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dmaengine: fsl-dpaa2-qdma: Adding shutdown hook

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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>
This commit is contained in:
Peng Ma 2020-02-27 12:28:41 +08:00 committed by Vinod Koul
parent 667b925144
commit 3e0ca3c38d
3 changed files with 40 additions and 0 deletions
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17
drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c
View file

@ -790,6 +790,22 @@ static int dpaa2_qdma_remove(struct fsl_mc_device *ls_dev)
return 0;
}
static void dpaa2_qdma_shutdown(struct fsl_mc_device *ls_dev)
{
struct dpaa2_qdma_engine *dpaa2_qdma;
struct dpaa2_qdma_priv *priv;
struct device *dev;
dev = &ls_dev->dev;
priv = dev_get_drvdata(dev);
dpaa2_qdma = priv->dpaa2_qdma;
dpdmai_disable(priv->mc_io, 0, ls_dev->mc_handle);
dpaa2_dpdmai_dpio_unbind(priv);
dpdmai_close(priv->mc_io, 0, ls_dev->mc_handle);
dpdmai_destroy(priv->mc_io, 0, ls_dev->mc_handle);
}
static const struct fsl_mc_device_id dpaa2_qdma_id_table[] = {
{
.vendor = FSL_MC_VENDOR_FREESCALE,
@ -805,6 +821,7 @@ static struct fsl_mc_driver dpaa2_qdma_driver = {
},
.probe = dpaa2_qdma_probe,
.remove = dpaa2_qdma_remove,
.shutdown = dpaa2_qdma_shutdown,
.match_id_table = dpaa2_qdma_id_table
};

21
drivers/dma/fsl-dpaa2-qdma/dpdmai.c
View file

@ -159,6 +159,27 @@ int dpdmai_create(struct fsl_mc_io *mc_io, u32 cmd_flags,
return 0;
}
/**
* 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

2
drivers/dma/fsl-dpaa2-qdma/dpdmai.h
View file

@ -18,6 +18,7 @@
#define DPDMAI_CMDID_CLOSE DPDMAI_CMDID_FORMAT(0x800)
#define DPDMAI_CMDID_OPEN DPDMAI_CMDID_FORMAT(0x80E)
#define DPDMAI_CMDID_CREATE DPDMAI_CMDID_FORMAT(0x90E)
#define DPDMAI_CMDID_DESTROY DPDMAI_CMDID_FORMAT(0x900)
#define DPDMAI_CMDID_ENABLE DPDMAI_CMDID_FORMAT(0x002)
#define DPDMAI_CMDID_DISABLE DPDMAI_CMDID_FORMAT(0x003)
@ -160,6 +161,7 @@ struct dpdmai_rx_queue_attr {
int dpdmai_open(struct fsl_mc_io *mc_io, u32 cmd_flags,
int dpdmai_id, u16 *token);
int dpdmai_close(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token);
int dpdmai_destroy(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token);
int dpdmai_create(struct fsl_mc_io *mc_io, u32 cmd_flags,
const struct dpdmai_cfg *cfg, u16 *token);
int dpdmai_enable(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token);