msm: ipa: Add support to configure WAN RX desc size

Embedded tputs depend on WAN RX desc size, but, every target
has its own limitations of memory and embedded tputs goals.
So, add parameter to configure WAN RX desc size through device tree.

Change-Id: I28c550058dd990c9c8cd368a2677097c7f057ccd
CRs-Fixed: 1081543
Signed-off-by: Sunil Paidimarri <hisunil@codeaurora.org>

6 files changed, 63 insertions, 34 deletions

diff --git a/drivers/platform/msm/ipa/ipa_v2/ipa_dp.c b/drivers/platform/msm/ipa/ipa_v2/ipa_dp.c
index 3c2a6d4620ba..3afd9c61daca 100644
--- a/drivers/platform/msm/ipa/ipa_v2/ipa_dp.c
+++ b/drivers/platform/msm/ipa/ipa_v2/ipa_dp.c
@@ -18,6 +18,7 @@
 #include "ipa_i.h"
 #include "ipa_trace.h"
 
+#define IPA_WAN_AGGR_PKT_CNT 5
 #define IPA_LAST_DESC_CNT 0xFFFF
 #define POLLING_INACTIVITY_RX 40
 #define POLLING_INACTIVITY_TX 40
@@ -1099,16 +1100,18 @@ int ipa2_rx_poll(u32 clnt_hdl, int weight)
 			break;
 
 		ipa_wq_rx_common(ep->sys, iov.size);
-		cnt += 5;
+		cnt += IPA_WAN_AGGR_PKT_CNT;
 	};
 
-	if (cnt == 0) {
+	if (cnt == 0 || cnt < weight) {
 		ep->inactive_cycles++;
 		ep->client_notify(ep->priv, IPA_CLIENT_COMP_NAPI, 0);
 
 		if (ep->inactive_cycles > 3 || ep->sys->len == 0) {
 			ep->switch_to_intr = true;
 			delay = 0;
+		} else if (cnt < weight) {
+			delay = 0;
 		}
 		queue_delayed_work(ep->sys->wq,
 			&ep->sys->switch_to_intr_work, msecs_to_jiffies(delay));
@@ -3162,14 +3165,9 @@ static int ipa_assign_policy_v2(struct ipa_sys_connect_params *in,
 				sys->repl_hdlr =
 				   ipa_replenish_rx_cache;
 			}
-			if (in->napi_enabled) {
-				sys->rx_pool_sz =
-					   IPA_WAN_NAPI_CONS_RX_POOL_SZ;
-				if (in->recycle_enabled) {
-					sys->repl_hdlr =
-					   ipa_replenish_rx_cache_recycle;
-				}
-			}
+			if (in->napi_enabled && in->recycle_enabled)
+				sys->repl_hdlr =
+					ipa_replenish_rx_cache_recycle;
 			sys->ep->wakelock_client =
 			   IPA_WAKELOCK_REF_CLIENT_WAN_RX;
 			in->ipa_ep_cfg.aggr.aggr_sw_eof_active
diff --git a/drivers/platform/msm/ipa/ipa_v2/ipa_i.h b/drivers/platform/msm/ipa/ipa_v2/ipa_i.h
index 73206abf9cfd..866170d3324d 100644
--- a/drivers/platform/msm/ipa/ipa_v2/ipa_i.h
+++ b/drivers/platform/msm/ipa/ipa_v2/ipa_i.h
@@ -51,8 +51,6 @@
 #define IPA_UC_FINISH_MAX 6
 #define IPA_UC_WAIT_MIN_SLEEP 1000
 #define IPA_UC_WAII_MAX_SLEEP 1200
-#define IPA_WAN_NAPI_CONS_RX_POOL_SZ (IPA_GENERIC_RX_POOL_SZ*3)
-#define IPA_WAN_CONS_DESC_FIFO_SZ (IPA_SYS_DESC_FIFO_SZ*3)
 
 #define IPA_MAX_STATUS_STAT_NUM 30
 
diff --git a/drivers/platform/msm/ipa/ipa_v2/rmnet_ipa.c b/drivers/platform/msm/ipa/ipa_v2/rmnet_ipa.c
index 520f139ee38a..c2e43a62ab69 100644
--- a/drivers/platform/msm/ipa/ipa_v2/rmnet_ipa.c
+++ b/drivers/platform/msm/ipa/ipa_v2/rmnet_ipa.c
@@ -62,6 +62,7 @@
 #define IPA_UEVENT_NUM_EVNP 4 /* number of event pointers */
 
