sfc: EFX_WORKAROUND_ALWAYS is really specific to Falcon-architecture

The workarounds that currently use EFX_WORKAROUND_ALWAYS are in
Falcon-specific or Falcon-arch-specific code, so get rid of the
conditions altogether.  Add/move comments as appropriate.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

diff --git a/drivers/net/ethernet/sfc/falcon.c b/drivers/net/ethernet/sfc/falcon.c
index 17bd7dc..0fd8a88 100644 (file)
--- a/drivers/net/ethernet/sfc/falcon.c
+++ b/drivers/net/ethernet/sfc/falcon.c
@@ -686,7 +686,7 @@ static void falcon_ack_status_intr(struct efx_nic *efx)
                return;
 
        /* We expect xgmii faults if the wireside link is down */
-       if (!EFX_WORKAROUND_5147(efx) || !efx->link_state.up)
+       if (!efx->link_state.up)
                return;
 
        /* We can only use this interrupt to signal the negative edge of
@@ -795,29 +795,22 @@ static void falcon_reconfigure_xgxs_core(struct efx_nic *efx)
        bool xgxs_loopback = (efx->loopback_mode == LOOPBACK_XGXS);
        bool xaui_loopback = (efx->loopback_mode == LOOPBACK_XAUI);
        bool xgmii_loopback = (efx->loopback_mode == LOOPBACK_XGMII);
+       bool old_xgmii_loopback, old_xgxs_loopback, old_xaui_loopback;
 
        /* XGXS block is flaky and will need to be reset if moving
         * into our out of XGMII, XGXS or XAUI loopbacks. */
-       if (EFX_WORKAROUND_5147(efx)) {
-               bool old_xgmii_loopback, old_xgxs_loopback, old_xaui_loopback;
-               bool reset_xgxs;
-
-               efx_reado(efx, &reg, FR_AB_XX_CORE_STAT);
-               old_xgxs_loopback = EFX_OWORD_FIELD(reg, FRF_AB_XX_XGXS_LB_EN);
-               old_xgmii_loopback =
-                       EFX_OWORD_FIELD(reg, FRF_AB_XX_XGMII_LB_EN);
-
-               efx_reado(efx, &reg, FR_AB_XX_SD_CTL);
-               old_xaui_loopback = EFX_OWORD_FIELD(reg, FRF_AB_XX_LPBKA);
+       efx_reado(efx, &reg, FR_AB_XX_CORE_STAT);
+       old_xgxs_loopback = EFX_OWORD_FIELD(reg, FRF_AB_XX_XGXS_LB_EN);
+       old_xgmii_loopback = EFX_OWORD_FIELD(reg, FRF_AB_XX_XGMII_LB_EN);
 
-               /* The PHY driver may have turned XAUI off */
-               reset_xgxs = ((xgxs_loopback != old_xgxs_loopback) ||
-                             (xaui_loopback != old_xaui_loopback) ||
-                             (xgmii_loopback != old_xgmii_loopback));
+       efx_reado(efx, &reg, FR_AB_XX_SD_CTL);
+       old_xaui_loopback = EFX_OWORD_FIELD(reg, FRF_AB_XX_LPBKA);
 
-               if (reset_xgxs)
-                       falcon_reset_xaui(efx);
-       }
+       /* The PHY driver may have turned XAUI off */
+       if ((xgxs_loopback != old_xgxs_loopback) ||
+           (xaui_loopback != old_xaui_loopback) ||
+           (xgmii_loopback != old_xgmii_loopback))
+               falcon_reset_xaui(efx);
 
        efx_reado(efx, &reg, FR_AB_XX_CORE_STAT);
        EFX_SET_OWORD_FIELD(reg, FRF_AB_XX_FORCE_SIG,
@@ -946,8 +939,8 @@ static void falcon_poll_xmac(struct efx_nic *efx)
 {
        struct falcon_nic_data *nic_data = efx->nic_data;
 
