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drm/linux/agpsupport.c

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/* agpsupport.c -- DRM support for AGP/GART backend -*- linux-c -*-
* Created: Mon Dec 13 09:56:45 1999 by faith@precisioninsight.com
*
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* 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.
*
* Author: Rickard E. (Rik) Faith <faith@precisioninsight.com>
*
* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/agpsupport.c,v 1.1 2000/02/11 17:26:02 dawes Exp $
*
*/
#define __NO_VERSION__
#include "drmP.h"
drm_agp_func_t drm_agp = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
/* The C standard says that 'void *' is not guaranteed to hold a function
pointer, so we use this union to define a generic pointer that is
guaranteed to hold any of the function pointers we care about. */
typedef union {
void (*free_memory)(agp_memory *);
agp_memory *(*allocate_memory)(size_t, u32);
int (*bind_memory)(agp_memory *, off_t);
int (*unbind_memory)(agp_memory *);
void (*enable)(u32);
int (*acquire)(void);
void (*release)(void);
void (*copy_info)(agp_kern_info *);
unsigned long address;
} drm_agp_func_u;
typedef struct drm_agp_fill {
const char *name;
drm_agp_func_u *f;
} drm_agp_fill_t;
static drm_agp_fill_t drm_agp_fill[] = {
{ __MODULE_STRING(agp_free_memory),
(drm_agp_func_u *)&drm_agp.free_memory },
{ __MODULE_STRING(agp_allocate_memory),
(drm_agp_func_u *)&drm_agp.allocate_memory },
{ __MODULE_STRING(agp_bind_memory),
(drm_agp_func_u *)&drm_agp.bind_memory },
{ __MODULE_STRING(agp_unbind_memory),
(drm_agp_func_u *)&drm_agp.unbind_memory },
{ __MODULE_STRING(agp_enable),
(drm_agp_func_u *)&drm_agp.enable },
{ __MODULE_STRING(agp_backend_acquire),
(drm_agp_func_u *)&drm_agp.acquire },
{ __MODULE_STRING(agp_backend_release),
(drm_agp_func_u *)&drm_agp.release },
{ __MODULE_STRING(agp_copy_info),
(drm_agp_func_u *)&drm_agp.copy_info },
{ NULL, NULL }
};
int drm_agp_info(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
agp_kern_info *kern;
drm_agp_info_t info;
if (!dev->agp->acquired || !drm_agp.copy_info) return -EINVAL;
kern = &dev->agp->agp_info;
info.agp_version_major = kern->version.major;
info.agp_version_minor = kern->version.minor;
info.mode = kern->mode;
info.aperture_base = kern->aper_base;
info.aperture_size = kern->aper_size * 1024 * 1024;
info.memory_allowed = kern->max_memory << PAGE_SHIFT;
info.memory_used = kern->current_memory << PAGE_SHIFT;
info.id_vendor = kern->device->vendor;
info.id_device = kern->device->device;
copy_to_user_ret((drm_agp_info_t *)arg, &info, sizeof(info), -EFAULT);
return 0;
}
int drm_agp_acquire(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
int retcode;
if (dev->agp->acquired || !drm_agp.acquire) return -EINVAL;
if ((retcode = (*drm_agp.acquire)())) return retcode;
dev->agp->acquired = 1;
return 0;
}
int drm_agp_release(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
if (!dev->agp->acquired || !drm_agp.release) return -EINVAL;
(*drm_agp.release)();
dev->agp->acquired = 0;
return 0;
}
int drm_agp_enable(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_agp_mode_t mode;
if (!dev->agp->acquired || !drm_agp.enable) return -EINVAL;
copy_from_user_ret(&mode, (drm_agp_mode_t *)arg, sizeof(mode),
-EFAULT);
dev->agp->mode = mode.mode;
(*drm_agp.enable)(mode.mode);
dev->agp->base = dev->agp->agp_info.aper_base;
dev->agp->enabled = 1;
return 0;
}
int drm_agp_alloc(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_agp_buffer_t request;
drm_agp_mem_t *entry;
agp_memory *memory;
unsigned long pages;
u32 type;
if (!dev->agp->acquired) return -EINVAL;
copy_from_user_ret(&request, (drm_agp_buffer_t *)arg, sizeof(request),
-EFAULT);
if (!(entry = drm_alloc(sizeof(*entry), DRM_MEM_AGPLISTS)))
return -ENOMEM;
memset(entry, 0, sizeof(*entry));
pages = (request.size + PAGE_SIZE - 1) / PAGE_SIZE;
type = (u32) request.type;
if (!(memory = drm_alloc_agp(pages, type))) {
drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
return -ENOMEM;
}
