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path: root/drivers/parisc/ccio-dma.c
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Diffstat (limited to 'drivers/parisc/ccio-dma.c')
-rw-r--r--drivers/parisc/ccio-dma.c54
1 files changed, 28 insertions, 26 deletions
diff --git a/drivers/parisc/ccio-dma.c b/drivers/parisc/ccio-dma.c
index feef537257d0..4e7071714356 100644
--- a/drivers/parisc/ccio-dma.c
+++ b/drivers/parisc/ccio-dma.c
@@ -517,10 +517,10 @@ static u32 hint_lookup[] = {
* ccio_io_pdir_entry - Initialize an I/O Pdir.
* @pdir_ptr: A pointer into I/O Pdir.
* @sid: The Space Identifier.
- * @vba: The virtual address.
+ * @pba: The physical address.
* @hints: The DMA Hint.
*
- * Given a virtual address (vba, arg2) and space id, (sid, arg1),
+ * Given a physical address (pba, arg2) and space id, (sid, arg1),
* load the I/O PDIR entry pointed to by pdir_ptr (arg0). Each IO Pdir
* entry consists of 8 bytes as shown below (MSB == bit 0):
*
@@ -543,7 +543,7 @@ static u32 hint_lookup[] = {
* index are bits 12:19 of the value returned by LCI.
*/
static void
-ccio_io_pdir_entry(__le64 *pdir_ptr, space_t sid, unsigned long vba,
+ccio_io_pdir_entry(__le64 *pdir_ptr, space_t sid, phys_addr_t pba,
unsigned long hints)
{
register unsigned long pa;
@@ -557,7 +557,7 @@ ccio_io_pdir_entry(__le64 *pdir_ptr, space_t sid, unsigned long vba,
** "hints" parm includes the VALID bit!
** "dep" clobbers the physical address offset bits as well.
*/
- pa = lpa(vba);
+ pa = pba;
asm volatile("depw %1,31,12,%0" : "+r" (pa) : "r" (hints));
((u32 *)pdir_ptr)[1] = (u32) pa;
@@ -582,7 +582,7 @@ ccio_io_pdir_entry(__le64 *pdir_ptr, space_t sid, unsigned long vba,
** Grab virtual index [0:11]
** Deposit virt_idx bits into I/O PDIR word
*/
- asm volatile ("lci %%r0(%1), %0" : "=r" (ci) : "r" (vba));
+ asm volatile ("lci %%r0(%1), %0" : "=r" (ci) : "r" (phys_to_virt(pba)));
asm volatile ("extru %1,19,12,%0" : "+r" (ci) : "r" (ci));
asm volatile ("depw %1,15,12,%0" : "+r" (pa) : "r" (ci));
@@ -704,14 +704,14 @@ ccio_dma_supported(struct device *dev, u64 mask)
/**
* ccio_map_single - Map an address range into the IOMMU.
* @dev: The PCI device.
- * @addr: The start address of the DMA region.
+ * @addr: The physical address of the DMA region.
* @size: The length of the DMA region.
* @direction: The direction of the DMA transaction (to/from device).
*
* This function implements the pci_map_single function.
*/
static dma_addr_t
-ccio_map_single(struct device *dev, void *addr, size_t size,
+ccio_map_single(struct device *dev, phys_addr_t addr, size_t size,
enum dma_data_direction direction)
{
int idx;
@@ -730,7 +730,7 @@ ccio_map_single(struct device *dev, void *addr, size_t size,
BUG_ON(size <= 0);
/* save offset bits */
- offset = ((unsigned long) addr) & ~IOVP_MASK;
+ offset = offset_in_page(addr);
/* round up to nearest IOVP_SIZE */
size = ALIGN(size + offset, IOVP_SIZE);
@@ -746,15 +746,15 @@ ccio_map_single(struct device *dev, void *addr, size_t size,
pdir_start = &(ioc->pdir_base[idx]);
- DBG_RUN("%s() %px -> %#lx size: %zu\n",
- __func__, addr, (long)(iovp | offset), size);
+ DBG_RUN("%s() %pa -> %#lx size: %zu\n",
+ __func__, &addr, (long)(iovp | offset), size);
/* If not cacheline aligned, force SAFE_DMA on the whole mess */
- if((size % L1_CACHE_BYTES) || ((unsigned long)addr % L1_CACHE_BYTES))
+ if ((size % L1_CACHE_BYTES) || (addr % L1_CACHE_BYTES))
hint |= HINT_SAFE_DMA;
while(size > 0) {
- ccio_io_pdir_entry(pdir_start, KERNEL_SPACE, (unsigned long)addr, hint);
+ ccio_io_pdir_entry(pdir_start, KERNEL_SPACE, addr, hint);
DBG_RUN(" pdir %p %08x%08x\n",
pdir_start,
@@ -773,17 +773,18 @@ ccio_map_single(struct device *dev, void *addr, size_t size,
static dma_addr_t
-ccio_map_page(struct device *dev, struct page *page, unsigned long offset,
- size_t size, enum dma_data_direction direction,
- unsigned long attrs)
+ccio_map_phys(struct device *dev, phys_addr_t phys, size_t size,
+ enum dma_data_direction direction, unsigned long attrs)
{
- return ccio_map_single(dev, page_address(page) + offset, size,
- direction);
+ if (unlikely(attrs & DMA_ATTR_MMIO))
+ return DMA_MAPPING_ERROR;
+
+ return ccio_map_single(dev, phys, size, direction);
}
/**
- * ccio_unmap_page - Unmap an address range from the IOMMU.
