/*
* Copyright 2008 Advanced Micro Devices, Inc.
* Copyright 2008 Red Hat Inc.
* Copyright 2009 Jerome Glisse.
*
* 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 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
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Dave Airlie
* Alex Deucher
* Jerome Glisse
*/
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/radeon_drm.h>
#include "radeon_reg.h"
#include "radeon.h"
#include "atom.h"
#include <linux/pm_runtime.h>
#define RADEON_WAIT_IDLE_TIMEOUT 200
/**
* radeon_driver_irq_handler_kms - irq handler for KMS
*
* @int irq, void *arg: args
*
* This is the irq handler for the radeon KMS driver (all asics).
* radeon_irq_process is a macro that points to the per-asic
* irq handler callback.
*/
irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg)
{
struct drm_device *dev = (struct drm_device *) arg;
struct radeon_device *rdev = dev->dev_private;
irqreturn_t ret;
ret = radeon_irq_process(rdev);
if (ret == IRQ_HANDLED)
pm_runtime_mark_last_busy(dev->dev);
return ret;
}
/*
* Handle hotplug events outside the interrupt handler proper.
*/
/**
* radeon_hotplug_work_func - display hotplug work handler
*
* @work: work struct
*
* This is the hot plug event work handler (all asics).
* The work gets scheduled from the irq handler if there
* was a hot plug interrupt. It walks the connector table
* and calls the hotplug handler for each one, then sends
* a drm hotplug event to alert userspace.
*/
static void radeon_hotplug_work_func(struct work_struct *work)
{
struct radeon_device *rdev = container_of(work, struct radeon_device,
hotplug_work);
struct drm_device *dev = rdev->ddev;
struct drm_mode_config *mode_config = &dev->mode_config;
struct drm_connector *connector;
if (mode_config->num_connector) {
list_for_each_entry(connector, &mode_config->connector_list, head)
radeon_connector_hotplug(connector);
}
/* Just fire off a uevent and let userspace tell us what to do */
drm_helper_hpd_irq_event(dev);
}
/**
* radeon_driver_irq_preinstall_kms - drm irq preinstall callback
*
* @dev: drm dev pointer
*
* Gets the hw ready to enable irqs (all asics).
* This function disables all interrupt sources on the GPU.
*/
void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
{
struct radeon_device *rdev = dev->dev_private;
unsigned long irqflags;
unsigned i;
spin_lock_irqsave(&rdev->irq.lock, irqflags);
/* Disable *all* interrupts */
for (i = 0; i < RADEON_NUM_RINGS; i++)
atomic_set(&rdev->irq.ring_int[i], 0);
rdev->irq.dpm_thermal = false;
for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
rdev->irq.hpd[i] = false;
for (i = 0; i < RADEON_MAX_CRTCS; i++) {
rdev->irq.crtc_vblank_int[i] = false;
atomic_set(&rdev->irq.pflip[i], 0);
rdev->irq.afmt[i] = false;
}
radeon_irq_set(rdev);
spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
/* Clear bits */
radeon_irq_process(rdev);
}
/**
* radeon_driver_irq_postinstall_kms - drm irq preinstall callback
*
* @dev: drm dev pointer
*
* Handles stuff to be done after enabling irqs (all asics).
* Returns 0 on success.
*/
int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
{
dev->max_vblank_count = 0x001fffff;
return 0;
}
/**
* radeon_driver_irq_uninstall_kms - drm irq uninstall callback
*
* @dev: drm dev pointer
*
* This function disables all interrupt sources on the GPU (all asics).
*/
void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
{
struct radeon_device *rdev = dev->dev_private;
unsigned long irqflags;
unsigned i;
if (rdev == NULL) {
return;
}
spin_lock_irqsave(&rdev->irq.lock, irqflags);
/* Disable *all* interrupts */
for (i = 0; i < RADEON_NUM_RINGS; i++)
atomic_set(&rdev->irq.ring_int[i], 0);
rdev->irq.dpm_thermal = false;
for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
rdev->irq.hpd[i] = false;
for (i = 0; i < RADEON_MAX_CRTCS; i++) {
rdev->irq.crtc_vblank_int[i] = false;
atomic_set(&rdev->irq.pflip[i], 0);
rdev->irq.afmt[i] = false;
}
radeon_irq_set(rdev);
spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
/**
* radeon_msi_ok - asic specific msi checks
*
* @rdev: radeon device pointer
*
* Handles asic specific MSI checks to determine if
* MSIs should be enabled on a particular chip (all asics).
