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1275 |
phoenix |
/* 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) cpu_relax();
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GAMMA_WRITE(GAMMA_DMAADDRESS, address);
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while (GAMMA_READ(GAMMA_GCOMMANDSTATUS) != 4) 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)) cpu_relax();
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while (GAMMA_READ(GAMMA_INFIFOSPACE) < 2) 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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;
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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)) cpu_relax();
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while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3) 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)) 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)) 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)) 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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void gamma_dma_service(int irq, void *device, struct pt_regs *regs)
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{
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drm_device_t *dev = (drm_device_t *)device;
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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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atomic_inc(&dev->counts[6]); /* _DRM_STAT_IRQ */
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while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3) 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)) return;
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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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queue_task(&dev->tq, &tq_immediate);
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mark_bh(IMMEDIATE_BH);
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}
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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 DRM_DMA_HISTOGRAM
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cycles_t dma_start, dma_stop;
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#endif
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if (test_and_set_bit(0, &dev->dma_flag)) return -EBUSY;
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#if DRM_DMA_HISTOGRAM
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dma_start = get_cycles();
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#endif
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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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| 182 |
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| 183 |
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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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| 187 |
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| 188 |
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if (buf->while_locked) {
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| 189 |
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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, buf->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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| 197 |
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clear_bit(0, &dev->dma_flag);
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| 198 |
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return -EBUSY;
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| 199 |
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}
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| 200 |
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}
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| 201 |
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| 202 |
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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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| 205 |
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/* PRE: dev->last_context != buf->context */
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| 206 |
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if (DRM(context_switch)(dev, dev->last_context,
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| 207 |
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buf->context)) {
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| 208 |
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DRM(clear_next_buffer)(dev);
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DRM(free_buffer)(dev, buf);
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| 210 |
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}
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| 211 |
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retcode = -EBUSY;
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| 212 |
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goto cleanup;
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| 213 |
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| 214 |
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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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| 216 |
