linux/arch/sh/drivers
Thomas Petazzoni bf9c7e3d79 arch/sh: pcie-sh7786: handle non-zero DMA offset
On SuperH, the base of the physical memory might be different from
zero. In this case, PCI address zero will map to a non-zero physical
address. In order to make sure that the DMA mapping API takes care of
this DMA offset, we must fill in the dev->dma_pfn_offset field for PCI
devices. This gets done in the pcibios_bus_add_device() hook, called
for each new PCI device detected.

The dma_pfn_offset global variable is re-calculated for every PCI
controller available on the platform, but that's not an issue because
its value will each time be exactly the same, as it only depends on
the memory start address and memory size.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Rich Felker <dalias@libc.org>
2018-04-12 19:47:58 -04:00
..
dma License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci arch/sh: pcie-sh7786: handle non-zero DMA offset 2018-04-12 19:47:58 -04:00
superhyway
heartbeat.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
push-switch.c treewide: Use DEVICE_ATTR_RO 2018-01-09 16:34:34 +01:00