File: [Development] / linux-2.6-xfs / drivers / char / drm / Attic / via_irq.c (download)
Revision 1.7, Wed Sep 12 17:09:56 2007 UTC (10 years, 1 month ago) by tes.longdrop.melbourne.sgi.com
Branch: MAIN
Changes since 1.6: +6 -6
lines
Update 2.6.x-xfs to 2.6.23-rc4.
Also update fs/xfs with external mainline changes.
There were 12 such missing commits that I detected:
--------
commit ad690ef9e690f6c31f7d310b09ef1314bcec9033
Author: Al Viro <viro@ftp.linux.org.uk>
xfs ioctl __user annotations
commit 20c2df83d25c6a95affe6157a4c9cac4cf5ffaac
Author: Paul Mundt <lethal@linux-sh.org>
mm: Remove slab destructors from kmem_cache_create().
commit d0217ac04ca6591841e5665f518e38064f4e65bd
Author: Nick Piggin <npiggin@suse.de>
mm: fault feedback #1
commit 54cb8821de07f2ffcd28c380ce9b93d5784b40d7
Author: Nick Piggin <npiggin@suse.de>
mm: merge populate and nopage into fault (fixes nonlinear)
commit d00806b183152af6d24f46f0c33f14162ca1262a
Author: Nick Piggin <npiggin@suse.de>
mm: fix fault vs invalidate race for linear mappings
commit a569425512253992cc64ebf8b6d00a62f986db3e
Author: Christoph Hellwig <hch@infradead.org>
knfsd: exportfs: add exportfs.h header
commit 831441862956fffa17b9801db37e6ea1650b0f69
Author: Rafael J. Wysocki <rjw@sisk.pl>
Freezer: make kernel threads nonfreezable by default
commit 8e1f936b73150f5095448a0fee6d4f30a1f9001d
Author: Rusty Russell <rusty@rustcorp.com.au>
mm: clean up and kernelify shrinker registration
commit 5ffc4ef45b3b0a57872f631b4e4ceb8ace0d7496
Author: Jens Axboe <jens.axboe@oracle.com>
sendfile: remove .sendfile from filesystems that use generic_file_sendfile()
commit 8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d
Author: Rafael J. Wysocki <rjw@sisk.pl>
Add suspend-related notifications for CPU hotplug
commit 59c51591a0ac7568824f541f57de967e88adaa07
Author: Michael Opdenacker <michael@free-electrons.com>
Fix occurrences of "the the "
commit 0ceb331433e8aad9c5f441a965d7c681f8b9046f
Author: Dmitriy Monakhov <dmonakhov@openvz.org>
mm: move common segment checks to separate helper function
--------
Merge of 2.6.x-xfs-melb:linux:29656b by kenmcd.
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/* via_irq.c
*
* Copyright 2004 BEAM Ltd.
* Copyright 2002 Tungsten Graphics, Inc.
* Copyright 2005 Thomas Hellstrom.
* 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
* BEAM LTD, TUNGSTEN GRAPHICS 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:
* Terry Barnaby <terry1@beam.ltd.uk>
* Keith Whitwell <keith@tungstengraphics.com>
* Thomas Hellstrom <unichrome@shipmail.org>
*
* This code provides standard DRM access to the Via Unichrome / Pro Vertical blank
* interrupt, as well as an infrastructure to handle other interrupts of the chip.
* The refresh rate is also calculated for video playback sync purposes.
