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drm/bsd/mga/mga_bufs.c

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/* mga_bufs.c -- IOCTLs to manage buffers
* Created: Thu Jan 6 01:47:26 2000 by jhartmann@precisioninsight.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
* 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.
*
* Authors: Rickard E. (Rik) Faith <faith@valinux.com>
* Jeff Hartmann <jhartmann@valinux.com>
*
*
*/
#define __NO_VERSION__
#include "drmP.h"
#include "mga_drv.h"
#include <sys/mman.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
#include <vm/vm_map.h>
static int
mga_addbufs_agp(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
{
drm_device_t *dev = kdev->si_drv1;
drm_device_dma_t *dma = dev->dma;
drm_buf_desc_t request;
drm_buf_entry_t *entry;
drm_buf_t *buf;
unsigned long offset;
unsigned long agp_offset;
int count;
int order;
int size;
int alignment;
int page_order;
int total;
int byte_count;
int i;
if (!dma) return EINVAL;
request = *(drm_buf_desc_t *) data;
count = request.count;
order = drm_order(request.size);
size = 1 << order;
agp_offset = request.agp_start;
alignment = (request.flags & _DRM_PAGE_ALIGN) ? round_page(size) :size;
page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
total = PAGE_SIZE << page_order;
byte_count = 0;
DRM_DEBUG("count: %d\n", count);
DRM_DEBUG("order: %d\n", order);
DRM_DEBUG("size: %d\n", size);
DRM_DEBUG("agp_offset: %ld\n", agp_offset);
DRM_DEBUG("alignment: %d\n", alignment);
DRM_DEBUG("page_order: %d\n", page_order);
DRM_DEBUG("total: %d\n", total);
DRM_DEBUG("byte_count: %d\n", byte_count);
if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return EINVAL;
if (dev->queue_count) return EBUSY; /* Not while in use */
simple_lock(&dev->count_lock);
if (dev->buf_use) {
simple_unlock(&dev->count_lock);
return EBUSY;
}
atomic_inc(&dev->buf_alloc);
simple_unlock(&dev->count_lock);
lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, curproc);
entry = &dma->bufs[order];
if (entry->buf_count) {
lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc);
atomic_dec(&dev->buf_alloc);
return ENOMEM; /* May only call once for each order */
}
entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
DRM_MEM_BUFS);
if (!entry->buflist) {
lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc);
atomic_dec(&dev->buf_alloc);
return ENOMEM;
}
memset(entry->buflist, 0, count * sizeof(*entry->buflist));
entry->buf_size = size;
entry->page_order = page_order;
offset = 0;
while(entry->buf_count < count) {
buf = &entry->buflist[entry->buf_count];
buf->idx = dma->buf_count + entry->buf_count;
buf->total = alignment;
buf->order = order;
buf->used = 0;
DRM_DEBUG("offset : %ld\n", offset);
buf->offset = offset; /* Hrm */
buf->bus_address = dev->agp->base + agp_offset + offset;
buf->address = (void *)(agp_offset + offset + dev->agp->base);
buf->next = NULL;
buf->waiting = 0;
buf->pending = 0;
buf->dma_wait = 0;
buf->pid = 0;
buf->dev_private = drm_alloc(sizeof(drm_mga_buf_priv_t), DRM_MEM_BUFS);
buf->dev_priv_size = sizeof(drm_mga_buf_priv_t);
#if DRM_DMA_HISTOGRAM
timespecclear(&buf->time_queued);
timespecclear(&buf->time_dispatched);
timespecclear(&buf->time_completed);
timespecclear(&buf->time_freed);
#endif
offset = offset + alignment;
entry->buf_count++;
byte_count += PAGE_SIZE << page_order;
DRM_DEBUG("buffer %d @ %p\n",
entry->buf_count, buf->address);
}
dma->buflist = drm_realloc(dma->buflist,
dma->buf_count * sizeof(*dma->buflist),
(dma->buf_count + entry->buf_count)
* sizeof(*dma->buflist),
DRM_MEM_BUFS);