entry->handle = (unsigned long)memory->memory;
entry->memory = memory;
entry->bound = 0;
entry->pages = pages;
entry->prev = NULL;
entry->next = dev->agp->memory;
if (dev->agp->memory) dev->agp->memory->prev = entry;
dev->agp->memory = entry;
request.handle = entry->handle;
request.physical = memory->physical;
if (copy_to_user((drm_agp_buffer_t *)arg, &request, sizeof(request))) {
dev->agp->memory = entry->next;
dev->agp->memory->prev = NULL;
drm_free_agp(memory, pages);
drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
return -EFAULT;
}
return 0;
}
static drm_agp_mem_t *drm_agp_lookup_entry(drm_device_t *dev,
unsigned long handle)
{
drm_agp_mem_t *entry;
for (entry = dev->agp->memory; entry; entry = entry->next) {
if (entry->handle == handle) return entry;
}
return NULL;
}
int drm_agp_unbind(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_agp_binding_t request;
drm_agp_mem_t *entry;
if (!dev->agp->acquired) return -EINVAL;
copy_from_user_ret(&request, (drm_agp_binding_t *)arg, sizeof(request),
-EFAULT);
if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
return -EINVAL;
if (!entry->bound) return -EINVAL;
return drm_unbind_agp(entry->memory);
}
int drm_agp_bind(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_agp_binding_t request;
drm_agp_mem_t *entry;
int retcode;
int page;
if (!dev->agp->acquired || !drm_agp.bind_memory) return -EINVAL;
copy_from_user_ret(&request, (drm_agp_binding_t *)arg, sizeof(request),
-EFAULT);
if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
return -EINVAL;
if (entry->bound) return -EINVAL;
page = (request.offset + PAGE_SIZE - 1) / PAGE_SIZE;
if ((retcode = drm_bind_agp(entry->memory, page))) return retcode;
entry->bound = dev->agp->base + (page << PAGE_SHIFT);
DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n",
dev->agp->base, entry->bound);
return 0;
}
int drm_agp_free(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_agp_buffer_t request;
drm_agp_mem_t *entry;
if (!dev->agp->acquired) return -EINVAL;
copy_from_user_ret(&request, (drm_agp_buffer_t *)arg, sizeof(request),
-EFAULT);
if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
return -EINVAL;
if (entry->bound) drm_unbind_agp(entry->memory);
if (entry->prev) entry->prev->next = entry->next;
else dev->agp->memory = entry->next;
if (entry->next) entry->next->prev = entry->prev;
drm_free_agp(entry->memory, entry->pages);
drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
return 0;
}
drm_agp_head_t *drm_agp_init(void)
{
drm_agp_fill_t *fill;
drm_agp_head_t *head = NULL;
int agp_available = 1;
for (fill = &drm_agp_fill[0]; fill->name; fill++) {
char *n = (char *)fill->name;
*fill->f = (drm_agp_func_u)get_module_symbol(NULL, n);
DRM_DEBUG("%s resolves to 0x%08lx\n", n, (*fill->f).address);
if (!(*fill->f).address) agp_available = 0;
}
DRM_DEBUG("agp_available = %d\n", agp_available);
if (agp_available) {
if (!(head = drm_alloc(sizeof(*head), DRM_MEM_AGPLISTS)))
return NULL;
memset((void *)head, 0, sizeof(*head));
(*drm_agp.copy_info)(&head->agp_info);
head->memory = NULL;
switch (head->agp_info.chipset) {
case INTEL_GENERIC: head->chipset = "Intel"; break;
case INTEL_LX: head->chipset = "Intel 440LX"; break;
case INTEL_BX: head->chipset = "Intel 440BX"; break;
case INTEL_GX: head->chipset = "Intel 440GX"; break;
case INTEL_I810: head->chipset = "Intel i810"; break;
case VIA_GENERIC: head->chipset = "VIA"; break;
case VIA_VP3: head->chipset = "VIA VP3"; break;
case VIA_MVP3: head->chipset = "VIA MVP3"; break;
case VIA_APOLLO_PRO: head->chipset = "VIA Apollo Pro"; break;
case SIS_GENERIC: head->chipset = "SiS"; break;
case AMD_GENERIC: head->chipset = "AMD"; break;
case AMD_IRONGATE: head->chipset = "AMD Irongate"; break;
case ALI_GENERIC: head->chipset = "ALi"; break;
case ALI_M1541: head->chipset = "ALi M1541"; break;
default:
}
DRM_INFO("AGP %d.%d on %s @ 0x%08lx %dMB\n",
head->agp_info.version.major,
head->agp_info.version.minor,
head->chipset,
head->agp_info.aper_base,
head->agp_info.aper_size);
}
return head;
}
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