mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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152 lines
3.9 KiB
C
152 lines
3.9 KiB
C
/*
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* Copyright (C) 2006 Ben Skeggs.
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*
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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/*
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* Authors:
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* Ben Skeggs <darktama@iinet.net.au>
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*/
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#include "drmP.h"
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#include "drm.h"
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#include "nouveau_drm.h"
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#include "nouveau_drv.h"
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#include "nouveau_reg.h"
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#include "nouveau_ramht.h"
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#include "nouveau_util.h"
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void
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nouveau_irq_preinstall(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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/* Master disable */
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nv_wr32(dev, NV03_PMC_INTR_EN_0, 0);
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INIT_LIST_HEAD(&dev_priv->vbl_waiting);
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}
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int
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nouveau_irq_postinstall(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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/* Master enable */
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nv_wr32(dev, NV03_PMC_INTR_EN_0, NV_PMC_INTR_EN_0_MASTER_ENABLE);
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if (dev_priv->msi_enabled)
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nv_wr08(dev, 0x00088068, 0xff);
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return 0;
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}
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void
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nouveau_irq_uninstall(struct drm_device *dev)
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{
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/* Master disable */
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nv_wr32(dev, NV03_PMC_INTR_EN_0, 0);
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}
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irqreturn_t
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nouveau_irq_handler(DRM_IRQ_ARGS)
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{
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struct drm_device *dev = (struct drm_device *)arg;
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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unsigned long flags;
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u32 stat;
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int i;
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stat = nv_rd32(dev, NV03_PMC_INTR_0);
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if (stat == 0 || stat == ~0)
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return IRQ_NONE;
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spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
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for (i = 0; i < 32 && stat; i++) {
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if (!(stat & (1 << i)) || !dev_priv->irq_handler[i])
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continue;
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dev_priv->irq_handler[i](dev);
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stat &= ~(1 << i);
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}
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if (dev_priv->msi_enabled)
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nv_wr08(dev, 0x00088068, 0xff);
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spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
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if (stat && nouveau_ratelimit())
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NV_ERROR(dev, "PMC - unhandled INTR 0x%08x\n", stat);
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return IRQ_HANDLED;
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}
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int
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nouveau_irq_init(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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int ret;
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if (nouveau_msi != 0 && dev_priv->card_type >= NV_50) {
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ret = pci_enable_msi(dev->pdev);
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if (ret == 0) {
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NV_INFO(dev, "enabled MSI\n");
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dev_priv->msi_enabled = true;
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}
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}
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return drm_irq_install(dev);
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}
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void
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nouveau_irq_fini(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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drm_irq_uninstall(dev);
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if (dev_priv->msi_enabled)
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pci_disable_msi(dev->pdev);
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}
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void
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nouveau_irq_register(struct drm_device *dev, int status_bit,
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void (*handler)(struct drm_device *))
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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unsigned long flags;
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spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
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dev_priv->irq_handler[status_bit] = handler;
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spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
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}
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void
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nouveau_irq_unregister(struct drm_device *dev, int status_bit)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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unsigned long flags;
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spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
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dev_priv->irq_handler[status_bit] = NULL;
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spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
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}
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