sfc_hunt.c

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/**************************************************************************
 *
 * Device driver for Solarflare Communications EF10 devices
 *
 * Written by Shradha Shah, maintained by <pre-boot-drivers@xilinx.com>
 *
 * Copyright 2012-2019 Solarflare Communications Inc.
 * Copyright 2019-2020 Xilinx Inc.
 *
 * 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; either version 2 of the
 * License, or any later version.
 *
 * You can also choose to distribute this program under the terms of
 * the Unmodified Binary Distribution Licence (as given in the file
 * COPYING.UBDL), provided that you have satisfied its requirements.
 *
 ***************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <byteswap.h>
#include <ipxe/io.h>
#include <ipxe/pci.h>
#include <ipxe/malloc.h>
#include <ipxe/ethernet.h>
#include <ipxe/iobuf.h>
#include <ipxe/netdevice.h>
#include "efx_hunt.h"
#include "efx_bitfield.h"
#include "ef10_regs.h"
#include "mc_driver_pcol.h"
#include <ipxe/if_ether.h>
 
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
#define HUNTINGTON_NVRAM_CHUNK 0x80
#define HUNTINGTON_NVS_MAX_LENGTH 0x1000
 
#define EMCDI_IO(code)  EUNIQ(EINFO_EIO, (code))
 
#ifndef MIN
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(_a, _b) ((_a) > (_b) ? (_a) : (_b))
#endif
 
struct hunt_nic *primary_nics = NULL;
 
struct hunt_nic {
        struct efx_nic efx;
 
        /* PHY information */
        unsigned int phy_cap_mask;
        unsigned int phy_cap;
        unsigned long link_poll_timer;
 
        /* resource housekeeping */
        uint64_t uc_filter_id;
        uint64_t mc_filter_id;
        u8 mac[ETH_ALEN];
 
        struct {
                /* Common payload for all MCDI requests */
                unsigned int seqno;
 
                size_t resp_hdr_len;
                size_t resp_data_len;
 
                struct io_buffer *iob;
                uint64_t dma_addr;
        } mcdi;
 
        struct hunt_nic *primary;
        struct hunt_nic *next_primary;
        u32 flags;
};
 
static int hunt_nic_is_primary(struct hunt_nic *hunt)
{
        return (hunt->flags & (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_PRIMARY));
}
 
/*******************************************************************************
 *
 *
 * MCDI transport
 *
 * This has been based on the implementation of MCDI in the common code driver.
 *
 *
 ******************************************************************************/
 
static int hunt_mcdi_init(struct hunt_nic *hunt)
{
        size_t max_msg_size;
        int rc;
 
        /* The MCDI message has two 32-bit headers (the MCDI header and the
         * MCDI v2 extended command) and then up to MCDI_CTL_SDU_LEN_MAX_V2
         * bytes of payload
         */
        max_msg_size = 2 * sizeof(efx_dword_t) + MCDI_CTL_SDU_LEN_MAX_V2;
 
        hunt->mcdi.iob = alloc_iob(max_msg_size);
        if (!hunt->mcdi.iob) {
                rc = -ENOMEM;
                return rc;
        }
        return 0;
}
 
static void hunt_mcdi_copyin(struct hunt_nic *hunt,
                             unsigned int cmd,
                             uint8_t *inbuf,
                             size_t inlen)
{
        efx_dword_t hdr[2];
        uint32_t seqno;
        unsigned int xflags;
        size_t hdr_len;
        u8 *pdu = hunt->mcdi.iob->data;
 
        seqno = hunt->mcdi.seqno & MCDI_SEQ_MASK;
 
        xflags = 0;
 
        EFX_POPULATE_DWORD_7(hdr[0],
                             MCDI_HEADER_CODE, MC_CMD_V2_EXTN,
                             MCDI_HEADER_RESYNC, 1,
                             MCDI_HEADER_DATALEN, 0,
                             MCDI_HEADER_SEQ, seqno,
                             MCDI_HEADER_ERROR, 0,
                             MCDI_HEADER_RESPONSE, 0,
                             MCDI_HEADER_XFLAGS, xflags);
        EFX_POPULATE_DWORD_2(hdr[1],
                             MC_CMD_V2_EXTN_IN_EXTENDED_CMD, cmd,
                             MC_CMD_V2_EXTN_IN_ACTUAL_LEN, inlen);
 
        hdr_len = sizeof(hdr);
 
        memcpy(pdu, &hdr, hdr_len);
        assert(inlen <= MCDI_CTL_SDU_LEN_MAX_V2);
        memcpy(pdu + hdr_len, inbuf, inlen);
 
        wmb();       /* Sync the data before ringing the doorbell */
 
        /* Ring the doorbell to post the command DMA address to the MC */
        hunt->mcdi.dma_addr = virt_to_bus(hunt->mcdi.iob->data);
 
        assert((hunt->mcdi.dma_addr & 0xFF) == 0);
 
        _efx_writel(&hunt->efx,
                   cpu_to_le32((u64)hunt->mcdi.dma_addr >> 32),
                   ER_DZ_MC_DB_LWRD);
 
        _efx_writel(&hunt->efx,
                   cpu_to_le32((u32)hunt->mcdi.dma_addr),
                   ER_DZ_MC_DB_HWRD);
}
 
static void hunt_mcdi_copyout(struct hunt_nic *hunt,
                              uint8_t *outbuf, size_t outlen)
{
        size_t offset;
        const u8 *pdu = hunt->mcdi.iob->data;
 
        offset =  hunt->mcdi.resp_hdr_len;
 
        if (outlen > 0)
                memcpy(outbuf, pdu+offset, outlen);
}
 
static int hunt_mcdi_request_poll(struct hunt_nic *hunt, bool quiet)
{
        unsigned int resplen, respseq, error;
        unsigned long finish;
        efx_dword_t errdword;
        efx_qword_t qword;
        const efx_dword_t *pdu = hunt->mcdi.iob->data;
        const u8 *pdu1 = hunt->mcdi.iob->data;
        int delay, rc;
 
        /* Spin for up to 5s, polling at intervals of 10us, 20us, ... ~100ms  */
        finish = currticks() + (5 * TICKS_PER_SEC);
        delay = 10;
        while (1) {
                udelay(delay);
 
