drivers/char/drm/sis_mm.c - third_party/linux - Git at Google

 /**************************************************************************
  *
  * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA.
  * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
  * THE COPYRIGHT HOLDERS, AUTHORS 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:
  *    Thomas Hellström <thomas-at-tungstengraphics-dot-com>
  */

 #include "drmP.h"
 #include "sis_drm.h"
 #include "sis_drv.h"

 #include <video/sisfb.h>

 #define VIDEO_TYPE 0
 #define AGP_TYPE 1


 #if defined(CONFIG_FB_SIS)
 /* fb management via fb device */

 #define SIS_MM_ALIGN_SHIFT 0
 #define SIS_MM_ALIGN_MASK 0

 static void *sis_sman_mm_allocate(void *private, unsigned long size,
 				  unsigned alignment)
 {
 	struct sis_memreq req;

 	req.size = size;
 	sis_malloc(&req);
 	if (req.size == 0)
 		return NULL;
 	else
 		return (void *)~req.offset;
 }

 static void sis_sman_mm_free(void *private, void *ref)
 {
 	sis_free(~((unsigned long)ref));
 }

 static void sis_sman_mm_destroy(void *private)
 {
 	;
 }

 static unsigned long sis_sman_mm_offset(void *private, void *ref)
 {
 	return ~((unsigned long)ref);
 }

 #else /* CONFIG_FB_SIS */

 #define SIS_MM_ALIGN_SHIFT 4
 #define SIS_MM_ALIGN_MASK ( (1 << SIS_MM_ALIGN_SHIFT) - 1)

 #endif /* CONFIG_FB_SIS */

 static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
 {
 	drm_sis_private_t *dev_priv = dev->dev_private;
 	drm_sis_fb_t *fb = data;
 	int ret;

 	mutex_lock(&dev->struct_mutex);
 #if defined(CONFIG_FB_SIS)
 	{
 		struct drm_sman_mm sman_mm;
 		sman_mm.private = (void *)0xFFFFFFFF;
 		sman_mm.allocate = sis_sman_mm_allocate;
 		sman_mm.free = sis_sman_mm_free;
 		sman_mm.destroy = sis_sman_mm_destroy;
 		sman_mm.offset = sis_sman_mm_offset;
 		ret =
 		    drm_sman_set_manager(&dev_priv->sman, VIDEO_TYPE, &sman_mm);
 	}
 #else
 	ret = drm_sman_set_range(&dev_priv->sman, VIDEO_TYPE, 0,
 				 fb->size >> SIS_MM_ALIGN_SHIFT);
 #endif

 	if (ret) {
 		DRM_ERROR("VRAM memory manager initialisation error\n");
 		mutex_unlock(&dev->struct_mutex);
 		return ret;
 	}

 	dev_priv->vram_initialized = 1;
 	dev_priv->vram_offset = fb->offset;

 	mutex_unlock(&dev->struct_mutex);
 	DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);

 	return 0;
 }

 static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file_priv,
 			 void *data, int pool)
 {
 	drm_sis_private_t *dev_priv = dev->dev_private;
 	drm_sis_mem_t *mem = data;
 	int retval = 0;
 	struct drm_memblock_item *item;

 	mutex_lock(&dev->struct_mutex);

 	if (0 == ((pool == 0) ? dev_priv->vram_initialized :
 		      dev_priv->agp_initialized)) {
 		DRM_ERROR
 		    ("Attempt to allocate from uninitialized memory manager.\n");
 		mutex_unlock(&dev->struct_mutex);
 		return -EINVAL;
 	}

 	mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
 	item = drm_sman_alloc(&dev_priv->sman, pool, mem->size, 0,
 			      (unsigned long)file_priv);

 	mutex_unlock(&dev->struct_mutex);
 	if (item) {
 		mem->offset = ((pool == 0) ?
 			      dev_priv->vram_offset : dev_priv->agp_offset) +
 		    (item->mm->
 		     offset(item->mm, item->mm_info) << SIS_MM_ALIGN_SHIFT);
 		mem->free = item->user_hash.key;
 		mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
 	} else {
 		mem->offset = 0;
 		mem->size = 0;
 		mem->free = 0;
 		retval = -ENOMEM;
 	}

