615 lines
17 KiB
C
615 lines
17 KiB
C
/*
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* Copyright 2008 Advanced Micro Devices, Inc.
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* Copyright 2008 Red Hat Inc.
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* Copyright 2009 Jerome Glisse.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Dave Airlie
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* Alex Deucher
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* Jerome Glisse
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*/
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#include <linux/pci.h>
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#include <linux/pm_runtime.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_device.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_vblank.h>
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#include <drm/radeon_drm.h>
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#include "atom.h"
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#include "radeon.h"
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#include "radeon_kms.h"
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#include "radeon_reg.h"
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#define RADEON_WAIT_IDLE_TIMEOUT 200
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/*
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* radeon_driver_irq_handler_kms - irq handler for KMS
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*
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* This is the irq handler for the radeon KMS driver (all asics).
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* radeon_irq_process is a macro that points to the per-asic
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* irq handler callback.
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*/
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static irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg)
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{
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struct drm_device *dev = (struct drm_device *) arg;
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struct radeon_device *rdev = dev->dev_private;
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irqreturn_t ret;
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ret = radeon_irq_process(rdev);
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if (ret == IRQ_HANDLED)
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pm_runtime_mark_last_busy(dev->dev);
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return ret;
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}
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/*
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* Handle hotplug events outside the interrupt handler proper.
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*/
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/**
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* radeon_hotplug_work_func - display hotplug work handler
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*
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* @work: work struct
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*
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* This is the hot plug event work handler (all asics).
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* The work gets scheduled from the irq handler if there
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* was a hot plug interrupt. It walks the connector table
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* and calls the hotplug handler for each one, then sends
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* a drm hotplug event to alert userspace.
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*/
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static void radeon_hotplug_work_func(struct work_struct *work)
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{
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struct radeon_device *rdev = container_of(work, struct radeon_device,
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hotplug_work.work);
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struct drm_device *dev = rdev->ddev;
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struct drm_mode_config *mode_config = &dev->mode_config;
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struct drm_connector *connector;
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/* we can race here at startup, some boards seem to trigger
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* hotplug irqs when they shouldn't. */
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if (!rdev->mode_info.mode_config_initialized)
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return;
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mutex_lock(&mode_config->mutex);
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list_for_each_entry(connector, &mode_config->connector_list, head)
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radeon_connector_hotplug(connector);
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mutex_unlock(&mode_config->mutex);
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/* Just fire off a uevent and let userspace tell us what to do */
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drm_helper_hpd_irq_event(dev);
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}
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static void radeon_dp_work_func(struct work_struct *work)
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{
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struct radeon_device *rdev = container_of(work, struct radeon_device,
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dp_work);
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struct drm_device *dev = rdev->ddev;
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struct drm_mode_config *mode_config = &dev->mode_config;
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struct drm_connector *connector;
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/* this should take a mutex */
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list_for_each_entry(connector, &mode_config->connector_list, head)
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radeon_connector_hotplug(connector);
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}
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/**
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* radeon_driver_irq_preinstall_kms - drm irq preinstall callback
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*
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* @dev: drm dev pointer
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*
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* Gets the hw ready to enable irqs (all asics).
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* This function disables all interrupt sources on the GPU.
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*/
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static void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
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{
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struct radeon_device *rdev = dev->dev_private;
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unsigned long irqflags;
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unsigned i;
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spin_lock_irqsave(&rdev->irq.lock, irqflags);
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/* Disable *all* interrupts */
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for (i = 0; i < RADEON_NUM_RINGS; i++)
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atomic_set(&rdev->irq.ring_int[i], 0);
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rdev->irq.dpm_thermal = false;
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for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
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rdev->irq.hpd[i] = false;
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for (i = 0; i < RADEON_MAX_CRTCS; i++) {
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rdev->irq.crtc_vblank_int[i] = false;
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atomic_set(&rdev->irq.pflip[i], 0);
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rdev->irq.afmt[i] = false;
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}
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radeon_irq_set(rdev);
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spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
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/* Clear bits */
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radeon_irq_process(rdev);
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}
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/**
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* radeon_driver_irq_postinstall_kms - drm irq preinstall callback
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*
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* @dev: drm dev pointer
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*
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* Handles stuff to be done after enabling irqs (all asics).
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* Returns 0 on success.
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*/
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static int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
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{
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struct radeon_device *rdev = dev->dev_private;
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if (ASIC_IS_AVIVO(rdev))
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dev->max_vblank_count = 0x00ffffff;
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else
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dev->max_vblank_count = 0x001fffff;
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return 0;
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}
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/**
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* radeon_driver_irq_uninstall_kms - drm irq uninstall callback
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*
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* @dev: drm dev pointer
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*
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* This function disables all interrupt sources on the GPU (all asics).