                /* Check for an MCDI response */
                if (EFX_DWORD_FIELD(*pdu, MCDI_HEADER_RESPONSE))
                        break;
 
                if (currticks() >= finish)
                        return -ETIMEDOUT;
 
                if (delay < 100000)
                        delay *= 2;
        }
 
        memcpy(&qword, pdu1, 8);
 
        /* qword.dword[0] is the MCDI header; qword.dword[1] is the MCDI v2
         * extended command
         */
        respseq = EFX_DWORD_FIELD(qword.dword[0], MCDI_HEADER_SEQ);
        error = EFX_DWORD_FIELD(qword.dword[0], MCDI_HEADER_ERROR);
        resplen = EFX_DWORD_FIELD(qword.dword[1], MC_CMD_V2_EXTN_IN_ACTUAL_LEN);
 
        if (error && resplen == 0) {
                if (!quiet)
                        DBGC(hunt, "MC rebooted\n");
                return -EIO;
        } else if ((respseq ^ hunt->mcdi.seqno) & MCDI_SEQ_MASK) {
                if (!quiet)
                        DBGC(hunt, "MC response mismatch rxseq 0x%x txseq "
                             "0x%x\n", respseq, hunt->mcdi.seqno);
                return -EIO;
        } else if (error) {
                memcpy(&errdword, pdu1 + 8, 4);
                rc = EFX_DWORD_FIELD(errdword, EFX_DWORD_0);
                switch (rc) {
                case MC_CMD_ERR_ENOENT:
                        return -ENOENT;
                case MC_CMD_ERR_EINTR:
                        return -EINTR;
                case MC_CMD_ERR_EACCES:
                        return -EACCES;
                case MC_CMD_ERR_EBUSY:
                        return -EBUSY;
                case MC_CMD_ERR_EINVAL:
                        return -EINVAL;
                case MC_CMD_ERR_EDEADLK:
                        return -EDEADLK;
                case MC_CMD_ERR_ENOSYS:
                        return -ENOSYS;
                case MC_CMD_ERR_ETIME:
                        return -ETIME;
                case MC_CMD_ERR_EPERM:
                        return -EPERM;
                default:
                        /* Return the MC error in an I/O error. */
                        return EMCDI_IO(rc & 0xff);
                }
        }
        hunt->mcdi.resp_hdr_len = 8;
        hunt->mcdi.resp_data_len = resplen;
 
        return 0;
}
 
static void hunt_mcdi_fini(struct hunt_nic *hunt)
{
        free_iob(hunt->mcdi.iob);
}
 
int _hunt_mcdi(struct efx_nic *efx, unsigned int cmd,
               const efx_dword_t *inbuf, size_t inlen,
               efx_dword_t *outbuf, size_t outlen,
               size_t *outlen_actual, bool quiet)
{
        int rc;
        struct hunt_nic *hunt = (struct hunt_nic *) efx;
        size_t local_outlen_actual;
 
        if (outlen_actual == NULL)
                outlen_actual = &local_outlen_actual;
 
        ++hunt->mcdi.seqno;
        hunt_mcdi_copyin(hunt, cmd, (uint8_t *) inbuf, inlen);
 
        rc = hunt_mcdi_request_poll(hunt, quiet);
        if (rc != 0) {
                if (!quiet)
                        DBGC(hunt, "MC response to cmd 0x%x: %s\n",
                             cmd, strerror(rc));
                return rc;
        }
 
        *outlen_actual = hunt->mcdi.resp_data_len;
 
        hunt_mcdi_copyout(hunt, (uint8_t *) outbuf, outlen);
 
        return 0;
}
 
static int hunt_mcdi(struct hunt_nic *hunt, struct efx_mcdi_req_s *req)
{
        return _hunt_mcdi(&hunt->efx, req->emr_cmd,
                          (const efx_dword_t *) req->emr_in_buf,
                          req->emr_in_length,
                          (efx_dword_t *) req->emr_out_buf, req->emr_out_length,
                          &req->emr_out_length_used, false);
}
 
static int hunt_mcdi_quiet(struct hunt_nic *hunt, struct efx_mcdi_req_s *req)
{
        return _hunt_mcdi(&hunt->efx, req->emr_cmd,
                          (const efx_dword_t *) req->emr_in_buf,
                          req->emr_in_length,
                          (efx_dword_t *) req->emr_out_buf, req->emr_out_length,
                          &req->emr_out_length_used, true);
}
 
/*******************************************************************************
 *
 *
 * Hardware initialization
 *
 *
 ******************************************************************************/
static int hunt_get_workarounds(struct hunt_nic *hunt, uint32_t *implemented,
                                uint32_t *enabled)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_WORKAROUNDS_OUT_LEN);
        int rc;
 
        *implemented = *enabled = 0;
 
        req.emr_cmd = MC_CMD_GET_WORKAROUNDS;
        req.emr_in_buf = NULL;
        req.emr_in_length = 0;
        req.emr_out_buf = outbuf;
        req.emr_out_length = sizeof(outbuf);
 
        rc = hunt_mcdi(hunt, &req);
 
        if (rc)
                return rc;
 
        if (req.emr_out_length_used < MC_CMD_GET_WORKAROUNDS_OUT_LEN)
                return -EMSGSIZE;
 
        *implemented = MCDI_DWORD(outbuf, GET_WORKAROUNDS_OUT_IMPLEMENTED);
        *enabled = MCDI_DWORD(outbuf, GET_WORKAROUNDS_OUT_ENABLED);
        return 0;
}
 
static int hunt_enable_workaround_35388(struct hunt_nic *hunt)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(payload, MC_CMD_WORKAROUND_IN_LEN);
 
        req.emr_cmd = MC_CMD_WORKAROUND;
        req.emr_in_buf = payload;
        req.emr_in_length = MC_CMD_WORKAROUND_IN_LEN;
        req.emr_out_buf = NULL;
        req.emr_out_length = 0;
 
        MCDI_SET_DWORD(req.emr_in_buf, WORKAROUND_IN_TYPE,
                       MC_CMD_WORKAROUND_BUG35388);
        MCDI_SET_DWORD(req.emr_in_buf, WORKAROUND_IN_ENABLED, 1);
 
