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Better way to determine the status page length and rx pad boundary.

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This commit is contained in:
np 2012-06-23 22:12:27 +00:00
parent 16ef4a6c30
commit 25394a8913
1 changed files with 17 additions and 12 deletions
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29
sys/dev/cxgbe/t4_sge.c
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@ -70,12 +70,8 @@ enum {
FL_PKTSHIFT = 2
};
#define FL_ALIGN min(CACHE_LINE_SIZE, 32)
#if CACHE_LINE_SIZE > 64
#define SPG_LEN 128
#else
#define SPG_LEN 64
#endif
static int fl_pad = CACHE_LINE_SIZE;
static int spg_len = 64;
/* Used to track coalesced tx work request */
struct txpkts {
@ -167,6 +163,10 @@ static int handle_fw_rpl(struct sge_iq *, const struct rss_header *,
static int sysctl_uint16(SYSCTL_HANDLER_ARGS);
#if defined(__i386__) || defined(__amd64__)
extern u_int cpu_clflush_line_size;
#endif
/*
* Called on MOD_LOAD and fills up fl_buf_info[].
*/
@ -188,6 +188,11 @@ t4_sge_modload(void)
FL_BUF_TYPE(i) = m_gettype(bufsize[i]);
FL_BUF_ZONE(i) = m_getzone(bufsize[i]);
}
#if defined(__i386__) || defined(__amd64__)
fl_pad = max(cpu_clflush_line_size, 32);
spg_len = cpu_clflush_line_size > 64 ? 128 : 64;
#endif
}
/**
@ -209,8 +214,8 @@ t4_sge_init(struct adapter *sc)
V_INGPADBOUNDARY(M_INGPADBOUNDARY) |
F_EGRSTATUSPAGESIZE;
ctrl_val = V_PKTSHIFT(FL_PKTSHIFT) | F_RXPKTCPLMODE |
V_INGPADBOUNDARY(ilog2(FL_ALIGN) - 5) |
V_EGRSTATUSPAGESIZE(SPG_LEN == 128);
V_INGPADBOUNDARY(ilog2(fl_pad) - 5) |
V_EGRSTATUSPAGESIZE(spg_len == 128);
hpsize = V_HOSTPAGESIZEPF0(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF1(PAGE_SHIFT - 10) |
@ -1372,8 +1377,8 @@ t4_update_fl_bufsize(struct ifnet *ifp)
int i, bufsize;
/* large enough for a frame even when VLAN extraction is disabled */
bufsize = FL_PKTSHIFT + ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN +
ifp->if_mtu;
bufsize = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN + ifp->if_mtu;
bufsize = roundup(bufsize + FL_PKTSHIFT, fl_pad);
for_each_rxq(pi, i, rxq) {
fl = &rxq->fl;
@ -1570,7 +1575,7 @@ alloc_iq_fl(struct port_info *pi, struct sge_iq *iq, struct sge_fl *fl,
return (rc);
/* Allocate space for one software descriptor per buffer. */
fl->cap = (fl->qsize - SPG_LEN / RX_FL_ESIZE) * 8;
fl->cap = (fl->qsize - spg_len / RX_FL_ESIZE) * 8;
FL_LOCK(fl);
rc = alloc_fl_sdesc(fl);
FL_UNLOCK(fl);
@ -2070,7 +2075,7 @@ alloc_eq(struct adapter *sc, struct port_info *pi, struct sge_eq *eq)
if (rc)
return (rc);
eq->cap = eq->qsize - SPG_LEN / EQ_ESIZE;
eq->cap = eq->qsize - spg_len / EQ_ESIZE;
eq->spg = (void *)&eq->desc[eq->cap];
eq->avail = eq->cap - 1; /* one less to avoid cidx = pidx */
eq->pidx = eq->cidx = 0;