for (i = dma->buf_count; i < dma->buf_count + entry->buf_count; i++)
dma->buflist[i] = &entry->buflist[i - dma->buf_count];
dma->buf_count += entry->buf_count;
DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
dma->byte_count += byte_count;
DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
drm_freelist_create(&entry->freelist, entry->buf_count);
for (i = 0; i < entry->buf_count; i++) {
drm_freelist_put(dev, &entry->freelist, &entry->buflist[i]);
}
lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc);
request.count = entry->buf_count;
request.size = size;
*(drm_buf_desc_t *) data = request;
atomic_dec(&dev->buf_alloc);
DRM_DEBUG("count: %d\n", count);
DRM_DEBUG("order: %d\n", order);
DRM_DEBUG("size: %d\n", size);
DRM_DEBUG("agp_offset: %ld\n", agp_offset);
DRM_DEBUG("alignment: %d\n", alignment);
DRM_DEBUG("page_order: %d\n", page_order);
DRM_DEBUG("total: %d\n", total);
DRM_DEBUG("byte_count: %d\n", byte_count);
dma->flags = _DRM_DMA_USE_AGP;
DRM_DEBUG("dma->flags : %x\n", dma->flags);
return 0;
}
static int
mga_addbufs_pci(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
{
drm_device_t *dev = kdev->si_drv1;
drm_device_dma_t *dma = dev->dma;
drm_buf_desc_t request;
int count;
int order;
int size;
int total;
int page_order;
drm_buf_entry_t *entry;
unsigned long page;
drm_buf_t *buf;
int alignment;
unsigned long offset;
int i;
int byte_count;
int page_count;
if (!dma) return EINVAL;
request = *(drm_buf_desc_t *) data;
count = request.count;
order = drm_order(request.size);
size = 1 << order;
DRM_DEBUG("count = %d, size = %d (%d), order = %d, queue_count = %d\n",
request.count, request.size, size, order, dev->queue_count);
if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return EINVAL;
if (dev->queue_count) return EBUSY; /* Not while in use */
alignment = (request.flags & _DRM_PAGE_ALIGN) ? round_page(size) :size;
page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
total = PAGE_SIZE << page_order;
simple_lock(&dev->count_lock);
if (dev->buf_use) {
simple_unlock(&dev->count_lock);
return EBUSY;
}
atomic_inc(&dev->buf_alloc);
simple_unlock(&dev->count_lock);
lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, curproc);
entry = &dma->bufs[order];
if (entry->buf_count) {
lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc);
atomic_dec(&dev->buf_alloc);
return ENOMEM; /* May only call once for each order */
}
entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
DRM_MEM_BUFS);
if (!entry->buflist) {
lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc);
atomic_dec(&dev->buf_alloc);
return ENOMEM;
}
memset(entry->buflist, 0, count * sizeof(*entry->buflist));
entry->seglist = drm_alloc(count * sizeof(*entry->seglist),
DRM_MEM_SEGS);
if (!entry->seglist) {
drm_free(entry->buflist,
count * sizeof(*entry->buflist),
DRM_MEM_BUFS);
lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc);
atomic_dec(&dev->buf_alloc);
return ENOMEM;
}
memset(entry->seglist, 0, count * sizeof(*entry->seglist));
dma->pagelist = drm_realloc(dma->pagelist,
dma->page_count * sizeof(*dma->pagelist),
(dma->page_count + (count << page_order))
* sizeof(*dma->pagelist),
DRM_MEM_PAGES);
DRM_DEBUG("pagelist: %d entries\n",
dma->page_count + (count << page_order));
entry->buf_size = size;
entry->page_order = page_order;
byte_count = 0;
page_count = 0;
while (entry->buf_count < count) {
if (!(page = drm_alloc_pages(page_order, DRM_MEM_DMA))) break;
entry->seglist[entry->seg_count++] = page;
for (i = 0; i < (1 << page_order); i++) {
DRM_DEBUG("page %d @ 0x%08lx\n",
dma->page_count + page_count,
page + PAGE_SIZE * i);
dma->pagelist[dma->page_count + page_count++]
