igb: Add support for enabling VFs to PF driver.

This patch adds the support to handle requests from the VF to perform
operations such as completing resets, setting/reading mac address, adding
vlans, adding multicast addresses, setting rlpml, and general
communications between the PF and all VFs.

Signed-off-by: Alexander Duyck <[email protected]>
Signed-off-by: Jeff Kirsher <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

drivers/net/igb/Makefile

@@ -33,5 +33,5 @@
 obj-$(CONFIG_IGB) += igb.o
 
 igb-objs := igb_main.o igb_ethtool.o e1000_82575.o \
-	    e1000_mac.o e1000_nvm.o e1000_phy.o
+	    e1000_mac.o e1000_nvm.o e1000_phy.o e1000_mbx.o
 

drivers/net/igb/e1000_82575.c

@@ -213,6 +213,10 @@ static s32 igb_get_invariants_82575(struct e1000_hw *hw)
 		return -E1000_ERR_PHY;
 	}
 
+	/* if 82576 then initialize mailbox parameters */
+	if (mac->type == e1000_82576)
+		igb_init_mbx_params_pf(hw);
+
 	return 0;
 }
 
@@ -1413,6 +1417,44 @@ void igb_rx_fifo_flush_82575(struct e1000_hw *hw)
 	rd32(E1000_MPC);
 }
 
+/**
+ *  igb_vmdq_set_loopback_pf - enable or disable vmdq loopback
+ *  @hw: pointer to the hardware struct
+ *  @enable: state to enter, either enabled or disabled
+ *
+ *  enables/disables L2 switch loopback functionality.
+ **/
+void igb_vmdq_set_loopback_pf(struct e1000_hw *hw, bool enable)
+{
+	u32 dtxswc = rd32(E1000_DTXSWC);
+
+	if (enable)
+		dtxswc |= E1000_DTXSWC_VMDQ_LOOPBACK_EN;
+	else
+		dtxswc &= ~E1000_DTXSWC_VMDQ_LOOPBACK_EN;
+
+	wr32(E1000_DTXSWC, dtxswc);
+}
+
+/**
+ *  igb_vmdq_set_replication_pf - enable or disable vmdq replication
+ *  @hw: pointer to the hardware struct
+ *  @enable: state to enter, either enabled or disabled
+ *
+ *  enables/disables replication of packets across multiple pools.
+ **/
+void igb_vmdq_set_replication_pf(struct e1000_hw *hw, bool enable)
+{
+	u32 vt_ctl = rd32(E1000_VT_CTL);
+
+	if (enable)
+		vt_ctl |= E1000_VT_CTL_VM_REPL_EN;
+	else
+		vt_ctl &= ~E1000_VT_CTL_VM_REPL_EN;
+
+	wr32(E1000_VT_CTL, vt_ctl);
+}
+
 static struct e1000_mac_operations e1000_mac_ops_82575 = {
 	.reset_hw             = igb_reset_hw_82575,
 	.init_hw              = igb_init_hw_82575,

drivers/net/igb/e1000_82575.h

@@ -162,6 +162,10 @@ struct e1000_adv_tx_context_desc {
 #define E1000_DCA_TXCTRL_CPUID_SHIFT 24 /* Tx CPUID now in the last byte */
 #define E1000_DCA_RXCTRL_CPUID_SHIFT 24 /* Rx CPUID now in the last byte */
 
