drivers: wifi: Add a sanity check for packet ram

In case we allocate more TX/RX buffers we end up overflowing packet ram
causing issues, so, add a sanity check.

Signed-off-by: Krishna T <[email protected]>

Author: Krishna T

drivers/wifi/nrf700x/osal/hw_if/hal/src/hal_api.c

@@ -17,6 +17,7 @@
 #include "hal_interrupt.h"
 #include "pal.h"
 
+#define RPU_PKTRAM_SIZE (RPU_ADDR_PKTRAM_END - RPU_ADDR_PKTRAM_START + 1)
 
 #ifndef CONFIG_NRF700X_RADIO_TEST
 static enum wifi_nrf_status
@@ -51,6 +52,17 @@ wifi_nrf_hal_rpu_pktram_buf_map_init(struct wifi_nrf_hal_dev_ctx *hal_dev_ctx)
 			  hal_dev_ctx->hpriv->cfg_params.rx_buf_pool[pool_idx - 1].buf_sz));
 	}
 
+	if ((hal_dev_ctx->addr_rpu_pktram_base_rx_pool[MAX_NUM_OF_RX_QUEUES - 1] +
+	     (hal_dev_ctx->hpriv->cfg_params.rx_buf_pool[MAX_NUM_OF_RX_QUEUES - 1].num_bufs *
+	      hal_dev_ctx->hpriv->cfg_params.rx_buf_pool[MAX_NUM_OF_RX_QUEUES - 1].buf_sz)) >
+	    (hal_dev_ctx->addr_rpu_pktram_base + RPU_PKTRAM_SIZE)) {
+		wifi_nrf_osal_log_err(hal_dev_ctx->hpriv->opriv,
+				      "%s: RPU PKTRAM buffer overflowed\n",
+				      __func__);
+		status = WIFI_NRF_STATUS_FAIL;
+		goto out;
+	}
+
 	status = WIFI_NRF_STATUS_SUCCESS;
 out:
 	return status;