Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 1 | /* |
| 2 | * SVC Greybus driver. |
| 3 | * |
| 4 | * Copyright 2015 Google Inc. |
| 5 | * Copyright 2015 Linaro Ltd. |
| 6 | * |
| 7 | * Released under the GPLv2 only. |
| 8 | */ |
| 9 | |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
Viresh Kumar | 067906f | 2015-08-06 12:44:55 +0530 | [diff] [blame] | 11 | #include <linux/workqueue.h> |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 12 | |
Viresh Kumar | f66427a | 2015-09-02 21:27:13 +0530 | [diff] [blame] | 13 | #include "greybus.h" |
| 14 | |
Johan Hovold | f6c6c13 | 2015-11-11 10:07:08 +0100 | [diff] [blame^] | 15 | #define CPORT_FLAGS_E2EFC BIT(0) |
| 16 | #define CPORT_FLAGS_CSD_N BIT(1) |
| 17 | #define CPORT_FLAGS_CSV_N BIT(2) |
Perry Hung | 0b22649 | 2015-07-24 19:02:34 -0400 | [diff] [blame] | 18 | |
Viresh Kumar | 3ccb160 | 2015-09-03 15:42:22 +0530 | [diff] [blame] | 19 | enum gb_svc_state { |
| 20 | GB_SVC_STATE_RESET, |
| 21 | GB_SVC_STATE_PROTOCOL_VERSION, |
| 22 | GB_SVC_STATE_SVC_HELLO, |
| 23 | }; |
| 24 | |
Viresh Kumar | b45864d | 2015-07-24 15:32:21 +0530 | [diff] [blame] | 25 | struct gb_svc { |
| 26 | struct gb_connection *connection; |
Viresh Kumar | 3ccb160 | 2015-09-03 15:42:22 +0530 | [diff] [blame] | 27 | enum gb_svc_state state; |
Johan Hovold | c09db18 | 2015-09-15 09:18:08 +0200 | [diff] [blame] | 28 | struct ida device_id_map; |
Viresh Kumar | b45864d | 2015-07-24 15:32:21 +0530 | [diff] [blame] | 29 | }; |
| 30 | |
Viresh Kumar | 067906f | 2015-08-06 12:44:55 +0530 | [diff] [blame] | 31 | struct svc_hotplug { |
| 32 | struct work_struct work; |
| 33 | struct gb_connection *connection; |
| 34 | struct gb_svc_intf_hotplug_request data; |
| 35 | }; |
| 36 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 37 | |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 38 | /* |
| 39 | * AP's SVC cport is required early to get messages from the SVC. This happens |
| 40 | * even before the Endo is created and hence any modules or interfaces. |
| 41 | * |
| 42 | * This is a temporary connection, used only at initial bootup. |
| 43 | */ |
| 44 | struct gb_connection * |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 45 | gb_ap_svc_connection_create(struct gb_host_device *hd) |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 46 | { |
| 47 | struct gb_connection *connection; |
| 48 | |
| 49 | connection = gb_connection_create_range(hd, NULL, hd->parent, |
| 50 | GB_SVC_CPORT_ID, |
| 51 | GREYBUS_PROTOCOL_SVC, |
| 52 | GB_SVC_CPORT_ID, |
| 53 | GB_SVC_CPORT_ID + 1); |
| 54 | |
| 55 | return connection; |
| 56 | } |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 57 | |
| 58 | /* |
| 59 | * We know endo-type and AP's interface id now, lets create a proper svc |
| 60 | * connection (and its interface/bundle) now and get rid of the initial |
| 61 | * 'partially' initialized one svc connection. |
| 62 | */ |
| 63 | static struct gb_interface * |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 64 | gb_ap_interface_create(struct gb_host_device *hd, |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 65 | struct gb_connection *connection, u8 interface_id) |
| 66 | { |
| 67 | struct gb_interface *intf; |
| 68 | struct device *dev = &hd->endo->dev; |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 69 | |
| 70 | intf = gb_interface_create(hd, interface_id); |
| 71 | if (!intf) { |
| 72 | dev_err(dev, "%s: Failed to create interface with id %hhu\n", |
| 73 | __func__, interface_id); |
| 74 | return NULL; |
| 75 | } |
| 76 | |
| 77 | intf->device_id = GB_DEVICE_ID_AP; |
Viresh Kumar | 67c93ae | 2015-07-24 15:32:19 +0530 | [diff] [blame] | 78 | svc_update_connection(intf, connection); |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 79 | |
Viresh Kumar | dcd0500 | 2015-07-24 15:32:20 +0530 | [diff] [blame] | 80 | /* Its no longer a partially initialized connection */ |
| 81 | hd->initial_svc_connection = NULL; |
| 82 | |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 83 | return intf; |
| 84 | } |
| 85 | |
Viresh Kumar | 505f16c | 2015-08-31 17:21:07 +0530 | [diff] [blame] | 86 | static int gb_svc_intf_device_id(struct gb_svc *svc, u8 intf_id, u8 device_id) |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 87 | { |
| 88 | struct gb_svc_intf_device_id_request request; |
| 89 | |
| 90 | request.intf_id = intf_id; |
| 91 | request.device_id = device_id; |
| 92 | |
| 93 | return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_DEVICE_ID, |
| 94 | &request, sizeof(request), NULL, 0); |
| 95 | } |
| 96 | |
Viresh Kumar | 3f0e918 | 2015-08-31 17:21:06 +0530 | [diff] [blame] | 97 | int gb_svc_intf_reset(struct gb_svc *svc, u8 intf_id) |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 98 | { |
