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osi: pass > mtu packets to sw without valid flag

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- Pass > mtu sized packets to sw driver without setting
  OSI_PKT_CX_VALID flag to let driver discard the packet and
  realloc buffer for descriptor.

Bug 4969187

Change-Id: Icd2b0a35ccb4364147b7c5b5e49410acebace228
Signed-off-by: Hareesh Kesireddy <hkesireddy@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/kernel/nvethernetrm/+/3257267
(cherry picked from commit 9625067d36dffcfd2db2eb2e6fc8a0a2a67f4d17)
Reviewed-on: https://git-master.nvidia.com/r/c/kernel/nvethernetrm/+/3258734
Reviewed-by: Bhadram Varka <vbhadram@nvidia.com>
Reviewed-by: Aniruddha Paul <anpaul@nvidia.com>
Reviewed-by: Ashutosh Jha <ajha@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Krishna Thota <kthota@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Hareesh Kesireddy
2024-11-26 06:57:57 +00:00
committed by mobile promotions
parent 593c8fc44c
commit 75d7479131
1 changed files with 6 additions and 5 deletions
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11
osi/dma/osi_dma_txrx.c
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@@ -320,15 +320,16 @@ nve32_t osi_process_rx_completions(struct osi_dma_priv_data *osi_dma,
* than 1 Rx desc. to place the larger packet and will set the
* LD bit in RDES3 accordingly.
* Restrict such Rx packets (which are longer than currently
* set MTU on DUT), and drop them in driver since HW cannot
* drop them. Also make use of swcx flags so that OSD can skip
* DMA buffer allocation and DMA mapping for those descriptors.
* If data is spread across multiple descriptors, drop packet
* set MTU on DUT), and pass them to driver as invalid packet
* since HW cannot drop them.
*/
if ((((rx_desc->rdes3 & RDES3_FD) == RDES3_FD) &&
((rx_desc->rdes3 & RDES3_LD) == RDES3_LD)) ==
BOOLEAN_FALSE) {
rx_swcx->flags |= OSI_RX_SWCX_REUSE;
rx_pkt_cx->flags &= ~OSI_PKT_CX_VALID;
rx_pkt_cx->pkt_len = rx_desc->rdes3 & RDES3_PKT_LEN;
osi_dma->osd_ops.receive_packet(osi_dma->osd, rx_ring, chan,
osi_dma->rx_buf_len, rx_pkt_cx, rx_swcx);
continue;
}