bnx2x: reduced sparse warnings

[linux-2.6.git] / drivers / net / ethernet / broadcom / bnx2x / bnx2x_cmn.h

/* bnx2x_cmn.h: Broadcom Everest network driver.
 *
 * Copyright (c) 2007-2012 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 *
 * Maintained by: Eilon Greenstein <eilong@broadcom.com>
 * Written by: Eliezer Tamir
 * Based on code from Michael Chan's bnx2 driver
 * UDP CSUM errata workaround by Arik Gendelman
 * Slowpath and fastpath rework by Vladislav Zolotarov
 * Statistics and Link management by Yitchak Gertner
 *
 */
#ifndef BNX2X_CMN_H
#define BNX2X_CMN_H

#include <linux/types.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>


#include "bnx2x.h"

/* This is used as a replacement for an MCP if it's not present */
extern int load_count[2][3]; /* per-path: 0-common, 1-port0, 2-port1 */

extern int num_queues;

/************************ Macros ********************************/
#define BNX2X_PCI_FREE(x, y, size) \
        do { \
                if (x) { \
                        dma_free_coherent(&bp->pdev->dev, size, (void *)x, y); \
                        x = NULL; \
                        y = 0; \
                } \
        } while (0)

#define BNX2X_FREE(x) \
        do { \
                if (x) { \
                        kfree((void *)x); \
                        x = NULL; \
                } \
        } while (0)

#define BNX2X_PCI_ALLOC(x, y, size) \
        do { \
                x = dma_alloc_coherent(&bp->pdev->dev, size, y, GFP_KERNEL); \
                if (x == NULL) \
                        goto alloc_mem_err; \
                memset((void *)x, 0, size); \
        } while (0)

#define BNX2X_ALLOC(x, size) \
        do { \
                x = kzalloc(size, GFP_KERNEL); \
                if (x == NULL) \
                        goto alloc_mem_err; \
        } while (0)

/*********************** Interfaces ****************************
 *  Functions that need to be implemented by each driver version
 */
/* Init */

/**
 * bnx2x_send_unload_req - request unload mode from the MCP.
 *
 * @bp:                 driver handle
 * @unload_mode:        requested function's unload mode
 *
 * Return unload mode returned by the MCP: COMMON, PORT or FUNC.
 */
u32 bnx2x_send_unload_req(struct bnx2x *bp, int unload_mode);

/**
 * bnx2x_send_unload_done - send UNLOAD_DONE command to the MCP.
 *
 * @bp:         driver handle
 */
void bnx2x_send_unload_done(struct bnx2x *bp);

/**
 * bnx2x_config_rss_pf - configure RSS parameters.
 *
 * @bp:                 driver handle
 * @ind_table:          indirection table to configure
 * @config_hash:        re-configure RSS hash keys configuration
 */
int bnx2x_config_rss_pf(struct bnx2x *bp, u8 *ind_table, bool config_hash);

/**
 * bnx2x__init_func_obj - init function object
 *
 * @bp:                 driver handle
 *
 * Initializes the Function Object with the appropriate
 * parameters which include a function slow path driver
 * interface.
 */
void bnx2x__init_func_obj(struct bnx2x *bp);

/**
 * bnx2x_setup_queue - setup eth queue.
 *
 * @bp:         driver handle
 * @fp:         pointer to the fastpath structure
 * @leading:    boolean
 *
 */
int bnx2x_setup_queue(struct bnx2x *bp, struct bnx2x_fastpath *fp,
                       bool leading);

/**
 * bnx2x_setup_leading - bring up a leading eth queue.
 *
 * @bp:         driver handle
 */
int bnx2x_setup_leading(struct bnx2x *bp);

/**
 * bnx2x_fw_command - send the MCP a request
 *
 * @bp:         driver handle
 * @command:    request
 * @param:      request's parameter
 *
 * block until there is a reply
 */
u32 bnx2x_fw_command(struct bnx2x *bp, u32 command, u32 param);

/**
 * bnx2x_initial_phy_init - initialize link parameters structure variables.
 *
 * @bp:         driver handle
 * @load_mode:  current mode
 */
u8 bnx2x_initial_phy_init(struct bnx2x *bp, int load_mode);

/**
 * bnx2x_link_set - configure hw according to link parameters structure.
 *
 * @bp:         driver handle
 */
void bnx2x_link_set(struct bnx2x *bp);

/**
 * bnx2x_link_test - query link status.
 *
 * @bp:         driver handle
 * @is_serdes:  bool
 *
 * Returns 0 if link is UP.
 */
u8 bnx2x_link_test(struct bnx2x *bp, u8 is_serdes);

/**
 * bnx2x_drv_pulse - write driver pulse to shmem
 *
 * @bp:         driver handle
 *
 * writes the value in bp->fw_drv_pulse_wr_seq to drv_pulse mbox
 * in the shmem.
 */
void bnx2x_drv_pulse(struct bnx2x *bp);

/**
 * bnx2x_igu_ack_sb - update IGU with current SB value
 *
 * @bp:         driver handle
 * @igu_sb_id:  SB id
 * @segment:    SB segment
 * @index:      SB index
 * @op:         SB operation
 * @update:     is HW update required
 */
void bnx2x_igu_ack_sb(struct bnx2x *bp, u8 igu_sb_id, u8 segment,
                      u16 index, u8 op, u8 update);

/* Disable transactions from chip to host */
void bnx2x_pf_disable(struct bnx2x *bp);

/**
 * bnx2x__link_status_update - handles link status change.
 *
 * @bp:         driver handle
 */
void bnx2x__link_status_update(struct bnx2x *bp);

/**
 * bnx2x_link_report - report link status to upper layer.
 *
 * @bp:         driver handle
 */
void bnx2x_link_report(struct bnx2x *bp);

/* None-atomic version of bnx2x_link_report() */
void __bnx2x_link_report(struct bnx2x *bp);

/**
 * bnx2x_get_mf_speed - calculate MF speed.
 *
 * @bp:         driver handle
 *
 * Takes into account current linespeed and MF configuration.
 */
u16 bnx2x_get_mf_speed(struct bnx2x *bp);

/**
 * bnx2x_msix_sp_int - MSI-X slowpath interrupt handler
 *
 * @irq:                irq number
 * @dev_instance:       private instance
 */
irqreturn_t bnx2x_msix_sp_int(int irq, void *dev_instance);

/**
 * bnx2x_interrupt - non MSI-X interrupt handler
 *
 * @irq:                irq number
 * @dev_instance:       private instance
 */
irqreturn_t bnx2x_interrupt(int irq, void *dev_instance);
#ifdef BCM_CNIC

/**
 * bnx2x_cnic_notify - send command to cnic driver
 *
 * @bp:         driver handle
 * @cmd:        command
 */
int bnx2x_cnic_notify(struct bnx2x *bp, int cmd);

/**
 * bnx2x_setup_cnic_irq_info - provides cnic with IRQ information
 *
 * @bp:         driver handle
 */
void bnx2x_setup_cnic_irq_info(struct bnx2x *bp);
#endif

/**
 * bnx2x_int_enable - enable HW interrupts.
 *
 * @bp:         driver handle
 */
void bnx2x_int_enable(struct bnx2x *bp);

/**
 * bnx2x_int_disable_sync - disable interrupts.
 *
 * @bp:         driver handle
 * @disable_hw: true, disable HW interrupts.
 *
 * This function ensures that there are no
 * ISRs or SP DPCs (sp_task) are running after it returns.
 */
void bnx2x_int_disable_sync(struct bnx2x *bp, int disable_hw);