| 99 | struct gb_svc_intf_reset_request request; |
| 100 | |
| 101 | request.intf_id = intf_id; |
| 102 | |
| 103 | return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_RESET, |
| 104 | &request, sizeof(request), NULL, 0); |
| 105 | } |
Viresh Kumar | 3f0e918 | 2015-08-31 17:21:06 +0530 | [diff] [blame] | 106 | EXPORT_SYMBOL_GPL(gb_svc_intf_reset); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 107 | |
Viresh Kumar | 19151c3 | 2015-09-09 21:08:29 +0530 | [diff] [blame] | 108 | int gb_svc_dme_peer_get(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector, |
| 109 | u32 *value) |
| 110 | { |
| 111 | struct gb_svc_dme_peer_get_request request; |
| 112 | struct gb_svc_dme_peer_get_response response; |
| 113 | u16 result; |
| 114 | int ret; |
| 115 | |
| 116 | request.intf_id = intf_id; |
| 117 | request.attr = cpu_to_le16(attr); |
| 118 | request.selector = cpu_to_le16(selector); |
| 119 | |
| 120 | ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_DME_PEER_GET, |
| 121 | &request, sizeof(request), |
| 122 | &response, sizeof(response)); |
| 123 | if (ret) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 124 | pr_err("failed to get DME attribute (%hhu %hx %hu) %d\n", |
| 125 | intf_id, attr, selector, ret); |
Viresh Kumar | 19151c3 | 2015-09-09 21:08:29 +0530 | [diff] [blame] | 126 | return ret; |
| 127 | } |
| 128 | |
| 129 | result = le16_to_cpu(response.result_code); |
| 130 | if (result) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 131 | pr_err("Unipro error %hu while getting DME attribute (%hhu %hx %hu)\n", |
| 132 | result, intf_id, attr, selector); |
Viresh Kumar | 19151c3 | 2015-09-09 21:08:29 +0530 | [diff] [blame] | 133 | return -EINVAL; |
| 134 | } |
| 135 | |
| 136 | if (value) |
| 137 | *value = le32_to_cpu(response.attr_value); |
| 138 | |
| 139 | return 0; |
| 140 | } |
| 141 | EXPORT_SYMBOL_GPL(gb_svc_dme_peer_get); |
| 142 | |
| 143 | int gb_svc_dme_peer_set(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector, |
| 144 | u32 value) |
| 145 | { |
| 146 | struct gb_svc_dme_peer_set_request request; |
| 147 | struct gb_svc_dme_peer_set_response response; |
| 148 | u16 result; |
| 149 | int ret; |
| 150 | |
| 151 | request.intf_id = intf_id; |
| 152 | request.attr = cpu_to_le16(attr); |
| 153 | request.selector = cpu_to_le16(selector); |
| 154 | request.value = cpu_to_le32(value); |
| 155 | |
| 156 | ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_DME_PEER_SET, |
| 157 | &request, sizeof(request), |
| 158 | &response, sizeof(response)); |
| 159 | if (ret) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 160 | pr_err("failed to set DME attribute (%hhu %hx %hu %u) %d\n", |
| 161 | intf_id, attr, selector, value, ret); |
Viresh Kumar | 19151c3 | 2015-09-09 21:08:29 +0530 | [diff] [blame] | 162 | return ret; |
| 163 | } |
| 164 | |
| 165 | result = le16_to_cpu(response.result_code); |
| 166 | if (result) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 167 | pr_err("Unipro error %hu while setting DME attribute (%hhu %hx %hu %u)\n", |
| 168 | result, intf_id, attr, selector, value); |
Viresh Kumar | 19151c3 | 2015-09-09 21:08:29 +0530 | [diff] [blame] | 169 | return -EINVAL; |
| 170 | } |
| 171 | |
| 172 | return 0; |
| 173 | } |
| 174 | EXPORT_SYMBOL_GPL(gb_svc_dme_peer_set); |
| 175 | |
Viresh Kumar | 6bec5c7 | 2015-09-24 14:40:29 -0700 | [diff] [blame] | 176 | /* |
| 177 | * T_TstSrcIncrement is written by the module on ES2 as a stand-in for boot |
| 178 | * status attribute. AP needs to read and clear it, after reading a non-zero |
| 179 | * value from it. |
| 180 | * |
| 181 | * FIXME: This is module-hardware dependent and needs to be extended for every |
| 182 | * type of module we want to support. |
| 183 | */ |
| 184 | static int gb_svc_read_and_clear_module_boot_status(struct gb_interface *intf) |
| 185 | { |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 186 | struct gb_host_device *hd = intf->hd; |
Viresh Kumar | 6bec5c7 | 2015-09-24 14:40:29 -0700 | [diff] [blame] | 187 | int ret; |
| 188 | u32 value; |
| 189 | |
| 190 | /* Read and clear boot status in T_TstSrcIncrement */ |
| 191 | ret = gb_svc_dme_peer_get(hd->svc, intf->interface_id, |
| 192 | DME_ATTR_T_TST_SRC_INCREMENT, |
| 193 | DME_ATTR_SELECTOR_INDEX, &value); |
| 194 | |
| 195 | if (ret) |
| 196 | return ret; |
| 197 | |
| 198 | /* |
| 199 | * A nonzero boot status indicates the module has finished |
| 200 | * booting. Clear it. |
| 201 | */ |
| 202 | if (!value) { |
| 203 | dev_err(&intf->dev, "Module not ready yet\n"); |
| 204 | return -ENODEV; |
| 205 | } |
| 206 | |
Viresh Kumar | 1575ef1 | 2015-10-07 15:40:24 -0400 | [diff] [blame] | 207 | /* |
