X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fchar%2Fdrm%2Fdrm_pci.c;h=86a0f1c2209111075eb096d971271e08082f9e76;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=192e8762571c890b0b10d536234d326b0bfcac06;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git

diff --git a/drivers/char/drm/drm_pci.c b/drivers/char/drm/drm_pci.c
index 192e87625..86a0f1c22 100644
--- a/drivers/char/drm/drm_pci.c
+++ b/drivers/char/drm/drm_pci.c
@@ -37,6 +37,7 @@
  */
 
 #include <linux/pci.h>
+#include <linux/dma-mapping.h>
 #include "drmP.h"
 
 /**********************************************************************/
@@ -46,11 +47,15 @@
 /**
  * \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)
+drm_dma_handle_t *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align,
+				dma_addr_t maxaddr)
 {
-	void *address;
-#if DRM_DEBUG_MEMORY
+	drm_dma_handle_t *dmah;
+#if 1
+	unsigned long addr;
+	size_t sz;
+#endif
+#ifdef DRM_DEBUG_MEMORY
 	int area = DRM_MEM_DMA;
 
 	spin_lock(&drm_mem_lock);
@@ -74,13 +79,19 @@ void *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align,
 		return NULL;
 	}
 
-	address = pci_alloc_consistent(dev->pdev, size, busaddr);
+	dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
+	if (!dmah)
+		return NULL;
+
+	dmah->size = size;
+	dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP);
 
-#if DRM_DEBUG_MEMORY
-	if (address == NULL) {
+#ifdef DRM_DEBUG_MEMORY
+	if (dmah->vaddr == NULL) {
 		spin_lock(&drm_mem_lock);
 		++drm_mem_stats[area].fail_count;
 		spin_unlock(&drm_mem_lock);
+		kfree(dmah);
 		return NULL;
 	}
 
@@ -90,37 +101,59 @@ void *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align,
 	drm_ram_used += size;
 	spin_unlock(&drm_mem_lock);
 #else
-	if (address == NULL)
+	if (dmah->vaddr == NULL) {
+		kfree(dmah);
 		return NULL;
+	}
 #endif
 
-	memset(address, 0, size);
+	memset(dmah->vaddr, 0, size);
 
-	return address;
+	/* XXX - Is virt_to_page() legal for consistent mem? */
+	/* Reserve */
+	for (addr = (unsigned long)dmah->vaddr, sz = size;
+	     sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+		SetPageReserved(virt_to_page(addr));
+	}
+
+	return dmah;
 }
+
 EXPORT_SYMBOL(drm_pci_alloc);
 
 /**
- * \brief Free a PCI consistent memory block.
+ * \brief Free a PCI consistent memory block without freeing its descriptor.
+ *
+ * This function is for internal use in the Linux-specific DRM core code.
  */
-void
-drm_pci_free(drm_device_t * dev, size_t size, void *vaddr, dma_addr_t busaddr)
+void __drm_pci_free(drm_device_t * dev, drm_dma_handle_t * dmah)
 {
-#if DRM_DEBUG_MEMORY
+#if 1
+	unsigned long addr;
+	size_t sz;
+#endif
+#ifdef DRM_DEBUG_MEMORY
 	int area = DRM_MEM_DMA;
 	int alloc_count;
 	int free_count;
 #endif
 
-	if (!vaddr) {
-#if DRM_DEBUG_MEMORY
+	if (!dmah->vaddr) {
+#ifdef DRM_DEBUG_MEMORY
 		DRM_MEM_ERROR(area, "Attempt to free address 0\n");
 #endif
 	} else {
-		pci_free_consistent(dev->pdev, size, vaddr, busaddr);
+		/* XXX - Is virt_to_page() legal for consistent mem? */
+		/* Unreserve */
+		for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
+		     sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+			ClearPageReserved(virt_to_page(addr));
+		}
+		dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
+				  dmah->busaddr);
 	}
 
-#if DRM_DEBUG_MEMORY
+#ifdef DRM_DEBUG_MEMORY
 	spin_lock(&drm_mem_lock);
 	free_count = ++drm_mem_stats[area].free_count;
 	alloc_count = drm_mem_stats[area].succeed_count;
@@ -135,6 +168,16 @@ drm_pci_free(drm_device_t * dev, size_t size, void *vaddr, dma_addr_t busaddr)
 #endif
 
 }
+
+/**
+ * \brief Free a PCI consistent memory block
+ */
+void drm_pci_free(drm_device_t * dev, drm_dma_handle_t * dmah)
+{
+	__drm_pci_free(dev, dmah);
+	kfree(dmah);
+}
+
 EXPORT_SYMBOL(drm_pci_free);
 
 /*@}*/