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authorKaren Xie <kxie@chelsio.com>2015-04-10 13:57:12 -0700
committerJames Bottomley <JBottomley@Odin.com>2015-05-25 08:46:24 -0700
commit81daf10c76770ef9fbb59f4d024f67517edf21d3 (patch)
tree3268a415562369642fe5bfedbfe223edf1759e5b /drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
parentdee0586e15d5d5796dd76bdc0ecfb7df7c5ee1c8 (diff)
download96b-common-81daf10c76770ef9fbb59f4d024f67517edf21d3.tar.gz
cxgbi: use per-connection link-speed dependent send/recv windows
For adapters supporting both 10G and 40G use per-connection send/recv window and calculate the size based on the link speed. Signed-off-by: Karen Xie <kxie@chelsio.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Odin.com>
Diffstat (limited to 'drivers/scsi/cxgbi/cxgb4i/cxgb4i.c')
-rw-r--r--drivers/scsi/cxgbi/cxgb4i/cxgb4i.c37
1 files changed, 27 insertions, 10 deletions
diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
index dd00e5fe4a5e..9147ae43a8c0 100644
--- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -50,11 +50,13 @@ MODULE_LICENSE("GPL");
module_param(dbg_level, uint, 0644);
MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
-static int cxgb4i_rcv_win = 256 * 1024;
+#define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024)
+static int cxgb4i_rcv_win = -1;
module_param(cxgb4i_rcv_win, int, 0644);
MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
-static int cxgb4i_snd_win = 128 * 1024;
+#define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024)
+static int cxgb4i_snd_win = -1;
module_param(cxgb4i_snd_win, int, 0644);
MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
@@ -196,7 +198,7 @@ static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
TX_CHAN_V(csk->tx_chan) |
SMAC_SEL_V(csk->smac_idx) |
ULP_MODE_V(ULP_MODE_ISCSI) |
- RCV_BUFSIZ_V(cxgb4i_rcv_win >> 10);
+ RCV_BUFSIZ_V(csk->rcv_win >> 10);
opt2 = RX_CHANNEL_V(0) |
RSS_QUEUE_VALID_F |
(RX_FC_DISABLE_F) |
@@ -279,7 +281,7 @@ static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
TX_CHAN_V(csk->tx_chan) |
SMAC_SEL_V(csk->smac_idx) |
ULP_MODE_V(ULP_MODE_ISCSI) |
- RCV_BUFSIZ_V(cxgb4i_rcv_win >> 10);
+ RCV_BUFSIZ_V(csk->rcv_win >> 10);
opt2 = RX_CHANNEL_V(0) |
RSS_QUEUE_VALID_F |
@@ -544,7 +546,7 @@ static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
flowc->mnemval[5].val = htonl(csk->rcv_nxt);
flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
- flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
+ flowc->mnemval[6].val = htonl(csk->snd_win);
flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
flowc->mnemval[7].val = htonl(csk->advmss);
flowc->mnemval[8].mnemonic = 0;
@@ -557,7 +559,7 @@ static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
- csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
+ csk->snd_nxt, csk->rcv_nxt, csk->snd_win,
csk->advmss);
cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
@@ -750,8 +752,8 @@ static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
* Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
* pass through opt0.
*/
- if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
- csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
+ if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
+ csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
if (TCPOPT_TSTAMP_G(tcp_opt))
@@ -1367,6 +1369,8 @@ static int init_act_open(struct cxgbi_sock *csk)
unsigned int step;
unsigned int size, size6;
int t4 = is_t4(lldi->adapter_type);
+ unsigned int linkspeed;
+ unsigned int rcv_winf, snd_winf;
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p,%u,0x%lx,%u.\n",
@@ -1440,6 +1444,21 @@ static int init_act_open(struct cxgbi_sock *csk)
csk->txq_idx = cxgb4_port_idx(ndev) * step;
step = lldi->nrxq / lldi->nchan;
csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
+ linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
+ csk->snd_win = cxgb4i_snd_win;
+ csk->rcv_win = cxgb4i_rcv_win;
+ if (cxgb4i_rcv_win <= 0) {
+ csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
+ rcv_winf = linkspeed / SPEED_10000;
+ if (rcv_winf)
+ csk->rcv_win *= rcv_winf;
+ }
+ if (cxgb4i_snd_win <= 0) {
+ csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
+ snd_winf = linkspeed / SPEED_10000;
+ if (snd_winf)
+ csk->snd_win *= snd_winf;
+ }
csk->wr_cred = lldi->wr_cred -
DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
csk->wr_max_cred = csk->wr_cred;
@@ -1758,8 +1777,6 @@ static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
cdev->nports = lldi->nports;
cdev->mtus = lldi->mtus;
cdev->nmtus = NMTUS;
- cdev->snd_win = cxgb4i_snd_win;
- cdev->rcv_win = cxgb4i_rcv_win;
cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);