1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2 /* Copyright 2013-2016 Freescale Semiconductor Inc.
3  * Copyright 2019 NXP
4  */
5 #include <linux/fsl/mc.h>
6 #include "dpmac.h"
7 #include "dpmac-cmd.h"
8 
9 /**
10  * dpmac_open() - Open a control session for the specified object.
11  * @mc_io:	Pointer to MC portal's I/O object
12  * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
13  * @dpmac_id:	DPMAC unique ID
14  * @token:	Returned token; use in subsequent API calls
15  *
16  * This function can be used to open a control session for an
17  * already created object; an object may have been declared in
18  * the DPL or by calling the dpmac_create function.
19  * This function returns a unique authentication token,
20  * associated with the specific object ID and the specific MC
21  * portal; this token must be used in all subsequent commands for
22  * this specific object
23  *
24  * Return:	'0' on Success; Error code otherwise.
25  */
26 int dpmac_open(struct fsl_mc_io *mc_io,
27 	       u32 cmd_flags,
28 	       int dpmac_id,
29 	       u16 *token)
30 {
31 	struct dpmac_cmd_open *cmd_params;
32 	struct fsl_mc_command cmd = { 0 };
33 	int err;
34 
35 	/* prepare command */
36 	cmd.header = mc_encode_cmd_header(DPMAC_CMDID_OPEN,
37 					  cmd_flags,
38 					  0);
39 	cmd_params = (struct dpmac_cmd_open *)cmd.params;
40 	cmd_params->dpmac_id = cpu_to_le32(dpmac_id);
41 
42 	/* send command to mc*/
43 	err = mc_send_command(mc_io, &cmd);
44 	if (err)
45 		return err;
46 
47 	/* retrieve response parameters */
48 	*token = mc_cmd_hdr_read_token(&cmd);
49 
50 	return err;
51 }
52 
53 /**
54  * dpmac_close() - Close the control session of the object
55  * @mc_io:	Pointer to MC portal's I/O object
56  * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
57  * @token:	Token of DPMAC object
58  *
59  * After this function is called, no further operations are
60  * allowed on the object without opening a new control session.
61  *
62  * Return:	'0' on Success; Error code otherwise.
63  */
64 int dpmac_close(struct fsl_mc_io *mc_io,
65 		u32 cmd_flags,
66 		u16 token)
67 {
68 	struct fsl_mc_command cmd = { 0 };
69 
70 	/* prepare command */
71 	cmd.header = mc_encode_cmd_header(DPMAC_CMDID_CLOSE, cmd_flags,
72 					  token);
73 
74 	/* send command to mc*/
75 	return mc_send_command(mc_io, &cmd);
76 }
77 
78 /**
79  * dpmac_get_attributes - Retrieve DPMAC attributes.
80  *
81  * @mc_io:	Pointer to MC portal's I/O object
82  * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
83  * @token:	Token of DPMAC object
84  * @attr:	Returned object's attributes
85  *
86  * Return:	'0' on Success; Error code otherwise.
87  */
88 int dpmac_get_attributes(struct fsl_mc_io *mc_io,
89 			 u32 cmd_flags,
90 			 u16 token,
91 			 struct dpmac_attr *attr)
92 {
93 	struct dpmac_rsp_get_attributes *rsp_params;
94 	struct fsl_mc_command cmd = { 0 };
95 	int err;
96 
97 	/* prepare command */
98 	cmd.header = mc_encode_cmd_header(DPMAC_CMDID_GET_ATTR,
99 					  cmd_flags,
100 					  token);
101 
102 	/* send command to mc*/
103 	err = mc_send_command(mc_io, &cmd);
104 	if (err)
105 		return err;
106 
107 	/* retrieve response parameters */
108 	rsp_params = (struct dpmac_rsp_get_attributes *)cmd.params;
109 	attr->eth_if = rsp_params->eth_if;
110 	attr->link_type = rsp_params->link_type;
111 	attr->id = le16_to_cpu(rsp_params->id);
112 	attr->max_rate = le32_to_cpu(rsp_params->max_rate);
113 
114 	return 0;
115 }
116 
117 /**
118  * dpmac_set_link_state() - Set the Ethernet link status
119  * @mc_io:      Pointer to opaque I/O object
120  * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
121  * @token:      Token of DPMAC object
122  * @link_state: Link state configuration
123  *
124  * Return:      '0' on Success; Error code otherwise.
125  */
126 int dpmac_set_link_state(struct fsl_mc_io *mc_io,
127 			 u32 cmd_flags,
128 			 u16 token,
129 			 struct dpmac_link_state *link_state)
130 {
131 	struct dpmac_cmd_set_link_state *cmd_params;
132 	struct fsl_mc_command cmd = { 0 };
133 
134 	/* prepare command */
135 	cmd.header = mc_encode_cmd_header(DPMAC_CMDID_SET_LINK_STATE,
136 					  cmd_flags,
137 					  token);
138 	cmd_params = (struct dpmac_cmd_set_link_state *)cmd.params;
139 	cmd_params->options = cpu_to_le64(link_state->options);
140 	cmd_params->rate = cpu_to_le32(link_state->rate);
141 	dpmac_set_field(cmd_params->state, STATE, link_state->up);
142 	dpmac_set_field(cmd_params->state, STATE_VALID,
143 			link_state->state_valid);
144 	cmd_params->supported = cpu_to_le64(link_state->supported);
145 	cmd_params->advertising = cpu_to_le64(link_state->advertising);
146 
147 	/* send command to mc*/
148 	return mc_send_command(mc_io, &cmd);
149 }
150 
151 /**
152  * dpmac_get_counter() - Read a specific DPMAC counter
153  * @mc_io:	Pointer to opaque I/O object
154  * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
155  * @token:	Token of DPMAC object
156  * @id:		The requested counter ID
157  * @value:	Returned counter value
158  *
159  * Return:	The requested counter; '0' otherwise.
160  */
161 int dpmac_get_counter(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
162 		      enum dpmac_counter_id id, u64 *value)
163 {
164 	struct dpmac_cmd_get_counter *dpmac_cmd;
165 	struct dpmac_rsp_get_counter *dpmac_rsp;
166 	struct fsl_mc_command cmd = { 0 };
167 	int err = 0;
168 
169 	cmd.header = mc_encode_cmd_header(DPMAC_CMDID_GET_COUNTER,
170 					  cmd_flags,
171 					  token);
172 	dpmac_cmd = (struct dpmac_cmd_get_counter *)cmd.params;
173 	dpmac_cmd->id = id;
174 
175 	err = mc_send_command(mc_io, &cmd);
176 	if (err)
177 		return err;
178 
179 	dpmac_rsp = (struct dpmac_rsp_get_counter *)cmd.params;
180 	*value = le64_to_cpu(dpmac_rsp->counter);
181 
182 	return 0;
183 }
184