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Fix qlnx_tso_check() so that every window of

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(ETH_TX_LSO_WINDOW_BDS_NUM - nbds_in_hdr) has atleast
ETH_TX_LSO_WINDOW_MIN_LEN bytes

MFC after:5 days
This commit is contained in:
David C Somayajulu 2017-08-24 19:09:42 +00:00
parent 0c1d923efb
commit b1c4d096e6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=322852
1 changed files with 22 additions and 11 deletions
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33
sys/dev/qlnx/qlnxe/qlnx_os.c
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@ -2921,25 +2921,35 @@ qlnx_tso_check(struct qlnx_fastpath *fp, bus_dma_segment_t *segs, int nsegs,
{ {
int i; int i;
uint32_t sum, nbds_in_hdr = 1; uint32_t sum, nbds_in_hdr = 1;
bus_dma_segment_t *t_segs = segs; uint32_t window;
bus_dma_segment_t *s_seg;
/* count the number of segments spanned by TCP header */ /* If the header spans mulitple segments, skip those segments */
if (nsegs < ETH_TX_LSO_WINDOW_BDS_NUM)
return (0);
i = 0; i = 0;
while ((i < nsegs) && (offset > t_segs->ds_len)) {
nbds_in_hdr++; while ((i < nsegs) && (offset >= segs->ds_len)) {
offset = offset - t_segs->ds_len; offset = offset - segs->ds_len;
t_segs++; segs++;
i++; i++;
nbds_in_hdr++;
} }
while (nsegs >= QLNX_MAX_SEGMENTS_NON_TSO) { window = ETH_TX_LSO_WINDOW_BDS_NUM - nbds_in_hdr;
nsegs = nsegs - i;
while (nsegs >= window) {
sum = 0; sum = 0;
s_seg = segs;
for (i = 0; i < (ETH_TX_LSO_WINDOW_BDS_NUM - nbds_in_hdr); i++){ for (i = 0; i < window; i++){
sum += segs->ds_len; sum += s_seg->ds_len;
segs++; s_seg++;
} }
if (sum < ETH_TX_LSO_WINDOW_MIN_LEN) { if (sum < ETH_TX_LSO_WINDOW_MIN_LEN) {
@ -2947,7 +2957,8 @@ qlnx_tso_check(struct qlnx_fastpath *fp, bus_dma_segment_t *segs, int nsegs,
return (-1); return (-1);
} }
nsegs -= QLNX_MAX_SEGMENTS_NON_TSO; nsegs = nsegs - 1;
segs++;
} }
return (0); return (0);