        /* If the firmware doesn't support this workaround, hunt_mcdi() will
         * return -EINVAL from hunt_mcdi_request_poll().
         */
        return hunt_mcdi(hunt, &req);
}
 
static int hunt_workaround_35388(struct hunt_nic *hunt)
{
        uint32_t implemented, enabled;
        int rc = hunt_get_workarounds(hunt, &implemented, &enabled);
 
        if (rc < 0)
                return 0;
        if (!(implemented & MC_CMD_GET_WORKAROUNDS_OUT_BUG35388))
                return 0;
        if (enabled & MC_CMD_GET_WORKAROUNDS_OUT_BUG35388)
                return 1;
 
        rc = hunt_enable_workaround_35388(hunt);
        if (rc == 0)
                return 1; /* Workaround is enabled */
        else
                return 0;
}
 
static int hunt_get_port_assignment(struct hunt_nic *hunt)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PORT_ASSIGNMENT_OUT_LEN);
        int rc;
 
        req.emr_cmd = MC_CMD_GET_PORT_ASSIGNMENT;
        req.emr_in_buf = NULL;
        req.emr_in_length = 0;
        req.emr_out_buf = outbuf;
        req.emr_out_length = sizeof(outbuf);
 
        rc = hunt_mcdi(hunt, &req);
        if (rc != 0)
                return rc;
 
        hunt->efx.port = MCDI_DWORD(req.emr_out_buf,
                                    GET_PORT_ASSIGNMENT_OUT_PORT);
        return 0;
}
 
static int hunt_mac_addr(struct hunt_nic *hunt, uint8_t *ll_addr)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_MAC_ADDRESSES_OUT_LEN);
        int rc;
 
        req.emr_cmd = MC_CMD_GET_MAC_ADDRESSES;
        req.emr_in_buf = NULL;
        req.emr_in_length = 0;
        req.emr_out_buf = outbuf;
        req.emr_out_length = MC_CMD_GET_MAC_ADDRESSES_OUT_LEN;
 
        rc = hunt_mcdi(hunt, &req);
        if (rc != 0)
                return rc;
 
        if (req.emr_out_length_used < MC_CMD_GET_MAC_ADDRESSES_OUT_LEN)
                return -EMSGSIZE;
 
        memcpy(ll_addr,
               MCDI_PTR(req.emr_out_buf, GET_MAC_ADDRESSES_OUT_MAC_ADDR_BASE),
               ETH_ALEN);
 
        return 0;
}
 
static int hunt_get_phy_cfg(struct hunt_nic *hunt)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_CFG_OUT_LEN);
        int rc;
 
        req.emr_cmd = MC_CMD_GET_PHY_CFG;
        req.emr_in_buf = NULL;
        req.emr_in_length = 0;
        req.emr_out_buf = outbuf;
        req.emr_out_length = sizeof(outbuf);
 
        rc = hunt_mcdi(hunt, &req);
        if (rc != 0)
                return rc;
 
        if (req.emr_out_length_used < MC_CMD_GET_PHY_CFG_OUT_LEN)
                return -EMSGSIZE;
 
        hunt->phy_cap_mask = hunt->phy_cap =
                MCDI_DWORD(req.emr_out_buf, GET_PHY_CFG_OUT_SUPPORTED_CAP);
        DBGC2(hunt, "GET_PHY_CFG: flags=%x, caps=%x\n", rc, hunt->phy_cap);
        return 0;
}
 
static int hunt_driver_attach(struct hunt_nic *hunt, int attach)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(inbuf, MC_CMD_DRV_ATTACH_IN_LEN);
        MCDI_DECLARE_BUF(outbuf, MC_CMD_DRV_ATTACH_EXT_OUT_LEN);
        int rc;
 
        req.emr_cmd = MC_CMD_DRV_ATTACH;
        req.emr_in_buf = inbuf;
        req.emr_in_length = sizeof(inbuf);
        req.emr_out_buf = outbuf;
        req.emr_out_length = sizeof(outbuf);
 
        /* Set the PREBOOT flag to indicate later instances of attach should
         * force an ENTITY RESET
         */
        if (attach)
                attach |= 1 << MC_CMD_DRV_PREBOOT_LBN;
 
        MCDI_SET_DWORD(req.emr_in_buf, DRV_ATTACH_IN_NEW_STATE, attach);
        MCDI_SET_DWORD(req.emr_in_buf, DRV_ATTACH_IN_UPDATE, 1);
        MCDI_SET_DWORD(req.emr_in_buf, DRV_ATTACH_IN_FIRMWARE_ID,
                       MC_CMD_FW_DONT_CARE);
 
        rc = hunt_mcdi(hunt, &req);
        if (rc != 0)
                return rc;
 
        if (req.emr_out_length_used < MC_CMD_DRV_ATTACH_OUT_LEN)
                return -EMSGSIZE;
 
        hunt->flags = MCDI_DWORD(outbuf, DRV_ATTACH_EXT_OUT_FUNC_FLAGS);
 
        return 0;
}
 
static int hunt_reset(struct hunt_nic *hunt)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(inbuf, MC_CMD_ENTITY_RESET_IN_LEN);
 
        req.emr_cmd = MC_CMD_ENTITY_RESET;
        req.emr_in_buf = inbuf;
        req.emr_in_length = sizeof(inbuf);
        req.emr_out_buf = NULL;
        req.emr_out_length = 0;
 
        MCDI_POPULATE_DWORD_1(req.emr_in_buf, ENTITY_RESET_IN_FLAG,
                              ENTITY_RESET_IN_FUNCTION_RESOURCE_RESET, 1);
        return hunt_mcdi(hunt, &req);
}
 
static void hunt_clear_udp_tunnel_ports(struct hunt_nic *hunt)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_TUNNEL_ENCAP_UDP_PORTS_IN_LENMAX);
        MCDI_DECLARE_BUF(outbuf, MC_CMD_SET_TUNNEL_ENCAP_UDP_PORTS_OUT_LEN);
        struct efx_mcdi_req_s req;
        int rc;
 
        memset(inbuf, 0, MC_CMD_SET_TUNNEL_ENCAP_UDP_PORTS_IN_LENMAX);
        MCDI_SET_DWORD(inbuf, SET_TUNNEL_ENCAP_UDP_PORTS_IN_FLAGS,
                (1 << MC_CMD_SET_TUNNEL_ENCAP_UDP_PORTS_IN_UNLOADING_LBN));
 
