/* * 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
*/
/* * 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.
*/ staticvoid 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);
}
/** * 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.
*/ staticbool radeon_msi_ok(struct radeon_device *rdev)
{ /* RV370/RV380 was first asic with MSI support */ if (rdev->family < CHIP_RV380) returnfalse;
/* MSIs don't work on AGP */ if (rdev->flags & RADEON_IS_AGP) returnfalse;
/* * 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) returntrue; elseif (radeon_msi == 0) returnfalse;
/* Quirks */ /* HP RS690 only seems to work with MSIs. */ if ((rdev->pdev->device == 0x791f) &&
(rdev->pdev->subsystem_vendor == 0x103c) &&
(rdev->pdev->subsystem_device == 0x30c2)) returntrue;
/* Dell RS690 only seems to work with MSIs. */ if ((rdev->pdev->device == 0x791f) &&
(rdev->pdev->subsystem_vendor == 0x1028) &&
(rdev->pdev->subsystem_device == 0x01fc)) returntrue;
/* Dell RS690 only seems to work with MSIs. */ if ((rdev->pdev->device == 0x791f) &&
(rdev->pdev->subsystem_vendor == 0x1028) &&
(rdev->pdev->subsystem_device == 0x01fd)) returntrue;
/* Gateway RS690 only seems to work with MSIs. */ if ((rdev->pdev->device == 0x791f) &&
(rdev->pdev->subsystem_vendor == 0x107b) &&
(rdev->pdev->subsystem_device == 0x0185)) returntrue;
/* try and enable MSIs by default on all RS690s */ if (rdev->family == CHIP_RS690) returntrue;
/* 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) returnfalse; if (rdev->flags & RADEON_IS_IGP) { /* APUs work fine with MSIs */ if (rdev->family >= CHIP_PALM) returntrue; /* lots of IGPs have problems with MSIs */ returnfalse;
}
returntrue;
}
/** * 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;
/** * 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)
{ unsignedlong 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)
{ unsignedlong 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)
{ unsignedlong 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)
{ unsignedlong 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)
{ unsignedlong 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)
{ unsignedlong 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)
{ unsignedlong 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, constchar *name, unsigned n)
{
u32 tmp = RREG32(reg);
/* Interrupt state didn't change */ if (!!(tmp & mask) == enable) return;
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