qed: Add support for hardware offloaded FCoE.

This adds the backbone required for the various HW initalizations
which are necessary for the FCoE driver (qedf) for QLogic FastLinQ
4xxxx line of adapters - FW notification, resource initializations, etc.

Signed-off-by: Arun Easi <arun.easi@cavium.com>
Signed-off-by: Yuval Mintz <yuval.mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 202 insertions, 3 deletions

diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev.c b/drivers/net/ethernet/qlogic/qed/qed_dev.c
index 33e720143b8d..5ee7f040c50a 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dev.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dev.c
@@ -49,6 +49,7 @@
 #include "qed_cxt.h"
 #include "qed_dcbx.h"
 #include "qed_dev_api.h"
+#include "qed_fcoe.h"
 #include "qed_hsi.h"
 #include "qed_hw.h"
 #include "qed_init_ops.h"
@@ -172,6 +173,9 @@ void qed_resc_free(struct qed_dev *cdev)
 #ifdef CONFIG_QED_LL2
 		qed_ll2_free(p_hwfn, p_hwfn->p_ll2_info);
 #endif
+		if (p_hwfn->hw_info.personality == QED_PCI_FCOE)
+			qed_fcoe_free(p_hwfn, p_hwfn->p_fcoe_info);
+
 		if (p_hwfn->hw_info.personality == QED_PCI_ISCSI) {
 			qed_iscsi_free(p_hwfn, p_hwfn->p_iscsi_info);
 			qed_ooo_free(p_hwfn, p_hwfn->p_ooo_info);
@@ -433,6 +437,7 @@ int qed_qm_reconf(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 int qed_resc_alloc(struct qed_dev *cdev)
 {
 	struct qed_iscsi_info *p_iscsi_info;
+	struct qed_fcoe_info *p_fcoe_info;
 	struct qed_ooo_info *p_ooo_info;
 #ifdef CONFIG_QED_LL2
 	struct qed_ll2_info *p_ll2_info;
@@ -539,6 +544,14 @@ int qed_resc_alloc(struct qed_dev *cdev)
 			p_hwfn->p_ll2_info = p_ll2_info;
 		}
 #endif
+
+		if (p_hwfn->hw_info.personality == QED_PCI_FCOE) {
+			p_fcoe_info = qed_fcoe_alloc(p_hwfn);
+			if (!p_fcoe_info)
+				goto alloc_no_mem;
+			p_hwfn->p_fcoe_info = p_fcoe_info;
+		}
+
 		if (p_hwfn->hw_info.personality == QED_PCI_ISCSI) {
 			p_iscsi_info = qed_iscsi_alloc(p_hwfn);
 			if (!p_iscsi_info)
@@ -602,6 +615,9 @@ void qed_resc_setup(struct qed_dev *cdev)
 		if (p_hwfn->using_ll2)
 			qed_ll2_setup(p_hwfn, p_hwfn->p_ll2_info);
 #endif
+		if (p_hwfn->hw_info.personality == QED_PCI_FCOE)
+			qed_fcoe_setup(p_hwfn, p_hwfn->p_fcoe_info);
+
 		if (p_hwfn->hw_info.personality == QED_PCI_ISCSI) {
 			qed_iscsi_setup(p_hwfn, p_hwfn->p_iscsi_info);
 			qed_ooo_setup(p_hwfn, p_hwfn->p_ooo_info);
@@ -994,7 +1010,8 @@ static int qed_hw_init_pf(struct qed_hwfn *p_hwfn,
 	/* Protocl Configuration  */
 	STORE_RT_REG(p_hwfn, PRS_REG_SEARCH_TCP_RT_OFFSET,
 		     (p_hwfn->hw_info.personality == QED_PCI_ISCSI) ? 1 : 0);
-	STORE_RT_REG(p_hwfn, PRS_REG_SEARCH_FCOE_RT_OFFSET, 0);
+	STORE_RT_REG(p_hwfn, PRS_REG_SEARCH_FCOE_RT_OFFSET,
+		     (p_hwfn->hw_info.personality == QED_PCI_FCOE) ? 1 : 0);
 	STORE_RT_REG(p_hwfn, PRS_REG_SEARCH_ROCE_RT_OFFSET, 0);
 
 	/* Cleanup chip from previous driver if such remains exist */
@@ -1026,8 +1043,16 @@ static int qed_hw_init_pf(struct qed_hwfn *p_hwfn,
 		/* send function start command */
 		rc = qed_sp_pf_start(p_hwfn, p_tunn, p_hwfn->cdev->mf_mode,
 				     allow_npar_tx_switch);
-		if (rc)
+		if (rc) {
 			DP_NOTICE(p_hwfn, "Function start ramrod failed\n");
+			return rc;
+		}
+		if (p_hwfn->hw_info.personality == QED_PCI_FCOE) {
+			qed_wr(p_hwfn, p_ptt, PRS_REG_SEARCH_TAG1, BIT(2));
+			qed_wr(p_hwfn, p_ptt,
+			       PRS_REG_PKT_LEN_STAT_TAGS_NOT_COUNTED_FIRST,
+			       0x100);
+		}
 	}
 	return rc;
 }
@@ -1787,8 +1812,8 @@ static int qed_hw_get_resc(struct qed_hwfn *p_hwfn)
 
 static int qed_hw_get_nvm_info(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 {
-	u32 nvm_cfg1_offset, mf_mode, addr, generic_cont0, core_cfg;
 	u32 port_cfg_addr, link_temp, nvm_cfg_addr, device_capabilities;
+	u32 nvm_cfg1_offset, mf_mode, addr, generic_cont0, core_cfg;
 	struct qed_mcp_link_params *link;
 
