sfc: Add support for SFC9000 family (2)
This integrates support for the SFC9000 family of 10G Ethernet
controllers and LAN-on-motherboard chips, starting with the SFL9021
'Siena' and SFC9020 'Bethpage'.
Credit for this code is largely due to my colleagues at Solarflare:
Guido Barzini
Steve Hodgson
Kieran Mansley
Matthew Slattery
Neil Turton
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index 97a6ebd..4b5c786 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -25,6 +25,8 @@
#include "mdio_10g.h"
#include "nic.h"
+#include "mcdi.h"
+
/**************************************************************************
*
* Type name strings
@@ -84,6 +86,7 @@
[RESET_TYPE_RX_DESC_FETCH] = "RX_DESC_FETCH",
[RESET_TYPE_TX_DESC_FETCH] = "TX_DESC_FETCH",
[RESET_TYPE_TX_SKIP] = "TX_SKIP",
+ [RESET_TYPE_MC_FAILURE] = "MC_FAILURE",
};
#define EFX_MAX_MTU (9 * 1024)
@@ -1191,6 +1194,15 @@
efx_nic_enable_interrupts(efx);
+ /* Switch to event based MCDI completions after enabling interrupts.
+ * If a reset has been scheduled, then we need to stay in polled mode.
+ * Rather than serialising efx_mcdi_mode_event() [which sleeps] and
+ * reset_pending [modified from an atomic context], we instead guarantee
+ * that efx_mcdi_mode_poll() isn't reverted erroneously */
+ efx_mcdi_mode_event(efx);
+ if (efx->reset_pending != RESET_TYPE_NONE)
+ efx_mcdi_mode_poll(efx);
+
/* Start the hardware monitor if there is one. Otherwise (we're link
* event driven), we have to poll the PHY because after an event queue
* flush, we could have a missed a link state change */
@@ -1242,6 +1254,9 @@
efx->type->stop_stats(efx);
+ /* Switch to MCDI polling on Siena before disabling interrupts */
+ efx_mcdi_mode_poll(efx);
+
/* Disable interrupts and wait for ISR to complete */
efx_nic_disable_interrupts(efx);
if (efx->legacy_irq)
@@ -1445,6 +1460,8 @@
return -EIO;
if (efx->phy_mode & PHY_MODE_SPECIAL)
return -EBUSY;
+ if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
+ return -EIO;
/* Notify the kernel of the link state polled during driver load,
* before the monitor starts running */
@@ -1895,6 +1912,7 @@
case RESET_TYPE_TX_SKIP:
method = RESET_TYPE_INVISIBLE;
break;
+ case RESET_TYPE_MC_FAILURE:
default:
method = RESET_TYPE_ALL;
break;
@@ -1908,6 +1926,10 @@
efx->reset_pending = method;
+ /* efx_process_channel() will no longer read events once a
+ * reset is scheduled. So switch back to poll'd MCDI completions. */
+ efx_mcdi_mode_poll(efx);
+
queue_work(reset_workqueue, &efx->reset_work);
}
@@ -1923,6 +1945,10 @@
.driver_data = (unsigned long) &falcon_a1_nic_type},
{PCI_DEVICE(EFX_VENDID_SFC, FALCON_B_P_DEVID),
.driver_data = (unsigned long) &falcon_b0_nic_type},
+ {PCI_DEVICE(EFX_VENDID_SFC, BETHPAGE_A_P_DEVID),
+ .driver_data = (unsigned long) &siena_a0_nic_type},
+ {PCI_DEVICE(EFX_VENDID_SFC, SIENA_A_P_DEVID),
+ .driver_data = (unsigned long) &siena_a0_nic_type},
{0} /* end of list */
};