1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
946 lines
24 KiB
C
946 lines
24 KiB
C
/* gamma_dma.c -- DMA support for GMX 2000 -*- linux-c -*-
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* Created: Fri Mar 19 14:30:16 1999 by faith@precisioninsight.com
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*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Rickard E. (Rik) Faith <faith@valinux.com>
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*
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*/
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#include "gamma.h"
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#include "drmP.h"
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#include "drm.h"
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#include "gamma_drm.h"
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#include "gamma_drv.h"
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#include <linux/interrupt.h> /* For task queue support */
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#include <linux/delay.h>
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static inline void gamma_dma_dispatch(drm_device_t *dev, unsigned long address,
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unsigned long length)
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{
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drm_gamma_private_t *dev_priv =
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(drm_gamma_private_t *)dev->dev_private;
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mb();
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while ( GAMMA_READ(GAMMA_INFIFOSPACE) < 2)
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cpu_relax();
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GAMMA_WRITE(GAMMA_DMAADDRESS, address);
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while (GAMMA_READ(GAMMA_GCOMMANDSTATUS) != 4)
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cpu_relax();
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GAMMA_WRITE(GAMMA_DMACOUNT, length / 4);
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}
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void gamma_dma_quiescent_single(drm_device_t *dev)
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{
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drm_gamma_private_t *dev_priv =
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(drm_gamma_private_t *)dev->dev_private;
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while (GAMMA_READ(GAMMA_DMACOUNT))
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cpu_relax();
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while (GAMMA_READ(GAMMA_INFIFOSPACE) < 2)
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cpu_relax();
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GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
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GAMMA_WRITE(GAMMA_SYNC, 0);
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do {
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while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
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cpu_relax();
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} while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG);
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}
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void gamma_dma_quiescent_dual(drm_device_t *dev)
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{
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drm_gamma_private_t *dev_priv =
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(drm_gamma_private_t *)dev->dev_private;
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while (GAMMA_READ(GAMMA_DMACOUNT))
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cpu_relax();
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while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
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cpu_relax();
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GAMMA_WRITE(GAMMA_BROADCASTMASK, 3);
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GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
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GAMMA_WRITE(GAMMA_SYNC, 0);
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/* Read from first MX */
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do {
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while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
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cpu_relax();
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} while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG);
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/* Read from second MX */
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do {
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while (!GAMMA_READ(GAMMA_OUTFIFOWORDS + 0x10000))
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cpu_relax();
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} while (GAMMA_READ(GAMMA_OUTPUTFIFO + 0x10000) != GAMMA_SYNC_TAG);
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}
