diff options
| author |   Satanand Burla <satananda.burla@cavium.com> | 2017-03-22 11:31:13 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-03-22 19:36:43 -0700 |
| commit | 031d4f1210a0401e938a27b229de2e9839311cde (patch) | |
| tree | 70becf8b6c37df1460c7aefe76633db5a210f3c3 /drivers/net/ethernet/cavium/liquidio/octeon_droq.c | |
| parent | net: vmxnet3: use new api ethtool_{get|set}_link_ksettings (diff) | |
| download | linux-dev-031d4f1210a0401e938a27b229de2e9839311cde.tar.xz linux-dev-031d4f1210a0401e938a27b229de2e9839311cde.zip | |
liquidio: allocate RX buffers in OOM conditions in PF and VF
Add workqueue that is periodically run to try to allocate RX buffers in OOM
conditions in PF and VF.
Signed-off-by: Satanand Burla <satananda.burla@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cavium/liquidio/octeon_droq.c')
| -rw-r--r-- | drivers/net/ethernet/cavium/liquidio/octeon_droq.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_droq.c b/drivers/net/ethernet/cavium/liquidio/octeon_droq.c index 00970597ada8..286be5539cef 100644 --- a/drivers/net/ethernet/cavium/liquidio/octeon_droq.c +++ b/drivers/net/ethernet/cavium/liquidio/octeon_droq.c @@ -513,6 +513,32 @@ octeon_droq_refill(struct octeon_device *octeon_dev, struct octeon_droq *droq) return desc_refilled; } +/** check if we can allocate packets to get out of oom. + * @param droq - Droq being checked. + * @return does not return anything + */ +void octeon_droq_check_oom(struct octeon_droq *droq) +{ + int desc_refilled; + struct octeon_device *oct = droq->oct_dev; + + if (readl(droq->pkts_credit_reg) <= CN23XX_SLI_DEF_BP) { + spin_lock_bh(&droq->lock); + desc_refilled = octeon_droq_refill(oct, droq); + if (desc_refilled) { + /* Flush the droq descriptor data to memory to be sure + * that when we update the credits the data in memory + * is accurate. + */ + wmb(); + writel(desc_refilled, droq->pkts_credit_reg); + /* make sure mmio write completes */ + mmiowb(); + } + spin_unlock_bh(&droq->lock); + } +} + static inline u32 octeon_droq_get_bufcount(u32 buf_size, u32 total_len) { |