| 208 | * Check if the module needs to boot from unipro. |
| 209 | * For ES2: We need to check lowest 8 bits of 'value'. |
| 210 | * For ES3: We need to check highest 8 bits out of 32 of 'value'. |
| 211 | * |
| 212 | * FIXME: Add code to find if we are on ES2 or ES3 to have separate |
| 213 | * checks. |
| 214 | */ |
| 215 | if (value == DME_TSI_UNIPRO_BOOT_STARTED || |
| 216 | value == DME_TSI_FALLBACK_UNIPRO_BOOT_STARTED) |
| 217 | intf->boot_over_unipro = true; |
| 218 | |
Viresh Kumar | 6bec5c7 | 2015-09-24 14:40:29 -0700 | [diff] [blame] | 219 | return gb_svc_dme_peer_set(hd->svc, intf->interface_id, |
| 220 | DME_ATTR_T_TST_SRC_INCREMENT, |
| 221 | DME_ATTR_SELECTOR_INDEX, 0); |
| 222 | } |
| 223 | |
Viresh Kumar | 3f0e918 | 2015-08-31 17:21:06 +0530 | [diff] [blame] | 224 | int gb_svc_connection_create(struct gb_svc *svc, |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 225 | u8 intf1_id, u16 cport1_id, |
Viresh Kumar | 1575ef1 | 2015-10-07 15:40:24 -0400 | [diff] [blame] | 226 | u8 intf2_id, u16 cport2_id, |
| 227 | bool boot_over_unipro) |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 228 | { |
| 229 | struct gb_svc_conn_create_request request; |
| 230 | |
| 231 | request.intf1_id = intf1_id; |
Rui Miguel Silva | 2498050 | 2015-09-15 15:33:51 +0100 | [diff] [blame] | 232 | request.cport1_id = cpu_to_le16(cport1_id); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 233 | request.intf2_id = intf2_id; |
Rui Miguel Silva | 2498050 | 2015-09-15 15:33:51 +0100 | [diff] [blame] | 234 | request.cport2_id = cpu_to_le16(cport2_id); |
Perry Hung | 0b22649 | 2015-07-24 19:02:34 -0400 | [diff] [blame] | 235 | /* |
| 236 | * XXX: fix connections paramaters to TC0 and all CPort flags |
| 237 | * for now. |
| 238 | */ |
| 239 | request.tc = 0; |
Viresh Kumar | 1575ef1 | 2015-10-07 15:40:24 -0400 | [diff] [blame] | 240 | |
| 241 | /* |
| 242 | * We need to skip setting E2EFC and other flags to the connection |
| 243 | * create request, for all cports, on an interface that need to boot |
| 244 | * over unipro, i.e. interfaces required to download firmware. |
| 245 | */ |
| 246 | if (boot_over_unipro) |
| 247 | request.flags = CPORT_FLAGS_CSV_N | CPORT_FLAGS_CSD_N; |
| 248 | else |
| 249 | request.flags = CPORT_FLAGS_CSV_N | CPORT_FLAGS_E2EFC; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 250 | |
| 251 | return gb_operation_sync(svc->connection, GB_SVC_TYPE_CONN_CREATE, |
| 252 | &request, sizeof(request), NULL, 0); |
| 253 | } |
Viresh Kumar | 3f0e918 | 2015-08-31 17:21:06 +0530 | [diff] [blame] | 254 | EXPORT_SYMBOL_GPL(gb_svc_connection_create); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 255 | |
Viresh Kumar | 3f0e918 | 2015-08-31 17:21:06 +0530 | [diff] [blame] | 256 | void gb_svc_connection_destroy(struct gb_svc *svc, u8 intf1_id, u16 cport1_id, |
| 257 | u8 intf2_id, u16 cport2_id) |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 258 | { |
| 259 | struct gb_svc_conn_destroy_request request; |
Viresh Kumar | d9fcfff | 2015-08-31 17:21:05 +0530 | [diff] [blame] | 260 | struct gb_connection *connection = svc->connection; |
| 261 | int ret; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 262 | |
| 263 | request.intf1_id = intf1_id; |
Rui Miguel Silva | 2498050 | 2015-09-15 15:33:51 +0100 | [diff] [blame] | 264 | request.cport1_id = cpu_to_le16(cport1_id); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 265 | request.intf2_id = intf2_id; |
Rui Miguel Silva | 2498050 | 2015-09-15 15:33:51 +0100 | [diff] [blame] | 266 | request.cport2_id = cpu_to_le16(cport2_id); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 267 | |
Viresh Kumar | d9fcfff | 2015-08-31 17:21:05 +0530 | [diff] [blame] | 268 | ret = gb_operation_sync(connection, GB_SVC_TYPE_CONN_DESTROY, |
| 269 | &request, sizeof(request), NULL, 0); |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 270 | if (ret) |
Johan Hovold | 35a84ba | 2015-11-11 10:07:07 +0100 | [diff] [blame] | 271 | pr_err("failed to destroy connection (%hhu:%hu %hhu:%hu) %d\n", |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 272 | intf1_id, cport1_id, intf2_id, cport2_id, ret); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 273 | } |
Viresh Kumar | 3f0e918 | 2015-08-31 17:21:06 +0530 | [diff] [blame] | 274 | EXPORT_SYMBOL_GPL(gb_svc_connection_destroy); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 275 | |
Viresh Kumar | bb10685 | 2015-09-07 16:01:25 +0530 | [diff] [blame] | 276 | /* Creates bi-directional routes between the devices */ |
Viresh Kumar | 505f16c | 2015-08-31 17:21:07 +0530 | [diff] [blame] | 277 | static int gb_svc_route_create(struct gb_svc *svc, u8 intf1_id, u8 dev1_id, |
| 278 | u8 intf2_id, u8 dev2_id) |