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void gamma_dma_ready(drm_device_t *dev)
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{
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drm_gamma_private_t *dev_priv =
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(drm_gamma_private_t *)dev->dev_private;
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while (GAMMA_READ(GAMMA_DMACOUNT))
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cpu_relax();
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}
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static inline int gamma_dma_is_ready(drm_device_t *dev)
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{
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drm_gamma_private_t *dev_priv =
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(drm_gamma_private_t *)dev->dev_private;
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return (!GAMMA_READ(GAMMA_DMACOUNT));
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}
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irqreturn_t gamma_driver_irq_handler( DRM_IRQ_ARGS )
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{
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drm_device_t *dev = (drm_device_t *)arg;
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drm_device_dma_t *dma = dev->dma;
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drm_gamma_private_t *dev_priv =
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(drm_gamma_private_t *)dev->dev_private;
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/* FIXME: should check whether we're actually interested in the interrupt? */
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atomic_inc(&dev->counts[6]); /* _DRM_STAT_IRQ */
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while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
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cpu_relax();
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GAMMA_WRITE(GAMMA_GDELAYTIMER, 0xc350/2); /* 0x05S */
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GAMMA_WRITE(GAMMA_GCOMMANDINTFLAGS, 8);
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GAMMA_WRITE(GAMMA_GINTFLAGS, 0x2001);
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if (gamma_dma_is_ready(dev)) {
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/* Free previous buffer */
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if (test_and_set_bit(0, &dev->dma_flag))
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return IRQ_HANDLED;
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if (dma->this_buffer) {
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gamma_free_buffer(dev, dma->this_buffer);
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dma->this_buffer = NULL;
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}
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clear_bit(0, &dev->dma_flag);
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/* Dispatch new buffer */
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schedule_work(&dev->work);
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}
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return IRQ_HANDLED;
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}
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/* Only called by gamma_dma_schedule. */
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static int gamma_do_dma(drm_device_t *dev, int locked)
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{
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unsigned long address;
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unsigned long length;
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drm_buf_t *buf;
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int retcode = 0;
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drm_device_dma_t *dma = dev->dma;
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if (test_and_set_bit(0, &dev->dma_flag)) return -EBUSY;
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if (!dma->next_buffer) {
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DRM_ERROR("No next_buffer\n");
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clear_bit(0, &dev->dma_flag);
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return -EINVAL;
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}
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buf = dma->next_buffer;
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/* WE NOW ARE ON LOGICAL PAGES!! - using page table setup in dma_init */
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/* So we pass the buffer index value into the physical page offset */
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address = buf->idx << 12;
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length = buf->used;
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DRM_DEBUG("context %d, buffer %d (%ld bytes)\n",
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buf->context, buf->idx, length);
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if (buf->list == DRM_LIST_RECLAIM) {
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gamma_clear_next_buffer(dev);
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gamma_free_buffer(dev, buf);
