// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2018-2019, Intel Corporation * Copyright (C) 2025, Altera Corporation */ #include #include #include #include #include #include #include #include #include #include #include #include #include #define RSU_STATE_MASK GENMASK_ULL(31, 0) #define RSU_VERSION_MASK GENMASK_ULL(63, 32) #define RSU_ERROR_LOCATION_MASK GENMASK_ULL(31, 0) #define RSU_ERROR_DETAIL_MASK GENMASK_ULL(63, 32) /* * INTEL_SIP_SMC_RSU_GET_DEVICE_INFO packs each flash word as: * [63:32] erase_size, [31:0] size (see stratix10-smc.h). */ #define RSU_DEVICE_INFO_SIZE_MASK GENMASK_ULL(31, 0) #define RSU_DEVICE_INFO_ERASE_SIZE_MASK GENMASK_ULL(63, 32) #define RSU_DCMF0_MASK GENMASK_ULL(31, 0) #define RSU_DCMF1_MASK GENMASK_ULL(63, 32) #define RSU_DCMF2_MASK GENMASK_ULL(31, 0) #define RSU_DCMF3_MASK GENMASK_ULL(63, 32) #define RSU_DCMF0_STATUS_MASK GENMASK_ULL(15, 0) #define RSU_DCMF1_STATUS_MASK GENMASK_ULL(31, 16) #define RSU_DCMF2_STATUS_MASK GENMASK_ULL(47, 32) #define RSU_DCMF3_STATUS_MASK GENMASK_ULL(63, 48) #define RSU_TIMEOUT (msecs_to_jiffies(SVC_RSU_REQUEST_TIMEOUT_MS)) #define INVALID_RETRY_COUNTER 0xFF #define INVALID_DCMF_VERSION 0xFF #define INVALID_DCMF_STATUS 0xFFFFFFFF #define INVALID_SPT_ADDRESS 0x0 #define INVALID_DEVICE_INFO (~0U) #define RSU_RETRY_SLEEP_MS (1U) #define RSU_ASYNC_MSG_RETRY (3U) #define RSU_GET_SPT_CMD 0x5A #define RSU_GET_SPT_RESP_LEN (4 * sizeof(unsigned int)) struct flash_device_info { unsigned int size; unsigned int erase_size; }; /** * rsu_device_info_set_from_packed() - Decode one RSU device-info SMC word * @di: slot to fill * @packed: register value: [63:32] erase_size, [31:0] size * (INTEL_SIP_SMC_RSU_GET_DEVICE_INFO) */ static void rsu_device_info_set_from_packed(struct flash_device_info *di, unsigned long packed) { di->size = (unsigned int)FIELD_GET(RSU_DEVICE_INFO_SIZE_MASK, packed); di->erase_size = (unsigned int)FIELD_GET(RSU_DEVICE_INFO_ERASE_SIZE_MASK, packed); } typedef void (*rsu_callback)(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data); /** * struct stratix10_rsu_priv - rsu data structure * @chan: pointer to the allocated service channel * @client: active service client * @completion: state for callback completion * @lock: a mutex to protect callback completion state * @async: supports async operations * @status.current_image: address of image currently running in flash * @status.fail_image: address of failed image in flash * @status.version: the interface version number of RSU firmware * @status.state: the state of RSU system * @status.error_details: error code * @status.error_location: the error offset inside the image that failed * @dcmf_version.dcmf0: Quartus dcmf0 version * @dcmf_version.dcmf1: Quartus dcmf1 version * @dcmf_version.dcmf2: Quartus dcmf2 version * @dcmf_version.dcmf3: Quartus dcmf3 version * @dcmf_status.dcmf0: dcmf0 status * @dcmf_status.dcmf1: dcmf1 status * @dcmf_status.dcmf2: dcmf2 status * @dcmf_status.dcmf3: dcmf3 status * @device_info: per-device flash information array; each entry contains * size and erase size for one flash device * @retry_counter: the current image's retry counter * @max_retry: the preset max retry value * @spt0_address: address of spt0 * @spt1_address: address of spt1 * @get_spt_response_buf: response from sdm for get_spt command */ struct stratix10_rsu_priv { struct stratix10_svc_chan *chan; struct stratix10_svc_client client; struct completion completion; struct mutex lock; bool async; struct { unsigned long current_image; unsigned long fail_image; unsigned int version; unsigned int state; unsigned int error_details; unsigned int error_location; } status; struct { unsigned int dcmf0; unsigned int dcmf1; unsigned int dcmf2; unsigned int dcmf3; } dcmf_version; struct { unsigned