liquidio: remove obsolete functions and data structures

1. Remove unused functions and data structures.
2. Change the sending of the remaining soft commands to synchronous.

Signed-off-by: Weilin Chang <weilin.chang@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 67 insertions, 168 deletions

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c b/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c
index d374c44dfcac..46d8379d8c7c 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c
@@ -33,25 +33,12 @@
 
 static int lio_reset_queues(struct net_device *netdev, uint32_t num_qs);
 
-struct oct_intrmod_context {
-	int octeon_id;
-	wait_queue_head_t wc;
-	int cond;
-	int status;
-};
-
 struct oct_intrmod_resp {
 	u64     rh;
 	struct oct_intrmod_cfg intrmod;
 	u64     status;
 };
 
-struct oct_mdio_cmd_context {
-	int octeon_id;
-	wait_queue_head_t wc;
-	int cond;
-};
-
 struct oct_mdio_cmd_resp {
 	u64 rh;
 	struct oct_mdio_cmd resp;
@@ -746,28 +733,6 @@ static int octnet_id_active(struct net_device *netdev, int val)
 	return 0;
 }
 
-/* Callback for when mdio command response arrives
- */
-static void octnet_mdio_resp_callback(struct octeon_device *oct,
-				      u32 status,
-				      void *buf)
-{
-	struct oct_mdio_cmd_context *mdio_cmd_ctx;
-	struct octeon_soft_command *sc = (struct octeon_soft_command *)buf;
-
-	mdio_cmd_ctx = (struct oct_mdio_cmd_context *)sc->ctxptr;
-
-	oct = lio_get_device(mdio_cmd_ctx->octeon_id);
-	if (status) {
-		dev_err(&oct->pci_dev->dev, "MIDO instruction failed. Status: %llx\n",
-			CVM_CAST64(status));
-		WRITE_ONCE(mdio_cmd_ctx->cond, -1);
-	} else {
-		WRITE_ONCE(mdio_cmd_ctx->cond, 1);
-	}
-	wake_up_interruptible(&mdio_cmd_ctx->wc);
-}
-
 /* This routine provides PHY access routines for
  * mdio  clause45 .
  */
@@ -777,25 +742,20 @@ octnet_mdio45_access(struct lio *lio, int op, int loc, int *value)
 	struct octeon_device *oct_dev = lio->oct_dev;
 	struct octeon_soft_command *sc;
 	struct oct_mdio_cmd_resp *mdio_cmd_rsp;
-	struct oct_mdio_cmd_context *mdio_cmd_ctx;
 	struct oct_mdio_cmd *mdio_cmd;
 	int retval = 0;
 
 	sc = (struct octeon_soft_command *)
 		octeon_alloc_soft_command(oct_dev,
 					  sizeof(struct oct_mdio_cmd),
-					  sizeof(struct oct_mdio_cmd_resp),
-					  sizeof(struct oct_mdio_cmd_context));
+					  sizeof(struct oct_mdio_cmd_resp), 0);
 
 	if (!sc)
 		return -ENOMEM;
 
-	mdio_cmd_ctx = (struct oct_mdio_cmd_context *)sc->ctxptr;
 	mdio_cmd_rsp = (struct oct_mdio_cmd_resp *)sc->virtrptr;
 	mdio_cmd = (struct oct_mdio_cmd *)sc->virtdptr;
 
-	WRITE_ONCE(mdio_cmd_ctx->cond, 0);
-	mdio_cmd_ctx->octeon_id = lio_get_device_id(oct_dev);
 	mdio_cmd->op = op;
 	mdio_cmd->mdio_addr = loc;
 	if (op)
@@ -807,42 +767,40 @@ octnet_mdio45_access(struct lio *lio, int op, int loc, int *value)
 	octeon_prepare_soft_command(oct_dev, sc, OPCODE_NIC, OPCODE_NIC_MDIO45,
 				    0, 0, 0);
 
-	sc->wait_time = 1000;
-	sc->callback = octnet_mdio_resp_callback;
-	sc->callback_arg = sc;
-
-	init_waitqueue_head(&mdio_cmd_ctx->wc);
+	init_completion(&sc->complete);
+	sc->sc_status = OCTEON_REQUEST_PENDING;
 
