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@@ -62,6 +62,7 @@
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#include "qdf_types.h"
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#include "cds_packet.h"
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#include "qdf_mem.h"
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+#include "cds_concurrency.h"
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void lim_log_session_states(tpAniSirGlobal pMac);
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static void lim_process_normal_hdd_msg(tpAniSirGlobal mac_ctx,
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@@ -1146,6 +1147,210 @@ void lim_process_oem_data_rsp(tpAniSirGlobal pMac, uint32_t *body)
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#endif
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+/**
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+ * lim_handle_hw_mode_change_on_csa() - Do HW mode change on CSA for STA mode
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+ * @mac_ctx: Global MAC context
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+ * @msg: Received message
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+ *
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+ * Checks if hw mode change is required for the new channel.
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+ * If MCC upgrade is required, this function will start the opportunistic
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+ * timer and the caller will invoke the other APIs to perform vdev restart on
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+ * the new channel.
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+ *
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+ * If DBS downgrade is required, this function will initiate the hw mode
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+ * change and vdev restart will happen on the new channel after getting hw
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+ * mode response
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+ *
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+ * Return: QDF_STATUS_SUCCESS if processing of csa params (and hence vdev
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+ * restart) needs to happen or if no hw mode change is required,
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+ * QDF_STATUS_E_FAILURE otherwise.
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+ */
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+static QDF_STATUS lim_handle_hw_mode_change_on_csa(tpAniSirGlobal mac_ctx,
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+ tpSirMsgQ msg)
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+{
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+ tpPESession session_entry;
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+ struct csa_offload_params *csa_params =
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+ (struct csa_offload_params *) (msg->bodyptr);
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+ tpDphHashNode sta_ds = NULL;
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+ uint8_t session_id;
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+ uint16_t aid = 0;
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+ enum cds_conc_next_action action;
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+ QDF_STATUS status = QDF_STATUS_E_FAILURE;
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+
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+ lim_log(mac_ctx, LOG1, FL("handle hw mode change for csa"));
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+
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+ if (!csa_params) {
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+ lim_log(mac_ctx, LOGE, FL("limMsgQ body ptr is NULL"));
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+ /* qdf_mem_free() can handle NULL values */
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+ goto err;
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+ }
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+
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+ session_entry = pe_find_session_by_bssid(mac_ctx,
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+ csa_params->bssId, &session_id);
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+ if (!session_entry) {
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+ lim_log(mac_ctx, LOGE, FL("Session does not exist"));
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+ goto err;
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+ }
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+
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+ sta_ds = dph_lookup_hash_entry(mac_ctx, session_entry->bssId, &aid,
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+ &session_entry->dph.dphHashTable);
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+
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+ if (!sta_ds) {
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+ lim_log(mac_ctx, LOGE, FL("sta_ds does not exist"));
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+ goto err;
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+ }
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+
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+ /* Since all the write to the policy manager table happens in the
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+ * MC thread context and this channel change event is also processed
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+ * in the MC thread context, explicit lock/unlock of qdf_conc_list_lock
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+ * is not done here
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+ */
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+ action = cds_get_pref_hw_mode_for_chan(session_entry->smeSessionId,
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+ csa_params->channel);
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+
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+ if (action == CDS_NOP) {
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+ lim_log(mac_ctx, LOG1, FL("no need for hw mode change"));
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+ /* Proceed with processing csa params. So, not freeing it */
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+ return QDF_STATUS_SUCCESS;
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+ }
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+
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+ lim_log(mac_ctx, LOG1, FL("session:%d action:%d"),
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+ session_entry->smeSessionId, action);
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+
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+ /* 1. Start opportunistic timer
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+ * 2. Do vdev restart on the new channel (by the caller)
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+ * 3. PM will check if MCC upgrade can be done after timer expiry
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+ */
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+ if (action == CDS_MCC_UPGRADE) {
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+ status = cds_stop_start_opportunistic_timer();
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+ if (QDF_IS_STATUS_SUCCESS(status))
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+ lim_log(mac_ctx, LOG1,
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+ FL("opportunistic timer for MCC upgrade"));
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+
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+ /* After opportunistic timer is triggered, we can go ahead
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+ * with processing the csa params. So, not freeing the memory
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+ * through 'err' label.