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when dev->last_context == buf->context.
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| 217 |
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NOTE WE HOLD THE LOCK THROUGHOUT THIS
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| 218 |
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TIME! */
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| 219 |
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}
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| 220 |
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| 221 |
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gamma_clear_next_buffer(dev);
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| 222 |
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buf->pending = 1;
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| 223 |
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buf->waiting = 0;
|
| 224 |
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buf->list = DRM_LIST_PEND;
|
| 225 |
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#if DRM_DMA_HISTOGRAM
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| 226 |
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buf->time_dispatched = get_cycles();
|
| 227 |
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#endif
|
| 228 |
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|
| 229 |
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/* WE NOW ARE ON LOGICAL PAGES!!! - overriding address */
|
| 230 |
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address = buf->idx << 12;
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| 231 |
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|
| 232 |
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gamma_dma_dispatch(dev, address, length);
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| 233 |
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gamma_free_buffer(dev, dma->this_buffer);
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| 234 |
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dma->this_buffer = buf;
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| 235 |
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|
|
| 236 |
|
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atomic_inc(&dev->counts[7]); /* _DRM_STAT_DMA */
|
| 237 |
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atomic_add(length, &dev->counts[8]); /* _DRM_STAT_PRIMARY */
|
| 238 |
|
|
|
| 239 |
|
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if (!buf->while_locked && !dev->context_flag && !locked) {
|
| 240 |
|
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if (gamma_lock_free(dev, &dev->lock.hw_lock->lock,
|
| 241 |
|
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DRM_KERNEL_CONTEXT)) {
|
| 242 |
|
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DRM_ERROR("\n");
|
| 243 |
|
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}
|
| 244 |
|
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}
|
| 245 |
|
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cleanup:
|
| 246 |
|
|
|
| 247 |
|
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clear_bit(0, &dev->dma_flag);
|
| 248 |
|
|
|
| 249 |
|
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#if DRM_DMA_HISTOGRAM
|
| 250 |
|
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dma_stop = get_cycles();
|
| 251 |
|
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atomic_inc(&dev->histo.dma[gamma_histogram_slot(dma_stop - dma_start)]);
|
| 252 |
|
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#endif
|
| 253 |
|
|
|
| 254 |
|
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return retcode;
|
| 255 |
|
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}
|
| 256 |
|
|
|
| 257 |
|
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static void gamma_dma_timer_bh(unsigned long dev)
|
| 258 |
|
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{
|
| 259 |
|
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gamma_dma_schedule((drm_device_t *)dev, 0);
|
| 260 |
|
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}
|
| 261 |
|
|
|
| 262 |
|
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void gamma_dma_immediate_bh(void *dev)
|
| 263 |
|
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{
|
| 264 |
|
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gamma_dma_schedule(dev, 0);
|
| 265 |
|
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}
|
| 266 |
|
|
|
| 267 |
|
|
int gamma_dma_schedule(drm_device_t *dev, int locked)
|
| 268 |
|
|
{
|
| 269 |
|
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int next;
|
| 270 |
|
|
drm_queue_t *q;
|
| 271 |
|
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drm_buf_t *buf;
|
| 272 |
|
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int retcode = 0;
|
| 273 |
|
|
int processed = 0;
|
| 274 |
|
|
int missed;
|
| 275 |
|
|
int expire = 20;
|
| 276 |
|
|
drm_device_dma_t *dma = dev->dma;
|
| 277 |
|
|
#if DRM_DMA_HISTOGRAM
|
| 278 |
|
|
cycles_t schedule_start;
|
| 279 |
|
|
#endif
|
| 280 |
|
|
|
| 281 |
|
|
if (test_and_set_bit(0, &dev->interrupt_flag)) {
|
| 282 |
|
|
/* Not reentrant */
|
| 283 |
|
|
atomic_inc(&dev->counts[10]); /* _DRM_STAT_MISSED */
|
| 284 |
|
|
return -EBUSY;
|
| 285 |
|
|
}
|
| 286 |
|
|
missed = atomic_read(&dev->counts[10]);
|
| 287 |
|
|
|
| 288 |
|
|
#if DRM_DMA_HISTOGRAM
|
| 289 |
|
|
