Linux-2.6.12-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);