/* * Copyright 2007 Stephane Marchesin * 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. */ #include "drmP.h" #include "drm.h" #include "nouveau_drm.h" #include "nouveau_drv.h" static uint32_t nv04_graph_ctx_regs [] = { NV04_PGRAPH_CTX_SWITCH1, NV04_PGRAPH_CTX_SWITCH2, NV04_PGRAPH_CTX_SWITCH3, NV04_PGRAPH_CTX_SWITCH4, NV04_PGRAPH_CTX_CACHE1, NV04_PGRAPH_CTX_CACHE2, NV04_PGRAPH_CTX_CACHE3, NV04_PGRAPH_CTX_CACHE4, 0x00400184, 0x004001a4, 0x004001c4, 0x004001e4, 0x00400188, 0x004001a8, 0x004001c8, 0x004001e8, 0x0040018c, 0x004001ac, 0x004001cc, 0x004001ec, 0x00400190, 0x004001b0, 0x004001d0, 0x004001f0, 0x00400194, 0x004001b4, 0x004001d4, 0x004001f4, 0x00400198, 0x004001b8, 0x004001d8, 0x004001f8, 0x0040019c, 0x004001bc, 0x004001dc, 0x004001fc, 0x00400174, NV04_PGRAPH_DMA_START_0, NV04_PGRAPH_DMA_START_1, NV04_PGRAPH_DMA_LENGTH, NV04_PGRAPH_DMA_MISC, NV04_PGRAPH_DMA_PITCH, NV04_PGRAPH_BOFFSET0, NV04_PGRAPH_BBASE0, NV04_PGRAPH_BLIMIT0, NV04_PGRAPH_BOFFSET1, NV04_PGRAPH_BBASE1, NV04_PGRAPH_BLIMIT1, NV04_PGRAPH_BOFFSET2, NV04_PGRAPH_BBASE2, NV04_PGRAPH_BLIMIT2, NV04_PGRAPH_BOFFSET3, NV04_PGRAPH_BBASE3, NV04_PGRAPH_BLIMIT3, NV04_PGRAPH_BOFFSET4, NV04_PGRAPH_BBASE4, NV04_PGRAPH_BLIMIT4, NV04_PGRAPH_BOFFSET5, NV04_PGRAPH_BBASE5, NV04_PGRAPH_BLIMIT5, NV04_PGRAPH_BPITCH0, NV04_PGRAPH_BPITCH1, NV04_PGRAPH_BPITCH2, NV04_PGRAPH_BPITCH3, NV04_PGRAPH_BPITCH4, NV04_PGRAPH_SURFACE, NV04_PGRAPH_STATE, NV04_PGRAPH_BSWIZZLE2, NV04_PGRAPH_BSWIZZLE5, NV04_PGRAPH_BPIXEL, NV04_PGRAPH_NOTIFY, NV04_PGRAPH_PATT_COLOR0, NV04_PGRAPH_PATT_COLOR1, NV04_PGRAPH_PATT_COLORRAM+0x00, NV04_PGRAPH_PATT_COLORRAM+0x01, NV04_PGRAPH_PATT_COLORRAM+0x02, NV04_PGRAPH_PATT_COLORRAM+0x03, NV04_PGRAPH_PATT_COLORRAM+0x04, NV04_PGRAPH_PATT_COLORRAM+0x05, NV04_PGRAPH_PATT_COLORRAM+0x06, NV04_PGRAPH_PATT_COLORRAM+0x07, NV04_PGRAPH_PATT_COLORRAM+0x08, NV04_PGRAPH_PATT_COLORRAM+0x09, NV04_PGRAPH_PATT_COLORRAM+0x0A, NV04_PGRAPH_PATT_COLORRAM+0x0B, NV04_PGRAPH_PATT_COLORRAM+0x0C, NV04_PGRAPH_PATT_COLORRAM+0x0D, NV04_PGRAPH_PATT_COLORRAM+0x0E, NV04_PGRAPH_PATT_COLORRAM+0x0F, NV04_PGRAPH_PATT_COLORRAM+0x10, NV04_PGRAPH_PATT_COLORRAM+0x11, NV04_PGRAPH_PATT_COLORRAM+0x12, NV04_PGRAPH_PATT_COLORRAM+0x13, NV04_PGRAPH_PATT_COLORRAM+0x14, NV04_PGRAPH_PATT_COLORRAM+0x15, NV04_PGRAPH_PATT_COLORRAM+0x16, NV04_PGRAPH_PATT_COLORRAM+0x17, NV04_PGRAPH_PATT_COLORRAM+0x18, NV04_PGRAPH_PATT_COLORRAM+0x19, NV04_PGRAPH_PATT_COLORRAM+0x1A, NV04_PGRAPH_PATT_COLORRAM+0x1B, NV04_PGRAPH_PATT_COLORRAM+0x1C, NV04_PGRAPH_PATT_COLORRAM+0x1D, NV04_PGRAPH_PATT_COLORRAM+0x1E, NV04_PGRAPH_PATT_COLORRAM+0x1F, NV04_PGRAPH_PATT_COLORRAM+0x20, NV04_PGRAPH_PATT_COLORRAM+0x21, NV04_PGRAPH_PATT_COLORRAM+0x22, NV04_PGRAPH_PATT_COLORRAM+0x23, NV04_PGRAPH_PATT