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;
 }
 
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