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8ba8209fef
This patch activates the rebuilding of the gtt. Currently we reinitialize the gtt by inserting the stolen pages again and map the rest to our scratch page. Then we go about restoring the needed ranges. This is a bit overkill but right now we don't have that much to restore so better safe than sorry. Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
318 lines
8.7 KiB
C
318 lines
8.7 KiB
C
/**************************************************************************
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* Copyright (c) 2009-2011, Intel Corporation.
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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 a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Benjamin Defnet <benjamin.r.defnet@intel.com>
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* Rajesh Poornachandran <rajesh.poornachandran@intel.com>
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* Massively reworked
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* Alan Cox <alan@linux.intel.com>
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*/
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#include "power.h"
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#include "psb_drv.h"
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#include "psb_reg.h"
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#include "psb_intel_reg.h"
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#include <linux/mutex.h>
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#include <linux/pm_runtime.h>
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static struct mutex power_mutex; /* Serialize power ops */
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static spinlock_t power_ctrl_lock; /* Serialize power claim */
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/**
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* gma_power_init - initialise power manager
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* @dev: our device
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*
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* Set up for power management tracking of our hardware.
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*/
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void gma_power_init(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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/* FIXME: Move APM/OSPM base into relevant device code */
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dev_priv->apm_base = dev_priv->apm_reg & 0xffff;
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dev_priv->ospm_base &= 0xffff;
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dev_priv->display_power = true; /* We start active */
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dev_priv->display_count = 0; /* Currently no users */
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dev_priv->suspended = false; /* And not suspended */
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spin_lock_init(&power_ctrl_lock);
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mutex_init(&power_mutex);
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if (dev_priv->ops->init_pm)
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dev_priv->ops->init_pm(dev);
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}
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/**
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* gma_power_uninit - end power manager
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* @dev: device to end for
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*
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* Undo the effects of gma_power_init
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*/
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void gma_power_uninit(struct drm_device *dev)
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{
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pm_runtime_disable(&dev->pdev->dev);
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pm_runtime_set_suspended(&dev->pdev->dev);
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}
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/**
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* gma_suspend_display - suspend the display logic
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* @dev: our DRM device
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*
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* Suspend the display logic of the graphics interface
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*/
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static void gma_suspend_display(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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if (dev_priv->suspended)
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return;
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dev_priv->ops->save_regs(dev);
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dev_priv->ops->power_down(dev);
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dev_priv->display_power = false;
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}
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/**
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* gma_resume_display - resume display side logic
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*
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* Resume the display hardware restoring state and enabling
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* as necessary.
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*/
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static void gma_resume_display(struct pci_dev *pdev)
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{
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struct drm_device *dev = pci_get_drvdata(pdev);
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struct drm_psb_private *dev_priv = dev->dev_private;
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/* turn on the display power island */
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dev_priv->ops->power_up(dev);
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dev_priv->suspended = false;
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dev_priv->display_power = true;
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PSB_WVDC32(dev_priv->pge_ctl | _PSB_PGETBL_ENABLED, PSB_PGETBL_CTL);
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pci_write_config_word(pdev, PSB_GMCH_CTRL,
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dev_priv->gmch_ctrl | _PSB_GMCH_ENABLED);
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psb_gtt_restore(dev); /* Rebuild our GTT mappings */
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dev_priv->ops->restore_regs(dev);
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}
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/**
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* gma_suspend_pci - suspend PCI side
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* @pdev: PCI device
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*
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* Perform the suspend processing on our PCI device state
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*/
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static void gma_suspend_pci(struct pci_dev *pdev)
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{
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struct drm_device *dev = pci_get_drvdata(pdev);
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struct drm_psb_private *dev_priv = dev->dev_private;
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int bsm, vbt;
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if (dev_priv->suspended)
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return;
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pci_save_state(pdev);
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pci_read_config_dword(pdev, 0x5C, &bsm);
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dev_priv->regs.saveBSM = bsm;
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pci_read_config_dword(pdev, 0xFC, &vbt);
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dev_priv->regs.saveVBT = vbt;
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pci_read_config_dword(pdev, PSB_PCIx_MSI_ADDR_LOC, &dev_priv->msi_addr);
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pci_read_config_dword(pdev, PSB_PCIx_MSI_DATA_LOC, &dev_priv->msi_data);
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pci_disable_device(pdev);
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pci_set_power_state(pdev, PCI_D3hot);
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dev_priv->suspended = true;
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}
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/**
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* gma_resume_pci - resume helper
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* @dev: our PCI device
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*
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* Perform the resume processing on our PCI device state - rewrite
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* register state and re-enable the PCI device
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*/
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static bool gma_resume_pci(struct pci_dev *pdev)
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{
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struct drm_device *dev = pci_get_drvdata(pdev);
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struct drm_psb_private *dev_priv = dev->dev_private;
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int ret;
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if (!dev_priv->suspended)
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return true;
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pci_set_power_state(pdev, PCI_D0);
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pci_restore_state(pdev);
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pci_write_config_dword(pdev, 0x5c, dev_priv->regs.saveBSM);
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pci_write_config_dword(pdev, 0xFC, dev_priv->regs.saveVBT);
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/* restoring MSI address and data in PCIx space */
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pci_write_config_dword(pdev, PSB_PCIx_MSI_ADDR_LOC, dev_priv->msi_addr);
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pci_write_config_dword(pdev, PSB_PCIx_MSI_DATA_LOC, dev_priv->msi_data);
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ret = pci_enable_device(pdev);
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if (ret != 0)
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dev_err(&pdev->dev, "pci_enable failed: %d\n", ret);
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else
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dev_priv->suspended = false;
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return !dev_priv->suspended;
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}
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/**
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* gma_power_suspend - bus callback for suspend
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* @pdev: our PCI device
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* @state: suspend type
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*
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* Called back by the PCI layer during a suspend of the system. We
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* perform the necessary shut down steps and save enough state that
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* we can undo this when resume is called.