_COLORRAM+0x24, NV04_PGRAPH_PATT_COLORRAM+0x25, NV04_PGRAPH_PATT_COLORRAM+0x26, NV04_PGRAPH_PATT_COLORRAM+0x27, NV04_PGRAPH_PATT_COLORRAM+0x28, NV04_PGRAPH_PATT_COLORRAM+0x29, NV04_PGRAPH_PATT_COLORRAM+0x2A, NV04_PGRAPH_PATT_COLORRAM+0x2B, NV04_PGRAPH_PATT_COLORRAM+0x2C, NV04_PGRAPH_PATT_COLORRAM+0x2D, NV04_PGRAPH_PATT_COLORRAM+0x2E, NV04_PGRAPH_PATT_COLORRAM+0x2F, NV04_PGRAPH_PATT_COLORRAM+0x30, NV04_PGRAPH_PATT_COLORRAM+0x31, NV04_PGRAPH_PATT_COLORRAM+0x32, NV04_PGRAPH_PATT_COLORRAM+0x33, NV04_PGRAPH_PATT_COLORRAM+0x34, NV04_PGRAPH_PATT_COLORRAM+0x35, NV04_PGRAPH_PATT_COLORRAM+0x36, NV04_PGRAPH_PATT_COLORRAM+0x37, NV04_PGRAPH_PATT_COLORRAM+0x38, NV04_PGRAPH_PATT_COLORRAM+0x39, NV04_PGRAPH_PATT_COLORRAM+0x3A, NV04_PGRAPH_PATT_COLORRAM+0x3B, NV04_PGRAPH_PATT_COLORRAM+0x3C, NV04_PGRAPH_PATT_COLORRAM+0x3D, NV04_PGRAPH_PATT_COLORRAM+0x3E, NV04_PGRAPH_PATT_COLORRAM+0x3F, NV04_PGRAPH_PATTERN, 0x0040080c, NV04_PGRAPH_PATTERN_SHAPE, 0x00400600, NV04_PGRAPH_ROP3, NV04_PGRAPH_CHROMA, NV04_PGRAPH_BETA_AND, NV04_PGRAPH_BETA_PREMULT, NV04_PGRAPH_CONTROL0, NV04_PGRAPH_CONTROL1, NV04_PGRAPH_CONTROL2, NV04_PGRAPH_BLEND, NV04_PGRAPH_STORED_FMT, NV04_PGRAPH_SOURCE_COLOR, 0x00400560, 0x00400568, 0x00400564, 0x0040056c, 0x00400400, 0x00400480, 0x00400404, 0x00400484, 0x00400408, 0x00400488, 0x0040040c, 0x0040048c, 0x00400410, 0x00400490, 0x00400414, 0x00400494, 0x00400418, 0x00400498, 0x0040041c, 0x0040049c, 0x00400420, 0x004004a0, 0x00400424, 0x004004a4, 0x00400428, 0x004004a8, 0x0040042c, 0x004004ac, 0x00400430, 0x004004b0, 0x00400434, 0x004004b4, 0x00400438, 0x004004b8, 0x0040043c, 0x004004bc, 0x00400440, 0x004004c0, 0x00400444, 0x004004c4, 0x00400448, 0x004004c8, 0x0040044c, 0x004004cc, 0x00400450, 0x004004d0, 0x00400454, 0x004004d4, 0x00400458, 0x004004d8, 0x0040045c, 0x004004dc, 0x00400460, 0x004004e0, 0x00400464, 0x004004e4, 0x00400468, 0x004004e8, 0x0040046c, 0x004004ec, 0x00400470, 0x004004f0, 0x00400474, 0x004004f4, 0x00400478, 0x004004f8, 0x0040047c, 0x004004fc, 0x0040053c, 0x00400544, 0x00400540, 0x00400548, 0x00400560, 0x00400568, 0x00400564, 0x0040056c, 0x00400534, 0x00400538, 0x00400514, 0x00400518, 0x0040051c, 0x00400520, 0x00400524, 0x00400528, 0x0040052c, 0x00400530, 0x00400d00, 0x00400d40, 0x00400d80, 0x00400d04, 0x00400d44, 0x00400d84, 0x00400d08, 0x00400d48, 0x00400d88, 0x00400d0c, 0x00400d4c, 0x00400d8c, 0x00400d10, 0x00400d50, 0x00400d90, 0x00400d14, 0x00400d54, 0x00400d94, 0x00400d18, 0x00400d58, 0x00400d98, 0x00400d1c, 0x00400d5c, 0x00400d9c, 0x00400d20, 0x00400d60, 0x00400da0, 0x00400d24, 0x00400d64, 0x00400da4, 0x00400d28, 0x00400d68, 0x00400da8, 0x00400d2c, 0x00400d6c, 0x00400dac, 0x00400d30, 0x00400d70, 0x00400db0, 0x00400d34, 0x00400d74, 0x00400db4, 0x00400d38, 