Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 208 insertions, 0 deletions

diff --git a/drivers/char/drm/ati_pcigart.c b/drivers/char/drm/ati_pcigart.c
new file mode 100644
index 00000000000..fdca1876ecd
--- /dev/null
+++ b/drivers/char/drm/ati_pcigart.c
@@ -0,0 +1,208 @@
+/**
+ * \file ati_pcigart.h 
+ * ATI PCI GART support
+ *
+ * \author Gareth Hughes <gareth@valinux.com>
+ */
+
+/*
+ * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
+ *
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * 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
+ * PRECISION INSIGHT 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.
+ */
+
+#include "drmP.h"
+
+#if PAGE_SIZE == 65536
+# define ATI_PCIGART_TABLE_ORDER	0
+# define ATI_PCIGART_TABLE_PAGES	(1 << 0)
+#elif PAGE_SIZE == 16384
+# define ATI_PCIGART_TABLE_ORDER	1
+# define ATI_PCIGART_TABLE_PAGES	(1 << 1)
+#elif PAGE_SIZE == 8192
+# define ATI_PCIGART_TABLE_ORDER 	2
+# define ATI_PCIGART_TABLE_PAGES 	(1 << 2)
+#elif PAGE_SIZE == 4096
+# define ATI_PCIGART_TABLE_ORDER 	3
+# define ATI_PCIGART_TABLE_PAGES 	(1 << 3)
+#else
+# error - PAGE_SIZE not 64K, 16K, 8K or 4K
+#endif
+
+# define ATI_MAX_PCIGART_PAGES		8192	/**< 32 MB aperture, 4K pages */
+# define ATI_PCIGART_PAGE_SIZE		4096	/**< PCI GART page size */
+
+unsigned long drm_ati_alloc_pcigart_table( void )
+{
+	unsigned long address;
+	struct page *page;
+	int i;
+	DRM_DEBUG( "%s\n", __FUNCTION__ );
+
+	address = __get_free_pages( GFP_KERNEL, ATI_PCIGART_TABLE_ORDER );
+	if ( address == 0UL ) {
+		return 0;
+	}
+
+	page = virt_to_page( address );
+
+	for ( i = 0 ; i < ATI_PCIGART_TABLE_PAGES ; i++, page++ ) {
+		get_page(page);
+		SetPageReserved( page );
+	}
+
+	DRM_DEBUG( "%s: returning 0x%08lx\n", __FUNCTION__, address );
+	return address;
+}
+
+static void drm_ati_free_pcigart_table( unsigned long address )
+{
+	struct page *page;
+	int i;
+	DRM_DEBUG( "%s\n", __FUNCTION__ );
+
+	page = virt_to_page( address );
+
+	for ( i = 0 ; i < ATI_PCIGART_TABLE_PAGES ; i++, page++ ) {
+		__put_page(page);
+		ClearPageReserved( page );
+	}
+
+	free_pages( address, ATI_PCIGART_TABLE_ORDER );
+}
+
+int drm_ati_pcigart_cleanup( drm_device_t *dev,
+			      unsigned long addr,
+			      dma_addr_t bus_addr)
+{
+	drm_sg_mem_t *entry = dev->sg;
+	unsigned long pages;
+	int i;
+
+	/* we need to support large memory configurations */
+	if ( !entry ) {
+		DRM_ERROR( "no scatter/gather memory!\n" );
+		return 0;
+	}
+
+	if ( bus_addr ) {
+		pci_unmap_single(dev->pdev, bus_addr,
+				 ATI_PCIGART_TABLE_PAGES * PAGE_SIZE,
+				 PCI_DMA_TODEVICE);
+
+		pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES )
+		        ? entry->pages : ATI_MAX_PCIGART_PAGES;
+
+		for ( i = 0 ; i < pages ; i++ ) {
+			if ( !entry->busaddr[i] ) break;
+			pci_unmap_single(dev->pdev, entry->busaddr[i],
+					 PAGE_SIZE, PCI_DMA_TODEVICE);
+		}
+	}
+
+	if ( addr ) {
+		drm_ati_free_pcigart_table( addr );
+	}
+
+	return 1;
+}
+EXPORT_SYMBOL(drm_ati_pcigart_cleanup);
+
+int drm_ati_pcigart_init( drm_device_t *dev,
+			   unsigned long *addr,
+			   dma_addr_t *bus_addr)
+{
+	drm_sg_mem_t *entry = dev->sg;
+	unsigned long address = 0;
+	unsigned long pages;
+	u32 *pci_gart, page_base, bus_address = 0;
+	int i, j, ret = 0;
+
+	if ( !entry ) {
+		DRM_ERROR( "no scatter/gather memory!\n" );
+		goto done;
+	}
+
+	address = drm_ati_alloc_pcigart_table();
+	if ( !address ) {
+		DRM_ERROR( "cannot allocate PCI GART page!\n" );
+		goto done;
+	}
+
+	if ( !dev->pdev ) {
+		DRM_ERROR( "PCI device unknown!\n" );
+		goto done;
+	}
+
+	bus_address = pci_map_single(dev->pdev, (void *)address,
+				  ATI_PCIGART_TABLE_PAGES * PAGE_SIZE,
+				  PCI_DMA_TODEVICE);
+	if (bus_address == 0) {
+		DRM_ERROR( "unable to map PCIGART pages!\n" );
+		drm_ati_free_pcigart_table( address );
+		address = 0;
+		goto done;
+	}
+
+	pci_gart = (u32 *)address;
+
+	pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES )
+		? entry->pages : ATI_MAX_PCIGART_PAGES;
+
+	memset( pci_gart, 0, ATI_MAX_PCIGART_PAGES * sizeof(u32) );
+
+	for ( i = 0 ; i < pages ; i++ ) {
+		/* we need to support large memory configurations */
+		entry->busaddr[i] = pci_map_single(dev->pdev,
+					   page_address( entry->pagelist[i] ),
+					   PAGE_SIZE,
+					   PCI_DMA_TODEVICE);
+		if (entry->busaddr[i] == 0) {
+			DRM_ERROR( "unable to map PCIGART pages!\n" );
+			drm_ati_pcigart_cleanup( dev, address, bus_address );
+			address = 0;
+			bus_address = 0;
+			goto done;
+		}
+		page_base = (u32) entry->busaddr[i];
+
+		for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
+			*pci_gart++ = cpu_to_le32( page_base );
+			page_base += ATI_PCIGART_PAGE_SIZE;
+		}
+	}
+
+	ret = 1;
+
+#if defined(__i386__) || defined(__x86_64__)
+	wbinvd();
+#else
+	mb();
+#endif
+
+done:
+	*addr = address;
+	*bus_addr = bus_address;
+	return ret;
+}
+EXPORT_SYMBOL(drm_ati_pcigart_init);