kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-16 22:39:48 +00:00
Code Issues Releases Packages Activity
linux/drivers/dma/dmaengine.h

173 lines
4.5 KiB
Raw Permalink Normal View History

dmaengine: add private header file Add a local private header file to contain definitions and declarations which should only be used by DMA engine drivers. We also fix linux/dmaengine.h to use LINUX_DMAENGINE_H to guard against multiple inclusion. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06 22:34:26 +00:00
dmaengine: provide a common function for completing a dma descriptor Provide a common function to do the cookie mechanics for completing a DMA descriptor. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06 22:35:07 +00:00
dmaengine: add private header file Add a local private header file to contain definitions and declarations which should only be used by DMA engine drivers. We also fix linux/dmaengine.h to use LINUX_DMAENGINE_H to guard against multiple inclusion. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06 22:34:26 +00:00
dmaengine: consolidate initialization of cookies Provide a common function to initialize a channels cookie values. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06 22:35:47 +00:00
dmaengine: consolidate assignment of DMA cookies Everyone deals with assigning DMA cookies in the same way (it's part of the API so they should be), so lets consolidate the common code into a helper function to avoid this duplication. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06 22:34:46 +00:00
dmaengine: provide a common function for completing a dma descriptor Provide a common function to do the cookie mechanics for completing a DMA descriptor. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06 22:35:07 +00:00
dmaengine: consolidate tx_status functions Now that we have the completed cookie in the dma_chan structure, we can consolidate the tx_status functions by providing a function to set the txstate structure and returning the DMA status. We also provide a separate helper to set the residue for cookies which are still in progress. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06 22:35:27 +00:00
dmaengine: Add helper function to prep for error reporting Dmaengine does not provide a way to pass back the result from a DMA transaction through the callback function. We are adding dmaengine helper function in order to prep for a mechanism that allow result status and other information through the callback. The initial conversion will make the existing driver use these new helper functions but retain the original behavior of the code. However, the helper functions paves a way towards adding the result parameter through callback. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:10:31 -07:00
dmaengine: add support to provide error result from a DMA transation Adding a new callback that will provide the error result for a transaction. The result is allocated on the stack and the callback should create a copy if it wishes to retain the information after exiting. The result parameter is now defined and takes over the dummy void pointer we placed in the helper functions previously. dmaengine drivers should start converting to the new "callback_result" callback in order to receive transaction results. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:13:50 -07:00
dmaengine: Add helper function to prep for error reporting Dmaengine does not provide a way to pass back the result from a DMA transaction through the callback function. We are adding dmaengine helper function in order to prep for a mechanism that allow result status and other information through the callback. The initial conversion will make the existing driver use these new helper functions but retain the original behavior of the code. However, the helper functions paves a way towards adding the result parameter through callback. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:10:31 -07:00
dmaengine: add support to provide error result from a DMA transation Adding a new callback that will provide the error result for a transaction. The result is allocated on the stack and the callback should create a copy if it wishes to retain the information after exiting. The result parameter is now defined and takes over the dummy void pointer we placed in the helper functions previously. dmaengine drivers should start converting to the new "callback_result" callback in order to receive transaction results. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:13:50 -07:00
dmaengine: Add helper function to prep for error reporting Dmaengine does not provide a way to pass back the result from a DMA transaction through the callback function. We are adding dmaengine helper function in order to prep for a mechanism that allow result status and other information through the callback. The initial conversion will make the existing driver use these new helper functions but retain the original behavior of the code. However, the helper functions paves a way towards adding the result parameter through callback. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:10:31 -07:00
dmaengine: add support to provide error result from a DMA transation Adding a new callback that will provide the error result for a transaction. The result is allocated on the stack and the callback should create a copy if it wishes to retain the information after exiting. The result parameter is now defined and takes over the dummy void pointer we placed in the helper functions previously. dmaengine drivers should start converting to the new "callback_result" callback in order to receive transaction results. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:13:50 -07:00
dmaengine: Add helper function to prep for error reporting Dmaengine does not provide a way to pass back the result from a DMA transaction through the callback function. We are adding dmaengine helper function in order to prep for a mechanism that allow result status and other information through the callback. The initial conversion will make the existing driver use these new helper functions but retain the original behavior of the code. However, the helper functions paves a way towards adding the result parameter through callback. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:10:31 -07:00
