bnx2x: Support probing and removing of VF device

To support probing and removing of a bnx2x virtual function
the following were added:
1. add bnx2x_vfpf.h: defines the VF to PF channel
2. add bnx2x_sriov.h: header for bnx2x SR-IOV functionality
3. enumerate VF hw types (identify VFs)
4. if driving a VF, map VF bar
5. if driving a VF, allocate Vf to PF channel
6. refactor interrupt flows to include VF
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x.h

@@ -49,6 +49,12 @@
 #include "bnx2x_dcb.h"
 #include "bnx2x_stats.h"
 
+enum bnx2x_int_mode {
+	BNX2X_INT_MODE_MSIX,
+	BNX2X_INT_MODE_INTX,
+	BNX2X_INT_MODE_MSI
+};
+
 /* error/debug prints */
 
 #define DRV_MODULE_NAME		"bnx2x"
@@ -954,6 +960,9 @@ struct bnx2x_port {
 extern struct workqueue_struct *bnx2x_wq;
 
 #define BNX2X_MAX_NUM_OF_VFS	64
+#define BNX2X_VF_CID_WND	0
+#define BNX2X_CIDS_PER_VF	(1 << BNX2X_VF_CID_WND)
+#define BNX2X_VF_CIDS		(BNX2X_MAX_NUM_OF_VFS * BNX2X_CIDS_PER_VF)
 #define BNX2X_VF_ID_INVALID	0xFF
 
 /*
@@ -1231,6 +1240,10 @@ struct bnx2x {
 	  (vn) * ((CHIP_IS_E1x(bp) || (CHIP_MODE_IS_4_PORT(bp))) ? 2  : 1))
 #define BP_FW_MB_IDX(bp)		BP_FW_MB_IDX_VN(bp, BP_VN(bp))
 
+	/* vf pf channel mailbox contains request and response buffers */
+	struct bnx2x_vf_mbx_msg	*vf2pf_mbox;
+	dma_addr_t		vf2pf_mbox_mapping;
+
 	struct net_device	*dev;
 	struct pci_dev		*pdev;
 
@@ -1318,8 +1331,6 @@ struct bnx2x {
 #define DISABLE_MSI_FLAG		(1 << 7)
 #define TPA_ENABLE_FLAG			(1 << 8)
 #define NO_MCP_FLAG			(1 << 9)
-
-#define BP_NOMCP(bp)			(bp->flags & NO_MCP_FLAG)
 #define GRO_ENABLE_FLAG			(1 << 10)
 #define MF_FUNC_DIS			(1 << 11)
 #define OWN_CNIC_IRQ			(1 << 12)
@@ -1330,6 +1341,11 @@ struct bnx2x {
 #define BC_SUPPORTS_FCOE_FEATURES	(1 << 19)
 #define USING_SINGLE_MSIX_FLAG		(1 << 20)
 #define BC_SUPPORTS_DCBX_MSG_NON_PMF	(1 << 21)
+#define IS_VF_FLAG			(1 << 22)
+
+#define BP_NOMCP(bp)			((bp)->flags & NO_MCP_FLAG)
+#define IS_VF(bp)			((bp)->flags & IS_VF_FLAG)
+#define IS_PF(bp)			(!((bp)->flags & IS_VF_FLAG))
 
 #define NO_ISCSI(bp)		((bp)->flags & NO_ISCSI_FLAG)
 #define NO_ISCSI_OOO(bp)	((bp)->flags & NO_ISCSI_OOO_FLAG)
@@ -1432,6 +1448,7 @@ struct bnx2x {
 	u8			igu_sb_cnt;
 	u8			min_msix_vec_cnt;
 
+	u32			igu_base_addr;
 	dma_addr_t		def_status_blk_mapping;
 
 	struct bnx2x_slowpath	*slowpath;

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c

@@ -1439,12 +1439,15 @@ void bnx2x_free_irq(struct bnx2x *bp)
 
 int bnx2x_enable_msix(struct bnx2x *bp)
 {
-	int msix_vec = 0, i, rc, req_cnt;
+	int msix_vec = 0, i, rc;
 
-	bp->msix_table[msix_vec].entry = msix_vec;
-	BNX2X_DEV_INFO("msix_table[0].entry = %d (slowpath)\n",
-	   bp->msix_table[0].entry);
-	msix_vec++;
+	/* VFs don't have a default status block */
+	if (IS_PF(bp)) {
+		bp->msix_table[msix_vec].entry = msix_vec;
+		BNX2X_DEV_INFO("msix_table[0].entry = %d (slowpath)\n",
+			       bp->msix_table[0].entry);
+		msix_vec++;
+	}
 
 	/* Cnic requires an msix vector for itself */
 	if (CNIC_SUPPORT(bp)) {
@@ -1462,9 +1465,10 @@ int bnx2x_enable_msix(struct bnx2x *bp)
 		msix_vec++;
 	}
 
-	req_cnt = BNX2X_NUM_ETH_QUEUES(bp) + CNIC_SUPPORT(bp) + 1;
+	DP(BNX2X_MSG_SP, "about to request enable msix with %d vectors\n",
+	   msix_vec);
 
-	rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], req_cnt);
+	rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], msix_vec);
 
