Merge ssh://linux-voyager@linux-voyager.bkbits.net/dma-generic-mapping-2.5

into raven.il.steeleye.com:/home/jejb/BK/dma-alloc-flags-2.5

Documentation/DMA-API.txt

@@ -22,7 +22,7 @@ To get the dma_ API, you must #include <linux/dma-mapping.h>
 
 void *
 dma_alloc_coherent(struct device *dev, size_t size,
-			     dma_addr_t *dma_handle)
+			     dma_addr_t *dma_handle, int flag)
 void *
 pci_alloc_consistent(struct pci_dev *dev, size_t size,
 			     dma_addr_t *dma_handle)
@@ -43,6 +43,12 @@ Note: consistent memory can be expensive on some platforms, and the
 minimum allocation length may be as big as a page, so you should
 consolidate your requests for consistent memory as much as possible.
 
+The flag parameter (dma_alloc_coherent only) allows the caller to
+specify the GFP_ flags (see kmalloc) for the allocation (the
+implementation may chose to ignore flags that affect the location of
+the returned memory, like GFP_DMA).  For pci_alloc_consistent, you
+must assume GFP_ATOMIC behaviour.
+
 void
 dma_free_coherent(struct device *dev, size_t size, void *cpu_addr
 			   dma_addr_t dma_handle)
@@ -261,7 +267,7 @@ API at all.
 
 void *
 dma_alloc_noncoherent(struct device *dev, size_t size,
-			       dma_addr_t *dma_handle)
+			       dma_addr_t *dma_handle, int flag)
 
 Identical to dma_alloc_coherent() except that the platform will
 choose to return either consistent or non-consistent memory as it sees

arch/i386/kernel/pci-dma.c

@@ -14,10 +14,11 @@
 #include <asm/io.h>
 
 void *dma_alloc_coherent(struct device *dev, size_t size,
-			   dma_addr_t *dma_handle)
+			   dma_addr_t *dma_handle, int gfp)
 {
 	void *ret;
-	int gfp = GFP_ATOMIC;
+	/* ignore region specifiers */
+	gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
 
 	if (dev == NULL || (*dev->dma_mask < 0xffffffff))
 		gfp |= GFP_DMA;

drivers/scsi/53c700.c

@@ -246,7 +246,7 @@ NCR_700_detect(Scsi_Host_Template *tpnt,
 	int j;
 
 	memory = dma_alloc_noncoherent(hostdata->dev, TOTAL_MEM_SIZE,
-					 &pScript);
+				       &pScript, GFP_KERNEL);
 	if(memory == NULL) {
 		printk(KERN_ERR "53c700: Failed to allocate memory for driver, detatching\n");
 		return NULL;

drivers/scsi/sym53c8xx_comm.h

@@ -797,7 +797,7 @@ static m_addr_t ___dma_getp(m_pool_s *mp)
 		dma_addr_t daddr;
 		vp = (m_addr_t) dma_alloc_coherent(mp->bush,
 						PAGE_SIZE<<MEMO_PAGE_ORDER,
-						&daddr);
+						&daddr, GFP_KERNEL);
 		if (vp) {
 			int hc = VTOB_HASH_CODE(vp);
 			vbp->vaddr = vp;

include/asm-arm/dma-mapping.h

@@ -82,10 +82,8 @@ static inline int dma_is_consistent(dma_addr_t handle)
  * device-viewed address.
  */
 static inline void *
-dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle)
+dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, int gfp)
 {
-	int gfp = GFP_ATOMIC;
-
 	if (dev == NULL || dmadev_is_sa1111(dev) || *dev->dma_mask != 0xffffffff)
 		gfp |= GFP_DMA;
 

include/asm-generic/dma-mapping.h

@@ -30,7 +30,8 @@ dma_set_mask(struct device *dev, u64 dma_mask)
 }
 
 static inline void *
-dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle)
+dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
+		   int flag)
 {
 	BUG_ON(dev->bus != &pci_bus_type);
 
@@ -121,7 +122,7 @@ dma_sync_sg(struct device *dev, struct scatterlist *sg, int nelems,
 
 /* Now for the API extensions over the pci_ one */
 
-#define dma_alloc_noncoherent(d, s, h) dma_alloc_coherent(d, s, h)
+#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 #define dma_is_consistent(d)	(1)
 

include/asm-generic/pci-dma-compat.h

@@ -19,7 +19,7 @@ static inline void *
 pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
 		     dma_addr_t *dma_handle)
 {
-	return dma_alloc_coherent(hwdev == NULL ? NULL : &hwdev->dev, size, dma_handle);
+	return dma_alloc_coherent(hwdev == NULL ? NULL : &hwdev->dev, size, dma_handle, GFP_ATOMIC);
 }
 
 static inline void

include/asm-i386/dma-mapping.h

@@ -3,11 +3,11 @@
 
 #include <asm/cache.h>
 
-#define dma_alloc_noncoherent(d, s, h) dma_alloc_coherent(d, s, h)
+#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 
 void *dma_alloc_coherent(struct device *dev, size_t size,
-			   dma_addr_t *dma_handle);
+			   dma_addr_t *dma_handle, int flag);
 
 void dma_free_coherent(struct device *dev, size_t size,
 			 void *vaddr, dma_addr_t dma_handle);