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Message-Id: <1423231375-28004-6-git-send-email-hariprasad@chelsio.com>
Date: Fri, 6 Feb 2015 19:32:55 +0530
From: Hariprasad Shenai <hariprasad@...lsio.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, leedom@...lsio.com, anish@...lsio.com,
nirranjan@...lsio.com, kumaras@...lsio.com,
Hariprasad Shenai <hariprasad@...lsio.com>
Subject: [PATCHv2 net-next 5/5] cxgb4: Add support in debugfs to dump the congestion control table
Dump Transport Processor modules congestion control configuration
Signed-off-by: Hariprasad Shenai <hariprasad@...lsio.com>
---
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | 1 +
drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c | 28 ++++++++++++++++++++
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 21 +++++++++++++++
drivers/net/ethernet/chelsio/cxgb4/t4_regs.h | 3 ++
4 files changed, 53 insertions(+), 0 deletions(-)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index b8fee60..d6cda17 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -1174,6 +1174,7 @@ void t4_read_cimq_cfg(struct adapter *adap, u16 *base, u16 *size, u16 *thres);
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);
void t4_read_mtu_tbl(struct adapter *adap, u16 *mtus, u8 *mtu_log);
+void t4_read_cong_tbl(struct adapter *adap, u16 incr[NMTUS][NCCTRL_WIN]);
void t4_tp_wr_bits_indirect(struct adapter *adap, unsigned int addr,
unsigned int mask, unsigned int val);
void t4_tp_read_la(struct adapter *adap, u64 *la_buf, unsigned int *wrptr);
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
index 83e2932..a1029ee 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
@@ -663,6 +663,33 @@ static const struct file_operations pm_stats_debugfs_fops = {
.write = pm_stats_clear
};
+static int cctrl_tbl_show(struct seq_file *seq, void *v)
+{
+ static const char * const dec_fac[] = {
+ "0.5", "0.5625", "0.625", "0.6875", "0.75", "0.8125", "0.875",
+ "0.9375" };
+
+ int i;
+ u16 incr[NMTUS][NCCTRL_WIN];
+ struct adapter *adap = seq->private;
+
+ t4_read_cong_tbl(adap, incr);
+
+ for (i = 0; i < NCCTRL_WIN; ++i) {
+ seq_printf(seq, "%2d: %4u %4u %4u %4u %4u %4u %4u %4u\n", i,
+ incr[0][i], incr[1][i], incr[2][i], incr[3][i],
+ incr[4][i], incr[5][i], incr[6][i], incr[7][i]);
+ seq_printf(seq, "%8u %4u %4u %4u %4u %4u %4u %4u %5u %s\n",
+ incr[8][i], incr[9][i], incr[10][i], incr[11][i],
+ incr[12][i], incr[13][i], incr[14][i], incr[15][i],
+ adap->params.a_wnd[i],
+ dec_fac[adap->params.b_wnd[i]]);
+ }
+ return 0;
+}
+
+DEFINE_SIMPLE_DEBUGFS_FILE(cctrl_tbl);
+
/* Format a value in a unit that differs from the value's native unit by the
* given factor.
*/
@@ -1990,6 +2017,7 @@ int t4_setup_debugfs(struct adapter *adap)
{ "ulprx_la", &ulprx_la_fops, S_IRUSR, 0 },
{ "sensors", &sensors_debugfs_fops, S_IRUSR, 0 },
{ "pm_stats", &pm_stats_debugfs_fops, S_IRUSR, 0 },
+ { "cctrl", &cctrl_tbl_debugfs_fops, S_IRUSR, 0 },
#if IS_ENABLED(CONFIG_IPV6)
{ "clip_tbl", &clip_tbl_debugfs_fops, S_IRUSR, 0 },
#endif
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index 5871c00..4d643b6 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -2456,6 +2456,27 @@ void t4_read_mtu_tbl(struct adapter *adap, u16 *mtus, u8 *mtu_log)
}
/**
+ * t4_read_cong_tbl - reads the congestion control table
+ * @adap: the adapter
+ * @incr: where to store the alpha values
+ *
+ * Reads the additive increments programmed into the HW congestion
+ * control table.
+ */
+void t4_read_cong_tbl(struct adapter *adap, u16 incr[NMTUS][NCCTRL_WIN])
+{
+ unsigned int mtu, w;
+
+ for (mtu = 0; mtu < NMTUS; ++mtu)
+ for (w = 0; w < NCCTRL_WIN; ++w) {
+ t4_write_reg(adap, TP_CCTRL_TABLE_A,
+ ROWINDEX_V(0xffff) | (mtu << 5) | w);
+ incr[mtu][w] = (u16)t4_read_reg(adap,
+ TP_CCTRL_TABLE_A) & 0x1fff;
+ }
+}
+
+/**
* t4_tp_wr_bits_indirect - set/clear bits in an indirect TP register
* @adap: the adapter
* @addr: the indirect TP register address
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h b/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
index 3f18d5c..231a725 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
@@ -1292,6 +1292,9 @@
#define KEEPALIVEMAXR2_V(x) ((x) << KEEPALIVEMAXR2_S)
#define KEEPALIVEMAXR2_G(x) (((x) >> KEEPALIVEMAXR2_S) & KEEPALIVEMAXR2_M)
+#define ROWINDEX_S 16
+#define ROWINDEX_V(x) ((x) << ROWINDEX_S)
+
#define TP_CCTRL_TABLE_A 0x7ddc
#define TP_MTU_TABLE_A 0x7de4
--
1.7.1
--
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