/**
 * bnx2x_nic_init - init driver internals.
 *
 * @bp:         driver handle
 * @load_code:  COMMON, PORT or FUNCTION
 *
 * Initializes:
 *  - rings
 *  - status blocks
 *  - etc.
 */
void bnx2x_nic_init(struct bnx2x *bp, u32 load_code);

/**
 * bnx2x_alloc_mem - allocate driver's memory.
 *
 * @bp:         driver handle
 */
int bnx2x_alloc_mem(struct bnx2x *bp);

/**
 * bnx2x_free_mem - release driver's memory.
 *
 * @bp:         driver handle
 */
void bnx2x_free_mem(struct bnx2x *bp);

/**
 * bnx2x_set_num_queues - set number of queues according to mode.
 *
 * @bp:         driver handle
 */
void bnx2x_set_num_queues(struct bnx2x *bp);

/**
 * bnx2x_chip_cleanup - cleanup chip internals.
 *
 * @bp:                 driver handle
 * @unload_mode:        COMMON, PORT, FUNCTION
 *
 * - Cleanup MAC configuration.
 * - Closes clients.
 * - etc.
 */
void bnx2x_chip_cleanup(struct bnx2x *bp, int unload_mode);

/**
 * bnx2x_acquire_hw_lock - acquire HW lock.
 *
 * @bp:         driver handle
 * @resource:   resource bit which was locked
 */
int bnx2x_acquire_hw_lock(struct bnx2x *bp, u32 resource);

/**
 * bnx2x_release_hw_lock - release HW lock.
 *
 * @bp:         driver handle
 * @resource:   resource bit which was locked
 */
int bnx2x_release_hw_lock(struct bnx2x *bp, u32 resource);

/**
 * bnx2x_release_leader_lock - release recovery leader lock
 *
 * @bp:         driver handle
 */
int bnx2x_release_leader_lock(struct bnx2x *bp);

/**
 * bnx2x_set_eth_mac - configure eth MAC address in the HW
 *
 * @bp:         driver handle
 * @set:        set or clear
 *
 * Configures according to the value in netdev->dev_addr.
 */
int bnx2x_set_eth_mac(struct bnx2x *bp, bool set);

/**
 * bnx2x_set_rx_mode - set MAC filtering configurations.
 *
 * @dev:        netdevice
 *
 * called with netif_tx_lock from dev_mcast.c
 * If bp->state is OPEN, should be called with
 * netif_addr_lock_bh()
 */
void bnx2x_set_rx_mode(struct net_device *dev);

/**
 * bnx2x_set_storm_rx_mode - configure MAC filtering rules in a FW.
 *
 * @bp:         driver handle
 *
 * If bp->state is OPEN, should be called with
 * netif_addr_lock_bh().
 */
void bnx2x_set_storm_rx_mode(struct bnx2x *bp);

/**
 * bnx2x_set_q_rx_mode - configures rx_mode for a single queue.
 *
 * @bp:                 driver handle
 * @cl_id:              client id
 * @rx_mode_flags:      rx mode configuration
 * @rx_accept_flags:    rx accept configuration
 * @tx_accept_flags:    tx accept configuration (tx switch)
 * @ramrod_flags:       ramrod configuration
 */
void bnx2x_set_q_rx_mode(struct bnx2x *bp, u8 cl_id,
                         unsigned long rx_mode_flags,
                         unsigned long rx_accept_flags,
                         unsigned long tx_accept_flags,
                         unsigned long ramrod_flags);

/* Parity errors related */
void bnx2x_set_pf_load(struct bnx2x *bp);
bool bnx2x_clear_pf_load(struct bnx2x *bp);
bool bnx2x_chk_parity_attn(struct bnx2x *bp, bool *global, bool print);
bool bnx2x_reset_is_done(struct bnx2x *bp, int engine);
void bnx2x_set_reset_in_progress(struct bnx2x *bp);
void bnx2x_set_reset_global(struct bnx2x *bp);
void bnx2x_disable_close_the_gate(struct bnx2x *bp);

/**
 * bnx2x_sp_event - handle ramrods completion.
 *
 * @fp:         fastpath handle for the event
 * @rr_cqe:     eth_rx_cqe
 */
void bnx2x_sp_event(struct bnx2x_fastpath *fp, union eth_rx_cqe *rr_cqe);

/**
 * bnx2x_ilt_set_info - prepare ILT configurations.
 *
 * @bp:         driver handle
 */
void bnx2x_ilt_set_info(struct bnx2x *bp);

/**
 * bnx2x_dcbx_init - initialize dcbx protocol.
 *
 * @bp:         driver handle
 */
void bnx2x_dcbx_init(struct bnx2x *bp);

/**
 * bnx2x_set_power_state - set power state to the requested value.
 *
 * @bp:         driver handle
 * @state:      required state D0 or D3hot
 *
 * Currently only D0 and D3hot are supported.
 */
int bnx2x_set_power_state(struct bnx2x *bp, pci_power_t state);

/**
 * bnx2x_update_max_mf_config - update MAX part of MF configuration in HW.
 *
 * @bp:         driver handle
 * @value:      new value
 */
void bnx2x_update_max_mf_config(struct bnx2x *bp, u32 value);
/* Error handling */
void bnx2x_panic_dump(struct bnx2x *bp);

void bnx2x_fw_dump_lvl(struct bnx2x *bp, const char *lvl);

/* dev_close main block */
int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode);

/* dev_open main block */
int bnx2x_nic_load(struct bnx2x *bp, int load_mode);

/* hard_xmit callback */
netdev_tx_t bnx2x_start_xmit(struct sk_buff *skb, struct net_device *dev);

/* setup_tc callback */
int bnx2x_setup_tc(struct net_device *dev, u8 num_tc);

/* select_queue callback */
u16 bnx2x_select_queue(struct net_device *dev, struct sk_buff *skb);

/* reload helper */
int bnx2x_reload_if_running(struct net_device *dev);

int bnx2x_change_mac_addr(struct net_device *dev, void *p);

/* NAPI poll Rx part */
int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget);

void bnx2x_update_rx_prod(struct bnx2x *bp, struct bnx2x_fastpath *fp,
                        u16 bd_prod, u16 rx_comp_prod, u16 rx_sge_prod);

/* NAPI poll Tx part */
int bnx2x_tx_int(struct bnx2x *bp, struct bnx2x_fp_txdata *txdata);

/* suspend/resume callbacks */
int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state);
int bnx2x_resume(struct pci_dev *pdev);

/* Release IRQ vectors */
void bnx2x_free_irq(struct bnx2x *bp);

void bnx2x_free_fp_mem(struct bnx2x *bp);
int bnx2x_alloc_fp_mem(struct bnx2x *bp);
void bnx2x_init_rx_rings(struct bnx2x *bp);
void bnx2x_free_skbs(struct bnx2x *bp);
void bnx2x_netif_stop(struct bnx2x *bp, int disable_hw);
void bnx2x_netif_start(struct bnx2x *bp);

/**
 * bnx2x_enable_msix - set msix configuration.
 *
 * @bp:         driver handle
 *
 * fills msix_table, requests vectors, updates num_queues
 * according to number of available vectors.
 */
int bnx2x_enable_msix(struct bnx2x *bp);

/**
 * bnx2x_enable_msi - request msi mode from OS, updated internals accordingly
 *
 * @bp:         driver handle
 */
int bnx2x_enable_msi(struct bnx2x *bp);