0x00400d78, 0x00400db8, 0x00400d3c, 0x00400d7c, 0x00400dbc, 0x00400590, 0x00400594, 0x00400598, 0x0040059c, 0x004005a8, 0x004005ac, 0x004005b0, 0x004005b4, 0x004005c0, 0x004005c4, 0x004005c8, 0x004005cc, 0x004005d0, 0x004005d4, 0x004005d8, 0x004005dc, 0x004005e0, NV04_PGRAPH_PASSTHRU_0, NV04_PGRAPH_PASSTHRU_1, NV04_PGRAPH_PASSTHRU_2, NV04_PGRAPH_DVD_COLORFMT, NV04_PGRAPH_SCALED_FORMAT, NV04_PGRAPH_MISC24_0, NV04_PGRAPH_MISC24_1, NV04_PGRAPH_MISC24_2, 0x00400500, 0x00400504, NV04_PGRAPH_VALID1, NV04_PGRAPH_VALID2 }; struct graph_state { int nv04[sizeof(nv04_graph_ctx_regs)/sizeof(nv04_graph_ctx_regs[0])]; }; void nouveau_nv04_context_switch(struct drm_device *dev) { struct drm_nouveau_private *dev_priv = dev->dev_private; struct nouveau_engine *engine = &dev_priv->Engine; struct nouveau_channel *next, *last; int chid; if (!dev) { DRM_DEBUG("Invalid drm_device\n"); return; } dev_priv = dev->dev_private; if (!dev_priv) { DRM_DEBUG("Invalid drm_nouveau_private\n"); return; } if (!dev_priv->fifos) { DRM_DEBUG("Invalid drm_nouveau_private->fifos\n"); return; } chid = engine->fifo.channel_id(dev); next = dev_priv->fifos[chid]; if (!next) { DRM_DEBUG("Invalid next channel\n"); return; } chid = (NV_READ(NV04_PGRAPH_CTX_USER) >> 24) & (engine->fifo.channels - 1); last = dev_priv->fifos[chid]; if (!last) { DRM_DEBUG("WARNING: Invalid last channel, switch to %x\n", next->id); } else { DRM_INFO("NV: PGRAPH context switch interrupt channel %x -> %x\n", last->id, next->id); } /* NV_WRITE(NV03_PFIFO_CACHES, 0x0); NV_WRITE(NV04_PFIFO_CACHE0_PULL0, 0x0); NV_WRITE(NV04_PFIFO_CACHE1_PULL0, 0x0);*/ NV_WRITE(NV04_PGRAPH_FIFO,0x0); if (last) nv04_graph_save_context(last); nouveau_wait_for_idle(dev); NV_WRITE(NV04_PGRAPH_CTX_CONTROL, 0x10000000); NV_WRITE(NV04_PGRAPH_CTX_USER, (NV_READ(NV04_PGRAPH_CTX_USER) & 0xffffff) | (0x0f << 24)); nouveau_wait_for_idle(dev); nv04_graph_load_context(next); NV_WRITE(NV04_PGRAPH_CTX_CONTROL, 0x10010100); NV_WRITE(NV04_PGRAPH_CTX_USER, next->id << 24); NV_WRITE(NV04_PGRAPH_FFINTFC_ST2, NV_READ(NV04_PGRAPH_FFINTFC_ST2)&0x000FFFFF); /* NV_WRITE(NV04_PGRAPH_FIFO,0x0); NV_WRITE(NV04_PFIFO_CACHE0_PULL0, 0x0); NV_WRITE(NV04_PFIFO_CACHE1_PULL0, 0x1); NV_WRITE(NV03_PFIFO_CACHES, 0x1);*/ NV_WRITE(NV04_PGRAPH_FIFO,0x1); } int nv04_graph_create_context(struct nouveau_channel *chan) { struct graph_state* pgraph_ctx; DRM_DEBUG("nv04_graph_context_create %d\n", chan->id); chan->pgraph_ctx = pgraph_ctx = drm_calloc(1, sizeof(*pgraph_ctx), DRM_MEM_DRIVER); if (pgraph_ctx == NULL) return -ENOMEM; //dev_priv->fifos[channel].pgraph_ctx_user = channel << 24; pgraph_ctx->nv04[0] = 0x0001ffff; /* is it really needed ??? */ //dev_priv->fifos[channel].pgraph_ctx[1] = NV_READ(NV_PGRAPH_DEBUG_4); //dev_priv->fifos[channel].pgraph_ctx[2] = NV_READ(0x004006b0); return 0; } void nv04_graph_destroy_context(struct nouveau_channel *chan) { struct graph_state* pgraph_ctx = chan->pgraph_ctx; drm_free(pgraph_ctx, sizeof(*pgraph_ctx), DRM_MEM_DRIVER); chan->pgraph_ctx = NULL; } int nv04_graph_load_context(struct nouveau_channel *chan) { struct drm_device *dev = chan->dev; struct drm_nouveau_private *dev_priv = dev->dev_private; struct graph_state* pgraph_ctx = chan->pgraph_ctx; int i; for (i = 0; i < sizeof(nv04_graph_ctx_regs)/sizeof(nv04_graph_ctx_regs[0]); i++) NV_WRITE(nv04_graph_ctx_regs[i], pgraph_ctx->nv04[i]); return 0; } int nv04_graph_save_context(struct nouveau_channel *chan) { struct drm_device *dev = chan->dev; struct drm_nouveau_private *dev_priv = dev->dev_private; struct graph_state* pgraph_ctx = chan->pgraph_ctx; int i; for (i = 0; i < sizeof(nv04_graph_ctx_regs)/sizeof(nv04_graph_ctx_regs[0]); i++) pgraph_ctx->nv04[i] = NV_READ(nv04_graph_ctx_regs[i]); return 0; } int nv04_graph_init(struct drm_device *dev) { struct drm_nouveau_private *dev_priv = dev->dev_private; NV_WRITE(NV03_PMC_ENABLE, NV_READ(NV03_PMC_ENABLE) & ~NV_PMC_ENABLE_PGRAPH); NV_WRITE(NV03_PMC_ENABLE, NV_READ(NV03_PMC_ENABLE) | NV_PMC_ENABLE_PGRAPH); /* Enable PGRAPH interrupts */ NV_WRITE(NV03_PGRAPH_INTR, 0xFFFFFFFF); NV_WRITE(NV03_PGRAPH_INTR_EN, 0xFFFFFFFF); NV_WRITE(NV04_PGRAPH_VALID1, 0); NV_WRITE(NV04_PGRAPH_VALID2, 0); /*NV_WRITE(NV04_PGRAPH_DEBUG_0, 0x000001FF); NV_WRITE(NV04_PGRAPH_DEBUG_0, 0x001FFFFF);*/ NV_WRITE(NV04_PGRAPH_DEBUG_0, 0x1231c000); /*1231C000 blob, 001 haiku*/ //*V_WRITE(NV04_PGRAPH_DEBUG_1, 0xf2d91100);*/ NV_WRITE(NV04_PGRAPH_DEBUG_1, 0x72111100); /*0x72111100 blob , 01 haiku*/ /*NV_WRITE(NV04_PGRAPH_DEBUG_2, 0x11d5f870);*/ NV_WRITE(NV04_PGRAPH_DEBUG_2, 0x11d5f071); /*haiku same*/ /*NV_WRITE(NV04_PGRAPH_DEBUG_3, 0xfad4ff31);*/ NV_WRITE(NV04_PGRAPH_DEBUG_3, 0xf0d4ff31); /*haiku and blob 10d4*/ NV_WRITE(NV04_PGRAPH_STATE , 0xFFFFFFFF); NV_WRITE(NV04_PGRAPH_CTX_CONTROL , 0x10010100); NV_WRITE(NV04_PGRAPH_FIFO , 0x00000001); /* These don't belong here, they're part of a per-channel context */ NV_WRITE(NV04_PGRAPH_PATTERN_SHAPE, 0x00000000); NV_WRITE(NV04_PGRAPH_BETA_AND , 0xFFFFFFFF); return 0; } void nv04_graph_takedown(struct drm_device *dev) { } id='n278' href='#n278'>278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 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/**
 * \file drm_proc.h 
 * /proc support for DRM
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 *
 * \par Acknowledgements:
 *    Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix
 *    the problem with the proc files not outputting all their information.
 */

