diff options
author | Avraham Stern <avraham.stern@intel.com> | 2022-11-02 16:59:55 +0200 |
---|---|---|
committer | Gregory Greenman <gregory.greenman@intel.com> | 2022-11-10 13:27:00 +0200 |
commit | 733eb54f62c6f07938c83cac6ef69afc28ca7e6c (patch) | |
tree | 8d5edabdfb264b04af8df04532b4cbc57be6f909 /drivers/net/wireless/intel/iwlwifi/mei | |
parent | ef2e7a51095012673b9b72dabe343333f537c826 (diff) | |
download | linux-stable-733eb54f62c6f07938c83cac6ef69afc28ca7e6c.tar.gz linux-stable-733eb54f62c6f07938c83cac6ef69afc28ca7e6c.tar.bz2 linux-stable-733eb54f62c6f07938c83cac6ef69afc28ca7e6c.zip |
wifi: iwlwifi: mei: implement PLDR flow
If the FW needs to do OTP re-read, the driver must notify CSME before
loading the FW so CSME will not try to access the NIC during the
re-read. Once the alive notification is received, CSME is notified
that NIC access is allowed again.
Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20221102165239.49eb8c6d455f.I7f0a5debb2d3d662a4151199bbec24613f324c13@changeid
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mei')
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mei/iwl-mei.h | 21 | ||||
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mei/main.c | 100 | ||||
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mei/sap.h | 51 |
3 files changed, 172 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mei/iwl-mei.h b/drivers/net/wireless/intel/iwlwifi/mei/iwl-mei.h index 2e57438a70f0..2b639eef595d 100644 --- a/drivers/net/wireless/intel/iwlwifi/mei/iwl-mei.h +++ b/drivers/net/wireless/intel/iwlwifi/mei/iwl-mei.h @@ -453,6 +453,21 @@ void iwl_mei_host_disassociated(void); */ void iwl_mei_device_state(bool up); +/** + * iwl_mei_pldr_req() - must be called before loading the fw + * + * Return: 0 if the PLDR flow was successful and the fw can be loaded, negative + * value otherwise. + */ +int iwl_mei_pldr_req(void); + +/** + * iwl_mei_alive_notif() - must be called when alive notificaiton is received + * @success: true if received alive notification, false if waiting for the + * notificaiton timed out. + */ +void iwl_mei_alive_notif(bool success); + #else static inline bool iwl_mei_is_connected(void) @@ -503,6 +518,12 @@ static inline void iwl_mei_host_disassociated(void) static inline void iwl_mei_device_state(bool up) {} +static inline int iwl_mei_pldr_req(void) +{ return 0; } + +static inline void iwl_mei_alive_notif(bool success) +{} + #endif /* CONFIG_IWLMEI */ #endif /* __iwl_mei_h__ */ diff --git a/drivers/net/wireless/intel/iwlwifi/mei/main.c b/drivers/net/wireless/intel/iwlwifi/mei/main.c index c0142093c768..a467da8b2aed 100644 --- a/drivers/net/wireless/intel/iwlwifi/mei/main.c +++ b/drivers/net/wireless/intel/iwlwifi/mei/main.c @@ -150,6 +150,8 @@ struct iwl_mei_filters { * @device_down: true if the device is down. Used to remember to send * CSME_OWNERSHIP_CONFIRMED when the driver is already down. * @csa_throttle_end_wk: used when &csa_throttled is true + * @pldr_wq: the wait queue for PLDR flow + * @pldr_active: PLDR flow is in progress * @data_q_lock: protects the access to the data queues which are * accessed without the mutex. * @netdev_work: used to defer registering and unregistering of