 	retval = octeon_send_soft_command(oct_dev, sc);
-
 	if (retval == IQ_SEND_FAILED) {
 		dev_err(&oct_dev->pci_dev->dev,
 			"octnet_mdio45_access instruction failed status: %x\n",
 			retval);
-		retval = -EBUSY;
+		octeon_free_soft_command(oct_dev, sc);
+		return -EBUSY;
 	} else {
 		/* Sleep on a wait queue till the cond flag indicates that the
 		 * response arrived
 		 */
-		sleep_cond(&mdio_cmd_ctx->wc, &mdio_cmd_ctx->cond);
+		retval = wait_for_sc_completion_timeout(oct_dev, sc, 0);
+		if (retval)
+			return retval;
+
 		retval = mdio_cmd_rsp->status;
 		if (retval) {
-			dev_err(&oct_dev->pci_dev->dev, "octnet mdio45 access failed\n");
-			retval = -EBUSY;
-		} else {
-			octeon_swap_8B_data((u64 *)(&mdio_cmd_rsp->resp),
-					    sizeof(struct oct_mdio_cmd) / 8);
-
-			if (READ_ONCE(mdio_cmd_ctx->cond) == 1) {
-				if (!op)
-					*value = mdio_cmd_rsp->resp.value1;
-			} else {
-				retval = -EINVAL;
-			}
+			dev_err(&oct_dev->pci_dev->dev,
+				"octnet mdio45 access failed: %x\n", retval);
+			WRITE_ONCE(sc->caller_is_done, true);
+			return -EBUSY;
 		}
-	}
 
-	octeon_free_soft_command(oct_dev, sc);
+		octeon_swap_8B_data((u64 *)(&mdio_cmd_rsp->resp),
+				    sizeof(struct oct_mdio_cmd) / 8);
+
+		if (!op)
+			*value = mdio_cmd_rsp->resp.value1;
+
+		WRITE_ONCE(sc->caller_is_done, true);
+	}
 
 	return retval;
 }
@@ -1006,8 +964,7 @@ lio_ethtool_get_ringparam(struct net_device *netdev,
 static int lio_23xx_reconfigure_queue_count(struct lio *lio)
 {
 	struct octeon_device *oct = lio->oct_dev;
-	struct liquidio_if_cfg_context *ctx;
-	u32 resp_size, ctx_size, data_size;
+	u32 resp_size, data_size;
 	struct liquidio_if_cfg_resp *resp;
 	struct octeon_soft_command *sc;
 	union oct_nic_if_cfg if_cfg;
@@ -1017,11 +974,10 @@ static int lio_23xx_reconfigure_queue_count(struct lio *lio)
 	int j;
 
 	resp_size = sizeof(struct liquidio_if_cfg_resp);
-	ctx_size = sizeof(struct liquidio_if_cfg_context);
 	data_size = sizeof(struct lio_version);
 	sc = (struct octeon_soft_command *)
 		octeon_alloc_soft_command(oct, data_size,
-					  resp_size, ctx_size);
+					  resp_size, 0);
 	if (!sc) {
 		dev_err(&oct->pci_dev->dev, "%s: Failed to allocate soft command\n",
 			__func__);
@@ -1029,7 +985,6 @@ static int lio_23xx_reconfigure_queue_count(struct lio *lio)
 	}
 
 	resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
-	ctx  = (struct liquidio_if_cfg_context *)sc->ctxptr;
 	vdata = (struct lio_version *)sc->virtdptr;
 
 	vdata->major = (__force u16)cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
@@ -1037,9 +992,6 @@ static int lio_23xx_reconfigure_queue_count(struct lio *lio)
 	vdata->micro = (__force u16)cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);
 
 	ifidx_or_pfnum = oct->pf_num;
-	WRITE_ONCE(ctx->cond, 0);
-	ctx->octeon_id = lio_get_device_id(oct);
-	init_waitqueue_head(&ctx->wc);
 
 	if_cfg.u64 = 0;
 	if_cfg.s.num_iqueues = oct->sriov_info.num_pf_rings;
@@ -1051,27 +1003,29 @@ static int lio_23xx_reconfigure_queue_count(struct lio *lio)
 	octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
 				    OPCODE_NIC_QCOUNT_UPDATE, 0,
 				    if_cfg.u64, 0);
-	sc->callback = lio_if_cfg_callback;
-	sc->callback_arg = sc;
-	sc->wait_time = LIO_IFCFG_WAIT_TIME;
+
+	init_completion(&sc->complete);
+	sc->sc_status = OCTEON_REQUEST_PENDING;
 
 	retval = octeon_send_soft_command(oct, sc);
 	if (retval == IQ_SEND_FAILED) {
 		dev_err(&oct->pci_dev->dev,
-			"iq/oq config failed status: %x\n",
+			"Sending iq/oq config failed status: %x\n",
 			retval);
-		goto qcount_update_fail;
+		octeon_free_soft_command(oct, sc);
+		return -EIO;
 	}
 
