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author | Ioana Ciornei <ioana.ciornei@nxp.com> | 2019-10-31 01:18:29 +0200 |
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committer | David S. Miller <davem@davemloft.net> | 2019-10-31 14:19:45 -0700 |
commit | 1ac210d128ef6e92698dd3aa4e2e03e831bc9906 (patch) | |
tree | 2d1db01a35bee3a27133dc38a9bfe21fecf69ff3 /drivers/bus/fsl-mc/dprc.c | |
parent | 6fff8c010785b0cb46de08eda679739d3cb658fa (diff) | |
download | linux-stable-1ac210d128ef6e92698dd3aa4e2e03e831bc9906.tar.gz linux-stable-1ac210d128ef6e92698dd3aa4e2e03e831bc9906.tar.bz2 linux-stable-1ac210d128ef6e92698dd3aa4e2e03e831bc9906.zip |
bus: fsl-mc: add the fsl_mc_get_endpoint function
Using the newly added fsl_mc_get_endpoint function a fsl-mc driver can
find its associated endpoint (another object at the other link of a MC
firmware link).
The API will be used in the following patch in order to discover the
connected DPMAC object of a DPNI.
Also, the fsl_mc_device_lookup function is made available to the entire
fsl-mc bus driver and not just for the dprc driver.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/bus/fsl-mc/dprc.c')
-rw-r--r-- | drivers/bus/fsl-mc/dprc.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/bus/fsl-mc/dprc.c b/drivers/bus/fsl-mc/dprc.c index 0fe3f52ae0de..602f030d84eb 100644 --- a/drivers/bus/fsl-mc/dprc.c +++ b/drivers/bus/fsl-mc/dprc.c @@ -554,3 +554,56 @@ int dprc_get_container_id(struct fsl_mc_io *mc_io, return 0; } + +/** + * dprc_get_connection() - Get connected endpoint and link status if connection + * exists. + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPRC object + * @endpoint1: Endpoint 1 configuration parameters + * @endpoint2: Returned endpoint 2 configuration parameters + * @state: Returned link state: + * 1 - link is up; + * 0 - link is down; + * -1 - no connection (endpoint2 information is irrelevant) + * + * Return: '0' on Success; -ENOTCONN if connection does not exist. + */ +int dprc_get_connection(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token, + const struct dprc_endpoint *endpoint1, + struct dprc_endpoint *endpoint2, + int *state) +{ + struct dprc_cmd_get_connection *cmd_params; + struct dprc_rsp_get_connection *rsp_params; + struct fsl_mc_command cmd = { 0 }; + int err, i; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_CONNECTION, + cmd_flags, + token); + cmd_params = (struct dprc_cmd_get_connection *)cmd.params; + cmd_params->ep1_id = cpu_to_le32(endpoint1->id); + cmd_params->ep1_interface_id = cpu_to_le16(endpoint1->if_id); + for (i = 0; i < 16; i++) + cmd_params->ep1_type[i] = endpoint1->type[i]; + + /* send command to mc */ + err = mc_send_command(mc_io, &cmd); + if (err) + return -ENOTCONN; + + /* retrieve response parameters */ + rsp_params = (struct dprc_rsp_get_connection *)cmd.params; + endpoint2->id = le32_to_cpu(rsp_params->ep2_id); + endpoint2->if_id = le16_to_cpu(rsp_params->ep2_interface_id); + *state = le32_to_cpu(rsp_params->state); + for (i = 0; i < 16; i++) + endpoint2->type[i] = rsp_params->ep2_type[i]; + + return 0; +} |