int dcmf0; unsigned int dcmf1; unsigned int dcmf2; unsigned int dcmf3; } dcmf_status; struct flash_device_info device_info[4]; unsigned int retry_counter; unsigned int max_retry; unsigned long spt0_address; unsigned long spt1_address; unsigned int *get_spt_response_buf; }; /** * rsu_device_info_invalidate() - Mark all cached QSPI device slots invalid * @priv: RSU private data */ static void rsu_device_info_invalidate(struct stratix10_rsu_priv *priv) { unsigned int i; for (i = 0; i < ARRAY_SIZE(priv->device_info); i++) { priv->device_info[i].size = INVALID_DEVICE_INFO; priv->device_info[i].erase_size = INVALID_DEVICE_INFO; } } typedef void (*rsu_async_callback)(struct device *dev, struct stratix10_rsu_priv *priv, struct stratix10_svc_cb_data *data); /** * rsu_status_callback() - Status callback from Intel Service Layer * @client: pointer to service client * @data: pointer to callback data structure * * Callback from Intel service layer for RSU status request. Status is * only updated after a system reboot, so a get updated status call is * made during driver probe. */ static void rsu_status_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; struct arm_smccc_res *res = (struct arm_smccc_res *)data->kaddr1; if (data->status == BIT(SVC_STATUS_OK)) { priv->status.version = FIELD_GET(RSU_VERSION_MASK, res->a2); priv->status.state = FIELD_GET(RSU_STATE_MASK, res->a2); priv->status.fail_image = res->a1; priv->status.current_image = res->a0; priv->status.error_location = FIELD_GET(RSU_ERROR_LOCATION_MASK, res->a3); priv->status.error_details = FIELD_GET(RSU_ERROR_DETAIL_MASK, res->a3); } else { dev_err(client->dev, "COMMAND_RSU_STATUS returned 0x%lX\n", res->a0); priv->status.version = 0; priv->status.state = 0; priv->status.fail_image = 0; priv->status.current_image = 0; priv->status.error_location = 0; priv->status.error_details = 0; } complete(&priv->completion); } /** * rsu_async_status_callback() - Status callback from rsu_async_send() * @dev: pointer to device object * @priv: pointer to priv object * @data: pointer to callback data structure * * Callback from rsu_async_send() to get the system rsu error status. */ static void rsu_async_status_callback(struct device *dev, struct stratix10_rsu_priv *priv, struct stratix10_svc_cb_data *data) { struct arm_smccc_1_2_regs *res = (struct arm_smccc_1_2_regs *)data->kaddr1; priv->status.current_image = res->a2; priv->status.fail_image = res->a3; priv->status.state = res->a4; priv->status.version = res->a5; priv->status.error_location = res->a7; priv->status.error_details = res->a8; priv->retry_counter = res->a9; } /** * rsu_command_callback() - Update callback from Intel Service Layer * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for RSU commands. */ static void rsu_command_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; if (data->status == BIT(SVC_STATUS_NO_SUPPORT)) dev_warn(client->dev, "Secure FW doesn't support notify\n"); else if (data->status == BIT(SVC_STATUS_ERROR)) dev_err(client->dev, "Failure, returned status is %lu\n", BIT(data->status)); complete(&priv->completion); } /** * rsu_retry_callback() - Callback from Intel service layer for getting * the current image's retry counter from the firmware * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for retry counter, which is used by * user to know how many times the images is still allowed to reload * itself before giving up and starting RSU fail-over flow. */ static void rsu_retry_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; unsigned int *counter = (unsigned int *)data->kaddr1; if (data->status == BIT(SVC_STATUS_OK)) priv->retry_counter = *counter; else if (data->status == BIT(SVC_STATUS_NO_SUPPORT)) dev_warn(client->dev, "Secure FW doesn't support retry\n"); else