qcacmn: add support for DDR mapped IPA doorbell

Add support for DDR mapped IPA doorbell addresses.

Change-Id: I3a0d03ff4435ea12a6e07d4ae75012f2c85e32c9
CRs-Fixed: 2782267

dp/wifi3.0/dp_ipa.c

@@ -317,7 +317,8 @@ static void dp_tx_ipa_uc_detach(struct dp_soc *soc, struct dp_pdev *pdev)
 	soc->ipa_uc_tx_rsc.tx_buf_pool_vaddr_unaligned = NULL;
 
 	ipa_res = &pdev->ipa_resource;
-	iounmap(ipa_res->tx_comp_doorbell_vaddr);
+	if (!ipa_res->is_db_ddr_mapped)
+		iounmap(ipa_res->tx_comp_doorbell_vaddr);
 
 	qdf_mem_free_sgtable(&ipa_res->tx_ring.sgtable);
 	qdf_mem_free_sgtable(&ipa_res->tx_comp_ring.sgtable);
@@ -763,7 +764,11 @@ QDF_STATUS dp_ipa_set_doorbell_paddr(struct cdp_soc_t *soc_hdl, uint8_t pdev_id)
 	if (!wlan_cfg_is_ipa_enabled(soc->wlan_cfg_ctx))
 		return QDF_STATUS_SUCCESS;
 
-	ipa_res->tx_comp_doorbell_vaddr =
+	if (ipa_res->is_db_ddr_mapped)
+		ipa_res->tx_comp_doorbell_vaddr =
+				phys_to_virt(ipa_res->tx_comp_doorbell_paddr);
+	else
+		ipa_res->tx_comp_doorbell_vaddr =
 				ioremap(ipa_res->tx_comp_doorbell_paddr, 4);
 
 	if (qdf_mem_smmu_s1_enabled(soc->osdev)) {
@@ -1311,6 +1316,9 @@ QDF_STATUS dp_ipa_setup(struct cdp_soc_t *soc_hdl, uint8_t pdev_id,
 	ipa_res->rx_ready_doorbell_paddr =
 		QDF_IPA_WDI_CONN_OUT_PARAMS_RX_UC_DB_PA(&pipe_out);
 
+	ipa_res->is_db_ddr_mapped =
+		QDF_IPA_WDI_CONN_OUT_PARAMS_IS_DB_DDR_MAPPED(&pipe_out);
+
 	soc->ipa_first_tx_db_access = true;
 
 	return QDF_STATUS_SUCCESS;

dp/wifi3.0/dp_types.h

@@ -1704,6 +1704,8 @@ struct dp_ipa_resources {
 	qdf_dma_addr_t tx_comp_doorbell_paddr;
 	uint32_t *tx_comp_doorbell_vaddr;
 	qdf_dma_addr_t rx_ready_doorbell_paddr;
+
+	bool is_db_ddr_mapped;
 };
 #endif
 

qdf/inc/qdf_ipa_wdi3.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -260,6 +260,8 @@ typedef __qdf_ipa_wdi_conn_out_params_t qdf_ipa_wdi_conn_out_params_t;
 	__QDF_IPA_WDI_CONN_OUT_PARAMS_TX_UC_DB_VA(pipe_out)
 #define QDF_IPA_WDI_CONN_OUT_PARAMS_RX_UC_DB_PA(pipe_out)	\
 	__QDF_IPA_WDI_CONN_OUT_PARAMS_RX_UC_DB_PA(pipe_out)
+#define QDF_IPA_WDI_CONN_OUT_PARAMS_IS_DB_DDR_MAPPED(pipe_out)	\
+	__QDF_IPA_WDI_CONN_OUT_PARAMS_IS_DB_DDR_MAPPED(pipe_out)
 
 /**
  * qdf_ipa_wdi_perf_profile_t - To set BandWidth profile

qdf/linux/src/i_qdf_ipa_wdi3.h

@@ -222,6 +222,12 @@ typedef struct ipa_wdi_conn_out_params  __qdf_ipa_wdi_conn_out_params_t;
 	(((struct ipa_wdi_conn_out_params *)(pipe_out))->tx_uc_db_pa)
 #define __QDF_IPA_WDI_CONN_OUT_PARAMS_RX_UC_DB_PA(pipe_out)	\
 	(((struct ipa_wdi_conn_out_params *)(pipe_out))->rx_uc_db_pa)
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0))
+#define __QDF_IPA_WDI_CONN_OUT_PARAMS_IS_DB_DDR_MAPPED(pipe_out)	\
+	(((struct ipa_wdi_conn_out_params *)(pipe_out))->is_ddr_mapped)
+#else
+#define __QDF_IPA_WDI_CONN_OUT_PARAMS_IS_DB_DDR_MAPPED(pipe_out) false
+#endif
 
 /**
  * __qdf_ipa_wdi_perf_profile_t - To set BandWidth profile