        req.emr_cmd = MC_CMD_SET_TUNNEL_ENCAP_UDP_PORTS;
        req.emr_in_buf = inbuf;
        req.emr_in_length = sizeof(inbuf);
        req.emr_out_buf = outbuf;
        req.emr_out_length = sizeof(outbuf);
 
        rc = hunt_mcdi_quiet(hunt, &req);
        if (rc)
                return;
 
        if (MCDI_DWORD(outbuf, SET_TUNNEL_ENCAP_UDP_PORTS_OUT_FLAGS) &
            (1 << MC_CMD_SET_TUNNEL_ENCAP_UDP_PORTS_OUT_RESETTING_LBN)) {
                DBGC(hunt,
                     "Rebooting MC due to clearing UDP tunnel port list\n");
                /* Delay for the MC reboot to complete. */
                mdelay(100);
        }
}
 
static int hunt_set_mac(struct hunt_nic *hunt)
{
        struct net_device *netdev = hunt->efx.netdev;
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(payload, MC_CMD_SET_MAC_IN_LEN);
        unsigned int fcntl;
        int rc;
 
        req.emr_cmd = MC_CMD_SET_MAC;
        req.emr_in_buf = payload;
        req.emr_in_length = MC_CMD_SET_MAC_IN_LEN;
        req.emr_out_buf = NULL;
        req.emr_out_length = 0;
 
        MCDI_SET_DWORD(req.emr_in_buf, SET_MAC_IN_MTU,
                       EFX_MAC_FRAME_LEN(ETH_FRAME_LEN));
        MCDI_SET_DWORD(req.emr_in_buf, SET_MAC_IN_DRAIN, 0);
        memcpy(MCDI_PTR(req.emr_in_buf, SET_MAC_IN_ADDR),
               netdev->ll_addr, ETH_ALEN);
        MCDI_SET_DWORD(req.emr_in_buf, SET_MAC_IN_REJECT, 0);
 
        /* If the PHY supports autnegotiation, then configure the MAC to match
         * the negotiated settings. Otherwise force the MAC to TX and RX flow
         * control.
         */
        if (hunt->phy_cap_mask & (1 << MC_CMD_PHY_CAP_AN_LBN))
                fcntl = MC_CMD_FCNTL_AUTO;
        else
                fcntl = MC_CMD_FCNTL_BIDIR;
        MCDI_SET_DWORD(req.emr_in_buf, SET_MAC_IN_FCNTL, fcntl);
 
        rc = hunt_mcdi(hunt, &req);
        /* Ignore failure for permissions reasons */
        if (rc == -EPERM)
                rc = 0;
        return rc;
}
 
static int hunt_alloc_vis(struct hunt_nic *hunt)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(inbuf, MC_CMD_ALLOC_VIS_IN_LEN);
 
        req.emr_cmd = MC_CMD_ALLOC_VIS;
        req.emr_in_buf = inbuf;
        req.emr_in_length = sizeof(inbuf);
        req.emr_out_buf = NULL;
        req.emr_out_length = 0;
 
        MCDI_SET_DWORD(req.emr_in_buf, ALLOC_VIS_IN_MIN_VI_COUNT, 1);
        MCDI_SET_DWORD(req.emr_in_buf, ALLOC_VIS_IN_MAX_VI_COUNT, 1);
 
        return hunt_mcdi(hunt, &req);
}
 
static void hunt_free_vis(struct hunt_nic *hunt)
{
        struct efx_mcdi_req_s req;
        int rc;
 
        req.emr_cmd = MC_CMD_FREE_VIS;
        req.emr_in_buf = NULL;
        req.emr_in_length = 0;
        req.emr_out_buf = NULL;
        req.emr_out_length = 0;
 
        rc = hunt_mcdi(hunt, &req);
        if (rc != 0)
                DBGC(hunt, "MC_CMD_FREE_VIS Failed\n");
}
 
/*******************************************************************************
 *
 *
 * Link state handling
 *
 *
 ******************************************************************************/
static int hunt_check_link(struct hunt_nic *hunt)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
        unsigned int flags, speed;
        bool up;
        int rc;
        static bool link_state = false;
 
        req.emr_cmd = MC_CMD_GET_LINK;
        req.emr_in_buf = NULL;
        req.emr_in_length = 0;
        req.emr_out_buf = outbuf;
        req.emr_out_length = sizeof(outbuf);
 
        rc = hunt_mcdi(hunt, &req);
        if (rc != 0)
                return rc;
 
        if (req.emr_out_length_used < MC_CMD_GET_LINK_OUT_LEN)
                return -EMSGSIZE;
 
        flags = MCDI_DWORD(req.emr_out_buf, GET_LINK_OUT_FLAGS);
        up = !!(flags & (1 << MC_CMD_GET_LINK_OUT_LINK_UP_LBN));
        speed = MCDI_DWORD(req.emr_out_buf, GET_LINK_OUT_LINK_SPEED);
 
        /* Set netdev_link_*() based on the link status from the MC */
        if (up && speed)
                netdev_link_up(hunt->efx.netdev);
        else
                netdev_link_down(hunt->efx.netdev);
 
        if (up != link_state) {
                DBGC(hunt, "Link %s, flags=%x, our caps=%x, lpa=%x, speed=%d, fcntl=%x, mac_fault=%x\n",
                     (up? "up": "down"), flags,
                     MCDI_DWORD(req.emr_out_buf, GET_LINK_OUT_CAP),
                     MCDI_DWORD(req.emr_out_buf, GET_LINK_OUT_LP_CAP),
                     speed,
                     MCDI_DWORD(req.emr_out_buf, GET_LINK_OUT_FCNTL),
                     MCDI_DWORD(req.emr_out_buf, GET_LINK_OUT_MAC_FAULT));
                link_state = up;
        }
 
        return 0;
}
 
#define MCDI_PORT_SPEED_CAPS   ((1 << MC_CMD_PHY_CAP_10HDX_LBN) | \
                                (1 << MC_CMD_PHY_CAP_10FDX_LBN) | \
                                (1 << MC_CMD_PHY_CAP_100HDX_LBN) | \
                                (1 << MC_CMD_PHY_CAP_100FDX_LBN) | \
                                (1 << MC_CMD_PHY_CAP_1000HDX_LBN) | \
                                (1 << MC_CMD_PHY_CAP_1000FDX_LBN) | \
                                (1 << MC_CMD_PHY_CAP_10000FDX_LBN) | \
                                (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
 
