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path: root/bsd-core/drm_ioctl.c
AgeCommit message (Expand)Author
2007-08-15Bug #11989: Fix regression in getstats ioctl (kernel panic).vehemens
2007-08-15BSD: Fix regression in setversion ioctl (current version not returned).Eric Anholt
2007-08-15BSD: Replace brief description in each file's first line with doxygen later on.Eric Anholt
2007-07-20Replace DRM_IOCTL_ARGS with (dev, data, file_priv) and remove DRM_DEVICE.Eric Anholt
2007-07-20Remove DRM_ERR OS macro.Eric Anholt
2007-07-19Fix the getclient test (Need this feature for future tests).Eric Anholt
2005-08-05Rename the driver hooks in the DRM to something a little moreEric Anholt
2005-04-16Use /*- to begin license blocks in BSD code to reduce diffs against FreeBSDEric Anholt
2005-02-05- Implement drm_initmap, and extend it with the resource number to helpEric Anholt
2004-11-07Refine the locking of the DRM. Most significant is covering the driverEric Anholt
2004-11-07Now that the memory debug code is gone, and all 3 BSDs have M_ZERO, stopEric Anholt
2004-11-06Commit WIP of BSD conversion to core model. Compiles for r128, radeon, butEric Anholt
2003-11-05- Tie the DRM to a specific device: setunique no longer succeeds when givenEric Anholt
2003-10-23- Introduce a new ioctl, DRM_IOCTL_SET_VERSION. This ioctl allows theEric Anholt
2003-10-03Stylistic preparation for SMPng locking work: DRM_LOCK/DRM_UNLOCK have sideEric Anholt
2003-10-02Mostly whitespace cleanups and style(9) fixes focused on "if(" -> "if ("Eric Anholt
2003-08-19- Remove $FreeBSD$ tags as they weren't too useful and merges are now beingEric Anholt
2003-04-25Merge from FreeBSD-current.Eric Anholt
2003-04-24Remove more gamma DMA infrastructure. Most of this code was copied straightEric Anholt
2003-04-24Remove more gamma DMA code. This isn't all of it, but it's a major portion.Eric Anholt
2003-04-24Remove a bunch of dead code and fix spelling of a couple of comments.Eric Anholt
2003-03-11Merge back from FreeBSD-current, adding FreeBSD ID tags to aid futureEric Anholt
2003-02-21Merge from bsd-4-0-0-branch.Eric Anholt
2002-07-05merged bsd-3-0-0-branchAlan Hourihane
2002-01-27Initial revisionDavid Dawes
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/**
 * \file drm_memory_debug.h
 * Memory management wrappers for DRM.
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@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"

typedef struct drm_mem_stats {
	const char *name;
	int succeed_count;
	int free_count;
	int fail_count;
	unsigned long bytes_allocated;
	unsigned long bytes_freed;
} drm_mem_stats_t;

static spinlock_t drm_mem_lock = SPIN_LOCK_UNLOCKED;
static unsigned long drm_ram_available = 0;	/* In pages */
static unsigned long drm_ram_used = 0;
static drm_mem_stats_t drm_mem_stats[] =
{
	[DRM_MEM_DMA] = {"dmabufs"},
	[DRM_MEM_SAREA] = {"sareas"},
	[DRM_MEM_DRIVER] = {"driver"},
	[DRM_MEM_MAGIC] = {"magic"},
	[DRM_MEM_IOCTLS] = {"ioctltab"},
	[DRM_MEM_MAPS] = {"maplist"},
	[DRM_MEM_VMAS] = {"vmalist"},
	[DRM_MEM_BUFS] = {"buflist"},
	[DRM_MEM_SEGS] = {"seglist"},
	[DRM_MEM_PAGES] = {"pagelist"},
	[DRM_MEM_FILES] = {"files"},
	[DRM_MEM_QUEUES] = {"queues"},
	[DRM_MEM_CMDS] = {"commands"},
	[DRM_MEM_MAPPINGS] = {"mappings"},
	[DRM_MEM_BUFLISTS] = {"buflists"},
	[DRM_MEM_AGPLISTS] = {"agplist"},
	[DRM_MEM_SGLISTS] = {"sglist"},
	[DRM_MEM_TOTALAGP] = {"totalagp"},
	[DRM_MEM_BOUNDAGP] = {"boundagp"},
	[DRM_MEM_CTXBITMAP] = {"ctxbitmap"},
	[DRM_MEM_CTXLIST] = {"ctxlist"},
	[DRM_MEM_STUB] = {"stub"},
	{NULL, 0,}		/* Last entry must be null */
};