dev_err(client->dev, "Failed to get retry counter %lu\n", BIT(data->status)); complete(&priv->completion); } /** * rsu_max_retry_callback() - Callback from Intel service layer for getting * the max retry value from the firmware * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for max retry. */ static void rsu_max_retry_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; unsigned int *max_retry = (unsigned int *)data->kaddr1; if (data->status == BIT(SVC_STATUS_OK)) priv->max_retry = *max_retry; else if (data->status == BIT(SVC_STATUS_NO_SUPPORT)) dev_warn(client->dev, "Secure FW doesn't support max retry\n"); else dev_err(client->dev, "Failed to get max retry %lu\n", BIT(data->status)); complete(&priv->completion); } /** * rsu_dcmf_version_callback() - Callback from Intel service layer for getting * the DCMF version * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for DCMF version number */ static void rsu_dcmf_version_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; unsigned long long *value1 = (unsigned long long *)data->kaddr1; unsigned long long *value2 = (unsigned long long *)data->kaddr2; if (data->status == BIT(SVC_STATUS_OK)) { priv->dcmf_version.dcmf0 = FIELD_GET(RSU_DCMF0_MASK, *value1); priv->dcmf_version.dcmf1 = FIELD_GET(RSU_DCMF1_MASK, *value1); priv->dcmf_version.dcmf2 = FIELD_GET(RSU_DCMF2_MASK, *value2); priv->dcmf_version.dcmf3 = FIELD_GET(RSU_DCMF3_MASK, *value2); } else dev_err(client->dev, "failed to get DCMF version\n"); complete(&priv->completion); } /** * rsu_dcmf_status_callback() - Callback from Intel service layer for getting * the DCMF status * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for DCMF status */ static void rsu_dcmf_status_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; unsigned long long *value = (unsigned long long *)data->kaddr1; if (data->status == BIT(SVC_STATUS_OK)) { priv->dcmf_status.dcmf0 = FIELD_GET(RSU_DCMF0_STATUS_MASK, *value); priv->dcmf_status.dcmf1 = FIELD_GET(RSU_DCMF1_STATUS_MASK, *value); priv->dcmf_status.dcmf2 = FIELD_GET(RSU_DCMF2_STATUS_MASK, *value); priv->dcmf_status.dcmf3 = FIELD_GET(RSU_DCMF3_STATUS_MASK, *value); } else dev_err(client->dev, "failed to get DCMF status\n"); complete(&priv->completion); } /** * rsu_get_device_info_callback() - Callback from Intel service layer for * getting the QSPI device info * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for QSPI device info. * @data->kaddr1 points to struct arm_smccc_1_2_regs on SVC_STATUS_OK or * SVC_STATUS_ERROR; it is NULL on SVC_STATUS_NO_SUPPORT (unsupported command). */ static void rsu_get_device_info_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; struct arm_smccc_1_2_regs *res = data->kaddr1; if (data->status == BIT(SVC_STATUS_OK)) { if (!res) { dev_err(client->dev, "COMMAND_RSU_GET_DEVICE_INFO: missing result payload\n"); rsu_device_info_invalidate(priv); complete(&priv->completion); return; } rsu_device_info_set_from_packed(&priv->device_info[0], res->a1); rsu_device_info_set_from_packed(&priv->device_info[1], res->a2); rsu_device_info_set_from_packed(&priv->device_info[2], res->a3); rsu_device_info_set_from_packed(&priv->device_info[3], res->a4); } else if (data->status == BIT(SVC_STATUS_NO_SUPPORT)) { dev_warn(client->dev, "COMMAND_RSU_GET_DEVICE_INFO not supported by firmware\n"); rsu_device_info_invalidate(priv); } else { if (res) dev_err(client->dev, "COMMAND_RSU_GET_DEVICE_INFO returned 0x%lX\n", res->a0); else dev_err(client->dev, "COMMAND_RSU_GET_DEVICE_INFO failed with status 0x%X\n", data->status); rsu_device_info_invalidate(priv); } complete(&priv->completion); } /** * rsu_async_get_spt_table_callback() - Callback to be used by the * rsu_async_send() to retrieve the SPT table information. * @dev: pointer to