Perry Hung | e08aaa4 | 2015-07-24 19:02:31 -0400 | [diff] [blame] | 279 | { |
| 280 | struct gb_svc_route_create_request request; |
| 281 | |
| 282 | request.intf1_id = intf1_id; |
| 283 | request.dev1_id = dev1_id; |
| 284 | request.intf2_id = intf2_id; |
| 285 | request.dev2_id = dev2_id; |
| 286 | |
| 287 | return gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_CREATE, |
| 288 | &request, sizeof(request), NULL, 0); |
| 289 | } |
Perry Hung | e08aaa4 | 2015-07-24 19:02:31 -0400 | [diff] [blame] | 290 | |
Viresh Kumar | 0a02057 | 2015-09-07 18:05:26 +0530 | [diff] [blame] | 291 | /* Destroys bi-directional routes between the devices */ |
| 292 | static void gb_svc_route_destroy(struct gb_svc *svc, u8 intf1_id, u8 intf2_id) |
| 293 | { |
| 294 | struct gb_svc_route_destroy_request request; |
| 295 | int ret; |
| 296 | |
| 297 | request.intf1_id = intf1_id; |
| 298 | request.intf2_id = intf2_id; |
| 299 | |
| 300 | ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_DESTROY, |
| 301 | &request, sizeof(request), NULL, 0); |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 302 | if (ret) |
Johan Hovold | 35a84ba | 2015-11-11 10:07:07 +0100 | [diff] [blame] | 303 | pr_err("failed to destroy route (%hhu %hhu) %d\n", |
Viresh Kumar | 0a02057 | 2015-09-07 18:05:26 +0530 | [diff] [blame] | 304 | intf1_id, intf2_id, ret); |
Viresh Kumar | 0a02057 | 2015-09-07 18:05:26 +0530 | [diff] [blame] | 305 | } |
| 306 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 307 | static int gb_svc_version_request(struct gb_operation *op) |
| 308 | { |
| 309 | struct gb_connection *connection = op->connection; |
Johan Hovold | cfb1690 | 2015-09-15 10:48:01 +0200 | [diff] [blame] | 310 | struct gb_protocol_version_request *request; |
| 311 | struct gb_protocol_version_response *response; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 312 | |
Johan Hovold | cfb1690 | 2015-09-15 10:48:01 +0200 | [diff] [blame] | 313 | request = op->request->payload; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 314 | |
Johan Hovold | cfb1690 | 2015-09-15 10:48:01 +0200 | [diff] [blame] | 315 | if (request->major > GB_SVC_VERSION_MAJOR) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 316 | pr_err("%d: unsupported major version (%hhu > %hhu)\n", |
| 317 | connection->intf_cport_id, request->major, |
| 318 | GB_SVC_VERSION_MAJOR); |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 319 | return -ENOTSUPP; |
| 320 | } |
| 321 | |
Johan Hovold | cfb1690 | 2015-09-15 10:48:01 +0200 | [diff] [blame] | 322 | connection->module_major = request->major; |
| 323 | connection->module_minor = request->minor; |
Viresh Kumar | 3ea959e3 | 2015-08-11 07:36:14 +0530 | [diff] [blame] | 324 | |
Johan Hovold | cfb1690 | 2015-09-15 10:48:01 +0200 | [diff] [blame] | 325 | if (!gb_operation_response_alloc(op, sizeof(*response), GFP_KERNEL)) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 326 | pr_err("%d: error allocating response\n", |
| 327 | connection->intf_cport_id); |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 328 | return -ENOMEM; |
| 329 | } |
| 330 | |
Johan Hovold | cfb1690 | 2015-09-15 10:48:01 +0200 | [diff] [blame] | 331 | response = op->response->payload; |
| 332 | response->major = connection->module_major; |
| 333 | response->minor = connection->module_minor; |
Johan Hovold | 5983293 | 2015-09-15 10:48:00 +0200 | [diff] [blame] | 334 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | static int gb_svc_hello(struct gb_operation *op) |
| 339 | { |
| 340 | struct gb_connection *connection = op->connection; |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 341 | struct gb_host_device *hd = connection->hd; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 342 | struct gb_svc_hello_request *hello_request; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 343 | struct gb_interface *intf; |
| 344 | u16 endo_id; |
| 345 | u8 interface_id; |
| 346 | int ret; |
| 347 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 348 | /* |
| 349 | * SVC sends information about the endo and interface-id on the hello |
| 350 | * request, use that to create an endo. |
| 351 | */ |
Viresh Kumar | 0c32d2a | 2015-08-11 07:29:19 +0530 | [diff] [blame] | 352 | if (op->request->payload_size < sizeof(*hello_request)) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 353 | pr_err("%d: Illegal size of hello request (%zu < %zu)\n", |
| 354 | connection->intf_cport_id, op->request->payload_size, |
| 355 | sizeof(*hello_request)); |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 356 | return -EINVAL; |
| 357 | } |
| 358 | |
| 359 | hello_request = op->request->payload; |
| 360 | endo_id = le16_to_cpu(hello_request->endo_id); |
| 361 | interface_id = hello_request->interface_id; |