* Returns true if MSIs should be enabled, false if MSIs
* should not be enabled.
*/
static bool radeon_msi_ok(struct radeon_device *rdev)
{
/* RV370/RV380 was first asic with MSI support */
if (rdev->family < CHIP_RV380)
return false;
/* MSIs don't work on AGP */
if (rdev->flags & RADEON_IS_AGP)
return false;
/*
* Older chips have a HW limitation, they can only generate 40 bits
* of address for "64-bit" MSIs which breaks on some platforms, notably
* IBM POWER servers, so we limit them
*/
if (rdev->family < CHIP_BONAIRE) {
dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
rdev->pdev->no_64bit_msi = 1;
}
/* force MSI on */
if (radeon_msi == 1)
return true;
else if (radeon_msi == 0)
return false;
/* Quirks */
/* HP RS690 only seems to work with MSIs. */
if ((rdev->pdev->device == 0x791f) &&
(rdev->pdev->subsystem_vendor == 0x103c) &&
(rdev->pdev->subsystem_device == 0x30c2))
return true;
/* Dell RS690 only seems to work with MSIs. */
if ((rdev->pdev->device == 0x791f) &&
(rdev->pdev->subsystem_vendor == 0x1028) &&
(rdev->pdev->subsystem_device == 0x01fc))
return true;
/* Dell RS690 only seems to work with MSIs. */
if ((rdev->pdev->device == 0x791f) &&
(rdev->pdev->subsystem_vendor == 0x1028) &&
(rdev->pdev->subsystem_device == 0x01fd))
return true;
/* Gateway RS690 only seems to work with MSIs. */
if ((rdev->pdev->device == 0x791f) &&
(rdev->pdev->subsystem_vendor == 0x107b) &&
(rdev->pdev->subsystem_device == 0x0185))
return true;
/* try and enable MSIs by default on all RS690s */
if (rdev->family == CHIP_RS690)
return true;
/* RV515 seems to have MSI issues where it loses
* MSI rearms occasionally. This leads to lockups and freezes.
* disable it by default.
*/
if (rdev->family == CHIP_RV515)
return false;
if (rdev->flags & RADEON_IS_IGP) {
/* APUs work fine with MSIs */
if (rdev->family >= CHIP_PALM)
return true;
/* lots of IGPs have problems with MSIs */
return false;
}
return true;
}
/**
* radeon_irq_kms_init - init driver interrupt info
*
* @rdev: radeon device pointer
*
* Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
* Returns 0 for success, error for failure.
*/
int radeon_irq_kms_init(struct radeon_device *rdev)
{
int r = 0;
spin_lock_init(&rdev->irq.lock);
r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
if (r) {
return r;
}
/* enable msi */
rdev->msi_enabled = 0;
if (radeon_msi_ok(rdev)) {
int ret = pci_enable_msi(rdev->pdev);
if (!ret) {
rdev->msi_enabled = 1;
dev_info(rdev->dev, "radeon: using MSI.\n");
}
}
INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
rdev->irq.installed = true;
r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);
if (r) {
rdev->irq.installed = false;
flush_work(&rdev->hotplug_work);
return r;
}
DRM_INFO("radeon: irq initialized.\n");
return 0;
}
/**
* radeon_irq_kms_fini - tear down driver interrupt info
*
* @rdev: radeon device pointer
*
* Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
*/
void radeon_irq_kms_fini(struct radeon_device *rdev)
{
drm_vblank_cleanup(rdev->ddev);
if (rdev->irq.installed) {
drm_irq_uninstall(rdev->ddev);
rdev->irq.installed = false;
if (rdev->msi_enabled)
pci_disable_msi(rdev->pdev);
flush_work(&rdev->hotplug_work);
}
}
/**
* radeon_irq_kms_sw_irq_get - enable software interrupt
*
* @rdev: radeon device pointer
* @ring: ring whose interrupt you want to enable
*
* Enables the software interrupt for a specific ring (all asics).