/*******************************************************************************
 *
 *
 * TX
 *
 *
 ******************************************************************************/
static int
hunt_tx_init(struct net_device *netdev, struct hunt_nic *hunt)
{
        struct efx_mcdi_req_s req;
        dma_addr_t dma_addr;
        efx_qword_t *addr;
        MCDI_DECLARE_BUF(inbuf,
                         MC_CMD_INIT_TXQ_IN_LEN(EFX_TXQ_NBUFS(EFX_TXD_SIZE)));
        int rc, npages;
 
        rc = efx_hunt_tx_init(netdev, &dma_addr);
        if (rc != 0)
                return rc;
 
        npages = EFX_TXQ_NBUFS(EFX_TXD_SIZE);
 
        req.emr_cmd = MC_CMD_INIT_TXQ;
        req.emr_in_buf = inbuf;
        req.emr_in_length = MC_CMD_INIT_TXQ_IN_LEN(npages);
        req.emr_out_buf = NULL;
        req.emr_out_length = 0;
 
        MCDI_SET_DWORD(req.emr_in_buf, INIT_TXQ_IN_SIZE, EFX_TXD_SIZE);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_TXQ_IN_TARGET_EVQ, 0);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_TXQ_IN_LABEL, 0);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_TXQ_IN_INSTANCE, 0);
 
        MCDI_POPULATE_DWORD_6(req.emr_in_buf, INIT_TXQ_IN_FLAGS,
                              INIT_TXQ_IN_FLAG_BUFF_MODE, 0,
                              INIT_TXQ_IN_FLAG_IP_CSUM_DIS, 1,
                              INIT_TXQ_IN_FLAG_TCP_CSUM_DIS, 1,
                              INIT_TXQ_IN_FLAG_TCP_UDP_ONLY, 0,
                              INIT_TXQ_IN_CRC_MODE, 0,
                              INIT_TXQ_IN_FLAG_TIMESTAMP, 0);
 
        MCDI_SET_DWORD(req.emr_in_buf, INIT_TXQ_IN_OWNER_ID, 0);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_TXQ_IN_PORT_ID,
                       EVB_PORT_ID_ASSIGNED);
 
        addr = (efx_qword_t *) MCDI_PTR(req.emr_in_buf, INIT_TXQ_IN_DMA_ADDR);
 
        EFX_POPULATE_QWORD_2(*addr,
                             EFX_DWORD_1, (uint32_t)(dma_addr >> 32),
                             EFX_DWORD_0, (uint32_t)(dma_addr & 0xffffffff));
 
        return hunt_mcdi(hunt, &req);
}
 
static void hunt_tx_fini(struct hunt_nic *hunt)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(inbuf, MC_CMD_FINI_TXQ_IN_LEN);
        struct efx_nic *efx = &hunt->efx;
        struct efx_tx_queue *txq = &efx->txq;
        int rc;
 
        req.emr_cmd = MC_CMD_FINI_TXQ;
        req.emr_in_buf = inbuf;
        req.emr_in_length = sizeof(inbuf);
        req.emr_out_buf = NULL;
        req.emr_out_length = 0;
 
        MCDI_SET_DWORD(req.emr_in_buf, FINI_TXQ_IN_INSTANCE, 0);
 
        rc = hunt_mcdi(hunt, &req);
        if (rc != 0)
                DBGC(hunt, "MC_CMD_FINI_TXQ Failed\n");
 
        efx_hunt_free_special_buffer(txq->ring,
                                     sizeof(efx_tx_desc_t) * EFX_TXD_SIZE);
        txq->ring = NULL;
}
 
/*******************************************************************************
 *
 *
 * RX
 *
 *
 ******************************************************************************/
static int hunt_rx_filter_insert(struct net_device *netdev,
                                 struct hunt_nic *hunt,
                                 int multicast)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(inbuf, MC_CMD_FILTER_OP_IN_LEN);
        MCDI_DECLARE_BUF(outbuf, MC_CMD_FILTER_OP_OUT_LEN);
        int rc;
        uint64_t filter_id;
        (void) netdev;
 
        req.emr_cmd = MC_CMD_FILTER_OP;
        req.emr_in_buf = inbuf;
        req.emr_in_length = sizeof(inbuf);
        req.emr_out_buf = outbuf;
        req.emr_out_length = sizeof(outbuf);
 
        MCDI_SET_DWORD(req.emr_in_buf, FILTER_OP_IN_OP,
                       multicast ? MC_CMD_FILTER_OP_IN_OP_SUBSCRIBE
                                 : MC_CMD_FILTER_OP_IN_OP_INSERT);
        MCDI_POPULATE_DWORD_1(req.emr_in_buf, FILTER_OP_IN_MATCH_FIELDS,
                              FILTER_OP_IN_MATCH_DST_MAC, 1);
        if (multicast)
                memset(MCDI_PTR(req.emr_in_buf, FILTER_OP_IN_DST_MAC),
                       0xff, ETH_ALEN);
        else
                memcpy(MCDI_PTR(req.emr_in_buf, FILTER_OP_IN_DST_MAC),
                       hunt->mac, ETH_ALEN);
 
        MCDI_SET_DWORD(req.emr_in_buf, FILTER_OP_IN_PORT_ID,
                       EVB_PORT_ID_ASSIGNED);
        MCDI_SET_DWORD(req.emr_in_buf, FILTER_OP_IN_RX_DEST,
                        MC_CMD_FILTER_OP_IN_RX_DEST_HOST);
        MCDI_SET_DWORD(req.emr_in_buf, FILTER_OP_IN_RX_QUEUE, 0);
        MCDI_SET_DWORD(req.emr_in_buf, FILTER_OP_IN_RX_MODE, 0);
        MCDI_SET_DWORD(req.emr_in_buf, FILTER_OP_IN_TX_DEST,
                       MC_CMD_FILTER_OP_IN_TX_DEST_DEFAULT);
 
        rc = hunt_mcdi(hunt, &req);
        if (rc != 0)
                return rc;
 
        if (req.emr_out_length_used <  MC_CMD_FILTER_OP_OUT_LEN)
                return -EIO;
 
        filter_id = MCDI_QWORD(req.emr_out_buf, FILTER_OP_OUT_HANDLE);
        if (multicast)
                hunt->mc_filter_id = filter_id;
        else
                hunt->uc_filter_id = filter_id;
 
        return 0;
}
 
static int hunt_rx_filter_remove(struct hunt_nic *hunt,
                                 int multicast)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(inbuf, MC_CMD_FILTER_OP_IN_LEN);
 
        req.emr_cmd = MC_CMD_FILTER_OP;
        req.emr_in_buf = inbuf;
        req.emr_in_length = sizeof(inbuf);
        req.emr_out_buf = NULL;
        req.emr_out_length = 0;
 