| 362 | |
| 363 | /* Setup Endo */ |
| 364 | ret = greybus_endo_setup(hd, endo_id, interface_id); |
| 365 | if (ret) |
| 366 | return ret; |
| 367 | |
| 368 | /* |
| 369 | * Endo and its modules are ready now, fix AP's partially initialized |
| 370 | * svc protocol and its connection. |
| 371 | */ |
| 372 | intf = gb_ap_interface_create(hd, connection, interface_id); |
| 373 | if (!intf) { |
| 374 | gb_endo_remove(hd->endo); |
| 375 | return ret; |
| 376 | } |
| 377 | |
| 378 | return 0; |
| 379 | } |
| 380 | |
Viresh Kumar | bbaca71 | 2015-09-23 16:48:08 -0700 | [diff] [blame] | 381 | static void svc_intf_remove(struct gb_connection *connection, |
| 382 | struct gb_interface *intf) |
| 383 | { |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 384 | struct gb_host_device *hd = connection->hd; |
Viresh Kumar | bbaca71 | 2015-09-23 16:48:08 -0700 | [diff] [blame] | 385 | struct gb_svc *svc = connection->private; |
| 386 | u8 intf_id = intf->interface_id; |
| 387 | u8 device_id; |
| 388 | |
| 389 | device_id = intf->device_id; |
Viresh Kumar | 80d1ede | 2015-09-23 16:48:10 -0700 | [diff] [blame] | 390 | gb_interface_remove(intf); |
Viresh Kumar | bbaca71 | 2015-09-23 16:48:08 -0700 | [diff] [blame] | 391 | |
| 392 | /* |
| 393 | * Destroy the two-way route between the AP and the interface. |
| 394 | */ |
| 395 | gb_svc_route_destroy(svc, hd->endo->ap_intf_id, intf_id); |
| 396 | |
| 397 | ida_simple_remove(&svc->device_id_map, device_id); |
| 398 | } |
| 399 | |
Viresh Kumar | 067906f | 2015-08-06 12:44:55 +0530 | [diff] [blame] | 400 | /* |
| 401 | * 'struct svc_hotplug' should be freed by svc_process_hotplug() before it |
| 402 | * returns, irrespective of success or Failure in bringing up the module. |
| 403 | */ |
| 404 | static void svc_process_hotplug(struct work_struct *work) |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 405 | { |
Viresh Kumar | 067906f | 2015-08-06 12:44:55 +0530 | [diff] [blame] | 406 | struct svc_hotplug *svc_hotplug = container_of(work, struct svc_hotplug, |
| 407 | work); |
| 408 | struct gb_svc_intf_hotplug_request *hotplug = &svc_hotplug->data; |
| 409 | struct gb_connection *connection = svc_hotplug->connection; |
| 410 | struct gb_svc *svc = connection->private; |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 411 | struct gb_host_device *hd = connection->hd; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 412 | struct gb_interface *intf; |
| 413 | u8 intf_id, device_id; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 414 | int ret; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 415 | |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 416 | /* |
| 417 | * Grab the information we need. |
Viresh Kumar | 7eb8919 | 2015-07-01 12:13:50 +0530 | [diff] [blame] | 418 | */ |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 419 | intf_id = hotplug->intf_id; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 420 | |
Viresh Kumar | bbaca71 | 2015-09-23 16:48:08 -0700 | [diff] [blame] | 421 | intf = gb_interface_find(hd, intf_id); |
| 422 | if (intf) { |
| 423 | /* |
| 424 | * We have received a hotplug request for an interface that |
| 425 | * already exists. |
| 426 | * |
| 427 | * This can happen in cases like: |
| 428 | * - bootrom loading the firmware image and booting into that, |
| 429 | * which only generates a hotplug event. i.e. no hot-unplug |
| 430 | * event. |
| 431 | * - Or the firmware on the module crashed and sent hotplug |
| 432 | * request again to the SVC, which got propagated to AP. |
| 433 | * |
| 434 | * Remove the interface and add it again, and let user know |
| 435 | * about this with a print message. |
| 436 | */ |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 437 | pr_info("%d: Removed interface (%hhu) to add it again\n", |
| 438 | connection->intf_cport_id, intf_id); |
Viresh Kumar | bbaca71 | 2015-09-23 16:48:08 -0700 | [diff] [blame] | 439 | svc_intf_remove(connection, intf); |
| 440 | } |
| 441 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 442 | intf = gb_interface_create(hd, intf_id); |
| 443 | if (!intf) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 444 | pr_err("%d: Failed to create interface with id %hhu\n", |
| 445 | connection->intf_cport_id, intf_id); |
Viresh Kumar | 067906f | 2015-08-06 12:44:55 +0530 | [diff] [blame] | 446 | goto free_svc_hotplug; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 447 | } |
| 448 | |
Viresh Kumar | 6bec5c7 | 2015-09-24 14:40:29 -0700 | [diff] [blame] | 449 | ret = gb_svc_read_and_clear_module_boot_status(intf); |
| 450 | if (ret) |
| 451 | goto destroy_interface; |
| 452 | |
Viresh Kumar | 3944a45 | 2015-08-12 09:19:31 +0530 | [diff] [blame] | 453 | intf->unipro_mfg_id = le32_to_cpu(hotplug->data.unipro_mfg_id); |
