Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 169 insertions, 0 deletions

diff --git a/nx-X11/extras/drm/linux/drm_pci.h b/nx-X11/extras/drm/linux/drm_pci.h
new file mode 100644
index 000000000..b9d54c452
--- /dev/null
+++ b/nx-X11/extras/drm/linux/drm_pci.h
@@ -0,0 +1,169 @@
+/* drm_pci.h -- PCI DMA memory management wrappers for DRM -*- linux-c -*- */
+/**
+ * \file drm_pci.h
+ * \brief Functions and ioctls to manage PCI memory
+ * 
+ * \warning These interfaces aren't stable yet.
+ * 
+ * \todo Implement the remaining ioctl's for the PCI pools.
+ * \todo Add support to map these buffers.
+ * \todo The wrappers here are so thin that they would be better off inlined..
+ *
+ * \author José Fonseca <jrfonseca@tungstengraphics.com>
+ * \author Leif Delgass <ldelgass@retinalburn.net>
+ */
+
+/*
+ * Copyright 2003 José Fonseca.
+ * Copyright 2003 Leif Delgass.
+ * 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
+ * AUTHORS 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.
+ */
+
+
+#include <linux/pci.h>
+#include "drmP.h"
+
+/**********************************************************************/
+/** \name PCI memory */
+/*@{*/
+
+
+/**
+ * \brief Allocate a PCI consistent memory block, for DMA.
+ */
+void *
+DRM(pci_alloc)(drm_device_t *dev, size_t size, size_t align, 
+	       dma_addr_t maxaddr, dma_addr_t *busaddr)
+{
+	void *address;
+#if 0
+	unsigned long addr;
+	size_t sz;
+#endif
+#if DRM_DEBUG_MEMORY
+	int area = DRM_MEM_DMA;
+
+	spin_lock(&DRM(mem_lock));
+	if ((DRM(ram_used) >> PAGE_SHIFT)
+	    > (DRM_RAM_PERCENT * DRM(ram_available)) / 100) {
+		spin_unlock(&DRM(mem_lock));
+		return 0;
+	}
+	spin_unlock(&DRM(mem_lock));
+#endif
+
+	/* pci_alloc_consistent only guarantees alignment to the smallest 
+	 * PAGE_SIZE order which is greater than or equal to the requested size.
+	 * Return NULL here for now to make sure nobody tries for larger alignment
+	 */
+	if (align > size)
+		return NULL;
+
+	if (pci_set_dma_mask( dev->pdev, maxaddr ) != 0) {
+		DRM_ERROR( "Setting pci dma mask failed\n" );
+		return NULL;
+	}
+
+	address = pci_alloc_consistent( dev->pdev, size, busaddr );
+
+#if DRM_DEBUG_MEMORY
+	if (address == NULL) {
+		spin_lock(&DRM(mem_lock));
+		++DRM(mem_stats)[area].fail_count;
+		spin_unlock(&DRM(mem_lock));
+		return NULL;
+	}
+
+	spin_lock(&DRM(mem_lock));
+	++DRM(mem_stats)[area].succeed_count;
+	DRM(mem_stats)[area].bytes_allocated += size;
+	DRM(ram_used)		             += size;
+	spin_unlock(&DRM(mem_lock));
+#else
+	if (address == NULL)
+		return NULL;
+#endif
+
+	memset(address, 0, size);
+
+#if 0
+	/* XXX - Is virt_to_page() legal for consistent mem? */
+				/* Reserve */
+	for (addr = (unsigned long)address, sz = size;
+	     sz > 0;
+	     addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+		SetPageReserved(virt_to_page(addr));
+	}
+#endif
+
+	return address;
+}
+
+/**
+ * \brief Free a PCI consistent memory block.
+ */
+void
+DRM(pci_free)(drm_device_t *dev, size_t size, void *vaddr, dma_addr_t busaddr)
+{
+#if 0
+	unsigned long addr;
+	size_t sz;
+#endif
+#if DRM_DEBUG_MEMORY
+	int area = DRM_MEM_DMA;
+	int alloc_count;
+	int free_count;
+#endif
+
+	if (!vaddr) {
+#if DRM_DEBUG_MEMORY
+		DRM_MEM_ERROR(area, "Attempt to free address 0\n");
+#endif
+	} else {
+#if 0
+		/* XXX - Is virt_to_page() legal for consistent mem? */
+				/* Unreserve */
+		for (addr = (unsigned long)vaddr, sz = size;
+		     sz > 0;
+		     addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+			ClearPageReserved(virt_to_page(addr));
+		}
+#endif
+		pci_free_consistent( dev->pdev, size, vaddr, busaddr );
+	}
+
+#if DRM_DEBUG_MEMORY
+	spin_lock(&DRM(mem_lock));
+	free_count  = ++DRM(mem_stats)[area].free_count;
+	alloc_count =	DRM(mem_stats)[area].succeed_count;
+	DRM(mem_stats)[area].bytes_freed += size;
+	DRM(ram_used)			 -= size;
+	spin_unlock(&DRM(mem_lock));
+	if (free_count > alloc_count) {
+		DRM_MEM_ERROR(area,
+			      "Excess frees: %d frees, %d allocs\n",
+			      free_count, alloc_count);
+	}
+#endif
+
+}
+
+/*@}*/