1 /* $NetBSD: vmwgfx_pci.c,v 1.2 2022/07/18 23:34:03 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2022 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: vmwgfx_pci.c,v 1.2 2022/07/18 23:34:03 riastradh Exp $"); 31 32 #ifdef _KERNEL_OPT 33 #include "vga.h" 34 #endif 35 36 #include <sys/types.h> 37 #include <sys/atomic.h> 38 #include <sys/queue.h> 39 #include <sys/systm.h> 40 #include <sys/workqueue.h> 41 42 #include <dev/pci/pciio.h> 43 #include <dev/pci/pcireg.h> 44 #include <dev/pci/pcivar.h> 45 46 #include <dev/pci/wsdisplay_pci.h> 47 #include <dev/wsfb/genfbvar.h> 48 49 #include <drm/drm_device.h> 50 #include <drm/drm_drv.h> 51 #include <drm/drm_fb_helper.h> 52 #include <drm/drm_pci.h> 53 54 #include "vmwgfx_drv.h" 55 #include "vmwgfx_task.h" 56 57 SIMPLEQ_HEAD(vmwgfx_task_head, vmwgfx_task); 58 59 struct vmwgfx_softc { 60 device_t sc_dev; 61 struct pci_attach_args sc_pa; 62 struct lwp *sc_task_thread; 63 struct vmwgfx_task_head sc_tasks; 64 struct workqueue *sc_task_wq; 65 struct drm_device *sc_drm_dev; 66 struct pci_dev sc_pci_dev; 67 bool sc_pci_attached; 68 bool sc_dev_registered; 69 #if defined(__i386__) 70 #define VMWGFX_PCI_UGLY_MAP_HACK 71 /* XXX Used to claim the VGA device before attach_real */ 72 bus_space_handle_t sc_temp_memh; 73 bool sc_temp_set; 74 #endif 75 }; 76 77 static bool vmwgfx_pci_lookup(const struct pci_attach_args *, 78 unsigned long *); 79 80 static int vmwgfx_match(device_t, cfdata_t, void *); 81 static void vmwgfx_attach(device_t, device_t, void *); 82 static void vmwgfx_attach_real(device_t); 83 static int vmwgfx_detach(device_t, int); 84 static bool vmwgfx_do_suspend(device_t, const pmf_qual_t *); 85 static bool vmwgfx_do_resume(device_t, const pmf_qual_t *); 86 87 static void vmwgfx_task_work(struct work *, void *); 88 89 CFATTACH_DECL_NEW(vmwgfx, sizeof(struct vmwgfx_softc), 90 vmwgfx_match, vmwgfx_attach, vmwgfx_detach, NULL); 91 92 /* XXX Kludge to get these from vmwgfx_drv.c. */ 93 extern struct drm_driver *const vmwgfx_drm_driver; 94 extern const struct pci_device_id *const vmwgfx_device_ids; 95 extern const size_t vmwgfx_n_device_ids; 96 97 static bool 98 vmwgfx_pci_lookup(const struct pci_attach_args *pa, unsigned long *flags) 99 { 100 size_t i; 101 102 for (i = 0; i < vmwgfx_n_device_ids; i++) { 103 if ((PCI_VENDOR(pa->pa_id) == vmwgfx_device_ids[i].vendor) && 104 (PCI_PRODUCT(pa->pa_id) == vmwgfx_device_ids[i].device)) 105 break; 106 } 107 108 /* Did we find it? */ 109 if (i == vmwgfx_n_device_ids) 110 return false; 111 112 if (flags) 113 *flags = vmwgfx_device_ids[i].driver_data; 114 return true; 115 } 116 117 static int 118 vmwgfx_match(device_t parent, cfdata_t match, void *aux) 119 { 120 extern int vmwgfx_guarantee_initialized(void); 121 const struct pci_attach_args *const pa = aux; 122 int error; 123 124 error = vmwgfx_guarantee_initialized(); 125 if (error) { 126 aprint_error("vmwgfx: failed to initialize: %d\n", error); 