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+ */
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+ return QDF_STATUS_SUCCESS;
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+ }
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+
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+ /* CDS_DBS_DOWNGRADE:
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+ * 1. PM will initiate HW mode change to DBS rightaway
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+ * 2. Do vdev restart on the new channel (on getting hw mode resp)
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+ */
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+ status = cds_next_actions(session_entry->smeSessionId, action,
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+ CDS_UPDATE_REASON_CHANNEL_SWITCH_STA);
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+ if (!QDF_IS_STATUS_SUCCESS(status)) {
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+ lim_log(mac_ctx, LOGE, FL("no set hw mode command was issued"));
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+ /* Proceed with processing csa params. So, not freeing it */
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+ return QDF_STATUS_SUCCESS;
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+ } else {
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+ /* Save the csa params to be used after DBS downgrade */
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+ qdf_mem_copy(&session_entry->saved_csa_params, csa_params,
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+ sizeof(session_entry->saved_csa_params));
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+
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+ lim_log(mac_ctx, LOG1,
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+ FL("saved csa params for dbs downgrade for %pM"),
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+ session_entry->saved_csa_params.bssId);
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+
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+ /* Returning error so that csa params are not processed here */
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+ status = QDF_STATUS_E_FAILURE;
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+ }
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+
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+err:
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+ qdf_mem_free(csa_params);
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+ return status;
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+}
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+
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+/**
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+ * lim_handle_hw_mode_change_on_csa_event() - Handle hw mode change on csa
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+ * @mac_ctx: Pointer to the Global Mac Context
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+ * @msg: Received message
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+ *
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+ * Checks if a hw mode change is required for the received csa event. Processes
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+ * csa params and do vdev restart immediately if the there is no need for a hw
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+ * mode change or if MCC upgrade is required
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+ *
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+ * Return: None
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+ */
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+static void lim_handle_hw_mode_change_on_csa_event(tpAniSirGlobal mac_ctx,
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+ tpSirMsgQ msg)
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+{
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+ QDF_STATUS qdf_status;
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+
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+ lim_log(mac_ctx, LOG1, FL("lim received csa offload event"));
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+ if (mac_ctx->policy_manager_enabled &&
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+ wma_is_hw_dbs_capable() == true) {
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+ /* Check if a hw mode change is required */
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+ qdf_status = lim_handle_hw_mode_change_on_csa(mac_ctx,
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+ msg);
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+ /* Process csa params and do vdev restart immediately if
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+ * there is no need for a hw mode change or if MCC upgrade is
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+ * required.
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+ */
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+ if (QDF_IS_STATUS_SUCCESS(qdf_status))
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+ lim_handle_csa_offload_msg(mac_ctx, msg);
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+ } else {
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+ lim_handle_csa_offload_msg(mac_ctx, msg);
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+ }
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+}
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+
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+/**
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+ * lim_handle_csa_event_post_dbs_downgrade() - Process csa event post dbs
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+ * downgrade
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+ * @mac_ctx: Pointer to the Global Mac Context
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+ * @msg: Received message
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+ *
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+ * Process the csa event to do vdev restart on the new channel after the dbs
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+ * downgrade. If there was a DBS downgrade as part of the event
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+ * WMA_CSA_OFFLOAD_EVENT, SIR_LIM_CSA_POST_HW_MODE_CHANGE will be received after
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+ * receiving the set hw mode response, where this processing will happen.
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+ *
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+ * Return: None
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+ */
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+static void lim_handle_csa_event_post_dbs_downgrade(tpAniSirGlobal mac_ctx,
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+ tpSirMsgQ msg)
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+{
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+ tSirMsgQ csa_msg;
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+ tpPESession session_entry;
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+
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+ struct sir_saved_csa_params *buf =
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+ (struct sir_saved_csa_params *)msg->bodyptr;
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+
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+ /* Null check for 'msg' already done before coming here in the caller */
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+
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+ session_entry = pe_find_session_by_sme_session_id(mac_ctx,
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+ buf->session_id);
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+ if (!session_entry) {
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+ lim_log(mac_ctx, LOGE, FL("Invalid session id:%d"),
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+ buf->session_id);
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+ return;
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+ }
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+
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+ lim_log(mac_ctx, LOG1,
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+ FL("received csa offload event post hw change for %pM"),
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+ session_entry->saved_csa_params.bssId);
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+
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+ csa_msg.bodyptr = qdf_mem_malloc(
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+ sizeof(struct csa_offload_params));
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+ if (!csa_msg.bodyptr) {
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+ lim_log(mac_ctx, LOGE, FL("malloc failed for csa msg"));
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+ goto clean_msg_body;
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+ }
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+
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+ qdf_mem_copy((void *)csa_msg.bodyptr,
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+ (void *)&session_entry->saved_csa_params,
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+ sizeof(struct csa_offload_params));
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+ /* If there was a DBS downgrade as part of the event
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+ * WMA_CSA_OFFLOAD_EVENT, SIR_LIM_CSA_POST_HW_MODE_CHANGE will
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+ * be received after receiving the set hw mode response.
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+ */
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+ lim_handle_csa_offload_msg(mac_ctx, &csa_msg);
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+clean_msg_body:
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+ if (msg->bodyptr)
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+ qdf_mem_free(msg->bodyptr);
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+}
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+
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/**
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* lim_process_messages() - Process messages from upper layers.
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*
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@@ -1605,7 +1810,10 @@ void lim_process_messages(tpAniSirGlobal mac_ctx, tpSirMsgQ msg)
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lim_handle_delete_bss_rsp(mac_ctx, msg);
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break;
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case WMA_CSA_OFFLOAD_EVENT:
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- lim_handle_csa_offload_msg(mac_ctx, msg);
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+ lim_handle_hw_mode_change_on_csa_event(mac_ctx, msg);
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+ break;
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+ case SIR_LIM_CSA_POST_HW_MODE_CHANGE:
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+ lim_handle_csa_event_post_dbs_downgrade(mac_ctx, msg);
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break;
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case WMA_SET_BSSKEY_RSP:
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case WMA_SET_STA_BCASTKEY_RSP:
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Chandrasekaran, Manishekar