 	/* Read global nvm_cfg address */
@@ -1934,6 +1959,9 @@ static int qed_hw_get_nvm_info(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 	if (device_capabilities & NVM_CFG1_GLOB_DEVICE_CAPABILITIES_ETHERNET)
 		__set_bit(QED_DEV_CAP_ETH,
 			  &p_hwfn->hw_info.device_capabilities);
+	if (device_capabilities & NVM_CFG1_GLOB_DEVICE_CAPABILITIES_FCOE)
+		__set_bit(QED_DEV_CAP_FCOE,
+			  &p_hwfn->hw_info.device_capabilities);
 	if (device_capabilities & NVM_CFG1_GLOB_DEVICE_CAPABILITIES_ISCSI)
 		__set_bit(QED_DEV_CAP_ISCSI,
 			  &p_hwfn->hw_info.device_capabilities);
@@ -2671,6 +2699,177 @@ void qed_llh_remove_mac_filter(struct qed_hwfn *p_hwfn,
 		DP_NOTICE(p_hwfn, "Tried to remove a non-configured filter\n");
 }
 
+int
+qed_llh_add_protocol_filter(struct qed_hwfn *p_hwfn,
+			    struct qed_ptt *p_ptt,
+			    u16 source_port_or_eth_type,
+			    u16 dest_port, enum qed_llh_port_filter_type_t type)
+{
+	u32 high = 0, low = 0, en;
+	int i;
+
+	if (!(IS_MF_SI(p_hwfn) || IS_MF_DEFAULT(p_hwfn)))
+		return 0;
+
+	switch (type) {
+	case QED_LLH_FILTER_ETHERTYPE:
+		high = source_port_or_eth_type;
+		break;
+	case QED_LLH_FILTER_TCP_SRC_PORT:
+	case QED_LLH_FILTER_UDP_SRC_PORT:
+		low = source_port_or_eth_type << 16;
+		break;
+	case QED_LLH_FILTER_TCP_DEST_PORT:
+	case QED_LLH_FILTER_UDP_DEST_PORT:
+		low = dest_port;
+		break;
+	case QED_LLH_FILTER_TCP_SRC_AND_DEST_PORT:
+	case QED_LLH_FILTER_UDP_SRC_AND_DEST_PORT:
+		low = (source_port_or_eth_type << 16) | dest_port;
+		break;
+	default:
+		DP_NOTICE(p_hwfn,
+			  "Non valid LLH protocol filter type %d\n", type);
+		return -EINVAL;
+	}
+	/* Find a free entry and utilize it */
+	for (i = 0; i < NIG_REG_LLH_FUNC_FILTER_EN_SIZE; i++) {
+		en = qed_rd(p_hwfn, p_ptt,
+			    NIG_REG_LLH_FUNC_FILTER_EN + i * sizeof(u32));
+		if (en)
+			continue;
+		qed_wr(p_hwfn, p_ptt,
+		       NIG_REG_LLH_FUNC_FILTER_VALUE +
+		       2 * i * sizeof(u32), low);
+		qed_wr(p_hwfn, p_ptt,
+		       NIG_REG_LLH_FUNC_FILTER_VALUE +
+		       (2 * i + 1) * sizeof(u32), high);
+		qed_wr(p_hwfn, p_ptt,
+		       NIG_REG_LLH_FUNC_FILTER_MODE + i * sizeof(u32), 1);
+		qed_wr(p_hwfn, p_ptt,
+		       NIG_REG_LLH_FUNC_FILTER_PROTOCOL_TYPE +
+		       i * sizeof(u32), 1 << type);
+		qed_wr(p_hwfn, p_ptt,
+		       NIG_REG_LLH_FUNC_FILTER_EN + i * sizeof(u32), 1);
+		break;
+	}
+	if (i >= NIG_REG_LLH_FUNC_FILTER_EN_SIZE) {
+		DP_NOTICE(p_hwfn,
+			  "Failed to find an empty LLH filter to utilize\n");
+		return -EINVAL;
+	}
+	switch (type) {
+	case QED_LLH_FILTER_ETHERTYPE:
+		DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
+			   "ETH type %x is added at %d\n",
+			   source_port_or_eth_type, i);
+		break;
+	case QED_LLH_FILTER_TCP_SRC_PORT:
+		DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
+			   "TCP src port %x is added at %d\n",
+			   source_port_or_eth_type, i);
+		break;
+	case QED_LLH_FILTER_UDP_SRC_PORT:
+		DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
+			   "UDP src port %x is added at %d\n",
+			   source_port_or_eth_type, i);
+		break;