-	if (sleep_cond(&ctx->wc, &ctx->cond) == -EINTR) {
-		dev_err(&oct->pci_dev->dev, "Wait interrupted\n");
-		return -1;
-	}
+	retval = wait_for_sc_completion_timeout(oct, sc, 0);
+	if (retval)
+		return retval;
 
 	retval = resp->status;
 	if (retval) {
-		dev_err(&oct->pci_dev->dev, "iq/oq config failed\n");
-		goto qcount_update_fail;
+		dev_err(&oct->pci_dev->dev,
+			"iq/oq config failed: %x\n", retval);
+		WRITE_ONCE(sc->caller_is_done, true);
+		return -1;
 	}
 
 	octeon_swap_8B_data((u64 *)(&resp->cfg_info),
@@ -1096,16 +1050,12 @@ static int lio_23xx_reconfigure_queue_count(struct lio *lio)
 	lio->txq = lio->linfo.txpciq[0].s.q_no;
 	lio->rxq = lio->linfo.rxpciq[0].s.q_no;
 
-	octeon_free_soft_command(oct, sc);
 	dev_info(&oct->pci_dev->dev, "Queue count updated to %d\n",
 		 lio->linfo.num_rxpciq);
 
-	return 0;
-
-qcount_update_fail:
-	octeon_free_soft_command(oct, sc);
+	WRITE_ONCE(sc->caller_is_done, true);
 
-	return -1;
+	return 0;
 }
 
 static int lio_reset_queues(struct net_device *netdev, uint32_t num_qs)
@@ -2012,34 +1962,11 @@ static int lio_vf_get_sset_count(struct net_device *netdev, int sset)
 	}
 }
 
-/* Callback function for intrmod */
-static void octnet_intrmod_callback(struct octeon_device *oct_dev,
-				    u32 status,
-				    void *ptr)
-{
-	struct octeon_soft_command *sc = (struct octeon_soft_command *)ptr;
-	struct oct_intrmod_context *ctx;
-
-	ctx  = (struct oct_intrmod_context *)sc->ctxptr;
-
-	ctx->status = status;
-
-	WRITE_ONCE(ctx->cond, 1);
-
-	/* This barrier is required to be sure that the response has been
-	 * written fully before waking up the handler
-	 */
-	wmb();
-
-	wake_up_interruptible(&ctx->wc);
-}
-
 /*  get interrupt moderation parameters */
 static int octnet_get_intrmod_cfg(struct lio *lio,
 				  struct oct_intrmod_cfg *intr_cfg)
 {
 	struct octeon_soft_command *sc;
-	struct oct_intrmod_context *ctx;
 	struct oct_intrmod_resp *resp;
 	int retval;
 	struct octeon_device *oct_dev = lio->oct_dev;
@@ -2048,8 +1975,7 @@ static int octnet_get_intrmod_cfg(struct lio *lio,
 	sc = (struct octeon_soft_command *)
 		octeon_alloc_soft_command(oct_dev,
 					  0,
-					  sizeof(struct oct_intrmod_resp),
-					  sizeof(struct oct_intrmod_context));
+					  sizeof(struct oct_intrmod_resp), 0);
 
 	if (!sc)
 		return -ENOMEM;
@@ -2057,20 +1983,13 @@ static int octnet_get_intrmod_cfg(struct lio *lio,
 	resp = (struct oct_intrmod_resp *)sc->virtrptr;
 	memset(resp, 0, sizeof(struct oct_intrmod_resp));
 
-	ctx = (struct oct_intrmod_context *)sc->ctxptr;
-	memset(ctx, 0, sizeof(struct oct_intrmod_context));
-	WRITE_ONCE(ctx->cond, 0);
-	ctx->octeon_id = lio_get_device_id(oct_dev);
-	init_waitqueue_head(&ctx->wc);
-
 	sc->iq_no = lio->linfo.txpciq[0].s.q_no;
 
 	octeon_prepare_soft_command(oct_dev, sc, OPCODE_NIC,
 				    OPCODE_NIC_INTRMOD_PARAMS, 0, 0, 0);
 
-	sc->callback = octnet_intrmod_callback;
-	sc->callback_arg = sc;
-	sc->wait_time = 1000;
+	init_completion(&sc->complete);
+	sc->sc_status = OCTEON_REQUEST_PENDING;
 
 	retval = octeon_send_soft_command(oct_dev, sc);
 	if (retval == IQ_SEND_FAILED) {
@@ -2081,32 +2000,23 @@ static int octnet_get_intrmod_cfg(struct lio *lio,
 	/* Sleep on a wait queue till the cond flag indicates that the
 	 * response arrived or timed-out.
 	 */
-	if (sleep_cond(&ctx->wc, &ctx->cond) == -EINTR) {
-		dev_err(&oct_dev->pci_dev->dev, "Wait interrupted\n");
-		goto intrmod_info_wait_intr;
-	}
+	retval = wait_for_sc_completion_timeout(oct_dev, sc, 0);
+	if (retval)
+		return -ENODEV;
 