 	/*
 	 * reconfigure number of tx/rx queues according to available
@@ -1472,7 +1476,7 @@ int bnx2x_enable_msix(struct bnx2x *bp)
 	 */
 	if (rc >= BNX2X_MIN_MSIX_VEC_CNT(bp)) {
 		/* how less vectors we will have? */
-		int diff = req_cnt - rc;
+		int diff = msix_vec - rc;
 
 		BNX2X_DEV_INFO("Trying to use less MSI-X vectors: %d\n", rc);
 
@@ -3905,7 +3909,10 @@ int bnx2x_alloc_mem_bp(struct bnx2x *bp)
 	 * The biggest MSI-X table we might need is as a maximum number of fast
 	 * path IGU SBs plus default SB (for PF).
 	 */
-	msix_table_size = bp->igu_sb_cnt + 1;
+	msix_table_size = bp->igu_sb_cnt;
+	if (IS_PF(bp))
+		msix_table_size++;
+	BNX2X_DEV_INFO("msix_table_size %d\n", msix_table_size);
 
 	/* fp array: RSS plus CNIC related L2 queues */
 	fp_array_size = BNX2X_MAX_RSS_COUNT(bp) + CNIC_SUPPORT(bp);

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h

@@ -863,7 +863,7 @@ static inline void bnx2x_del_all_napi(struct bnx2x *bp)
 		netif_napi_del(&bnx2x_fp(bp, i, napi));
 }
 
-void bnx2x_set_int_mode(struct bnx2x *bp);
+int bnx2x_set_int_mode(struct bnx2x *bp);
 
 static inline void bnx2x_disable_msi(struct bnx2x *bp)
 {

drivers/net/ethernet/broadcom/bnx2x/bnx2x_reg.h

@@ -6554,6 +6554,15 @@
 	(7L<<ME_REG_ABS_PF_NUM_SHIFT) /* Absolute PF Num */
 
 
+#define PXP_VF_ADDR_IGU_START				0
+#define PXP_VF_ADDR_IGU_SIZE				0x3000
+#define PXP_VF_ADDR_IGU_END\
+	((PXP_VF_ADDR_IGU_START) + (PXP_VF_ADDR_IGU_SIZE) - 1)
+#define PXP_VF_ADDR_DB_START				0x7c00
+#define PXP_VF_ADDR_DB_SIZE				0x200
+#define PXP_VF_ADDR_DB_END\
+	((PXP_VF_ADDR_DB_START) + (PXP_VF_ADDR_DB_SIZE) - 1)
+
 #define MDIO_REG_BANK_CL73_IEEEB0	0x0
 #define MDIO_CL73_IEEEB0_CL73_AN_CONTROL	0x0
 #define MDIO_CL73_IEEEB0_CL73_AN_CONTROL_RESTART_AN	0x0200

drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.h

+/* bnx2x_sriov.h: Broadcom Everest network driver.
+ *
+ * Copyright 2009-2012 Broadcom Corporation
+ *
+ * Unless you and Broadcom execute a separate written software license
+ * agreement governing use of this software, this software is licensed to you
+ * under the terms of the GNU General Public License version 2, available
+ * at http://www.gnu.org/licenses/old-licenses/gpl-2.0.html (the "GPL").
+ *
+ * Notwithstanding the above, under no circumstances may you combine this
+ * software in any way with any other Broadcom software provided under a
+ * license other than the GPL, without Broadcom's express prior written
+ * consent.
+ *
+ * Maintained by: Eilon Greenstein <eilong@broadcom.com>
+ * Written by: Shmulik Ravid <shmulikr@broadcom.com>
+ *	       Ariel Elior <ariele@broadcom.com>
+ */
+#ifndef BNX2X_SRIOV_H
+#define BNX2X_SRIOV_H
+
+struct bnx2x_vf_mbx_msg {
+	union vfpf_tlvs req;
+	union pfvf_tlvs resp;
+};
+
+#endif /* bnx2x_sriov.h */

drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.h

+/* bnx2x_vfpf.h: Broadcom Everest network driver.
+ *
+ * Copyright (c) 2011-2012 Broadcom Corporation
+ *
+ * Unless you and Broadcom execute a separate written software license
+ * agreement governing use of this software, this software is licensed to you
+ * under the terms of the GNU General Public License version 2, available
+ * at http://www.gnu.org/licenses/old-licenses/gpl-2.0.html (the "GPL").
+ *
+ * Notwithstanding the above, under no circumstances may you combine this
+ * software in any way with any other Broadcom software provided under a
+ * license other than the GPL, without Broadcom's express prior written
+ * consent.
+ *
+ * Maintained by: Eilon Greenstein <eilong@broadcom.com>
+ * Written by: Ariel Elior <ariele@broadcom.com>
+ */
+#ifndef VF_PF_IF_H
+#define VF_PF_IF_H
+
+/* HW VF-PF channel definitions
+ * A.K.A VF-PF mailbox
+ */
+#define TLV_BUFFER_SIZE			1024
+
+struct tlv_buffer_size {
+	u8 tlv_buffer[TLV_BUFFER_SIZE];
+};
+
+union vfpf_tlvs {
+	struct tlv_buffer_size		tlv_buf_size;
+};
+
+union pfvf_tlvs {
+	struct tlv_buffer_size		tlv_buf_size;
+};
+#endif /* VF_PF_IF_H */