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clear_bit(0, &dev->dma_flag);
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return -EINVAL;
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}
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if (!length) {
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DRM_ERROR("0 length buffer\n");
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gamma_clear_next_buffer(dev);
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gamma_free_buffer(dev, buf);
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clear_bit(0, &dev->dma_flag);
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return 0;
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}
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if (!gamma_dma_is_ready(dev)) {
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clear_bit(0, &dev->dma_flag);
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return -EBUSY;
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}
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if (buf->while_locked) {
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if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
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DRM_ERROR("Dispatching buffer %d from pid %d"
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" \"while locked\", but no lock held\n",
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buf->idx, current->pid);
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}
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} else {
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if (!locked && !gamma_lock_take(&dev->lock.hw_lock->lock,
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DRM_KERNEL_CONTEXT)) {
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clear_bit(0, &dev->dma_flag);
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return -EBUSY;
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}
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}
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if (dev->last_context != buf->context
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&& !(dev->queuelist[buf->context]->flags
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& _DRM_CONTEXT_PRESERVED)) {
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/* PRE: dev->last_context != buf->context */
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if (DRM(context_switch)(dev, dev->last_context,
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buf->context)) {
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DRM(clear_next_buffer)(dev);
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DRM(free_buffer)(dev, buf);
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}
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retcode = -EBUSY;
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goto cleanup;
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/* POST: we will wait for the context
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switch and will dispatch on a later call
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when dev->last_context == buf->context.
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NOTE WE HOLD THE LOCK THROUGHOUT THIS
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TIME! */
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}
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gamma_clear_next_buffer(dev);
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buf->pending = 1;
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buf->waiting = 0;
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buf->list = DRM_LIST_PEND;
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/* WE NOW ARE ON LOGICAL PAGES!!! - overriding address */
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address = buf->idx << 12;
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gamma_dma_dispatch(dev, address, length);
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gamma_free_buffer(dev, dma->this_buffer);
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dma->this_buffer = buf;
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atomic_inc(&dev->counts[7]); /* _DRM_STAT_DMA */
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atomic_add(length, &dev->counts[8]); /* _DRM_STAT_PRIMARY */
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if (!buf->while_locked && !dev->context_flag && !locked) {
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if (gamma_lock_free(dev, &dev->lock.hw_lock->lock,
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DRM_KERNEL_CONTEXT)) {
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DRM_ERROR("\n");
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}
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}
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cleanup:
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clear_bit(0, &dev->dma_flag);
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return retcode;
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}
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static void gamma_dma_timer_bh(unsigned long dev)