| 454 | intf->unipro_prod_id = le32_to_cpu(hotplug->data.unipro_prod_id); |
| 455 | intf->ara_vend_id = le32_to_cpu(hotplug->data.ara_vend_id); |
| 456 | intf->ara_prod_id = le32_to_cpu(hotplug->data.ara_prod_id); |
| 457 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 458 | /* |
| 459 | * Create a device id for the interface: |
| 460 | * - device id 0 (GB_DEVICE_ID_SVC) belongs to the SVC |
| 461 | * - device id 1 (GB_DEVICE_ID_AP) belongs to the AP |
| 462 | * |
| 463 | * XXX Do we need to allocate device ID for SVC or the AP here? And what |
| 464 | * XXX about an AP with multiple interface blocks? |
| 465 | */ |
Johan Hovold | c09db18 | 2015-09-15 09:18:08 +0200 | [diff] [blame] | 466 | device_id = ida_simple_get(&svc->device_id_map, |
Johan Hovold | 89f637f | 2015-09-01 12:25:25 +0200 | [diff] [blame] | 467 | GB_DEVICE_ID_MODULES_START, 0, GFP_KERNEL); |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 468 | if (device_id < 0) { |
| 469 | ret = device_id; |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 470 | pr_err("%d: Failed to allocate device id for interface with id %hhu (%d)\n", |
| 471 | connection->intf_cport_id, intf_id, ret); |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 472 | goto destroy_interface; |
| 473 | } |
| 474 | |
Viresh Kumar | 3f0e918 | 2015-08-31 17:21:06 +0530 | [diff] [blame] | 475 | ret = gb_svc_intf_device_id(svc, intf_id, device_id); |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 476 | if (ret) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 477 | pr_err("%d: Device id operation failed, interface %hhu device_id %hhu (%d)\n", |
| 478 | connection->intf_cport_id, intf_id, device_id, ret); |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 479 | goto ida_put; |
| 480 | } |
| 481 | |
Perry Hung | 7e27546 | 2015-07-24 19:02:32 -0400 | [diff] [blame] | 482 | /* |
| 483 | * Create a two-way route between the AP and the new interface |
| 484 | */ |
Viresh Kumar | 3f0e918 | 2015-08-31 17:21:06 +0530 | [diff] [blame] | 485 | ret = gb_svc_route_create(svc, hd->endo->ap_intf_id, GB_DEVICE_ID_AP, |
| 486 | intf_id, device_id); |
Perry Hung | 7e27546 | 2015-07-24 19:02:32 -0400 | [diff] [blame] | 487 | if (ret) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 488 | pr_err("%d: Route create operation failed, interface %hhu device_id %hhu (%d)\n", |
| 489 | connection->intf_cport_id, intf_id, device_id, ret); |
Viresh Kumar | 0a02057 | 2015-09-07 18:05:26 +0530 | [diff] [blame] | 490 | goto svc_id_free; |
Perry Hung | 7e27546 | 2015-07-24 19:02:32 -0400 | [diff] [blame] | 491 | } |
| 492 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 493 | ret = gb_interface_init(intf, device_id); |
| 494 | if (ret) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 495 | pr_err("%d: Failed to initialize interface, interface %hhu device_id %hhu (%d)\n", |
| 496 | connection->intf_cport_id, intf_id, device_id, ret); |
Viresh Kumar | 0a02057 | 2015-09-07 18:05:26 +0530 | [diff] [blame] | 497 | goto destroy_route; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 498 | } |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 499 | |
Viresh Kumar | 067906f | 2015-08-06 12:44:55 +0530 | [diff] [blame] | 500 | goto free_svc_hotplug; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 501 | |
Viresh Kumar | 0a02057 | 2015-09-07 18:05:26 +0530 | [diff] [blame] | 502 | destroy_route: |
| 503 | gb_svc_route_destroy(svc, hd->endo->ap_intf_id, intf_id); |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 504 | svc_id_free: |
| 505 | /* |
| 506 | * XXX Should we tell SVC that this id doesn't belong to interface |
| 507 | * XXX anymore. |
| 508 | */ |
| 509 | ida_put: |
Johan Hovold | c09db18 | 2015-09-15 09:18:08 +0200 | [diff] [blame] | 510 | ida_simple_remove(&svc->device_id_map, device_id); |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 511 | destroy_interface: |
Viresh Kumar | 80d1ede | 2015-09-23 16:48:10 -0700 | [diff] [blame] | 512 | gb_interface_remove(intf); |
Viresh Kumar | 067906f | 2015-08-06 12:44:55 +0530 | [diff] [blame] | 513 | free_svc_hotplug: |
| 514 | kfree(svc_hotplug); |
| 515 | } |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 516 | |
Viresh Kumar | 067906f | 2015-08-06 12:44:55 +0530 | [diff] [blame] | 517 | /* |
| 518 | * Bringing up a module can be time consuming, as that may require lots of |
| 519 | * initialization on the module side. Over that, we may also need to download |
| 520 | * the firmware first and flash that on the module. |
| 521 | * |
| 522 | * In order to make other hotplug events to not wait for all this to finish, |
| 523 | * handle most of module hotplug stuff outside of the hotplug callback, with |
