From 183614bff5fc1682240ab7604201e18afb118092 Mon Sep 17 00:00:00 2001 From: Martin Habets Date: Wed, 1 Jun 2022 08:36:02 +0200 Subject: sfc/siena: fix considering that all channels have TX queues MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Normally, all channels have RX and TX queues, but this is not true if modparam efx_separate_tx_channels=1 is used. In that cases, some channels only have RX queues and others only TX queues (or more preciselly, they have them allocated, but not initialized). Fix efx_channel_has_tx_queues to return the correct value for this case too. This has been already done for sfc, do it also for sfc_siena. Messages shown at probe time before the fix: sfc 0000:03:00.0 ens6f0np0: MC command 0x82 inlen 544 failed rc=-22 (raw=0) arg=0 ------------[ cut here ]------------ netdevice: ens6f0np0: failed to initialise TXQ -1 WARNING: CPU: 1 PID: 626 at drivers/net/ethernet/sfc/ef10.c:2393 efx_ef10_tx_init+0x201/0x300 [sfc] [...] stripped RIP: 0010:efx_ef10_tx_init+0x201/0x300 [sfc] [...] stripped Call Trace: efx_init_tx_queue+0xaa/0xf0 [sfc] efx_start_channels+0x49/0x120 [sfc] efx_start_all+0x1f8/0x430 [sfc] efx_net_open+0x5a/0xe0 [sfc] __dev_open+0xd0/0x190 __dev_change_flags+0x1b3/0x220 dev_change_flags+0x21/0x60 [...] stripped Messages shown at remove time before the fix: sfc 0000:03:00.0 ens6f0np0: failed to flush 10 queues sfc 0000:03:00.0 ens6f0np0: failed to flush queues Fixes: 8700aff08984 ("sfc: fix channel allocation with brute force") Reported-by: Tianhao Zhao Signed-off-by: Martin Habets Tested-by: Íñigo Huguet Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/sfc/siena/net_driver.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/sfc/siena/net_driver.h b/drivers/net/ethernet/sfc/siena/net_driver.h index a8f6c3699c8b..c4a97fbf4672 100644 --- a/drivers/net/ethernet/sfc/siena/net_driver.h +++ b/drivers/net/ethernet/sfc/siena/net_driver.h @@ -1529,7 +1529,7 @@ static inline bool efx_channel_is_xdp_tx(struct efx_channel *channel) static inline bool efx_channel_has_tx_queues(struct efx_channel *channel) { - return true; + return channel && channel->channel >= channel->efx->tx_channel_offset; } static inline unsigned int efx_channel_num_tx_queues(struct efx_channel *channel) -- cgit v1.2.3 From 25bde571b4a83a73bb37beacb833bbd9c38b43c6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=8D=C3=B1igo=20Huguet?= Date: Wed, 1 Jun 2022 08:36:03 +0200 Subject: sfc/siena: fix wrong tx channel offset with efx_separate_tx_channels MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit tx_channel_offset is calculated in efx_allocate_msix_channels, but it is also calculated again in efx_set_channels because it was originally done there, and when efx_allocate_msix_channels was introduced it was forgotten to be removed from efx_set_channels. Moreover, the old calculation is wrong when using efx_separate_tx_channels because now we can have XDP channels after the TX channels, so n_channels - n_tx_channels doesn't point to the first TX channel. Remove the old calculation from efx_set_channels, and add the initialization of this variable if MSI or legacy interrupts are used, next to the initialization of the rest of the related variables, where it was missing. This has been already done for sfc, do it also for sfc_siena. Fixes: 3990a8fffbda ("sfc: allocate channels for XDP tx queues") Reported-by: Tianhao Zhao Signed-off-by: Íñigo Huguet Acked-by: Martin Habets Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/sfc/siena/efx_channels.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/sfc/siena/efx_channels.c b/drivers/net/ethernet/sfc/siena/efx_channels.c index 2465cf4d505c..017212a40df3 100644 --- a/drivers/net/ethernet/sfc/siena/efx_channels.c +++ b/drivers/net/ethernet/sfc/siena/efx_channels.c @@ -299,6 +299,7 @@ int efx_siena_probe_interrupts(struct efx_nic *efx) efx->n_channels = 1; efx->n_rx_channels = 1; efx->n_tx_channels = 1; + efx->tx_channel_offset = 0; efx->n_xdp_channels = 0; efx->xdp_channel_offset = efx->n_channels; rc = pci_enable_msi(efx->pci_dev); @@ -319,6 +320,7 @@ int efx_siena_probe_interrupts(struct efx_nic *efx) efx->n_channels = 1 + (efx_siena_separate_tx_channels ? 1 : 0); efx->n_rx_channels = 1; efx->n_tx_channels = 1; + efx->tx_channel_offset = 1; efx->n_xdp_channels = 0; efx->xdp_channel_offset = efx->n_channels; efx->legacy_irq = efx->pci_dev->irq; @@ -958,10 +960,6 @@ int efx_siena_set_channels(struct efx_nic *efx) struct efx_channel *channel; int rc; - efx->tx_channel_offset = - efx_siena_separate_tx_channels ? - efx->n_channels - efx->n_tx_channels : 0; - if (efx->xdp_tx_queue_count) { EFX_WARN_ON_PARANOID(efx->xdp_tx_queues); -- cgit v1.2.3