qlcnic: Support SR-IOV enable and disable

o Add QLCNIC_SRIOV to Kconfig.
o Provide PCI sysfs hooks to enable and disable SR-IOV.
o Allow enabling only when CONFIG_QLCNIC_SRIOV is defined.
o qlcnic_sriov_pf.c has all the PF related SR-IOV
  functionality.
o qlcnic_sriov_common.c has VF functionality and SR-IOV
  functionality which is common between VF and PF.
o qlcnic_sriov.h is a common header file for SR-IOV defines.

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com>
Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/Kconfig

@@ -35,6 +35,16 @@ config QLCNIC
 	  This driver supports QLogic QLE8240 and QLE8242 Converged Ethernet
 	  devices.
 
+config QLCNIC_SRIOV
+	bool "QLOGIC QLCNIC 83XX family SR-IOV Support"
+	depends on QLCNIC && PCI_IOV
+	default y
+	---help---
+	  This configuration parameter enables Single Root Input Output
+	  Virtualization support for QLE83XX Converged Ethernet devices.
+	  This allows for virtual function acceleration in virtualized
+	  environments.
+
 config QLGE
 	tristate "QLogic QLGE 10Gb Ethernet Driver Support"
 	depends on PCI

drivers/net/ethernet/qlogic/qlcnic/Makefile

@@ -8,4 +8,6 @@ qlcnic-y := qlcnic_hw.o qlcnic_main.o qlcnic_init.o \
 	qlcnic_ethtool.o qlcnic_ctx.o qlcnic_io.o \
 	qlcnic_sysfs.o qlcnic_minidump.o qlcnic_83xx_hw.o \
 	qlcnic_83xx_init.o qlcnic_83xx_vnic.o \
-	qlcnic_minidump.o
+	qlcnic_minidump.o qlcnic_sriov_common.o
+
+qlcnic-$(CONFIG_QLCNIC_SRIOV) += qlcnic_sriov_pf.o

drivers/net/ethernet/qlogic/qlcnic/qlcnic.h

@@ -449,6 +449,7 @@ struct qlcnic_hardware_context {
 	struct qlc_83xx_idc idc;
 	struct qlc_83xx_fw_info fw_info;
 	struct qlcnic_intrpt_config *intr_tbl;
+	struct qlcnic_sriov *sriov;
 	u32 *reg_tbl;
 	u32 *ext_reg_tbl;
 	u32 mbox_aen[QLC_83XX_MBX_AEN_CNT];
@@ -914,7 +915,9 @@ struct qlcnic_ipaddr {
 #define __QLCNIC_AER			5
 #define __QLCNIC_DIAG_RES_ALLOC		6
 #define __QLCNIC_LED_ENABLE		7
-#define __QLCNIC_ELB_INPROGRESS	8
+#define __QLCNIC_ELB_INPROGRESS		8
+#define __QLCNIC_SRIOV_ENABLE		10
+#define __QLCNIC_SRIOV_CAPABLE		11
 
 #define QLCNIC_INTERRUPT_TEST		1
 #define QLCNIC_LOOPBACK_TEST		2
@@ -1051,7 +1054,11 @@ struct qlcnic_info_le {
 	u8      total_pf;
 	u8      total_rss_engines;
 	__le16  max_vports;
-	u8      reserved2[64];
+	__le16	linkstate_reg_offset;
+	__le16	bit_offsets;
+	__le16  max_local_ipv6_addrs;
+	__le16  max_remote_ipv6_addrs;
+	u8	reserved2[56];
 } __packed;
 
 struct qlcnic_info {
@@ -1083,6 +1090,10 @@ struct qlcnic_info {
 	u8      total_pf;
 	u8      total_rss_engines;
 	u16	max_vports;
+	u16	linkstate_reg_offset;
+	u16	bit_offsets;
+	u16	max_local_ipv6_addrs;
+	u16	max_remote_ipv6_addrs;
 };
 
 struct qlcnic_pci_info_le {
@@ -1511,6 +1522,7 @@ int qlcnic_reset_npar_config(struct qlcnic_adapter *);
 int qlcnic_set_eswitch_port_config(struct qlcnic_adapter *);
 void qlcnic_add_lb_filter(struct qlcnic_adapter *, struct sk_buff *, int,
 			  __le16);
+int qlcnic_83xx_configure_opmode(struct qlcnic_adapter *adapter);
 /*
  * QLOGIC Board information
  */
@@ -1843,5 +1855,9 @@ static inline bool qlcnic_83xx_check(struct qlcnic_adapter *adapter)
 	return (device == PCI_DEVICE_ID_QLOGIC_QLE834X) ? true : false;
 }
 
+static inline bool qlcnic_sriov_pf_check(struct qlcnic_adapter *adapter)
+{
+	return (adapter->ahw->op_mode == QLCNIC_SRIOV_PF_FUNC) ? true : false;
+}
 