/*
 * Created: Mon Jan 11 09:48:47 1999 by faith@valinux.com
 *
 * Copyright 1999 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.
 */

#include "drmP.h"

static int	   DRM(name_info)(char *buf, char **start, off_t offset,
				  int request, int *eof, void *data);
static int	   DRM(vm_info)(char *buf, char **start, off_t offset,
				int request, int *eof, void *data);
static int	   DRM(clients_info)(char *buf, char **start, off_t offset,
				     int request, int *eof, void *data);
static int	   DRM(queues_info)(char *buf, char **start, off_t offset,
				    int request, int *eof, void *data);
static int	   DRM(bufs_info)(char *buf, char **start, off_t offset,
				  int request, int *eof, void *data);
#if DRM_DEBUG_CODE
static int	   DRM(vma_info)(char *buf, char **start, off_t offset,
				 int request, int *eof, void *data);
#endif

/**
 * Proc file list.
 */
struct drm_proc_list {
	const char *name;	/**< file name */
	int	   (*f)(char *, char **, off_t, int, int *, void *);	/**< proc callback*/
} DRM(proc_list)[] = {
	{ "name",    DRM(name_info)    },
	{ "mem",     DRM(mem_info)     },
	{ "vm",	     DRM(vm_info)      },
	{ "clients", DRM(clients_info) },
	{ "queues",  DRM(queues_info)  },
	{ "bufs",    DRM(bufs_info)    },
#if DRM_DEBUG_CODE
	{ "vma",     DRM(vma_info)     },
#endif
};
#define DRM_PROC_ENTRIES (sizeof(DRM(proc_list))/sizeof(DRM(proc_list)[0]))