        MCDI_SET_DWORD(req.emr_in_buf, FILTER_OP_IN_OP,
                       multicast ? MC_CMD_FILTER_OP_IN_OP_UNSUBSCRIBE :
                       MC_CMD_FILTER_OP_IN_OP_REMOVE);
        MCDI_SET_QWORD(req.emr_in_buf, FILTER_OP_IN_HANDLE,
                          multicast ? hunt->mc_filter_id :
                                      hunt->uc_filter_id);
        return hunt_mcdi(hunt, &req);
}
 
static int hunt_get_mac(struct hunt_nic *hunt)
{
        struct efx_mcdi_req_s req;
        MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_MAC_ADDRESSES_OUT_LEN);
        int rc;
 
        req.emr_cmd = MC_CMD_GET_MAC_ADDRESSES;
        req.emr_in_buf = NULL;
        req.emr_in_length = 0;
        req.emr_out_buf = outbuf;
        req.emr_out_length = sizeof(outbuf);
 
        rc = hunt_mcdi(hunt, &req);
        if (rc != 0)
                return rc;
 
        if (req.emr_out_length_used < MC_CMD_INIT_EVQ_OUT_LEN)
                return -EMSGSIZE;
 
        memcpy(hunt->mac, MCDI_PTR(outbuf, GET_MAC_ADDRESSES_OUT_MAC_ADDR_BASE),
               ETH_ALEN);
        return 0;
}
 
static int hunt_rx_filter_init(struct net_device *netdev,
                               struct hunt_nic *hunt)
{
        int rc = hunt_get_mac(hunt);
 
        if (rc != 0)
                return rc;
 
        rc = hunt_rx_filter_insert(netdev, hunt, 0);
        if (rc != 0)
                return rc;
 
        rc = hunt_rx_filter_insert(netdev, hunt, 1);
        if (rc != 0)
                hunt_rx_filter_remove(hunt, 0);
 
        return rc;
}
 
static int
hunt_rx_init(struct net_device *netdev,
             struct hunt_nic *hunt)
{
        struct efx_mcdi_req_s req;
        dma_addr_t dma_addr;
        efx_qword_t *addr;
        MCDI_DECLARE_BUF(inbuf,
                         MC_CMD_INIT_RXQ_IN_LEN(EFX_RXQ_NBUFS(EFX_RXD_SIZE)));
        int rc, npages;
 
        rc = efx_hunt_rx_init(netdev, &dma_addr);
        if (rc != 0)
                return rc;
 
        npages = EFX_RXQ_NBUFS(EFX_RXD_SIZE);
 
        req.emr_cmd = MC_CMD_INIT_RXQ;
        req.emr_in_buf = inbuf;
        req.emr_in_length = MC_CMD_INIT_RXQ_IN_LEN(npages);
        req.emr_out_buf = NULL;
        req.emr_out_length = 0;
 
        MCDI_SET_DWORD(req.emr_in_buf, INIT_RXQ_IN_SIZE, EFX_RXD_SIZE);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_RXQ_IN_TARGET_EVQ, 0);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_RXQ_IN_LABEL, 0);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_RXQ_IN_INSTANCE, 0);
        MCDI_POPULATE_DWORD_5(req.emr_in_buf, INIT_RXQ_IN_FLAGS,
                                 INIT_RXQ_IN_FLAG_BUFF_MODE, 0,
                                 INIT_RXQ_IN_FLAG_HDR_SPLIT, 0,
                                 INIT_RXQ_IN_FLAG_TIMESTAMP, 0,
                                 INIT_RXQ_IN_CRC_MODE, 0,
                                 INIT_RXQ_IN_FLAG_PREFIX, 1);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_RXQ_IN_OWNER_ID, 0);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_RXQ_IN_PORT_ID,
                       EVB_PORT_ID_ASSIGNED);
 
        addr = (efx_qword_t *) MCDI_PTR(req.emr_in_buf, INIT_RXQ_IN_DMA_ADDR);
 
        EFX_POPULATE_QWORD_2(*addr,
                             EFX_DWORD_1, (uint32_t)(dma_addr >> 32),
                             EFX_DWORD_0, (uint32_t)(dma_addr & 0xffffffff));
        return hunt_mcdi(hunt, &req);
}
 
static void hunt_rx_filter_fini(struct hunt_nic *hunt)
{
        hunt_rx_filter_remove(hunt, 0);
        hunt_rx_filter_remove(hunt, 1);
}
 
static void hunt_rx_fini(struct hunt_nic *hunt)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_FINI_RXQ_IN_LEN);
        struct efx_mcdi_req_s req;
        struct efx_nic *efx = &hunt->efx;
        struct efx_rx_queue *rxq = &efx->rxq;
        int rc;
 
        req.emr_cmd = MC_CMD_FINI_RXQ;
        req.emr_in_buf = inbuf;
        req.emr_in_length = MC_CMD_FINI_RXQ_IN_LEN;
        req.emr_out_buf = NULL;
        req.emr_out_length = 0;
 
        MCDI_SET_DWORD(req.emr_in_buf, FINI_RXQ_IN_INSTANCE, 0);
 
        rc = hunt_mcdi(hunt, &req);
        if (rc != 0)
                DBGC(hunt, "MC_CMD_FINI_RXQ Failed\n");
 
        efx_hunt_free_special_buffer(rxq->ring,
                                     sizeof(efx_rx_desc_t) * EFX_RXD_SIZE);
        rxq->ring = NULL;
}
 