the netdev to @@ -173,6 +175,8 @@ struct iwl_mei { bool link_prot_state; bool device_down; struct delayed_work csa_throttle_end_wk; + wait_queue_head_t pldr_wq; + bool pldr_active; spinlock_t data_q_lock; struct work_struct netdev_work; @@ -881,6 +885,15 @@ static void iwl_mei_handle_rx_host_own_req(struct mei_cl_device *cldev, iwl_mei_cache.ops->rfkill(iwl_mei_cache.priv, false); } +static void iwl_mei_handle_pldr_ack(struct mei_cl_device *cldev, + const struct iwl_sap_pldr_ack_data *ack) +{ + struct iwl_mei *mei = mei_cldev_get_drvdata(cldev); + + mei->pldr_active = le32_to_cpu(ack->status) == SAP_PLDR_STATUS_SUCCESS; + wake_up_all(&mei->pldr_wq); +} + static void iwl_mei_handle_ping(struct mei_cl_device *cldev, const struct iwl_sap_hdr *hdr) { @@ -961,6 +974,8 @@ static void iwl_mei_handle_sap_msg(struct mei_cl_device *cldev, iwl_mei_handle_can_release_ownership, 0); SAP_MSG_HANDLER(CSME_TAKING_OWNERSHIP, iwl_mei_handle_csme_taking_ownership, 0); + SAP_MSG_HANDLER(PLDR_ACK, iwl_mei_handle_pldr_ack, + sizeof(struct iwl_sap_pldr_ack_data)); default: /* * This is not really an error, there are message that we decided @@ -1337,6 +1352,62 @@ out: } EXPORT_SYMBOL_GPL(iwl_mei_get_nvm); +#define IWL_MEI_PLDR_NUM_RETRIES 3 + +int iwl_mei_pldr_req(void) +{ + struct iwl_mei *mei; + int ret; + struct iwl_sap_pldr_data msg = { + .hdr.type = cpu_to_le16(SAP_MSG_NOTIF_PLDR), + .hdr.len = cpu_to_le16(sizeof(msg) - sizeof(msg.hdr)), + }; + int i; + + mutex_lock(&iwl_mei_mutex); + + /* In case we didn't have a bind */ + if (!iwl_mei_is_connected()) { + ret = 0; + goto out; + } + + mei = mei_cldev_get_drvdata(iwl_mei_global_cldev); + + if (!mei) { + ret = -ENODEV; + goto out; + } + + if (!mei->amt_enabled) { + ret = 0; + goto out; + } + + for (i = 0; i < IWL_MEI_PLDR_NUM_RETRIES; i++) { + ret = iwl_mei_send_sap_msg_payload(mei->cldev, &msg.hdr); + mutex_unlock(&iwl_mei_mutex); + if (ret) + return ret; + + ret = wait_event_timeout(mei->pldr_wq, mei->pldr_active, HZ / 2); + if (ret) + break; + + /* Take the mutex for the next iteration */ + mutex_lock(&iwl_mei_mutex); + } + + if (ret) + return 0; + + ret = -ETIMEDOUT; +out: + mutex_unlock(&iwl_mei_mutex); + return ret; +} +EXPORT_SYMBOL_GPL(iwl_mei_pldr_req); + int iwl_mei_get_ownership(void) { struct iwl_mei *mei; @@ -1402,6 +1473,33 @@ out: } EXPORT_SYMBOL_GPL(iwl_mei_get_ownership); +void iwl_mei_alive_notif(bool success) +{ + struct iwl_mei *mei; + struct iwl_sap_pldr_end_data msg = { + .hdr.type = cpu_to_le16(SAP_MSG_NOTIF_PLDR_END), + .hdr.len = cpu_to_le16(sizeof(msg) - sizeof(msg.hdr)), + .status = success ? cpu_to_le32(SAP_PLDR_STATUS_SUCCESS) : + cpu_to_le32(SAP_PLDR_STATUS_FAILURE), + }; + + mutex_lock(&iwl_mei_mutex); + + if (!iwl_mei_is_connected()) + goto out; + + mei = mei_cldev_get_drvdata(iwl_mei_global_cldev); + if (!mei || !mei->pldr_active) + goto out; + + mei->pldr_active = false; + + iwl_mei_send_sap_msg_payload(mei->cldev, &msg.hdr); +out: + mutex_unlock(&iwl_mei_mutex); +} +EXPORT_SYMBOL_GPL(iwl_mei_alive_notif); + void iwl_mei_host_associated(const struct iwl_mei_conn_info *conn_info, const struct iwl_mei_colloc_info *colloc_info) { @@ -1841,6 +1939,7 @@ static int iwl_mei_probe(struct