device object * @priv: pointer to priv object * @data: pointer to callback data structure */ static void rsu_async_get_spt_table_callback(struct device *dev, struct stratix10_rsu_priv *priv, struct stratix10_svc_cb_data *data) { priv->spt0_address = *((unsigned long *)data->kaddr1); priv->spt1_address = *((unsigned long *)data->kaddr2); } static void rsu_get_spt_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; unsigned long *mbox_err = (unsigned long *)data->kaddr1; unsigned long *resp_len = (unsigned long *)data->kaddr2; if (data->status != BIT(SVC_STATUS_OK) || (*mbox_err) || (*resp_len != RSU_GET_SPT_RESP_LEN)) goto error; priv->spt0_address = priv->get_spt_response_buf[0]; priv->spt0_address <<= 32; priv->spt0_address |= priv->get_spt_response_buf[1]; priv->spt1_address = priv->get_spt_response_buf[2]; priv->spt1_address <<= 32; priv->spt1_address |= priv->get_spt_response_buf[3]; goto complete; error: dev_err(priv->client.dev, "failed to get SPTs (status=%#x, mbox_err=%lu, resp_len=%lu)\n", data->status, mbox_err ? *mbox_err : 0, resp_len ? *resp_len : 0); complete: stratix10_svc_free_memory(priv->chan, priv->get_spt_response_buf); priv->get_spt_response_buf = NULL; complete(&priv->completion); } /** * __rsu_send_msg_locked() - send a message to Intel service layer * @priv: pointer to rsu private data * @command: RSU status or update command * @arg: the request argument, the bitstream address or notify status * @callback: function pointer for the callback (status or update) * * Perform the actual SMC transaction. The caller must hold @priv->lock. * * Returns 0 on success or a negative errno on failure. */ static int __rsu_send_msg_locked(struct stratix10_rsu_priv *priv, enum stratix10_svc_command_code command, unsigned long arg, rsu_callback callback) { struct stratix10_svc_client_msg msg = {0}; int ret; lockdep_assert_held(&priv->lock); reinit_completion(&priv->completion); priv->client.receive_cb = callback; msg.command = command; if (arg) msg.arg[0] = arg; if (command == COMMAND_MBOX_SEND_CMD) { msg.arg[1] = 0; msg.payload = NULL; msg.payload_length = 0; msg.payload_output = priv->get_spt_response_buf; msg.payload_length_output = RSU_GET_SPT_RESP_LEN; } ret = stratix10_svc_send(priv->chan, &msg); if (ret < 0) goto status_done; ret = wait_for_completion_interruptible_timeout(&priv->completion, RSU_TIMEOUT); if (!ret) { dev_err(priv->client.dev, "timeout waiting for SMC call\n"); ret = -ETIMEDOUT; goto status_done; } else if (ret < 0) { dev_err(priv->client.dev, "error %d waiting for SMC call\n", ret); goto status_done; } else { ret = 0; } status_done: stratix10_svc_done(priv->chan); return ret; } /** * rsu_send_msg() - send a message to Intel service layer * @priv: pointer to rsu private data * @command: RSU status or update command * @arg: the request argument, the bitstream address or notify status * @callback: function pointer for the callback (status or update) * * Start an Intel service layer transaction to perform the SMC call that * is necessary to get RSU boot log or set the address of bitstream to * boot after reboot. This call will block until the RSU lock can be * acquired. * * Returns 0 on success or a negative errno on failure. */ static int rsu_send_msg(struct stratix10_rsu_priv *priv, enum stratix10_svc_command_code command, unsigned long arg, rsu_callback callback) { int ret; mutex_lock(&priv->lock); ret = __rsu_send_msg_locked(priv, command, arg, callback); mutex_unlock(&priv->lock); return ret; } /** * rsu_try_send_msg() - non-blocking variant of rsu_send_msg() * @priv: pointer to rsu private data * @command: RSU status or update command * @arg: the request argument, the bitstream address or notify status * @callback: function pointer for the callback (status or