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{
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gamma_dma_schedule((drm_device_t *)dev, 0);
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}
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void gamma_irq_immediate_bh(void *dev)
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{
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gamma_dma_schedule(dev, 0);
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}
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int gamma_dma_schedule(drm_device_t *dev, int locked)
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{
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int next;
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drm_queue_t *q;
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drm_buf_t *buf;
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int retcode = 0;
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int processed = 0;
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int missed;
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int expire = 20;
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drm_device_dma_t *dma = dev->dma;
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if (test_and_set_bit(0, &dev->interrupt_flag)) {
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/* Not reentrant */
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atomic_inc(&dev->counts[10]); /* _DRM_STAT_MISSED */
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return -EBUSY;
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}
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missed = atomic_read(&dev->counts[10]);
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again:
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if (dev->context_flag) {
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clear_bit(0, &dev->interrupt_flag);
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return -EBUSY;
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}
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if (dma->next_buffer) {
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/* Unsent buffer that was previously
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selected, but that couldn't be sent
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because the lock could not be obtained
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or the DMA engine wasn't ready. Try
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again. */
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if (!(retcode = gamma_do_dma(dev, locked))) ++processed;
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} else {
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do {
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next = gamma_select_queue(dev, gamma_dma_timer_bh);
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if (next >= 0) {
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q = dev->queuelist[next];
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buf = gamma_waitlist_get(&q->waitlist);
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dma->next_buffer = buf;
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dma->next_queue = q;
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if (buf && buf->list == DRM_LIST_RECLAIM) {
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gamma_clear_next_buffer(dev);
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gamma_free_buffer(dev, buf);
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}
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}
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} while (next >= 0 && !dma->next_buffer);
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if (dma->next_buffer) {
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if (!(retcode = gamma_do_dma(dev, locked))) {
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++processed;
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}
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}
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}
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if (--expire) {
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if (missed != atomic_read(&dev->counts[10])) {
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if (gamma_dma_is_ready(dev)) goto again;
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}
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if (processed && gamma_dma_is_ready(dev)) {
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processed = 0;
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goto again;
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}
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}
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clear_bit(0, &dev->interrupt_flag);
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return retcode;
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}
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static int gamma_dma_priority(struct file *filp,
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drm_device_t *dev, drm_dma_t *d)
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{
