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| author | Laurentiu Tudor <laurentiu.tudor@nxp.com> | 2019-05-29 12:28:40 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-06-03 16:00:07 +0200 |
| commit | b0310c2f09bbe8aebefb97ed67949a3a7092aca6 (patch) | |
| tree | a0c1be9e4cf413c4bafcd77e95a84830e0f21dcd /drivers/usb/Kconfig | |
| parent | lib/genalloc: add gen_pool_dma_zalloc() for zeroed DMA allocations (diff) | |
| download | linux-b0310c2f09bbe8aebefb97ed67949a3a7092aca6.tar.xz linux-b0310c2f09bbe8aebefb97ed67949a3a7092aca6.zip | |
USB: use genalloc for USB HCs with local memory
For HCs that have local memory, replace the current DMA API usage with
a genalloc generic allocator to manage the mappings for these devices.
To help users, introduce a new HCD API, usb_hcd_setup_local_mem() that
will setup up the genalloc backing up the device local memory. It will
be used in subsequent patches. This is in preparation for dropping
the existing "coherent" dma mem declaration APIs. The current
implementation was relying on a short circuit in the DMA API that in
the end, was acting as an allocator for these type of devices.
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Tested-by: Fredrik Noring <noring@nocrew.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/usb/Kconfig')
| -rw-r--r-- | drivers/usb/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig index e4b27413f528..389c57d8eba7 100644 --- a/drivers/usb/Kconfig +++ b/drivers/usb/Kconfig @@ -45,6 +45,7 @@ config USB_ARCH_HAS_HCD config USB tristate "Support for Host-side USB" depends on USB_ARCH_HAS_HCD + select GENERIC_ALLOCATOR select USB_COMMON select NLS # for UTF-8 strings ---help--- |