/**
 * Initialize the DRI proc filesystem for a device.
 *
 * \param dev DRM device.
 * \param minor device minor number.
 * \param root DRI proc dir entry.
 * \param dev_root resulting DRI device proc dir entry.
 * \return root entry pointer on success, or NULL on failure.
 * 
 * Create the DRI proc root entry "/proc/dri", the device proc root entry
 * "/proc/dri/%minor%/", and each entry in proc_list as
 * "/proc/dri/%minor%/%name%".
 */
int DRM(proc_init)(drm_device_t *dev, int minor,
				      struct proc_dir_entry *root,
				      struct proc_dir_entry **dev_root)
{
	struct proc_dir_entry *ent;
	int		      i, j;
	char                  name[64];

	sprintf(name, "%d", minor);
	*dev_root = create_proc_entry(name, S_IFDIR, root);
	if (!*dev_root) {
		DRM_ERROR("Cannot create /proc/dri/%s\n", name);
		return -1;
	}

	for (i = 0; i < DRM_PROC_ENTRIES; i++) {
		ent = create_proc_entry(DRM(proc_list)[i].name,
					S_IFREG|S_IRUGO, *dev_root);
		if (!ent) {
			DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
				  name, DRM(proc_list)[i].name);
			for (j = 0; j < i; j++)
				remove_proc_entry(DRM(proc_list)[i].name,
						  *dev_root);
			remove_proc_entry(name, root);
			return -1;
		}
		ent->read_proc = DRM(proc_list)[i].f;
		ent->data      = dev;
	}
	return 0;
}


/**
 * Cleanup the proc filesystem resources.
 *
 * \param minor device minor number.
 * \param root DRI proc dir entry.
 * \param dev_root DRI device proc dir entry.
 * \return always zero.
 *
 * Remove all proc entries created by proc_init().
 */
int DRM(proc_cleanup)(int minor, struct proc_dir_entry *root,
		      struct proc_dir_entry *dev_root)
{
	int  i;
	char name[64];

	if (!root || !dev_root) return 0;

	for (i = 0; i < DRM_PROC_ENTRIES; i++)
		remove_proc_entry(DRM(proc_list)[i].name, dev_root);
	sprintf(name, "%d", minor);
	remove_proc_entry(name, root);

	return 0;
}

/**
 * Called when "/proc/dri/.../name" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 * 
 * Prints the device name together with the bus id if available.
 */
static int DRM(name_info)(char *buf, char **start, off_t offset, int request,
			  int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int          len  = 0;

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof   = 0;

	if (dev->unique) {
		DRM_PROC_PRINT("%s 0x%lx %s\n",
			       dev->name, (long)old_encode_dev(dev->device), dev->unique);
	} else {
		DRM_PROC_PRINT("%s 0x%lx\n", dev->name, (long)old_encode_dev(dev->device));
	}

	if (len > request + offset) return request;
	*eof = 1;
	return len - offset;
}

/**
 * Called when "/proc/dri/.../vm" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 * 
 * Prints information about all mappings in drm_device::maplist.
 */
static int DRM(_vm_info)(char *buf, char **start, off_t offset, int request,
			 int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int          len  = 0;
	drm_map_t    *map;
	drm_map_list_t *r_list;
	struct list_head *list;

				/* Hardcoded from _DRM_FRAME_BUFFER,
                                   _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
                                   _DRM_SCATTER_GATHER. */
	const char   *types[] = { "FB", "REG", "SHM", "AGP", "SG" };
	const char   *type;
	int	     i;

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof   = 0;

