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authorMichal Simek <michal.simek@xilinx.com>2014-05-16 15:37:02 +0400
committerMichal Simek <michal.simek@xilinx.com>2014-06-04 08:59:57 +0400
commit193bca5934db1ca1d0ffcedf551030ff5556a07c (patch)
treee5ae4908176bd9b26f1b73407892d9b64be12410 /arch/microblaze
parent28d1880c6872af3d1c17bc46da5795b9eba04bee (diff)
downloadlinux-193bca5934db1ca1d0ffcedf551030ff5556a07c.tar.xz
microblaze: Cleanup PCI_DRAM_OFFSET handling
PCI_DRAM_OFFSET/pci_dram_offset is 0 all the time and there is no difference for PCI and !PCI cases. Also remove the whole code which setup archdata.dma_data which is completely unused. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/include/asm/device.h1
-rw-r--r--arch/microblaze/include/asm/io.h3
-rw-r--r--arch/microblaze/kernel/dma.c23
-rw-r--r--arch/microblaze/pci/pci-common.c3
4 files changed, 3 insertions, 27 deletions
diff --git a/arch/microblaze/include/asm/device.h b/arch/microblaze/include/asm/device.h
index 123b2fe72d01..eb639b479c7b 100644
--- a/arch/microblaze/include/asm/device.h
+++ b/arch/microblaze/include/asm/device.h
@@ -14,7 +14,6 @@ struct device_node;
struct dev_archdata {
/* DMA operations on that device */
struct dma_map_ops *dma_ops;
- void *dma_data;
};
struct pdev_archdata {
diff --git a/arch/microblaze/include/asm/io.h b/arch/microblaze/include/asm/io.h
index 1e4c3329f62e..433751b2a003 100644
--- a/arch/microblaze/include/asm/io.h
+++ b/arch/microblaze/include/asm/io.h
@@ -19,17 +19,14 @@
#ifndef CONFIG_PCI
#define _IO_BASE 0
#define _ISA_MEM_BASE 0
-#define PCI_DRAM_OFFSET 0
#else
#define _IO_BASE isa_io_base
#define _ISA_MEM_BASE isa_mem_base
-#define PCI_DRAM_OFFSET pci_dram_offset
struct pci_dev;
extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
#define pci_iounmap pci_iounmap
extern unsigned long isa_io_base;
-extern unsigned long pci_dram_offset;
extern resource_size_t isa_mem_base;
#endif
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c
index da68d00fd087..8f9b99508e79 100644
--- a/arch/microblaze/kernel/dma.c
+++ b/arch/microblaze/kernel/dma.c
@@ -13,23 +13,6 @@
#include <linux/export.h>
#include <linux/bug.h>
-/*
- * Generic direct DMA implementation
- *
- * This implementation supports a per-device offset that can be applied if
- * the address at which memory is visible to devices is not 0. Platform code
- * can set archdata.dma_data to an unsigned long holding the offset. By
- * default the offset is PCI_DRAM_OFFSET.
- */
-
-static unsigned long get_dma_direct_offset(struct device *dev)
-{
- if (likely(dev))
- return (unsigned long)dev->archdata.dma_data;
-
- return PCI_DRAM_OFFSET; /* FIXME Not sure if is correct */
-}
-
#define NOT_COHERENT_CACHE
static void *dma_direct_alloc_coherent(struct device *dev, size_t size,
@@ -51,7 +34,7 @@ static void *dma_direct_alloc_coherent(struct device *dev, size_t size,
return NULL;
ret = page_address(page);
memset(ret, 0, size);
- *dma_handle = virt_to_phys(ret) + get_dma_direct_offset(dev);
+ *dma_handle = virt_to_phys(ret);
return ret;
#endif
@@ -77,7 +60,7 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl,
/* FIXME this part of code is untested */
for_each_sg(sgl, sg, nents, i) {
- sg->dma_address = sg_phys(sg) + get_dma_direct_offset(dev);
+ sg->dma_address = sg_phys(sg);
__dma_sync(page_to_phys(sg_page(sg)) + sg->offset,
sg->length, direction);
}
@@ -104,7 +87,7 @@ static inline dma_addr_t dma_direct_map_page(struct device *dev,
struct dma_attrs *attrs)
{
__dma_sync(page_to_phys(page) + offset, size, direction);
- return page_to_phys(page) + offset + get_dma_direct_offset(dev);
+ return page_to_phys(page) + offset;
}
static inline void dma_direct_unmap_page(struct device *dev,
diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
index 99ac12ad4b9b..2cf412f4db4e 100644
--- a/arch/microblaze/pci/pci-common.c
+++ b/arch/microblaze/pci/pci-common.c
@@ -48,7 +48,6 @@ static int global_phb_number; /* Global phb counter */
resource_size_t isa_mem_base;
unsigned long isa_io_base;
-unsigned long pci_dram_offset;
static int pci_bus_count;
struct pci_controller *pcibios_alloc_controller(struct device_node *dev)
@@ -872,8 +871,6 @@ void pcibios_setup_bus_devices(struct pci_bus *bus)
*/
set_dev_node(&dev->dev, pcibus_to_node(dev->bus));
- dev->dev.archdata.dma_data = (void *)PCI_DRAM_OFFSET;
-
/* Read default IRQs and fixup if necessary */
dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
}