-       if (!EFX_WORKAROUND_5147(efx) || !efx->link_state.up ||
-           !nic_data->xmac_poll_required)
+       /* We expect xgmii faults if the wireside link is down */
+       if (!efx->link_state.up || !nic_data->xmac_poll_required)
                return;
 
        nic_data->xmac_poll_required = !falcon_xmac_link_ok_retry(efx, 1);

diff --git a/drivers/net/ethernet/sfc/farch.c b/drivers/net/ethernet/sfc/farch.c
index c3d07c5..7f50882 100644 (file)
--- a/drivers/net/ethernet/sfc/farch.c
+++ b/drivers/net/ethernet/sfc/farch.c
@@ -830,8 +830,7 @@ efx_farch_handle_tx_event(struct efx_channel *channel, efx_qword_t *event)
                netif_tx_lock(efx->net_dev);
                efx_farch_notify_tx_desc(tx_queue);
                netif_tx_unlock(efx->net_dev);
-       } else if (EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_PKT_ERR) &&
-                  EFX_WORKAROUND_10727(efx)) {
+       } else if (EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_PKT_ERR)) {
                efx_schedule_reset(efx, RESET_TYPE_TX_DESC_FETCH);
        } else {
                netif_err(efx, tx_err, efx->net_dev,
@@ -1531,8 +1530,7 @@ irqreturn_t efx_farch_legacy_interrupt(int irq, void *dev_id)
        }
 
        if (queues != 0) {
-               if (EFX_WORKAROUND_15783(efx))
-                       efx->irq_zero_count = 0;
+               efx->irq_zero_count = 0;
 
                /* Schedule processing of any interrupting queues */
                if (likely(soft_enabled)) {
@@ -1544,9 +1542,11 @@ irqreturn_t efx_farch_legacy_interrupt(int irq, void *dev_id)
                }
                result = IRQ_HANDLED;
 
-       } else if (EFX_WORKAROUND_15783(efx)) {
+       } else {
                efx_qword_t *event;
 
+               /* Legacy ISR read can return zero once (SF bug 15783) */
+
                /* We can't return IRQ_HANDLED more than once on seeing ISR=0
                 * because this might be a shared interrupt. */
                if (efx->irq_zero_count++ == 0)

diff --git a/drivers/net/ethernet/sfc/workarounds.h b/drivers/net/ethernet/sfc/workarounds.h
index dff565a..7e5be1d 100644 (file)
--- a/drivers/net/ethernet/sfc/workarounds.h
+++ b/drivers/net/ethernet/sfc/workarounds.h
@@ -15,25 +15,15 @@
  * Bug numbers are from Solarflare's Bugzilla.
  */
 
-#define EFX_WORKAROUND_ALWAYS(efx) 1
 #define EFX_WORKAROUND_FALCON_A(efx) (efx_nic_rev(efx) <= EFX_REV_FALCON_A1)
 #define EFX_WORKAROUND_FALCON_AB(efx) (efx_nic_rev(efx) <= EFX_REV_FALCON_B0)
 #define EFX_WORKAROUND_SIENA(efx) (efx_nic_rev(efx) == EFX_REV_SIENA_A0)
 #define EFX_WORKAROUND_10G(efx) 1
 
-/* XAUI resets if link not detected */
-#define EFX_WORKAROUND_5147 EFX_WORKAROUND_ALWAYS
-/* RX PCIe double split performance issue */
-#define EFX_WORKAROUND_7575 EFX_WORKAROUND_ALWAYS
 /* Bit-bashed I2C reads cause performance drop */
 #define EFX_WORKAROUND_7884 EFX_WORKAROUND_10G
-/* TX_EV_PKT_ERR can be caused by a dangling TX descriptor
- * or a PCIe error (bug 11028) */
-#define EFX_WORKAROUND_10727 EFX_WORKAROUND_ALWAYS
 /* Truncated IPv4 packets can confuse the TX packet parser */
 #define EFX_WORKAROUND_15592 EFX_WORKAROUND_FALCON_AB
-/* Legacy ISR read can return zero once */
-#define EFX_WORKAROUND_15783 EFX_WORKAROUND_ALWAYS
 /* Legacy interrupt storm when interrupt fifo fills */
 #define EFX_WORKAROUND_17213 EFX_WORKAROUND_SIENA