 #endif				/* __QLCNIC_H_ */

drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c

@@ -209,6 +209,7 @@ static const struct qlcnic_mailbox_metadata qlcnic_83xx_mbx_tbl[] = {
 	{QLCNIC_CMD_SET_LED_CONFIG, 5, 1},
 	{QLCNIC_CMD_GET_LED_CONFIG, 1, 5},
 	{QLCNIC_CMD_ADD_RCV_RINGS, 130, 26},
+	{QLCNIC_CMD_CONFIG_VPORT, 4, 4},
 };
 
 static const u32 qlcnic_83xx_ext_reg_tbl[] = {
@@ -775,6 +776,9 @@ void qlcnic_83xx_check_vf(struct qlcnic_adapter *adapter,
 			 ahw->fw_hal_version);
 		adapter->nic_ops = &qlcnic_vf_ops;
 	} else {
+		if (pci_find_ext_capability(adapter->pdev,
+					    PCI_EXT_CAP_ID_SRIOV))
+			set_bit(__QLCNIC_SRIOV_CAPABLE, &adapter->state);
 		adapter->nic_ops = &qlcnic_83xx_ops;
 	}
 }

drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.h

@@ -243,6 +243,7 @@ struct qlc_83xx_idc {
 #define QLC_83XX_GET_FW_LRO_MSS_CAPABILITY(val)	(val & 0x20000)
 #define QLC_83XX_VIRTUAL_NIC_MODE			0xFF
 #define QLC_83XX_DEFAULT_MODE				0x0
+#define QLC_83XX_SRIOV_MODE				0x1
 #define QLCNIC_BRDTYPE_83XX_10G			0x0083
 
 #define QLC_83XX_FLASH_SPI_STATUS		0x2808E010

drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c

@@ -25,7 +25,6 @@
 #define QLC_83XX_OPCODE_POLL_READ_LIST		0x0100
 
 static int qlcnic_83xx_init_default_driver(struct qlcnic_adapter *adapter);
-static int qlcnic_83xx_configure_opmode(struct qlcnic_adapter *adapter);
 static int qlcnic_83xx_check_heartbeat(struct qlcnic_adapter *p_dev);
 static int qlcnic_83xx_restart_hw(struct qlcnic_adapter *adapter);
 
@@ -1918,6 +1917,9 @@ int qlcnic_83xx_config_default_opmode(struct qlcnic_adapter *adapter)
 	qlcnic_get_func_no(adapter);
 	op_mode = QLCRDX(ahw, QLC_83XX_DRV_OP_MODE);
 
+	if (test_bit(__QLCNIC_SRIOV_CAPABLE, &adapter->state))
+		op_mode = QLC_83XX_DEFAULT_OPMODE;
+
 	if (op_mode == QLC_83XX_DEFAULT_OPMODE) {
 		adapter->nic_ops->init_driver = qlcnic_83xx_init_default_driver;
 		ahw->idc.state_entry = qlcnic_83xx_idc_ready_state_entry;
@@ -1947,6 +1949,16 @@ int qlcnic_83xx_get_nic_configuration(struct qlcnic_adapter *adapter)
 	ahw->max_mac_filters = nic_info.max_mac_filters;
 	ahw->max_mtu = nic_info.max_mtu;
 
+	/* VNIC mode is detected by BIT_23 in capabilities. This bit is also
+	 * set in case device is SRIOV capable. VNIC and SRIOV are mutually
+	 * exclusive. So in case of sriov capable device load driver in
+	 * default mode
+	 */
+	if (test_bit(__QLCNIC_SRIOV_CAPABLE, &adapter->state)) {
+		ahw->nic_mode = QLC_83XX_DEFAULT_MODE;
+		return ahw->nic_mode;
+	}
+
 	if (ahw->capabilities & BIT_23)
 		ahw->nic_mode = QLC_83XX_VIRTUAL_NIC_MODE;
 	else
@@ -1955,7 +1967,7 @@ int qlcnic_83xx_get_nic_configuration(struct qlcnic_adapter *adapter)
 	return ahw->nic_mode;
 }
 
-static int qlcnic_83xx_configure_opmode(struct qlcnic_adapter *adapter)
+int qlcnic_83xx_configure_opmode(struct qlcnic_adapter *adapter)
 {
 	int ret;
 

drivers/net/ethernet/qlogic/qlcnic/qlcnic_hdr.h

@@ -714,7 +714,8 @@ enum {
 	QLCNIC_MGMT_FUNC	= 0,
 	QLCNIC_PRIV_FUNC	= 1,
 	QLCNIC_NON_PRIV_FUNC	= 2,
-	QLCNIC_UNKNOWN_FUNC_MODE = 3
+	QLCNIC_SRIOV_PF_FUNC	= 3,
+	QLCNIC_UNKNOWN_FUNC_MODE = 4
 };
 
 enum {

drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.h

@@ -83,6 +83,7 @@ enum qlcnic_regs {
 #define QLCNIC_CMD_CONFIG_PORT			0x2e
 #define QLCNIC_CMD_TEMP_SIZE			0x2f
 #define QLCNIC_CMD_GET_TEMP_HDR			0x30
+#define	QLCNIC_CMD_CONFIG_VPORT			0x32
 #define QLCNIC_CMD_GET_MAC_STATS		0x37
 #define QLCNIC_CMD_SET_DRV_VER			0x38
 #define QLCNIC_CMD_CONFIGURE_RSS		0x41

drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c

@@ -9,6 +9,7 @@
 #include <linux/interrupt.h>
 
 #include "qlcnic.h"
+#include "qlcnic_sriov.h"
 #include "qlcnic_hw.h"
 
