diff options
| author | Sunil Goutham <sgoutham@cavium.com> | 2017-05-02 16:06:54 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-02 22:41:21 +0300 |
| commit | 05c773f52b96ef3fbc7d9bfa21caadc6247ef7a8 (patch) | |
| tree | 9d20a83f0b3f08bd3fcd3d0c00920abaa19dfb8c /drivers/net/ethernet/cavium/thunder/nicvf_queues.c | |
| parent | 927987f39f116db477fcd74ced2a2aea940e585c (diff) | |
| download | linux-05c773f52b96ef3fbc7d9bfa21caadc6247ef7a8.tar.xz | |
net: thunderx: Add basic XDP support
Adds basic XDP support i.e attaching a BPF program to an
interface. Also takes care of allocating separate Tx queues
for XDP path and for network stack packet transmission.
This patch doesn't support handling of any of the XDP actions,
all are treated as XDP_PASS i.e packets will be handed over to
the network stack.
Changes also involve allocating one receive buffer per page in XDP
mode and multiple in normal mode i.e when no BPF program is attached.
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cavium/thunder/nicvf_queues.c')
| -rw-r--r-- | drivers/net/ethernet/cavium/thunder/nicvf_queues.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c index e4a02a96d4f0..8c3c571568aa 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c @@ -19,14 +19,6 @@ #include "q_struct.h" #include "nicvf_queues.h" -static inline u64 nicvf_iova_to_phys(struct nicvf *nic, dma_addr_t dma_addr) -{ - /* Translation is installed only when IOMMU is present */ - if (nic->iommu_domain) - return iommu_iova_to_phys(nic->iommu_domain, dma_addr); - return dma_addr; -} - static void nicvf_get_page(struct nicvf *nic) { if (!nic->rb_pageref || !nic->rb_page) @@ -149,8 +141,10 @@ static inline int nicvf_alloc_rcv_buffer(struct nicvf *nic, struct rbdr *rbdr, { struct pgcache *pgcache = NULL; - /* Check if request can be accomodated in previous allocated page */ - if (nic->rb_page && + /* Check if request can be accomodated in previous allocated page. + * But in XDP mode only one buffer per page is permitted. + */ + if (!nic->pnicvf->xdp_prog && nic->rb_page && ((nic->rb_page_offset + buf_len) <= PAGE_SIZE)) { nic->rb_pageref++; goto ret; @@ -961,6 +955,7 @@ int nicvf_set_qset_resources(struct nicvf *nic) nic->rx_queues = qs->rq_cnt; nic->tx_queues = qs->sq_cnt; + nic->xdp_tx_queues = 0; return 0; } |