/**
 * bnx2x_poll - NAPI callback
 *
 * @napi:       napi structure
 * @budget:
 *
 */
int bnx2x_poll(struct napi_struct *napi, int budget);

/**
 * bnx2x_alloc_mem_bp - allocate memories outsize main driver structure
 *
 * @bp:         driver handle
 */
int __devinit bnx2x_alloc_mem_bp(struct bnx2x *bp);

/**
 * bnx2x_free_mem_bp - release memories outsize main driver structure
 *
 * @bp:         driver handle
 */
void bnx2x_free_mem_bp(struct bnx2x *bp);

/**
 * bnx2x_change_mtu - change mtu netdev callback
 *
 * @dev:        net device
 * @new_mtu:    requested mtu
 *
 */
int bnx2x_change_mtu(struct net_device *dev, int new_mtu);

#if defined(NETDEV_FCOE_WWNN) && defined(BCM_CNIC)
/**
 * bnx2x_fcoe_get_wwn - return the requested WWN value for this port
 *
 * @dev:        net_device
 * @wwn:        output buffer
 * @type:       WWN type: NETDEV_FCOE_WWNN (node) or NETDEV_FCOE_WWPN (port)
 *
 */
int bnx2x_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type);
#endif

netdev_features_t bnx2x_fix_features(struct net_device *dev,
                                     netdev_features_t features);
int bnx2x_set_features(struct net_device *dev, netdev_features_t features);

/**
 * bnx2x_tx_timeout - tx timeout netdev callback
 *
 * @dev:        net device
 */
void bnx2x_tx_timeout(struct net_device *dev);

/*********************** Inlines **********************************/
/*********************** Fast path ********************************/
static inline void bnx2x_update_fpsb_idx(struct bnx2x_fastpath *fp)
{
        barrier(); /* status block is written to by the chip */
        fp->fp_hc_idx = fp->sb_running_index[SM_RX_ID];
}

static inline void bnx2x_update_rx_prod_gen(struct bnx2x *bp,
                        struct bnx2x_fastpath *fp, u16 bd_prod,
                        u16 rx_comp_prod, u16 rx_sge_prod, u32 start)
{
        struct ustorm_eth_rx_producers rx_prods = {0};
        u32 i;

        /* Update producers */
        rx_prods.bd_prod = bd_prod;
        rx_prods.cqe_prod = rx_comp_prod;
        rx_prods.sge_prod = rx_sge_prod;

        /*
         * Make sure that the BD and SGE data is updated before updating the
         * producers since FW might read the BD/SGE right after the producer
         * is updated.
         * This is only applicable for weak-ordered memory model archs such
         * as IA-64. The following barrier is also mandatory since FW will
         * assumes BDs must have buffers.
         */
        wmb();

        for (i = 0; i < sizeof(rx_prods)/4; i++)
                REG_WR(bp, start + i*4, ((u32 *)&rx_prods)[i]);

        mmiowb(); /* keep prod updates ordered */

        DP(NETIF_MSG_RX_STATUS,
           "queue[%d]:  wrote  bd_prod %u  cqe_prod %u  sge_prod %u\n",
           fp->index, bd_prod, rx_comp_prod, rx_sge_prod);
}

static inline void bnx2x_igu_ack_sb_gen(struct bnx2x *bp, u8 igu_sb_id,
                                        u8 segment, u16 index, u8 op,
                                        u8 update, u32 igu_addr)
{
        struct igu_regular cmd_data = {0};

        cmd_data.sb_id_and_flags =
                        ((index << IGU_REGULAR_SB_INDEX_SHIFT) |
                         (segment << IGU_REGULAR_SEGMENT_ACCESS_SHIFT) |
                         (update << IGU_REGULAR_BUPDATE_SHIFT) |
                         (op << IGU_REGULAR_ENABLE_INT_SHIFT));

        DP(NETIF_MSG_INTR, "write 0x%08x to IGU addr 0x%x\n",
           cmd_data.sb_id_and_flags, igu_addr);
        REG_WR(bp, igu_addr, cmd_data.sb_id_and_flags);

        /* Make sure that ACK is written */
        mmiowb();
        barrier();
}

static inline void bnx2x_igu_clear_sb_gen(struct bnx2x *bp, u8 func,
                                          u8 idu_sb_id, bool is_Pf)
{
        u32 data, ctl, cnt = 100;
        u32 igu_addr_data = IGU_REG_COMMAND_REG_32LSB_DATA;
        u32 igu_addr_ctl = IGU_REG_COMMAND_REG_CTRL;
        u32 igu_addr_ack = IGU_REG_CSTORM_TYPE_0_SB_CLEANUP + (idu_sb_id/32)*4;
        u32 sb_bit =  1 << (idu_sb_id%32);
        u32 func_encode = func | (is_Pf ? 1 : 0) << IGU_FID_ENCODE_IS_PF_SHIFT;
        u32 addr_encode = IGU_CMD_E2_PROD_UPD_BASE + idu_sb_id;

        /* Not supported in BC mode */
        if (CHIP_INT_MODE_IS_BC(bp))
                return;

        data = (IGU_USE_REGISTER_cstorm_type_0_sb_cleanup
                        << IGU_REGULAR_CLEANUP_TYPE_SHIFT)      |
                IGU_REGULAR_CLEANUP_SET                         |
                IGU_REGULAR_BCLEANUP;

        ctl = addr_encode << IGU_CTRL_REG_ADDRESS_SHIFT         |
              func_encode << IGU_CTRL_REG_FID_SHIFT             |
              IGU_CTRL_CMD_TYPE_WR << IGU_CTRL_REG_TYPE_SHIFT;

        DP(NETIF_MSG_HW, "write 0x%08x to IGU(via GRC) addr 0x%x\n",
                         data, igu_addr_data);
        REG_WR(bp, igu_addr_data, data);
        mmiowb();
        barrier();
        DP(NETIF_MSG_HW, "write 0x%08x to IGU(via GRC) addr 0x%x\n",
                          ctl, igu_addr_ctl);
        REG_WR(bp, igu_addr_ctl, ctl);
        mmiowb();
        barrier();

        /* wait for clean up to finish */
        while (!(REG_RD(bp, igu_addr_ack) & sb_bit) && --cnt)
                msleep(20);


        if (!(REG_RD(bp, igu_addr_ack) & sb_bit)) {
                DP(NETIF_MSG_HW,
                   "Unable to finish IGU cleanup: idu_sb_id %d offset %d bit %d (cnt %d)\n",
                          idu_sb_id, idu_sb_id/32, idu_sb_id%32, cnt);
        }
}

static inline void bnx2x_hc_ack_sb(struct bnx2x *bp, u8 sb_id,
                                   u8 storm, u16 index, u8 op, u8 update)
{
        u32 hc_addr = (HC_REG_COMMAND_REG + BP_PORT(bp)*32 +
                       COMMAND_REG_INT_ACK);
        struct igu_ack_register igu_ack;

        igu_ack.status_block_index = index;
        igu_ack.sb_id_and_flags =
                        ((sb_id << IGU_ACK_REGISTER_STATUS_BLOCK_ID_SHIFT) |
                         (storm << IGU_ACK_REGISTER_STORM_ID_SHIFT) |
                         (update << IGU_ACK_REGISTER_UPDATE_INDEX_SHIFT) |
                         (op << IGU_ACK_REGISTER_INTERRUPT_MODE_SHIFT));

        REG_WR(bp, hc_addr, (*(u32 *)&igu_ack));