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*/
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static void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
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{
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struct radeon_device *rdev = dev->dev_private;
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unsigned long irqflags;
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unsigned i;
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if (rdev == NULL) {
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return;
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}
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spin_lock_irqsave(&rdev->irq.lock, irqflags);
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/* Disable *all* interrupts */
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for (i = 0; i < RADEON_NUM_RINGS; i++)
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atomic_set(&rdev->irq.ring_int[i], 0);
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rdev->irq.dpm_thermal = false;
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for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
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rdev->irq.hpd[i] = false;
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for (i = 0; i < RADEON_MAX_CRTCS; i++) {
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rdev->irq.crtc_vblank_int[i] = false;
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atomic_set(&rdev->irq.pflip[i], 0);
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rdev->irq.afmt[i] = false;
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}
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radeon_irq_set(rdev);
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spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
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}
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static int radeon_irq_install(struct radeon_device *rdev, int irq)
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{
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struct drm_device *dev = rdev->ddev;
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int ret;
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if (irq == IRQ_NOTCONNECTED)
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return -ENOTCONN;
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radeon_driver_irq_preinstall_kms(dev);
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/* PCI devices require shared interrupts. */
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ret = request_irq(irq, radeon_driver_irq_handler_kms,
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IRQF_SHARED, dev->driver->name, dev);
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if (ret)
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return ret;
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radeon_driver_irq_postinstall_kms(dev);
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return 0;
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}
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static void radeon_irq_uninstall(struct radeon_device *rdev)
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{
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struct drm_device *dev = rdev->ddev;
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struct pci_dev *pdev = to_pci_dev(dev->dev);
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radeon_driver_irq_uninstall_kms(dev);
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free_irq(pdev->irq, dev);
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}
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/**
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* radeon_msi_ok - asic specific msi checks
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*
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* @rdev: radeon device pointer
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*
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* Handles asic specific MSI checks to determine if
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* MSIs should be enabled on a particular chip (all asics).
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* Returns true if MSIs should be enabled, false if MSIs
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* should not be enabled.
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*/
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static bool radeon_msi_ok(struct radeon_device *rdev)
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{
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/* RV370/RV380 was first asic with MSI support */
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if (rdev->family < CHIP_RV380)
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return false;
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/* MSIs don't work on AGP */
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if (rdev->flags & RADEON_IS_AGP)
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return false;
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/*
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* Older chips have a HW limitation, they can only generate 40 bits
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* of address for "64-bit" MSIs which breaks on some platforms, notably
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* IBM POWER servers, so we limit them
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*/
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if (rdev->family < CHIP_BONAIRE) {
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dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
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rdev->pdev->no_64bit_msi = 1;
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}
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/* force MSI on */
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if (radeon_msi == 1)
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return true;
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else if (radeon_msi == 0)
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return false;
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/* Quirks */
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/* HP RS690 only seems to work with MSIs. */
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if ((rdev->pdev->device == 0x791f) &&
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(rdev->pdev->subsystem_vendor == 0x103c) &&
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(rdev->pdev->subsystem_device == 0x30c2))
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return true;
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/* Dell RS690 only seems to work with MSIs. */
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if ((rdev->pdev->device == 0x791f) &&
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(rdev->pdev->subsystem_vendor == 0x1028) &&
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(rdev->pdev->subsystem_device == 0x01fc))
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return true;
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/* Dell RS690 only seems to work with MSIs. */
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if ((rdev->pdev->device == 0x791f) &&
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(rdev->pdev->subsystem_vendor == 0x1028) &&
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(rdev->pdev->subsystem_device == 0x01fd))
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return true;
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/* Gateway RS690 only seems to work with MSIs. */
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if ((rdev->pdev->device == 0x791f) &&
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(rdev->pdev->subsystem_vendor == 0x107b) &&
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(rdev->pdev->subsystem_device == 0x0185))
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return true;
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/* try and enable MSIs by default on all RS690s */
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if (rdev->family == CHIP_RS690)
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return true;
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/* RV515 seems to have MSI issues where it loses
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* MSI rearms occasionally. This leads to lockups and freezes.
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* disable it by default.
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*/
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if (rdev->family == CHIP_RV515)
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return false;
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if (rdev->flags & RADEON_IS_IGP) {
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/* APUs work fine with MSIs */
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if (rdev->family >= CHIP_PALM)
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return true;
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/* lots of IGPs have problems with MSIs */
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return false;
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}
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return true;
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}
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/**
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* radeon_irq_kms_init - init driver interrupt info
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*
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* @rdev: radeon device pointer
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*
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* Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
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* Returns 0 for success, error for failure.