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unsigned long address;
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unsigned long length;
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int must_free = 0;
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int retcode = 0;
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int i;
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int idx;
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drm_buf_t *buf;
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drm_buf_t *last_buf = NULL;
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drm_device_dma_t *dma = dev->dma;
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int *send_indices = NULL;
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int *send_sizes = NULL;
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DECLARE_WAITQUEUE(entry, current);
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/* Turn off interrupt handling */
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while (test_and_set_bit(0, &dev->interrupt_flag)) {
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schedule();
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if (signal_pending(current)) return -EINTR;
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}
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if (!(d->flags & _DRM_DMA_WHILE_LOCKED)) {
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while (!gamma_lock_take(&dev->lock.hw_lock->lock,
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DRM_KERNEL_CONTEXT)) {
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schedule();
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if (signal_pending(current)) {
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clear_bit(0, &dev->interrupt_flag);
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return -EINTR;
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}
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}
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++must_free;
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}
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send_indices = DRM(alloc)(d->send_count * sizeof(*send_indices),
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DRM_MEM_DRIVER);
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if (send_indices == NULL)
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return -ENOMEM;
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if (copy_from_user(send_indices, d->send_indices,
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d->send_count * sizeof(*send_indices))) {
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retcode = -EFAULT;
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goto cleanup;
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}
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send_sizes = DRM(alloc)(d->send_count * sizeof(*send_sizes),
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DRM_MEM_DRIVER);
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if (send_sizes == NULL)
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return -ENOMEM;
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if (copy_from_user(send_sizes, d->send_sizes,
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d->send_count * sizeof(*send_sizes))) {
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retcode = -EFAULT;
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goto cleanup;
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}
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for (i = 0; i < d->send_count; i++) {
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idx = send_indices[i];
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if (idx < 0 || idx >= dma->buf_count) {
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DRM_ERROR("Index %d (of %d max)\n",
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send_indices[i], dma->buf_count - 1);
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continue;
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}
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buf = dma->buflist[ idx ];
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if (buf->filp != filp) {
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DRM_ERROR("Process %d using buffer not owned\n",
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current->pid);
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retcode = -EINVAL;
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goto cleanup;
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}
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if (buf->list != DRM_LIST_NONE) {
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DRM_ERROR("Process %d using buffer on list %d\n",
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current->pid, buf->list);
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retcode = -EINVAL;
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goto cleanup;
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}
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/* This isn't a race condition on
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buf->list, since our concern is the