	DRM_PROC_PRINT("slot	 offset	      size type flags	 "
		       "address mtrr\n\n");
	i = 0;
	if (dev->maplist != NULL) list_for_each(list, &dev->maplist->head) {
		r_list = list_entry(list, drm_map_list_t, head);
		map = r_list->map;
		if(!map) continue;
		if (map->type < 0 || map->type > 4) type = "??";
		else				    type = types[map->type];
		DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08lx ",
			       i,
			       map->offset,
			       map->size,
			       type,
			       map->flags,
			       (unsigned long)map->handle);
		if (map->mtrr < 0) {
			DRM_PROC_PRINT("none\n");
		} else {
			DRM_PROC_PRINT("%4d\n", map->mtrr);
		}
		i++;
	}

	if (len > request + offset) return request;
	*eof = 1;
	return len - offset;
}

/**
 * Simply calls _vm_info() while holding the drm_device::struct_sem lock.
 */
static int DRM(vm_info)(char *buf, char **start, off_t offset, int request,
			int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int	     ret;

	down(&dev->struct_sem);
	ret = DRM(_vm_info)(buf, start, offset, request, eof, data);
	up(&dev->struct_sem);
	return ret;
}

/**
 * Called when "/proc/dri/.../queues" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 */
static int DRM(_queues_info)(char *buf, char **start, off_t offset,
			     int request, int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int          len  = 0;
	int	     i;
	drm_queue_t  *q;

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof   = 0;

	DRM_PROC_PRINT("  ctx/flags   use   fin"
		       "   blk/rw/rwf  wait    flushed	   queued"
		       "      locks\n\n");
	for (i = 0; i < dev->queue_count; i++) {
		q = dev->queuelist[i];
		atomic_inc(&q->use_count);
		DRM_PROC_PRINT_RET(atomic_dec(&q->use_count),
				   "%5d/0x%03x %5d %5d"
				   " %5d/%c%c/%c%c%c %5Zd\n",
				   i,
				   q->flags,
				   atomic_read(&q->use_count),
				   atomic_read(&q->finalization),
				   atomic_read(&q->block_count),
				   atomic_read(&q->block_read) ? 'r' : '-',
				   atomic_read(&q->block_write) ? 'w' : '-',
				   waitqueue_active(&q->read_queue) ? 'r':'-',
				   waitqueue_active(&q->write_queue) ? 'w':'-',
				   waitqueue_active(&q->flush_queue) ? 'f':'-',
				   DRM_BUFCOUNT(&q->waitlist));
		atomic_dec(&q->use_count);
	}

	if (len > request + offset) return request;
	*eof = 1;
	return len - offset;
}

/**
 * Simply calls _queues_info() while holding the drm_device::struct_sem lock.
 */
static int DRM(queues_info)(char *buf, char **start, off_t offset, int request,
			    int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int	     ret;

	down(&dev->struct_sem);
	ret = DRM(_queues_info)(buf, start, offset, request, eof, data);
	up(&dev->struct_sem);
	return ret;
}

/**
 * Called when "/proc/dri/.../bufs" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 */
static int DRM(_bufs_info)(char *buf, char **start, off_t offset, int request,
			   int *eof, void *data)
{
	drm_device_t	 *dev = (drm_device_t *)data;
	int              len  = 0;
	drm_device_dma_t *dma = dev->dma;
	int		 i;

	if (!dma || offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof   = 0;

	DRM_PROC_PRINT(" o     size count  free	 segs pages    kB\n\n");
	for (i = 0; i <= DRM_MAX_ORDER; i++) {
		if (dma->bufs[i].buf_count)
			DRM_PROC_PRINT("%2d %8d %5d %5d %5d %5d %5ld\n",
				       i,
				       dma->bufs[i].buf_size,
				       dma->bufs[i].buf_count,
				       atomic_read(&dma->bufs[i]
						   .freelist.count),
				       dma->bufs[i].seg_count,
				       dma->bufs[i].seg_count
				       *(1 << dma->bufs[i].page_order),
				       (dma->bufs[i].seg_count
					* (1 << dma->bufs[i].page_order))
				       * PAGE_SIZE / 1024);
	}
	DRM_PROC_PRINT("\n");
	for (i = 0; i < dma->buf_count; i++) {
		if (i && !(i%32)) DRM_PROC_PRINT("\n");
		DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
	}
	DRM_PROC_PRINT("\n");

	if (len > request + offset) return request;
	*eof = 1;
	return len - offset;
}

/**
 * Simply calls _bufs_info() while holding the drm_device::struct_sem lock.
 */
static int DRM(bufs_info)(char *buf, char **start, off_t offset, int request,
			  int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int	     ret;

	down(&dev->struct_sem);
	ret = DRM(_bufs_info)(buf, start, offset, request, eof, data);
	up(&dev->struct_sem);
	return ret;
}

