1 files changed, 345 insertions, 0 deletions

diff --git a/drivers/staging/psb/psb_ttm_glue.c b/drivers/staging/psb/psb_ttm_glue.c
new file mode 100644
index 000000000000..748fc609a2bc
--- /dev/null
+++ b/drivers/staging/psb/psb_ttm_glue.c
@@ -0,0 +1,345 @@
+/**************************************************************************
+ * Copyright (c) 2008, Intel Corporation.
+ * All Rights Reserved.
+ * Copyright (c) 2008, Tungsten Graphics Inc.  Cedar Park, TX., USA.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
+ * develop this driver.
+ *
+ **************************************************************************/
+/*
+ */
+
+#include <drm/drmP.h>
+#include "psb_drv.h"
+#include "ttm/ttm_userobj_api.h"
+
+static struct vm_operations_struct psb_ttm_vm_ops;
+
+int psb_open(struct inode *inode, struct file *filp)
+{
+	struct drm_file *file_priv;
+	struct drm_psb_private *dev_priv;
+	struct psb_fpriv *psb_fp;
+	int ret;
+
+	ret = drm_open(inode, filp);
+	if (unlikely(ret))
+		return ret;
+
+	psb_fp = drm_calloc(1, sizeof(*psb_fp), DRM_MEM_FILES);
+
+	if (unlikely(psb_fp == NULL))
+		goto out_err0;
+
+	file_priv = (struct drm_file *) filp->private_data;
+	dev_priv = psb_priv(file_priv->minor->dev);
+
+
+	psb_fp->tfile = ttm_object_file_init(dev_priv->tdev,
+					     PSB_FILE_OBJECT_HASH_ORDER);
+	if (unlikely(psb_fp->tfile == NULL))
+		goto out_err1;
+
+	file_priv->driver_priv = psb_fp;
+
+	if (unlikely(dev_priv->bdev.dev_mapping == NULL))
+		dev_priv->bdev.dev_mapping = dev_priv->dev->dev_mapping;
+
+	return 0;
+
+out_err1:
+	drm_free(psb_fp, sizeof(*psb_fp), DRM_MEM_FILES);
+out_err0:
+	(void) drm_release(inode, filp);
+	return ret;
+}
+
+int psb_release(struct inode *inode, struct file *filp)
+{
+	struct drm_file *file_priv;
+	struct psb_fpriv *psb_fp;
+	struct drm_psb_private *dev_priv;
+	int ret;
+
+	file_priv = (struct drm_file *) filp->private_data;
+	psb_fp = psb_fpriv(file_priv);
+	dev_priv = psb_priv(file_priv->minor->dev);
+
+	down_read(&dev_priv->sgx_sem);
+	psb_check_power_state(file_priv->minor->dev, PSB_DEVICE_SGX);
+
+	ttm_object_file_release(&psb_fp->tfile);
+	drm_free(psb_fp, sizeof(*psb_fp), DRM_MEM_FILES);
+
+	if (dev_priv && dev_priv->xhw_file)
+		psb_xhw_init_takedown(dev_priv, file_priv, 1);
+
+	ret = drm_release(inode, filp);
+	up_read(&dev_priv->sgx_sem);
+	if (drm_psb_ospm && IS_MRST(dev_priv->dev))
+		schedule_delayed_work(&dev_priv->scheduler.wq, 0);
+	return ret;
+}
+
+int psb_fence_signaled_ioctl(struct drm_device *dev, void *data,
+			     struct drm_file *file_priv)
+{
+	int ret;
+	struct drm_psb_private *dev_priv = psb_priv(dev);
+	down_read(&dev_priv->sgx_sem);
+	psb_check_power_state(dev, PSB_DEVICE_SGX);
+	ret = ttm_fence_signaled_ioctl(psb_fpriv(file_priv)->tfile, data);
+	up_read(&dev_priv->sgx_sem);
+	if (drm_psb_ospm && IS_MRST(dev))
+		schedule_delayed_work(&dev_priv->scheduler.wq, 1);
+	return ret;
+}
+
+int psb_fence_finish_ioctl(struct drm_device *dev, void *data,
+			   struct drm_file *file_priv)
+{
+	int ret;
+	struct drm_psb_private *dev_priv = psb_priv(dev);
+	down_read(&dev_priv->sgx_sem);
+	psb_check_power_state(dev, PSB_DEVICE_SGX);
+	ret = ttm_fence_finish_ioctl(psb_fpriv(file_priv)->tfile, data);