mei_cl_device *cldev, INIT_DELAYED_WORK(&mei->csa_throttle_end_wk, iwl_mei_csa_throttle_end_wk); init_waitqueue_head(&mei->get_ownership_wq); + init_waitqueue_head(&mei->pldr_wq); spin_lock_init(&mei->data_q_lock); INIT_WORK(&mei->netdev_work, iwl_mei_netdev_work); @@ -2013,6 +2112,7 @@ static void iwl_mei_remove(struct mei_cl_device *cldev) * the device. */ wake_up_all(&mei->get_ownership_wq); + wake_up_all(&mei->pldr_wq); mutex_lock(&iwl_mei_mutex); diff --git a/drivers/net/wireless/intel/iwlwifi/mei/sap.h b/drivers/net/wireless/intel/iwlwifi/mei/sap.h index ef2664589fc1..6c0ad4adbf32 100644 --- a/drivers/net/wireless/intel/iwlwifi/mei/sap.h +++ b/drivers/net/wireless/intel/iwlwifi/mei/sap.h @@ -203,6 +203,7 @@ struct iwl_sap_me_msg_start_ok { * @SAP_MSG_NOTIF_NIC_OWNER: Payload is a DW. See &enum iwl_sap_nic_owner. * @SAP_MSG_NOTIF_CSME_CONN_STATUS: See &struct iwl_sap_notif_conn_status. * @SAP_MSG_NOTIF_NVM: See &struct iwl_sap_nvm. + * @SAP_MSG_NOTIF_PLDR_ACK: See &struct iwl_sap_pldr_ack_data. * @SAP_MSG_NOTIF_FROM_CSME_MAX: Not used. * * @SAP_MSG_NOTIF_FROM_HOST_MIN: Not used. @@ -226,6 +227,8 @@ struct iwl_sap_me_msg_start_ok { * @SAP_MSG_NOTIF_HOST_OWNERSHIP_CONFIRMED: No payload. * @SAP_MSG_NOTIF_SAR_LIMITS: See &struct iwl_sap_notif_sar_limits. * @SAP_MSG_NOTIF_GET_NVM: No payload. Triggers %SAP_MSG_NOTIF_NVM. + * @SAP_MSG_NOTIF_PLDR: See &struct iwl_sap_pldr_data. + * @SAP_MSG_NOTIF_PLDR_END: See &struct iwl_sap_pldr_end_data. * @SAP_MSG_NOTIF_FROM_HOST_MAX: Not used. * * @SAP_MSG_DATA_MIN: Not used. @@ -258,6 +261,8 @@ enum iwl_sap_msg { SAP_MSG_NOTIF_NIC_OWNER = 511, SAP_MSG_NOTIF_CSME_CONN_STATUS = 512, SAP_MSG_NOTIF_NVM = 513, + /* 514 - 517 not supported */ + SAP_MSG_NOTIF_PLDR_ACK = 518, SAP_MSG_NOTIF_FROM_CSME_MAX, SAP_MSG_NOTIF_FROM_HOST_MIN = 1000, @@ -279,6 +284,9 @@ enum iwl_sap_msg { SAP_MSG_NOTIF_HOST_OWNERSHIP_CONFIRMED = 1015, SAP_MSG_NOTIF_SAR_LIMITS = 1016, SAP_MSG_NOTIF_GET_NVM = 1017, + /* 1018 - 1023 not supported */ + SAP_MSG_NOTIF_PLDR = 1024, + SAP_MSG_NOTIF_PLDR_END = 1025, SAP_MSG_NOTIF_FROM_HOST_MAX, SAP_MSG_DATA_MIN = 2000, @@ -732,4 +740,47 @@ struct iwl_sap_cb_data { u8 payload[]; }; +/** + * struct iwl_sap_pldr_data - payload of %SAP_MSG_NOTIF_PLDR + * @hdr: The SAP header. + * @version: SAP message version + */ +struct iwl_sap_pldr_data { + struct iwl_sap_hdr hdr; + __le32 version; +} __packed; + +/** + * enum iwl_sap_pldr_status - + * @SAP_PLDR_STATUS_SUCCESS: PLDR started/ended successfully + * @SAP_PLDR_STATUS_FAILURE: PLDR failed to start/end + */ +enum iwl_sap_pldr_status { + SAP_PLDR_STATUS_SUCCESS = 0, + SAP_PLDR_STATUS_FAILURE = 1, +}; + +/* + * struct iwl_sap_pldr_end_data - payload of %SAP_MSG_NOTIF_PLDR_END + * @hdr: The SAP header. + * @version: SAP message version + * @status: PLDR end status + */ +struct iwl_sap_pldr_end_data { + struct iwl_sap_hdr hdr; + __le32 version; + __le32 status; +} __packed; + +/* + * struct iwl_sap_pldr_ack_data - payload of %SAP_MSG_NOTIF_PLDR_ACK + * @version: SAP message version + * @status: CSME accept/refuse to the PLDR request + */ +struct iwl_sap_pldr_ack_data { + struct iwl_sap_hdr hdr; + __le32 version; + __le32 status; +} __packed; + #endif /* __sap_h__ */ |