/**
 * Called when "/proc/dri/.../clients" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 */
static int DRM(_clients_info)(char *buf, char **start, off_t offset,
			      int request, int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int          len  = 0;
	drm_file_t   *priv;

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof   = 0;

	DRM_PROC_PRINT("a dev	pid    uid	magic	  ioctls\n\n");
	for (priv = dev->file_first; priv; priv = priv->next) {
		DRM_PROC_PRINT("%c %3d %5d %5d %10u %10lu\n",
			       priv->authenticated ? 'y' : 'n',
			       priv->minor,
			       priv->pid,
			       priv->uid,
			       priv->magic,
			       priv->ioctl_count);
	}

	if (len > request + offset) return request;
	*eof = 1;
	return len - offset;
}

/**
 * Simply calls _clients_info() while holding the drm_device::struct_sem lock.
 */
static int DRM(clients_info)(char *buf, char **start, off_t offset,
			     int request, int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int	     ret;

	down(&dev->struct_sem);
	ret = DRM(_clients_info)(buf, start, offset, request, eof, data);
	up(&dev->struct_sem);
	return ret;
}

#if DRM_DEBUG_CODE

static int DRM(_vma_info)(char *buf, char **start, off_t offset, int request,
			  int *eof, void *data)
{
	drm_device_t	      *dev = (drm_device_t *)data;
	int                   len  = 0;
	drm_vma_entry_t	      *pt;
	struct vm_area_struct *vma;
#if defined(__i386__)
	unsigned int	      pgprot;
#endif

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof   = 0;

	DRM_PROC_PRINT("vma use count: %d, high_memory = %p, 0x%08lx\n",
		       atomic_read(&dev->vma_count),
		       high_memory, virt_to_phys(high_memory));
	for (pt = dev->vmalist; pt; pt = pt->next) {
		if (!(vma = pt->vma)) continue;
		DRM_PROC_PRINT("\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx",
			       pt->pid,
			       vma->vm_start,
			       vma->vm_end,
			       vma->vm_flags & VM_READ	   ? 'r' : '-',
			       vma->vm_flags & VM_WRITE	   ? 'w' : '-',
			       vma->vm_flags & VM_EXEC	   ? 'x' : '-',
			       vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
			       vma->vm_flags & VM_LOCKED   ? 'l' : '-',
			       vma->vm_flags & VM_IO	   ? 'i' : '-',
			       VM_OFFSET(vma));

#if defined(__i386__)
		pgprot = pgprot_val(vma->vm_page_prot);
		DRM_PROC_PRINT(" %c%c%c%c%c%c%c%c%c",
			       pgprot & _PAGE_PRESENT  ? 'p' : '-',
			       pgprot & _PAGE_RW       ? 'w' : 'r',
			       pgprot & _PAGE_USER     ? 'u' : 's',
			       pgprot & _PAGE_PWT      ? 't' : 'b',
			       pgprot & _PAGE_PCD      ? 'u' : 'c',
			       pgprot & _PAGE_ACCESSED ? 'a' : '-',
			       pgprot & _PAGE_DIRTY    ? 'd' : '-',
			       pgprot & _PAGE_PSE      ? 'm' : 'k',
			       pgprot & _PAGE_GLOBAL   ? 'g' : 'l' );
#endif
		DRM_PROC_PRINT("\n");
	}

	if (len > request + offset) return request;
	*eof = 1;
	return len - offset;
}

static int DRM(vma_info)(char *buf, char **start, off_t offset, int request,
			 int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int	     ret;

	down(&dev->struct_sem);
	ret = DRM(_vma_info)(buf, start, offset, request, eof, data);
	up(&dev->struct_sem);
	return ret;
}
#endif