/* drm_pci.h -- PCI DMA memory management wrappers for DRM -*- linux-c -*- */ /** * \file drm_pci.h * \brief Functions and ioctls to manage PCI memory * * \warning These interfaces aren't stable yet. * * \todo Implement the remaining ioctl's for the PCI pools. * \todo Add support to map these buffers. * \todo The wrappers here are so thin that they would be better off inlined.. * * \author José Fonseca * \author Leif Delgass */ /* * Copyright 2003 José Fonseca. * Copyright 2003 Leif Delgass. * 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 THE * AUTHORS 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. */ #include #include "drmP.h" /**********************************************************************/ /** \name PCI memory */ /*@{*/ /** * \brief Allocate a PCI consistent memory block, for DMA. */ void * DRM(pci_alloc)(drm_device_t *dev, size_t size, size_t align, dma_addr_t maxaddr, dma_addr_t *busaddr) { void *address; #if 0 unsigned long addr; size_t sz; #endif #if DRM_DEBUG_MEMORY int area = DRM_MEM_DMA; spin_lock(&DRM(mem_lock)); if ((DRM(ram_used) >> PAGE_SHIFT) > (DRM_RAM_PERCENT * DRM(ram_available)) / 100) { spin_unlock(&DRM(mem_lock)); return 0; } spin_unlock(&DRM(mem_lock)); #endif /* pci_alloc_consistent only guarantees alignment to the smallest * PAGE_SIZE order which is greater than or equal to the requested size. * Return NULL here for now to make sure nobody tries for larger alignment */ if (align > size) return NULL; if (pci_set_dma_mask( dev->pdev, maxaddr ) != 0) { DRM_ERROR( "Setting pci dma mask failed\n" ); return NULL; } address = pci_alloc_consistent( dev->pdev, size, busaddr ); #if DRM_DEBUG_MEMORY if (address == NULL) { spin_lock(&DRM(mem_lock)); ++DRM(mem_stats)[area].fail_count; spin_unlock(&DRM(mem_lock)); return NULL; } spin_lock(&DRM(mem_lock)); ++DRM(mem_stats)[area].succeed_count; DRM(mem_stats)[area].bytes_allocated += size; DRM(ram_used) += size; spin_unlock(&DRM(mem_lock)); #else if (address == NULL) return NULL; #endif memset(address, 0, size); #if 0 /* XXX - Is virt_to_page() legal for consistent mem? */ /* Reserve */ for (addr = (unsigned long)address, sz = size; sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { SetPageReserved(virt_to_page(addr)); } #endif return address; } /** * \brief Free a PCI consistent memory block. */ void DRM(pci_free)(drm_device_t *dev, size_t size, void *vaddr, dma_addr_t busaddr) { #if 0 unsigned long addr; size_t sz; #endif #if DRM_DEBUG_MEMORY int area = DRM_MEM_DMA; int alloc_count; int free_count; #endif if (!vaddr) { #if DRM_DEBUG_MEMORY DRM_MEM_ERROR(area, "Attempt to free address 0\n"); #endif } else { #if 0 /* XXX - Is virt_to_page() legal for consistent mem? */ /* Unreserve */ for (addr = (unsigned long)vaddr, sz = size; sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { ClearPageReserved(virt_to_page(addr)); } #endif pci_free_consistent( dev->pdev, size, vaddr, busaddr ); } #if DRM_DEBUG_MEMORY spin_lock(&DRM(mem_lock)); free_count = ++DRM(mem_stats)[area].free_count; alloc_count = DRM(mem_stats)[area].succeed_count; DRM(mem_stats)[area].bytes_freed += size; DRM(ram_used) -= size; spin_unlock(&DRM(mem_lock)); if (free_count > alloc_count) { DRM_MEM_ERROR(area, "Excess frees: %d frees, %d allocs\n", free_count, alloc_count); } #endif } /*@}*/ >53 54 55 56 57 58 59 60 61 62 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)
{