        /* Make sure that ACK is written */
        mmiowb();
        barrier();
}

static inline void bnx2x_ack_sb(struct bnx2x *bp, u8 igu_sb_id, u8 storm,
                                u16 index, u8 op, u8 update)
{
        if (bp->common.int_block == INT_BLOCK_HC)
                bnx2x_hc_ack_sb(bp, igu_sb_id, storm, index, op, update);
        else {
                u8 segment;

                if (CHIP_INT_MODE_IS_BC(bp))
                        segment = storm;
                else if (igu_sb_id != bp->igu_dsb_id)
                        segment = IGU_SEG_ACCESS_DEF;
                else if (storm == ATTENTION_ID)
                        segment = IGU_SEG_ACCESS_ATTN;
                else
                        segment = IGU_SEG_ACCESS_DEF;
                bnx2x_igu_ack_sb(bp, igu_sb_id, segment, index, op, update);
        }
}

static inline u16 bnx2x_hc_ack_int(struct bnx2x *bp)
{
        u32 hc_addr = (HC_REG_COMMAND_REG + BP_PORT(bp)*32 +
                       COMMAND_REG_SIMD_MASK);
        u32 result = REG_RD(bp, hc_addr);

        barrier();
        return result;
}

static inline u16 bnx2x_igu_ack_int(struct bnx2x *bp)
{
        u32 igu_addr = (BAR_IGU_INTMEM + IGU_REG_SISR_MDPC_WMASK_LSB_UPPER*8);
        u32 result = REG_RD(bp, igu_addr);

        DP(NETIF_MSG_INTR, "read 0x%08x from IGU addr 0x%x\n",
           result, igu_addr);

        barrier();
        return result;
}

static inline u16 bnx2x_ack_int(struct bnx2x *bp)
{
        barrier();
        if (bp->common.int_block == INT_BLOCK_HC)
                return bnx2x_hc_ack_int(bp);
        else
                return bnx2x_igu_ack_int(bp);
}

static inline int bnx2x_has_tx_work_unload(struct bnx2x_fp_txdata *txdata)
{
        /* Tell compiler that consumer and producer can change */
        barrier();
        return txdata->tx_pkt_prod != txdata->tx_pkt_cons;
}

static inline u16 bnx2x_tx_avail(struct bnx2x *bp,
                                 struct bnx2x_fp_txdata *txdata)
{
        s16 used;
        u16 prod;
        u16 cons;

        prod = txdata->tx_bd_prod;
        cons = txdata->tx_bd_cons;

        /* NUM_TX_RINGS = number of "next-page" entries
           It will be used as a threshold */
        used = SUB_S16(prod, cons) + (s16)NUM_TX_RINGS;

#ifdef BNX2X_STOP_ON_ERROR
        WARN_ON(used < 0);
        WARN_ON(used > bp->tx_ring_size);
        WARN_ON((bp->tx_ring_size - used) > MAX_TX_AVAIL);
#endif

        return (s16)(bp->tx_ring_size) - used;
}

static inline int bnx2x_tx_queue_has_work(struct bnx2x_fp_txdata *txdata)
{
        u16 hw_cons;

        /* Tell compiler that status block fields can change */
        barrier();
        hw_cons = le16_to_cpu(*txdata->tx_cons_sb);
        return hw_cons != txdata->tx_pkt_cons;
}

static inline bool bnx2x_has_tx_work(struct bnx2x_fastpath *fp)
{
        u8 cos;
        for_each_cos_in_tx_queue(fp, cos)
                if (bnx2x_tx_queue_has_work(&fp->txdata[cos]))
                        return true;
        return false;
}

static inline int bnx2x_has_rx_work(struct bnx2x_fastpath *fp)
{
        u16 rx_cons_sb;

        /* Tell compiler that status block fields can change */
        barrier();
        rx_cons_sb = le16_to_cpu(*fp->rx_cons_sb);
        if ((rx_cons_sb & MAX_RCQ_DESC_CNT) == MAX_RCQ_DESC_CNT)
                rx_cons_sb++;
        return (fp->rx_comp_cons != rx_cons_sb);
}

/**
 * bnx2x_tx_disable - disables tx from stack point of view
 *
 * @bp:         driver handle
 */
static inline void bnx2x_tx_disable(struct bnx2x *bp)
{
        netif_tx_disable(bp->dev);
        netif_carrier_off(bp->dev);
}

static inline void bnx2x_free_rx_sge(struct bnx2x *bp,
                                     struct bnx2x_fastpath *fp, u16 index)
{
        struct sw_rx_page *sw_buf = &fp->rx_page_ring[index];
        struct page *page = sw_buf->page;
        struct eth_rx_sge *sge = &fp->rx_sge_ring[index];

        /* Skip "next page" elements */
        if (!page)
                return;

        dma_unmap_page(&bp->pdev->dev, dma_unmap_addr(sw_buf, mapping),
                       SGE_PAGE_SIZE*PAGES_PER_SGE, DMA_FROM_DEVICE);
        __free_pages(page, PAGES_PER_SGE_SHIFT);

        sw_buf->page = NULL;
        sge->addr_hi = 0;
        sge->addr_lo = 0;
}

static inline void bnx2x_add_all_napi(struct bnx2x *bp)
{
        int i;

        /* Add NAPI objects */
        for_each_rx_queue(bp, i)
                netif_napi_add(bp->dev, &bnx2x_fp(bp, i, napi),
                               bnx2x_poll, BNX2X_NAPI_WEIGHT);
}

static inline void bnx2x_del_all_napi(struct bnx2x *bp)
{
        int i;

        for_each_rx_queue(bp, i)
                netif_napi_del(&bnx2x_fp(bp, i, napi));
}

static inline void bnx2x_disable_msi(struct bnx2x *bp)
{
        if (bp->flags & USING_MSIX_FLAG) {
                pci_disable_msix(bp->pdev);
                bp->flags &= ~USING_MSIX_FLAG;
        } else if (bp->flags & USING_MSI_FLAG) {
                pci_disable_msi(bp->pdev);
                bp->flags &= ~USING_MSI_FLAG;
        }
}

static inline int bnx2x_calc_num_queues(struct bnx2x *bp)
{
        return  num_queues ?
                 min_t(int, num_queues, BNX2X_MAX_QUEUES(bp)) :
                 min_t(int, num_online_cpus(), BNX2X_MAX_QUEUES(bp));
}

static inline void bnx2x_clear_sge_mask_next_elems(struct bnx2x_fastpath *fp)
{
        int i, j;

        for (i = 1; i <= NUM_RX_SGE_PAGES; i++) {
                int idx = RX_SGE_CNT * i - 1;

                for (j = 0; j < 2; j++) {
                        BIT_VEC64_CLEAR_BIT(fp->sge_mask, idx);
                        idx--;
                }
        }
}

static inline void bnx2x_init_sge_ring_bit_mask(struct bnx2x_fastpath *fp)
{
        /* Set the mask to all 1-s: it's faster to compare to 0 than to 0xf-s */
        memset(fp->sge_mask, 0xff, sizeof(fp->sge_mask));

