qcacmn: Add support to collect pktlogs as part of bugreport

Add infrastructure in pktlog utils to collect pktlogs as part
of bug report generation. As part of this when pktlog read command
is received on host:
1. disable pktlog,
2. read pktlog,
3. clear pktlog buffer,and
4. Retain pktlog initial state

Change-Id: I67e2231c2897007b58fa42a4f931b3c35ad1f418
CRs-Fixed: 2031287

utils/pktlog/linux_ac.c

@@ -534,13 +534,107 @@ static void pktlog_detach(struct ol_txrx_pdev_t *handle)
 
 static int pktlog_open(struct inode *i, struct file *f)
 {
+	struct hif_opaque_softc *scn;
+	struct ol_pktlog_dev_t *pl_dev;
+	struct ath_pktlog_info *pl_info;
+	int ret = 0;
+
 	PKTLOG_MOD_INC_USE_COUNT;
-	return 0;
+	pl_info = (struct ath_pktlog_info *)
+			PDE_DATA(f->f_path.dentry->d_inode);
+
+	if (!pl_info) {
+		pr_err("%s: pl_info NULL", __func__);
+		return -EINVAL;
+	}
+
+	if (pl_info->curr_pkt_state != PKTLOG_OPR_NOT_IN_PROGRESS) {
+		pr_info("%s: plinfo state (%d) != PKTLOG_OPR_NOT_IN_PROGRESS",
+			__func__, pl_info->curr_pkt_state);
+		return -EBUSY;
+	}
+
+	pl_info->curr_pkt_state = PKTLOG_OPR_IN_PROGRESS_READ_START;
+	scn = cds_get_context(QDF_MODULE_ID_HIF);
+	if (!scn) {
+		pl_info->curr_pkt_state = PKTLOG_OPR_NOT_IN_PROGRESS;
+		qdf_print("%s: Invalid scn context\n", __func__);
+		ASSERT(0);
+		return -EINVAL;
+	}
+
+	pl_dev = cds_get_pl_handle();
+
+	if (!pl_dev) {
+		pl_info->curr_pkt_state = PKTLOG_OPR_NOT_IN_PROGRESS;
+		qdf_print("%s: Invalid pktlog handle\n", __func__);
+		ASSERT(0);
+		return -ENODEV;
+	}
+
+	pl_info->init_saved_state = pl_info->log_state;
+	if (!pl_info->log_state) {
+		/* Pktlog is already disabled.
+		 * Proceed to read directly.
+		 */
+		pl_info->curr_pkt_state =
+			PKTLOG_OPR_IN_PROGRESS_READ_START_PKTLOG_DISABLED;
+		return ret;
+	}
+	/* Disbable the pktlog internally. */
+	ret = pl_dev->pl_funcs->pktlog_disable(scn);
+	pl_info->log_state = 0;
+	pl_info->curr_pkt_state =
+			PKTLOG_OPR_IN_PROGRESS_READ_START_PKTLOG_DISABLED;
+	return ret;
 }
 
 static int pktlog_release(struct inode *i, struct file *f)
 {
+	struct hif_opaque_softc *scn;
+	struct ol_pktlog_dev_t *pl_dev;
+	struct ath_pktlog_info *pl_info;
+	int ret = 0;
+
 	PKTLOG_MOD_DEC_USE_COUNT;
+
+	pl_info = (struct ath_pktlog_info *)
+			PDE_DATA(f->f_path.dentry->d_inode);
+
+	if (!pl_info)
+		return -EINVAL;
+
+	scn = cds_get_context(QDF_MODULE_ID_HIF);
+	if (!scn) {
+		pl_info->curr_pkt_state = PKTLOG_OPR_NOT_IN_PROGRESS;
+		qdf_print("%s: Invalid scn context\n", __func__);
+		ASSERT(0);
+		return -EINVAL;
+	}
+
+	pl_dev = cds_get_pl_handle();
+
+	if (!pl_dev) {
+		pl_info->curr_pkt_state = PKTLOG_OPR_NOT_IN_PROGRESS;
+		qdf_print("%s: Invalid pktlog handle\n", __func__);
+		ASSERT(0);
+		return -ENODEV;
+	}
+
+	pl_info->curr_pkt_state = PKTLOG_OPR_IN_PROGRESS_READ_COMPLETE;
+	/*clear pktlog buffer.*/
+	pktlog_clearbuff(scn, true);
+	pl_info->log_state = pl_info->init_saved_state;
+	pl_info->init_saved_state = 0;
+
+	/*Enable pktlog again*/
+	ret = pl_dev->pl_funcs->pktlog_enable(
+			(struct hif_opaque_softc *)scn, pl_info->log_state,
+			cds_is_packet_log_enabled(), 0, 1);
+	if (ret != 0)
+		pr_warn("%s: pktlog cannot be enabled", __func__);
+
+	pl_info->curr_pkt_state = PKTLOG_OPR_NOT_IN_PROGRESS;
 	return 0;
 }