+#define MAX_NUM_VFS                   8
+
+#define E1000_DTXSWC_VMDQ_LOOPBACK_EN (1 << 31)  /* global VF LB enable */
+
 /* Easy defines for setting default pool, would normally be left a zero */
 #define E1000_VT_CTL_DEFAULT_POOL_SHIFT 7
 #define E1000_VT_CTL_DEFAULT_POOL_MASK  (0x7 << E1000_VT_CTL_DEFAULT_POOL_SHIFT)
@@ -181,8 +185,21 @@ struct e1000_adv_tx_context_desc {
 #define E1000_VMOLR_BAM        0x08000000 /* Accept Broadcast packets */
 #define E1000_VMOLR_MPME       0x10000000 /* Multicast promiscuous mode */
 #define E1000_VMOLR_STRVLAN    0x40000000 /* Vlan stripping enable */
+#define E1000_VMOLR_STRCRC     0x80000000 /* CRC stripping enable */
+
+#define E1000_VLVF_ARRAY_SIZE     32
+#define E1000_VLVF_VLANID_MASK    0x00000FFF
+#define E1000_VLVF_POOLSEL_SHIFT  12
+#define E1000_VLVF_POOLSEL_MASK   (0xFF << E1000_VLVF_POOLSEL_SHIFT)
+#define E1000_VLVF_LVLAN          0x00100000
+#define E1000_VLVF_VLANID_ENABLE  0x80000000
+
+#define E1000_IOVCTL 0x05BBC
+#define E1000_IOVCTL_REUSE_VFQ 0x00000001
 
 #define ALL_QUEUES   0xFFFF
 
+void igb_vmdq_set_loopback_pf(struct e1000_hw *, bool);
+void igb_vmdq_set_replication_pf(struct e1000_hw *, bool);
 
 #endif

drivers/net/igb/e1000_defines.h

@@ -45,6 +45,8 @@
 
 /* Extended Device Control */
 #define E1000_CTRL_EXT_SDP7_DATA 0x00000080 /* Value of SW Defineable Pin 7 */
+/* Physical Func Reset Done Indication */
+#define E1000_CTRL_EXT_PFRSTD    0x00004000
 #define E1000_CTRL_EXT_LINK_MODE_MASK 0x00C00000
 #define E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES  0x00C00000
 #define E1000_CTRL_EXT_LINK_MODE_SGMII   0x00800000
@@ -325,6 +327,7 @@
 #define E1000_ICR_RXSEQ         0x00000008 /* rx sequence error */
 #define E1000_ICR_RXDMT0        0x00000010 /* rx desc min. threshold (0) */
 #define E1000_ICR_RXT0          0x00000080 /* rx timer intr (ring 0) */
+#define E1000_ICR_VMMB          0x00000100 /* VM MB event */
 /* If this bit asserted, the driver should claim the interrupt */
 #define E1000_ICR_INT_ASSERTED  0x80000000
 /* LAN connected device generates an interrupt */
@@ -362,6 +365,7 @@
 /* Interrupt Mask Set */
 #define E1000_IMS_TXDW      E1000_ICR_TXDW      /* Transmit desc written back */
 #define E1000_IMS_LSC       E1000_ICR_LSC       /* Link Status Change */
+#define E1000_IMS_VMMB      E1000_ICR_VMMB      /* Mail box activity */
 #define E1000_IMS_RXSEQ     E1000_ICR_RXSEQ     /* rx sequence error */
 #define E1000_IMS_RXDMT0    E1000_ICR_RXDMT0    /* rx desc min. threshold */
 #define E1000_IMS_RXT0      E1000_ICR_RXT0      /* rx timer intr */
@@ -413,6 +417,7 @@
 #define E1000_BLK_PHY_RESET   12
 #define E1000_ERR_SWFW_SYNC 13
 #define E1000_NOT_IMPLEMENTED 14
+#define E1000_ERR_MBX      15
 
 /* Loop limit on how long we wait for auto-negotiation to complete */
 #define COPPER_LINK_UP_LIMIT              10
@@ -659,4 +664,8 @@
 #define E1000_GEN_CTL_ADDRESS_SHIFT     8
 #define E1000_GEN_POLL_TIMEOUT          640
 
+#define E1000_VFTA_ENTRY_SHIFT               5
+#define E1000_VFTA_ENTRY_MASK                0x7F
+#define E1000_VFTA_ENTRY_BIT_SHIFT_MASK      0x1F
+
 #endif

drivers/net/igb/e1000_hw.h

@@ -32,7 +32,6 @@
 #include <linux/delay.h>
 #include <linux/io.h>
 
-#include "e1000_mac.h"
 #include "e1000_regs.h"
 #include "e1000_defines.h"
 
