1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2020-2021 Intel Corporation.
4  */
5 
6 #include "iosm_ipc_chnl_cfg.h"
7 #include "iosm_ipc_coredump.h"
8 #include "iosm_ipc_devlink.h"
9 #include "iosm_ipc_flash.h"
10 
11 /* Coredump list */
12 static struct iosm_coredump_file_info list[IOSM_NOF_CD_REGION] = {
13 	{"report.json", REPORT_JSON_SIZE,},
14 	{"coredump.fcd", COREDUMP_FCD_SIZE,},
15 	{"cdd.log", CDD_LOG_SIZE,},
16 	{"eeprom.bin", EEPROM_BIN_SIZE,},
17 	{"bootcore_trace.bin", BOOTCORE_TRC_BIN_SIZE,},
18 	{"bootcore_prev_trace.bin", BOOTCORE_PREV_TRC_BIN_SIZE,},
19 };
20 
21 /* Get the param values for the specific param ID's */
ipc_devlink_get_param(struct devlink * dl,u32 id,struct devlink_param_gset_ctx * ctx)22 static int ipc_devlink_get_param(struct devlink *dl, u32 id,
23 				 struct devlink_param_gset_ctx *ctx)
24 {
25 	struct iosm_devlink *ipc_devlink = devlink_priv(dl);
26 
27 	if (id == IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH)
28 		ctx->val.vu8 = ipc_devlink->param.erase_full_flash;
29 
30 	return 0;
31 }
32 
33 /* Set the param values for the specific param ID's */
ipc_devlink_set_param(struct devlink * dl,u32 id,struct devlink_param_gset_ctx * ctx)34 static int ipc_devlink_set_param(struct devlink *dl, u32 id,
35 				 struct devlink_param_gset_ctx *ctx)
36 {
37 	struct iosm_devlink *ipc_devlink = devlink_priv(dl);
38 
39 	if (id == IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH)
40 		ipc_devlink->param.erase_full_flash = ctx->val.vu8;
41 
42 	return 0;
43 }
44 
45 /* Devlink param structure array */
46 static const struct devlink_param iosm_devlink_params[] = {
47 	DEVLINK_PARAM_DRIVER(IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH,
48 			     "erase_full_flash", DEVLINK_PARAM_TYPE_BOOL,
49 			     BIT(DEVLINK_PARAM_CMODE_RUNTIME),
50 			     ipc_devlink_get_param, ipc_devlink_set_param,
51 			     NULL),
52 };
53 
54 /* Get devlink flash component type */
55 static enum iosm_flash_comp_type
ipc_devlink_get_flash_comp_type(const char comp_str[],u32 len)56 ipc_devlink_get_flash_comp_type(const char comp_str[], u32 len)
57 {
58 	enum iosm_flash_comp_type fls_type;
59 
60 	if (!strncmp("PSI", comp_str, len))
61 		fls_type = FLASH_COMP_TYPE_PSI;
62 	else if (!strncmp("EBL", comp_str, len))
63 		fls_type = FLASH_COMP_TYPE_EBL;
64 	else if (!strncmp("FLS", comp_str, len))
65 		fls_type = FLASH_COMP_TYPE_FLS;
66 	else
67 		fls_type = FLASH_COMP_TYPE_INVAL;
68 
69 	return fls_type;
70 }
71 
72 /* Function triggered on devlink flash command
73  * Flash update function which calls multiple functions based on
74  * component type specified in the flash command
75  */
ipc_devlink_flash_update(struct devlink * devlink,struct devlink_flash_update_params * params,struct netlink_ext_ack * extack)76 static int ipc_devlink_flash_update(struct devlink *devlink,
77 				    struct devlink_flash_update_params *params,
78 				    struct netlink_ext_ack *extack)
79 {
80 	struct iosm_devlink *ipc_devlink = devlink_priv(devlink);
81 	enum iosm_flash_comp_type fls_type;
82 	struct iosm_devlink_image *header;
83 	int rc = -EINVAL;
84 	u8 *mdm_rsp;
85 
86 	header = (struct iosm_devlink_image *)params->fw->data;
87 
88 	if (!header || params->fw->size <= IOSM_DEVLINK_HDR_SIZE ||
89 	    (memcmp(header->magic_header, IOSM_DEVLINK_MAGIC_HEADER,
90 	     IOSM_DEVLINK_MAGIC_HEADER_LEN) != 0))
91 		return -EINVAL;
92 
93 	mdm_rsp = kzalloc(IOSM_EBL_DW_PACK_SIZE, GFP_KERNEL);
94 	if (!mdm_rsp)
95 		return -ENOMEM;
96 
97 	fls_type = ipc_devlink_get_flash_comp_type(header->image_type,
98 						   IOSM_DEVLINK_MAX_IMG_LEN);
99 
100 	switch (fls_type) {
101 	case FLASH_COMP_TYPE_PSI:
102 		rc = ipc_flash_boot_psi(ipc_devlink, params->fw);