-	retval = ctx->status || resp->status;
-	if (retval) {
+	if (resp->status) {
 		dev_err(&oct_dev->pci_dev->dev,
 			"Get interrupt moderation parameters failed\n");
-		goto intrmod_info_wait_fail;
+		WRITE_ONCE(sc->caller_is_done, true);
+		return -ENODEV;
 	}
 
 	octeon_swap_8B_data((u64 *)&resp->intrmod,
 			    (sizeof(struct oct_intrmod_cfg)) / 8);
 	memcpy(intr_cfg, &resp->intrmod, sizeof(struct oct_intrmod_cfg));
-	octeon_free_soft_command(oct_dev, sc);
+	WRITE_ONCE(sc->caller_is_done, true);
 
 	return 0;
-
-intrmod_info_wait_fail:
-
-	octeon_free_soft_command(oct_dev, sc);
-
-intrmod_info_wait_intr:
-
-	return -ENODEV;
 }
 
 /*  Configure interrupt moderation parameters */
@@ -2114,7 +2024,6 @@ static int octnet_set_intrmod_cfg(struct lio *lio,
 				  struct oct_intrmod_cfg *intr_cfg)
 {
 	struct octeon_soft_command *sc;
-	struct oct_intrmod_context *ctx;
 	struct oct_intrmod_cfg *cfg;
 	int retval;
 	struct octeon_device *oct_dev = lio->oct_dev;
@@ -2123,18 +2032,11 @@ static int octnet_set_intrmod_cfg(struct lio *lio,
 	sc = (struct octeon_soft_command *)
 		octeon_alloc_soft_command(oct_dev,
 					  sizeof(struct oct_intrmod_cfg),
-					  0,
-					  sizeof(struct oct_intrmod_context));
+					  16, 0);
 
 	if (!sc)
 		return -ENOMEM;
 
-	ctx = (struct oct_intrmod_context *)sc->ctxptr;
-
-	WRITE_ONCE(ctx->cond, 0);
-	ctx->octeon_id = lio_get_device_id(oct_dev);
-	init_waitqueue_head(&ctx->wc);
-
 	cfg = (struct oct_intrmod_cfg *)sc->virtdptr;
 
 	memcpy(cfg, intr_cfg, sizeof(struct oct_intrmod_cfg));
@@ -2145,9 +2047,8 @@ static int octnet_set_intrmod_cfg(struct lio *lio,
 	octeon_prepare_soft_command(oct_dev, sc, OPCODE_NIC,
 				    OPCODE_NIC_INTRMOD_CFG, 0, 0, 0);
 
-	sc->callback = octnet_intrmod_callback;
-	sc->callback_arg = sc;
-	sc->wait_time = 1000;
+	init_completion(&sc->complete);
+	sc->sc_status = OCTEON_REQUEST_PENDING;
 
 	retval = octeon_send_soft_command(oct_dev, sc);
 	if (retval == IQ_SEND_FAILED) {
@@ -2158,26 +2059,24 @@ static int octnet_set_intrmod_cfg(struct lio *lio,
 	/* Sleep on a wait queue till the cond flag indicates that the
 	 * response arrived or timed-out.
 	 */
-	if (sleep_cond(&ctx->wc, &ctx->cond) != -EINTR) {
-		retval = ctx->status;
-		if (retval)
-			dev_err(&oct_dev->pci_dev->dev,
-				"intrmod config failed. Status: %llx\n",
-				CVM_CAST64(retval));
-		else
-			dev_info(&oct_dev->pci_dev->dev,
-				 "Rx-Adaptive Interrupt moderation %s\n",
-				 (intr_cfg->rx_enable) ?
-				 "enabled" : "disabled");
-
-		octeon_free_soft_command(oct_dev, sc);
-
-		return ((retval) ? -ENODEV : 0);
+	retval = wait_for_sc_completion_timeout(oct_dev, sc, 0);
+	if (retval)
+		return retval;
+
+	retval = sc->sc_status;
+	if (retval == 0) {
+		dev_info(&oct_dev->pci_dev->dev,
+			 "Rx-Adaptive Interrupt moderation %s\n",
+			 (intr_cfg->rx_enable) ?
+			 "enabled" : "disabled");
+		WRITE_ONCE(sc->caller_is_done, true);
+		return 0;
 	}
 
-	dev_err(&oct_dev->pci_dev->dev, "iq/oq config failed\n");
-
-	return -EINTR;
+	dev_err(&oct_dev->pci_dev->dev,
+		"intrmod config failed. Status: %x\n", retval);
+	WRITE_ONCE(sc->caller_is_done, true);
+	return -ENODEV;
 }
 
 static int lio_get_intr_coalesce(struct net_device *netdev,