/* mga_irq.c -- IRQ handling for radeon -*- linux-c -*- */ /* * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved. * * The Weather Channel (TM) funded Tungsten Graphics to develop the * initial release of the Radeon 8500 driver under the XFree86 license. * This notice must be preserved. * * 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: * Keith Whitwell * Eric Anholt */ #include "drmP.h" #include "drm.h" #include "mga_drm.h" #include "mga_drv.h" irqreturn_t mga_driver_irq_handler(DRM_IRQ_ARGS) { struct drm_device *dev = (struct drm_device *) arg; drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; int status; int handled = 0; status = MGA_READ(MGA_STATUS); /* VBLANK interrupt */ if (status & MGA_VLINEPEN) { MGA_WRITE(MGA_ICLEAR, MGA_VLINEICLR); atomic_inc(&dev->vbl_received); DRM_WAKEUP(&dev->vbl_queue); drm_vbl_send_signals(dev); handled = 1; } /* SOFTRAP interrupt */ if (status & MGA_SOFTRAPEN) { const u32 prim_start = MGA_READ(MGA_PRIMADDRESS); const u32 prim_end = MGA_READ(MGA_PRIMEND); MGA_WRITE(MGA_ICLEAR, MGA_SOFTRAPICLR); /* In addition to clearing the interrupt-pending bit, we * have to write to MGA_PRIMEND to re-start the DMA operation. */ if ((prim_start & ~0x03) != (prim_end & ~0x03)) { MGA_WRITE(MGA_PRIMEND, prim_end); } atomic_inc(&dev_priv->last_fence_retired); DRM_WAKEUP(&dev_priv->fence_queue); handled = 1; } if (handled) return IRQ_HANDLED; return IRQ_NONE; } int mga_driver_vblank_wait(struct drm_device * dev, unsigned int *sequence) { unsigned int cur_vblank; int ret = 0; /* Assume that the user has missed the current sequence number * by about a day rather than she wants to wait for years * using vertical blanks... */ DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, (((cur_vblank = atomic_read(&dev->vbl_received)) - *sequence) <= (1 << 23))); *sequence = cur_vblank; return ret; } int mga_driver_fence_wait(struct drm_device * dev, unsigned int *sequence) { drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; unsigned int cur_fence; int ret = 0; /* Assume that the user has missed the current sequence number * by about a day rather than she wants to wait for years * using fences. */ DRM_WAIT_ON(ret, dev_priv->fence_queue, 3 * DRM_HZ, (((cur_fence = atomic_read(&dev_priv->last_fence_retired)) - *sequence) <= (1 << 23))); *sequence = cur_fence; return ret; } void mga_driver_irq_preinstall(struct drm_device * dev) { drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; /* Disable *all* interrupts */ MGA_WRITE(MGA_IEN, 0); /* Clear bits if they're already high */ MGA_WRITE(MGA_ICLEAR, ~0); } void mga_driver_irq_postinstall(struct drm_device * dev) { drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; DRM_INIT_WAITQUEUE(&dev_priv->fence_queue); /* Turn on vertical blank interrupt and soft trap interrupt. */ MGA_WRITE(MGA_IEN, MGA_VLINEIEN | MGA_SOFTRAPEN); } void mga_driver_irq_uninstall(struct drm_device * dev) { drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; if (!dev_priv) return; /* Disable *all* interrupts */ MGA_WRITE(MGA_IEN, 0); dev->irq_enabled = 0; } /a> 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 
/**
 * \file drm_dma.c
 * DMA IOCTL and function support
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 */

/*
 * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
 *
 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include "drmP.h"

/**
 * Initialize the DMA data.
 *
 * \param dev DRM device.
 * \return zero on success or a negative value on failure.
 *
 * Allocate and initialize a drm_device_dma structure.
 */
int drm_dma_setup(drm_device_t * dev)
{
	int i;

	dev->dma = drm_alloc(sizeof(*dev->dma), DRM_MEM_DRIVER);
	if (!dev->dma)
		return -ENOMEM;

	memset(dev->dma, 0, sizeof(*dev->dma));

	for (i = 0; i <= DRM_MAX_ORDER; i++)
		memset(&dev->dma->bufs[i], 0, sizeof(dev->dma->bufs[0]));

	return 0;
}

/**
 * Cleanup the DMA resources.
 *
 * \param dev DRM device.
 *
 * Free all pages associated with DMA buffers, the buffers and pages lists, and
 * finally the the drm_device::dma structure itself.
 */
void drm_dma_takedown(drm_device_t * dev)
{
	drm_device_dma_t *dma = dev->dma;
	int i, j;

	if (!dma)
		return;

	/* Clear dma buffers */
	for (i = 0; i <= DRM_MAX_ORDER; i++) {
		if (dma->bufs[i].seg_count) {
			DRM_DEBUG("order %d: buf_count = %d,"
				  " seg_count = %d\n",
				  i,
				  dma->bufs[i].buf_count,
				  dma->bufs[i].seg_count);
			for (j = 0; j < dma->bufs[i].seg_count; j++) {
				if (dma->bufs[i].seglist[j]) {
					drm_free_pages(dma->bufs[i].seglist[j],
						       dma->bufs[i].page_order,
						       DRM_MEM_DMA);
				}
			}
			drm_free(dma->bufs[i].seglist,
				 dma->bufs[i].seg_count
				 * sizeof(*dma->bufs[0].seglist), DRM_MEM_SEGS);
		}
		if (dma->bufs[i].buf_count) {
			for (j = 0; j < dma->bufs[i].buf_count; j++) {
				if (dma->bufs[i].buflist[j].dev_private) {
					drm_free(dma->bufs[i].buflist[j].
						 dev_private,
						 dma->bufs[i].buflist[j].
						 dev_priv_size, DRM_MEM_BUFS);
				}
			}
			drm_free(dma->bufs[i].buflist,
				 dma->bufs[i].buf_count *
				 sizeof(*dma->bufs[0].buflist), DRM_MEM_BUFS);
		}
	}

	if (dma->buflist) {
		drm_free(dma->buflist,
			 dma->buf_count * sizeof(*dma->buflist), DRM_MEM_BUFS);
	}

	if (dma->pagelist) {
		drm_free(dma->pagelist,
			 dma->page_count * sizeof(*dma->pagelist),
			 DRM_MEM_PAGES);
	}
	drm_free(dev->dma, sizeof(*dev->dma), DRM_MEM_DRIVER);
	dev->dma = NULL;
}

/**
 * Free a buffer.
 *
 * \param dev DRM device.