diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_irq.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_irq.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_irq.c b/drivers/gpu/drm/nouveau/nouveau_irq.c new file mode 100644 index 00000000..868c7fd7 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nouveau_irq.c @@ -0,0 +1,151 @@ +/* + * Copyright (C) 2006 Ben Skeggs. + * + * All Rights Reserved. + * + * 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 (including the + * next paragraph) 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 OWNER(S) AND/OR ITS SUPPLIERS 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: + * Ben Skeggs <darktama@iinet.net.au> + */ + +#include "drmP.h" +#include "drm.h" +#include "nouveau_drm.h" +#include "nouveau_drv.h" +#include "nouveau_reg.h" +#include "nouveau_ramht.h" +#include "nouveau_util.h" + +void +nouveau_irq_preinstall(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + + /* Master disable */ + nv_wr32(dev, NV03_PMC_INTR_EN_0, 0); + + INIT_LIST_HEAD(&dev_priv->vbl_waiting); +} + +int +nouveau_irq_postinstall(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + + /* Master enable */ + nv_wr32(dev, NV03_PMC_INTR_EN_0, NV_PMC_INTR_EN_0_MASTER_ENABLE); + if (dev_priv->msi_enabled) + nv_wr08(dev, 0x00088068, 0xff); + + return 0; +} + +void +nouveau_irq_uninstall(struct drm_device *dev) +{ + /* Master disable */ + nv_wr32(dev, NV03_PMC_INTR_EN_0, 0); +} + +irqreturn_t +nouveau_irq_handler(DRM_IRQ_ARGS) +{ + struct drm_device *dev = (struct drm_device *)arg; + struct drm_nouveau_private *dev_priv = dev->dev_private; + unsigned long flags; + u32 stat; + int i; + + stat = nv_rd32(dev, NV03_PMC_INTR_0); + if (stat == 0 || stat == ~0) + return IRQ_NONE; + + spin_lock_irqsave(&dev_priv->context_switch_lock, flags); + for (i = 0; i < 32 && stat; i++) { + if (!(stat & (1 << i)) || !dev_priv->irq_handler[i]) + continue; + + dev_priv->irq_handler[i](dev); + stat &= ~(1 << i); + } + + if (dev_priv->msi_enabled) + nv_wr08(dev, 0x00088068, 0xff); + spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags); + + if (stat && nouveau_ratelimit()) + NV_ERROR(dev, "PMC - unhandled INTR 0x%08x\n", stat); + return IRQ_HANDLED; +} + +int +nouveau_irq_init(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + int ret; + + if (nouveau_msi != 0 && dev_priv->card_type >= NV_50) { + ret = pci_enable_msi(dev->pdev); + if (ret == 0) { + NV_INFO(dev, "enabled MSI\n"); + dev_priv->msi_enabled = true; + } + } + + return drm_irq_install(dev); +} + +void +nouveau_irq_fini(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + + drm_irq_uninstall(dev); + if (dev_priv->msi_enabled) + pci_disable_msi(dev->pdev); +} + +void +nouveau_irq_register(struct drm_device *dev, int status_bit, + void (*handler)(struct drm_device *)) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + unsigned long flags; + + spin_lock_irqsave(&dev_priv->context_switch_lock, flags); + dev_priv->irq_handler[status_bit] = handler; + spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags); +} + +void +nouveau_irq_unregister(struct drm_device *dev, int status_bit) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + unsigned long flags; + + spin_lock_irqsave(&dev_priv->context_switch_lock, flags); + dev_priv->irq_handler[status_bit] = NULL; + spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags); +} |