void drm_mem_init (void) {
	drm_mem_stats_t *mem;
	struct sysinfo si;

	for (mem = drm_mem_stats; mem->name; ++mem) {
		mem->succeed_count = 0;
		mem->free_count = 0;
		mem->fail_count = 0;
		mem->bytes_allocated = 0;
		mem->bytes_freed = 0;
	}

	si_meminfo(&si);
	drm_ram_available = si.totalram;
	drm_ram_used = 0;
}

/* drm_mem_info is called whenever a process reads /dev/drm/mem. */

static int drm__mem_info (char *buf, char **start, off_t offset,
			   int request, int *eof, void *data) {
	drm_mem_stats_t *pt;
	int len = 0;

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

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

	DRM_PROC_PRINT("		  total counts			"
		       " |    outstanding  \n");
	DRM_PROC_PRINT("type	   alloc freed fail	bytes	   freed"
		       " | allocs      bytes\n\n");
	DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
		       "system", 0, 0, 0,
		       drm_ram_available << (PAGE_SHIFT - 10));
	DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
		       "locked", 0, 0, 0, drm_ram_used >> 10);
	DRM_PROC_PRINT("\n");
	for (pt = drm_mem_stats; pt->name; pt++) {
		DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu %10lu | %6d %10ld\n",
			       pt->name,
			       pt->succeed_count,
			       pt->free_count,
			       pt->fail_count,
			       pt->bytes_allocated,
			       pt->bytes_freed,
			       pt->succeed_count - pt->free_count,
			       (long)pt->bytes_allocated
			       - (long)pt->bytes_freed);
	}

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

int drm_mem_info (char *buf, char **start, off_t offset,
		   int len, int *eof, void *data) {
	int ret;

	spin_lock(&drm_mem_lock);
	ret = drm__mem_info (buf, start, offset, len, eof, data);
	spin_unlock(&drm_mem_lock);
	return ret;
}

void *drm_alloc (size_t size, int area) {
	void *pt;

	if (!size) {
		DRM_MEM_ERROR(area, "Allocating 0 bytes\n");
		return NULL;
	}

	if (!(pt = kmalloc(size, GFP_KERNEL))) {
		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;
	spin_unlock(&drm_mem_lock);
	return pt;
}

void *drm_calloc (size_t nmemb, size_t size, int area) {
	void *addr;

	addr = drm_alloc (nmemb * size, area);
	if (addr != NULL)
		memset((void *)addr, 0, size * nmemb);

	return addr;
}

void *drm_realloc (void *oldpt, size_t oldsize, size_t size, int area) {
	void *pt;

	if (!(pt = drm_alloc (size, area)))
		return NULL;
	if (oldpt && oldsize) {
		memcpy(pt, oldpt, oldsize);
		drm_free (oldpt, oldsize, area);
	}
	return pt;
}

void drm_free (void *pt, size_t size, int area) {
	int alloc_count;
	int free_count;

	if (!pt)
		DRM_MEM_ERROR(area, "Attempt to free NULL pointer\n");
	else
		kfree(pt);
	spin_lock(&drm_mem_lock);
	drm_mem_stats[area].bytes_freed += size;
	free_count = ++drm_mem_stats[area].free_count;
	alloc_count = drm_mem_stats[area].succeed_count;
	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);
	}
}

unsigned long drm_alloc_pages (int order, int area) {
	unsigned long address;
	unsigned long bytes = PAGE_SIZE << order;
	unsigned long addr;
	unsigned int sz;

	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);

	address = __get_free_pages(GFP_KERNEL, order);
	if (!address) {
		spin_lock(&drm_mem_lock);
		++drm_mem_stats[area].fail_count;
		spin_unlock(&drm_mem_lock);
		return 0;
	}
	spin_lock(&drm_mem_lock);
	++drm_mem_stats[area].succeed_count;
	drm_mem_stats[area].bytes_allocated += bytes;
	drm_ram_used += bytes;
	spin_unlock(&drm_mem_lock);