update) * * Same as rsu_send_msg() but returns -EBUSY immediately when another * RSU operation is already in flight, instead of waiting for the lock. * * Returns 0 on success, -EBUSY if the RSU is busy, or another negative * errno on failure. */ static int rsu_try_send_msg(struct stratix10_rsu_priv *priv, enum stratix10_svc_command_code command, unsigned long arg, rsu_callback callback) { int ret; if (!mutex_trylock(&priv->lock)) return -EBUSY; ret = __rsu_send_msg_locked(priv, command, arg, callback); mutex_unlock(&priv->lock); return ret; } /** * soc64_async_callback() - Callback from Intel service layer for async requests * @ptr: pointer to the completion object */ static void soc64_async_callback(void *ptr) { if (ptr) complete(ptr); } /** * rsu_send_async_msg() - send an async message to Intel service layer * @dev: pointer to device object * @priv: pointer to rsu private data * @command: RSU status or update command * @arg: the request argument, notify status * @callback: function pointer for the callback (status or update) */ static int rsu_send_async_msg(struct device *dev, struct stratix10_rsu_priv *priv, enum stratix10_svc_command_code command, unsigned long arg, rsu_async_callback callback) { struct stratix10_svc_client_msg msg = {0}; struct stratix10_svc_cb_data data = {0}; struct completion completion; int status, index, ret; void *handle = NULL; msg.command = command; msg.arg[0] = arg; init_completion(&completion); for (index = 0; index < RSU_ASYNC_MSG_RETRY; index++) { status = stratix10_svc_async_send(priv->chan, &msg, &handle, soc64_async_callback, &completion); if (status == 0) break; dev_warn(dev, "Failed to send async message\n"); msleep(RSU_RETRY_SLEEP_MS); } if (status && !handle) { dev_err(dev, "Failed to send async message\n"); if (msg.payload_output) stratix10_svc_free_memory(priv->chan, msg.payload_output); return -ETIMEDOUT; } ret = wait_for_completion_io_timeout(&completion, RSU_TIMEOUT); if (ret > 0) dev_dbg(dev, "Received async interrupt\n"); else if (ret == 0) dev_dbg(dev, "Timeout occurred. Trying to poll the response\n"); for (index = 0; index < RSU_ASYNC_MSG_RETRY; index++) { status = stratix10_svc_async_poll(priv->chan, handle, &data); if (status == -EAGAIN) { dev_dbg(dev, "Async message is still in progress\n"); } else if (status < 0) { dev_alert(dev, "Failed to poll async message\n"); ret = -ETIMEDOUT; } else if (status == 0) { ret = 0; break; } msleep(RSU_RETRY_SLEEP_MS); } if (ret) { dev_err(dev, "Failed to get async response\n"); goto status_done; } if (data.status == 0) { ret = 0; if (callback) callback(dev, priv, &data); } else { dev_err(dev, "%s returned 0x%x from SDM\n", __func__, data.status); ret = -EFAULT; } status_done: if (msg.payload_output) stratix10_svc_free_memory(priv->chan, msg.payload_output); stratix10_svc_async_done(priv->chan, handle); return ret; } /* * This driver exposes some optional features of the Intel Stratix 10 SoC FPGA. * The sysfs interfaces exposed here are FPGA Remote System Update (RSU) * related. They allow user space software to query the configuration system * status and to request optional reboot behavior specific to Intel FPGAs. */ static ssize_t current_image_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08lx\n", priv->status.current_image); } static ssize_t fail_image_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08lx\n", priv->status.fail_image); } static ssize_t version_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->status.version); } static ssize_t state_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->status.state); } static ssize_t error_location_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->status.error_location); } static ssize_t error_details_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->status.error_details); } static