diff options
| author | Peng Ma <peng.ma@nxp.com> | 2020-02-27 07:28:41 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-03-02 12:26:22 +0300 |
| commit | 3e0ca3c38dc2ff5424eefa01a3a91cc9c0f65f5a (patch) | |
| tree | 4d3737e4e113369258f1d538d01f818e454359fe /drivers/dma/fsl-dpaa2-qdma/dpdmai.c | |
| parent | 667b9251440b762ebc8cd3348a6e6ab29401bb97 (diff) | |
| download | linux-3e0ca3c38dc2ff5424eefa01a3a91cc9c0f65f5a.tar.xz | |
dmaengine: fsl-dpaa2-qdma: Adding shutdown hook
We need to ensure DMA engine could be stopped in order for kexec
to start the next kernel.
So add the shutdown operation support.
Signed-off-by: Peng Ma <peng.ma@nxp.com>
Link: https://lore.kernel.org/r/20200227042841.18358-1-peng.ma@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/fsl-dpaa2-qdma/dpdmai.c')
| -rw-r--r-- | drivers/dma/fsl-dpaa2-qdma/dpdmai.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/dma/fsl-dpaa2-qdma/dpdmai.c b/drivers/dma/fsl-dpaa2-qdma/dpdmai.c index f8d22115154a..878662aaa1c2 100644 --- a/drivers/dma/fsl-dpaa2-qdma/dpdmai.c +++ b/drivers/dma/fsl-dpaa2-qdma/dpdmai.c @@ -160,6 +160,27 @@ int dpdmai_create(struct fsl_mc_io *mc_io, u32 cmd_flags, } /** + * dpdmai_destroy() - Destroy the DPDMAI object and release all its resources. + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPDMAI object + * + * Return: '0' on Success; error code otherwise. + */ +int dpdmai_destroy(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token) +{ + struct fsl_mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_DESTROY, + cmd_flags, token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpdmai_destroy); + +/** * dpdmai_enable() - Enable the DPDMAI, allow sending and receiving frames. * @mc_io: Pointer to MC portal's I/O object * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' |