dmaengine: add support to provide error result from a DMA transation Adding a new callback that will provide the error result for a transaction. The result is allocated on the stack and the callback should create a copy if it wishes to retain the information after exiting. The result parameter is now defined and takes over the dummy void pointer we placed in the helper functions previously. dmaengine drivers should start converting to the new "callback_result" callback in order to receive transaction results. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:13:50 -07:00
dmaengine: Add helper function to prep for error reporting Dmaengine does not provide a way to pass back the result from a DMA transaction through the callback function. We are adding dmaengine helper function in order to prep for a mechanism that allow result status and other information through the callback. The initial conversion will make the existing driver use these new helper functions but retain the original behavior of the code. However, the helper functions paves a way towards adding the result parameter through callback. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:10:31 -07:00
dmaengine: add support to provide error result from a DMA transation Adding a new callback that will provide the error result for a transaction. The result is allocated on the stack and the callback should create a copy if it wishes to retain the information after exiting. The result parameter is now defined and takes over the dummy void pointer we placed in the helper functions previously. dmaengine drivers should start converting to the new "callback_result" callback in order to receive transaction results. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:13:50 -07:00
dmaengine: Add helper function to prep for error reporting Dmaengine does not provide a way to pass back the result from a DMA transaction through the callback function. We are adding dmaengine helper function in order to prep for a mechanism that allow result status and other information through the callback. The initial conversion will make the existing driver use these new helper functions but retain the original behavior of the code. However, the helper functions paves a way towards adding the result parameter through callback. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:10:31 -07:00
dmaengine: add support to provide error result from a DMA transation Adding a new callback that will provide the error result for a transaction. The result is allocated on the stack and the callback should create a copy if it wishes to retain the information after exiting. The result parameter is now defined and takes over the dummy void pointer we placed in the helper functions previously. dmaengine drivers should start converting to the new "callback_result" callback in order to receive transaction results. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:13:50 -07:00
dmaengine: Add helper function to prep for error reporting Dmaengine does not provide a way to pass back the result from a DMA transaction through the callback function. We are adding dmaengine helper function in order to prep for a mechanism that allow result status and other information through the callback. The initial conversion will make the existing driver use these new helper functions but retain the original behavior of the code. However, the helper functions paves a way towards adding the result parameter through callback. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:10:31 -07:00
dmaengine: add support to provide error result from a DMA transation Adding a new callback that will provide the error result for a transaction. The result is allocated on the stack and the callback should create a copy if it wishes to retain the information after exiting. The result parameter is now defined and takes over the dummy void pointer we placed in the helper functions previously. dmaengine drivers should start converting to the new "callback_result" callback in order to receive transaction results. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:13:50 -07:00
dmaengine: Add helper function to prep for error reporting Dmaengine does not provide a way to pass back the result from a DMA transaction through the callback function. We are adding dmaengine helper function in order to prep for a mechanism that allow result status and other information through the callback. The initial conversion will make the existing driver use these new helper functions but retain the original behavior of the code. However, the helper functions paves a way towards adding the result parameter through callback. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:10:31 -07:00
dmaengine: add support to provide error result from a DMA transation Adding a new callback that will provide the error result for a transaction. The result is allocated on the stack and the callback should create a copy if it wishes to retain the information after exiting. The result parameter is now defined and takes over the dummy void pointer we placed in the helper functions previously. dmaengine drivers should start converting to the new "callback_result" callback in order to receive transaction results. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:13:50 -07:00
dmaengine: Add helper function to prep for error reporting Dmaengine does not provide a way to pass back the result from a DMA transaction through the callback function. We are adding dmaengine helper function in order to prep for a mechanism that allow result status and other information through the callback. The initial conversion will make the existing driver use these new helper functions but retain the original behavior of the code. However, the helper functions paves a way towards adding the result parameter through callback. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-20 13:10:31 -07:00
dmaengine: add private header file Add a local private header file to contain definitions and declarations which should only be used by DMA engine drivers. We also fix linux/dmaengine.h to use LINUX_DMAENGINE_H to guard against multiple inclusion. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> [imx-sdma.c & mxs-dma.c] Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-03-06 22:34:26 +00:00