cxgbe(4): Ask the firmware for the start of the RSS slice for a port and

save it for later.  This enables direct manipulation of the indirection
tables (although the stock driver doesn't do that right now).

MFC after:	1 month

2 files changed, 13 insertions, 0 deletions

diff --git a/sys/dev/cxgbe/adapter.h b/sys/dev/cxgbe/adapter.h
index 0ec89e8..9390c51 100644
--- a/sys/dev/cxgbe/adapter.h
+++ b/sys/dev/cxgbe/adapter.h
@@ -233,6 +233,7 @@ struct port_info {
 	uint16_t viid;
 	int16_t  xact_addr_filt;/* index of exact MAC address filter */
 	uint16_t rss_size;	/* size of VI's RSS table slice */
+	uint16_t rss_base;	/* start of VI's RSS table slice */
 	uint8_t  lport;		/* associated offload logical port */
 	int8_t   mdio_addr;
 	uint8_t  port_type;
diff --git a/sys/dev/cxgbe/common/t4_hw.c b/sys/dev/cxgbe/common/t4_hw.c
index d140276..7954188 100644
--- a/sys/dev/cxgbe/common/t4_hw.c
+++ b/sys/dev/cxgbe/common/t4_hw.c
@@ -5699,6 +5699,7 @@ int __devinit t4_port_init(struct port_info *p, int mbox, int pf, int vf)
 	struct fw_port_cmd c;
 	u16 rss_size;
 	adapter_t *adap = p->adapter;
+	u32 param, val;
 
 	memset(&c, 0, sizeof(c));
 
@@ -5737,6 +5738,17 @@ int __devinit t4_port_init(struct port_info *p, int mbox, int pf, int vf)
 
 	init_link_config(&p->link_cfg, ntohs(c.u.info.pcap));
 
+	param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
+	    V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_RSSINFO) |
+	    V_FW_PARAMS_PARAM_YZ(p->viid);
+	ret = t4_query_params(adap, mbox, pf, vf, 1, &param, &val);
+	if (ret)
+		p->rss_base = 0xffff;
+	else {
+		/* MPASS((val >> 16) == rss_size); */
+		p->rss_base = val & 0xffff;
+	}
+
 	return 0;
 }