* The software interrupt is generally used to signal a fence on
* a particular ring.
*/
void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
{
unsigned long irqflags;
if (!rdev->ddev->irq_enabled)
return;
if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
spin_lock_irqsave(&rdev->irq.lock, irqflags);
radeon_irq_set(rdev);
spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
}
/**
* radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
*
* @rdev: radeon device pointer
* @ring: ring whose interrupt you want to enable
*
* Enables the software interrupt for a specific ring (all asics).
* The software interrupt is generally used to signal a fence on
* a particular ring.
*/
bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
{
return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
}
/**
* radeon_irq_kms_sw_irq_put - disable software interrupt
*
* @rdev: radeon device pointer
* @ring: ring whose interrupt you want to disable
*
* Disables the software interrupt for a specific ring (all asics).
* The software interrupt is generally used to signal a fence on
* a particular ring.
*/
void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
{
unsigned long irqflags;
if (!rdev->ddev->irq_enabled)
return;
if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
spin_lock_irqsave(&rdev->irq.lock, irqflags);
radeon_irq_set(rdev);
spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
}
/**
* radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
*
* @rdev: radeon device pointer
* @crtc: crtc whose interrupt you want to enable
*
* Enables the pageflip interrupt for a specific crtc (all asics).
* For pageflips we use the vblank interrupt source.
*/
void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
{
unsigned long irqflags;
if (crtc < 0 || crtc >= rdev->num_crtc)
return;
if (!rdev->ddev->irq_enabled)
return;
if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
spin_lock_irqsave(&rdev->irq.lock, irqflags);
radeon_irq_set(rdev);
spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
}
/**
* radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
*
* @rdev: radeon device pointer
* @crtc: crtc whose interrupt you want to disable
*
* Disables the pageflip interrupt for a specific crtc (all asics).
* For pageflips we use the vblank interrupt source.
*/
void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
{
unsigned long irqflags;
if (crtc < 0 || crtc >= rdev->num_crtc)
return;
if (!rdev->ddev->irq_enabled)
return;
if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
spin_lock_irqsave(&rdev->irq.lock, irqflags);
radeon_irq_set(rdev);
spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
}
/**
* radeon_irq_kms_enable_afmt - enable audio format change interrupt
*
* @rdev: radeon device pointer
* @block: afmt block whose interrupt you want to enable
*
* Enables the afmt change interrupt for a specific afmt block (all asics).
*/
void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
{
unsigned long irqflags;
if (!rdev->ddev->irq_enabled)
return;
spin_lock_irqsave(&rdev->irq.lock, irqflags);
rdev->irq.afmt[block] = true;
radeon_irq_set(rdev);
spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
/**
* radeon_irq_kms_disable_afmt - disable audio format change interrupt
*
* @rdev: radeon device pointer
* @block: afmt block whose interrupt you want to disable
*
* Disables the afmt change interrupt for a specific afmt block (all asics).
*/
void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
{
unsigned long irqflags;
if (!rdev->ddev->irq_enabled)
return;
spin_lock_irqsave(&rdev->irq.lock, irqflags);
rdev->irq.afmt[block] = false;
radeon_irq_set(rdev);
spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
/**
* radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
*
* @rdev: radeon device pointer
* @hpd_mask: mask of hpd pins you want to enable.
*
* Enables the hotplug detect interrupt for a specific hpd pin (all asics).
*/
void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
{
unsigned long irqflags;
int i;
if (!rdev->ddev->irq_enabled)
return;
spin_lock_irqsave(&rdev->irq.lock, irqflags);
for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
radeon_irq_set(rdev);
spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
/**
* radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
*
* @rdev: radeon device pointer
* @hpd_mask: mask of hpd pins you want to disable.
*
* Disables the hotplug detect interrupt for a specific hpd pin (all asics).
*/
void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
{
unsigned long irqflags;
int i;
if (!rdev->ddev->irq_enabled)
return;
spin_lock_irqsave(&rdev->irq.lock, irqflags);
for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
radeon_irq_set(rdev);
spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
