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authorPeng Ma <peng.ma@nxp.com>2020-02-27 07:28:41 +0300
committerVinod Koul <vkoul@kernel.org>2020-03-02 12:26:22 +0300
commit3e0ca3c38dc2ff5424eefa01a3a91cc9c0f65f5a (patch)
tree4d3737e4e113369258f1d538d01f818e454359fe /drivers/dma
parent667b9251440b762ebc8cd3348a6e6ab29401bb97 (diff)
downloadlinux-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')
-rw-r--r--drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c17
-rw-r--r--drivers/dma/fsl-dpaa2-qdma/dpdmai.c21
-rw-r--r--drivers/dma/fsl-dpaa2-qdma/dpdmai.h2
3 files changed, 40 insertions, 0 deletions
diff --git a/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c b/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c
index c70a7965f140..fabbbb90b2c7 100644
--- a/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c
+++ b/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c
@@ -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
};
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_'
diff --git a/drivers/dma/fsl-dpaa2-qdma/dpdmai.h b/drivers/dma/fsl-dpaa2-qdma/dpdmai.h
index 6d785093da8e..b13b9bf0c003 100644
--- a/drivers/dma/fsl-dpaa2-qdma/dpdmai.h
+++ b/drivers/dma/fsl-dpaa2-qdma/dpdmai.h
@@ -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);