau_pci_attach, nouveau_pci_detach, NULL); 80 81/* Kludge to get this from nouveau_drm.c. */ 82extern struct drm_driver *const nouveau_drm_driver; 83 84static int 85nouveau_pci_match(device_t parent, cfdata_t match, void *aux) 86{ 87 const struct pci_attach_args *const pa = aux; 88 89 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_NVIDIA && 90 PCI_VENDOR(pa->pa_id) != PCI_VENDOR_NVIDIA_SGS) 91 return 0; 92 93 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY) 94 return 0; 95 96 return 6; /* XXX Beat genfb_pci... */ 97} 98 99extern char *nouveau_config; 100extern char *nouveau_debug; 101 102static void 103nouveau_pci_attach(device_t parent, device_t self, void *aux) 104{ 105 struct nouveau_pci_softc *const sc = device_private(self); 106 const struct pci_attach_args *const pa = aux; 107 108 pci_aprint_devinfo(pa, NULL); 109 110 sc->sc_dev = self; 111 sc->sc_pa = *pa; 112 113 if (!pmf_device_register(self, &nouveau_pci_suspend, 114 &nouveau_pci_resume)) 115 aprint_error_dev(self, "unable to establish power handler\n"); 116 117 config_mountroot(self, &nouveau_attach_real); 118} 119 120static void 121nouveau_attach_real(device_t self) 122{ 123 struct nouveau_pci_softc *const sc = device_private(self); 124 const struct pci_attach_args *const pa = &sc->sc_pa; 125 uint64_t devname; 126 int error; 127 128 sc->sc_task_state = NOUVEAU_TASK_ATTACH; 129 SIMPLEQ_INIT(&sc->sc_task_u.attach); 130 131 devname = (uint64_t)device_unit(device_parent(self)) << 32; 132 devname |= pa->pa_bus << 16; 133 /* XXX errno Linux->NetBSD */ 134 error = -nouveau_device_create(&sc->sc_pci_dev, NOUVEAU_BUS_PCI, 135 devname, device_xname(self), nouveau_config, nouveau_debug, 136 &sc->sc_nv_dev); 137 if (error) { 138 aprint_error_dev(self, "unable to create nouveau device: %d\n", 139 error); 140 return; 141 } 142 143 /* XXX errno Linux->NetBSD */ 144 error = -drm_pci_attach(self, pa, &sc->sc_pci_dev, nouveau_drm_driver, 145 0, &sc->sc_drm_dev); 146 if (error) { 147 aprint_error_dev(self, "unable to attach drm: %d\n", error); 148 return; 149 } 150 151 while (!SIMPLEQ_EMPTY(&sc->sc_task_u.attach)) { 152 struct nouveau_pci_task *const task = 153 SIMPLEQ_FIRST(&sc->sc_task_u.attach); 154 155 SIMPLEQ_REMOVE_HEAD(&sc->sc_task_u.attach, nt_u.queue); 156 (*task->nt_fn)(task); 157 } 158 159 sc->sc_task_state = NOUVEAU_TASK_WORKQUEUE; 160 error = workqueue_create(&sc->sc_task_u.workqueue, "nouveau_pci", 161 &nouveau_pci_task_work, NULL, PRI_NONE, IPL_NONE, WQ_MPSAFE); 162 if (error) { 163 aprint_error_dev(self, "unable to create workqueue: %d\n", 164 error); 165 sc->sc_task_u.workqueue = NULL; 166 return; 167 } 168} 169 170static int 171nouveau_pci_detach(device_t self, int flags) 172{ 173 struct nouveau_pci_softc *const sc = device_private(self); 174 int error; 175 176 /* XXX Check for in-use before tearing it all down... */ 177 error = config_detach_children(self, flags); 178 if (error) 179 return error; 180 181 if (sc->sc_task_state == NOUVEAU_TASK_ATTACH) 182 goto out0; 183 if (sc->sc_task_u.workqueue != NULL) { 184 workqueue_destroy(sc->sc_task_u.workqueue); 185 sc->sc_task_u.workqueue = NULL; 186 } 187 188 if (sc->sc_nv_dev == NULL) 189 goto out0; 190 191 if (sc->sc_drm_dev == NULL) 192 goto out1; 193 /* XXX errno Linux->NetBSD */ 194 error = -drm_pci_detach(sc->sc_drm_dev, flags); 195 if (error) 196 /* XXX Kinda too late to fail now... */ 197 return error; 198 sc->sc_drm_dev = NULL; 199 200out1: nouveau_object_ref(NULL, (void *)&sc->sc_nv_dev); 201out0: pmf_device_deregister(self); 202 return 0; 203} 204 205/* 206 * XXX Synchronize with nouveau_do_suspend in nouveau_drm.c. 207 */ 208static bool 209nouveau_pci_suspend(device_t self, const pmf_qual_t *qual __unused) 210{ 211 212 return nouveau_pmops_suspend(self) == 0; 213} 214 215static bool 216nouveau_pci_resume(device_t self, const pmf_qual_t *qual) 217{ 218 219 return nouveau_pmops_resume(self) == 0; 220} 221 222static void 223nouveau_pci_task_work(struct work *work, void *cookie __unused) 224{ 225 struct nouveau_pci_task *const task = container_of(work, 226 struct nouveau_pci_task, nt_u.work); 227 228 (*task->nt_fn)(task); 229} 230 231int 232nouveau_pci_task_schedule(device_t self, struct nouveau_pci_task *task) 233{ 234 struct nouveau_pci_softc *const sc = device_private(self); 235 236 switch (sc->sc_task_state) { 237 case NOUVEAU_TASK_ATTACH: 238 SIMPLEQ_INSERT_TAIL(&sc->sc_task_u.attach, task, nt_u.queue); 239 return 0; 240 case NOUVEAU_TASK_WORKQUEUE: 241 if (sc->sc_task_u.workqueue == NULL) { 242 aprint_error_dev(self, "unable to schedule task\n"); 243 return EIO; 244 } 245 workqueue_enqueue(sc->sc_task_u.workqueue, &task->nt_u.work, 246 NULL); 247 return 0; 248 default: 249 panic("nouveau in invalid task state: %d\n", 250 (int)sc->sc_task_state); 251 } 252} 253 254static int 255nouveau_pci_modcmd(modcmd_t cmd, void *arg __unused) 256{ 257 int error; 258 259 switch (cmd) { 260 case MODULE_CMD_INIT: 261 error = drm_pci_init(nouveau_drm_driver, NULL); 262 if (error) { 263 aprint_error("nouveau_pci: failed to init: %d\n", 264 error); 265 return error; 266 } 267#if 0 /* XXX nouveau acpi */ 268 nouveau_register_dsm_handler(); 269#endif 270 break; 271 case MODULE_CMD_FINI: 272#if 0 /* XXX nouveau acpi */ 273 nouveau_unregister_dsm_handler(); 274#endif 275 drm_pci_exit(nouveau_drm_driver, NULL); 276 break; 277 default: 278 return ENOTTY; 279 } 280 281 return 0; 282} 283