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Date: Mon, 4 May 2015 21:58:16 +0530
From: Hariprasad Shenai <hariprasad@...lsio.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, leedom@...lsio.com, nirranjan@...lsio.com,
Hariprasad Shenai <hariprasad@...lsio.com>
Subject: [PATCH net-next 2/6] cxgb4: Enable congestion notification from SGE for IQs and FLs.
Also changed the name of t4_hw.c:get_mps_bg_map() to t4_get_mps_bg_map()
and make it an exported routine with a definition in cxgb4.h.
Signed-off-by: Hariprasad Shenai <hariprasad@...lsio.com>
---
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | 3 ++-
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 14 ++++++++------
drivers/net/ethernet/chelsio/cxgb4/sge.c | 14 ++++++++++++--
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 6 +++---
drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h | 2 ++
5 files changed, 27 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index 524d110..b6fa958 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -1055,7 +1055,7 @@ int t4_mgmt_tx(struct adapter *adap, struct sk_buff *skb);
int t4_ofld_send(struct adapter *adap, struct sk_buff *skb);
int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq,
struct net_device *dev, int intr_idx,
- struct sge_fl *fl, rspq_handler_t hnd);
+ struct sge_fl *fl, rspq_handler_t hnd, int cong);
int t4_sge_alloc_eth_txq(struct adapter *adap, struct sge_eth_txq *txq,
struct net_device *dev, struct netdev_queue *netdevq,
unsigned int iqid);
@@ -1215,6 +1215,7 @@ int t4_mc_read(struct adapter *adap, int idx, u32 addr, __be32 *data,
u64 *parity);
int t4_edc_read(struct adapter *adap, int idx, u32 addr, __be32 *data,
u64 *parity);
+unsigned int t4_get_mps_bg_map(struct adapter *adapter, int idx);
void t4_pmtx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[]);
void t4_pmrx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[]);
int t4_read_cim_ibq(struct adapter *adap, unsigned int qid, u32 *data,
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 803d91b..83cfded 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -977,7 +977,7 @@ static int alloc_ofld_rxqs(struct adapter *adap, struct sge_ofld_rxq *q,
err = t4_sge_alloc_rxq(adap, &q->rspq, false,
adap->port[i / per_chan],
msi_idx, q->fl.size ? &q->fl : NULL,
- uldrx_handler);
+ uldrx_handler, 0);
if (err)
return err;
memset(&q->stats, 0, sizeof(q->stats));
@@ -1007,7 +1007,7 @@ static int setup_sge_queues(struct adapter *adap)
msi_idx = 1; /* vector 0 is for non-queue interrupts */
else {
err = t4_sge_alloc_rxq(adap, &s->intrq, false, adap->port[0], 0,
- NULL, NULL);
+ NULL, NULL, -1);
if (err)
return err;
msi_idx = -((int)s->intrq.abs_id + 1);
@@ -1027,7 +1027,7 @@ static int setup_sge_queues(struct adapter *adap)
* new/deleted queues.
*/
err = t4_sge_alloc_rxq(adap, &s->fw_evtq, true, adap->port[0],
- msi_idx, NULL, fwevtq_handler);
+ msi_idx, NULL, fwevtq_handler, -1);
if (err) {
freeout: t4_free_sge_resources(adap);
return err;
@@ -1042,9 +1042,11 @@ freeout: t4_free_sge_resources(adap);
for (j = 0; j < pi->nqsets; j++, q++) {
if (msi_idx > 0)
msi_idx++;
- err = t4_sge_alloc_rxq(adap, &q->rspq, false, dev,
- msi_idx, &q->fl,
- t4_ethrx_handler);
+ err = t4_sge_alloc_rxq
+ (adap, &q->rspq, false, dev,
+ msi_idx, &q->fl,
+ t4_ethrx_handler,
+ t4_get_mps_bg_map(adap, pi->tx_chan));
if (err)
goto freeout;
q->rspq.idx = j;
diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index 517d5b4..7547a9c 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -2437,9 +2437,12 @@ static void __iomem *bar2_address(struct adapter *adapter,
return adapter->bar2 + bar2_qoffset;
}
+/* @intr_idx: MSI/MSI-X vector if >=0, -(absolute qid + 1) if < 0
+ * @cong: < 0 -> no congestion feedback, >= 0 -> congestion channel map
+ */
int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq,
struct net_device *dev, int intr_idx,
- struct sge_fl *fl, rspq_handler_t hnd)
+ struct sge_fl *fl, rspq_handler_t hnd, int cong)
{
int ret, flsz = 0;
struct fw_iq_cmd c;
@@ -2471,6 +2474,8 @@ int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq,
FW_IQ_CMD_IQESIZE_V(ilog2(iq->iqe_len) - 4));
c.iqsize = htons(iq->size);
c.iqaddr = cpu_to_be64(iq->phys_addr);
+ if (cong >= 0)
+ c.iqns_to_fl0congen = htonl(FW_IQ_CMD_IQFLINTCONGEN_F);
if (fl) {
/* Allocate the ring for the hardware free list (with space
@@ -2490,10 +2495,15 @@ int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq,
goto fl_nomem;
flsz = fl->size / 8 + s->stat_len / sizeof(struct tx_desc);
- c.iqns_to_fl0congen = htonl(FW_IQ_CMD_FL0PACKEN_F |
+ c.iqns_to_fl0congen |= htonl(FW_IQ_CMD_FL0PACKEN_F |
FW_IQ_CMD_FL0FETCHRO_F |
FW_IQ_CMD_FL0DATARO_F |
FW_IQ_CMD_FL0PADEN_F);
+ if (cong >= 0)
+ c.iqns_to_fl0congen |=
+ htonl(FW_IQ_CMD_FL0CNGCHMAP_V(cong) |
+ FW_IQ_CMD_FL0CONGCIF_F |
+ FW_IQ_CMD_FL0CONGEN_F);
c.fl0dcaen_to_fl0cidxfthresh = htons(FW_IQ_CMD_FL0FBMIN_V(2) |
FW_IQ_CMD_FL0FBMAX_V(3));
c.fl0size = htons(flsz);
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index e8578a7..8ba91c3 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -3401,7 +3401,7 @@ void t4_pmrx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[])
}
/**
- * get_mps_bg_map - return the buffer groups associated with a port
+ * t4_get_mps_bg_map - return the buffer groups associated with a port
* @adap: the adapter
* @idx: the port index
*
@@ -3409,7 +3409,7 @@ void t4_pmrx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[])
* with the given port. Bit i is set if buffer group i is used by the
* port.
*/
-static unsigned int get_mps_bg_map(struct adapter *adap, int idx)
+unsigned int t4_get_mps_bg_map(struct adapter *adap, int idx)
{
u32 n = NUMPORTS_G(t4_read_reg(adap, MPS_CMN_CTL_A));
@@ -3460,7 +3460,7 @@ const char *t4_get_port_type_description(enum fw_port_type port_type)
*/
void t4_get_port_stats(struct adapter *adap, int idx, struct port_stats *p)
{
- u32 bgmap = get_mps_bg_map(adap, idx);
+ u32 bgmap = t4_get_mps_bg_map(adap, idx);
#define GET_STAT(name) \
t4_read_reg64(adap, \
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
index 03fbfd1..e34efb7 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
@@ -1377,6 +1377,7 @@ struct fw_iq_cmd {
#define FW_IQ_CMD_IQFLINTCONGEN_S 27
#define FW_IQ_CMD_IQFLINTCONGEN_V(x) ((x) << FW_IQ_CMD_IQFLINTCONGEN_S)
+#define FW_IQ_CMD_IQFLINTCONGEN_F FW_IQ_CMD_IQFLINTCONGEN_V(1U)
#define FW_IQ_CMD_IQFLINTISCSIC_S 26
#define FW_IQ_CMD_IQFLINTISCSIC_V(x) ((x) << FW_IQ_CMD_IQFLINTISCSIC_S)
@@ -1399,6 +1400,7 @@ struct fw_iq_cmd {
#define FW_IQ_CMD_FL0CONGCIF_S 11
#define FW_IQ_CMD_FL0CONGCIF_V(x) ((x) << FW_IQ_CMD_FL0CONGCIF_S)
+#define FW_IQ_CMD_FL0CONGCIF_F FW_IQ_CMD_FL0CONGCIF_V(1U)
#define FW_IQ_CMD_FL0ONCHIP_S 10
#define FW_IQ_CMD_FL0ONCHIP_V(x) ((x) << FW_IQ_CMD_FL0ONCHIP_S)
--
2.3.4
--
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