[PATCH net-next V3 17/18] liquidio: CN23XX napi support
From: Raghu Vatsavayi <hidden>
Date: 2016-08-22 00:28:39
Subsystem:
cavium liquidio network driver, networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This patch adds NAPI related support for cn23xx device. Signed-off-by: Derek Chickles <redacted> Signed-off-by: Satanand Burla <redacted> Signed-off-by: Felix Manlunas <redacted> Signed-off-by: Raghu Vatsavayi <redacted> --- drivers/net/ethernet/cavium/liquidio/lio_main.c | 10 ++++++---- drivers/net/ethernet/cavium/liquidio/octeon_device.c | 19 +++++++++++++++++++ drivers/net/ethernet/cavium/liquidio/octeon_droq.c | 7 +++++-- 3 files changed, 30 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index a875398..dc57b39 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c@@ -999,8 +999,7 @@ int liquidio_schedule_msix_droq_pkt_handler(struct octeon_droq *droq, u64 ret) * \brief Droq packet processor sceduler * @param oct octeon device */ -static -void liquidio_schedule_droq_pkt_handlers(struct octeon_device *oct) +static void liquidio_schedule_droq_pkt_handlers(struct octeon_device *oct) { struct octeon_device_priv *oct_priv = (struct octeon_device_priv *)oct->priv;
@@ -2372,11 +2371,14 @@ static void napi_schedule_wrapper(void *param) */ static void liquidio_napi_drv_callback(void *arg) { + struct octeon_device *oct; struct octeon_droq *droq = arg; int this_cpu = smp_processor_id(); - if (droq->cpu_id == this_cpu) { - napi_schedule(&droq->napi); + oct = droq->oct_dev; + + if (OCTEON_CN23XX_PF(oct) || droq->cpu_id == this_cpu) { + napi_schedule_irqoff(&droq->napi); } else { struct call_single_data *csd = &droq->csd;
diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_device.c b/drivers/net/ethernet/cavium/liquidio/octeon_device.c
index 85e3123..586b688 100644
--- a/drivers/net/ethernet/cavium/liquidio/octeon_device.c
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_device.c@@ -1301,17 +1301,36 @@ int lio_get_device_id(void *dev) void lio_enable_irq(struct octeon_droq *droq, struct octeon_instr_queue *iq) { + u64 instr_cnt; + struct octeon_device *oct = NULL; + /* the whole thing needs to be atomic, ideally */ if (droq) { spin_lock_bh(&droq->lock); writel(droq->pkt_count, droq->pkts_sent_reg); droq->pkt_count = 0; spin_unlock_bh(&droq->lock); + oct = droq->oct_dev; } if (iq) { spin_lock_bh(&iq->lock); writel(iq->pkt_in_done, iq->inst_cnt_reg); iq->pkt_in_done = 0; spin_unlock_bh(&iq->lock); + oct = iq->oct_dev; + } + /*write resend. Writing RESEND in SLI_PKTX_CNTS should be enough + *to trigger tx interrupts as well, if they are pending. + */ + if (oct && OCTEON_CN23XX_PF(oct)) { + if (droq) + writeq(CN23XX_INTR_RESEND, droq->pkts_sent_reg); + /*we race with firmrware here. read and write the IN_DONE_CNTS*/ + else if (iq) { + instr_cnt = readq(iq->inst_cnt_reg); + writeq(((instr_cnt & 0xFFFFFFFF00000000ULL) | + CN23XX_INTR_RESEND), + iq->inst_cnt_reg); + } } }
diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_droq.c b/drivers/net/ethernet/cavium/liquidio/octeon_droq.c
index 8848ce2..f60e532 100644
--- a/drivers/net/ethernet/cavium/liquidio/octeon_droq.c
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_droq.c@@ -573,7 +573,7 @@ octeon_droq_dispatch_pkt(struct octeon_device *oct, (unsigned int)rh->r.opcode, (unsigned int)rh->r.subcode); droq->stats.dropped_nodispatch++; - } /* else (dispatch_fn ... */ + } return cnt; }
@@ -887,8 +887,11 @@ octeon_process_droq_poll_cmd(struct octeon_device *oct, u32 q_no, int cmd, return 0; } break; + case OCTEON_CN23XX_PF_VID: { + lio_enable_irq(oct->droq[q_no], oct->instr_queue[q_no]); + } + break; } - return 0; }
--
1.8.3.1