1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
3 * Copyright 2013-2016 Freescale Semiconductor Inc.
7 #include <linux/kernel.h>
8 #include <linux/fsl/mc.h>
14 * Data Path I/O Portal API
15 * Contains initialization APIs and runtime control APIs for DPIO
19 * dpio_open() - Open a control session for the specified object
20 * @mc_io: Pointer to MC portal's I/O object
21 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
22 * @dpio_id: DPIO unique ID
23 * @token: Returned token; use in subsequent API calls
25 * This function can be used to open a control session for an
26 * already created object; an object may have been declared in
27 * the DPL or by calling the dpio_create() function.
28 * This function returns a unique authentication token,
29 * associated with the specific object ID and the specific MC
30 * portal; this token must be used in all subsequent commands for
31 * this specific object.
33 * Return: '0' on Success; Error code otherwise.
35 int dpio_open(struct fsl_mc_io *mc_io,
40 struct fsl_mc_command cmd = { 0 };
41 struct dpio_cmd_open *dpio_cmd;
45 cmd.header = mc_encode_cmd_header(DPIO_CMDID_OPEN,
48 dpio_cmd = (struct dpio_cmd_open *)cmd.params;
49 dpio_cmd->dpio_id = cpu_to_le32(dpio_id);
51 err = mc_send_command(mc_io, &cmd);
55 /* retrieve response parameters */
56 *token = mc_cmd_hdr_read_token(&cmd);
62 * dpio_close() - Close the control session of the object
63 * @mc_io: Pointer to MC portal's I/O object
64 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
65 * @token: Token of DPIO object
67 * Return: '0' on Success; Error code otherwise.
69 int dpio_close(struct fsl_mc_io *mc_io,
73 struct fsl_mc_command cmd = { 0 };
76 cmd.header = mc_encode_cmd_header(DPIO_CMDID_CLOSE,
80 return mc_send_command(mc_io, &cmd);
84 * dpio_enable() - Enable the DPIO, allow I/O portal operations.
85 * @mc_io: Pointer to MC portal's I/O object
86 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
87 * @token: Token of DPIO object
89 * Return: '0' on Success; Error code otherwise
91 int dpio_enable(struct fsl_mc_io *mc_io,
95 struct fsl_mc_command cmd = { 0 };
98 cmd.header = mc_encode_cmd_header(DPIO_CMDID_ENABLE,
102 return mc_send_command(mc_io, &cmd);
106 * dpio_disable() - Disable the DPIO, stop any I/O portal operation.
107 * @mc_io: Pointer to MC portal's I/O object
108 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
109 * @token: Token of DPIO object
111 * Return: '0' on Success; Error code otherwise
113 int dpio_disable(struct fsl_mc_io *mc_io,
117 struct fsl_mc_command cmd = { 0 };
119 /* prepare command */
120 cmd.header = mc_encode_cmd_header(DPIO_CMDID_DISABLE,
124 return mc_send_command(mc_io, &cmd);
128 * dpio_get_attributes() - Retrieve DPIO attributes
129 * @mc_io: Pointer to MC portal's I/O object
130 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
131 * @token: Token of DPIO object
132 * @attr: Returned object's attributes
134 * Return: '0' on Success; Error code otherwise
136 int dpio_get_attributes(struct fsl_mc_io *mc_io,
139 struct dpio_attr *attr)
141 struct fsl_mc_command cmd = { 0 };
142 struct dpio_rsp_get_attr *dpio_rsp;
145 /* prepare command */
146 cmd.header = mc_encode_cmd_header(DPIO_CMDID_GET_ATTR,
150 err = mc_send_command(mc_io, &cmd);
154 /* retrieve response parameters */
155 dpio_rsp = (struct dpio_rsp_get_attr *)cmd.params;
156 attr->id = le32_to_cpu(dpio_rsp->id);
157 attr->qbman_portal_id = le16_to_cpu(dpio_rsp->qbman_portal_id);
158 attr->num_priorities = dpio_rsp->num_priorities;
159 attr->channel_mode = dpio_rsp->channel_mode & DPIO_CHANNEL_MODE_MASK;
160 attr->qbman_portal_ce_offset =
161 le64_to_cpu(dpio_rsp->qbman_portal_ce_addr);
162 attr->qbman_portal_ci_offset =
163 le64_to_cpu(dpio_rsp->qbman_portal_ci_addr);
164 attr->qbman_version = le32_to_cpu(dpio_rsp->qbman_version);
170 * dpio_get_api_version - Get Data Path I/O API version
171 * @mc_io: Pointer to MC portal's DPIO object
172 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
173 * @major_ver: Major version of DPIO API
174 * @minor_ver: Minor version of DPIO API
176 * Return: '0' on Success; Error code otherwise
178 int dpio_get_api_version(struct fsl_mc_io *mc_io,
183 struct fsl_mc_command cmd = { 0 };
186 /* prepare command */
187 cmd.header = mc_encode_cmd_header(DPIO_CMDID_GET_API_VERSION,
190 err = mc_send_command(mc_io, &cmd);
194 /* retrieve response parameters */
195 mc_cmd_read_api_version(&cmd, major_ver, minor_ver);