/*******************************************************************************
 *
 *
 * Event queues and interrupts
 *
 *
 ******************************************************************************/
static int
hunt_ev_init(struct net_device *netdev,
             struct hunt_nic *hunt)
{
        struct efx_mcdi_req_s req;
        dma_addr_t dma_addr;
        efx_qword_t *addr;
        MCDI_DECLARE_BUF(inbuf,
                         MC_CMD_INIT_EVQ_IN_LEN(EFX_EVQ_NBUFS(EFX_EVQ_SIZE)));
        MCDI_DECLARE_BUF(outbuf, MC_CMD_INIT_EVQ_OUT_LEN);
        int rc, npages;
 
        rc = efx_hunt_ev_init(netdev, &dma_addr);
        if (rc != 0)
                return rc;
 
        npages = EFX_EVQ_NBUFS(EFX_EVQ_SIZE);
 
        req.emr_cmd = MC_CMD_INIT_EVQ;
        req.emr_in_buf = inbuf;
        req.emr_in_length = MC_CMD_INIT_EVQ_IN_LEN(npages);
        req.emr_out_buf = outbuf;
        req.emr_out_length = sizeof(outbuf);
 
        MCDI_SET_DWORD(req.emr_in_buf, INIT_EVQ_IN_SIZE, EFX_EVQ_SIZE);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_EVQ_IN_INSTANCE, 0);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_EVQ_IN_IRQ_NUM, 0);
 
        MCDI_POPULATE_DWORD_6(req.emr_in_buf, INIT_EVQ_IN_FLAGS,
                                 INIT_EVQ_IN_FLAG_INTERRUPTING, 1,
                                 INIT_EVQ_IN_FLAG_RPTR_DOS, 0,
                                 INIT_EVQ_IN_FLAG_INT_ARMD, 0,
                                 INIT_EVQ_IN_FLAG_CUT_THRU, 0,
                                 INIT_EVQ_IN_FLAG_RX_MERGE, 0,
                                 INIT_EVQ_IN_FLAG_TX_MERGE, 0);
 
        MCDI_SET_DWORD(req.emr_in_buf, INIT_EVQ_IN_TMR_MODE,
                          MC_CMD_INIT_EVQ_IN_TMR_MODE_DIS);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_EVQ_IN_TMR_LOAD, 0);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_EVQ_IN_TMR_RELOAD, 0);
 
        MCDI_SET_DWORD(req.emr_in_buf, INIT_EVQ_IN_COUNT_MODE,
                          MC_CMD_INIT_EVQ_IN_COUNT_MODE_DIS);
        MCDI_SET_DWORD(req.emr_in_buf, INIT_EVQ_IN_COUNT_THRSHLD, 0);
 
        addr = (efx_qword_t *) MCDI_PTR(req.emr_in_buf, INIT_EVQ_IN_DMA_ADDR);
 
        EFX_POPULATE_QWORD_2(*addr,
                             EFX_DWORD_1, (uint32_t)(dma_addr >> 32),
                             EFX_DWORD_0, (uint32_t)(dma_addr & 0xffffffff));
        rc = hunt_mcdi(hunt, &req);
        if (rc != 0)
                return rc;
 
        if (req.emr_out_length_used < MC_CMD_INIT_EVQ_OUT_LEN)
                return -EMSGSIZE;
 
        return 0;
}
 
static void hunt_ev_fini(struct hunt_nic *hunt)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_FINI_EVQ_IN_LEN);
        struct efx_mcdi_req_s req;
        struct efx_nic *efx = &hunt->efx;
        struct efx_ev_queue *evq = &efx->evq;
        int rc;
 
        req.emr_cmd = MC_CMD_FINI_EVQ;
        req.emr_in_buf = inbuf;
        req.emr_in_length = sizeof(inbuf);
        req.emr_out_buf = NULL;
        req.emr_out_length = 0;
 
        MCDI_SET_DWORD(req.emr_in_buf, FINI_EVQ_IN_INSTANCE, 0);
 
        rc = hunt_mcdi(hunt, &req);
        if (rc != 0)
                DBGC(hunt, "MC_CMD_FINI_EVQ Failed\n");
 
        efx_hunt_free_special_buffer(evq->ring,
                                     sizeof(efx_event_t) * EFX_EVQ_SIZE);
        evq->ring = NULL;
}
 
static void
hunt_poll(struct net_device *netdev)
{
        struct hunt_nic *hunt = netdev->priv;
 
        /* If called while already polling, return immediately */
        if (hunt->efx.state & EFX_STATE_POLLING)
                return;
        hunt->efx.state |= EFX_STATE_POLLING;
 
        /* Poll link state */
        if (hunt->link_poll_timer + TICKS_PER_SEC < currticks()) {
                hunt->link_poll_timer = currticks();
                hunt_check_link(hunt);
        }
 
        /* Poll data path */
        efx_hunt_poll(netdev);
 
        hunt->efx.state &= ~EFX_STATE_POLLING;
}
 
/*******************************************************************************
 *
 *
 * Netdevice operations
 *
 *
 ******************************************************************************/
static int hunt_open(struct net_device *netdev)
{
        struct hunt_nic *hunt = netdev->priv;
        int rc;
 
        /* Allocate VIs */
        rc = hunt_alloc_vis(hunt);
        if (rc != 0)
                goto fail2;
 
        /* Initialize data path */
        rc = hunt_ev_init(netdev, hunt);
        if (rc != 0)
                goto fail3;
 
        rc = hunt_rx_init(netdev, hunt);
        if (rc != 0)
                goto fail4;
 
        rc = hunt_rx_filter_init(netdev, hunt);
        if (rc != 0)
                goto fail5;
 
        rc = hunt_tx_init(netdev, hunt);
        if (rc != 0)
                goto fail6;
 
        rc = efx_hunt_open(netdev);
        if (rc)
                goto fail7;
 
        rc = hunt_set_mac(hunt);
        if (rc)
                goto fail8;
 
        /* Mark the link as down before checking the link state because the
         * latter might fail.
         */
        netdev_link_down(netdev);
        hunt_check_link(hunt);
 
        DBGC2(hunt, "%s: open ok\n", netdev->name);
        return 0;
 
fail8:
        efx_hunt_close(netdev);
fail7:
        hunt_tx_fini(hunt);
fail6:
        hunt_rx_filter_fini(hunt);
fail5:
        hunt_rx_fini(hunt);
fail4:
        hunt_ev_fini(hunt);
fail3:
        hunt_free_vis(hunt);
fail2:
        DBGC2(hunt, "%s: %s\n", netdev->name, strerror(rc));
        return rc;
}
 
 
static void hunt_close(struct net_device *netdev)
{
        struct hunt_nic *hunt = netdev->priv;
 