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*/
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int gma_power_suspend(struct device *_dev)
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{
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struct pci_dev *pdev = container_of(_dev, struct pci_dev, dev);
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struct drm_device *dev = pci_get_drvdata(pdev);
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struct drm_psb_private *dev_priv = dev->dev_private;
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mutex_lock(&power_mutex);
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if (!dev_priv->suspended) {
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if (dev_priv->display_count) {
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mutex_unlock(&power_mutex);
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dev_err(dev->dev, "GPU hardware busy, cannot suspend\n");
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return -EBUSY;
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}
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psb_irq_uninstall(dev);
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gma_suspend_display(dev);
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gma_suspend_pci(pdev);
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}
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mutex_unlock(&power_mutex);
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return 0;
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}
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/**
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* gma_power_resume - resume power
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* @pdev: PCI device
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*
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* Resume the PCI side of the graphics and then the displays
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*/
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int gma_power_resume(struct device *_dev)
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{
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struct pci_dev *pdev = container_of(_dev, struct pci_dev, dev);
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struct drm_device *dev = pci_get_drvdata(pdev);
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mutex_lock(&power_mutex);
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gma_resume_pci(pdev);
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gma_resume_display(pdev);
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psb_irq_preinstall(dev);
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psb_irq_postinstall(dev);
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mutex_unlock(&power_mutex);
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return 0;
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}
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/**
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* gma_power_is_on - returne true if power is on
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* @dev: our DRM device
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*
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* Returns true if the display island power is on at this moment
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*/
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bool gma_power_is_on(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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return dev_priv->display_power;
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}
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/**
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* gma_power_begin - begin requiring power
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* @dev: our DRM device
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* @force_on: true to force power on
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*
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* Begin an action that requires the display power island is enabled.
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* We refcount the islands.
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*/
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bool gma_power_begin(struct drm_device *dev, bool force_on)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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int ret;
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unsigned long flags;
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spin_lock_irqsave(&power_ctrl_lock, flags);
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/* Power already on ? */
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if (dev_priv->display_power) {
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dev_priv->display_count++;
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pm_runtime_get(&dev->pdev->dev);
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spin_unlock_irqrestore(&power_ctrl_lock, flags);
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return true;
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}
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if (force_on == false)
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goto out_false;
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/* Ok power up needed */
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ret = gma_resume_pci(dev->pdev);
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if (ret == 0) {
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psb_irq_preinstall(dev);
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psb_irq_postinstall(dev);
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pm_runtime_get(&dev->pdev->dev);
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dev_priv->display_count++;
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spin_unlock_irqrestore(&power_ctrl_lock, flags);
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return true;
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}
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out_false:
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spin_unlock_irqrestore(&power_ctrl_lock, flags);
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return false;
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}
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/**
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* gma_power_end - end use of power
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* @dev: Our DRM device
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*
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* Indicate that one of our gma_power_begin() requested periods when
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* the diplay island power is needed has completed.
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*/
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void gma_power_end(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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unsigned long flags;
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spin_lock_irqsave(&power_ctrl_lock, flags);
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dev_priv->display_count--;
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WARN_ON(dev_priv->display_count < 0);
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spin_unlock_irqrestore(&power_ctrl_lock, flags);
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pm_runtime_put(&dev->pdev->dev);
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}
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int psb_runtime_suspend(struct device *dev)
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{
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return gma_power_suspend(dev);
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}
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int psb_runtime_resume(struct device *dev)
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{
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return gma_power_resume(dev);
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}
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int psb_runtime_idle(struct device *dev)
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{
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struct drm_device *drmdev = pci_get_drvdata(to_pci_dev(dev));
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struct drm_psb_private *dev_priv = drmdev->dev_private;
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if (dev_priv->display_count)
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return 0;
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else
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return 1;
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}
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