mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
9c03c0d88c
* On 32 bit platforms we steal the upper 4 bits of the map handle to store a unique map id. * On 64 bit platforms we steal the upper 24 bits. Resolves issues where the offsets that are handed to mmap may overlap the VRAM on some cards. Tested on: radeon, intel, mga, and via. This will break nouveau. I will spin new patches shortly.
313 lines
7.3 KiB
C
313 lines
7.3 KiB
C
/*-
|
|
* Copyright 1999, 2000 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.
|
|
*
|
|
* Authors:
|
|
* Rickard E. (Rik) Faith <faith@valinux.com>
|
|
* Gareth Hughes <gareth@valinux.com>
|
|
*
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/** @file drm_context.c
|
|
* Implementation of the context management ioctls.
|
|
*/
|
|
|
|
#include "dev/drm/drmP.h"
|
|
|
|
/* ================================================================
|
|
* Context bitmap support
|
|
*/
|
|
|
|
void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle)
|
|
{
|
|
if (ctx_handle < 0 || ctx_handle >= DRM_MAX_CTXBITMAP ||
|
|
dev->ctx_bitmap == NULL) {
|
|
DRM_ERROR("Attempt to free invalid context handle: %d\n",
|
|
ctx_handle);
|
|
return;
|
|
}
|
|
|
|
DRM_LOCK();
|
|
clear_bit(ctx_handle, dev->ctx_bitmap);
|
|
dev->context_sareas[ctx_handle] = NULL;
|
|
DRM_UNLOCK();
|
|
return;
|
|
}
|
|
|
|
int drm_ctxbitmap_next(struct drm_device *dev)
|
|
{
|
|
int bit;
|
|
|
|
if (dev->ctx_bitmap == NULL)
|
|
return -1;
|
|
|
|
DRM_LOCK();
|
|
bit = find_first_zero_bit(dev->ctx_bitmap, DRM_MAX_CTXBITMAP);
|
|
if (bit >= DRM_MAX_CTXBITMAP) {
|
|
DRM_UNLOCK();
|
|
return -1;
|
|
}
|
|
|
|
set_bit(bit, dev->ctx_bitmap);
|
|
DRM_DEBUG("bit : %d\n", bit);
|
|
if ((bit+1) > dev->max_context) {
|
|
drm_local_map_t **ctx_sareas;
|
|
int max_ctx = (bit+1);
|
|
|
|
ctx_sareas = realloc(dev->context_sareas,
|
|
max_ctx * sizeof(*dev->context_sareas),
|
|
DRM_MEM_SAREA, M_NOWAIT);
|
|
if (ctx_sareas == NULL) {
|
|
clear_bit(bit, dev->ctx_bitmap);
|
|
DRM_DEBUG("failed to allocate bit : %d\n", bit);
|
|
DRM_UNLOCK();
|
|
return -1;
|
|
}
|
|
dev->max_context = max_ctx;
|
|
dev->context_sareas = ctx_sareas;
|
|
dev->context_sareas[bit] = NULL;
|
|
}
|
|
DRM_UNLOCK();
|
|
return bit;
|
|
}
|
|
|
|
int drm_ctxbitmap_init(struct drm_device *dev)
|
|
{
|
|
int i;
|
|
int temp;
|
|
|
|
DRM_LOCK();
|
|
dev->ctx_bitmap = malloc(PAGE_SIZE, DRM_MEM_CTXBITMAP,
|
|
M_NOWAIT | M_ZERO);
|
|
if (dev->ctx_bitmap == NULL) {
|
|
DRM_UNLOCK();
|
|
return ENOMEM;
|
|
}
|
|
dev->context_sareas = NULL;
|
|
dev->max_context = -1;
|
|
DRM_UNLOCK();
|
|
|
|
for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
|
|
temp = drm_ctxbitmap_next(dev);
|
|
DRM_DEBUG("drm_ctxbitmap_init : %d\n", temp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void drm_ctxbitmap_cleanup(struct drm_device *dev)
|
|
{
|
|
DRM_LOCK();
|
|
if (dev->context_sareas != NULL)
|
|
free(dev->context_sareas, DRM_MEM_SAREA);
|
|
free(dev->ctx_bitmap, DRM_MEM_CTXBITMAP);
|
|
DRM_UNLOCK();
|
|
}
|
|
|
|
/* ================================================================
|
|
* Per Context SAREA Support
|
|
*/
|
|
|
|
int drm_getsareactx(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_ctx_priv_map *request = data;
|
|
drm_local_map_t *map;
|
|
|
|
DRM_LOCK();
|
|
if (dev->max_context < 0 ||
|
|
request->ctx_id >= (unsigned) dev->max_context) {
|
|
DRM_UNLOCK();
|
|
return EINVAL;
|
|
}
|
|
|
|
map = dev->context_sareas[request->ctx_id];
|
|
DRM_UNLOCK();
|
|
|
|
request->handle = (void *)map->handle;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int drm_setsareactx(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_ctx_priv_map *request = data;
|
|
drm_local_map_t *map = NULL;
|
|
|
|
DRM_LOCK();
|
|
