diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_irq_kms.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_irq_kms.c | 616 |
1 files changed, 616 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c new file mode 100644 index 000000000..6541c1f6f --- /dev/null +++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c @@ -0,0 +1,616 @@ +/* + * 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_crtc_helper.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->ddev; + 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->ddev; + 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 = 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). + */ +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->ddev; + 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->ddev; + 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 == 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); + + /* Disable vblank irqs aggressively for power-saving */ + rdev->ddev->vblank_disable_immediate = true; + + 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_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); + } +} |