--- /dev/null
+/*
+ * 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);
+}
+
+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->ddev;
+ struct drm_mode_config *mode_config = &dev->mode_config;
+ struct drm_connector *connector;
+
+ /* this should take a mutex */
+ if (mode_config->num_connector) {
+ list_for_each_entry(connector, &mode_config->connector_list, head)
+ radeon_connector_hotplug(connector);
+ }
+}
+/**
+ * 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->dp_work, radeon_dp_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);
+}
+
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