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freebsd-skq/sys/dev/drm/via_irq.c
Warner Losh 592ffb2175 Revert drm2 removal. 
Revert r338177, r338176, r338175, r338174, r338172

After long consultations with re@, core members and mmacy, revert
these changes. Followup changes will be made to mark them as
deprecated and prent a message about where to find the up-to-date
driver.  Followup commits will be made to make this clear in the
installer. Followup commits to reduce POLA in ways we're still
exploring.

It's anticipated that after the freeze, this will be removed in
13-current (with the residual of the drm2 code copied to
sys/arm/dev/drm2 for the TEGRA port's use w/o the intel or
radeon drivers).

Due to the impending freeze, there was no formal core vote for
this. I've been talking to different core members all day, as well as
Matt Macey and Glen Barber. Nobody is completely happy, all are
grudgingly going along with this. Work is in progress to mitigate
the negative effects as much as possible.

Requested by: re@ (gjb, rgrimes)
2018-08-24 00:02:00 +00:00

393 lines
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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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "dev/drm/drmP.h"
#include "dev/drm/drm.h"
#include "dev/drm/via_drm.h"
#include "dev/drm/via_drv.h"
#define VIA_REG_INTERRUPT 0x200
/* VIA_REG_INTERRUPT */
#define VIA_IRQ_GLOBAL (1U << 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 = DRM_ARRAY_SIZE(via_pro_group_a_irqs);
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 = DRM_ARRAY_SIZE(via_unichrome_irqs);
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);
}
u32 via_get_vblank_counter(struct drm_device *dev, int crtc)
{
drm_via_private_t *dev_priv = dev->dev_private;
if (crtc != 0)
return 0;
return atomic_read(&dev_priv->vbl_received);
}
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_priv->vbl_received);
if (!(atomic_read(&dev_priv->vbl_received) & 0x0F)) {
microtime(&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_priv->vbl_received) & 0xFF)) {
DRM_DEBUG("US per vblank is: %u\n",
dev_priv->usec_per_vblank);
}
drm_handle_vblank(dev, 0);
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_enable_vblank(struct drm_device *dev, int crtc)
{
drm_via_private_t *dev_priv = dev->dev_private;
u32 status;
if (crtc != 0) {
DRM_ERROR("%s: bad crtc %d\n", __func__, crtc);
return -EINVAL;
}
status = VIA_READ(VIA_REG_INTERRUPT);
VIA_WRITE(VIA_REG_INTERRUPT, status & VIA_IRQ_VBLANK_ENABLE);
VIA_WRITE8(0x83d4, 0x11);
VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) | 0x30);
return 0;
}
void via_disable_vblank(struct drm_device *dev, int crtc)
{
drm_via_private_t *dev_priv = dev->dev_private;
VIA_WRITE8(0x83d4, 0x11);
VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) & ~0x30);
if (crtc != 0)
DRM_ERROR("%s: bad crtc %d\n", __func__, crtc);
}
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("\n");
if (!dev_priv) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
if (irq >= drm_via_irq_num) {
DRM_ERROR("Trying to wait on unknown irq %d\n", irq);
return -EINVAL;
}
real_irq = dev_priv->irq_map[irq];
if (real_irq < 0) {
DRM_ERROR("Video IRQ %d not available on this hardware.\n",
irq);
return -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("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);
}
}
int 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)
return -EINVAL;
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);
return 0;
}
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("\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(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
drm_via_irqwait_t *irqwait = data;
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 (irqwait->request.irq >= dev_priv->num_irqs) {
DRM_ERROR("Trying to wait on unknown irq %d\n",
irqwait->request.irq);
return -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 -EINVAL;
}
if (irqwait->request.type & VIA_IRQ_SIGNAL) {
DRM_ERROR("Signals on Via IRQs not implemented yet.\n");
return -EINVAL;
}
force_sequence = (irqwait->request.type & VIA_IRQ_FORCE_SEQUENCE);
ret = via_driver_irq_wait(dev, irqwait->request.irq, force_sequence,
&irqwait->request.sequence);
microtime(&now);
irqwait->reply.tval_sec = now.tv_sec;
irqwait->reply.tval_usec = now.tv_usec;
return ret;
}
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