+	up_read(&dev_priv->sgx_sem);
+	if (drm_psb_ospm && IS_MRST(dev))
+		schedule_delayed_work(&dev_priv->scheduler.wq, 1);
+	return ret;
+}
+
+int psb_fence_unref_ioctl(struct drm_device *dev, void *data,
+			  struct drm_file *file_priv)
+{
+	int ret;
+	struct drm_psb_private *dev_priv = psb_priv(dev);
+	down_read(&dev_priv->sgx_sem);
+	psb_check_power_state(dev, PSB_DEVICE_SGX);
+	ret = ttm_fence_unref_ioctl(psb_fpriv(file_priv)->tfile, data);
+	up_read(&dev_priv->sgx_sem);
+	if (drm_psb_ospm && IS_MRST(dev))
+		schedule_delayed_work(&dev_priv->scheduler.wq, 1);
+	return ret;
+}
+
+int psb_pl_waitidle_ioctl(struct drm_device *dev, void *data,
+			  struct drm_file *file_priv)
+{
+	PSB_DEBUG_PM("ioctl: psb_pl_reference\n");
+	return ttm_pl_waitidle_ioctl(psb_fpriv(file_priv)->tfile, data);
+}
+
+int psb_pl_setstatus_ioctl(struct drm_device *dev, void *data,
+			   struct drm_file *file_priv)
+{
+	int ret;
+	struct drm_psb_private *dev_priv = psb_priv(dev);
+	down_read(&dev_priv->sgx_sem);
+	psb_check_power_state(dev, PSB_DEVICE_SGX);
+	ret = ttm_pl_setstatus_ioctl(psb_fpriv(file_priv)->tfile,
+				      &psb_priv(dev)->ttm_lock, data);
+	up_read(&dev_priv->sgx_sem);
+	if (drm_psb_ospm && IS_MRST(dev))
+		schedule_delayed_work(&dev_priv->scheduler.wq, 1);
+	return ret;
+}
+
+int psb_pl_synccpu_ioctl(struct drm_device *dev, void *data,
+			 struct drm_file *file_priv)
+{
+	int ret;
+	struct drm_psb_private *dev_priv = psb_priv(dev);
+	down_read(&dev_priv->sgx_sem);
+	psb_check_power_state(dev, PSB_DEVICE_SGX);
+	ret = ttm_pl_synccpu_ioctl(psb_fpriv(file_priv)->tfile, data);
+	up_read(&dev_priv->sgx_sem);
+	if (drm_psb_ospm && IS_MRST(dev))
+		schedule_delayed_work(&dev_priv->scheduler.wq, 1);
+	return ret;
+}
+
+int psb_pl_unref_ioctl(struct drm_device *dev, void *data,
+		       struct drm_file *file_priv)
+{
+	struct drm_psb_private *dev_priv = psb_priv(dev);
+	int ret;
+	down_read(&dev_priv->sgx_sem);
+	psb_check_power_state(dev, PSB_DEVICE_SGX);
+	ret = ttm_pl_unref_ioctl(psb_fpriv(file_priv)->tfile, data);
+	up_read(&dev_priv->sgx_sem);
+	if (drm_psb_ospm && IS_MRST(dev))
+		schedule_delayed_work(&dev_priv->scheduler.wq, 1);
+	return ret;
+}
+
+int psb_pl_reference_ioctl(struct drm_device *dev, void *data,
+			   struct drm_file *file_priv)
+{
+	struct drm_psb_private *dev_priv = psb_priv(dev);
+	int ret;
+	down_read(&dev_priv->sgx_sem);
+	psb_check_power_state(dev, PSB_DEVICE_SGX);
+	ret = ttm_pl_reference_ioctl(psb_fpriv(file_priv)->tfile, data);
+	up_read(&dev_priv->sgx_sem);
+	if (drm_psb_ospm && IS_MRST(dev))
+		schedule_delayed_work(&dev_priv->scheduler.wq, 1);
+	return ret;
+}
+
+int psb_pl_create_ioctl(struct drm_device *dev, void *data,
+			struct drm_file *file_priv)
+{
+	struct drm_psb_private *dev_priv = psb_priv(dev);
+	int ret;
+	down_read(&dev_priv->sgx_sem);
+	psb_check_power_state(dev, PSB_DEVICE_SGX);
+	ret = ttm_pl_create_ioctl(psb_fpriv(file_priv)->tfile,
+				   &dev_priv->bdev, &dev_priv->ttm_lock, data);
+	up_read(&dev_priv->sgx_sem);
+	if (drm_psb_ospm && IS_MRST(dev))
+		schedule_delayed_work(&dev_priv->scheduler.wq, 1);
+	return ret;
+}
+
+/**
+ * psb_ttm_fault - Wrapper around the ttm fault method.
