diff options
| author |   Shannon Nelson <snelson@pensando.io> | 2020-08-27 16:00:28 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-08-28 08:01:30 -0700 |
| commit | a34e25ab977ced1c3366fc69c0595bb3fde63fad (patch) | |
| tree | 791eff1b9f42b1645ed3ddabed931aed76a4daa8 /drivers/net/ethernet/pensando/ionic/ionic_lif.h | |
| parent | ionic: change mtu without full queue rebuild (diff) | |
| download | linux-a34e25ab977ced1c3366fc69c0595bb3fde63fad.tar.xz linux-a34e25ab977ced1c3366fc69c0595bb3fde63fad.zip | |
ionic: change the descriptor ring length without full reset
The original way of changing ring length was to completely
tear down the lif's queue structure and then rebuild it, while
running the risk of allocations that might fail in the middle
and leave us with a broken driver.
Instead, we can set up all the new queue and descriptor
allocations first, then swap them out and delete the old
allocations. If the new allocations fail, we report the error,
stay with the old setup and continue running. This gives us
a safer path, and a smaller window of time where we're not
processing traffic.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/pensando/ionic/ionic_lif.h')
| -rw-r--r-- | drivers/net/ethernet/pensando/ionic/ionic_lif.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h index b8f774b1db3a..1df3e1e4107b 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h @@ -207,6 +207,22 @@ struct ionic_lif { struct work_struct tx_timeout_work; }; +struct ionic_queue_params { + unsigned int nxqs; + unsigned int ntxq_descs; + unsigned int nrxq_descs; + unsigned int intr_split; +}; + +static inline void ionic_init_queue_params(struct ionic_lif *lif, + struct ionic_queue_params *qparam) +{ + qparam->nxqs = lif->nxqs; + qparam->ntxq_descs = lif->ntxq_descs; + qparam->nrxq_descs = lif->nrxq_descs; + qparam->intr_split = test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state); +} + static inline u32 ionic_coal_usec_to_hw(struct ionic *ionic, u32 usecs) { u32 mult = le32_to_cpu(ionic->ident.dev.intr_coal_mult); @@ -241,7 +257,8 @@ int ionic_lif_identify(struct ionic *ionic, u8 lif_type, int ionic_lif_size(struct ionic *ionic); int ionic_lif_rss_config(struct ionic_lif *lif, u16 types, const u8 *key, const u32 *indir); - +int ionic_reconfigure_queues(struct ionic_lif *lif, + struct ionic_queue_params *qparam); int ionic_reset_queues(struct ionic_lif *lif, ionic_reset_cb cb, void *arg); static inline void debug_stats_txq_post(struct ionic_queue *q, bool dbell) |