	/* Zero outside the lock */
	memset((void *)address, 0, bytes);

	/* Reserve */
	for (addr = address, sz = bytes;
	     sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
		SetPageReserved(virt_to_page(addr));
	}

	return address;
}

void drm_free_pages (unsigned long address, int order, int area) {
	unsigned long bytes = PAGE_SIZE << order;
	int alloc_count;
	int free_count;
	unsigned long addr;
	unsigned int sz;

	if (!address) {
		DRM_MEM_ERROR(area, "Attempt to free address 0\n");
	} else {
		/* Unreserve */
		for (addr = address, sz = bytes;
		     sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
			ClearPageReserved(virt_to_page(addr));
		}
		free_pages(address, order);
	}

	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 += bytes;
	drm_ram_used -= bytes;
	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);
	}
}

#if __OS_HAS_AGP

DRM_AGP_MEM *drm_alloc_agp (struct drm_device *dev, int pages, u32 type) {
	DRM_AGP_MEM *handle;

	if (!pages) {
		DRM_MEM_ERROR(DRM_MEM_TOTALAGP, "Allocating 0 pages\n");
		return NULL;
	}

	if ((handle = drm_agp_allocate_memory (pages, type))) {
		spin_lock(&drm_mem_lock);
		++drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
		drm_mem_stats[DRM_MEM_TOTALAGP].bytes_allocated
		    += pages << PAGE_SHIFT;
		spin_unlock(&drm_mem_lock);
		return handle;
	}
	spin_lock(&drm_mem_lock);
	++drm_mem_stats[DRM_MEM_TOTALAGP].fail_count;
	spin_unlock(&drm_mem_lock);
	return NULL;
}

int drm_free_agp (DRM_AGP_MEM * handle, int pages) {
	int alloc_count;
	int free_count;
	int retval = -EINVAL;

	if (!handle) {
		DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
			      "Attempt to free NULL AGP handle\n");
		return retval;
	}

	if (drm_agp_free_memory (handle)) {
		spin_lock(&drm_mem_lock);
		free_count = ++drm_mem_stats[DRM_MEM_TOTALAGP].free_count;
		alloc_count = drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
		drm_mem_stats[DRM_MEM_TOTALAGP].bytes_freed
		    += pages << PAGE_SHIFT;
		spin_unlock(&drm_mem_lock);
		if (free_count > alloc_count) {
			DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
				      "Excess frees: %d frees, %d allocs\n",
				      free_count, alloc_count);
		}
		return 0;
	}
	return retval;
}

int drm_bind_agp (DRM_AGP_MEM * handle, unsigned int start) {
	int retcode = -EINVAL;

	if (!handle) {
		DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
			      "Attempt to bind NULL AGP handle\n");
		return retcode;
	}

	if (!(retcode = drm_agp_bind_memory (handle, start))) {
		spin_lock(&drm_mem_lock);
		++drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
		drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_allocated
		    += handle->page_count << PAGE_SHIFT;
		spin_unlock(&drm_mem_lock);
		return retcode;
	}
	spin_lock(&drm_mem_lock);
	++drm_mem_stats[DRM_MEM_BOUNDAGP].fail_count;
	spin_unlock(&drm_mem_lock);
	return retcode;
}

int drm_unbind_agp (DRM_AGP_MEM * handle) {
	int alloc_count;
	int free_count;
	int retcode = -EINVAL;

	if (!handle) {
		DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
			      "Attempt to unbind NULL AGP handle\n");
		return retcode;
	}

	if ((retcode = drm_agp_unbind_memory (handle)))
		return retcode;
	spin_lock(&drm_mem_lock);
	free_count = ++drm_mem_stats[DRM_MEM_BOUNDAGP].free_count;
	alloc_count = drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
	drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_freed
	    += handle->page_count << PAGE_SHIFT;
	spin_unlock(&drm_mem_lock);
	if (free_count > alloc_count) {
		DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
			      "Excess frees: %d frees, %d allocs\n",
			      free_count, alloc_count);
	}
	return retcode;
}
#endif
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