127 return 0; 128 } 129 130 if (!vmwgfx_pci_lookup(pa, NULL)) 131 return 0; 132 133 return 6; /* XXX Beat genfb_pci... */ 134 } 135 136 static void 137 vmwgfx_attach(device_t parent, device_t self, void *aux) 138 { 139 struct vmwgfx_softc *const sc = device_private(self); 140 const struct pci_attach_args *const pa = aux; 141 int error; 142 143 pci_aprint_devinfo(pa, NULL); 144 145 /* Initialize the Linux PCI device descriptor. */ 146 linux_pci_dev_init(&sc->sc_pci_dev, self, device_parent(self), pa, 0); 147 148 sc->sc_dev = self; 149 sc->sc_pa = *pa; 150 sc->sc_task_thread = NULL; 151 SIMPLEQ_INIT(&sc->sc_tasks); 152 error = workqueue_create(&sc->sc_task_wq, "vmwgfxfb", 153 &vmwgfx_task_work, NULL, PRI_NONE, IPL_NONE, WQ_MPSAFE); 154 if (error) { 155 aprint_error_dev(self, "unable to create workqueue: %d\n", 156 error); 157 sc->sc_task_wq = NULL; 158 return; 159 } 160 161 #ifdef VMWGFX_PCI_UGLY_MAP_HACK 162 /* 163 * XXX 164 * We try to map the VGA registers, in case we can prevent vga@isa or 165 * pcdisplay@isa attaching, and stealing wsdisplay0. This only works 166 * with serial console, as actual VGA console has already mapped them. 167 * The only way to handle that is for vga@isa to not attach. 168 */ 169 int rv = bus_space_map(pa->pa_memt, 0xb0000, 0x10000, 0, 170 &sc->sc_temp_memh); 171 sc->sc_temp_set = rv == 0; 172 if (rv != 0) 173 aprint_error_dev(self, "unable to reserve VGA registers for " 174 "i386 vmwgfxdrmkms hack\n"); 175 #endif 176 177 /* 178 * Defer the remainder of initialization until we have mounted 179 * the root file system and can load firmware images. 180 */ 181 config_mountroot(self, &vmwgfx_attach_real); 182 } 183 184 static void 185 vmwgfx_attach_real(device_t self) 186 { 187 struct vmwgfx_softc *const sc = device_private(self); 188 const struct pci_attach_args *const pa = &sc->sc_pa; 189 bool ok __diagused; 190 unsigned long flags = 0 /*XXXGCC*/; 191 int error; 192 193 ok = vmwgfx_pci_lookup(pa, &flags); 194 KASSERT(ok); 195 196 #ifdef VMWGFX_PCI_UGLY_MAP_HACK 197 /* 198 * XXX 199 * Unmap the VGA registers. 200 */ 201 if (sc->sc_temp_set) 202 bus_space_unmap(pa->pa_memt, sc->sc_temp_memh, 0x10000); 203 #endif 204 205 /* 206 * Cause any tasks issued synchronously during attach to be 207 * processed at the end of this function. 208 */ 209 sc->sc_task_thread = curlwp; 210 211 sc->sc_drm_dev = drm_dev_alloc(vmwgfx_drm_driver, self); 212 if (IS_ERR(sc->sc_drm_dev)) { 213 aprint_error_dev(self, "unable to create drm device: %ld\n", 214 PTR_ERR(sc->sc_drm_dev)); 215 sc->sc_drm_dev = NULL; 216 goto out; 217 } 218 219 /* XXX errno Linux->NetBSD */ 220 error = -drm_pci_attach(sc->sc_drm_dev, &sc->sc_pci_dev); 221 if (error) { 222 aprint_error_dev(self, "unable to attach drm: %d\n", error); 223 goto out; 224 } 225 sc->sc_pci_attached = true; 226 227 /* XXX errno Linux->NetBSD */ 228 error = -drm_dev_register(sc->sc_drm_dev, flags); 229 if (error) { 230 