103 		break;
104 	case FLASH_COMP_TYPE_EBL:
105 		rc = ipc_flash_boot_ebl(ipc_devlink, params->fw);
106 		if (rc)
107 			break;
108 		rc = ipc_flash_boot_set_capabilities(ipc_devlink, mdm_rsp);
109 		if (rc)
110 			break;
111 		rc = ipc_flash_read_swid(ipc_devlink, mdm_rsp);
112 		break;
113 	case FLASH_COMP_TYPE_FLS:
114 		rc = ipc_flash_send_fls(ipc_devlink, params->fw, mdm_rsp);
115 		break;
116 	default:
117 		devlink_flash_update_status_notify(devlink, "Invalid component",
118 						   NULL, 0, 0);
119 		break;
120 	}
121 
122 	if (!rc)
123 		devlink_flash_update_status_notify(devlink, "Flashing success",
124 						   header->image_type, 0, 0);
125 	else
126 		devlink_flash_update_status_notify(devlink, "Flashing failed",
127 						   header->image_type, 0, 0);
128 
129 	kfree(mdm_rsp);
130 	return rc;
131 }
132 
133 /* Call back function for devlink ops */
134 static const struct devlink_ops devlink_flash_ops = {
135 	.flash_update = ipc_devlink_flash_update,
136 };
137 
138 /**
139  * ipc_devlink_send_cmd - Send command to Modem
140  * @ipc_devlink: Pointer to struct iosm_devlink
141  * @cmd:         Command to be sent to modem
142  * @entry:       Command entry number
143  *
144  * Returns:      0 on success and failure value on error
145  */
ipc_devlink_send_cmd(struct iosm_devlink * ipc_devlink,u16 cmd,u32 entry)146 int ipc_devlink_send_cmd(struct iosm_devlink *ipc_devlink, u16 cmd, u32 entry)
147 {
148 	struct iosm_rpsi_cmd rpsi_cmd;
149 
150 	rpsi_cmd.param.dword = cpu_to_le32(entry);
151 	rpsi_cmd.cmd = cpu_to_le16(cmd);
152 	rpsi_cmd.crc = rpsi_cmd.param.word[0] ^ rpsi_cmd.param.word[1] ^
153 		       rpsi_cmd.cmd;
154 
155 	return ipc_imem_sys_devlink_write(ipc_devlink, (u8 *)&rpsi_cmd,
156 					  sizeof(rpsi_cmd));
157 }
158 
159 /* Function to create snapshot */
ipc_devlink_coredump_snapshot(struct devlink * dl,const struct devlink_region_ops * ops,struct netlink_ext_ack * extack,u8 ** data)160 static int ipc_devlink_coredump_snapshot(struct devlink *dl,
161 					 const struct devlink_region_ops *ops,
162 					 struct netlink_ext_ack *extack,
163 					 u8 **data)
164 {
165 	struct iosm_devlink *ipc_devlink = devlink_priv(dl);
166 	struct iosm_coredump_file_info *cd_list = ops->priv;
167 	u32 region_size;
168 	int rc;
169 
170 	dev_dbg(ipc_devlink->dev, "Region:%s, ID:%d", ops->name,
171 		cd_list->entry);
172 	region_size = cd_list->default_size;
173 	rc = ipc_coredump_collect(ipc_devlink, data, cd_list->entry,
174 				  region_size);
175 	if (rc) {
176 		dev_err(ipc_devlink->dev, "Fail to create snapshot,err %d", rc);
177 		goto coredump_collect_err;
178 	}
179 
180 	/* Send coredump end cmd indicating end of coredump collection */
181 	if (cd_list->entry == (IOSM_NOF_CD_REGION - 1))
182 		ipc_coredump_get_list(ipc_devlink, rpsi_cmd_coredump_end);
183 
184 	return 0;
185 
186 coredump_collect_err:
187 	ipc_coredump_get_list(ipc_devlink, rpsi_cmd_coredump_end);
188 	return rc;
189 }
190 
191 /* To create regions for coredump files */
ipc_devlink_create_region(struct iosm_devlink * devlink)192 static int ipc_devlink_create_region(struct iosm_devlink *devlink)
193 {
194 	struct devlink_region_ops *mdm_coredump;
195 	int rc = 0;
196 	int i;
197 
198 	mdm_coredump = devlink->iosm_devlink_mdm_coredump;
199 	for (i = 0; i < IOSM_NOF_CD_REGION; i++) {
200 		mdm_coredump[i].name = list[i].filename;
201 		mdm_coredump[i].snapshot = ipc_devlink_coredump_snapshot;
202 		mdm_coredump[i].destructor = vfree;
203 		devlink->cd_regions[i] =
204 			devlink_region_create(devlink->devlink_ctx,
205 					      &mdm_coredump[i], MAX_SNAPSHOTS,
206 					      list[i].default_size);
207 
208 		if (IS_ERR(devlink->cd_regions[i])) {
209 			rc = PTR_ERR(devlink->cd_regions[i]);