ssize_t retry_counter_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->retry_counter); } static ssize_t max_retry_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sysfs_emit(buf, "0x%08x\n", priv->max_retry); } static ssize_t dcmf0_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf0); } static ssize_t dcmf1_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf1); } static ssize_t dcmf2_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf2); } static ssize_t dcmf3_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf3); } static ssize_t dcmf0_status_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; if (priv->dcmf_status.dcmf0 == INVALID_DCMF_STATUS) return -EIO; return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf0); } static ssize_t dcmf1_status_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; if (priv->dcmf_status.dcmf1 == INVALID_DCMF_STATUS) return -EIO; return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf1); } static ssize_t dcmf2_status_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; if (priv->dcmf_status.dcmf2 == INVALID_DCMF_STATUS) return -EIO; return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf2); } static ssize_t dcmf3_status_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; if (priv->dcmf_status.dcmf3 == INVALID_DCMF_STATUS) return -EIO; return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf3); } static ssize_t reboot_image_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); unsigned long address; int ret; if (!priv) return -ENODEV; ret = kstrtoul(buf, 0, &address); if (ret) return ret; /* * Use the non-blocking variant so a write to this sysfs attribute * does not stall the caller while another RSU operation is in * flight. Userspace can retry on -EBUSY. */ ret = rsu_try_send_msg(priv, COMMAND_RSU_UPDATE, address, rsu_command_callback); if (ret == -EBUSY) { dev_dbg(dev, "RSU busy, reboot_image write rejected\n"); return ret; } if (ret) { dev_err(dev, "Error, RSU update returned %i\n", ret); return ret; } return count; } static ssize_t notify_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); unsigned long status; int ret; if (!priv) return -ENODEV; ret = kstrtoul(buf, 0, &status); if (ret) return ret; if (priv->async) ret = rsu_send_async_msg(dev, priv, COMMAND_RSU_NOTIFY, status, NULL); else ret = rsu_send_msg(priv, COMMAND_RSU_NOTIFY, status, rsu_command_callback); if (ret) { dev_err(dev, "Error, RSU notify returned %i\n", ret); return ret; } /* to get the updated state */ if (priv->async) { ret = rsu_send_async_msg(dev, priv, COMMAND_RSU_STATUS, 0, rsu_async_status_callback); } else { ret = rsu_send_msg(priv, COMMAND_RSU_STATUS, 0, rsu_status_callback); /* * In async mode COMMAND_RSU_RETRY is part of COMMAND_RSU_STATUS; * issue it separately only in synchronous mode. */ if (!ret) ret = rsu_send_msg(priv, COMMAND_RSU_RETRY, 0, rsu_retry_callback); } if (ret) { dev_err(dev, "Error, getting RSU status %i\n", ret); return ret; } return count; } static ssize_t rsu_device_info_show(struct device *dev, char *buf, unsigned int index, bool erase_size) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); unsigned int value; if (!priv) return -ENODEV; if (index >= ARRAY_SIZE(priv->device_info)) return -EINVAL; value = erase_size ? priv->device_info[index].erase_size : priv->device_info[index].size; if (value == INVALID_DEVICE_INFO) return -EIO; return sysfs_emit(buf, "0x%08x\n", value); } static ssize_t size0_show(struct device *dev, struct device_attribute *attr, char *buf) { return rsu_device_info_show(dev, buf, 0, false); } static ssize_t size1_show(struct device *dev, struct device_attribute *attr, char *buf) { return rsu_device_info_show(dev, buf, 