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buffer reclaim during the time the
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process closes the /dev/drm? handle, so
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it can't also be doing DMA. */
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buf->list = DRM_LIST_PRIO;
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buf->used = send_sizes[i];
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buf->context = d->context;
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buf->while_locked = d->flags & _DRM_DMA_WHILE_LOCKED;
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address = (unsigned long)buf->address;
|
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length = buf->used;
|
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if (!length) {
|
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DRM_ERROR("0 length buffer\n");
|
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}
|
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if (buf->pending) {
|
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DRM_ERROR("Sending pending buffer:"
|
|
" buffer %d, offset %d\n",
|
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send_indices[i], i);
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retcode = -EINVAL;
|
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goto cleanup;
|
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}
|
|
if (buf->waiting) {
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DRM_ERROR("Sending waiting buffer:"
|
|
" buffer %d, offset %d\n",
|
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send_indices[i], i);
|
|
retcode = -EINVAL;
|
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goto cleanup;
|
|
}
|
|
buf->pending = 1;
|
|
|
|
if (dev->last_context != buf->context
|
|
&& !(dev->queuelist[buf->context]->flags
|
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& _DRM_CONTEXT_PRESERVED)) {
|
|
add_wait_queue(&dev->context_wait, &entry);
|
|
current->state = TASK_INTERRUPTIBLE;
|
|
/* PRE: dev->last_context != buf->context */
|
|
DRM(context_switch)(dev, dev->last_context,
|
|
buf->context);
|
|
/* POST: we will wait for the context
|
|
switch and will dispatch on a later call
|
|
when dev->last_context == buf->context.
|
|
NOTE WE HOLD THE LOCK THROUGHOUT THIS
|
|
TIME! */
|
|
schedule();
|
|
current->state = TASK_RUNNING;
|
|
remove_wait_queue(&dev->context_wait, &entry);
|
|
if (signal_pending(current)) {
|
|
retcode = -EINTR;
|
|
goto cleanup;
|
|
}
|
|
if (dev->last_context != buf->context) {
|
|
DRM_ERROR("Context mismatch: %d %d\n",
|
|
dev->last_context,
|
|
buf->context);
|
|
}
|
|
}
|
|
|
|
gamma_dma_dispatch(dev, address, length);
|
|
atomic_inc(&dev->counts[9]); /* _DRM_STAT_SPECIAL */
|
|
atomic_add(length, &dev->counts[8]); /* _DRM_STAT_PRIMARY */
|
|
|
|
if (last_buf) {
|
|
gamma_free_buffer(dev, last_buf);
|
|
}
|
|
last_buf = buf;
|
|
}
|
|
|
|
|
|
cleanup:
|
|
if (last_buf) {
|
|
gamma_dma_ready(dev);
|
|
gamma_free_buffer(dev, last_buf);
|
|
}
|
|
if (send_indices)
|
|
DRM(free)(send_indices, d->send_count * sizeof(*send_indices),
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DRM_MEM_DRIVER);
|
|
if (send_sizes)
|
|
DRM(free)(send_sizes, d->send_count * sizeof(*send_sizes),
|
|
DRM_MEM_DRIVER);
|
|
|
|
if (must_free && !dev->context_flag) {
|
|
if (gamma_lock_free(dev, &dev->lock.hw_lock->lock,
|
|
DRM_KERNEL_CONTEXT)) {
|
|
DRM_ERROR("\n");
|
|
}
|
|
}
|
|
clear_bit(0, &dev->interrupt_flag);
|
|
return retcode;
|
|
}
|
|
|
|
static int gamma_dma_send_buffers(struct file *filp,
|
|
drm_device_t *dev, drm_dma_t *d)
|
|
{
|
|
DECLARE_WAITQUEUE(entry, current);
|
|
drm_buf_t *last_buf = NULL;
|
|
int retcode = 0;
|
|
drm_device_dma_t *dma = dev->dma;
|
|
int send_index;
|
|
|
|
if (get_user(send_index, &d->send_indices[d->send_count-1]))
|
|
return -EFAULT;
|
|
|
|
if (d->flags & _DRM_DMA_BLOCK) {
|
|
last_buf = dma->buflist[send_index];
|
|
add_wait_queue(&last_buf->dma_wait, &entry);
|
|
}
|
|
|
|
if ((retcode = gamma_dma_enqueue(filp, d))) {
|
|
if (d->flags & _DRM_DMA_BLOCK)
|
|
remove_wait_queue(&last_buf->dma_wait, &entry);
|
|
return retcode;
|
|
}
|
|
|
|
gamma_dma_schedule(dev, 0);
|
|
|
|
if (d->flags & _DRM_DMA_BLOCK) {
|
|
DRM_DEBUG("%d waiting\n", current->pid);
|
|
for (;;) {
|
|
current->state = TASK_INTERRUPTIBLE;
|
|
if (!last_buf->waiting && !last_buf->pending)
|
|
break; /* finished */
|
|
schedule();
|
|
if (signal_pending(current)) {
|
|
retcode = -EINTR; /* Can't restart */
|
|
break;
|
|
}
|
|
}
|
|
current->state = TASK_RUNNING;
|
|
DRM_DEBUG("%d running\n", current->pid);
|
|
remove_wait_queue(&last_buf->dma_wait, &entry);
|
|
if (!retcode
|
|
|| (last_buf->list==DRM_LIST_PEND && !last_buf->pending)) {
|
|
if (!waitqueue_active(&last_buf->dma_wait)) {
|
|
gamma_free_buffer(dev, last_buf);
|
|
}
|
|
}
|
|
if (retcode) {
|
|
DRM_ERROR("ctx%d w%d p%d c%ld i%d l%d pid:%d\n",
|
|
d->context,
|
|
last_buf->waiting,
|
|
last_buf->pending,
|
|
(long)DRM_WAITCOUNT(dev, d->context),
|
|
last_buf->idx,
|
|
last_buf->list,
|
|
current->pid);
|
|
}
|
|
}
|
|
return retcode;
|
|
}
|
|
|
|
int gamma_dma(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_device_dma_t *dma = dev->dma;
|
|
int retcode = 0;
|
|
drm_dma_t __user *argp = (void __user *)arg;