        /* Clear the two last indices in the page to 1:
           these are the indices that correspond to the "next" element,
           hence will never be indicated and should be removed from
           the calculations. */
        bnx2x_clear_sge_mask_next_elems(fp);
}

static inline int bnx2x_alloc_rx_sge(struct bnx2x *bp,
                                     struct bnx2x_fastpath *fp, u16 index)
{
        struct page *page = alloc_pages(GFP_ATOMIC, PAGES_PER_SGE_SHIFT);
        struct sw_rx_page *sw_buf = &fp->rx_page_ring[index];
        struct eth_rx_sge *sge = &fp->rx_sge_ring[index];
        dma_addr_t mapping;

        if (unlikely(page == NULL)) {
                BNX2X_ERR("Can't alloc sge\n");
                return -ENOMEM;
        }

        mapping = dma_map_page(&bp->pdev->dev, page, 0,
                               SGE_PAGE_SIZE*PAGES_PER_SGE, DMA_FROM_DEVICE);
        if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
                __free_pages(page, PAGES_PER_SGE_SHIFT);
                BNX2X_ERR("Can't map sge\n");
                return -ENOMEM;
        }

        sw_buf->page = page;
        dma_unmap_addr_set(sw_buf, mapping, mapping);

        sge->addr_hi = cpu_to_le32(U64_HI(mapping));
        sge->addr_lo = cpu_to_le32(U64_LO(mapping));

        return 0;
}

static inline int bnx2x_alloc_rx_data(struct bnx2x *bp,
                                      struct bnx2x_fastpath *fp, u16 index)
{
        u8 *data;
        struct sw_rx_bd *rx_buf = &fp->rx_buf_ring[index];
        struct eth_rx_bd *rx_bd = &fp->rx_desc_ring[index];
        dma_addr_t mapping;

        data = kmalloc(fp->rx_buf_size + NET_SKB_PAD, GFP_ATOMIC);
        if (unlikely(data == NULL))
                return -ENOMEM;

        mapping = dma_map_single(&bp->pdev->dev, data + NET_SKB_PAD,
                                 fp->rx_buf_size,
                                 DMA_FROM_DEVICE);
        if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
                kfree(data);
                BNX2X_ERR("Can't map rx data\n");
                return -ENOMEM;
        }

        rx_buf->data = data;
        dma_unmap_addr_set(rx_buf, mapping, mapping);

        rx_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
        rx_bd->addr_lo = cpu_to_le32(U64_LO(mapping));

        return 0;
}

/* note that we are not allocating a new buffer,
 * we are just moving one from cons to prod
 * we are not creating a new mapping,
 * so there is no need to check for dma_mapping_error().
 */
static inline void bnx2x_reuse_rx_data(struct bnx2x_fastpath *fp,
                                      u16 cons, u16 prod)
{
        struct sw_rx_bd *cons_rx_buf = &fp->rx_buf_ring[cons];
        struct sw_rx_bd *prod_rx_buf = &fp->rx_buf_ring[prod];
        struct eth_rx_bd *cons_bd = &fp->rx_desc_ring[cons];
        struct eth_rx_bd *prod_bd = &fp->rx_desc_ring[prod];

        dma_unmap_addr_set(prod_rx_buf, mapping,
                           dma_unmap_addr(cons_rx_buf, mapping));
        prod_rx_buf->data = cons_rx_buf->data;
        *prod_bd = *cons_bd;
}

/************************* Init ******************************************/

/**
 * bnx2x_func_start - init function
 *
 * @bp:         driver handle
 *
 * Must be called before sending CLIENT_SETUP for the first client.
 */
static inline int bnx2x_func_start(struct bnx2x *bp)
{
        struct bnx2x_func_state_params func_params = {NULL};
        struct bnx2x_func_start_params *start_params =
                &func_params.params.start;

        /* Prepare parameters for function state transitions */
        __set_bit(RAMROD_COMP_WAIT, &func_params.ramrod_flags);

        func_params.f_obj = &bp->func_obj;
        func_params.cmd = BNX2X_F_CMD_START;

        /* Function parameters */
        start_params->mf_mode = bp->mf_mode;
        start_params->sd_vlan_tag = bp->mf_ov;

        if (CHIP_IS_E2(bp) || CHIP_IS_E3(bp))
                start_params->network_cos_mode = STATIC_COS;
        else /* CHIP_IS_E1X */
                start_params->network_cos_mode = FW_WRR;

        return bnx2x_func_state_change(bp, &func_params);
}


/**
 * bnx2x_set_fw_mac_addr - fill in a MAC address in FW format
 *
 * @fw_hi:      pointer to upper part
 * @fw_mid:     pointer to middle part
 * @fw_lo:      pointer to lower part
 * @mac:        pointer to MAC address
 */
static inline void bnx2x_set_fw_mac_addr(u16 *fw_hi, u16 *fw_mid, u16 *fw_lo,
                                         u8 *mac)
{
        ((u8 *)fw_hi)[0]  = mac[1];
        ((u8 *)fw_hi)[1]  = mac[0];
        ((u8 *)fw_mid)[0] = mac[3];
        ((u8 *)fw_mid)[1] = mac[2];
        ((u8 *)fw_lo)[0]  = mac[5];
        ((u8 *)fw_lo)[1]  = mac[4];
}

static inline void bnx2x_free_rx_sge_range(struct bnx2x *bp,
                                           struct bnx2x_fastpath *fp, int last)
{
        int i;

        if (fp->disable_tpa)
                return;

        for (i = 0; i < last; i++)
                bnx2x_free_rx_sge(bp, fp, i);
}

static inline void bnx2x_free_tpa_pool(struct bnx2x *bp,
                                       struct bnx2x_fastpath *fp, int last)
{
        int i;

        for (i = 0; i < last; i++) {
                struct bnx2x_agg_info *tpa_info = &fp->tpa_info[i];
                struct sw_rx_bd *first_buf = &tpa_info->first_buf;
                u8 *data = first_buf->data;

                if (data == NULL) {
                        DP(NETIF_MSG_IFDOWN, "tpa bin %d empty on free\n", i);
                        continue;
                }
                if (tpa_info->tpa_state == BNX2X_TPA_START)
                        dma_unmap_single(&bp->pdev->dev,
                                         dma_unmap_addr(first_buf, mapping),
                                         fp->rx_buf_size, DMA_FROM_DEVICE);
                kfree(data);
                first_buf->data = NULL;
        }
}

static inline void bnx2x_init_tx_ring_one(struct bnx2x_fp_txdata *txdata)
{
        int i;

        for (i = 1; i <= NUM_TX_RINGS; i++) {
                struct eth_tx_next_bd *tx_next_bd =
                        &txdata->tx_desc_ring[TX_DESC_CNT * i - 1].next_bd;

                tx_next_bd->addr_hi =
                        cpu_to_le32(U64_HI(txdata->tx_desc_mapping +
                                    BCM_PAGE_SIZE*(i % NUM_TX_RINGS)));
                tx_next_bd->addr_lo =
                        cpu_to_le32(U64_LO(txdata->tx_desc_mapping +
                                    BCM_PAGE_SIZE*(i % NUM_TX_RINGS)));
        }