210 			dev_err(devlink->dev, "Devlink region fail,err %d", rc);
211 			/* Delete previously created regions */
212 			for ( ; i >= 0; i--)
213 				devlink_region_destroy(devlink->cd_regions[i]);
214 			goto region_create_fail;
215 		}
216 		list[i].entry = i;
217 		mdm_coredump[i].priv = list + i;
218 	}
219 region_create_fail:
220 	return rc;
221 }
222 
223 /* To Destroy devlink regions */
ipc_devlink_destroy_region(struct iosm_devlink * ipc_devlink)224 static void ipc_devlink_destroy_region(struct iosm_devlink *ipc_devlink)
225 {
226 	u8 i;
227 
228 	for (i = 0; i < IOSM_NOF_CD_REGION; i++)
229 		devlink_region_destroy(ipc_devlink->cd_regions[i]);
230 }
231 
232 /**
233  * ipc_devlink_init - Initialize/register devlink to IOSM driver
234  * @ipc_imem:   Pointer to struct iosm_imem
235  *
236  * Returns:     Pointer to iosm_devlink on success and NULL on failure
237  */
ipc_devlink_init(struct iosm_imem * ipc_imem)238 struct iosm_devlink *ipc_devlink_init(struct iosm_imem *ipc_imem)
239 {
240 	struct ipc_chnl_cfg chnl_cfg_flash = { 0 };
241 	struct iosm_devlink *ipc_devlink;
242 	struct devlink *devlink_ctx;
243 	int rc;
244 
245 	devlink_ctx = devlink_alloc(&devlink_flash_ops,
246 				    sizeof(struct iosm_devlink),
247 				    ipc_imem->dev);
248 	if (!devlink_ctx) {
249 		dev_err(ipc_imem->dev, "devlink_alloc failed");
250 		goto devlink_alloc_fail;
251 	}
252 
253 	ipc_devlink = devlink_priv(devlink_ctx);
254 	ipc_devlink->devlink_ctx = devlink_ctx;
255 	ipc_devlink->pcie = ipc_imem->pcie;
256 	ipc_devlink->dev = ipc_imem->dev;
257 
258 	rc = devlink_params_register(devlink_ctx, iosm_devlink_params,
259 				     ARRAY_SIZE(iosm_devlink_params));
260 	if (rc) {
261 		dev_err(ipc_devlink->dev,
262 			"devlink_params_register failed. rc %d", rc);
263 		goto param_reg_fail;
264 	}
265 
266 	ipc_devlink->cd_file_info = list;
267 
268 	rc = ipc_devlink_create_region(ipc_devlink);
269 	if (rc) {
270 		dev_err(ipc_devlink->dev, "Devlink Region create failed, rc %d",
271 			rc);
272 		goto region_create_fail;
273 	}
274 
275 	if (ipc_chnl_cfg_get(&chnl_cfg_flash, IPC_MEM_CTRL_CHL_ID_7) < 0)
276 		goto chnl_get_fail;
277 
278 	ipc_imem_channel_init(ipc_imem, IPC_CTYPE_CTRL,
279 			      chnl_cfg_flash, IRQ_MOD_OFF);
280 
281 	init_completion(&ipc_devlink->devlink_sio.read_sem);
282 	skb_queue_head_init(&ipc_devlink->devlink_sio.rx_list);
283 
284 	devlink_register(devlink_ctx);
285 	dev_dbg(ipc_devlink->dev, "iosm devlink register success");
286 
287 	return ipc_devlink;
288 
289 chnl_get_fail:
290 	ipc_devlink_destroy_region(ipc_devlink);
291 region_create_fail:
292 	devlink_params_unregister(devlink_ctx, iosm_devlink_params,
293 				  ARRAY_SIZE(iosm_devlink_params));
294 param_reg_fail:
295 	devlink_free(devlink_ctx);
296 devlink_alloc_fail:
297 	return NULL;
298 }
299 
300 /**
301  * ipc_devlink_deinit - To unintialize the devlink from IOSM driver.
302  * @ipc_devlink:        Devlink instance
303  */
ipc_devlink_deinit(struct iosm_devlink * ipc_devlink)304 void ipc_devlink_deinit(struct iosm_devlink *ipc_devlink)
305 {
306 	struct devlink *devlink_ctx = ipc_devlink->devlink_ctx;
307 
308 	devlink_unregister(devlink_ctx);
309 	ipc_devlink_destroy_region(ipc_devlink);
310 	devlink_params_unregister(devlink_ctx, iosm_devlink_params,
311 				  ARRAY_SIZE(iosm_devlink_params));
312 	if (ipc_devlink->devlink_sio.devlink_read_pend) {
313 		complete(&ipc_devlink->devlink_sio.read_sem);
314 		complete(&ipc_devlink->devlink_sio.channel->ul_sem);
315 	}
316 	if (!ipc_devlink->devlink_sio.devlink_read_pend)
317 		skb_queue_purge(&ipc_devlink->devlink_sio.rx_list);
318 
319 	ipc_imem_sys_devlink_close(ipc_devlink);
320 	devlink_free(devlink_ctx);
321 }
322