| 524 | * help of a workqueue. |
| 525 | */ |
| 526 | static int gb_svc_intf_hotplug_recv(struct gb_operation *op) |
| 527 | { |
| 528 | struct gb_message *request = op->request; |
| 529 | struct svc_hotplug *svc_hotplug; |
| 530 | |
| 531 | if (request->payload_size < sizeof(svc_hotplug->data)) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 532 | pr_err("%d: short hotplug request received (%zu < %zu)\n", |
| 533 | op->connection->intf_cport_id, request->payload_size, |
| 534 | sizeof(svc_hotplug->data)); |
Viresh Kumar | 067906f | 2015-08-06 12:44:55 +0530 | [diff] [blame] | 535 | return -EINVAL; |
| 536 | } |
| 537 | |
Johan Hovold | 287bba8 | 2015-09-01 12:25:26 +0200 | [diff] [blame] | 538 | svc_hotplug = kmalloc(sizeof(*svc_hotplug), GFP_KERNEL); |
Viresh Kumar | 067906f | 2015-08-06 12:44:55 +0530 | [diff] [blame] | 539 | if (!svc_hotplug) |
| 540 | return -ENOMEM; |
| 541 | |
| 542 | svc_hotplug->connection = op->connection; |
| 543 | memcpy(&svc_hotplug->data, op->request->payload, sizeof(svc_hotplug->data)); |
| 544 | |
| 545 | INIT_WORK(&svc_hotplug->work, svc_process_hotplug); |
| 546 | queue_work(system_unbound_wq, &svc_hotplug->work); |
| 547 | |
| 548 | return 0; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 549 | } |
| 550 | |
| 551 | static int gb_svc_intf_hot_unplug_recv(struct gb_operation *op) |
| 552 | { |
| 553 | struct gb_message *request = op->request; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 554 | struct gb_svc_intf_hot_unplug_request *hot_unplug = request->payload; |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 555 | struct gb_host_device *hd = op->connection->hd; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 556 | struct gb_interface *intf; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 557 | u8 intf_id; |
| 558 | |
| 559 | if (request->payload_size < sizeof(*hot_unplug)) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 560 | pr_err("connection %d: short hot unplug request received (%zu < %zu)\n", |
| 561 | op->connection->intf_cport_id, request->payload_size, |
| 562 | sizeof(*hot_unplug)); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 563 | return -EINVAL; |
| 564 | } |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 565 | |
| 566 | intf_id = hot_unplug->intf_id; |
| 567 | |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 568 | intf = gb_interface_find(hd, intf_id); |
| 569 | if (!intf) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 570 | pr_err("connection %d: Couldn't find interface for id %hhu\n", |
| 571 | op->connection->intf_cport_id, intf_id); |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 572 | return -EINVAL; |
| 573 | } |
| 574 | |
Viresh Kumar | bbaca71 | 2015-09-23 16:48:08 -0700 | [diff] [blame] | 575 | svc_intf_remove(op->connection, intf); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 576 | |
| 577 | return 0; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 578 | } |
| 579 | |
| 580 | static int gb_svc_intf_reset_recv(struct gb_operation *op) |
| 581 | { |
| 582 | struct gb_message *request = op->request; |
| 583 | struct gb_svc_intf_reset_request *reset; |
| 584 | u8 intf_id; |
| 585 | |
| 586 | if (request->payload_size < sizeof(*reset)) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 587 | pr_err("connection %d: short reset request received (%zu < %zu)\n", |
| 588 | op->connection->intf_cport_id, request->payload_size, |
| 589 | sizeof(*reset)); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 590 | return -EINVAL; |
| 591 | } |
| 592 | reset = request->payload; |
| 593 | |
| 594 | intf_id = reset->intf_id; |
| 595 | |
| 596 | /* FIXME Reset the interface here */ |
| 597 | |
| 598 | return 0; |
| 599 | } |
| 600 | |
| 601 | static int gb_svc_request_recv(u8 type, struct gb_operation *op) |
| 602 | { |
Viresh Kumar | 3ccb160 | 2015-09-03 15:42:22 +0530 | [diff] [blame] | 603 | struct gb_connection *connection = op->connection; |
| 604 | struct gb_svc *svc = connection->private; |
| 605 | int ret = 0; |
| 606 | |
| 607 | /* |
| 608 | * SVC requests need to follow a specific order (at least initially) and |
| 609 | * below code takes care of enforcing that. The expected order is: |
| 610 | * - PROTOCOL_VERSION |
| 611 | * - SVC_HELLO |
| 612 | * - Any other request, but the earlier two. |
| 613 | * |
| 614 | * Incoming requests are guaranteed to be serialized and so we don't |
| 615 | * need to protect 'state' for any races. |
| 616 | */ |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 617 | switch (type) { |
Viresh Kumar | 0e2462d | 2015-08-14 07:57:38 +0530 | [diff] [blame] | 618 | case GB_REQUEST_TYPE_PROTOCOL_VERSION: |