schedule_start = get_cycles();
|
| 290 |
|
|
#endif
|
| 291 |
|
|
|
| 292 |
|
|
again:
|
| 293 |
|
|
if (dev->context_flag) {
|
| 294 |
|
|
clear_bit(0, &dev->interrupt_flag);
|
| 295 |
|
|
return -EBUSY;
|
| 296 |
|
|
}
|
| 297 |
|
|
if (dma->next_buffer) {
|
| 298 |
|
|
/* Unsent buffer that was previously
|
| 299 |
|
|
selected, but that couldn't be sent
|
| 300 |
|
|
because the lock could not be obtained
|
| 301 |
|
|
or the DMA engine wasn't ready. Try
|
| 302 |
|
|
again. */
|
| 303 |
|
|
if (!(retcode = gamma_do_dma(dev, locked))) ++processed;
|
| 304 |
|
|
} else {
|
| 305 |
|
|
do {
|
| 306 |
|
|
next = gamma_select_queue(dev, gamma_dma_timer_bh);
|
| 307 |
|
|
if (next >= 0) {
|
| 308 |
|
|
q = dev->queuelist[next];
|
| 309 |
|
|
buf = gamma_waitlist_get(&q->waitlist);
|
| 310 |
|
|
dma->next_buffer = buf;
|
| 311 |
|
|
dma->next_queue = q;
|
| 312 |
|
|
if (buf && buf->list == DRM_LIST_RECLAIM) {
|
| 313 |
|
|
gamma_clear_next_buffer(dev);
|
| 314 |
|
|
gamma_free_buffer(dev, buf);
|
| 315 |
|
|
}
|
| 316 |
|
|
}
|
| 317 |
|
|
} while (next >= 0 && !dma->next_buffer);
|
| 318 |
|
|
if (dma->next_buffer) {
|
| 319 |
|
|
if (!(retcode = gamma_do_dma(dev, locked))) {
|
| 320 |
|
|
++processed;
|
| 321 |
|
|
}
|
| 322 |
|
|
}
|
| 323 |
|
|
}
|
| 324 |
|
|
|
| 325 |
|
|
if (--expire) {
|
| 326 |
|
|
if (missed != atomic_read(&dev->counts[10])) {
|
| 327 |
|
|
if (gamma_dma_is_ready(dev)) goto again;
|
| 328 |
|
|
}
|
| 329 |
|
|
if (processed && gamma_dma_is_ready(dev)) {
|
| 330 |
|
|
processed = 0;
|
| 331 |
|
|
goto again;
|
| 332 |
|
|
}
|
| 333 |
|
|
}
|
| 334 |
|
|
|
| 335 |
|
|
clear_bit(0, &dev->interrupt_flag);
|
| 336 |
|
|
|
| 337 |
|
|
#if DRM_DMA_HISTOGRAM
|
| 338 |
|
|
atomic_inc(&dev->histo.schedule[gamma_histogram_slot(get_cycles()
|
| 339 |
|
|
- schedule_start)]);
|
| 340 |
|
|
#endif
|
| 341 |
|
|
return retcode;
|
| 342 |
|
|
}
|
| 343 |
|
|
|
| 344 |
|
|
static int gamma_dma_priority(drm_device_t *dev, drm_dma_t *d)
|
| 345 |
|
|
{
|
| 346 |
|
|
unsigned long address;
|
| 347 |
|
|
unsigned long length;
|
| 348 |
|
|
int must_free = 0;
|
| 349 |
|
|
int retcode = 0;
|
| 350 |
|
|
int i;
|
| 351 |
|
|
int idx;
|
| 352 |
|
|
drm_buf_t *buf;
|
| 353 |
|
|
drm_buf_t *last_buf = NULL;
|
| 354 |
|
|
drm_device_dma_t *dma = dev->dma;
|
| 355 |
|
|
DECLARE_WAITQUEUE(entry, current);
|
| 356 |
|
|
|
| 357 |
|
|
/* Turn off interrupt handling */
|
| 358 |
|
|
while (test_and_set_bit(0, &dev->interrupt_flag)) {
|
| 359 |
|
|
schedule();
|
| 360 |
|
|
if (signal_pending(current)) return -EINTR;
|
| 361 |
|
|
}
|
| 362 |
|
|
if (!(d->flags & _DRM_DMA_WHILE_LOCKED)) {
|
| 363 |
|
|
while (!gamma_lock_take(&dev->lock.hw_lock->lock,
|
| 364 |
|
|
DRM_KERNEL_CONTEXT)) {
|
| 365 |
|
|
schedule();
|
| 366 |
|
|
if (signal_pending(current)) {
|
| 367 |
|
|
clear_bit(0, &dev->interrupt_flag);
|
| 368 |
|
|
return -EINTR;
|
| 369 |
|
|
}
|
| 370 |
|
|
}
|
| 371 |
|
|
++must_free;
|
| 372 |
|
|
}
|
| 373 |
|
|
|
| 374 |
|
|
for (i = 0; i < d->send_count; i++) {
|
| 375 |
|
|
idx = d->send_indices[i];
|
| 376 |
|
|
if (idx < 0 || idx >= dma->buf_count) {
|
| 377 |
|
|
DRM_ERROR("Index %d (of %d max)\n",
|
| 378 |
|
|
d->send_indices[i], dma->buf_count - 1);
|
| 379 |
|
|
continue;
|
| 380 |
|
|
}
|
| 381 |
|
|
buf = dma->buflist[ idx ];
|
| 382 |
|
|
if (buf->pid != current->pid) {
|
| 383 |
|
|
DRM_ERROR("Process %d using buffer owned by %d\n",
|
| 384 |
|
|
current->pid, buf->pid);
|
| 385 |
|
|
retcode = -EINVAL;
|
| 386 |
|
|
goto cleanup;
|
| 387 |
|
|
}
|
| 388 |
|
|
if (buf->list != DRM_LIST_NONE) {
|
| 389 |
|
|
DRM_ERROR("Process %d using %d's buffer on list %d\n",
|
| 390 |
|
|
current->pid, buf->pid, buf->list);
|
| 391 |
|
|
retcode = -EINVAL;
|
| 392 |
|
|
goto cleanup;
|
| 393 |
|
|
}
|
| 394 |
|
|
/* This isn't a race condition on
|
| 395 |
|
|
buf->list, since our concern is the
|
| 396 |
|
|
buffer reclaim during the time the
|
| 397 |
|
|
process closes the /dev/drm? handle, so
|
| 398 |
|
|
it can't also be doing DMA. */
|
| 399 |
|
|
buf->list = DRM_LIST_PRIO;
|
| 400 |
|
|
buf->used = d->send_sizes[i];
|
| 401 |
|
|
buf->context = d->context;
|
| 402 |
|
|
buf->while_locked = d->flags & _DRM_DMA_WHILE_LOCKED;
|
| 403 |
|
|
address = (unsigned long)buf->address;
|
| 404 |
|
|
length = buf->used;
|
| 405 |
|
|
if (!length) {
|
| 406 |
|
|
DRM_ERROR("0 length buffer\n");
|
| 407 |
|
|
}
|
| 408 |
|
|
if (buf->pending) {
|
| 409 |
|
|
DRM_ERROR("Sending pending buffer:"
|
| 410 |
|
|
" buffer %d, offset %d\n",
|
| 411 |
|
|
d->send_indices[i], i);
|
| 412 |
|
|
retcode = -EINVAL;
|
| 413 |
|
|
goto cleanup;
|
| 414 |
|
|
}
|
| 415 |
|
|
if (buf->waiting) {
|
| 416 |
|
|
DRM_ERROR("Sending waiting buffer:"
|
| 417 |
|
|
" buffer %d, offset %d\n",
|
| 418 |
|
|
d->send_indices[i], i);
|
| 419 |
|
|
retcode = -EINVAL;
|
| 420 |
|
|
goto cleanup;
|
| 421 |
|
|
}
|
| 422 |
|
|
buf->pending = 1;
|
| 423 |
|
|
|
| 424 |
|
|
if (dev->last_context != buf->context
|
| 425 |
|
|
&& !(dev->queuelist[buf->context]->flags
|
| 426 |
|
|
& _DRM_CONTEXT_PRESERVED)) {
|
| 427 |
|
|
add_wait_queue(&dev->context_wait, &entry);
|
| 428 |
|
|
current->state = TASK_INTERRUPTIBLE;
|
| 429 |
|
|
/* PRE: dev->last_context != buf->context */
|
| 430 |
|
|
DRM(context_switch)(dev, dev->last_context,
|
| 431 |
|
|
buf->context);
|
| 432 |
|
|
/* POST: we will wait for the context
|
| 433 |
|
|
switch and will dispatch on a later call
|
| 434 |
|
|
when dev->last_context == buf->context.