 #define NAPI_WEIGHT 60
+#define IPA_WWAN_CONS_DESC_FIFO_SZ 1024
 
 static struct net_device *ipa_netdevs[IPA_WWAN_DEVICE_COUNT];
 static struct ipa_sys_connect_params apps_to_ipa_ep_cfg, ipa_to_apps_ep_cfg;
@@ -100,6 +101,7 @@ struct ipa_rmnet_plat_drv_res {
 	bool ipa_loaduC;
 	bool ipa_advertise_sg_support;
 	bool ipa_napi_enable;
+	u32 wan_rx_desc_size;
 };
 
 static struct ipa_rmnet_plat_drv_res ipa_rmnet_res;
@@ -1291,10 +1293,8 @@ static int handle_ingress_format(struct net_device *dev,
 	ipa_to_apps_ep_cfg.priv = dev;
 
 	ipa_to_apps_ep_cfg.napi_enabled = ipa_rmnet_res.ipa_napi_enable;
-	if (ipa_to_apps_ep_cfg.napi_enabled)
-		ipa_to_apps_ep_cfg.desc_fifo_sz = IPA_WAN_CONS_DESC_FIFO_SZ;
-	else
-		ipa_to_apps_ep_cfg.desc_fifo_sz = IPA_SYS_DESC_FIFO_SZ;
+	ipa_to_apps_ep_cfg.desc_fifo_sz =
+		ipa_rmnet_res.wan_rx_desc_size * sizeof(struct sps_iovec);
 
 	mutex_lock(&ipa_to_apps_pipe_handle_guard);
 	if (atomic_read(&is_ssr)) {
@@ -1925,6 +1925,9 @@ static struct notifier_block ssr_notifier = {
 static int get_ipa_rmnet_dts_configuration(struct platform_device *pdev,
 		struct ipa_rmnet_plat_drv_res *ipa_rmnet_drv_res)
 {
+	int result;
+
+	ipa_rmnet_drv_res->wan_rx_desc_size = IPA_WWAN_CONS_DESC_FIFO_SZ;
 	ipa_rmnet_drv_res->ipa_rmnet_ssr =
 			of_property_read_bool(pdev->dev.of_node,
 			"qcom,rmnet-ipa-ssr");
@@ -1947,6 +1950,18 @@ static int get_ipa_rmnet_dts_configuration(struct platform_device *pdev,
 			"qcom,ipa-napi-enable");
 	pr_info("IPA Napi Enable = %s\n",
 		ipa_rmnet_drv_res->ipa_napi_enable ? "True" : "False");
+
+	/* Get IPA WAN RX desc fifo size */
+	result = of_property_read_u32(pdev->dev.of_node,
+			"qcom,wan-rx-desc-size",
+			&ipa_rmnet_drv_res->wan_rx_desc_size);
+	if (result)
+		pr_info("using default for wan-rx-desc-size = %u\n",
+				ipa_rmnet_drv_res->wan_rx_desc_size);
+	else
+		IPAWANDBG(": found ipa_drv_res->wan-rx-desc-size = %u\n",
+				ipa_rmnet_drv_res->wan_rx_desc_size);
+
 	return 0;
 }
 
diff --git a/drivers/platform/msm/ipa/ipa_v3/ipa_dp.c b/drivers/platform/msm/ipa/ipa_v3/ipa_dp.c
index cc1cb456ab8a..4b0cd46082a3 100644
--- a/drivers/platform/msm/ipa/ipa_v3/ipa_dp.c
+++ b/drivers/platform/msm/ipa/ipa_v3/ipa_dp.c
@@ -21,6 +21,7 @@
 #include "ipahal/ipahal.h"
 #include "ipahal/ipahal_fltrt.h"
 
+#define IPA_WAN_AGGR_PKT_CNT 5
 #define IPA_LAST_DESC_CNT 0xFFFF
 #define POLLING_INACTIVITY_RX 40
 #define POLLING_MIN_SLEEP_RX 1010
@@ -60,7 +61,6 @@
 #define IPA_ODU_RX_POOL_SZ 64
 #define IPA_SIZE_DL_CSUM_META_TRAILER 8
 
