From: Andy Moreton <amore...@solarflare.com>
Add efx_nic_hw_unavailable() routine to check for hardware presence
before continuing with NIC operations.
Signed-off-by: Andy Moreton <amore...@solarflare.com>
Signed-off-by: Andrew Rybchenko <arybche...@solarflare.com>
---
drivers/net/sfc/base/ef10_ev.c | 10 ++++++----
drivers/net/sfc/base/ef10_impl.h | 4 ++++
drivers/net/sfc/base/ef10_nic.c | 22 ++++++++++++++++++++++
drivers/net/sfc/base/efx.h | 4 ++++
drivers/net/sfc/base/efx_impl.h | 2 ++
drivers/net/sfc/base/efx_mcdi.c | 6 ++++++
drivers/net/sfc/base/efx_nic.c | 27 +++++++++++++++++++++++++++
7 files changed, 71 insertions(+), 4 deletions(-)
diff --git a/drivers/net/sfc/base/ef10_ev.c b/drivers/net/sfc/base/ef10_ev.c
index 287550605..cdf835f03 100644
--- a/drivers/net/sfc/base/ef10_ev.c
+++ b/drivers/net/sfc/base/ef10_ev.c
@@ -863,8 +863,9 @@ ef10_ev_rx(
EFX_EV_QSTAT_INCR(eep, EV_RX);
- /* Discard events after RXQ/TXQ errors */
- if (enp->en_reset_flags & (EFX_RESET_RXQ_ERR | EFX_RESET_TXQ_ERR))
+ /* Discard events after RXQ/TXQ errors, or hardware not available */
+ if (enp->en_reset_flags &
+ (EFX_RESET_RXQ_ERR | EFX_RESET_TXQ_ERR | EFX_RESET_HW_UNAVAIL))
return (B_FALSE);
/* Basic packet information */
@@ -1064,8 +1065,9 @@ ef10_ev_tx(
EFX_EV_QSTAT_INCR(eep, EV_TX);
- /* Discard events after RXQ/TXQ errors */
- if (enp->en_reset_flags & (EFX_RESET_RXQ_ERR | EFX_RESET_TXQ_ERR))
+ /* Discard events after RXQ/TXQ errors, or hardware not available */
+ if (enp->en_reset_flags &
+ (EFX_RESET_RXQ_ERR | EFX_RESET_TXQ_ERR | EFX_RESET_HW_UNAVAIL))
return (B_FALSE);
if (EFX_QWORD_FIELD(*eqp, ESF_DZ_TX_DROP_EVENT) != 0) {
diff --git a/drivers/net/sfc/base/ef10_impl.h b/drivers/net/sfc/base/ef10_impl.h
index 503f02362..0214a75ef 100644
--- a/drivers/net/sfc/base/ef10_impl.h
+++ b/drivers/net/sfc/base/ef10_impl.h
@@ -190,6 +190,10 @@ extern __checkReturn efx_rc_t
ef10_nic_init(
__in efx_nic_t *enp);
+extern __checkReturn boolean_t
+ef10_nic_hw_unavailable(
+ __in efx_nic_t *enp);
+
#if EFSYS_OPT_DIAG
extern __checkReturn efx_rc_t
diff --git a/drivers/net/sfc/base/ef10_nic.c b/drivers/net/sfc/base/ef10_nic.c
index 332f6ef81..ff96a7ff2 100644
--- a/drivers/net/sfc/base/ef10_nic.c
+++ b/drivers/net/sfc/base/ef10_nic.c
@@ -2304,6 +2304,28 @@ ef10_nic_get_bar_region(
return (rc);
}
+ __checkReturn boolean_t
+ef10_nic_hw_unavailable(
+ __in efx_nic_t *enp)
+{
+ efx_dword_t dword;
+
+ if (enp->en_reset_flags & EFX_RESET_HW_UNAVAIL)
+ return (B_TRUE);
+
+ EFX_BAR_READD(enp, ER_DZ_BIU_MC_SFT_STATUS_REG, &dword, B_FALSE);
+ if (EFX_DWORD_FIELD(dword, EFX_DWORD_0) == 0xffffffff)
+ goto unavail;
+
+ return (B_FALSE);
+
+unavail:
+ EFSYS_PROBE(hw_unavail);
+ enp->en_reset_flags |= EFX_RESET_HW_UNAVAIL;
+
+ return (B_TRUE);
+}
+
void
ef10_nic_fini(
__in efx_nic_t *enp)
diff --git a/drivers/net/sfc/base/efx.h b/drivers/net/sfc/base/efx.h
index 2356a9294..fce519037 100644
--- a/drivers/net/sfc/base/efx.h
+++ b/drivers/net/sfc/base/efx.h
@@ -155,6 +155,10 @@ extern __checkReturn efx_rc_t
efx_nic_reset(
__in efx_nic_t *enp);
+extern __checkReturn boolean_t
+efx_nic_hw_unavailable(
+ __in efx_nic_t *enp);
+
#if EFSYS_OPT_DIAG
extern __checkReturn efx_rc_t
diff --git a/drivers/net/sfc/base/efx_impl.h b/drivers/net/sfc/base/efx_impl.h