@@ -272,6 +271,7 @@ struct e1000_host_mng_command_info {
 #include "e1000_mac.h"
 #include "e1000_phy.h"
 #include "e1000_nvm.h"
+#include "e1000_mbx.h"
 
 struct e1000_mac_operations {
 	s32  (*check_for_link)(struct e1000_hw *);
@@ -427,6 +427,34 @@ struct e1000_fc_info {
 	enum e1000_fc_type original_type;
 };
 
+struct e1000_mbx_operations {
+	s32 (*init_params)(struct e1000_hw *hw);
+	s32 (*read)(struct e1000_hw *, u32 *, u16,  u16);
+	s32 (*write)(struct e1000_hw *, u32 *, u16, u16);
+	s32 (*read_posted)(struct e1000_hw *, u32 *, u16,  u16);
+	s32 (*write_posted)(struct e1000_hw *, u32 *, u16, u16);
+	s32 (*check_for_msg)(struct e1000_hw *, u16);
+	s32 (*check_for_ack)(struct e1000_hw *, u16);
+	s32 (*check_for_rst)(struct e1000_hw *, u16);
+};
+
+struct e1000_mbx_stats {
+	u32 msgs_tx;
+	u32 msgs_rx;
+
+	u32 acks;
+	u32 reqs;
+	u32 rsts;
+};
+
+struct e1000_mbx_info {
+	struct e1000_mbx_operations ops;
+	struct e1000_mbx_stats stats;
+	u32 timeout;
+	u32 usec_delay;
+	u16 size;
+};
+
 struct e1000_dev_spec_82575 {
 	bool sgmii_active;
 };
@@ -443,6 +471,7 @@ struct e1000_hw {
 	struct e1000_phy_info  phy;
 	struct e1000_nvm_info  nvm;
 	struct e1000_bus_info  bus;
+	struct e1000_mbx_info mbx;
 	struct e1000_host_mng_dhcp_cookie mng_cookie;
 
 	union {

drivers/net/igb/e1000_mac.c

@@ -117,6 +117,30 @@ void igb_write_vfta(struct e1000_hw *hw, u32 offset, u32 value)
 	wrfl();
 }
 
+/**
+ *  igb_vfta_set - enable or disable vlan in VLAN filter table
+ *  @hw: pointer to the HW structure
+ *  @vid: VLAN id to add or remove
+ *  @add: if true add filter, if false remove
+ *
+ *  Sets or clears a bit in the VLAN filter table array based on VLAN id
+ *  and if we are adding or removing the filter
+ **/
+void igb_vfta_set(struct e1000_hw *hw, u32 vid, bool add)
+{
+	u32 index = (vid >> E1000_VFTA_ENTRY_SHIFT) & E1000_VFTA_ENTRY_MASK;
+	u32 mask = 1 < (vid & E1000_VFTA_ENTRY_BIT_SHIFT_MASK);
+	u32 vfta;
+
+	vfta = array_rd32(E1000_VFTA, index);
+	if (add)
+		vfta |= mask;
+	else
+		vfta &= ~mask;
+
+	igb_write_vfta(hw, index, vfta);
+}
+
 /**
  *  igb_check_alt_mac_addr - Check for alternate MAC addr
  *  @hw: pointer to the HW structure

drivers/net/igb/e1000_mac.h

@@ -58,6 +58,7 @@ s32  igb_write_8bit_ctrl_reg(struct e1000_hw *hw, u32 reg,
 
 void igb_clear_hw_cntrs_base(struct e1000_hw *hw);
 void igb_clear_vfta(struct e1000_hw *hw);
+void igb_vfta_set(struct e1000_hw *hw, u32 vid, bool add);
 void igb_config_collision_dist(struct e1000_hw *hw);
 void igb_mta_set(struct e1000_hw *hw, u32 hash_value);
 void igb_put_hw_semaphore(struct e1000_hw *hw);