 #include <linux/swab.h>
@@ -2022,11 +2023,13 @@ static void qlcnic_remove(struct pci_dev *pdev)
 		return;
 
 	netdev = adapter->netdev;
+	qlcnic_sriov_pf_disable(adapter);
 
 	qlcnic_cancel_idc_work(adapter);
 	ahw = adapter->ahw;
 
 	unregister_netdev(netdev);
+	qlcnic_sriov_cleanup(adapter);
 
 	if (qlcnic_83xx_check(adapter)) {
 		qlcnic_83xx_free_mbx_intr(adapter);
@@ -3430,7 +3433,10 @@ static struct pci_driver qlcnic_driver = {
 	.resume = qlcnic_resume,
 #endif
 	.shutdown = qlcnic_shutdown,
-	.err_handler = &qlcnic_err_handler
+	.err_handler = &qlcnic_err_handler,
+#ifdef CONFIG_QLCNIC_SRIOV
+	.sriov_configure = qlcnic_pci_sriov_configure,
+#endif
 
 };
 

drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov.h

@@ -0,0 +1,58 @@
+/*
+ * QLogic qlcnic NIC Driver
+ * Copyright (c) 2009-2013 QLogic Corporation
+ *
+ * See LICENSE.qlcnic for copyright and licensing details.
+ */
+
+#ifndef _QLCNIC_83XX_SRIOV_H_
+#define _QLCNIC_83XX_SRIOV_H_
+
+#include "qlcnic.h"
+#include <linux/types.h>
+#include <linux/pci.h>
+
+struct qlcnic_resources {
+	u16 num_tx_mac_filters;
+	u16 num_rx_ucast_mac_filters;
+	u16 num_rx_mcast_mac_filters;
+
+	u16 num_txvlan_keys;
+
+	u16 num_rx_queues;
+	u16 num_tx_queues;
+
+	u16 num_rx_buf_rings;
+	u16 num_rx_status_rings;
+
+	u16 num_destip;
+	u32 num_lro_flows_supported;
+	u16 max_local_ipv6_addrs;
+	u16 max_remote_ipv6_addrs;
+};
+
+struct qlcnic_sriov {
+	u16				vp_handle;
+	u8				num_vfs;
+	struct qlcnic_resources		ff_max;
+};
+
+int qlcnic_sriov_init(struct qlcnic_adapter *, int);
+void qlcnic_sriov_cleanup(struct qlcnic_adapter *);
+void __qlcnic_sriov_cleanup(struct qlcnic_adapter *);
+
+static inline bool qlcnic_sriov_enable_check(struct qlcnic_adapter *adapter)
+{
+	return test_bit(__QLCNIC_SRIOV_ENABLE, &adapter->state) ? true : false;
+}
+
+#ifdef CONFIG_QLCNIC_SRIOV
+void qlcnic_sriov_pf_disable(struct qlcnic_adapter *);
+void qlcnic_sriov_pf_cleanup(struct qlcnic_adapter *);
+int qlcnic_pci_sriov_configure(struct pci_dev *, int);
+#else
+static inline void qlcnic_sriov_pf_disable(struct qlcnic_adapter *adapter) {}
+static inline void qlcnic_sriov_pf_cleanup(struct qlcnic_adapter *adapter) {}
+#endif
+
+#endif

drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c

@@ -0,0 +1,40 @@
+/*
+ * QLogic qlcnic NIC Driver
+ * Copyright (c) 2009-2013 QLogic Corporation
+ *
+ * See LICENSE.qlcnic for copyright and licensing details.
+ */
+
+#include "qlcnic_sriov.h"
+#include "qlcnic.h"
+#include <linux/types.h>
+
+int qlcnic_sriov_init(struct qlcnic_adapter *adapter, int num_vfs)
+{
+	struct qlcnic_sriov *sriov;
+
+	if (!qlcnic_sriov_enable_check(adapter))
+		return -EIO;
+
+	sriov  = kzalloc(sizeof(struct qlcnic_sriov), GFP_KERNEL);
+	if (!sriov)
+		return -ENOMEM;
+
+	adapter->ahw->sriov = sriov;
+	sriov->num_vfs = num_vfs;
+	return 0;
+}
+
+void __qlcnic_sriov_cleanup(struct qlcnic_adapter *adapter)
+{
+	if (!qlcnic_sriov_enable_check(adapter))
+		return;
+
+	kfree(adapter->ahw->sriov);
+}
+
+void qlcnic_sriov_cleanup(struct qlcnic_adapter *adapter)
+{
+	if (qlcnic_sriov_pf_check(adapter))
+		qlcnic_sriov_pf_cleanup(adapter);
+}