|
| 435 |
|
|
NOTE WE HOLD THE LOCK THROUGHOUT THIS
|
| 436 |
|
|
TIME! */
|
| 437 |
|
|
schedule();
|
| 438 |
|
|
current->state = TASK_RUNNING;
|
| 439 |
|
|
remove_wait_queue(&dev->context_wait, &entry);
|
| 440 |
|
|
if (signal_pending(current)) {
|
| 441 |
|
|
retcode = -EINTR;
|
| 442 |
|
|
goto cleanup;
|
| 443 |
|
|
}
|
| 444 |
|
|
if (dev->last_context != buf->context) {
|
| 445 |
|
|
DRM_ERROR("Context mismatch: %d %d\n",
|
| 446 |
|
|
dev->last_context,
|
| 447 |
|
|
buf->context);
|
| 448 |
|
|
}
|
| 449 |
|
|
}
|
| 450 |
|
|
|
| 451 |
|
|
#if DRM_DMA_HISTOGRAM
|
| 452 |
|
|
buf->time_queued = get_cycles();
|
| 453 |
|
|
buf->time_dispatched = buf->time_queued;
|
| 454 |
|
|
#endif
|
| 455 |
|
|
gamma_dma_dispatch(dev, address, length);
|
| 456 |
|
|
atomic_inc(&dev->counts[9]); /* _DRM_STAT_SPECIAL */
|
| 457 |
|
|
atomic_add(length, &dev->counts[8]); /* _DRM_STAT_PRIMARY */
|
| 458 |
|
|
|
| 459 |
|
|
if (last_buf) {
|
| 460 |
|
|
gamma_free_buffer(dev, last_buf);
|
| 461 |
|
|
}
|
| 462 |
|
|
last_buf = buf;
|
| 463 |
|
|
}
|
| 464 |
|
|
|
| 465 |
|
|
|
| 466 |
|
|
cleanup:
|
| 467 |
|
|
if (last_buf) {
|
| 468 |
|
|
gamma_dma_ready(dev);
|
| 469 |
|
|
gamma_free_buffer(dev, last_buf);
|
| 470 |
|
|
}
|
| 471 |
|
|
|
| 472 |
|
|
if (must_free && !dev->context_flag) {
|
| 473 |
|
|
if (gamma_lock_free(dev, &dev->lock.hw_lock->lock,
|
| 474 |
|
|
DRM_KERNEL_CONTEXT)) {
|
| 475 |
|
|
DRM_ERROR("\n");
|
| 476 |
|
|
}
|
| 477 |
|
|
}
|
| 478 |
|
|
clear_bit(0, &dev->interrupt_flag);
|
| 479 |
|
|
return retcode;
|
| 480 |
|
|
}
|
| 481 |
|
|
|
| 482 |
|
|
static int gamma_dma_send_buffers(drm_device_t *dev, drm_dma_t *d)
|
| 483 |
|
|
{
|
| 484 |
|
|
DECLARE_WAITQUEUE(entry, current);
|
| 485 |
|
|
drm_buf_t *last_buf = NULL;
|
| 486 |
|
|
int retcode = 0;
|
| 487 |
|
|
drm_device_dma_t *dma = dev->dma;
|
| 488 |
|
|
|
| 489 |
|
|
if (d->flags & _DRM_DMA_BLOCK) {
|
| 490 |
|
|
last_buf = dma->buflist[d->send_indices[d->send_count-1]];
|
| 491 |
|
|
add_wait_queue(&last_buf->dma_wait, &entry);
|
| 492 |
|
|
}
|
| 493 |
|
|
|
| 494 |
|
|
if ((retcode = gamma_dma_enqueue(dev, d))) {
|
| 495 |
|
|
if (d->flags & _DRM_DMA_BLOCK)
|
| 496 |
|
|
remove_wait_queue(&last_buf->dma_wait, &entry);
|
| 497 |
|
|
return retcode;
|
| 498 |
|
|
}
|
| 499 |
|
|
|
| 500 |
|
|
gamma_dma_schedule(dev, 0);
|
| 501 |
|
|
|
| 502 |
|
|
if (d->flags & _DRM_DMA_BLOCK) {
|
| 503 |
|
|
DRM_DEBUG("%d waiting\n", current->pid);
|
| 504 |
|
|
for (;;) {
|
| 505 |
|
|
current->state = TASK_INTERRUPTIBLE;
|
| 506 |
|
|
if (!last_buf->waiting && !last_buf->pending)
|
| 507 |
|
|
break; /* finished */
|
| 508 |
|
|
schedule();
|
| 509 |
|
|
if (signal_pending(current)) {
|
| 510 |
|
|
retcode = -EINTR; /* Can't restart */
|
| 511 |
|
|
break;
|
| 512 |
|
|
}
|
| 513 |
|
|
}
|
| 514 |
|
|
current->state = TASK_RUNNING;
|
| 515 |
|
|
DRM_DEBUG("%d running\n", current->pid);
|
| 516 |
|
|
remove_wait_queue(&last_buf->dma_wait, &entry);
|
| 517 |
|
|
if (!retcode
|
| 518 |
|
|
|| (last_buf->list==DRM_LIST_PEND && !last_buf->pending)) {