+ *
+ * @vma: The struct vm_area_struct as in the vm fault() method.
+ * @vmf: The struct vm_fault as in the vm fault() method.
+ *
+ * Since ttm_fault() will reserve buffers while faulting,
+ * we need to take the ttm read lock around it, as this driver
+ * relies on the ttm_lock in write mode to exclude all threads from
+ * reserving and thus validating buffers in aperture- and memory shortage
+ * situations.
+ */
+
+static int psb_ttm_fault(struct vm_area_struct *vma,
+			 struct vm_fault *vmf)
+{
+	struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
+		vma->vm_private_data;
+	struct drm_psb_private *dev_priv =
+		container_of(bo->bdev, struct drm_psb_private, bdev);
+	int ret;
+
+	ret = ttm_read_lock(&dev_priv->ttm_lock, true);
+	if (unlikely(ret != 0))
+		return VM_FAULT_NOPAGE;
+
+	ret = dev_priv->ttm_vm_ops->fault(vma, vmf);
+
+	ttm_read_unlock(&dev_priv->ttm_lock);
+	return ret;
+}
+
+
+int psb_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+	struct drm_file *file_priv;
+	struct drm_psb_private *dev_priv;
+	int ret;
+
+	if (unlikely(vma->vm_pgoff < DRM_PSB_FILE_PAGE_OFFSET))
+		return drm_mmap(filp, vma);
+
+	file_priv = (struct drm_file *) filp->private_data;
+	dev_priv = psb_priv(file_priv->minor->dev);
+
+	ret = ttm_bo_mmap(filp, vma, &dev_priv->bdev);
+	if (unlikely(ret != 0))
+		return ret;
+
+	if (unlikely(dev_priv->ttm_vm_ops == NULL)) {
+		dev_priv->ttm_vm_ops = vma->vm_ops;
+		psb_ttm_vm_ops = *vma->vm_ops;
+		psb_ttm_vm_ops.fault = &psb_ttm_fault;
+	}
+
+	vma->vm_ops = &psb_ttm_vm_ops;
+
+	return 0;
+}
+
+ssize_t psb_ttm_write(struct file *filp, const char __user *buf,
+		      size_t count, loff_t *f_pos)
+{
+	struct drm_file *file_priv = (struct drm_file *)filp->private_data;
+	struct drm_psb_private *dev_priv = psb_priv(file_priv->minor->dev);
+
+	return ttm_bo_io(&dev_priv->bdev, filp, buf, NULL, count, f_pos, 1);
+}
+
+ssize_t psb_ttm_read(struct file *filp, char __user *buf,
+		     size_t count, loff_t *f_pos)
+{
+	struct drm_file *file_priv = (struct drm_file *)filp->private_data;
+	struct drm_psb_private *dev_priv = psb_priv(file_priv->minor->dev);
+
+	return ttm_bo_io(&dev_priv->bdev, filp, NULL, buf, count, f_pos, 1);
+}
+
+int psb_verify_access(struct ttm_buffer_object *bo,
+		      struct file *filp)
+{
+	struct drm_file *file_priv = (struct drm_file *)filp->private_data;
+
+	if (capable(CAP_SYS_ADMIN))
+		return 0;
+
+	if (unlikely(!file_priv->authenticated))
+		return -EPERM;
+
+	return ttm_pl_verify_access(bo, psb_fpriv(file_priv)->tfile);
+}
+
+static int psb_ttm_mem_global_init(struct drm_global_reference *ref)
+{
+	return ttm_mem_global_init(ref->object);
+}
+
+static void psb_ttm_mem_global_release(struct drm_global_reference *ref)
+{
+	ttm_mem_global_release(ref->object);
+}
+
+int psb_ttm_global_init(struct drm_psb_private *dev_priv)
+{
+	struct drm_global_reference *global_ref;
+	int ret;
+
+	global_ref = &dev_priv->mem_global_ref;
+	global_ref->global_type = DRM_GLOBAL_TTM_MEM;
+	global_ref->size = sizeof(struct ttm_mem_global);
+	global_ref->init = &psb_ttm_mem_global_init;
+	global_ref->release = &psb_ttm_mem_global_release;
+
+	ret = drm_global_item_ref(global_ref);
+	if (unlikely(ret != 0)) {
+		DRM_ERROR("Failed referencing a global TTM memory object.\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+void psb_ttm_global_release(struct drm_psb_private *dev_priv)
+{
+	drm_global_item_unref(&dev_priv->mem_global_ref);
+}