-#define IPA_GSI_EVT_RING_LEN 4096
 #define IPA_GSI_MAX_CH_LOW_WEIGHT 15
 #define IPA_GSI_EVT_RING_INT_MODT 3200 /* 0.1s under 32KHz clock */
 
@@ -3298,9 +3298,6 @@ static int ipa3_assign_policy(struct ipa_sys_connect_params *in,
 					sys->repl_hdlr =
 					   ipa3_replenish_rx_cache;
 				}
-				if (in->napi_enabled)
-					sys->rx_pool_sz =
-					   IPA_WAN_NAPI_CONS_RX_POOL_SZ;
 				if (in->napi_enabled && in->recycle_enabled)
 					sys->repl_hdlr =
 					 ipa3_replenish_rx_cache_recycle;
@@ -3965,13 +3962,19 @@ static int ipa_gsi_setup_channel(struct ipa_sys_connect_params *in,
 		gsi_evt_ring_props.re_size =
 			GSI_EVT_RING_RE_SIZE_16B;
 
-		gsi_evt_ring_props.ring_len = IPA_GSI_EVT_RING_LEN;
+		/*
+		* GSI ring length is calculated based on the desc_fifo_sz
+		* which was meant to define the BAM desc fifo. GSI descriptors
+		* are 16B as opposed to 8B for BAM.
+		*/
+		gsi_evt_ring_props.ring_len = 2 * in->desc_fifo_sz;
+
 		gsi_evt_ring_props.ring_base_vaddr =
-			dma_alloc_coherent(ipa3_ctx->pdev, IPA_GSI_EVT_RING_LEN,
-			&evt_dma_addr, GFP_KERNEL);
+			dma_alloc_coherent(ipa3_ctx->pdev,
+			gsi_evt_ring_props.ring_len, &evt_dma_addr, GFP_KERNEL);
 		if (!gsi_evt_ring_props.ring_base_vaddr) {
 			IPAERR("fail to dma alloc %u bytes\n",
-				IPA_GSI_EVT_RING_LEN);
+				gsi_evt_ring_props.ring_len);
 			return -ENOMEM;
 		}
 		gsi_evt_ring_props.ring_base_addr = evt_dma_addr;
@@ -4098,7 +4101,7 @@ fail_get_gsi_ep_info:
 	}
 fail_alloc_evt_ring:
 	if (gsi_evt_ring_props.ring_base_vaddr)
-		dma_free_coherent(ipa3_ctx->pdev, IPA_GSI_EVT_RING_LEN,
+		dma_free_coherent(ipa3_ctx->pdev, gsi_evt_ring_props.ring_len,
 			gsi_evt_ring_props.ring_base_vaddr, evt_dma_addr);
 	IPAERR("Return with err: %d\n", result);
 	return result;
@@ -4280,16 +4283,18 @@ int ipa3_rx_poll(u32 clnt_hdl, int weight)
 			break;
 
 		ipa3_wq_rx_common(ep->sys, mem_info.size);
-		cnt += 5;
+		cnt += IPA_WAN_AGGR_PKT_CNT;
 	};
 
-	if (cnt == 0) {
+	if (cnt == 0 || cnt < weight) {
 		ep->inactive_cycles++;
 		ep->client_notify(ep->priv, IPA_CLIENT_COMP_NAPI, 0);
 
 		if (ep->inactive_cycles > 3 || ep->sys->len == 0) {
 			ep->switch_to_intr = true;
 			delay = 0;
+		} else if (cnt < weight) {
+			delay = 0;
 		}
 		queue_delayed_work(ep->sys->wq,
 			&ep->sys->switch_to_intr_work, msecs_to_jiffies(delay));
diff --git a/drivers/platform/msm/ipa/ipa_v3/ipa_i.h b/drivers/platform/msm/ipa/ipa_v3/ipa_i.h
index 40f1e93653f9..1b78835cda6b 100644
--- a/drivers/platform/msm/ipa/ipa_v3/ipa_i.h
+++ b/drivers/platform/msm/ipa/ipa_v3/ipa_i.h
@@ -53,8 +53,6 @@
 #define IPA_UC_FINISH_MAX 6
 #define IPA_UC_WAIT_MIN_SLEEP 1000
 #define IPA_UC_WAII_MAX_SLEEP 1200
-#define IPA_WAN_NAPI_CONS_RX_POOL_SZ (IPA_GENERIC_RX_POOL_SZ*3)
-#define IPA_WAN_CONS_DESC_FIFO_SZ (IPA_SYS_DESC_FIFO_SZ*3)
 