|
| 519 |
|
|
if (!waitqueue_active(&last_buf->dma_wait)) {
|
| 520 |
|
|
gamma_free_buffer(dev, last_buf);
|
| 521 |
|
|
}
|
| 522 |
|
|
}
|
| 523 |
|
|
if (retcode) {
|
| 524 |
|
|
DRM_ERROR("ctx%d w%d p%d c%ld i%d l%d %d/%d\n",
|
| 525 |
|
|
d->context,
|
| 526 |
|
|
last_buf->waiting,
|
| 527 |
|
|
last_buf->pending,
|
| 528 |
|
|
(long)DRM_WAITCOUNT(dev, d->context),
|
| 529 |
|
|
last_buf->idx,
|
| 530 |
|
|
last_buf->list,
|
| 531 |
|
|
last_buf->pid,
|
| 532 |
|
|
current->pid);
|
| 533 |
|
|
}
|
| 534 |
|
|
}
|
| 535 |
|
|
return retcode;
|
| 536 |
|
|
}
|
| 537 |
|
|
|
| 538 |
|
|
int gamma_dma(struct inode *inode, struct file *filp, unsigned int cmd,
|
| 539 |
|
|
unsigned long arg)
|
| 540 |
|
|
{
|
| 541 |
|
|
drm_file_t *priv = filp->private_data;
|
| 542 |
|
|
drm_device_t *dev = priv->dev;
|
| 543 |
|
|
drm_device_dma_t *dma = dev->dma;
|
| 544 |
|
|
int retcode = 0;
|
| 545 |
|
|
drm_dma_t d;
|
| 546 |
|
|
|
| 547 |
|
|
if (copy_from_user(&d, (drm_dma_t *)arg, sizeof(d)))
|
| 548 |
|
|
return -EFAULT;
|
| 549 |
|
|
|
| 550 |
|
|
if (d.send_count < 0 || d.send_count > dma->buf_count) {
|
| 551 |
|
|
DRM_ERROR("Process %d trying to send %d buffers (of %d max)\n",
|
| 552 |
|
|
current->pid, d.send_count, dma->buf_count);
|
| 553 |
|
|
return -EINVAL;
|
| 554 |
|
|
}
|
| 555 |
|
|
|
| 556 |
|
|
if (d.request_count < 0 || d.request_count > dma->buf_count) {
|
| 557 |
|
|
DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
|
| 558 |
|
|
current->pid, d.request_count, dma->buf_count);
|
| 559 |
|
|
return -EINVAL;
|
| 560 |
|
|
}
|
| 561 |
|
|
|
| 562 |
|
|
if (d.send_count) {
|
| 563 |
|
|
if (d.flags & _DRM_DMA_PRIORITY)
|
| 564 |
|
|
retcode = gamma_dma_priority(dev, &d);
|
| 565 |
|
|
else
|
| 566 |
|
|
retcode = gamma_dma_send_buffers(dev, &d);
|
| 567 |
|
|
}
|
| 568 |
|
|
|
| 569 |
|
|
d.granted_count = 0;
|
| 570 |
|
|
|
| 571 |
|
|
if (!retcode && d.request_count) {
|
| 572 |
|
|
retcode = gamma_dma_get_buffers(dev, &d);
|
| 573 |
|
|
}
|
| 574 |
|
|
|
| 575 |
|
|
DRM_DEBUG("%d returning, granted = %d\n",
|
| 576 |
|
|
current->pid, d.granted_count);
|
| 577 |
|
|
if (copy_to_user((drm_dma_t *)arg, &d, sizeof(d)))
|
| 578 |
|
|
return -EFAULT;
|
| 579 |
|
|
|
| 580 |
|
|
return retcode;
|
| 581 |
|
|
}
|
| 582 |
|
|
|
| 583 |
|
|
/* =============================================================
|
| 584 |
|
|
* DMA initialization, cleanup
|
| 585 |
|
|
*/
|
| 586 |
|
|
|
| 587 |
|
|
static int gamma_do_init_dma( drm_device_t *dev, drm_gamma_init_t *init )
|
| 588 |
|
|
{
|
| 589 |
|
|
drm_gamma_private_t *dev_priv;
|
| 590 |
|
|
drm_device_dma_t *dma = dev->dma;
|
| 591 |
|
|
drm_buf_t *buf;
|
| 592 |
|
|
int i;
|
| 593 |
|
|
struct list_head *list;
|
| 594 |
|
|
unsigned long *pgt;
|
| 595 |
|
|
|
| 596 |
|
|
DRM_DEBUG( "%s\n", __FUNCTION__ );
|
| 597 |
|
|
|
| 598 |
|
|
dev_priv = DRM(alloc)( sizeof(drm_gamma_private_t),
|
| 599 |
|
|
DRM_MEM_DRIVER );
|
| 600 |
|
|
if ( !dev_priv )
|
| 601 |
|
|
return -ENOMEM;
|
| 602 |
|
|
|
| 603 |
|
|
dev->dev_private = (void *)dev_priv;
