svn commit: r285648 - in head/sys/dev/cxgbe: . common

[Navdeep Parhar]

Author: np
Date: Fri Jul 17 06:46:18 2015
New Revision: 285648
URL: https://svnweb.freebsd.org/changeset/base/285648

Log:
  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

Modified:
  head/sys/dev/cxgbe/adapter.h
  head/sys/dev/cxgbe/common/t4_hw.c

Modified: head/sys/dev/cxgbe/adapter.h
==============================================================================
--- head/sys/dev/cxgbe/adapter.h	Fri Jul 17 06:34:46 2015	(r285647)
+++ head/sys/dev/cxgbe/adapter.h	Fri Jul 17 06:46:18 2015	(r285648)
@@ -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;

Modified: head/sys/dev/cxgbe/common/t4_hw.c
==============================================================================
--- head/sys/dev/cxgbe/common/t4_hw.c	Fri Jul 17 06:34:46 2015	(r285647)
+++ head/sys/dev/cxgbe/common/t4_hw.c	Fri Jul 17 06:46:18 2015	(r285648)
@@ -5699,6 +5699,7 @@ int __devinit t4_port_init(struct port_i
 	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_i
 
 	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;
 }