        /* Stop datapath */
        efx_hunt_close(netdev);
 
        hunt_tx_fini(hunt);
        hunt_rx_fini(hunt);
        hunt_rx_filter_fini(hunt);
        hunt_ev_fini(hunt);
 
        hunt_free_vis(hunt);
 
        /* Reset hardware and detach */
        hunt_reset(hunt);
}
 
 
/*******************************************************************************
 *
 *
 * Public operations
 *
 *
 ******************************************************************************/
 
static struct net_device_operations hunt_operations = {
        .open                  = hunt_open,
        .close                 = hunt_close,
        .transmit              = efx_hunt_transmit,
        .poll                  = hunt_poll,
        .irq                   = efx_hunt_irq,
};
 
static int
hunt_probe(struct pci_device *pci)
{
        struct net_device *netdev;
        struct hunt_nic *hunt;
        struct efx_nic *efx;
        int rc = 0;
 
        /* Create the network adapter */
        netdev = alloc_etherdev(sizeof(struct hunt_nic));
        if (!netdev) {
                rc = -ENOMEM;
                goto fail1;
        }
 
        /* Initialise the network adapter, and initialise private storage */
        netdev_init(netdev, &hunt_operations);
        pci_set_drvdata(pci, netdev);
        netdev->dev = &pci->dev;
        netdev->state |= NETDEV_IRQ_UNSUPPORTED;
 
        hunt = netdev->priv;
        memset(hunt, 0, sizeof(*hunt));
        efx = &hunt->efx;
 
        efx->type = &hunt_nic_type;
 
        /* Initialise efx datapath */
        efx_probe(netdev, EFX_HUNTINGTON);
 
        /* Initialise MCDI.  In case we are recovering from a crash, first
         * cancel any outstanding request by sending a special message using the
         * least significant bits of the 'high' (doorbell) register.
         */
        _efx_writel(efx, cpu_to_le32(1), ER_DZ_MC_DB_HWRD);
        rc = hunt_mcdi_init(hunt);
        if (rc != 0)
                goto fail2;
 
        /* Reset (most) configuration for this function */
        rc = hunt_reset(hunt);
        if (rc != 0)
                goto fail3;
 
        /* Medford has a list of UDP tunnel ports that is populated by the
         * driver. Avoid dropping any unencapsulated packets. This may cause
         * an MC reboot.
         */
        hunt_clear_udp_tunnel_ports(hunt);
 
        /* Enable the workaround for bug35388, if supported */
        efx->workaround_35388 = hunt_workaround_35388(hunt);
 
        /* Set the RX packet prefix size */
        efx->rx_prefix_size = ES_DZ_RX_PREFIX_SIZE;
 
        rc = hunt_get_port_assignment(hunt);
        if (rc != 0)
                goto fail3;
 
        rc = hunt_mac_addr(hunt, netdev->ll_addr);
        if (rc != 0)
                goto fail4;
 
        rc = hunt_get_phy_cfg(hunt);
        if (rc != 0)
                goto fail5;
 
        rc = hunt_driver_attach(hunt, 1);
        if (rc != 0)
                goto fail5;
 
        /* If not exposing this network device, return successfully here */
        if (hunt->flags & (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_NO_ACTIVE_PORT))
                return 0;
 
        if (hunt_nic_is_primary(hunt)) {
                hunt->next_primary = primary_nics;
                primary_nics = hunt;
                hunt->primary = hunt;
        } else {
                struct hunt_nic *other_hunt = primary_nics;
 
                while (other_hunt && !hunt->primary) {
                        struct pci_device *other_pci = (struct pci_device *)
                                other_hunt->efx.netdev->dev;
                        /* Check if the seg:bus:dev parts match. */
                        if (PCI_FIRST_FUNC(other_pci->busdevfn) ==
                            PCI_FIRST_FUNC(pci->busdevfn))
                                hunt->primary = other_hunt;
 
                        other_hunt = other_hunt->next_primary;
                }
                if (!hunt->primary) {
                        rc = -EIO;
                        goto fail6;
                }
        }
 
        rc = register_netdev(netdev);
        if (rc != 0)
                goto fail8;
 
        DBG2("%s " PCI_FMT " ok\n", __func__, PCI_ARGS(pci));
        return 0;
 
fail8:
fail6:
        (void) hunt_driver_attach(hunt, 0);
fail5:
fail4:
fail3:
        hunt_mcdi_fini(hunt);
fail2:
        efx_remove(netdev);
        netdev_put(netdev);
fail1:
        DBG2("%s " PCI_FMT " rc=%d\n", __func__, PCI_ARGS(pci), rc);
        return rc;
}
 
static void hunt_remove(struct pci_device *pci)
{
        struct net_device *netdev = pci_get_drvdata(pci);
        struct hunt_nic *hunt = netdev->priv;
 
        if (!(hunt->flags &
              (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_NO_ACTIVE_PORT))) {
                /* The netdevice might still be open, so unregister it now
                 * before ripping stuff out from underneath.
                 */
                unregister_netdev(netdev);
        }
 
        (void)hunt_driver_attach(hunt, 0);
        hunt_mcdi_fini(hunt);
 
        /* Destroy data path */
        efx_remove(netdev);
 
        netdev_nullify(netdev);
        netdev_put(netdev);
}
 
const struct efx_nic_type hunt_nic_type = {
        .mcdi_rpc = _hunt_mcdi,
};
 
static struct pci_device_id hunt_nics[] = {
        PCI_ROM(0x1924, 0x0903, "SFC9120", "Solarflare SFC9120 Adapter", 0),
        PCI_ROM(0x1924, 0x0923, "SFC9140", "Solarflare SFC9140 Adapter", 0),
        PCI_ROM(0x1924, 0x0a03, "SFC9220", "Solarflare SFN8xxx Adapter", 0),
        PCI_ROM(0x1924, 0x0b03, "SFC9250", "Solarflare X25xx Adapter", 0),
};
 
struct pci_driver hunt_driver __pci_driver = {
        .ids = hunt_nics,
        .id_count = ARRAY_SIZE(hunt_nics),
        .probe = hunt_probe,
        .remove = hunt_remove,
};