|
| 604 |
|
|
|
| 605 |
|
|
memset( dev_priv, 0, sizeof(drm_gamma_private_t) );
|
| 606 |
|
|
|
| 607 |
|
|
list_for_each(list, &dev->maplist->head) {
|
| 608 |
|
|
#warning list_entry() is needed here
|
| 609 |
|
|
drm_map_list_t *r_list = (drm_map_list_t *)list;
|
| 610 |
|
|
if( r_list->map &&
|
| 611 |
|
|
r_list->map->type == _DRM_SHM &&
|
| 612 |
|
|
r_list->map->flags & _DRM_CONTAINS_LOCK ) {
|
| 613 |
|
|
dev_priv->sarea = r_list->map;
|
| 614 |
|
|
break;
|
| 615 |
|
|
}
|
| 616 |
|
|
}
|
| 617 |
|
|
|
| 618 |
|
|
DRM_FIND_MAP( dev_priv->mmio0, init->mmio0 );
|
| 619 |
|
|
DRM_FIND_MAP( dev_priv->mmio1, init->mmio1 );
|
| 620 |
|
|
DRM_FIND_MAP( dev_priv->mmio2, init->mmio2 );
|
| 621 |
|
|
DRM_FIND_MAP( dev_priv->mmio3, init->mmio3 );
|
| 622 |
|
|
|
| 623 |
|
|
dev_priv->sarea_priv = (drm_gamma_sarea_t *)
|
| 624 |
|
|
((u8 *)dev_priv->sarea->handle +
|
| 625 |
|
|
init->sarea_priv_offset);
|
| 626 |
|
|
|
| 627 |
|
|
if (init->pcimode) {
|
| 628 |
|
|
buf = dma->buflist[GLINT_DRI_BUF_COUNT];
|
| 629 |
|
|
pgt = buf->address;
|
| 630 |
|
|
|
| 631 |
|
|
for (i = 0; i < GLINT_DRI_BUF_COUNT; i++) {
|
| 632 |
|
|
buf = dma->buflist[i];
|
| 633 |
|
|
*pgt = virt_to_phys((void*)buf->address) | 0x07;
|
| 634 |
|
|
pgt++;
|
| 635 |
|
|
}
|
| 636 |
|
|
|
| 637 |
|
|
buf = dma->buflist[GLINT_DRI_BUF_COUNT];
|
| 638 |
|
|
} else {
|
| 639 |
|
|
DRM_FIND_MAP( dev_priv->buffers, init->buffers_offset );
|
| 640 |
|
|
|
| 641 |
|
|
DRM_IOREMAP( dev_priv->buffers, dev );
|
| 642 |
|
|
|
| 643 |
|
|
buf = dma->buflist[GLINT_DRI_BUF_COUNT];
|
| 644 |
|
|
pgt = buf->address;
|
| 645 |
|
|
|
| 646 |
|
|
for (i = 0; i < GLINT_DRI_BUF_COUNT; i++) {
|
| 647 |
|
|
buf = dma->buflist[i];
|
| 648 |
|
|
*pgt = (unsigned long)buf->address + 0x07;
|
| 649 |
|
|
pgt++;
|
| 650 |
|
|
}
|
| 651 |
|
|
|
| 652 |
|
|
buf = dma->buflist[GLINT_DRI_BUF_COUNT];
|
| 653 |
|
|
|
| 654 |
|
|
while (GAMMA_READ(GAMMA_INFIFOSPACE) < 1) cpu_relax();
|
| 655 |
|
|
GAMMA_WRITE( GAMMA_GDMACONTROL, 0xe) ;
|
| 656 |
|
|
}
|
| 657 |
|
|
while (GAMMA_READ(GAMMA_INFIFOSPACE) < 2); cpu_relax();
|
| 658 |
|
|
GAMMA_WRITE( GAMMA_PAGETABLEADDR, virt_to_phys((void*)buf->address) );
|
| 659 |
|
|
GAMMA_WRITE( GAMMA_PAGETABLELENGTH, 2 );
|
| 660 |
|
|
|
| 661 |
|
|
return 0;
|
| 662 |
|
|
}
|
| 663 |
|
|
|
| 664 |
|
|
int gamma_do_cleanup_dma( drm_device_t *dev )
|
| 665 |
|
|
{
|
| 666 |
|
|
DRM_DEBUG( "%s\n", __FUNCTION__ );
|
| 667 |
|
|
|
| 668 |
|
|
if ( dev->dev_private ) {
|
| 669 |
|
|
drm_gamma_private_t *dev_priv = dev->dev_private;
|
| 670 |
|
|
|
| 671 |
|
|
DRM_IOREMAPFREE( dev_priv->buffers, dev );
|
| 672 |
|
|
|
| 673 |
|
|
DRM(free)( dev->dev_private, sizeof(drm_gamma_private_t),
|
| 674 |
|
|
DRM_MEM_DRIVER );
|
| 675 |
|
|
dev->dev_private = NULL;
|
| 676 |
|
|
}
|
| 677 |
|
|
|
| 678 |
|
|
return 0;
|
| 679 |
|
|
}
|
| 680 |
|
|
|
| 681 |
|
|
int gamma_dma_init( struct inode *inode, struct file *filp,
|
| 682 |
|
|
unsigned int cmd, unsigned long arg )
|
| 683 |
|
|
{
|
| 684 |
|
|
drm_file_t *priv = filp->private_data;
|
| 685 |