        SET_FLAG(txdata->tx_db.data.header.header, DOORBELL_HDR_DB_TYPE, 1);
        txdata->tx_db.data.zero_fill1 = 0;
        txdata->tx_db.data.prod = 0;

        txdata->tx_pkt_prod = 0;
        txdata->tx_pkt_cons = 0;
        txdata->tx_bd_prod = 0;
        txdata->tx_bd_cons = 0;
        txdata->tx_pkt = 0;
}

static inline void bnx2x_init_tx_rings(struct bnx2x *bp)
{
        int i;
        u8 cos;

        for_each_tx_queue(bp, i)
                for_each_cos_in_tx_queue(&bp->fp[i], cos)
                        bnx2x_init_tx_ring_one(&bp->fp[i].txdata[cos]);
}

static inline void bnx2x_set_next_page_rx_bd(struct bnx2x_fastpath *fp)
{
        int i;

        for (i = 1; i <= NUM_RX_RINGS; i++) {
                struct eth_rx_bd *rx_bd;

                rx_bd = &fp->rx_desc_ring[RX_DESC_CNT * i - 2];
                rx_bd->addr_hi =
                        cpu_to_le32(U64_HI(fp->rx_desc_mapping +
                                    BCM_PAGE_SIZE*(i % NUM_RX_RINGS)));
                rx_bd->addr_lo =
                        cpu_to_le32(U64_LO(fp->rx_desc_mapping +
                                    BCM_PAGE_SIZE*(i % NUM_RX_RINGS)));
        }
}

static inline void bnx2x_set_next_page_sgl(struct bnx2x_fastpath *fp)
{
        int i;

        for (i = 1; i <= NUM_RX_SGE_PAGES; i++) {
                struct eth_rx_sge *sge;

                sge = &fp->rx_sge_ring[RX_SGE_CNT * i - 2];
                sge->addr_hi =
                        cpu_to_le32(U64_HI(fp->rx_sge_mapping +
                        BCM_PAGE_SIZE*(i % NUM_RX_SGE_PAGES)));

                sge->addr_lo =
                        cpu_to_le32(U64_LO(fp->rx_sge_mapping +
                        BCM_PAGE_SIZE*(i % NUM_RX_SGE_PAGES)));
        }
}

static inline void bnx2x_set_next_page_rx_cq(struct bnx2x_fastpath *fp)
{
        int i;
        for (i = 1; i <= NUM_RCQ_RINGS; i++) {
                struct eth_rx_cqe_next_page *nextpg;

                nextpg = (struct eth_rx_cqe_next_page *)
                        &fp->rx_comp_ring[RCQ_DESC_CNT * i - 1];
                nextpg->addr_hi =
                        cpu_to_le32(U64_HI(fp->rx_comp_mapping +
                                   BCM_PAGE_SIZE*(i % NUM_RCQ_RINGS)));
                nextpg->addr_lo =
                        cpu_to_le32(U64_LO(fp->rx_comp_mapping +
                                   BCM_PAGE_SIZE*(i % NUM_RCQ_RINGS)));
        }
}

/* Returns the number of actually allocated BDs */
static inline int bnx2x_alloc_rx_bds(struct bnx2x_fastpath *fp,
                                      int rx_ring_size)
{
        struct bnx2x *bp = fp->bp;
        u16 ring_prod, cqe_ring_prod;
        int i, failure_cnt = 0;

        fp->rx_comp_cons = 0;
        cqe_ring_prod = ring_prod = 0;

        /* This routine is called only during fo init so
         * fp->eth_q_stats.rx_skb_alloc_failed = 0
         */
        for (i = 0; i < rx_ring_size; i++) {
                if (bnx2x_alloc_rx_data(bp, fp, ring_prod) < 0) {
                        failure_cnt++;
                        continue;
                }
                ring_prod = NEXT_RX_IDX(ring_prod);
                cqe_ring_prod = NEXT_RCQ_IDX(cqe_ring_prod);
                WARN_ON(ring_prod <= (i - failure_cnt));
        }

        if (failure_cnt)
                BNX2X_ERR("was only able to allocate %d rx skbs on queue[%d]\n",
                          i - failure_cnt, fp->index);

        fp->rx_bd_prod = ring_prod;
        /* Limit the CQE producer by the CQE ring size */
        fp->rx_comp_prod = min_t(u16, NUM_RCQ_RINGS*RCQ_DESC_CNT,
                               cqe_ring_prod);
        fp->rx_pkt = fp->rx_calls = 0;

        fp->eth_q_stats.rx_skb_alloc_failed += failure_cnt;

        return i - failure_cnt;
}

/* Statistics ID are global per chip/path, while Client IDs for E1x are per
 * port.
 */
static inline u8 bnx2x_stats_id(struct bnx2x_fastpath *fp)
{
        struct bnx2x *bp = fp->bp;
        if (!CHIP_IS_E1x(bp)) {
#ifdef BCM_CNIC
                /* there are special statistics counters for FCoE 136..140 */
                if (IS_FCOE_FP(fp))
                        return bp->cnic_base_cl_id + (bp->pf_num >> 1);
#endif
                return fp->cl_id;
        }
        return fp->cl_id + BP_PORT(bp) * FP_SB_MAX_E1x;
}

static inline void bnx2x_init_vlan_mac_fp_objs(struct bnx2x_fastpath *fp,
                                               bnx2x_obj_type obj_type)
{
        struct bnx2x *bp = fp->bp;

        /* Configure classification DBs */
        bnx2x_init_mac_obj(bp, &fp->mac_obj, fp->cl_id, fp->cid,
                           BP_FUNC(bp), bnx2x_sp(bp, mac_rdata),
                           bnx2x_sp_mapping(bp, mac_rdata),
                           BNX2X_FILTER_MAC_PENDING,
                           &bp->sp_state, obj_type,
                           &bp->macs_pool);
}

/**
 * bnx2x_get_path_func_num - get number of active functions
 *
 * @bp:         driver handle
 *
 * Calculates the number of active (not hidden) functions on the
 * current path.
 */
static inline u8 bnx2x_get_path_func_num(struct bnx2x *bp)
{
        u8 func_num = 0, i;

        /* 57710 has only one function per-port */
        if (CHIP_IS_E1(bp))
                return 1;

        /* Calculate a number of functions enabled on the current
         * PATH/PORT.
         */
        if (CHIP_REV_IS_SLOW(bp)) {
                if (IS_MF(bp))
                        func_num = 4;
                else
                        func_num = 2;
        } else {
                for (i = 0; i < E1H_FUNC_MAX / 2; i++) {
                        u32 func_config =
                                MF_CFG_RD(bp,
                                          func_mf_config[BP_PORT(bp) + 2 * i].
                                          config);
                        func_num +=
                                ((func_config & FUNC_MF_CFG_FUNC_HIDE) ? 0 : 1);
                }
        }

        WARN_ON(!func_num);

        return func_num;
}

static inline void bnx2x_init_bp_objs(struct bnx2x *bp)
{
        /* RX_MODE controlling object */
        bnx2x_init_rx_mode_obj(bp, &bp->rx_mode_obj);

        /* multicast configuration controlling object */
        bnx2x_init_mcast_obj(bp, &bp->mcast_obj, bp->fp->cl_id, bp->fp->cid,
                             BP_FUNC(bp), BP_FUNC(bp),
                             bnx2x_sp(bp, mcast_rdata),
                             bnx2x_sp_mapping(bp, mcast_rdata),
                             BNX2X_FILTER_MCAST_PENDING, &bp->sp_state,
                             BNX2X_OBJ_TYPE_RX);

        /* Setup CAM credit pools */
        bnx2x_init_mac_credit_pool(bp, &bp->macs_pool, BP_FUNC(bp),
                                   bnx2x_get_path_func_num(bp));