+ * ccio_unmap_phys - Unmap an address range from the IOMMU.
* @dev: The PCI device.
* @iova: The start address of the DMA region.
* @size: The length of the DMA region.
@@ -791,7 +792,7 @@ ccio_map_page(struct device *dev, struct page *page, unsigned long offset,
* @attrs: attributes
*/
static void
-ccio_unmap_page(struct device *dev, dma_addr_t iova, size_t size,
+ccio_unmap_phys(struct device *dev, dma_addr_t iova, size_t size,
enum dma_data_direction direction, unsigned long attrs)
{
struct ioc *ioc;
@@ -853,7 +854,8 @@ ccio_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag,
if (ret) {
memset(ret, 0, size);
- *dma_handle = ccio_map_single(dev, ret, size, DMA_BIDIRECTIONAL);
+ *dma_handle = ccio_map_single(dev, virt_to_phys(ret), size,
+ DMA_BIDIRECTIONAL);
}
return ret;
@@ -873,7 +875,7 @@ static void
ccio_free(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_handle, unsigned long attrs)
{
- ccio_unmap_page(dev, dma_handle, size, 0, 0);
+ ccio_unmap_phys(dev, dma_handle, size, 0, 0);
free_pages((unsigned long)cpu_addr, get_order(size));
}
@@ -920,7 +922,7 @@ ccio_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
/* Fast path single entry scatterlists. */
if (nents == 1) {
sg_dma_address(sglist) = ccio_map_single(dev,
- sg_virt(sglist), sglist->length,
+ sg_phys(sglist), sglist->length,
direction);
sg_dma_len(sglist) = sglist->length;
return 1;
@@ -1004,7 +1006,7 @@ ccio_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
#ifdef CCIO_COLLECT_STATS
ioc->usg_pages += sg_dma_len(sglist) >> PAGE_SHIFT;
#endif
- ccio_unmap_page(dev, sg_dma_address(sglist),
+ ccio_unmap_phys(dev, sg_dma_address(sglist),
sg_dma_len(sglist), direction, 0);
++sglist;
nents--;
@@ -1017,8 +1019,8 @@ static const struct dma_map_ops ccio_ops = {
.dma_supported = ccio_dma_supported,
.alloc = ccio_alloc,
.free = ccio_free,
- .map_page = ccio_map_page,
- .unmap_page = ccio_unmap_page,
+ .map_phys = ccio_map_phys,
+ .unmap_phys = ccio_unmap_phys,
.map_sg = ccio_map_sg,
.unmap_sg = ccio_unmap_sg,
.get_sgtable = dma_common_get_sgtable,
@@ -1072,7 +1074,7 @@ static int ccio_proc_info(struct seq_file *m, void *p)
ioc->msingle_calls, ioc->msingle_pages,
(int)((ioc->msingle_pages * 1000)/ioc->msingle_calls));
- /* KLUGE - unmap_sg calls unmap_page for each mapped page */
+ /* KLUGE - unmap_sg calls unmap_phys for each mapped page */
min = ioc->usingle_calls - ioc->usg_calls;
max = ioc->usingle_pages - ioc->usg_pages;
seq_printf(m, "pci_unmap_single: %8ld calls %8ld pages (avg %d/1000)\n",
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-07 09:39:51 +0000