4778 iprb shouldn't abuse ddi_get_time(9f)
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>

*** 296,307 ****
          (void) GET8(ip, CSR_INTCTL);
  
          /*
           * Precalculate watchdog times.
           */
!         ip->tx_timeout = drv_usectohz(TX_WATCHDOG * 1000000);
!         ip->rx_timeout = drv_usectohz(RX_WATCHDOG * 1000000);
  
          iprb_identify(ip);
  
          /* Obtain our factory MAC address */
          w = iprb_eeprom_read(ip, 0);
--- 296,307 ----
          (void) GET8(ip, CSR_INTCTL);
  
          /*
           * Precalculate watchdog times.
           */
!         ip->tx_timeout = TX_WATCHDOG;
!         ip->rx_timeout = RX_WATCHDOG;
  
          iprb_identify(ip);
  
          /* Obtain our factory MAC address */
          w = iprb_eeprom_read(ip, 0);
*** 701,711 ****
                  ip->cmd_tail %= NUM_TX;
                  ip->cmd_count--;
                  if (ip->cmd_count == 0) {
                          ip->tx_wdog = 0;
                  } else {
!                         ip->tx_wdog = ddi_get_time();
                  }
          }
  }
  
  int
--- 701,711 ----
                  ip->cmd_tail %= NUM_TX;
                  ip->cmd_count--;
                  if (ip->cmd_count == 0) {
                          ip->tx_wdog = 0;
                  } else {
!                         ip->tx_wdog = gethrtime();
                  }
          }
  }
  
  int
*** 773,783 ****
           * will not have any effect.
           */
          PUT8(ip, CSR_CMD, CUC_RESUME);
          (void) GET8(ip, CSR_CMD);       /* flush CSR */
  
!         ip->tx_wdog = ddi_get_time();
          ip->cmd_last = ip->cmd_head;
          ip->cmd_head++;
          ip->cmd_head %= NUM_TX;
          ip->cmd_count++;
  
--- 773,783 ----
           * will not have any effect.
           */
          PUT8(ip, CSR_CMD, CUC_RESUME);
          (void) GET8(ip, CSR_CMD);       /* flush CSR */
  
!         ip->tx_wdog = gethrtime();
          ip->cmd_last = ip->cmd_head;
          ip->cmd_head++;
          ip->cmd_head %= NUM_TX;
          ip->cmd_count++;
  
*** 1008,1026 ****
  
  void
  iprb_update_stats(iprb_t *ip)
  {
          iprb_dma_t      *sp = &ip->stats;
!         time_t          tstamp;
          int             i;
  
          ASSERT(mutex_owned(&ip->culock));
  
          /* Collect the hardware stats, but don't keep redoing it */
!         if ((tstamp = ddi_get_time()) == ip->stats_time) {
                  return;
-         }
  
          PUTSTAT(sp, STATS_DONE_OFFSET, 0);
          SYNCSTATS(sp, 0, 0, DDI_DMA_SYNC_FORDEV);
  
          if (iprb_cmd_ready(ip) != DDI_SUCCESS)
--- 1008,1026 ----
  
  void
  iprb_update_stats(iprb_t *ip)
  {
          iprb_dma_t      *sp = &ip->stats;
!         hrtime_t        tstamp;
          int             i;
  
          ASSERT(mutex_owned(&ip->culock));
  
          /* Collect the hardware stats, but don't keep redoing it */
!         tstamp = gethrtime();
!         if (tstamp / NANOSEC == ip->stats_time / NANOSEC)
                  return;
  
          PUTSTAT(sp, STATS_DONE_OFFSET, 0);
          SYNCSTATS(sp, 0, 0, DDI_DMA_SYNC_FORDEV);
  
          if (iprb_cmd_ready(ip) != DDI_SUCCESS)
*** 1172,1182 ****
                  SYNCRFD(rfd, RFD_STS_OFFSET, 2, DDI_DMA_SYNC_FORKERNEL);
                  if ((GETRFD16(rfd, RFD_STS_OFFSET) & RFD_STS_C) == 0) {
                          break;
                  }
  
!                 ip->rx_wdog = ddi_get_time();
  
                  SYNCRFD(rfd, 0, 0, DDI_DMA_SYNC_FORKERNEL);
                  cnt = GETRFD16(rfd, RFD_CNT_OFFSET);
                  cnt &= ~(RFD_CNT_EOF | RFD_CNT_F);
                  sts = GETRFD16(rfd, RFD_STS_OFFSET);
--- 1172,1182 ----
                  SYNCRFD(rfd, RFD_STS_OFFSET, 2, DDI_DMA_SYNC_FORKERNEL);
                  if ((GETRFD16(rfd, RFD_STS_OFFSET) & RFD_STS_C) == 0) {
                          break;
                  }
  
!                 ip->rx_wdog = gethrtime();
  
                  SYNCRFD(rfd, 0, 0, DDI_DMA_SYNC_FORKERNEL);
                  cnt = GETRFD16(rfd, RFD_CNT_OFFSET);
                  cnt &= ~(RFD_CNT_EOF | RFD_CNT_F);
                  sts = GETRFD16(rfd, RFD_STS_OFFSET);
*** 1661,1679 ****
           * is up, then it might be a hung chip.  This problem
           * reportedly only occurs at 10 Mbps.
           */
          if (ip->rxhangbug &&
              ((ip->miih == NULL) || (mii_get_speed(ip->miih) == 10000000)) &&
!             ((ddi_get_time() - ip->rx_wdog) > ip->rx_timeout)) {
                  cmn_err(CE_CONT, "?Possible RU hang, resetting.\n");
                  reset = B_TRUE;
          }
  
          /* update the statistics */
          mutex_enter(&ip->culock);
  
!         if (ip->tx_wdog && ((ddi_get_time() - ip->tx_wdog) > ip->tx_timeout)) {
                  /* transmit/CU hang? */
                  cmn_err(CE_CONT, "?CU stalled, resetting.\n");
                  reset = B_TRUE;
          }
  
--- 1661,1679 ----
           * is up, then it might be a hung chip.  This problem
           * reportedly only occurs at 10 Mbps.
           */
          if (ip->rxhangbug &&
              ((ip->miih == NULL) || (mii_get_speed(ip->miih) == 10000000)) &&
!             ((gethrtime() - ip->rx_wdog) > ip->rx_timeout)) {
                  cmn_err(CE_CONT, "?Possible RU hang, resetting.\n");
                  reset = B_TRUE;
          }
  
          /* update the statistics */
          mutex_enter(&ip->culock);
  
!         if (ip->tx_wdog && ((gethrtime() - ip->tx_wdog) > ip->tx_timeout)) {
                  /* transmit/CU hang? */
                  cmn_err(CE_CONT, "?CU stalled, resetting.\n");
                  reset = B_TRUE;
          }