drm/bsd-core/drm_agpsupport.c

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/*-
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* 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.
*
* Author:
* Rickard E. (Rik) Faith <faith@valinux.com>
* Gareth Hughes <gareth@valinux.com>
*
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*/
/** @file drm_agpsupport.c
* Support code for tying the kernel AGP support to DRM drivers and
* the DRM's AGP ioctls.
*/
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#include "drmP.h"
#ifdef __FreeBSD__
#if __FreeBSD_version >= 800004
#include <dev/agp/agpreg.h>
#else /* __FreeBSD_version >= 800004 */
#include <pci/agpreg.h>
#endif /* __FreeBSD_version >= 800004 */
#include <dev/pci/pcireg.h>
#endif
/* Returns 1 if AGP or 0 if not. */
static int
drm_device_find_capability(struct drm_device *dev, int cap)
{
#ifdef __FreeBSD__
#if __FreeBSD_version >= 602102
return (pci_find_extcap(dev->device, cap, NULL) == 0);
#else
/* Code taken from agp.c. IWBNI that was a public interface. */
u_int32_t status;
u_int8_t ptr, next;
/*
* Check the CAP_LIST bit of the PCI status register first.
*/
status = pci_read_config(dev->device, PCIR_STATUS, 2);
if (!(status & 0x10))
return 0;
/*
* Traverse the capabilities list.
*/
for (ptr = pci_read_config(dev->device, AGP_CAPPTR, 1);
ptr != 0;
ptr = next) {
u_int32_t capid = pci_read_config(dev->device, ptr, 4);
next = AGP_CAPID_GET_NEXT_PTR(capid);
/*
* If this capability entry ID is cap, then we are done.
*/
if (AGP_CAPID_GET_CAP_ID(capid) == cap)
return 1;
}
return 0;
#endif
#else
/* XXX: fill me in for non-FreeBSD */
return 1;
#endif
}
int drm_device_is_agp(struct drm_device *dev)
{
if (dev->driver->device_is_agp != NULL) {
int ret;
/* device_is_agp returns a tristate, 0 = not AGP, 1 = definitely
* AGP, 2 = fall back to PCI capability
*/
ret = (*dev->driver->device_is_agp)(dev);
if (ret != DRM_MIGHT_BE_AGP)
return ret;
}
return (drm_device_find_capability(dev, PCIY_AGP));
}
int drm_device_is_pcie(struct drm_device *dev)
{
return (drm_device_find_capability(dev, PCIY_EXPRESS));
}
int drm_agp_info(struct drm_device * dev, struct drm_agp_info *info)
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{
struct agp_info *kern;
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if (!dev->agp || !dev->agp->acquired)
return EINVAL;
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kern = &dev->agp->info;
agp_get_info(dev->agp->agpdev, kern);
info->agp_version_major = 1;
info->agp_version_minor = 0;
info->mode = kern->ai_mode;
info->aperture_base = kern->ai_aperture_base;
info->aperture_size = kern->ai_aperture_size;
info->memory_allowed = kern->ai_memory_allowed;
info->memory_used = kern->ai_memory_used;
info->id_vendor = kern->ai_devid & 0xffff;
info->id_device = kern->ai_devid >> 16;
return 0;
}
int drm_agp_info_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
int err;
struct drm_agp_info info;
err = drm_agp_info(dev, &info);
if (err != 0)
return err;
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*(struct drm_agp_info *) data = info;
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return 0;
}
int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
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{
return drm_agp_acquire(dev);
}
int drm_agp_acquire(struct drm_device *dev)
{
int retcode;
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if (!dev->agp || dev->agp->acquired)
return EINVAL;
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retcode = agp_acquire(dev->agp->agpdev);
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if (retcode)
return retcode;
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dev->agp->acquired = 1;
return 0;
}
int drm_agp_release_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
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{
Adds support for PCI cards to MGA DRM This patch adds serveral new ioctls and a new query to get_param query to support PCI MGA cards. Two ioctls were added to implement interrupt based waiting. With this change, the client-side driver no longer needs to map the primary DMA region or the MMIO region. Previously, end-of-frame waiting was done by busy waiting in the client-side driver until one of the MMIO registers (the current DMA pointer) matched a pointer to the end of primary DMA space. By using interrupts, the busy waiting and the extra mappings are removed. A third ioctl was added to bootstrap DMA. This ioctl, which is used by the X-server, moves a *LOT* of code from the X-server into the kernel. This allows the kernel to do whatever needs to be done to setup DMA buffers. The entire process and the locations of the buffers are hidden from user-mode. Additionally, a get_param query was added to differentiate between G4x0 cards and G550 cards. A gap was left in the numbering sequence so that, if needed, G450 cards could be distinguished from G400 cards. According to Ville Syrjälä, the G4x0 cards and the G550 cards handle anisotropic filtering differently. This seems the most compatible way to let the client-side driver know which card it's own. Doing this very small change now eliminates the need to bump the DRM minor version twice. http://marc.theaimsgroup.com/?l=dri-devel&m=106625815319773&w=2 A number of ioctl handlers in linux-core were also modified so that they could be called in-kernel. In these cases, the in-kernel callable version kept the existing name (e.g., drm_agp_acquire) and the ioctl handler added _ioctl to the name (e.g., drm_agp_acquire_ioctl). This patch also replaces the drm_agp_do_release function with drm_agp_release. drm_agp_release (drm_core_agp_release in the previous patch) is very similar to drm_agp_do_release, and I saw no reason to have both. This commit *breaks the build* on BSD. Eric said that he would make the required updates to the BSD side soon. Xorg bug: 3259 Reviewed by: Eric Anholt
