nouveau_pci.c revision 1.4
1/* $NetBSD: nouveau_pci.c,v 1.4 2015/10/17 12:02:44 jmcneill 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 1.4 2015/10/17 12:02:44 jmcneill 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 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 67static int nouveau_pci_match(device_t, cfdata_t, void *); 68static void nouveau_pci_attach(device_t, device_t, void *); 69static int nouveau_pci_detach(device_t, int); 70 71static bool nouveau_pci_suspend(device_t, const pmf_qual_t *); 72static bool nouveau_pci_resume(device_t, const pmf_qual_t *); 73 74static void nouveau_pci_task_work(struct work *, void *); 75 76CFATTACH_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. */ 80extern struct drm_driver *const nouveau_drm_driver; 81 82static int 83nouveau_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 97extern char *nouveau_config; 98extern char *nouveau_debug; 99 100static void 101nouveau_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 158static int 159nouveau_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 188out1: nouveau_object_ref(NULL, (void *)&sc->sc_nv_dev); 189out0: pmf_device_deregister(self); 190 return 0; 191} 192 193/* 194 * XXX Synchronize with nouveau_do_suspend in nouveau_drm.c. 195 */ 196static bool 197nouveau_pci_suspend(device_t self, const pmf_qual_t *qual __unused) 198{ 199 struct nouveau_pci_softc *const sc = device_private(self); 200 struct device *const dev = &sc->sc_pci_dev.dev; /* XXX KLUDGE */ 201 202 return nouveau_pmops_suspend(dev) == 0; 203} 204 205static bool 206nouveau_pci_resume(device_t self, const pmf_qual_t *qual) 207{ 208 struct nouveau_pci_softc *const sc = device_private(self); 209 struct device *const dev = &sc->sc_pci_dev.dev; /* XXX KLUDGE */ 210 211 return nouveau_pmops_resume(dev) == 0; 212} 213 214static void 215nouveau_pci_task_work(struct work *work, void *cookie __unused) 216{ 217 struct nouveau_pci_task *const task = container_of(work, 218 struct nouveau_pci_task, nt_u.work); 219 220 (*task->nt_fn)(task); 221} 222 223int 224nouveau_pci_task_schedule(device_t self, struct nouveau_pci_task *task) 225{ 226 struct nouveau_pci_softc *const sc = device_private(self); 227 228 switch (sc->sc_task_state) { 229 case NOUVEAU_TASK_ATTACH: 230 SIMPLEQ_INSERT_TAIL(&sc->sc_task_u.attach, task, nt_u.queue); 231 return 0; 232 case NOUVEAU_TASK_WORKQUEUE: 233 if (sc->sc_task_u.workqueue == NULL) { 234 aprint_error_dev(self, "unable to schedule task\n"); 235 return EIO; 236 } 237 workqueue_enqueue(sc->sc_task_u.workqueue, &task->nt_u.work, 238 NULL); 239 return 0; 240 default: 241 panic("nouveau in invalid task state: %d\n", 242 (int)sc->sc_task_state); 243 } 244} 245 246static int 247nouveau_pci_modcmd(modcmd_t cmd, void *arg __unused) 248{ 249 int error; 250 251 switch (cmd) { 252 case MODULE_CMD_INIT: 253 error = drm_pci_init(nouveau_drm_driver, NULL); 254 if (error) { 255 aprint_error("nouveau_pci: failed to init: %d\n", 256 error); 257 return error; 258 } 259#if 0 /* XXX nouveau acpi */ 260 nouveau_register_dsm_handler(); 261#endif 262 break; 263 case MODULE_CMD_FINI: 264#if 0 /* XXX nouveau acpi */ 265 nouveau_unregister_dsm_handler(); 266#endif 267 drm_pci_exit(nouveau_drm_driver, NULL); 268 break; 269 default: 270 return ENOTTY; 271 } 272 273 return 0; 274} 275