TAILQ_FOREACH(map, &dev->maplist, link) {
|
|
if (map->handle == request->handle) {
|
|
if (dev->max_context < 0)
|
|
goto bad;
|
|
if (request->ctx_id >= (unsigned) dev->max_context)
|
|
goto bad;
|
|
dev->context_sareas[request->ctx_id] = map;
|
|
DRM_UNLOCK();
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
bad:
|
|
DRM_UNLOCK();
|
|
return EINVAL;
|
|
}
|
|
|
|
/* ================================================================
|
|
* The actual DRM context handling routines
|
|
*/
|
|
|
|
int drm_context_switch(struct drm_device *dev, int old, int new)
|
|
{
|
|
if (test_and_set_bit(0, &dev->context_flag)) {
|
|
DRM_ERROR("Reentering -- FIXME\n");
|
|
return EBUSY;
|
|
}
|
|
|
|
DRM_DEBUG("Context switch from %d to %d\n", old, new);
|
|
|
|
if (new == dev->last_context) {
|
|
clear_bit(0, &dev->context_flag);
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int drm_context_switch_complete(struct drm_device *dev, int new)
|
|
{
|
|
dev->last_context = new; /* PRE/POST: This is the _only_ writer. */
|
|
|
|
if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
|
|
DRM_ERROR("Lock isn't held after context switch\n");
|
|
}
|
|
|
|
/* If a context switch is ever initiated
|
|
when the kernel holds the lock, release
|
|
that lock here. */
|
|
clear_bit(0, &dev->context_flag);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int drm_resctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
|
|
{
|
|
struct drm_ctx_res *res = data;
|
|
struct drm_ctx ctx;
|
|
int i;
|
|
|
|
if (res->count >= DRM_RESERVED_CONTEXTS) {
|
|
bzero(&ctx, sizeof(ctx));
|
|
for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
|
|
ctx.handle = i;
|
|
if (DRM_COPY_TO_USER(&res->contexts[i],
|
|
&ctx, sizeof(ctx)))
|
|
return EFAULT;
|
|
}
|
|
}
|
|
res->count = DRM_RESERVED_CONTEXTS;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int drm_addctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
|
|
{
|
|
struct drm_ctx *ctx = data;
|
|
|
|
ctx->handle = drm_ctxbitmap_next(dev);
|
|
if (ctx->handle == DRM_KERNEL_CONTEXT) {
|
|
/* Skip kernel's context and get a new one. */
|
|
ctx->handle = drm_ctxbitmap_next(dev);
|
|
}
|
|
DRM_DEBUG("%d\n", ctx->handle);
|
|
if (ctx->handle == -1) {
|
|
DRM_DEBUG("Not enough free contexts.\n");
|
|
/* Should this return -EBUSY instead? */
|
|
return ENOMEM;
|
|
}
|
|
|
|
if (dev->driver->context_ctor && ctx->handle != DRM_KERNEL_CONTEXT) {
|
|
DRM_LOCK();
|
|
dev->driver->context_ctor(dev, ctx->handle);
|
|
DRM_UNLOCK();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int drm_modctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
|
|
{
|
|
/* This does nothing */
|
|
return 0;
|
|
}
|
|
|
|
int drm_getctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
|
|
{
|
|
struct drm_ctx *ctx = data;
|
|
|
|
/* This is 0, because we don't handle any context flags */
|
|
ctx->flags = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int drm_switchctx(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_ctx *ctx = data;
|
|
|
|
DRM_DEBUG("%d\n", ctx->handle);
|
|
return drm_context_switch(dev, dev->last_context, ctx->handle);
|
|
}
|
|
|
|
int drm_newctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
|
|
{
|
|
struct drm_ctx *ctx = data;
|
|
|
|
DRM_DEBUG("%d\n", ctx->handle);
|
|
drm_context_switch_complete(dev, ctx->handle);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int drm_rmctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
|
|
{
|
|
struct drm_ctx *ctx = data;
|
|
|
|
DRM_DEBUG("%d\n", ctx->handle);
|
|
if (ctx->handle != DRM_KERNEL_CONTEXT) {
|
|
if (dev->driver->context_dtor) {
|
|
DRM_LOCK();
|
|
dev->driver->context_dtor(dev, ctx->handle);
|
|
DRM_UNLOCK();
|
|
}
|
|
|
|
drm_ctxbitmap_free(dev, ctx->handle);
|
|
}
|
|
|
|
return 0;
|
|
}
|