drivers/net/ethernet/sfc/mcdi_mac.c

   1 /****************************************************************************
   2  * Driver for Solarflare Solarstorm network controllers and boards
   3  * Copyright 2009-2010 Solarflare Communications Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published
   7  * by the Free Software Foundation, incorporated herein by reference.
   8  */
   9
  10 #include "net_driver.h"
  11 #include "efx.h"
  12 #include "mcdi.h"
  13 #include "mcdi_pcol.h"
  14
  15 int efx_mcdi_set_mac(struct efx_nic *efx)
  16 {
  17         u32 reject, fcntl;
  18         u8 cmdbytes[MC_CMD_SET_MAC_IN_LEN];
  19
  20         memcpy(cmdbytes + MC_CMD_SET_MAC_IN_ADDR_OFST,
  21                efx->net_dev->dev_addr, ETH_ALEN);
  22
  23         MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_MTU,
  24                         EFX_MAX_FRAME_LEN(efx->net_dev->mtu));
  25         MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_DRAIN, 0);
  26
  27         /* The MCDI command provides for controlling accept/reject
  28          * of broadcast packets too, but the driver doesn't currently
  29          * expose this. */
  30         reject = (efx->promiscuous) ? 0 :
  31                 (1 << MC_CMD_SET_MAC_IN_REJECT_UNCST_LBN);
  32         MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_REJECT, reject);
  33
  34         switch (efx->wanted_fc) {
  35         case EFX_FC_RX | EFX_FC_TX:
  36                 fcntl = MC_CMD_FCNTL_BIDIR;
  37                 break;
  38         case EFX_FC_RX:
  39                 fcntl = MC_CMD_FCNTL_RESPOND;
  40                 break;
  41         default:
  42                 fcntl = MC_CMD_FCNTL_OFF;
  43                 break;
  44         }
  45         if (efx->wanted_fc & EFX_FC_AUTO)
  46                 fcntl = MC_CMD_FCNTL_AUTO;
  47         if (efx->fc_disable)
  48                 fcntl = MC_CMD_FCNTL_OFF;
  49
  50         MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_FCNTL, fcntl);
  51
  52         return efx_mcdi_rpc(efx, MC_CMD_SET_MAC, cmdbytes, sizeof(cmdbytes),
  53                             NULL, 0, NULL);
  54 }
  55
  56 bool efx_mcdi_mac_check_fault(struct efx_nic *efx)
  57 {
  58         u8 outbuf[MC_CMD_GET_LINK_OUT_LEN];
  59         size_t outlength;
  60         int rc;
  61
  62         BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
  63
  64         rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
  65                           outbuf, sizeof(outbuf), &outlength);
  66         if (rc) {
  67                 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n",
  68                           __func__, rc);
  69                 return true;
  70         }
  71
  72         return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0;
  73 }
  74
  75 int efx_mcdi_mac_stats(struct efx_nic *efx, dma_addr_t dma_addr,
  76                        u32 dma_len, int enable, int clear)
  77 {
  78         u8 inbuf[MC_CMD_MAC_STATS_IN_LEN];
  79         int rc;
  80         efx_dword_t *cmd_ptr;
  81         int period = enable ? 1000 : 0;
  82         u32 addr_hi;
  83         u32 addr_lo;
  84
  85         BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0);
  86
  87         addr_lo = ((u64)dma_addr) >> 0;
  88         addr_hi = ((u64)dma_addr) >> 32;
  89
  90         MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_ADDR_LO, addr_lo);
  91         MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_ADDR_HI, addr_hi);
  92         cmd_ptr = (efx_dword_t *)MCDI_PTR(inbuf, MAC_STATS_IN_CMD);
  93         EFX_POPULATE_DWORD_7(*cmd_ptr,
  94                              MC_CMD_MAC_STATS_IN_DMA, !!enable,
  95                              MC_CMD_MAC_STATS_IN_CLEAR, clear,
  96                              MC_CMD_MAC_STATS_IN_PERIODIC_CHANGE, 1,
  97                              MC_CMD_MAC_STATS_IN_PERIODIC_ENABLE, !!enable,
  98                              MC_CMD_MAC_STATS_IN_PERIODIC_CLEAR, 0,
  99                              MC_CMD_MAC_STATS_IN_PERIODIC_NOEVENT, 1,
 100                              MC_CMD_MAC_STATS_IN_PERIOD_MS, period);
 101         MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len);
 102
 103         rc = efx_mcdi_rpc(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf),
 104                           NULL, 0, NULL);
 105         if (rc)
 106                 goto fail;
 107
 108         return 0;
 109
 110 fail:
 111         netif_err(efx, hw, efx->net_dev, "%s: %s failed rc=%d\n",
 112                   __func__, enable ? "enable" : "disable", rc);
 113         return rc;
 114 }
 115
 116 int efx_mcdi_mac_reconfigure(struct efx_nic *efx)
 117 {
 118         int rc;
 119
 120         WARN_ON(!mutex_is_locked(&efx->mac_lock));
 121
 122         rc = efx_mcdi_set_mac(efx);
 123         if (rc != 0)
 124                 return rc;
 125
 126         return efx_mcdi_rpc(efx, MC_CMD_SET_MCAST_HASH,
 127                             efx->multicast_hash.byte,
 128                             sizeof(efx->multicast_hash),
 129                             NULL, 0, NULL);
 130 }