= page + PAGE_SIZE * i;
}
for (offset = 0;
offset + size <= total && entry->buf_count < count;
offset += alignment, ++entry->buf_count) {
buf = &entry->buflist[entry->buf_count];
buf->idx = dma->buf_count + entry->buf_count;
buf->total = alignment;
buf->order = order;
buf->used = 0;
buf->offset = (dma->byte_count + byte_count + offset);
buf->address = (void *)(page + offset);
buf->next = NULL;
buf->waiting = 0;
buf->pending = 0;
buf->dma_wait = 0;
buf->pid = 0;
#if DRM_DMA_HISTOGRAM
timespecclear(&buf->time_queued);
timespecclear(&buf->time_dispatched);
timespecclear(&buf->time_completed);
timespecclear(&buf->time_freed);
#endif
DRM_DEBUG("buffer %d @ %p\n",
entry->buf_count, buf->address);
}
byte_count += PAGE_SIZE << page_order;
}
dma->buflist = drm_realloc(dma->buflist,
dma->buf_count * sizeof(*dma->buflist),
(dma->buf_count + entry->buf_count)
* sizeof(*dma->buflist),
DRM_MEM_BUFS);
for (i = dma->buf_count; i < dma->buf_count + entry->buf_count; i++)
dma->buflist[i] = &entry->buflist[i - dma->buf_count];
dma->buf_count += entry->buf_count;
dma->seg_count += entry->seg_count;
dma->page_count += entry->seg_count << page_order;
dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
drm_freelist_create(&entry->freelist, entry->buf_count);
for (i = 0; i < entry->buf_count; i++) {
drm_freelist_put(dev, &entry->freelist, &entry->buflist[i]);
}
lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc);
request.count = entry->buf_count;
request.size = size;
*(drm_buf_desc_t *) data = request;
atomic_dec(&dev->buf_alloc);
return 0;
}
int
mga_addbufs(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
{
drm_buf_desc_t request;
request = *(drm_buf_desc_t *) data;
if(request.flags & _DRM_AGP_BUFFER)
return mga_addbufs_agp(kdev, cmd, data, flags, p);
else
return mga_addbufs_pci(kdev, cmd, data, flags, p);
}
int
mga_infobufs(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
{
drm_device_t *dev = kdev->si_drv1;
drm_device_dma_t *dma = dev->dma;
drm_buf_info_t request;
int i;
int count;
int error;
if (!dma) return EINVAL;
simple_lock(&dev->count_lock);
if (atomic_read(&dev->buf_alloc)) {
simple_unlock(&dev->count_lock);
return EBUSY;
}
++dev->buf_use; /* Can't allocate more after this call */
simple_unlock(&dev->count_lock);
request = *(drm_buf_info_t *) data;
for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
if (dma->bufs[i].buf_count) ++count;
}
DRM_DEBUG("count = %d\n", count);
if (request.count >= count) {
for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
if (dma->bufs[i].buf_count) {
error = copyout(&dma->bufs[i].buf_count,
&request.list[count].count,
sizeof(dma->bufs[0]
.buf_count));
if (error) return error;
error = copyout(&dma->bufs[i].buf_size,
&request.list[count].size,
sizeof(dma->bufs[0]
.buf_size));
if (error) return error;
error = copyout(&dma->bufs[i]
.freelist.low_mark,
&request.list[count].low_mark,
sizeof(dma->bufs[0]
.freelist.low_mark));
if (error) return error;
error = copyout(&dma->bufs[i]
.freelist.high_mark,
&request.list[count].high_mark,
sizeof(dma->bufs[0]
.freelist.high_mark));
if (error) return error;
DRM_DEBUG("%d %d %d %d %d\n",
i,
dma->bufs[i].buf_count,
dma->bufs[i].buf_size,
dma->bufs[i].freelist.low_mark,
dma->bufs[i].freelist.high_mark);
++count;
}
}
}
request.count = count;
*(drm_buf_info_t *) data = request;
return 0;
}
int
mga_markbufs(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
{
drm_device_t *dev = kdev->si_drv1;
drm_device_dma_t *dma = dev->dma;
drm_buf_desc_t request;
int order;
drm_buf_entry_t *entry;
if (!dma) return EINVAL;
request = *(drm_buf_desc_t *) data;