|
|
drm_dma_t d;
|
|
|
|
if (copy_from_user(&d, argp, sizeof(d)))
|
|
return -EFAULT;
|
|
|
|
if (d.send_count < 0 || d.send_count > dma->buf_count) {
|
|
DRM_ERROR("Process %d trying to send %d buffers (of %d max)\n",
|
|
current->pid, d.send_count, dma->buf_count);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (d.request_count < 0 || d.request_count > dma->buf_count) {
|
|
DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
|
|
current->pid, d.request_count, dma->buf_count);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (d.send_count) {
|
|
if (d.flags & _DRM_DMA_PRIORITY)
|
|
retcode = gamma_dma_priority(filp, dev, &d);
|
|
else
|
|
retcode = gamma_dma_send_buffers(filp, dev, &d);
|
|
}
|
|
|
|
d.granted_count = 0;
|
|
|
|
if (!retcode && d.request_count) {
|
|
retcode = gamma_dma_get_buffers(filp, &d);
|
|
}
|
|
|
|
DRM_DEBUG("%d returning, granted = %d\n",
|
|
current->pid, d.granted_count);
|
|
if (copy_to_user(argp, &d, sizeof(d)))
|
|
return -EFAULT;
|
|
|
|
return retcode;
|
|
}
|
|
|
|
/* =============================================================
|
|
* DMA initialization, cleanup
|
|
*/
|
|
|
|
static int gamma_do_init_dma( drm_device_t *dev, drm_gamma_init_t *init )
|
|
{
|
|
drm_gamma_private_t *dev_priv;
|
|
drm_device_dma_t *dma = dev->dma;
|
|
drm_buf_t *buf;
|
|
int i;
|
|
struct list_head *list;
|
|
unsigned long *pgt;
|
|
|
|
DRM_DEBUG( "%s\n", __FUNCTION__ );
|
|
|
|
dev_priv = DRM(alloc)( sizeof(drm_gamma_private_t),
|
|
DRM_MEM_DRIVER );
|
|
if ( !dev_priv )
|
|
return -ENOMEM;
|
|
|
|
dev->dev_private = (void *)dev_priv;
|
|
|
|
memset( dev_priv, 0, sizeof(drm_gamma_private_t) );
|
|
|
|
dev_priv->num_rast = init->num_rast;
|
|
|
|
list_for_each(list, &dev->maplist->head) {
|
|
drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head);
|
|
if( r_list->map &&
|
|
r_list->map->type == _DRM_SHM &&
|
|
r_list->map->flags & _DRM_CONTAINS_LOCK ) {
|
|
dev_priv->sarea = r_list->map;
|
|
break;
|
|
}
|
|
}
|
|
|
|
dev_priv->mmio0 = drm_core_findmap(dev, init->mmio0);
|
|
dev_priv->mmio1 = drm_core_findmap(dev, init->mmio1);
|
|
dev_priv->mmio2 = drm_core_findmap(dev, init->mmio2);
|
|
dev_priv->mmio3 = drm_core_findmap(dev, init->mmio3);
|
|
|
|
dev_priv->sarea_priv = (drm_gamma_sarea_t *)
|
|
((u8 *)dev_priv->sarea->handle +
|
|
init->sarea_priv_offset);
|
|
|
|
if (init->pcimode) {
|
|
buf = dma->buflist[GLINT_DRI_BUF_COUNT];
|
|
pgt = buf->address;
|
|
|
|
for (i = 0; i < GLINT_DRI_BUF_COUNT; i++) {
|
|
buf = dma->buflist[i];
|
|
*pgt = virt_to_phys((void*)buf->address) | 0x07;
|
|
pgt++;
|
|
}
|
|
|
|
buf = dma->buflist[GLINT_DRI_BUF_COUNT];
|
|
} else {
|
|
dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
|
|
drm_core_ioremap( dev->agp_buffer_map, dev);
|
|
|
|
buf = dma->buflist[GLINT_DRI_BUF_COUNT];
|
|
pgt = buf->address;
|
|
|
|
for (i = 0; i < GLINT_DRI_BUF_COUNT; i++) {
|
|
buf = dma->buflist[i];
|
|
*pgt = (unsigned long)buf->address + 0x07;
|
|
pgt++;
|
|
}
|
|
|
|
buf = dma->buflist[GLINT_DRI_BUF_COUNT];
|
|
|
|
while (GAMMA_READ(GAMMA_INFIFOSPACE) < 1);
|
|
GAMMA_WRITE( GAMMA_GDMACONTROL, 0xe);
|
|
}
|
|
while (GAMMA_READ(GAMMA_INFIFOSPACE) < 2);
|
|
GAMMA_WRITE( GAMMA_PAGETABLEADDR, virt_to_phys((void*)buf->address) );
|
|
GAMMA_WRITE( GAMMA_PAGETABLELENGTH, 2 );
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gamma_do_cleanup_dma( drm_device_t *dev )
|
|
{
|
|
DRM_DEBUG( "%s\n", __FUNCTION__ );
|
|
|
|
/* Make sure interrupts are disabled here because the uninstall ioctl
|
|
* may not have been called from userspace and after dev_private
|
|
* is freed, it's too late.
|
|
*/
|
|
if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
|
|
if ( dev->irq_enabled )
|
|
DRM(irq_uninstall)(dev);
|
|
|
|
if ( dev->dev_private ) {
|
|
|
|
if ( dev->agp_buffer_map != NULL )
|
|
drm_core_ioremapfree( dev->agp_buffer_map, dev );
|
|
|
|
DRM(free)( dev->dev_private, sizeof(drm_gamma_private_t),
|
|
DRM_MEM_DRIVER );
|
|
dev->dev_private = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gamma_dma_init( 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_gamma_init_t init;
|
|
|
|
LOCK_TEST_WITH_RETURN( dev, filp );
|
|
|
|
if ( copy_from_user( &init, (drm_gamma_init_t __user *)arg, sizeof(init) ) )
|
|
return -EFAULT;
|
|
|
|
switch ( init.func ) {
|
|
case GAMMA_INIT_DMA:
|
|
return gamma_do_init_dma( dev, &init );
|
|
case GAMMA_CLEANUP_DMA:
|
|
return gamma_do_cleanup_dma( dev );
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int gamma_do_copy_dma( drm_device_t *dev, drm_gamma_copy_t *copy )
|
|
{
|
|
drm_device_dma_t *dma = dev->dma;
|
|
unsigned int *screenbuf;
|
|
|
|
DRM_DEBUG( "%s\n", __FUNCTION__ );
|
|
|
|
/* We've DRM_RESTRICTED this DMA buffer */
|
|
|
|
screenbuf = dma->buflist[ GLINT_DRI_BUF_COUNT + 1 ]->address;
|
|
|
|
#if 0
|
|
*buffer++ = 0x180; /* Tag (FilterMode) */
|
|
*buffer++ = 0x200; /* Allow FBColor through */
|
|
*buffer++ = 0x53B; /* Tag */
|
|
*buffer++ = copy->Pitch;
|
|
*buffer++ = 0x53A; /* Tag */
|
|
*buffer++ = copy->SrcAddress;
|
|
*buffer++ = 0x539; /* Tag */
|
|
*buffer++ = copy->WidthHeight; /* Initiates transfer */
|
|
*buffer++ = 0x53C; /* Tag - DMAOutputAddress */
|
|
*buffer++ = virt_to_phys((void*)screenbuf);
|
|
*buffer++ = 0x53D; /* Tag - DMAOutputCount */
|
|
