| /* |
| * 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; |
| |
| mutex_lock(&mode_config->mutex); |
| if (mode_config->num_connector) { |
| 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->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) |
| { |
| struct radeon_device *rdev = dev->dev_private; |
| |
| if (ASIC_IS_AVIVO(rdev)) |
| dev->max_vblank_count = 0x00ffffff; |
| else |
| 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); |
| } |
| |