aprint_error_dev(self, "unable to register drm: %d\n", error); 231 goto out; 232 } 233 sc->sc_dev_registered = true; 234 235 if (!pmf_device_register(self, &vmwgfx_do_suspend, &vmwgfx_do_resume)) 236 aprint_error_dev(self, "unable to establish power handler\n"); 237 238 /* 239 * Process asynchronous tasks queued synchronously during 240 * attach. This will be for display detection to attach a 241 * framebuffer, so we have the opportunity for a console device 242 * to attach before autoconf has completed, in time for init(8) 243 * to find that console without panicking. 244 */ 245 while (!SIMPLEQ_EMPTY(&sc->sc_tasks)) { 246 struct vmwgfx_task *const task = SIMPLEQ_FIRST(&sc->sc_tasks); 247 248 SIMPLEQ_REMOVE_HEAD(&sc->sc_tasks, vt_u.queue); 249 (*task->vt_fn)(task); 250 } 251 252 out: /* Cause any subesquent tasks to be processed by the workqueue. */ 253 atomic_store_relaxed(&sc->sc_task_thread, NULL); 254 } 255 256 static int 257 vmwgfx_detach(device_t self, int flags) 258 { 259 struct vmwgfx_softc *const sc = device_private(self); 260 int error; 261 262 /* XXX Check for in-use before tearing it all down... */ 263 error = config_detach_children(self, flags); 264 if (error) 265 return error; 266 267 KASSERT(sc->sc_task_thread == NULL); 268 KASSERT(SIMPLEQ_EMPTY(&sc->sc_tasks)); 269 270 pmf_device_deregister(self); 271 if (sc->sc_dev_registered) 272 drm_dev_unregister(sc->sc_drm_dev); 273 if (sc->sc_pci_attached) 274 drm_pci_detach(sc->sc_drm_dev); 275 if (sc->sc_drm_dev) { 276 drm_dev_put(sc->sc_drm_dev); 277 sc->sc_drm_dev = NULL; 278 } 279 if (sc->sc_task_wq) { 280 workqueue_destroy(sc->sc_task_wq); 281 sc->sc_task_wq = NULL; 282 } 283 linux_pci_dev_destroy(&sc->sc_pci_dev); 284 285 return 0; 286 } 287 288 static bool 289 vmwgfx_do_suspend(device_t self, const pmf_qual_t *qual) 290 { 291 struct vmwgfx_softc *const sc = device_private(self); 292 struct drm_device *const dev = sc->sc_drm_dev; 293 int ret; 294 295 ret = vmw_kms_suspend(dev); 296 if (ret) 297 return false; 298 299 return true; 300 } 301 302 static bool 303 vmwgfx_do_resume(device_t self, const pmf_qual_t *qual) 304 { 305 struct vmwgfx_softc *const sc = device_private(self); 306 struct drm_device *const dev = sc->sc_drm_dev; 307 int ret; 308 309 ret = vmw_kms_resume(dev); 310 if (ret) 311 return false; 312 313 return true; 314 } 315 316 static void 317 vmwgfx_task_work(struct work *work, void *cookie __unused) 318 { 319 struct vmwgfx_task *const task = container_of(work, struct vmwgfx_task, 320 vt_u.work); 321 322 (*task->vt_fn)(task); 323 } 324 325 void 326 vmwgfx_task_schedule(device_t self, struct vmwgfx_task *task) 327 { 328 struct vmwgfx_softc *const sc = device_private(self); 329 330 if (atomic_load_relaxed(&sc->sc_task_thread) == curlwp) 331 SIMPLEQ_INSERT_TAIL(&sc->sc_tasks, task, vt_u.queue); 332 else 333 workqueue_enqueue(sc->sc_task_wq, &task->vt_u.work, NULL); 334 } 335
Indexes created Sat Sep 20 22:09:52 GMT 2025