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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>
This commit is contained in:
Michal Simek 2014-05-16 13:37:02 +02:00
parent 28d1880c68
commit 193bca5934
4 changed files with 3 additions and 27 deletions
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1
arch/microblaze/include/asm/device.h
View File

@ -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 {

3
arch/microblaze/include/asm/io.h
View File

@ -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

23
arch/microblaze/kernel/dma.c
View File

@ -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,

3
arch/microblaze/pci/pci-common.c
View File

@ -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);
}