 	DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem->size,
 		  mem->offset);

 	return retval;
 }

 static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
 {
 	drm_sis_private_t *dev_priv = dev->dev_private;
 	drm_sis_mem_t *mem = data;
 	int ret;

 	mutex_lock(&dev->struct_mutex);
 	ret = drm_sman_free_key(&dev_priv->sman, mem->free);
 	mutex_unlock(&dev->struct_mutex);
 	DRM_DEBUG("free = 0x%lx\n", mem->free);

 	return ret;
 }

 static int sis_fb_alloc(struct drm_device *dev, void *data,
 			struct drm_file *file_priv)
 {
 	return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
 }

 static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
 			      struct drm_file *file_priv)
 {
 	drm_sis_private_t *dev_priv = dev->dev_private;
 	drm_sis_agp_t *agp = data;
 	int ret;
 	dev_priv = dev->dev_private;

 	mutex_lock(&dev->struct_mutex);
 	ret = drm_sman_set_range(&dev_priv->sman, AGP_TYPE, 0,
 				 agp->size >> SIS_MM_ALIGN_SHIFT);

 	if (ret) {
 		DRM_ERROR("AGP memory manager initialisation error\n");
 		mutex_unlock(&dev->struct_mutex);
 		return ret;
 	}

 	dev_priv->agp_initialized = 1;
 	dev_priv->agp_offset = agp->offset;
 	mutex_unlock(&dev->struct_mutex);

 	DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
 	return 0;
 }

 static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
 			       struct drm_file *file_priv)
 {

 	return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
 }

 static drm_local_map_t *sis_reg_init(struct drm_device *dev)
 {
 	struct drm_map_list *entry;
 	drm_local_map_t *map;

 	list_for_each_entry(entry, &dev->maplist, head) {
 		map = entry->map;
 		if (!map)
 			continue;
 		if (map->type == _DRM_REGISTERS) {
 			return map;
 		}
 	}
 	return NULL;
 }

 int sis_idle(struct drm_device *dev)
 {
 	drm_sis_private_t *dev_priv = dev->dev_private;
 	uint32_t idle_reg;
 	unsigned long end;
 	int i;

 	if (dev_priv->idle_fault)
 		return 0;

 	if (dev_priv->mmio == NULL) {
 		dev_priv->mmio = sis_reg_init(dev);
 		if (dev_priv->mmio == NULL) {
 			DRM_ERROR("Could not find register map.\n");
 			return 0;
 		}
 	}

 	/*
 	 * Implement a device switch here if needed
 	 */

 	if (dev_priv->chipset != SIS_CHIP_315)
 		return 0;

 	/*
 	 * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
 	 * because its polling frequency is too low.
 	 */

 	end = jiffies + (DRM_HZ * 3);

 	for (i=0; i<4; ++i) {
 		do {
 			idle_reg = SIS_READ(0x85cc);
 		} while ( !time_after_eq(jiffies, end) &&
 			  ((idle_reg & 0x80000000) != 0x80000000));
 	}

 	if (time_after_eq(jiffies, end)) {
 		DRM_ERROR("Graphics engine idle timeout. "
 			  "Disabling idle check\n");
 		dev_priv->idle_fault = 1;
 	}

 	/*
 	 * The caller never sees an error code. It gets trapped
 	 * in libdrm.
 	 */

 	return 0;
 }


 void sis_lastclose(struct drm_device *dev)
 {
 	drm_sis_private_t *dev_priv = dev->dev_private;

 	if (!dev_priv)
 		return;

 	mutex_lock(&dev->struct_mutex);
 	drm_sman_cleanup(&dev_priv->sman);
 	dev_priv->vram_initialized = 0;
 	dev_priv->agp_initialized = 0;
 	dev_priv->mmio = NULL;
 	mutex_unlock(&dev->struct_mutex);
 }

 void sis_reclaim_buffers_locked(struct drm_device * dev,
 				struct drm_file *file_priv)
 {
 	drm_sis_private_t *dev_priv = dev->dev_private;

 	mutex_lock(&dev->struct_mutex);
 	if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)file_priv)) {
 		mutex_unlock(&dev->struct_mutex);
 		return;
 	}

 	if (dev->driver->dma_quiescent) {
 		dev->driver->dma_quiescent(dev);
 	}

 	drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)file_priv);
 	mutex_unlock(&dev->struct_mutex);
 	return;
 }

 struct drm_ioctl_desc sis_ioctls[] = {
 	DRM_IOCTL_DEF(DRM_SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
 	DRM_IOCTL_DEF(DRM_SIS_FB_FREE, sis_drm_free, DRM_AUTH),
 	DRM_IOCTL_DEF(DRM_SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF(DRM_SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
 	DRM_IOCTL_DEF(DRM_SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
 	DRM_IOCTL_DEF(DRM_SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 };

 int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);
	/**************************************************************************
	*
	* Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA.
	* 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDERS, AUTHORS 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:
	* Thomas Hellström <thomas-at-tungstengraphics-dot-com>
	*/