DRM_DEBUG("%d, %d, %d\n",
request.size, request.low_mark, request.high_mark);
order = drm_order(request.size);
if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return EINVAL;
entry = &dma->bufs[order];
if (request.low_mark < 0 || request.low_mark > entry->buf_count)
return EINVAL;
if (request.high_mark < 0 || request.high_mark > entry->buf_count)
return EINVAL;
entry->freelist.low_mark = request.low_mark;
entry->freelist.high_mark = request.high_mark;
return 0;
}
int
mga_freebufs(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
{
drm_device_t *dev = kdev->si_drv1;
drm_device_dma_t *dma = dev->dma;
drm_buf_free_t request;
int i;
int error;
int idx;
drm_buf_t *buf;
if (!dma) return EINVAL;
request = *(drm_buf_free_t *) data;
DRM_DEBUG("%d\n", request.count);
for (i = 0; i < request.count; i++) {
error = copyin(&request.list[i],
&idx,
sizeof(idx));
if (error) return error;
if (idx < 0 || idx >= dma->buf_count) {
DRM_ERROR("Index %d (of %d max)\n",
idx, dma->buf_count - 1);
return EINVAL;
}
buf = dma->buflist[idx];
if (buf->pid != p->p_pid) {
DRM_ERROR("Process %d freeing buffer owned by %d\n",
p->p_pid, buf->pid);
return EINVAL;
}
drm_free_buffer(dev, buf);
}
return 0;
}
int
mga_mapbufs(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
{
drm_device_t *dev = kdev->si_drv1;
drm_device_dma_t *dma = dev->dma;
int retcode = 0;
const int zero = 0;
vm_offset_t virtual;
vm_offset_t address;
drm_buf_map_t request;
int i;
if (!dma) return EINVAL;
DRM_DEBUG("\n");
simple_lock(&dev->count_lock);
if (atomic_read(&dev->buf_alloc)) {
simple_unlock(&dev->count_lock);
DRM_DEBUG("Busy\n");
return EBUSY;
}
++dev->buf_use; /* Can't allocate more after this call */
simple_unlock(&dev->count_lock);
request = *(drm_buf_map_t *) data;
DRM_DEBUG("mga_mapbufs\n");
DRM_DEBUG("dma->flags : %x\n", dma->flags);
if (request.count >= dma->buf_count) {
if(dma->flags & _DRM_DMA_USE_AGP) {
drm_mga_private_t *dev_priv = dev->dev_private;
drm_map_t *map = NULL;
map = dev->maplist[dev_priv->buffer_map_idx];
if (!map) {
DRM_DEBUG("map is null\n");
retcode = EINVAL;
goto done;
}
DRM_DEBUG("map->offset : %lx\n", map->offset);
DRM_DEBUG("map->size : %lx\n", map->size);
DRM_DEBUG("map->type : %d\n", map->type);
DRM_DEBUG("map->flags : %x\n", map->flags);
DRM_DEBUG("map->handle : %p\n", map->handle);
DRM_DEBUG("map->mtrr : %d\n", map->mtrr);
virtual = 0;
retcode = vm_mmap(&p->p_vmspace->vm_map,
&virtual,
map->size,
PROT_READ|PROT_WRITE, VM_PROT_ALL,
MAP_SHARED,
SLIST_FIRST(&kdev->si_hlist),
map->offset);
} else {
virtual = 0;
retcode = vm_mmap(&p->p_vmspace->vm_map,
&virtual,
round_page(dma->byte_count),
PROT_READ|PROT_WRITE, VM_PROT_ALL,
MAP_SHARED,
SLIST_FIRST(&kdev->si_hlist),
0);
}
if (retcode) {
/* Real error */
DRM_DEBUG("mmap error\n");
goto done;
}
request.virtual = (void *)virtual;
for (i = 0; i < dma->buf_count; i++) {
retcode = copyout(&dma->buflist[i]->idx,
&request.list[i].idx,
sizeof(request.list[0].idx));
if (retcode) goto done;
retcode = copyout(&dma->buflist[i]->total,
&request.list[i].total,
sizeof(request.list[0].total));
if (retcode) goto done;
retcode = copyout(&zero,
&request.list[i].used,
sizeof(request.list[0].used));
if (retcode) goto done;
address = virtual + dma->buflist[i]->offset;
retcode = copyout(&address,
&request.list[i].address,
sizeof(address));
if (retcode) goto done;
}
}
done:
request.count = dma->buf_count;
DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode);
*(drm_buf_map_t *) data = request;
DRM_DEBUG("retcode : %d\n", retcode);
return retcode;
}
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