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*/
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int radeon_irq_kms_init(struct radeon_device *rdev)
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{
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int r = 0;
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spin_lock_init(&rdev->irq.lock);
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/* Disable vblank irqs aggressively for power-saving */
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rdev->ddev->vblank_disable_immediate = true;
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r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
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if (r) {
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return r;
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}
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/* enable msi */
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rdev->msi_enabled = 0;
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if (radeon_msi_ok(rdev)) {
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int ret = pci_enable_msi(rdev->pdev);
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if (!ret) {
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rdev->msi_enabled = 1;
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dev_info(rdev->dev, "radeon: using MSI.\n");
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}
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}
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INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
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INIT_WORK(&rdev->dp_work, radeon_dp_work_func);
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INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
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rdev->irq.installed = true;
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r = radeon_irq_install(rdev, rdev->pdev->irq);
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if (r) {
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rdev->irq.installed = false;
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flush_delayed_work(&rdev->hotplug_work);
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return r;
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}
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DRM_INFO("radeon: irq initialized.\n");
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return 0;
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}
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/**
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* radeon_irq_kms_fini - tear down driver interrupt info
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*
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* @rdev: radeon device pointer
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*
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* Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
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*/
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void radeon_irq_kms_fini(struct radeon_device *rdev)
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{
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if (rdev->irq.installed) {
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radeon_irq_uninstall(rdev);
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rdev->irq.installed = false;
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if (rdev->msi_enabled)
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pci_disable_msi(rdev->pdev);
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flush_delayed_work(&rdev->hotplug_work);
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}
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}
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/**
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* radeon_irq_kms_sw_irq_get - enable software interrupt
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*
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* @rdev: radeon device pointer
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* @ring: ring whose interrupt you want to enable
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*
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* Enables the software interrupt for a specific ring (all asics).
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* The software interrupt is generally used to signal a fence on
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* a particular ring.
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*/
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void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
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{
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unsigned long irqflags;
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if (!rdev->irq.installed)
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return;
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if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
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spin_lock_irqsave(&rdev->irq.lock, irqflags);
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radeon_irq_set(rdev);
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spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
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}
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}
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/**
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* radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
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*
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* @rdev: radeon device pointer
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* @ring: ring whose interrupt you want to enable
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*
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* Enables the software interrupt for a specific ring (all asics).
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* The software interrupt is generally used to signal a fence on
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* a particular ring.
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*/
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bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
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{
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return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
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}
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/**
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* radeon_irq_kms_sw_irq_put - disable software interrupt
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*
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* @rdev: radeon device pointer
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* @ring: ring whose interrupt you want to disable
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*
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* Disables the software interrupt for a specific ring (all asics).
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* The software interrupt is generally used to signal a fence on
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* a particular ring.
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*/
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void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
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{
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unsigned long irqflags;
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if (!rdev->irq.installed)
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return;
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if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
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spin_lock_irqsave(&rdev->irq.lock, irqflags);
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radeon_irq_set(rdev);
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spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
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}
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}
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/**
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* radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
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*
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* @rdev: radeon device pointer
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* @crtc: crtc whose interrupt you want to enable
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*
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* Enables the pageflip interrupt for a specific crtc (all asics).
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* For pageflips we use the vblank interrupt source.
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*/
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void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
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{
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unsigned long irqflags;
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if (crtc < 0 || crtc >= rdev->num_crtc)
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return;
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if (!rdev->irq.installed)
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return;
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if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
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spin_lock_irqsave(&rdev->irq.lock, irqflags);
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radeon_irq_set(rdev);
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spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
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}
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}
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/**
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* radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
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*
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* @rdev: radeon device pointer
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* @crtc: crtc whose interrupt you want to disable
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*
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* Disables the pageflip interrupt for a specific crtc (all asics).
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* For pageflips we use the vblank interrupt source.
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*/
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void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
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{
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unsigned long irqflags;
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if (crtc < 0 || crtc >= rdev->num_crtc)
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return;
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if (!rdev->irq.installed)
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return;
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if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
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spin_lock_irqsave(&rdev->irq.lock, irqflags);
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radeon_irq_set(rdev);
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spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
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}
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}
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/**
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* radeon_irq_kms_enable_afmt - enable audio format change interrupt
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*
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* @rdev: radeon device pointer
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* @block: afmt block whose interrupt you want to enable
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*
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* Enables the afmt change interrupt for a specific afmt block (all asics).
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*/
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void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
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{
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unsigned long irqflags;
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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);
|
|
}
|
|
}
|