1, false); } static ssize_t size2_show(struct device *dev, struct device_attribute *attr, char *buf) { return rsu_device_info_show(dev, buf, 2, false); } static ssize_t size3_show(struct device *dev, struct device_attribute *attr, char *buf) { return rsu_device_info_show(dev, buf, 3, false); } static ssize_t erase_size0_show(struct device *dev, struct device_attribute *attr, char *buf) { return rsu_device_info_show(dev, buf, 0, true); } static ssize_t erase_size1_show(struct device *dev, struct device_attribute *attr, char *buf) { return rsu_device_info_show(dev, buf, 1, true); } static ssize_t erase_size2_show(struct device *dev, struct device_attribute *attr, char *buf) { return rsu_device_info_show(dev, buf, 2, true); } static ssize_t erase_size3_show(struct device *dev, struct device_attribute *attr, char *buf) { return rsu_device_info_show(dev, buf, 3, true); } static ssize_t spt0_address_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; if (priv->spt0_address == INVALID_SPT_ADDRESS) return -EIO; return sysfs_emit(buf, "0x%08lx\n", priv->spt0_address); } static ssize_t spt1_address_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; if (priv->spt1_address == INVALID_SPT_ADDRESS) return -EIO; return sysfs_emit(buf, "0x%08lx\n", priv->spt1_address); } static DEVICE_ATTR_RO(current_image); static DEVICE_ATTR_RO(fail_image); static DEVICE_ATTR_RO(state); static DEVICE_ATTR_RO(version); static DEVICE_ATTR_RO(error_location); static DEVICE_ATTR_RO(error_details); static DEVICE_ATTR_RO(retry_counter); static DEVICE_ATTR_RO(max_retry); static DEVICE_ATTR_RO(dcmf0); static DEVICE_ATTR_RO(dcmf1); static DEVICE_ATTR_RO(dcmf2); static DEVICE_ATTR_RO(dcmf3); static DEVICE_ATTR_RO(dcmf0_status); static DEVICE_ATTR_RO(dcmf1_status); static DEVICE_ATTR_RO(dcmf2_status); static DEVICE_ATTR_RO(dcmf3_status); static DEVICE_ATTR_RO(size0); static DEVICE_ATTR_RO(size1); static DEVICE_ATTR_RO(size2); static DEVICE_ATTR_RO(size3); static DEVICE_ATTR_RO(erase_size0); static DEVICE_ATTR_RO(erase_size1); static DEVICE_ATTR_RO(erase_size2); static DEVICE_ATTR_RO(erase_size3); static DEVICE_ATTR_WO(reboot_image); static DEVICE_ATTR_WO(notify); static DEVICE_ATTR_RO(spt0_address); static DEVICE_ATTR_RO(spt1_address); static struct attribute *rsu_attrs[] = { &dev_attr_current_image.attr, &dev_attr_fail_image.attr, &dev_attr_state.attr, &dev_attr_version.attr, &dev_attr_error_location.attr, &dev_attr_error_details.attr, &dev_attr_retry_counter.attr, &dev_attr_max_retry.attr, &dev_attr_dcmf0.attr, &dev_attr_dcmf1.attr, &dev_attr_dcmf2.attr, &dev_attr_dcmf3.attr, &dev_attr_dcmf0_status.attr, &dev_attr_dcmf1_status.attr, &dev_attr_dcmf2_status.attr, &dev_attr_dcmf3_status.attr, &dev_attr_size0.attr, &dev_attr_size1.attr, &dev_attr_size2.attr, &dev_attr_size3.attr, &dev_attr_erase_size0.attr, &dev_attr_erase_size1.attr, &dev_attr_erase_size2.attr, &dev_attr_erase_size3.attr, &dev_attr_reboot_image.attr, &dev_attr_notify.attr, &dev_attr_spt0_address.attr, &dev_attr_spt1_address.attr, NULL }; ATTRIBUTE_GROUPS(rsu); static int stratix10_rsu_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct stratix10_rsu_priv *priv; int ret; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->client.dev = dev; priv->client.priv = priv; priv->retry_counter = INVALID_RETRY_COUNTER; priv->max_retry = INVALID_RETRY_COUNTER; priv->dcmf_version.dcmf0 = INVALID_DCMF_VERSION; priv->dcmf_version.dcmf1 = INVALID_DCMF_VERSION; priv->dcmf_version.dcmf2 = INVALID_DCMF_VERSION; priv->dcmf_version.dcmf3 = INVALID_DCMF_VERSION; priv->dcmf_status.dcmf0 = INVALID_DCMF_STATUS; priv->dcmf_status.dcmf1 = INVALID_DCMF_STATUS; priv->dcmf_status.dcmf2 = INVALID_DCMF_STATUS; priv->dcmf_status.dcmf3 = INVALID_DCMF_STATUS; priv->max_retry = INVALID_RETRY_COUNTER; priv->spt0_address = INVALID_SPT_ADDRESS; priv->spt1_address = INVALID_SPT_ADDRESS; priv->get_spt_response_buf = NULL; priv->async = false; rsu_device_info_invalidate(priv); mutex_init(&priv->lock); init_completion(&priv->completion); priv->chan = stratix10_svc_request_channel_byname(&priv->client, SVC_CLIENT_RSU); if (IS_ERR(priv->chan)) { dev_err(dev, "couldn't get service channel %s\n", SVC_CLIENT_RSU); return PTR_ERR(priv->chan); } ret = stratix10_svc_add_async_client(priv->chan, false); if (ret < 0) { dev_dbg(dev, "Async operations not supported, fallback to non-async mode\n"); priv->async = false; } else { priv->async = true; } platform_set_drvdata(pdev, priv); /* get the initial state from firmware */ if (priv->async) ret = rsu_send_async_msg(dev, priv, COMMAND_RSU_STATUS, 0, rsu_async_status_callback); else ret = rsu_send_msg(priv, COMMAND_RSU_STATUS, 0, rsu_status_callback); if (ret) { dev_err(dev, "Error, getting RSU status %i\n", ret); if (priv->async) goto remove_async_client; goto free_channel; } /* * In async mode COMMAND_RSU_RETRY is part of COMMAND_RSU_STATUS; * issue it separately only in synchronous mode. */ if (!priv->async) { ret = rsu_send_msg(priv, COMMAND_RSU_RETRY, 0, rsu_retry_callback); if (ret) { dev_err(dev, "Error, getting RSU retry %i\n", ret); goto free_channel; } } /* get DCMF version from firmware */ ret = rsu_send_msg(priv, COMMAND_RSU_DCMF_VERSION, 0, rsu_dcmf_version_callback); if (ret) { dev_err(dev, "Error, getting DCMF version %i\n", ret); if (priv->async) goto remove_async_client; goto free_channel; } ret = rsu_send_msg(priv, COMMAND_RSU_DCMF_STATUS, 0, rsu_dcmf_status_callback); if (ret) { dev_err(dev, "Error, getting DCMF status %i\n", ret); if (priv->async) goto remove_async_client; goto free_channel; } ret = rsu_send_msg(priv, COMMAND_RSU_MAX_RETRY, 0, rsu_max_retry_callback); if (ret) { dev_err(dev, "Error, getting RSU max retry %i\n", ret); if (priv->async) goto remove_async_client; goto free_channel; } /* get QSPI device info from firmware */ ret = rsu_send_msg(priv, COMMAND_RSU_GET_DEVICE_INFO, 0, rsu_get_device_info_callback); if (ret) { dev_err(dev, "Error, getting QSPI Device Info %i\n", ret); if (priv->async) goto remove_async_client; goto free_channel; } if (priv->async) { ret = rsu_send_async_msg(dev, priv, COMMAND_RSU_GET_SPT_TABLE, 0, rsu_async_get_spt_table_callback); } else { priv->get_spt_response_buf = stratix10_svc_allocate_memory(priv->chan, RSU_GET_SPT_RESP_LEN); if (IS_ERR(priv->get_spt_response_buf)) { ret = PTR_ERR(priv->get_spt_response_buf); priv->get_spt_response_buf = NULL; dev_err(dev, "failed to allocate get spt buffer\n"); } else { ret = rsu_send_msg(priv, COMMAND_MBOX_SEND_CMD, RSU_GET_SPT_CMD, rsu_get_spt_callback); } } if (ret) { dev_err(dev, "Error, getting SPT table %i\n", ret); if (priv->async) { goto remove_async_client; } else if (!IS_ERR_OR_NULL(priv->get_spt_response_buf)) { stratix10_svc_free_memory(priv->chan, priv->get_spt_response_buf); priv->get_spt_response_buf = NULL; } goto free_channel; } return 0; remove_async_client: stratix10_svc_remove_async_client(priv->chan); free_channel: stratix10_svc_free_channel(priv->chan); return ret; } static void stratix10_rsu_remove(struct platform_device *pdev) { struct stratix10_rsu_priv *priv = platform_get_drvdata(pdev); if (priv->async) stratix10_svc_remove_async_client(priv->chan); stratix10_svc_free_channel(priv->chan); } static struct platform_driver stratix10_rsu_driver = { .probe = stratix10_rsu_probe, .remove = stratix10_rsu_remove, .driver = { .name = "stratix10-rsu", .dev_groups = rsu_groups, }, }; module_platform_driver(stratix10_rsu_driver); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("Intel Remote System Update Driver"); MODULE_AUTHOR("Richard Gong ");