/* * Copyright 2007 Jérôme Glisse * 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 * PRECISION INSIGHT 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: * Jerome Glisse */ #ifndef __AMD_H__ #define __AMD_H__ /* struct amd_cbuffer are for command buffer, this is the structure passed * around during command validation (ie check that user have the right to * execute the given command). */ struct amd_cmd_bo { struct list_head list; uint64_t *offsets; uint32_t *cdw_id; struct drm_buffer_object *bo; unsigned int handle; uint64_t mask; uint64_t flags; uint32_t type; }; struct amd_cmd { uint32_t *cdw; uint32_t cdw_count; struct drm_bo_kmap_obj cdw_kmap; size_t cdw_size; struct amd_cmd_bo *cdw_bo; struct amd_cmd_bo bo_unused; struct amd_cmd_bo bo_used; struct amd_cmd_bo *bo; uint32_t bo_count; void *driver; }; struct amd_cmd_module { uint32_t numof_p0_checkers; uint32_t numof_p3_checkers; int (*check)(struct drm_device *dev, struct amd_cmd *cmd); int (**check_p0)(struct drm_device *dev, struct amd_cmd *cmd, int cdw_id, int reg); int (**check_p3)(struct drm_device *dev, struct amd_cmd *cmd, int cdw_id, int op, int count); }; int amd_cmd_check(struct drm_device *dev, struct amd_cmd *cmd); int amd_ioctl_cmd(struct drm_device *dev, void *data, struct drm_file *file); static inline struct amd_cmd_bo *amd_cmd_get_bo(struct amd_cmd *cmd, int i) { if (i < cmd->bo_count && cmd->bo[i].type == DRM_AMD_CMD_BO_TYPE_DATA) { list_del(&cmd->bo[i].list); list_add_tail(&cmd->bo[i].list, &cmd->bo_used.list); return &cmd->bo[i]; } return NULL; } /* struct amd_fb amd is for storing amd framebuffer informations */ struct amd_fb { struct drm_device *dev; struct drm_crtc *crtc; struct drm_display_mode *fb_mode; struct drm_framebuffer *fb; }; #endif f='#n4'>4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315

/*-
 * 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 <faith@valinux.com>
 *    Gareth Hughes <gareth@valinux.com>
 *
 */

/** @file drm_context.c
 * Implementation of the context management ioctls.
 */

#include "drmP.h"

/* ================================================================
 * Context bitmap support
 */

void drm_ctxbitmap_free(drm_device_t *dev, int ctx_handle)
{
	if (ctx_handle < 0 || ctx_handle >= DRM_MAX_CTXBITMAP || 
	    dev->ctx_bitmap == NULL) {
		DRM_ERROR("Attempt to free invalid context handle: %d\n",
		   ctx_handle);
		return;
	}

	DRM_LOCK();
	clear_bit(ctx_handle, dev->ctx_bitmap);
	dev->context_sareas[ctx_handle] = NULL;
	DRM_UNLOCK();
	return;
}

int drm_ctxbitmap_next(drm_device_t *dev)
{
	int bit;

	if (dev->ctx_bitmap == NULL)
		return -1;

	DRM_LOCK();
	bit = find_first_zero_bit( dev->ctx_bitmap, DRM_MAX_CTXBITMAP );
	if (bit >= DRM_MAX_CTXBITMAP) {
		DRM_UNLOCK();
		return -1;
	}

	set_bit(bit, dev->ctx_bitmap);
	DRM_DEBUG("drm_ctxbitmap_next bit : %d\n", bit);
	if ((bit+1) > dev->max_context) {
		dev->max_context = (bit+1);
		if (dev->context_sareas != NULL) {
			drm_local_map_t **ctx_sareas;

			ctx_sareas = realloc(dev->context_sareas,
			    dev->max_context * sizeof(*dev->context_sareas),
			    M_DRM, M_NOWAIT);
			if (ctx_sareas == NULL) {
				clear_bit(bit, dev->ctx_bitmap);
				DRM_UNLOCK();
				return -1;
			}
			dev->context_sareas = ctx_sareas;
			dev->context_sareas[bit] = NULL;
		} else {
			/* max_context == 1 at this point */
			dev->context_sareas = malloc(dev->max_context * 
			    sizeof(*dev->context_sareas), M_DRM, M_NOWAIT);
			if (dev->context_sareas == NULL) {
				clear_bit(bit, dev->ctx_bitmap);
				DRM_UNLOCK();
				return -1;
			}
			dev->context_sareas[bit] = NULL;
		}
	}
	DRM_UNLOCK();
	return bit;
}

int drm_ctxbitmap_init(drm_device_t *dev)
{
	int i;
   	int temp;

	DRM_LOCK();
	dev->ctx_bitmap = malloc(PAGE_SIZE, M_DRM, M_NOWAIT | M_ZERO);
	if ( dev->ctx_bitmap == NULL ) {
		DRM_UNLOCK();
		return ENOMEM;
	}
	dev->context_sareas = NULL;
	dev->max_context = -1;
	DRM_UNLOCK();

	for ( i = 0 ; i < DRM_RESERVED_CONTEXTS ; i++ ) {
		temp = drm_ctxbitmap_next(dev);
	   	DRM_DEBUG( "drm_ctxbitmap_init : %d\n", temp );
	}

	return 0;
}

void drm_ctxbitmap_cleanup(drm_device_t *dev)
{
	DRM_LOCK();
	if (dev->context_sareas != NULL)
		free(dev->context_sareas, M_DRM);
	free(dev->ctx_bitmap, M_DRM);
	DRM_UNLOCK();
}