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return drm_agp_release(dev);
}
int drm_agp_release(struct drm_device * dev)
Adds support for PCI cards to MGA DRM This patch adds serveral new ioctls and a new query to get_param query to support PCI MGA cards. Two ioctls were added to implement interrupt based waiting. With this change, the client-side driver no longer needs to map the primary DMA region or the MMIO region. Previously, end-of-frame waiting was done by busy waiting in the client-side driver until one of the MMIO registers (the current DMA pointer) matched a pointer to the end of primary DMA space. By using interrupts, the busy waiting and the extra mappings are removed. A third ioctl was added to bootstrap DMA. This ioctl, which is used by the X-server, moves a *LOT* of code from the X-server into the kernel. This allows the kernel to do whatever needs to be done to setup DMA buffers. The entire process and the locations of the buffers are hidden from user-mode. Additionally, a get_param query was added to differentiate between G4x0 cards and G550 cards. A gap was left in the numbering sequence so that, if needed, G450 cards could be distinguished from G400 cards. According to Ville Syrjälä, the G4x0 cards and the G550 cards handle anisotropic filtering differently. This seems the most compatible way to let the client-side driver know which card it's own. Doing this very small change now eliminates the need to bump the DRM minor version twice. http://marc.theaimsgroup.com/?l=dri-devel&m=106625815319773&w=2 A number of ioctl handlers in linux-core were also modified so that they could be called in-kernel. In these cases, the in-kernel callable version kept the existing name (e.g., drm_agp_acquire) and the ioctl handler added _ioctl to the name (e.g., drm_agp_acquire_ioctl). This patch also replaces the drm_agp_do_release function with drm_agp_release. drm_agp_release (drm_core_agp_release in the previous patch) is very similar to drm_agp_do_release, and I saw no reason to have both. This commit *breaks the build* on BSD. Eric said that he would make the required updates to the BSD side soon. Xorg bug: 3259 Reviewed by: Eric Anholt
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{
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if (!dev->agp || !dev->agp->acquired)
return EINVAL;
agp_release(dev->agp->agpdev);
dev->agp->acquired = 0;
return 0;
}
int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode)
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{
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if (!dev->agp || !dev->agp->acquired)
return EINVAL;
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dev->agp->mode = mode.mode;
agp_enable(dev->agp->agpdev, mode.mode);
dev->agp->enabled = 1;
return 0;
}
int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_agp_mode mode;
mode = *(struct drm_agp_mode *) data;
return drm_agp_enable(dev, mode);
}
int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
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{
drm_agp_mem_t *entry;
void *handle;
unsigned long pages;
u_int32_t type;
struct agp_memory_info info;
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if (!dev->agp || !dev->agp->acquired)
return EINVAL;
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entry = malloc(sizeof(*entry), M_DRM, M_NOWAIT | M_ZERO);
if (entry == NULL)
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return ENOMEM;
pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
type = (u_int32_t) request->type;
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DRM_UNLOCK();
handle = drm_agp_allocate_memory(pages, type);
DRM_LOCK();
if (handle == NULL) {
free(entry, M_DRM);
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return ENOMEM;
}
entry->handle = handle;
entry->bound = 0;
entry->pages = pages;
entry->prev = NULL;
entry->next = dev->agp->memory;
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if (dev->agp->memory)
dev->agp->memory->prev = entry;
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dev->agp->memory = entry;
agp_memory_info(dev->agp->agpdev, entry->handle, &info);
request->handle = (unsigned long) entry->handle;
request->physical = info.ami_physical;
return 0;
}
int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_agp_buffer request;
int retcode;
request = *(struct drm_agp_buffer *) data;
DRM_LOCK();
retcode = drm_agp_alloc(dev, &request);
DRM_UNLOCK();
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*(struct drm_agp_buffer *) data = request;
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return retcode;
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}
static drm_agp_mem_t * drm_agp_lookup_entry(struct drm_device *dev,
void *handle)
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{