 #define IPA_MAX_STATUS_STAT_NUM 30
 
diff --git a/drivers/platform/msm/ipa/ipa_v3/rmnet_ipa.c b/drivers/platform/msm/ipa/ipa_v3/rmnet_ipa.c
index 8f6c303d2867..0419249890e9 100644
--- a/drivers/platform/msm/ipa/ipa_v3/rmnet_ipa.c
+++ b/drivers/platform/msm/ipa/ipa_v3/rmnet_ipa.c
@@ -65,6 +65,7 @@
 	((rmnet_ipa3_ctx && rmnet_ipa3_ctx->wwan_priv) ? \
 	  rmnet_ipa3_ctx->wwan_priv->net : NULL)
 
+#define IPA_WWAN_CONS_DESC_FIFO_SZ 256
 
 static int ipa3_wwan_add_ul_flt_rule_to_ipa(void);
 static int ipa3_wwan_del_ul_flt_rule_to_ipa(void);
@@ -89,6 +90,7 @@ struct ipa3_rmnet_plat_drv_res {
 	bool ipa_loaduC;
 	bool ipa_advertise_sg_support;
 	bool ipa_napi_enable;
+	u32 wan_rx_desc_size;
 };
 
 /**
@@ -1275,7 +1277,7 @@ static int handle3_ingress_format(struct net_device *dev,
 			ipa_wan_ep_cfg->ipa_ep_cfg.aggr.aggr_pkt_limit =
 			   in->u.ingress_format.agg_count;
 
-			if (ipa_wan_ep_cfg->napi_enabled) {
+			if (ipa3_rmnet_res.ipa_napi_enable) {
 				ipa_wan_ep_cfg->recycle_enabled = true;
 				ep_cfg = (struct rmnet_phys_ep_conf_s *)
 				   rcu_dereference(dev->rx_handler_data);
@@ -1303,10 +1305,8 @@ static int handle3_ingress_format(struct net_device *dev,
 	ipa_wan_ep_cfg->priv = dev;
 
 	ipa_wan_ep_cfg->napi_enabled = ipa3_rmnet_res.ipa_napi_enable;
-	if (ipa_wan_ep_cfg->napi_enabled)
-		ipa_wan_ep_cfg->desc_fifo_sz = IPA_WAN_CONS_DESC_FIFO_SZ;
-	else
-		ipa_wan_ep_cfg->desc_fifo_sz = IPA_SYS_DESC_FIFO_SZ;
+	ipa_wan_ep_cfg->desc_fifo_sz =
+		ipa3_rmnet_res.wan_rx_desc_size * sizeof(struct sps_iovec);
 
 	mutex_lock(&rmnet_ipa3_ctx->ipa_to_apps_pipe_handle_guard);
 
@@ -1957,6 +1957,9 @@ static struct notifier_block ipa3_ssr_notifier = {
 static int get_ipa_rmnet_dts_configuration(struct platform_device *pdev,
 		struct ipa3_rmnet_plat_drv_res *ipa_rmnet_drv_res)
 {
+	int result;
+
+	ipa_rmnet_drv_res->wan_rx_desc_size = IPA_WWAN_CONS_DESC_FIFO_SZ;
 	ipa_rmnet_drv_res->ipa_rmnet_ssr =
 			of_property_read_bool(pdev->dev.of_node,
 			"qcom,rmnet-ipa-ssr");
@@ -1979,6 +1982,18 @@ static int get_ipa_rmnet_dts_configuration(struct platform_device *pdev,
 			"qcom,ipa-napi-enable");
 	pr_info("IPA Napi Enable = %s\n",
 		ipa_rmnet_drv_res->ipa_napi_enable ? "True" : "False");
+
+	/* Get IPA WAN RX desc fifo size */
+	result = of_property_read_u32(pdev->dev.of_node,
+			"qcom,wan-rx-desc-size",
+			&ipa_rmnet_drv_res->wan_rx_desc_size);
+	if (result)
+		pr_info("using default for wan-rx-desc-size = %u\n",
+				ipa_rmnet_drv_res->wan_rx_desc_size);
+	else
+		IPAWANDBG(": found ipa_drv_res->wan-rx-desc-size = %u\n",
+				ipa_rmnet_drv_res->wan_rx_desc_size);
+
 	return 0;
 }