*buffer++ = copy->Count; /* Reads HostOutFifo BLOCKS until ..*/
|
|
|
|
/* Data now sitting in dma->buflist[ GLINT_DRI_BUF_COUNT + 1 ] */
|
|
/* Now put it back to the screen */
|
|
|
|
*buffer++ = 0x180; /* Tag (FilterMode) */
|
|
*buffer++ = 0x400; /* Allow Sync through */
|
|
*buffer++ = 0x538; /* Tag - DMARectangleReadTarget */
|
|
*buffer++ = 0x155; /* FBSourceData | count */
|
|
*buffer++ = 0x537; /* Tag */
|
|
*buffer++ = copy->Pitch;
|
|
*buffer++ = 0x536; /* Tag */
|
|
*buffer++ = copy->DstAddress;
|
|
*buffer++ = 0x535; /* Tag */
|
|
*buffer++ = copy->WidthHeight; /* Initiates transfer */
|
|
*buffer++ = 0x530; /* Tag - DMAAddr */
|
|
*buffer++ = virt_to_phys((void*)screenbuf);
|
|
*buffer++ = 0x531;
|
|
*buffer++ = copy->Count; /* initiates DMA transfer of color data */
|
|
#endif
|
|
|
|
/* need to dispatch it now */
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gamma_dma_copy( 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_gamma_copy_t copy;
|
|
|
|
if ( copy_from_user( ©, (drm_gamma_copy_t __user *)arg, sizeof(copy) ) )
|
|
return -EFAULT;
|
|
|
|
return gamma_do_copy_dma( dev, © );
|
|
}
|
|
|
|
/* =============================================================
|
|
* Per Context SAREA Support
|
|
*/
|
|
|
|
int gamma_getsareactx(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_ctx_priv_map_t __user *argp = (void __user *)arg;
|
|
drm_ctx_priv_map_t request;
|
|
drm_map_t *map;
|
|
|
|
if (copy_from_user(&request, argp, sizeof(request)))
|
|
return -EFAULT;
|
|
|
|
down(&dev->struct_sem);
|
|
if ((int)request.ctx_id >= dev->max_context) {
|
|
up(&dev->struct_sem);
|
|
return -EINVAL;
|
|
}
|
|
|
|
map = dev->context_sareas[request.ctx_id];
|
|
up(&dev->struct_sem);
|
|
|
|
request.handle = map->handle;
|
|
if (copy_to_user(argp, &request, sizeof(request)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
int gamma_setsareactx(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_ctx_priv_map_t request;
|
|
drm_map_t *map = NULL;
|
|
drm_map_list_t *r_list;
|
|
struct list_head *list;
|
|
|
|
if (copy_from_user(&request,
|
|
(drm_ctx_priv_map_t __user *)arg,
|
|
sizeof(request)))
|
|
return -EFAULT;
|
|
|
|
down(&dev->struct_sem);
|
|
r_list = NULL;
|
|
list_for_each(list, &dev->maplist->head) {
|
|
r_list = list_entry(list, drm_map_list_t, head);
|
|
if(r_list->map &&
|
|
r_list->map->handle == request.handle) break;
|
|
}
|
|
if (list == &(dev->maplist->head)) {
|
|
up(&dev->struct_sem);
|
|
return -EINVAL;
|
|
}
|
|
map = r_list->map;
|
|
up(&dev->struct_sem);
|
|
|
|
if (!map) return -EINVAL;
|
|
|
|
down(&dev->struct_sem);
|
|
if ((int)request.ctx_id >= dev->max_context) {
|
|
up(&dev->struct_sem);
|
|
return -EINVAL;
|
|
}
|
|
dev->context_sareas[request.ctx_id] = map;
|
|
up(&dev->struct_sem);
|
|
return 0;
|
|
}
|
|
|
|
void gamma_driver_irq_preinstall( drm_device_t *dev ) {
|
|
drm_gamma_private_t *dev_priv =
|
|
(drm_gamma_private_t *)dev->dev_private;
|
|
|
|
while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2)
|
|
cpu_relax();
|
|
|
|
GAMMA_WRITE( GAMMA_GCOMMANDMODE, 0x00000004 );
|
|
GAMMA_WRITE( GAMMA_GDMACONTROL, 0x00000000 );
|
|
}
|
|
|
|
void gamma_driver_irq_postinstall( drm_device_t *dev ) {
|
|
drm_gamma_private_t *dev_priv =
|
|
(drm_gamma_private_t *)dev->dev_private;
|
|
|
|
while(GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
|
|
cpu_relax();
|
|
|
|
GAMMA_WRITE( GAMMA_GINTENABLE, 0x00002001 );
|
|
GAMMA_WRITE( GAMMA_COMMANDINTENABLE, 0x00000008 );
|
|
GAMMA_WRITE( GAMMA_GDELAYTIMER, 0x00039090 );
|
|
}
|
|
|
|
void gamma_driver_irq_uninstall( drm_device_t *dev ) {
|
|
drm_gamma_private_t *dev_priv =
|
|
(drm_gamma_private_t *)dev->dev_private;
|
|
if (!dev_priv)
|
|
return;
|
|
|
|
while(GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
|
|
cpu_relax();
|
|
|
|
GAMMA_WRITE( GAMMA_GDELAYTIMER, 0x00000000 );
|
|
GAMMA_WRITE( GAMMA_COMMANDINTENABLE, 0x00000000 );
|
|
GAMMA_WRITE( GAMMA_GINTENABLE, 0x00000000 );
|
|
}
|
|
|
|
extern drm_ioctl_desc_t DRM(ioctls)[];
|
|
|
|
static int gamma_driver_preinit(drm_device_t *dev)
|
|
{
|
|
/* reset the finish ioctl */
|
|
DRM(ioctls)[DRM_IOCTL_NR(DRM_IOCTL_FINISH)].func = DRM(finish);
|
|
return 0;
|
|
}
|
|
|
|
static void gamma_driver_pretakedown(drm_device_t *dev)
|
|
{
|
|
gamma_do_cleanup_dma(dev);
|
|
}
|
|
|
|
static void gamma_driver_dma_ready(drm_device_t *dev)
|
|
{
|
|
gamma_dma_ready(dev);
|
|
}
|
|
|
|
static int gamma_driver_dma_quiescent(drm_device_t *dev)
|
|
{
|
|
drm_gamma_private_t *dev_priv = (
|
|
drm_gamma_private_t *)dev->dev_private;
|
|
if (dev_priv->num_rast == 2)
|
|
gamma_dma_quiescent_dual(dev);
|
|
else gamma_dma_quiescent_single(dev);
|
|
return 0;
|
|
}
|
|
|
|
void gamma_driver_register_fns(drm_device_t *dev)
|
|
{
|
|
dev->driver_features = DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_PCI_DMA | DRIVER_HAVE_DMA | DRIVER_HAVE_IRQ;
|
|
DRM(fops).read = gamma_fops_read;
|
|
DRM(fops).poll = gamma_fops_poll;
|
|
dev->driver.preinit = gamma_driver_preinit;
|
|
dev->driver.pretakedown = gamma_driver_pretakedown;
|
|
dev->driver.dma_ready = gamma_driver_dma_ready;
|
|
dev->driver.dma_quiescent = gamma_driver_dma_quiescent;
|
|
dev->driver.dma_flush_block_and_flush = gamma_flush_block_and_flush;
|
|
dev->driver.dma_flush_unblock = gamma_flush_unblock;
|
|
}
|