        /* RSS configuration object */
        bnx2x_init_rss_config_obj(bp, &bp->rss_conf_obj, bp->fp->cl_id,
                                  bp->fp->cid, BP_FUNC(bp), BP_FUNC(bp),
                                  bnx2x_sp(bp, rss_rdata),
                                  bnx2x_sp_mapping(bp, rss_rdata),
                                  BNX2X_FILTER_RSS_CONF_PENDING, &bp->sp_state,
                                  BNX2X_OBJ_TYPE_RX);
}

static inline u8 bnx2x_fp_qzone_id(struct bnx2x_fastpath *fp)
{
        if (CHIP_IS_E1x(fp->bp))
                return fp->cl_id + BP_PORT(fp->bp) * ETH_MAX_RX_CLIENTS_E1H;
        else
                return fp->cl_id;
}

static inline u32 bnx2x_rx_ustorm_prods_offset(struct bnx2x_fastpath *fp)
{
        struct bnx2x *bp = fp->bp;

        if (!CHIP_IS_E1x(bp))
                return USTORM_RX_PRODS_E2_OFFSET(fp->cl_qzone_id);
        else
                return USTORM_RX_PRODS_E1X_OFFSET(BP_PORT(bp), fp->cl_id);
}

static inline void bnx2x_init_txdata(struct bnx2x *bp,
        struct bnx2x_fp_txdata *txdata, u32 cid, int txq_index,
        __le16 *tx_cons_sb)
{
        txdata->cid = cid;
        txdata->txq_index = txq_index;
        txdata->tx_cons_sb = tx_cons_sb;

        DP(NETIF_MSG_IFUP, "created tx data cid %d, txq %d\n",
           txdata->cid, txdata->txq_index);
}

#ifdef BCM_CNIC
static inline u8 bnx2x_cnic_eth_cl_id(struct bnx2x *bp, u8 cl_idx)
{
        return bp->cnic_base_cl_id + cl_idx +
                (bp->pf_num >> 1) * BNX2X_MAX_CNIC_ETH_CL_ID_IDX;
}

static inline u8 bnx2x_cnic_fw_sb_id(struct bnx2x *bp)
{

        /* the 'first' id is allocated for the cnic */
        return bp->base_fw_ndsb;
}

static inline u8 bnx2x_cnic_igu_sb_id(struct bnx2x *bp)
{
        return bp->igu_base_sb;
}


static inline void bnx2x_init_fcoe_fp(struct bnx2x *bp)
{
        struct bnx2x_fastpath *fp = bnx2x_fcoe_fp(bp);
        unsigned long q_type = 0;

        bnx2x_fcoe(bp, rx_queue) = BNX2X_NUM_ETH_QUEUES(bp);
        bnx2x_fcoe(bp, cl_id) = bnx2x_cnic_eth_cl_id(bp,
                                                     BNX2X_FCOE_ETH_CL_ID_IDX);
        /** Current BNX2X_FCOE_ETH_CID deffinition implies not more than
         *  16 ETH clients per function when CNIC is enabled!
         *
         *  Fix it ASAP!!!
         */
        bnx2x_fcoe(bp, cid) = BNX2X_FCOE_ETH_CID;
        bnx2x_fcoe(bp, fw_sb_id) = DEF_SB_ID;
        bnx2x_fcoe(bp, igu_sb_id) = bp->igu_dsb_id;
        bnx2x_fcoe(bp, rx_cons_sb) = BNX2X_FCOE_L2_RX_INDEX;

        bnx2x_init_txdata(bp, &bnx2x_fcoe(bp, txdata[0]),
                          fp->cid, FCOE_TXQ_IDX(bp), BNX2X_FCOE_L2_TX_INDEX);

        DP(NETIF_MSG_IFUP, "created fcoe tx data (fp index %d)\n", fp->index);

        /* qZone id equals to FW (per path) client id */
        bnx2x_fcoe(bp, cl_qzone_id) = bnx2x_fp_qzone_id(fp);
        /* init shortcut */
        bnx2x_fcoe(bp, ustorm_rx_prods_offset) =
                bnx2x_rx_ustorm_prods_offset(fp);

        /* Configure Queue State object */
        __set_bit(BNX2X_Q_TYPE_HAS_RX, &q_type);
        __set_bit(BNX2X_Q_TYPE_HAS_TX, &q_type);

        /* No multi-CoS for FCoE L2 client */
        BUG_ON(fp->max_cos != 1);

        bnx2x_init_queue_obj(bp, &fp->q_obj, fp->cl_id, &fp->cid, 1,
                             BP_FUNC(bp), bnx2x_sp(bp, q_rdata),
                             bnx2x_sp_mapping(bp, q_rdata), q_type);

        DP(NETIF_MSG_IFUP,
           "queue[%d]: bnx2x_init_sb(%p,%p) cl_id %d fw_sb %d igu_sb %d\n",
           fp->index, bp, fp->status_blk.e2_sb, fp->cl_id, fp->fw_sb_id,
           fp->igu_sb_id);
}
#endif

static inline int bnx2x_clean_tx_queue(struct bnx2x *bp,
                                       struct bnx2x_fp_txdata *txdata)
{
        int cnt = 1000;

        while (bnx2x_has_tx_work_unload(txdata)) {
                if (!cnt) {
                        BNX2X_ERR("timeout waiting for queue[%d]: txdata->tx_pkt_prod(%d) != txdata->tx_pkt_cons(%d)\n",
                                  txdata->txq_index, txdata->tx_pkt_prod,
                                  txdata->tx_pkt_cons);
#ifdef BNX2X_STOP_ON_ERROR
                        bnx2x_panic();
                        return -EBUSY;
#else
                        break;
#endif
                }
                cnt--;
                usleep_range(1000, 1000);
        }

        return 0;
}

int bnx2x_get_link_cfg_idx(struct bnx2x *bp);

static inline void __storm_memset_struct(struct bnx2x *bp,
                                         u32 addr, size_t size, u32 *data)
{
        int i;
        for (i = 0; i < size/4; i++)
                REG_WR(bp, addr + (i * 4), data[i]);
}

static inline void storm_memset_func_cfg(struct bnx2x *bp,
                                struct tstorm_eth_function_common_config *tcfg,
                                u16 abs_fid)
{
        size_t size = sizeof(struct tstorm_eth_function_common_config);

        u32 addr = BAR_TSTRORM_INTMEM +
                        TSTORM_FUNCTION_COMMON_CONFIG_OFFSET(abs_fid);

        __storm_memset_struct(bp, addr, size, (u32 *)tcfg);
}

static inline void storm_memset_cmng(struct bnx2x *bp,
                                struct cmng_struct_per_port *cmng,
                                u8 port)
{
        size_t size = sizeof(struct cmng_struct_per_port);

        u32 addr = BAR_XSTRORM_INTMEM +
                        XSTORM_CMNG_PER_PORT_VARS_OFFSET(port);

        __storm_memset_struct(bp, addr, size, (u32 *)cmng);
}

/**
 * bnx2x_wait_sp_comp - wait for the outstanding SP commands.
 *
 * @bp:         driver handle
 * @mask:       bits that need to be cleared
 */
static inline bool bnx2x_wait_sp_comp(struct bnx2x *bp, unsigned long mask)
{
        int tout = 5000; /* Wait for 5 secs tops */

        while (tout--) {
                smp_mb();
                netif_addr_lock_bh(bp->dev);
                if (!(bp->sp_state & mask)) {
                        netif_addr_unlock_bh(bp->dev);
                        return true;
                }
                netif_addr_unlock_bh(bp->dev);

                usleep_range(1000, 1000);
        }

        smp_mb();

        netif_addr_lock_bh(bp->dev);
        if (bp->sp_state & mask) {
                BNX2X_ERR("Filtering completion timed out. sp_state 0x%lx, mask 0x%lx\n",
                          bp->sp_state, mask);
                netif_addr_unlock_bh(bp->dev);
                return false;
        }
        netif_addr_unlock_bh(bp->dev);

        return true;
}

/**
 * bnx2x_set_ctx_validation - set CDU context validation values
 *
 * @bp:         driver handle
 * @cxt:        context of the connection on the host memory
 * @cid:        SW CID of the connection to be configured
 */
void bnx2x_set_ctx_validation(struct bnx2x *bp, struct eth_context *cxt,
                              u32 cid);

void bnx2x_update_coalesce_sb_index(struct bnx2x *bp, u8 fw_sb_id,
                                    u8 sb_index, u8 disable, u16 usec);
void bnx2x_acquire_phy_lock(struct bnx2x *bp);
void bnx2x_release_phy_lock(struct bnx2x *bp);