/* ================================================================
 * Per Context SAREA Support
 */

int drm_getsareactx( drm_device_t *dev, void *data, struct drm_file *file_priv )
{
	drm_ctx_priv_map_t *request = data;
	drm_local_map_t *map;

	DRM_LOCK();
	if (dev->max_context < 0 ||
	    request->ctx_id >= (unsigned) dev->max_context) {
		DRM_UNLOCK();
		return EINVAL;
	}

	map = dev->context_sareas[request->ctx_id];
	DRM_UNLOCK();

	request->handle = map->handle;

	return 0;
}

int drm_setsareactx(drm_device_t *dev, void *data, struct drm_file *file_priv)
{
	drm_ctx_priv_map_t *request = data;
	drm_local_map_t *map = NULL;

	DRM_LOCK();
	TAILQ_FOREACH(map, &dev->maplist, link) {
		if (map->handle == request->handle) {
			if (dev->max_context < 0)
				goto bad;
			if (request->ctx_id >= (unsigned) dev->max_context)
				goto bad;
			dev->context_sareas[request->ctx_id] = map;
			DRM_UNLOCK();
			return 0;
		}
	}

bad:
	DRM_UNLOCK();
	return EINVAL;
}

/* ================================================================
 * The actual DRM context handling routines
 */

int drm_context_switch(drm_device_t *dev, int old, int new)
{
        if ( test_and_set_bit( 0, &dev->context_flag ) ) {
                DRM_ERROR( "Reentering -- FIXME\n" );
                return EBUSY;
        }

        DRM_DEBUG( "Context switch from %d to %d\n", old, new );

        if ( new == dev->last_context ) {
                clear_bit( 0, &dev->context_flag );
                return 0;
        }

        return 0;
}

int drm_context_switch_complete(drm_device_t *dev, int new)
{
        dev->last_context = new;  /* PRE/POST: This is the _only_ writer. */

        if ( !_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) ) {
                DRM_ERROR( "Lock isn't held after context switch\n" );
        }

				/* If a context switch is ever initiated
                                   when the kernel holds the lock, release
                                   that lock here. */
        clear_bit( 0, &dev->context_flag );

        return 0;
}

int drm_resctx(drm_device_t *dev, void *data, struct drm_file *file_priv)
{
	drm_ctx_res_t *res = data;
	drm_ctx_t ctx;
	int i;

	if ( res->count >= DRM_RESERVED_CONTEXTS ) {
		bzero(&ctx, sizeof(ctx));
		for ( i = 0 ; i < DRM_RESERVED_CONTEXTS ; i++ ) {
			ctx.handle = i;
			if ( DRM_COPY_TO_USER( &res->contexts[i],
					   &ctx, sizeof(ctx) ) )
				return EFAULT;
		}
	}
	res->count = DRM_RESERVED_CONTEXTS;

	return 0;
}

int drm_addctx(drm_device_t *dev, void *data, struct drm_file *file_priv)
{
	drm_ctx_t *ctx = data;

	ctx->handle = drm_ctxbitmap_next(dev);
	if ( ctx->handle == DRM_KERNEL_CONTEXT ) {
				/* Skip kernel's context and get a new one. */
		ctx->handle = drm_ctxbitmap_next(dev);
	}
	DRM_DEBUG( "%d\n", ctx->handle );
	if ( ctx->handle == -1 ) {
		DRM_DEBUG( "Not enough free contexts.\n" );
				/* Should this return -EBUSY instead? */
		return ENOMEM;
	}

	if (dev->driver.context_ctor && ctx->handle != DRM_KERNEL_CONTEXT) {
		DRM_LOCK();
		dev->driver.context_ctor(dev, ctx->handle);
		DRM_UNLOCK();
	}

	return 0;
}

int drm_modctx(drm_device_t *dev, void *data, struct drm_file *file_priv)
{
	/* This does nothing */
	return 0;
}

int drm_getctx(drm_device_t *dev, void *data, struct drm_file *file_priv)
{
	drm_ctx_t *ctx = data;

	/* This is 0, because we don't handle any context flags */
	ctx->flags = 0;

	return 0;
}

int drm_switchctx(drm_device_t *dev, void *data, struct drm_file *file_priv)
{
	drm_ctx_t *ctx = data;

	DRM_DEBUG( "%d\n", ctx->handle );
	return drm_context_switch(dev, dev->last_context, ctx->handle);
}

int drm_newctx(drm_device_t *dev, void *data, struct drm_file *file_priv)
{
	drm_ctx_t *ctx = data;

	DRM_DEBUG( "%d\n", ctx->handle );
	drm_context_switch_complete(dev, ctx->handle);

	return 0;
}

int drm_rmctx(drm_device_t *dev, void *data, struct drm_file *file_priv)
{
	drm_ctx_t *ctx = data;

	DRM_DEBUG( "%d\n", ctx->handle );
	if ( ctx->handle != DRM_KERNEL_CONTEXT ) {
		if (dev->driver.context_dtor) {
			DRM_LOCK();
			dev->driver.context_dtor(dev, ctx->handle);
			DRM_UNLOCK();
		}

		drm_ctxbitmap_free(dev, ctx->handle);
	}

	return 0;
}