*/
#include "drmP.h"
#include "drm.h"
#include "via_drm.h"
#include "via_drv.h"
#define VIA_REG_INTERRUPT 0x200
/* VIA_REG_INTERRUPT */
#define VIA_IRQ_GLOBAL (1 << 31)
#define VIA_IRQ_VBLANK_ENABLE (1 << 19)
#define VIA_IRQ_VBLANK_PENDING (1 << 3)
#define VIA_IRQ_HQV0_ENABLE (1 << 11)
#define VIA_IRQ_HQV1_ENABLE (1 << 25)
#define VIA_IRQ_HQV0_PENDING (1 << 9)
#define VIA_IRQ_HQV1_PENDING (1 << 10)
#define VIA_IRQ_DMA0_DD_ENABLE (1 << 20)
#define VIA_IRQ_DMA0_TD_ENABLE (1 << 21)
#define VIA_IRQ_DMA1_DD_ENABLE (1 << 22)
#define VIA_IRQ_DMA1_TD_ENABLE (1 << 23)
#define VIA_IRQ_DMA0_DD_PENDING (1 << 4)
#define VIA_IRQ_DMA0_TD_PENDING (1 << 5)
#define VIA_IRQ_DMA1_DD_PENDING (1 << 6)
#define VIA_IRQ_DMA1_TD_PENDING (1 << 7)
/*
* Device-specific IRQs go here. This type might need to be extended with
* the register if there are multiple IRQ control registers.
* Currently we activate the HQV interrupts of Unichrome Pro group A.
*/
static maskarray_t via_pro_group_a_irqs[] = {
{VIA_IRQ_HQV0_ENABLE, VIA_IRQ_HQV0_PENDING, 0x000003D0, 0x00008010,
0x00000000},
{VIA_IRQ_HQV1_ENABLE, VIA_IRQ_HQV1_PENDING, 0x000013D0, 0x00008010,
0x00000000},
{VIA_IRQ_DMA0_TD_ENABLE, VIA_IRQ_DMA0_TD_PENDING, VIA_PCI_DMA_CSR0,
VIA_DMA_CSR_TA | VIA_DMA_CSR_TD, 0x00000008},
{VIA_IRQ_DMA1_TD_ENABLE, VIA_IRQ_DMA1_TD_PENDING, VIA_PCI_DMA_CSR1,
VIA_DMA_CSR_TA | VIA_DMA_CSR_TD, 0x00000008},
};
static int via_num_pro_group_a =
sizeof(via_pro_group_a_irqs) / sizeof(maskarray_t);
static int via_irqmap_pro_group_a[] = {0, 1, -1, 2, -1, 3};
static maskarray_t via_unichrome_irqs[] = {
{VIA_IRQ_DMA0_TD_ENABLE, VIA_IRQ_DMA0_TD_PENDING, VIA_PCI_DMA_CSR0,
VIA_DMA_CSR_TA | VIA_DMA_CSR_TD, 0x00000008},
{VIA_IRQ_DMA1_TD_ENABLE, VIA_IRQ_DMA1_TD_PENDING, VIA_PCI_DMA_CSR1,
VIA_DMA_CSR_TA | VIA_DMA_CSR_TD, 0x00000008}
};
static int via_num_unichrome = sizeof(via_unichrome_irqs) / sizeof(maskarray_t);
static int via_irqmap_unichrome[] = {-1, -1, -1, 0, -1, 1};
static unsigned time_diff(struct timeval *now, struct timeval *then)
{
return (now->tv_usec >= then->tv_usec) ?