|
|
drm_device_t *dev = priv->dev;
|
| 686 |
|
|
drm_gamma_init_t init;
|
| 687 |
|
|
|
| 688 |
|
|
if ( copy_from_user( &init, (drm_gamma_init_t *)arg, sizeof(init) ) )
|
| 689 |
|
|
return -EFAULT;
|
| 690 |
|
|
|
| 691 |
|
|
switch ( init.func ) {
|
| 692 |
|
|
case GAMMA_INIT_DMA:
|
| 693 |
|
|
return gamma_do_init_dma( dev, &init );
|
| 694 |
|
|
case GAMMA_CLEANUP_DMA:
|
| 695 |
|
|
return gamma_do_cleanup_dma( dev );
|
| 696 |
|
|
}
|
| 697 |
|
|
|
| 698 |
|
|
return -EINVAL;
|
| 699 |
|
|
}
|
| 700 |
|
|
|
| 701 |
|
|
static int gamma_do_copy_dma( drm_device_t *dev, drm_gamma_copy_t *copy )
|
| 702 |
|
|
{
|
| 703 |
|
|
drm_device_dma_t *dma = dev->dma;
|
| 704 |
|
|
unsigned int *screenbuf;
|
| 705 |
|
|
|
| 706 |
|
|
DRM_DEBUG( "%s\n", __FUNCTION__ );
|
| 707 |
|
|
|
| 708 |
|
|
/* We've DRM_RESTRICTED this DMA buffer */
|
| 709 |
|
|
|
| 710 |
|
|
screenbuf = dma->buflist[ GLINT_DRI_BUF_COUNT + 1 ]->address;
|
| 711 |
|
|
|
| 712 |
|
|
#if 0
|
| 713 |
|
|
*buffer++ = 0x180; /* Tag (FilterMode) */
|
| 714 |
|
|
*buffer++ = 0x200; /* Allow FBColor through */
|
| 715 |
|
|
*buffer++ = 0x53B; /* Tag */
|
| 716 |
|
|
*buffer++ = copy->Pitch;
|
| 717 |
|
|
*buffer++ = 0x53A; /* Tag */
|
| 718 |
|
|
*buffer++ = copy->SrcAddress;
|
| 719 |
|
|
*buffer++ = 0x539; /* Tag */
|
| 720 |
|
|
*buffer++ = copy->WidthHeight; /* Initiates transfer */
|
| 721 |
|
|
*buffer++ = 0x53C; /* Tag - DMAOutputAddress */
|
| 722 |
|
|
*buffer++ = virt_to_phys((void*)screenbuf);
|
| 723 |
|
|
*buffer++ = 0x53D; /* Tag - DMAOutputCount */
|
| 724 |
|
|
*buffer++ = copy->Count; /* Reads HostOutFifo BLOCKS until ..*/
|
| 725 |
|
|
|
| 726 |
|
|
/* Data now sitting in dma->buflist[ GLINT_DRI_BUF_COUNT + 1 ] */
|
| 727 |
|
|
/* Now put it back to the screen */
|
| 728 |
|
|
|
| 729 |
|
|
*buffer++ = 0x180; /* Tag (FilterMode) */
|
| 730 |
|
|
*buffer++ = 0x400; /* Allow Sync through */
|
| 731 |
|
|
*buffer++ = 0x538; /* Tag - DMARectangleReadTarget */
|
| 732 |
|
|
*buffer++ = 0x155; /* FBSourceData | count */
|
| 733 |
|
|
*buffer++ = 0x537; /* Tag */
|
| 734 |
|
|
*buffer++ = copy->Pitch;
|
| 735 |
|
|
*buffer++ = 0x536; /* Tag */
|
| 736 |
|
|
*buffer++ = copy->DstAddress;
|
| 737 |
|
|
*buffer++ = 0x535; /* Tag */
|
| 738 |
|
|
*buffer++ = copy->WidthHeight; /* Initiates transfer */
|
| 739 |
|
|
*buffer++ = 0x530; /* Tag - DMAAddr */
|
| 740 |
|
|
*buffer++ = virt_to_phys((void*)screenbuf);
|
| 741 |
|
|
*buffer++ = 0x531;
|
| 742 |
|
|
*buffer++ = copy->Count; /* initiates DMA transfer of color data */
|
| 743 |
|
|
#endif
|
| 744 |
|
|
|
| 745 |
|
|
/* need to dispatch it now */
|
| 746 |
|
|
|
| 747 |
|
|
return 0;
|
| 748 |
|
|
}
|
| 749 |
|
|
|
| 750 |
|
|
int gamma_dma_copy( struct inode *inode, struct file *filp,
|
| 751 |
|
|
unsigned int cmd, unsigned long arg )
|
| 752 |
|
|
{
|
| 753 |
|
|
drm_file_t *priv = filp->private_data;
|
| 754 |
|
|
drm_device_t *dev = priv->dev;
|
| 755 |
|
|
drm_gamma_copy_t copy;
|
| 756 |
|
|
|
| 757 |
|
|
if ( copy_from_user( ©, (drm_gamma_copy_t *)arg, sizeof(copy) ) )
|
