/*
* 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 <linux/pci.h>
#include <linux/pm_runtime.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include <drm/radeon_drm.h>
#include "atom.h"
#include "radeon.h"
#include "radeon_kms.h"
#include "radeon_reg.h"
#define RADEON_WAIT_IDLE_TIMEOUT 200
/*
* radeon_driver_irq_handler_kms - irq handler for KMS
*
* 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 .
*/
static 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.work);
struct drm_device *dev = rdev_to_drm(rdev);
struct drm_mode_config *mode_config = &dev->mode_config;
struct drm_connector *connector;
/* we can race here at startup, some boards seem to trigger
* hotplug irqs when they shouldn't. */
if (!rdev->mode_info.mode_config_initialized)
return ;
mutex_lock(&mode_config->mutex);
list_for_each_entry(connector, &mode_config->connector_list, head)
radeon_connector_hotplug(connector);
mutex_unlock(&mode_config->mutex);
/* Just fire off a uevent and let userspace tell us what to do */
drm_helper_hpd_irq_event(dev);
}
static void radeon_dp_work_func(struct work_struct *work)
{
struct radeon_device *rdev = container_of(work, struct radeon_device,
dp_work);
struct drm_device *dev = rdev_to_drm(rdev);
struct drm_mode_config *mode_config = &dev->mode_config;
struct drm_connector *connector;
mutex_lock(&mode_config->mutex);
list_for_each_entry(connector, &mode_config->connector_list, head)
radeon_connector_hotplug(connector);
mutex_unlock(&mode_config->mutex);
}
/**
* 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 .
*/
static 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 .
*/
static int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
{
struct radeon_device *rdev = dev->dev_private;
if (ASIC_IS_AVIVO(rdev))
dev->max_vblank_count = 0 x00ffffff;
else
dev->max_vblank_count = 0 x001fffff;
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 ) .
*/
static 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);
}
static int radeon_irq_install(struct radeon_device *rdev, int irq)
{
struct drm_device *dev = rdev_to_drm(rdev);
int ret;
if (irq == IRQ_NOTCONNECTED)
return -ENOTCONN;
radeon_driver_irq_preinstall_kms(dev);
/* PCI devices require shared interrupts. */
ret = request_irq(irq, radeon_driver_irq_handler_kms,
IRQF_SHARED, dev->driver->name, dev);
if (ret)
return ret;
radeon_driver_irq_postinstall_kms(dev);
return 0 ;
}
static void radeon_irq_uninstall(struct radeon_device *rdev)
{
struct drm_device *dev = rdev_to_drm(rdev);
struct pci_dev *pdev = to_pci_dev(dev->dev);
radeon_driver_irq_uninstall_kms(dev);
free_irq(pdev->irq, dev);
}
/**
* 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 == 0 x791f) &&
(rdev->pdev->subsystem_vendor == 0 x103c) &&
(rdev->pdev->subsystem_device == 0 x30c2))
return true ;
/* Dell RS690 only seems to work with MSIs. */
if ((rdev->pdev->device == 0 x791f) &&
(rdev->pdev->subsystem_vendor == 0 x1028) &&
(rdev->pdev->subsystem_device == 0 x01fc))
return true ;
/* Dell RS690 only seems to work with MSIs. */
if ((rdev->pdev->device == 0 x791f) &&
(rdev->pdev->subsystem_vendor == 0 x1028) &&
(rdev->pdev->subsystem_device == 0 x01fd))
return true ;
/* Gateway RS690 only seems to work with MSIs. */
if ((rdev->pdev->device == 0 x791f) &&
(rdev->pdev->subsystem_vendor == 0 x107b) &&
(rdev->pdev->subsystem_device == 0 x0185))
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);
/* Disable vblank irqs aggressively for power-saving */
rdev_to_drm(rdev)->vblank_disable_immediate = true ;
r = drm_vblank_init(rdev_to_drm(rdev), 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_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
INIT_WORK(&rdev->dp_work, radeon_dp_work_func);
INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
rdev->irq.installed = true ;
r = radeon_irq_install(rdev, rdev->pdev->irq);
if (r) {
rdev->irq.installed = false ;
flush_delayed_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)
{
if (rdev->irq.installed) {
radeon_irq_uninstall(rdev);
rdev->irq.installed = false ;
if (rdev->msi_enabled)
pci_disable_msi(rdev->pdev);
flush_delayed_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->irq.installed)
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->irq.installed)
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->irq.installed)
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->irq.installed)
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->irq.installed)
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->irq.installed)
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->irq.installed)
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->irq.installed)
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_set_irq_n_enabled - helper for updating interrupt enable registers
*
* @ rdev : radeon device pointer
* @ reg : the register to write to enable / disable interrupts
* @ mask : the mask that enables the interrupts
* @ enable : whether to enable or disable the interrupt register
* @ name : the name of the interrupt register to print to the kernel log
* @ n : the number of the interrupt register to print to the kernel log
*
* Helper for updating the enable state of interrupt registers . Checks whether
* or not the interrupt matches the enable state we want . If it doesn ' t , then
* we update it and print a debugging message to the kernel log indicating the
* new state of the interrupt register .
*
* Used for updating sequences of interrupts registers like HPD1 , HPD2 , etc .
*/
void radeon_irq_kms_set_irq_n_enabled(struct radeon_device *rdev,
u32 reg, u32 mask,
bool enable, const char *name, unsigned n)
{
u32 tmp = RREG32(reg);
/* Interrupt state didn't change */
if (!!(tmp & mask) == enable)
return ;
if (enable) {
DRM_DEBUG("%s%d interrupts enabled\n" , name, n);
WREG32(reg, tmp |= mask);
} else {
DRM_DEBUG("%s%d interrupts disabled\n" , name, n);
WREG32(reg, tmp & ~mask);
}
}
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