now->tv_usec - then->tv_usec :
1000000 - (then->tv_usec - now->tv_usec);
}
irqreturn_t via_driver_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
u32 status;
int handled = 0;
struct timeval cur_vblank;
drm_via_irq_t *cur_irq = dev_priv->via_irqs;
int i;
status = VIA_READ(VIA_REG_INTERRUPT);
if (status & VIA_IRQ_VBLANK_PENDING) {
atomic_inc(&dev->vbl_received);
if (!(atomic_read(&dev->vbl_received) & 0x0F)) {
do_gettimeofday(&cur_vblank);
if (dev_priv->last_vblank_valid) {
dev_priv->usec_per_vblank =
time_diff(&cur_vblank,
&dev_priv->last_vblank) >> 4;
}
dev_priv->last_vblank = cur_vblank;
dev_priv->last_vblank_valid = 1;
}
if (!(atomic_read(&dev->vbl_received) & 0xFF)) {
DRM_DEBUG("US per vblank is: %u\n",
dev_priv->usec_per_vblank);
}
DRM_WAKEUP(&dev->vbl_queue);
drm_vbl_send_signals(dev);
handled = 1;
}
for (i = 0; i < dev_priv->num_irqs; ++i) {
if (status & cur_irq->pending_mask) {
atomic_inc(&cur_irq->irq_received);
DRM_WAKEUP(&cur_irq->irq_queue);
handled = 1;
if (dev_priv->irq_map[drm_via_irq_dma0_td] == i) {
via_dmablit_handler(dev, 0, 1);
} else if (dev_priv->irq_map[drm_via_irq_dma1_td] == i) {
via_dmablit_handler(dev, 1, 1);
}
}
cur_irq++;
}
/* Acknowlege interrupts */
VIA_WRITE(VIA_REG_INTERRUPT, status);
if (handled)
return IRQ_HANDLED;
else
return IRQ_NONE;
}
static __inline__ void viadrv_acknowledge_irqs(drm_via_private_t * dev_priv)
{
u32 status;
if (dev_priv) {
/* Acknowlege interrupts */
status = VIA_READ(VIA_REG_INTERRUPT);
VIA_WRITE(VIA_REG_INTERRUPT, status |
dev_priv->irq_pending_mask);
}
}
int via_driver_vblank_wait(struct drm_device * dev, unsigned int *sequence)
{
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
unsigned int cur_vblank;
int ret = 0;
DRM_DEBUG("viadrv_vblank_wait\n");
if (!dev_priv) {
DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
return -EINVAL;
}
viadrv_acknowledge_irqs(dev_priv);
/* 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;
}
static int
via_driver_irq_wait(struct drm_device * dev, unsigned int irq, int force_sequence,
unsigned int *sequence)
{
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
unsigned int cur_irq_sequence;
drm_via_irq_t *cur_irq;
int ret = 0;
maskarray_t *masks;
int real_irq;
DRM_DEBUG("%s\n", __FUNCTION__);
if (!dev_priv) {
DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
return DRM_ERR(EINVAL);
}
if (irq >= drm_via_irq_num) {
DRM_ERROR("%s Trying to wait on unknown irq %d\n", __FUNCTION__,
irq);
return DRM_ERR(EINVAL);
}
real_irq = dev_priv->irq_map[irq];
if (real_irq < 0) {
DRM_ERROR("%s Video IRQ %d not available on this hardware.\n",
__FUNCTION__, irq);
return DRM_ERR(EINVAL);
}
masks = dev_priv->irq_masks;
cur_irq = dev_priv->via_irqs + real_irq;
if (masks[real_irq][2] && !force_sequence) {
DRM_WAIT_ON(ret, cur_irq->irq_queue, 3 * DRM_HZ,
((VIA_READ(masks[irq][2]) & masks[irq][3]) ==
masks[irq][4]));
cur_irq_sequence = atomic_read(&cur_irq->irq_received);
} else {
DRM_WAIT_ON(ret, cur_irq->irq_queue, 3 * DRM_HZ,
(((cur_irq_sequence =
atomic_read(&cur_irq->irq_received)) -
*sequence) <= (1 << 23)));
}
*sequence = cur_irq_sequence;
return ret;
}
/*
* drm_dma.h hooks
*/
void via_driver_irq_preinstall(struct drm_device * dev)
{
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
u32 status;
drm_via_irq_t *cur_irq;
int i;
DRM_DEBUG("driver_irq_preinstall: dev_priv: %p\n", dev_priv);
if (dev_priv) {