| 758 |
|
|
return -EFAULT;
|
| 759 |
|
|
|
| 760 |
|
|
return gamma_do_copy_dma( dev, © );
|
| 761 |
|
|
}
|
| 762 |
|
|
|
| 763 |
|
|
/* =============================================================
|
| 764 |
|
|
* Per Context SAREA Support
|
| 765 |
|
|
*/
|
| 766 |
|
|
|
| 767 |
|
|
int gamma_getsareactx(struct inode *inode, struct file *filp,
|
| 768 |
|
|
unsigned int cmd, unsigned long arg)
|
| 769 |
|
|
{
|
| 770 |
|
|
drm_file_t *priv = filp->private_data;
|
| 771 |
|
|
drm_device_t *dev = priv->dev;
|
| 772 |
|
|
drm_ctx_priv_map_t request;
|
| 773 |
|
|
drm_map_t *map;
|
| 774 |
|
|
|
| 775 |
|
|
if (copy_from_user(&request,
|
| 776 |
|
|
(drm_ctx_priv_map_t *)arg,
|
| 777 |
|
|
sizeof(request)))
|
| 778 |
|
|
return -EFAULT;
|
| 779 |
|
|
|
| 780 |
|
|
down(&dev->struct_sem);
|
| 781 |
|
|
if ((int)request.ctx_id >= dev->max_context) {
|
| 782 |
|
|
up(&dev->struct_sem);
|
| 783 |
|
|
return -EINVAL;
|
| 784 |
|
|
}
|
| 785 |
|
|
|
| 786 |
|
|
map = dev->context_sareas[request.ctx_id];
|
| 787 |
|
|
up(&dev->struct_sem);
|
| 788 |
|
|
|
| 789 |
|
|
request.handle = map->handle;
|
| 790 |
|
|
if (copy_to_user((drm_ctx_priv_map_t *)arg, &request, sizeof(request)))
|
| 791 |
|
|
return -EFAULT;
|
| 792 |
|
|
return 0;
|
| 793 |
|
|
}
|
| 794 |
|
|
|
| 795 |
|
|
int gamma_setsareactx(struct inode *inode, struct file *filp,
|
| 796 |
|
|
unsigned int cmd, unsigned long arg)
|
| 797 |
|
|
{
|
| 798 |
|
|
drm_file_t *priv = filp->private_data;
|
| 799 |
|
|
drm_device_t *dev = priv->dev;
|
| 800 |
|
|
drm_ctx_priv_map_t request;
|
| 801 |
|
|
drm_map_t *map = NULL;
|
| 802 |
|
|
drm_map_list_t *r_list;
|
| 803 |
|
|
struct list_head *list;
|
| 804 |
|
|
|
| 805 |
|
|
if (copy_from_user(&request,
|
| 806 |
|
|
(drm_ctx_priv_map_t *)arg,
|
| 807 |
|
|
sizeof(request)))
|
| 808 |
|
|
return -EFAULT;
|
| 809 |
|
|
|
| 810 |
|
|
down(&dev->struct_sem);
|
| 811 |
|
|
r_list = NULL;
|
| 812 |
|
|
list_for_each(list, &dev->maplist->head) {
|
| 813 |
|
|
r_list = (drm_map_list_t *)list;
|
| 814 |
|
|
if(r_list->map &&
|
| 815 |
|
|
r_list->map->handle == request.handle) break;
|
| 816 |
|
|
}
|
| 817 |
|
|
if (list == &(dev->maplist->head)) {
|
| 818 |
|
|
up(&dev->struct_sem);
|
| 819 |
|
|
return -EINVAL;
|
| 820 |
|
|
}
|
| 821 |
|
|
map = r_list->map;
|
| 822 |
|
|
up(&dev->struct_sem);
|
| 823 |
|
|
|
| 824 |
|
|
if (!map) return -EINVAL;
|
| 825 |
|
|
|
| 826 |
|
|
down(&dev->struct_sem);
|
| 827 |
|
|
if ((int)request.ctx_id >= dev->max_context) {
|
| 828 |
|
|
up(&dev->struct_sem);
|
| 829 |
|
|
return -EINVAL;
|
| 830 |
|
|
}
|
| 831 |
|
|
dev->context_sareas[request.ctx_id] = map;
|
| 832 |
|
|
up(&dev->struct_sem);
|
| 833 |
|
|
return 0;
|
| 834 |
|
|
}
|
| 835 |
|
|
|
| 836 |
|
|
/* drm_dma.h hooks
|
| 837 |
|
|
*/
|
| 838 |
|
|
void DRM(driver_irq_preinstall)( drm_device_t *dev ) {
|
| 839 |
|
|
}
|
| 840 |
|
|
|
| 841 |
|
|
void DRM(driver_irq_postinstall)( drm_device_t *dev ) {
|
| 842 |
|
|
}
|
| 843 |
|
|
|
| 844 |
|
|
void DRM(driver_irq_uninstall)( drm_device_t *dev ) {
|
| 845 |
|
|
}
|
