diff options
| author | Raghu Vatsavayi <rvatsavayi@caviumnetworks.com> | 2016-12-07 17:54:35 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-12-08 19:21:39 +0100 |
| commit | 9981328a8722f0649190fdd7d027ee745fb01189 (patch) | |
| tree | c382ee9997153d9dd1020a9e9aa4da2c2d3a7738 /drivers/net/ethernet/cavium/liquidio/cn23xx_vf_device.c | |
| parent | liquidio CN23XX: VF scatter gather lists (diff) | |
| download | linux-9981328a8722f0649190fdd7d027ee745fb01189.tar.xz linux-9981328a8722f0649190fdd7d027ee745fb01189.zip | |
liquidio CN23XX: VF xmit
Adds support for transmit functionality in VF.
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cavium/liquidio/cn23xx_vf_device.c')
| -rw-r--r-- | drivers/net/ethernet/cavium/liquidio/cn23xx_vf_device.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cavium/liquidio/cn23xx_vf_device.c b/drivers/net/ethernet/cavium/liquidio/cn23xx_vf_device.c index 108e4878e608..b6117b6a1de2 100644 --- a/drivers/net/ethernet/cavium/liquidio/cn23xx_vf_device.c +++ b/drivers/net/ethernet/cavium/liquidio/cn23xx_vf_device.c @@ -529,6 +529,26 @@ static u64 cn23xx_vf_msix_interrupt_handler(void *dev) return ret; } +static u32 cn23xx_update_read_index(struct octeon_instr_queue *iq) +{ + u32 pkt_in_done = readl(iq->inst_cnt_reg); + u32 last_done; + u32 new_idx; + + last_done = pkt_in_done - iq->pkt_in_done; + iq->pkt_in_done = pkt_in_done; + + /* Modulo of the new index with the IQ size will give us + * the new index. The iq->reset_instr_cnt is always zero for + * cn23xx, so no extra adjustments are needed. + */ + new_idx = (iq->octeon_read_index + + (u32)(last_done & CN23XX_PKT_IN_DONE_CNT_MASK)) % + iq->max_count; + + return new_idx; +} + static void cn23xx_enable_vf_interrupt(struct octeon_device *oct, u8 intr_flag) { struct octeon_cn23xx_vf *cn23xx = (struct octeon_cn23xx_vf *)oct->chip; @@ -660,6 +680,7 @@ int cn23xx_setup_octeon_vf_device(struct octeon_device *oct) oct->fn_list.msix_interrupt_handler = cn23xx_vf_msix_interrupt_handler; oct->fn_list.setup_device_regs = cn23xx_setup_vf_device_regs; + oct->fn_list.update_iq_read_idx = cn23xx_update_read_index; oct->fn_list.enable_interrupt = cn23xx_enable_vf_interrupt; oct->fn_list.disable_interrupt = cn23xx_disable_vf_interrupt; |