	#include "drmP.h"
	#include "sis_drm.h"
	#include "sis_drv.h"

	#include <video/sisfb.h>

	#define VIDEO_TYPE 0
	#define AGP_TYPE 1


	#if defined(CONFIG_FB_SIS)
	/* fb management via fb device */

	#define SIS_MM_ALIGN_SHIFT 0
	#define SIS_MM_ALIGN_MASK 0

	static void sis_sman_mm_allocate(void private, unsigned long size,
	unsigned alignment)
	{
	struct sis_memreq req;

	req.size = size;
	sis_malloc(&req);
	if (req.size == 0)
	return NULL;
	else
	return (void *)~req.offset;
	}

	static void sis_sman_mm_free(void private, void ref)
	{
	sis_free(~((unsigned long)ref));
	}

	static void sis_sman_mm_destroy(void *private)
	{
	;
	}

	static unsigned long sis_sman_mm_offset(void private, void ref)
	{
	return ~((unsigned long)ref);
	}

	#else /* CONFIG_FB_SIS */

	#define SIS_MM_ALIGN_SHIFT 4
	#define SIS_MM_ALIGN_MASK ( (1 << SIS_MM_ALIGN_SHIFT) - 1)

	#endif /* CONFIG_FB_SIS */

	static int sis_fb_init(struct drm_device dev, void data, struct drm_file *file_priv)
	{
	drm_sis_private_t *dev_priv = dev->dev_private;
	drm_sis_fb_t *fb = data;
	int ret;

	mutex_lock(&dev->struct_mutex);
	#if defined(CONFIG_FB_SIS)
	{
	struct drm_sman_mm sman_mm;
	sman_mm.private = (void *)0xFFFFFFFF;
	sman_mm.allocate = sis_sman_mm_allocate;
	sman_mm.free = sis_sman_mm_free;
	sman_mm.destroy = sis_sman_mm_destroy;
	sman_mm.offset = sis_sman_mm_offset;
	ret =
	drm_sman_set_manager(&dev_priv->sman, VIDEO_TYPE, &sman_mm);
	}
	#else
	ret = drm_sman_set_range(&dev_priv->sman, VIDEO_TYPE, 0,
	fb->size >> SIS_MM_ALIGN_SHIFT);
	#endif

	if (ret) {
	DRM_ERROR("VRAM memory manager initialisation error\n");
	mutex_unlock(&dev->struct_mutex);
	return ret;
	}

	dev_priv->vram_initialized = 1;
	dev_priv->vram_offset = fb->offset;

	mutex_unlock(&dev->struct_mutex);
	DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);

	return 0;
	}

	static int sis_drm_alloc(struct drm_device dev, struct drm_file file_priv,
	void *data, int pool)
	{
	drm_sis_private_t *dev_priv = dev->dev_private;
	drm_sis_mem_t *mem = data;
	int retval = 0;
	struct drm_memblock_item *item;

	mutex_lock(&dev->struct_mutex);

	if (0 == ((pool == 0) ? dev_priv->vram_initialized :
	dev_priv->agp_initialized)) {
	DRM_ERROR
	("Attempt to allocate from uninitialized memory manager.\n");
	mutex_unlock(&dev->struct_mutex);
	return -EINVAL;
	}

	mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
	item = drm_sman_alloc(&dev_priv->sman, pool, mem->size, 0,
	(unsigned long)file_priv);

	mutex_unlock(&dev->struct_mutex);
	if (item) {
	mem->offset = ((pool == 0) ?
	dev_priv->vram_offset : dev_priv->agp_offset) +
	(item->mm->
	offset(item->mm, item->mm_info) << SIS_MM_ALIGN_SHIFT);
	mem->free = item->user_hash.key;
	mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
	} else {
	mem->offset = 0;
	mem->size = 0;
	mem->free = 0;
	retval = -ENOMEM;
	}

	DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem->size,
	mem->offset);

	return retval;
	}

	static int sis_drm_free(struct drm_device dev, void data, struct drm_file *file_priv)
	{
	drm_sis_private_t *dev_priv = dev->dev_private;
	drm_sis_mem_t *mem = data;
	int ret;

	mutex_lock(&dev->struct_mutex);
	ret = drm_sman_free_key(&dev_priv->sman, mem->free);
	mutex_unlock(&dev->struct_mutex);
	DRM_DEBUG("free = 0x%lx\n", mem->free);

	return ret;
	}

	static int sis_fb_alloc(struct drm_device dev, void data,
	struct drm_file *file_priv)
	{
	return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
	}

	static int sis_ioctl_agp_init(struct drm_device dev, void data,
	struct drm_file *file_priv)
	{
	drm_sis_private_t *dev_priv = dev->dev_private;
	drm_sis_agp_t *agp = data;
	int ret;
	dev_priv = dev->dev_private;

	mutex_lock(&dev->struct_mutex);
	ret = drm_sman_set_range(&dev_priv->sman, AGP_TYPE, 0,
	agp->size >> SIS_MM_ALIGN_SHIFT);

	if (ret) {
	DRM_ERROR("AGP memory manager initialisation error\n");
	mutex_unlock(&dev->struct_mutex);
	return ret;
	}

	dev_priv->agp_initialized = 1;
	dev_priv->agp_offset = agp->offset;
	mutex_unlock(&dev->struct_mutex);

	DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
	return 0;
	}

	static int sis_ioctl_agp_alloc(struct drm_device dev, void data,
	struct drm_file *file_priv)
	{

	return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
	}

	static drm_local_map_t sis_reg_init(struct drm_device dev)
	{
	struct drm_map_list *entry;
	drm_local_map_t *map;

	list_for_each_entry(entry, &dev->maplist, head) {
	map = entry->map;
	if (!map)
	continue;
	if (map->type == _DRM_REGISTERS) {
	return map;
	}
	}
	return NULL;
	}

	int sis_idle(struct drm_device *dev)
	{
	drm_sis_private_t *dev_priv = dev->dev_private;
	uint32_t idle_reg;
	unsigned long end;
	int i;

	if (dev_priv->idle_fault)
	return 0;

	if (dev_priv->mmio == NULL) {
	dev_priv->mmio = sis_reg_init(dev);
	if (dev_priv->mmio == NULL) {
	DRM_ERROR("Could not find register map.\n");
	return 0;
	}
	}

	/*
	* Implement a device switch here if needed
	*/

	if (dev_priv->chipset != SIS_CHIP_315)
	return 0;

	/*
	* Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
	* because its polling frequency is too low.
	*/

	end = jiffies + (DRM_HZ * 3);

	for (i=0; i<4; ++i) {
	do {
	idle_reg = SIS_READ(0x85cc);
	} while ( !time_after_eq(jiffies, end) &&
	((idle_reg & 0x80000000) != 0x80000000));
	}

	if (time_after_eq(jiffies, end)) {
	DRM_ERROR("Graphics engine idle timeout. "
	"Disabling idle check\n");
	dev_priv->idle_fault = 1;
	}

	/*
	* The caller never sees an error code. It gets trapped
	* in libdrm.
	*/

	return 0;
	}


	void sis_lastclose(struct drm_device *dev)
	{
	drm_sis_private_t *dev_priv = dev->dev_private;

	if (!dev_priv)
	return;

	mutex_lock(&dev->struct_mutex);
	drm_sman_cleanup(&dev_priv->sman);
	dev_priv->vram_initialized = 0;
	dev_priv->agp_initialized = 0;
	dev_priv->mmio = NULL;
	mutex_unlock(&dev->struct_mutex);
	}

	void sis_reclaim_buffers_locked(struct drm_device * dev,
	struct drm_file *file_priv)
	{
	drm_sis_private_t *dev_priv = dev->dev_private;

	mutex_lock(&dev->struct_mutex);
	if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)file_priv)) {
	mutex_unlock(&dev->struct_mutex);
	return;
	}

	if (dev->driver->dma_quiescent) {
	dev->driver->dma_quiescent(dev);
	}

	drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)file_priv);
	mutex_unlock(&dev->struct_mutex);
	return;
	}

	struct drm_ioctl_desc sis_ioctls[] = {
	DRM_IOCTL_DEF(DRM_SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_SIS_FB_FREE, sis_drm_free, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH \| DRM_MASTER \| DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_SIS_FB_INIT, sis_fb_init, DRM_AUTH \| DRM_MASTER \| DRM_ROOT_ONLY),
	};

	int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);