diff mbox series

[net-next,2/8] sfc: Add a PROBED state for EF100 VDPA use.

Message ID 165573351712.2982.9135500081206138211.stgit@palantir17.mph.net (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series sfc: Add extra states for VDPA | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1 this patch: 1
netdev/cc_maintainers success CCed 7 of 7 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1 this patch: 1
netdev/checkpatch warning CHECK: Macro argument 'efx' may be better as '(efx)' to avoid precedence issues WARNING: Non-standard signature: Co-authored-by: WARNING: line length of 81 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 57 this patch: 57
netdev/source_inline success Was 0 now: 0

Commit Message

Martin Habets June 20, 2022, 1:58 p.m. UTC 
From: Jonathan Cooper <jonathan.s.cooper@amd.com>

For VDPA we need to tear down the driver to the point where it
has various control channels like MCDI, but it no longer has
a network device. This adds a state corresponding to
that mode that will be used when VDPA support is added.

Signed-off-by: Jonathan Cooper <jonathan.s.cooper@amd.com>
Co-authored-by: Martin Habets <habetsm.xilinx@gmail.com>
---
 drivers/net/ethernet/sfc/ef100_netdev.c |    2 +-
 drivers/net/ethernet/sfc/efx_common.c   |    6 ++++--
 drivers/net/ethernet/sfc/efx_common.h   |    8 ++++----
 drivers/net/ethernet/sfc/net_driver.h   |    3 ++-
 4 files changed, 11 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/sfc/ef100_netdev.c b/drivers/net/ethernet/sfc/ef100_netdev.c
index b9106ce678d9..3bb9a79bad22 100644
--- a/drivers/net/ethernet/sfc/ef100_netdev.c
+++ b/drivers/net/ethernet/sfc/ef100_netdev.c
@@ -291,7 +291,7 @@  void ef100_unregister_netdev(struct efx_nic *efx)
 {
 	if (efx_dev_registered(efx)) {
 		efx_fini_mcdi_logging(efx);
-		efx->state = STATE_UNINIT;
+		efx->state = STATE_PROBED;
 		unregister_netdev(efx->net_dev);
 	}
 }
diff --git a/drivers/net/ethernet/sfc/efx_common.c b/drivers/net/ethernet/sfc/efx_common.c
index f6baebd9d632..0e0e86a53407 100644
--- a/drivers/net/ethernet/sfc/efx_common.c
+++ b/drivers/net/ethernet/sfc/efx_common.c
@@ -1222,8 +1222,10 @@  static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev,
 
 		efx_device_detach_sync(efx);
 
-		efx_stop_all(efx);
-		efx_disable_interrupts(efx);
+		if (efx_net_active(efx->state)) {
+			efx_stop_all(efx);
+			efx_disable_interrupts(efx);
+		}
 
 		status = PCI_ERS_RESULT_NEED_RESET;
 	} else {
diff --git a/drivers/net/ethernet/sfc/efx_common.h b/drivers/net/ethernet/sfc/efx_common.h
index c72e819da8fd..1d166ca71354 100644
--- a/drivers/net/ethernet/sfc/efx_common.h
+++ b/drivers/net/ethernet/sfc/efx_common.h
@@ -43,10 +43,10 @@  void efx_start_monitor(struct efx_nic *efx);
 int __efx_reconfigure_port(struct efx_nic *efx);
 int efx_reconfigure_port(struct efx_nic *efx);
 
-#define EFX_ASSERT_RESET_SERIALISED(efx)		\
-	do {						\
-		if (efx->state != STATE_UNINIT)		\
-			ASSERT_RTNL();			\
+#define EFX_ASSERT_RESET_SERIALISED(efx)					\
+	do {									\
+		if (efx->state != STATE_UNINIT && efx->state != STATE_PROBED)	\
+			ASSERT_RTNL();						\
 	} while (0)
 
 int efx_try_recovery(struct efx_nic *efx);
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 95069125931a..546552d5d86f 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -623,7 +623,8 @@  enum efx_int_mode {
 
 enum nic_state {
 	STATE_UNINIT = 0,	/* device being probed/removed */
-	STATE_NET_DOWN,		/* hardware probed and netdev registered */
+	STATE_PROBED,		/* hardware probed */
+	STATE_NET_DOWN,		/* netdev registered */
 	STATE_NET_UP,		/* ready for traffic */
 	STATE_DISABLED,		/* device disabled due to hardware errors */