/**
 * bnx2x_extract_max_cfg - extract MAX BW part from MF configuration.
 *
 * @bp:         driver handle
 * @mf_cfg:     MF configuration
 *
 */
static inline u16 bnx2x_extract_max_cfg(struct bnx2x *bp, u32 mf_cfg)
{
        u16 max_cfg = (mf_cfg & FUNC_MF_CFG_MAX_BW_MASK) >>
                              FUNC_MF_CFG_MAX_BW_SHIFT;
        if (!max_cfg) {
                DP(NETIF_MSG_IFUP | BNX2X_MSG_ETHTOOL,
                   "Max BW configured to 0 - using 100 instead\n");
                max_cfg = 100;
        }
        return max_cfg;
}

/* checks if HW supports GRO for given MTU */
static inline bool bnx2x_mtu_allows_gro(int mtu)
{
        /* gro frags per page */
        int fpp = SGE_PAGE_SIZE / (mtu - ETH_MAX_TPA_HEADER_SIZE);

        /*
         * 1. number of frags should not grow above MAX_SKB_FRAGS
         * 2. frag must fit the page
         */
        return mtu <= SGE_PAGE_SIZE && (U_ETH_SGL_SIZE * fpp) <= MAX_SKB_FRAGS;
}

static inline bool bnx2x_need_gro_check(int mtu)
{
        return (SGE_PAGES / (mtu - ETH_MAX_TPA_HEADER_SIZE - 1)) !=
                (SGE_PAGES / (mtu - ETH_MIN_TPA_HEADER_SIZE + 1));
}

/**
 * bnx2x_bz_fp - zero content of the fastpath structure.
 *
 * @bp:         driver handle
 * @index:      fastpath index to be zeroed
 *
 * Makes sure the contents of the bp->fp[index].napi is kept
 * intact.
 */
static inline void bnx2x_bz_fp(struct bnx2x *bp, int index)
{
        struct bnx2x_fastpath *fp = &bp->fp[index];
        struct napi_struct orig_napi = fp->napi;
        /* bzero bnx2x_fastpath contents */
        if (bp->stats_init)
                memset(fp, 0, sizeof(*fp));
        else {
                /* Keep Queue statistics */
                struct bnx2x_eth_q_stats *tmp_eth_q_stats;
                struct bnx2x_eth_q_stats_old *tmp_eth_q_stats_old;

                tmp_eth_q_stats = kzalloc(sizeof(struct bnx2x_eth_q_stats),
                                          GFP_KERNEL);
                if (tmp_eth_q_stats)
                        memcpy(tmp_eth_q_stats, &fp->eth_q_stats,
                               sizeof(struct bnx2x_eth_q_stats));

                tmp_eth_q_stats_old =
                        kzalloc(sizeof(struct bnx2x_eth_q_stats_old),
                                GFP_KERNEL);
                if (tmp_eth_q_stats_old)
                        memcpy(tmp_eth_q_stats_old, &fp->eth_q_stats_old,
                               sizeof(struct bnx2x_eth_q_stats_old));

                memset(fp, 0, sizeof(*fp));

                if (tmp_eth_q_stats) {
                        memcpy(&fp->eth_q_stats, tmp_eth_q_stats,
                                   sizeof(struct bnx2x_eth_q_stats));
                        kfree(tmp_eth_q_stats);
                }

                if (tmp_eth_q_stats_old) {
                        memcpy(&fp->eth_q_stats_old, tmp_eth_q_stats_old,
                               sizeof(struct bnx2x_eth_q_stats_old));
                        kfree(tmp_eth_q_stats_old);
                }

        }

        /* Restore the NAPI object as it has been already initialized */
        fp->napi = orig_napi;

        fp->bp = bp;
        fp->index = index;
        if (IS_ETH_FP(fp))
                fp->max_cos = bp->max_cos;
        else
                /* Special queues support only one CoS */
                fp->max_cos = 1;

        /*
         * set the tpa flag for each queue. The tpa flag determines the queue
         * minimal size so it must be set prior to queue memory allocation
         */
        fp->disable_tpa = !(bp->flags & TPA_ENABLE_FLAG ||
                                  (bp->flags & GRO_ENABLE_FLAG &&
                                   bnx2x_mtu_allows_gro(bp->dev->mtu)));
        if (bp->flags & TPA_ENABLE_FLAG)
                fp->mode = TPA_MODE_LRO;
        else if (bp->flags & GRO_ENABLE_FLAG)
                fp->mode = TPA_MODE_GRO;

#ifdef BCM_CNIC
        /* We don't want TPA on an FCoE L2 ring */
        if (IS_FCOE_FP(fp))
                fp->disable_tpa = 1;
#endif
}

#ifdef BCM_CNIC
/**
 * bnx2x_get_iscsi_info - update iSCSI params according to licensing info.
 *
 * @bp:         driver handle
 *
 */
void bnx2x_get_iscsi_info(struct bnx2x *bp);
#endif
/* returns func by VN for current port */
static inline int func_by_vn(struct bnx2x *bp, int vn)
{
        return 2 * vn + BP_PORT(bp);
}

/**
 * bnx2x_link_sync_notify - send notification to other functions.
 *
 * @bp:         driver handle
 *
 */
static inline void bnx2x_link_sync_notify(struct bnx2x *bp)
{
        int func;
        int vn;

        /* Set the attention towards other drivers on the same port */
        for (vn = VN_0; vn < BP_MAX_VN_NUM(bp); vn++) {
                if (vn == BP_VN(bp))
                        continue;

                func = func_by_vn(bp, vn);
                REG_WR(bp, MISC_REG_AEU_GENERAL_ATTN_0 +
                       (LINK_SYNC_ATTENTION_BIT_FUNC_0 + func)*4, 1);
        }
}

/**
 * bnx2x_update_drv_flags - update flags in shmem
 *
 * @bp:         driver handle
 * @flags:      flags to update
 * @set:        set or clear
 *
 */
static inline void bnx2x_update_drv_flags(struct bnx2x *bp, u32 flags, u32 set)
{
        if (SHMEM2_HAS(bp, drv_flags)) {
                u32 drv_flags;
                bnx2x_acquire_hw_lock(bp, HW_LOCK_RESOURCE_DRV_FLAGS);
                drv_flags = SHMEM2_RD(bp, drv_flags);

                if (set)
                        SET_FLAGS(drv_flags, flags);
                else
                        RESET_FLAGS(drv_flags, flags);

                SHMEM2_WR(bp, drv_flags, drv_flags);
                DP(NETIF_MSG_IFUP, "drv_flags 0x%08x\n", drv_flags);
                bnx2x_release_hw_lock(bp, HW_LOCK_RESOURCE_DRV_FLAGS);
        }
}

static inline bool bnx2x_is_valid_ether_addr(struct bnx2x *bp, u8 *addr)
{
        if (is_valid_ether_addr(addr))
                return true;
#ifdef BCM_CNIC
        if (is_zero_ether_addr(addr) && IS_MF_ISCSI_SD(bp))
                return true;
#endif
        return false;
}

#endif /* BNX2X_CMN_H */