Viresh Kumar | 3ccb160 | 2015-09-03 15:42:22 +0530 | [diff] [blame] | 619 | if (svc->state != GB_SVC_STATE_RESET) |
| 620 | ret = -EINVAL; |
| 621 | break; |
Viresh Kumar | ead3546 | 2015-07-21 17:44:19 +0530 | [diff] [blame] | 622 | case GB_SVC_TYPE_SVC_HELLO: |
Viresh Kumar | 3ccb160 | 2015-09-03 15:42:22 +0530 | [diff] [blame] | 623 | if (svc->state != GB_SVC_STATE_PROTOCOL_VERSION) |
| 624 | ret = -EINVAL; |
| 625 | break; |
| 626 | default: |
| 627 | if (svc->state != GB_SVC_STATE_SVC_HELLO) |
| 628 | ret = -EINVAL; |
| 629 | break; |
| 630 | } |
| 631 | |
| 632 | if (ret) { |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 633 | pr_warn("connection %d: unexpected SVC request 0x%02x received (state %u)\n", |
| 634 | connection->intf_cport_id, type, svc->state); |
Viresh Kumar | 3ccb160 | 2015-09-03 15:42:22 +0530 | [diff] [blame] | 635 | return ret; |
| 636 | } |
| 637 | |
| 638 | switch (type) { |
| 639 | case GB_REQUEST_TYPE_PROTOCOL_VERSION: |
| 640 | ret = gb_svc_version_request(op); |
| 641 | if (!ret) |
| 642 | svc->state = GB_SVC_STATE_PROTOCOL_VERSION; |
| 643 | return ret; |
| 644 | case GB_SVC_TYPE_SVC_HELLO: |
| 645 | ret = gb_svc_hello(op); |
| 646 | if (!ret) |
| 647 | svc->state = GB_SVC_STATE_SVC_HELLO; |
| 648 | return ret; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 649 | case GB_SVC_TYPE_INTF_HOTPLUG: |
| 650 | return gb_svc_intf_hotplug_recv(op); |
| 651 | case GB_SVC_TYPE_INTF_HOT_UNPLUG: |
| 652 | return gb_svc_intf_hot_unplug_recv(op); |
| 653 | case GB_SVC_TYPE_INTF_RESET: |
| 654 | return gb_svc_intf_reset_recv(op); |
| 655 | default: |
Greg Kroah-Hartman | b50a24e | 2015-10-16 16:53:31 -0700 | [diff] [blame] | 656 | pr_err("connection %d: unsupported request: %hhu\n", |
| 657 | connection->intf_cport_id, type); |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 658 | return -EINVAL; |
| 659 | } |
| 660 | } |
| 661 | |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 662 | static int gb_svc_connection_init(struct gb_connection *connection) |
| 663 | { |
| 664 | struct gb_svc *svc; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 665 | |
| 666 | svc = kzalloc(sizeof(*svc), GFP_KERNEL); |
| 667 | if (!svc) |
| 668 | return -ENOMEM; |
| 669 | |
Perry Hung | 75a60ed | 2015-07-24 19:02:33 -0400 | [diff] [blame] | 670 | connection->hd->svc = svc; |
Viresh Kumar | 3ccb160 | 2015-09-03 15:42:22 +0530 | [diff] [blame] | 671 | svc->state = GB_SVC_STATE_RESET; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 672 | svc->connection = connection; |
| 673 | connection->private = svc; |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 674 | |
Viresh Kumar | dcd0500 | 2015-07-24 15:32:20 +0530 | [diff] [blame] | 675 | WARN_ON(connection->hd->initial_svc_connection); |
| 676 | connection->hd->initial_svc_connection = connection; |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 677 | |
Johan Hovold | c09db18 | 2015-09-15 09:18:08 +0200 | [diff] [blame] | 678 | ida_init(&svc->device_id_map); |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 679 | |
Viresh Kumar | 18d777c | 2015-07-21 17:44:20 +0530 | [diff] [blame] | 680 | return 0; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 681 | } |
| 682 | |
| 683 | static void gb_svc_connection_exit(struct gb_connection *connection) |
| 684 | { |
| 685 | struct gb_svc *svc = connection->private; |
| 686 | |
Johan Hovold | c09db18 | 2015-09-15 09:18:08 +0200 | [diff] [blame] | 687 | ida_destroy(&svc->device_id_map); |
Perry Hung | 75a60ed | 2015-07-24 19:02:33 -0400 | [diff] [blame] | 688 | connection->hd->svc = NULL; |
Viresh Kumar | d3d4484 | 2015-07-21 17:44:18 +0530 | [diff] [blame] | 689 | connection->private = NULL; |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 690 | kfree(svc); |
| 691 | } |
| 692 | |
| 693 | static struct gb_protocol svc_protocol = { |
| 694 | .name = "svc", |
| 695 | .id = GREYBUS_PROTOCOL_SVC, |
Viresh Kumar | 06e305f | 2015-07-01 12:13:51 +0530 | [diff] [blame] | 696 | .major = GB_SVC_VERSION_MAJOR, |
| 697 | .minor = GB_SVC_VERSION_MINOR, |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 698 | .connection_init = gb_svc_connection_init, |
| 699 | .connection_exit = gb_svc_connection_exit, |
| 700 | .request_recv = gb_svc_request_recv, |
Viresh Kumar | 5a5296b | 2015-09-07 16:01:24 +0530 | [diff] [blame] | 701 | .flags = GB_PROTOCOL_SKIP_CONTROL_CONNECTED | |
| 702 | GB_PROTOCOL_SKIP_CONTROL_DISCONNECTED | |
| 703 | GB_PROTOCOL_NO_BUNDLE | |
| 704 | GB_PROTOCOL_SKIP_VERSION | |
| 705 | GB_PROTOCOL_SKIP_SVC_CONNECTION, |
Alex Elder | 30c6d9d | 2015-05-22 13:02:08 -0500 | [diff] [blame] | 706 | }; |
Viresh Kumar | ab69c4c | 2015-07-03 17:00:29 +0530 | [diff] [blame] | 707 | gb_builtin_protocol_driver(svc_protocol); |