index 78df43018..8a7dc8cf6 100644
--- a/drivers/net/sfc/base/efx_impl.h
+++ b/drivers/net/sfc/base/efx_impl.h
@@ -59,6 +59,7 @@ extern "C" {
#define EFX_RESET_PHY 0x00000001
#define EFX_RESET_RXQ_ERR 0x00000002
#define EFX_RESET_TXQ_ERR 0x00000004
+#define EFX_RESET_HW_UNAVAIL 0x00000008
typedef enum efx_mac_type_e {
EFX_MAC_INVALID = 0,
@@ -356,6 +357,7 @@ typedef struct efx_nic_ops_s {
efx_rc_t (*eno_get_vi_pool)(efx_nic_t *, uint32_t *);
efx_rc_t (*eno_get_bar_region)(efx_nic_t *, efx_nic_region_t,
uint32_t *, size_t *);
+ boolean_t (*eno_hw_unavailable)(efx_nic_t *);
#if EFSYS_OPT_DIAG
efx_rc_t (*eno_register_test)(efx_nic_t *);
#endif /* EFSYS_OPT_DIAG */
diff --git a/drivers/net/sfc/base/efx_mcdi.c b/drivers/net/sfc/base/efx_mcdi.c
index 84d8452e4..c8d670c23 100644
--- a/drivers/net/sfc/base/efx_mcdi.c
+++ b/drivers/net/sfc/base/efx_mcdi.c
@@ -496,6 +496,12 @@ efx_mcdi_request_poll(
EFSYS_ASSERT(!emip->emi_ev_cpl);
emrp = emip->emi_pending_req;
+ /* Check if hardware is unavailable */
+ if (efx_nic_hw_unavailable(enp)) {
+ EFSYS_UNLOCK(enp->en_eslp, state);
+ return (B_FALSE);
+ }
+
/* Check for reboot atomically w.r.t efx_mcdi_request_start */
if (emip->emi_poll_cnt++ == 0) {
if ((rc = efx_mcdi_poll_reboot(enp)) != 0) {
diff --git a/drivers/net/sfc/base/efx_nic.c b/drivers/net/sfc/base/efx_nic.c
index c364bffba..22e464a4e 100644
--- a/drivers/net/sfc/base/efx_nic.c
+++ b/drivers/net/sfc/base/efx_nic.c
@@ -100,6 +100,7 @@ static const efx_nic_ops_t __efx_nic_siena_ops = {
siena_nic_init, /* eno_init */
NULL, /* eno_get_vi_pool */
NULL, /* eno_get_bar_region */
+ NULL, /* eno_hw_unavailable */
#if EFSYS_OPT_DIAG
siena_nic_register_test, /* eno_register_test */
#endif /* EFSYS_OPT_DIAG */
@@ -119,6 +120,7 @@ static const efx_nic_ops_t __efx_nic_hunt_ops = {
ef10_nic_init, /* eno_init */
ef10_nic_get_vi_pool, /* eno_get_vi_pool */
ef10_nic_get_bar_region, /* eno_get_bar_region */
+ ef10_nic_hw_unavailable, /* eno_hw_unavailable */
#if EFSYS_OPT_DIAG
ef10_nic_register_test, /* eno_register_test */
#endif /* EFSYS_OPT_DIAG */
@@ -138,6 +140,7 @@ static const efx_nic_ops_t __efx_nic_medford_ops = {
ef10_nic_init, /* eno_init */
ef10_nic_get_vi_pool, /* eno_get_vi_pool */
ef10_nic_get_bar_region, /* eno_get_bar_region */
+ ef10_nic_hw_unavailable, /* eno_hw_unavailable */
#if EFSYS_OPT_DIAG
ef10_nic_register_test, /* eno_register_test */
#endif /* EFSYS_OPT_DIAG */
@@ -157,6 +160,7 @@ static const efx_nic_ops_t __efx_nic_medford2_ops = {
ef10_nic_init, /* eno_init */
ef10_nic_get_vi_pool, /* eno_get_vi_pool */
ef10_nic_get_bar_region, /* eno_get_bar_region */
+ ef10_nic_hw_unavailable, /* eno_hw_unavailable */
#if EFSYS_OPT_DIAG
ef10_nic_register_test, /* eno_register_test */
#endif /* EFSYS_OPT_DIAG */
@@ -652,6 +656,29 @@ efx_nic_get_fw_version(
return (rc);
}
+ __checkReturn boolean_t
+efx_nic_hw_unavailable(
+ __in efx_nic_t *enp)
+{
+ const efx_nic_ops_t *enop = enp->en_enop;
+
+ EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
+ /* NOTE: can be used by MCDI before NIC probe */
+
+ if (enop->eno_hw_unavailable != NULL) {
+ if ((enop->eno_hw_unavailable)(enp) != B_FALSE)
+ goto unavail;
+ }
+
+ return (B_FALSE);
+
+unavail:
+ EFSYS_PROBE(hw_unavail);
+
+ return (B_TRUE);
+}
+
+
#if EFSYS_OPT_DIAG
__checkReturn efx_rc_t
--
2.17.1