+	case QED_LLH_FILTER_TCP_DEST_PORT:
+		DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
+			   "TCP dst port %x is added at %d\n", dest_port, i);
+		break;
+	case QED_LLH_FILTER_UDP_DEST_PORT:
+		DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
+			   "UDP dst port %x is added at %d\n", dest_port, i);
+		break;
+	case QED_LLH_FILTER_TCP_SRC_AND_DEST_PORT:
+		DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
+			   "TCP src/dst ports %x/%x are added at %d\n",
+			   source_port_or_eth_type, dest_port, i);
+		break;
+	case QED_LLH_FILTER_UDP_SRC_AND_DEST_PORT:
+		DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
+			   "UDP src/dst ports %x/%x are added at %d\n",
+			   source_port_or_eth_type, dest_port, i);
+		break;
+	}
+	return 0;
+}
+
+void
+qed_llh_remove_protocol_filter(struct qed_hwfn *p_hwfn,
+			       struct qed_ptt *p_ptt,
+			       u16 source_port_or_eth_type,
+			       u16 dest_port,
+			       enum qed_llh_port_filter_type_t type)
+{
+	u32 high = 0, low = 0;
+	int i;
+
+	if (!(IS_MF_SI(p_hwfn) || IS_MF_DEFAULT(p_hwfn)))
+		return;
+
+	switch (type) {
+	case QED_LLH_FILTER_ETHERTYPE:
+		high = source_port_or_eth_type;
+		break;
+	case QED_LLH_FILTER_TCP_SRC_PORT:
+	case QED_LLH_FILTER_UDP_SRC_PORT:
+		low = source_port_or_eth_type << 16;
+		break;
+	case QED_LLH_FILTER_TCP_DEST_PORT:
+	case QED_LLH_FILTER_UDP_DEST_PORT:
+		low = dest_port;
+		break;
+	case QED_LLH_FILTER_TCP_SRC_AND_DEST_PORT:
+	case QED_LLH_FILTER_UDP_SRC_AND_DEST_PORT:
+		low = (source_port_or_eth_type << 16) | dest_port;
+		break;
+	default:
+		DP_NOTICE(p_hwfn,
+			  "Non valid LLH protocol filter type %d\n", type);
+		return;
+	}
+
+	for (i = 0; i < NIG_REG_LLH_FUNC_FILTER_EN_SIZE; i++) {
+		if (!qed_rd(p_hwfn, p_ptt,
+			    NIG_REG_LLH_FUNC_FILTER_EN + i * sizeof(u32)))
+			continue;
+		if (!qed_rd(p_hwfn, p_ptt,
+			    NIG_REG_LLH_FUNC_FILTER_MODE + i * sizeof(u32)))
+			continue;
+		if (!(qed_rd(p_hwfn, p_ptt,
+			     NIG_REG_LLH_FUNC_FILTER_PROTOCOL_TYPE +
+			     i * sizeof(u32)) & BIT(type)))
+			continue;
+		if (qed_rd(p_hwfn, p_ptt,
+			   NIG_REG_LLH_FUNC_FILTER_VALUE +
+			   2 * i * sizeof(u32)) != low)
+			continue;
+		if (qed_rd(p_hwfn, p_ptt,
+			   NIG_REG_LLH_FUNC_FILTER_VALUE +
+			   (2 * i + 1) * sizeof(u32)) != high)
+			continue;
+
+		qed_wr(p_hwfn, p_ptt,
+		       NIG_REG_LLH_FUNC_FILTER_EN + i * sizeof(u32), 0);
+		qed_wr(p_hwfn, p_ptt,
+		       NIG_REG_LLH_FUNC_FILTER_MODE + i * sizeof(u32), 0);
+		qed_wr(p_hwfn, p_ptt,
+		       NIG_REG_LLH_FUNC_FILTER_PROTOCOL_TYPE +
+		       i * sizeof(u32), 0);
+		qed_wr(p_hwfn, p_ptt,
+		       NIG_REG_LLH_FUNC_FILTER_VALUE + 2 * i * sizeof(u32), 0);
+		qed_wr(p_hwfn, p_ptt,
+		       NIG_REG_LLH_FUNC_FILTER_VALUE +
+		       (2 * i + 1) * sizeof(u32), 0);
+		break;
+	}
+
+	if (i >= NIG_REG_LLH_FUNC_FILTER_EN_SIZE)
+		DP_NOTICE(p_hwfn, "Tried to remove a non-configured filter\n");
+}
+
 static int qed_set_coalesce(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
 			    u32 hw_addr, void *p_eth_qzone,
 			    size_t eth_qzone_size, u8 timeset)