cur_irq = dev_priv->via_irqs;
dev_priv->irq_enable_mask = VIA_IRQ_VBLANK_ENABLE;
dev_priv->irq_pending_mask = VIA_IRQ_VBLANK_PENDING;
if (dev_priv->chipset == VIA_PRO_GROUP_A ||
dev_priv->chipset == VIA_DX9_0) {
dev_priv->irq_masks = via_pro_group_a_irqs;
dev_priv->num_irqs = via_num_pro_group_a;
dev_priv->irq_map = via_irqmap_pro_group_a;
} else {
dev_priv->irq_masks = via_unichrome_irqs;
dev_priv->num_irqs = via_num_unichrome;
dev_priv->irq_map = via_irqmap_unichrome;
}
for (i = 0; i < dev_priv->num_irqs; ++i) {
atomic_set(&cur_irq->irq_received, 0);
cur_irq->enable_mask = dev_priv->irq_masks[i][0];
cur_irq->pending_mask = dev_priv->irq_masks[i][1];
DRM_INIT_WAITQUEUE(&cur_irq->irq_queue);
dev_priv->irq_enable_mask |= cur_irq->enable_mask;
dev_priv->irq_pending_mask |= cur_irq->pending_mask;
cur_irq++;
DRM_DEBUG("Initializing IRQ %d\n", i);
}
dev_priv->last_vblank_valid = 0;
/* Clear VSync interrupt regs */
status = VIA_READ(VIA_REG_INTERRUPT);
VIA_WRITE(VIA_REG_INTERRUPT, status &
~(dev_priv->irq_enable_mask));
/* Clear bits if they're already high */
viadrv_acknowledge_irqs(dev_priv);
}
}
void via_driver_irq_postinstall(struct drm_device * dev)
{
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
u32 status;
DRM_DEBUG("via_driver_irq_postinstall\n");
if (dev_priv) {
status = VIA_READ(VIA_REG_INTERRUPT);
VIA_WRITE(VIA_REG_INTERRUPT, status | VIA_IRQ_GLOBAL
| dev_priv->irq_enable_mask);
/* Some magic, oh for some data sheets ! */
VIA_WRITE8(0x83d4, 0x11);
VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) | 0x30);
}
}
void via_driver_irq_uninstall(struct drm_device * dev)
{
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
u32 status;
DRM_DEBUG("driver_irq_uninstall)\n");
if (dev_priv) {
/* Some more magic, oh for some data sheets ! */
VIA_WRITE8(0x83d4, 0x11);
VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) & ~0x30);
status = VIA_READ(VIA_REG_INTERRUPT);
VIA_WRITE(VIA_REG_INTERRUPT, status &
~(VIA_IRQ_VBLANK_ENABLE | dev_priv->irq_enable_mask));
}
}
int via_wait_irq(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_via_irqwait_t __user *argp = (void __user *)data;
drm_via_irqwait_t irqwait;
struct timeval now;
int ret = 0;
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
drm_via_irq_t *cur_irq = dev_priv->via_irqs;
int force_sequence;
if (!dev->irq)
return DRM_ERR(EINVAL);
DRM_COPY_FROM_USER_IOCTL(irqwait, argp, sizeof(irqwait));
if (irqwait.request.irq >= dev_priv->num_irqs) {
DRM_ERROR("%s Trying to wait on unknown irq %d\n", __FUNCTION__,
irqwait.request.irq);
return DRM_ERR(EINVAL);
}
cur_irq += irqwait.request.irq;
switch (irqwait.request.type & ~VIA_IRQ_FLAGS_MASK) {
case VIA_IRQ_RELATIVE:
irqwait.request.sequence += atomic_read(&cur_irq->irq_received);
irqwait.request.type &= ~_DRM_VBLANK_RELATIVE;
case VIA_IRQ_ABSOLUTE:
break;
default:
return DRM_ERR(EINVAL);
}
if (irqwait.request.type & VIA_IRQ_SIGNAL) {
DRM_ERROR("%s Signals on Via IRQs not implemented yet.\n",
__FUNCTION__);
return DRM_ERR(EINVAL);
}
force_sequence = (irqwait.request.type & VIA_IRQ_FORCE_SEQUENCE);
ret = via_driver_irq_wait(dev, irqwait.request.irq, force_sequence,
&irqwait.request.sequence);
do_gettimeofday(&now);
irqwait.reply.tval_sec = now.tv_sec;
irqwait.reply.tval_usec = now.tv_usec;
DRM_COPY_TO_USER_IOCTL(argp, irqwait, sizeof(irqwait));
return ret;
}
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