Commit 3e0ca3c3 authored by Peng Ma's avatar Peng Ma Committed by Vinod Koul
Browse files

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: default avatarPeng Ma <peng.ma@nxp.com>
Link: https://lore.kernel.org/r/20200227042841.18358-1-peng.ma@nxp.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 667b9251

drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c

+17 −0
Original line number Diff line number Diff line
@@ -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

};

drivers/dma/fsl-dpaa2-qdma/dpdmai.c

+21 −0
Original line number Diff line number Diff line
@@ -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

drivers/dma/fsl-dpaa2-qdma/dpdmai.h

+2 −0
Original line number Diff line number Diff line
@@ -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);

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