/* drm_dma.c -- DMA IOCTL and function support -*- linux-c -*- * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com * * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: * Rickard E. (Rik) Faith * Gareth Hughes * */ #include "drmP.h" #ifndef __HAVE_DMA_WAITQUEUE #define __HAVE_DMA_WAITQUEUE 0 #endif #ifndef __HAVE_DMA_RECLAIM #define __HAVE_DMA_RECLAIM 0 #endif #ifndef __HAVE_SHARED_IRQ #define __HAVE_SHARED_IRQ 0 #endif #if __HAVE_DMA int DRM(dma_setup)( drm_device_t *dev ) { dev->dma = DRM(calloc)(1, sizeof(*dev->dma), DRM_MEM_DRIVER); if (dev->dma == NULL) return DRM_ERR(ENOMEM); DRM_SPININIT(dev->dma_lock, "drmdma"); return 0; } void DRM(dma_takedown)(drm_device_t *dev) { drm_device_dma_t *dma = dev->dma; int i, j; if (dma == NULL) return; /* Clear dma buffers */ for (i = 0; i <= DRM_MAX_ORDER; i++) { #if __HAVE_PCI_DMA if (dma->bufs[i].seg_count) { DRM_DEBUG("order %d: buf_count = %d," " seg_count = %d\n", i, dma->bufs[i].buf_count, dma->bufs[i].seg_count); for (j = 0; j < dma->bufs[i].seg_count; j++) { if (dma->bufs[i].seglist[j] != 0) DRM(pci_free)(dev, dma->bufs[i].buf_size, (void *)dma->bufs[i].seglist[j], dma->bufs[i].seglist_bus[j]); } DRM(free)(dma->bufs[i].seglist, dma->bufs[i].seg_count * sizeof(*dma->bufs[0].seglist), DRM_MEM_SEGS); DRM(free)(dma->bufs[i].seglist_bus, dma->bufs[i].seg_count * sizeof(*dma->bufs[0].seglist_bus), DRM_MEM_SEGS); } #endif /* __HAVE_PCI_DMA */ if (dma->bufs[i].buf_count) { for (j = 0; j < dma->bufs[i].buf_count; j++) { DRM(free)(dma->bufs[i].buflist[j].dev_private, dma->bufs[i].buflist[j].dev_priv_size, DRM_MEM_BUFS); } DRM(free)(dma->bufs[i].buflist, dma->bufs[i].buf_count * sizeof(*dma->bufs[0].buflist), DRM_MEM_BUFS); } } DRM(free)(dma->buflist, dma->buf_count * sizeof(*dma->buflist), DRM_MEM_BUFS); DRM(free)(dma->pagelist, dma->page_count * sizeof(*dma->pagelist), DRM_MEM_PAGES); DRM(free)(dev->dma, sizeof(*dev->dma), DRM_MEM_DRIVER); dev->dma = NULL; DRM_SPINUNINIT(dev->dma_lock); } void DRM(free_buffer)(drm_device_t *dev, drm_buf_t *buf) { if (!buf) return; buf->pending = 0; buf->filp = NULL; buf->used = 0; } #if !__HAVE_DMA_RECLAIM void DRM(reclaim_buffers)(drm_device_t *dev, DRMFILE filp) { drm_device_dma_t *dma = dev->dma; int i; if (!dma) return; for (i = 0; i < dma->buf_count; i++) { if (dma->buflist[i]->filp == filp) { switch (dma->buflist[i]->list) { case DRM_LIST_NONE: DRM(free_buffer)(dev, dma->buflist[i]); break; case DRM_LIST_WAIT: dma->buflist[i]->list = DRM_LIST_RECLAIM; break; default: /* Buffer already on hardware. */ break; } } } } #endif #if !__HAVE_IRQ /* This stub DRM_IOCTL_CONTROL handler is for the drivers that used to require * IRQs for DMA but no longer do. It maintains compatibility with the X Servers * that try to use the control ioctl by simply returning success. */ int DRM(control)( DRM_IOCTL_ARGS ) { drm_control_t ctl; DRM_COPY_FROM_USER_IOCTL( ctl, (drm_control_t *) data, sizeof(ctl) ); switch ( ctl.func ) { case DRM_INST_HANDLER: case DRM_UNINST_HANDLER: return 0; default: return DRM_ERR(EINVAL); } } #endif #endif /* __HAVE_DMA */ id='n63' href='#n63'>63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 
/*
 * Copyright © 2007 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *    Eric Anholt <eric@anholt.net>
 *
 */

/** @file lock.c
 * Tests various potential failures of the DRM locking mechanisms
 */

#include <limits.h>
#include "drmtest.h"

enum auth_event {
	SERVER_READY,
	CLIENT_MAGIC,
	SERVER_LOCKED,
	CLIENT_LOCKED,
};

int commfd[2];
unsigned int lock1 = 0x00001111;
unsigned int lock2 = 0x00002222;

/* return time in milliseconds */
static unsigned int
get_millis()
{
	struct timeval tv;

	gettimeofday(&tv, NULL);
	return tv.tv_sec * 1000 + tv.tv_usec / 1000;
}

static void
wait_event(int pipe, enum auth_event expected_event)
{
	int ret;
	enum auth_event event;
	unsigned char in;

	ret = read(commfd[pipe], &in, 1);
	if (ret == -1)
		err(1, "read error");
	event = in;

	if (event != expected_event)
		errx(1, "unexpected event: %d\n", event);
}

static void
send_event(int pipe, enum auth_event send_event)
{
	int ret;
	unsigned char event;

	event = send_event;
	ret = write(commfd[pipe], &event, 1);
	if (ret == -1)
		err(1, "failed to send event %d", event);
}

static void
client_auth(int drmfd)
{
	struct drm_auth auth;
	int ret;

	/* Get a client magic number and pass it to the master for auth. */
	ret = ioctl(drmfd, DRM_IOCTL_GET_MAGIC, &auth);
	if (ret == -1)
		err(1, "Couldn't get client magic");