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 drm_device *dev, struct drm_agp_binding *request)
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{
drm_agp_mem_t *entry;
int retcode;
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if (!dev->agp || !dev->agp->acquired)
return EINVAL;
entry = drm_agp_lookup_entry(dev, (void *)request->handle);
if (entry == NULL || !entry->bound)
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return EINVAL;
DRM_UNLOCK();
retcode = drm_agp_unbind_memory(entry->handle);
DRM_LOCK();
if (retcode == 0)
entry->bound = 0;
return retcode;
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}
int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
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{
struct drm_agp_binding request;
int retcode;
request = *(struct drm_agp_binding *) data;
DRM_LOCK();
retcode = drm_agp_unbind(dev, &request);
DRM_UNLOCK();
return retcode;
}
int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
{
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drm_agp_mem_t *entry;
int retcode;
int page;
if (!dev->agp || !dev->agp->acquired)
return EINVAL;
DRM_DEBUG("agp_bind, page_size=%x\n", PAGE_SIZE);
entry = drm_agp_lookup_entry(dev, (void *)request->handle);
if (entry == NULL || entry->bound)
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return EINVAL;
page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
DRM_UNLOCK();
retcode = drm_agp_bind_memory(entry->handle, page);
DRM_LOCK();
if (retcode == 0)
entry->bound = dev->agp->base + (page << PAGE_SHIFT);
return retcode;
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}
int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
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{
struct drm_agp_binding request;
int retcode;
request = *(struct drm_agp_binding *) data;
DRM_LOCK();
retcode = drm_agp_bind(dev, &request);
DRM_UNLOCK();
return retcode;
}
int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request)
{
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drm_agp_mem_t *entry;
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if (!dev->agp || !dev->agp->acquired)
return EINVAL;
entry = drm_agp_lookup_entry(dev, (void*)request->handle);
if (entry == NULL)
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return EINVAL;
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if (entry->prev)
entry->prev->next = entry->next;
else
dev->agp->memory = entry->next;
if (entry->next)
entry->next->prev = entry->prev;
DRM_UNLOCK();
if (entry->bound)
drm_agp_unbind_memory(entry->handle);
drm_agp_free_memory(entry->handle);
DRM_LOCK();
free(entry, M_DRM);
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return 0;
}
int drm_agp_free_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_agp_buffer request;
int retcode;
request = *(struct drm_agp_buffer *) data;
DRM_LOCK();
retcode = drm_agp_free(dev, &request);
DRM_UNLOCK();
return retcode;
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}
drm_agp_head_t *drm_agp_init(void)
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{
device_t agpdev;
drm_agp_head_t *head = NULL;
int agp_available = 1;
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agpdev = DRM_AGP_FIND_DEVICE();
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if (!agpdev)
agp_available = 0;
DRM_DEBUG("agp_available = %d\n", agp_available);
if (agp_available) {
head = malloc(sizeof(*head), M_DRM, M_NOWAIT | M_ZERO);
if (head == NULL)
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return NULL;
head->agpdev = agpdev;
agp_get_info(agpdev, &head->info);
head->base = head->info.ai_aperture_base;
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head->memory = NULL;
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DRM_INFO("AGP at 0x%08lx %dMB\n",
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(long)head->info.ai_aperture_base,
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(int)(head->info.ai_aperture_size >> 20));
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}
return head;
}
void *drm_agp_allocate_memory(size_t pages, u32 type)
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{
device_t agpdev;
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agpdev = DRM_AGP_FIND_DEVICE();
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if (!agpdev)
return NULL;
return agp_alloc_memory(agpdev, type, pages << AGP_PAGE_SHIFT);
}
int drm_agp_free_memory(void *handle)
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{
device_t agpdev;
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agpdev = DRM_AGP_FIND_DEVICE();
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if (!agpdev || !handle)
return 0;
agp_free_memory(agpdev, handle);
return 1;
}
int drm_agp_bind_memory(void *handle, off_t start)
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{
device_t agpdev;
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agpdev = DRM_AGP_FIND_DEVICE();
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if (!agpdev || !handle)
return EINVAL;
return agp_bind_memory(agpdev, handle, start * PAGE_SIZE);
}
int drm_agp_unbind_memory(void *handle)
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{
device_t agpdev;
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agpdev = DRM_AGP_FIND_DEVICE();
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if (!agpdev || !handle)
return EINVAL;
return agp_unbind_memory(agpdev, handle);
}