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cxgb4: Query firmware for T5 ULPTX MEMWRITE DSGL capabilities 

Query firmware to see whether we're allowed to use T5 ULPTX MEMWRITE DSGL
capabilities.  Also pass that information to Upper Layer Drivers via the
new (struct cxgb4_lld_info).ulptx_memwrite_dsgl boolean.

Based on original work by Casey Leedom <leedom@chelsio.com>

Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Kumar Sanghvi 2014-02-18 17:56:12 +05:30 committed by David S. Miller
parent 4fe44dd776
commit 1ac0f09563
4 changed files with 19 additions and 0 deletions
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1
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
View File

@ -308,6 +308,7 @@ struct adapter_params {
unsigned char bypass;
unsigned int ofldq_wr_cred;
bool ulptx_memwrite_dsgl; /* use of T5 DSGL allowed */
};
#include "t4fw_api.h"

16
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
View File

@ -3776,6 +3776,7 @@ static void uld_attach(struct adapter *adap, unsigned int uld)
lli.dbfifo_int_thresh = dbfifo_int_thresh;
lli.sge_pktshift = adap->sge.pktshift;
lli.enable_fw_ofld_conn = adap->flags & FW_OFLD_CONN;
lli.ulptx_memwrite_dsgl = adap->params.ulptx_memwrite_dsgl;
handle = ulds[uld].add(&lli);
if (IS_ERR(handle)) {
@ -5380,6 +5381,21 @@ static int adap_init0(struct adapter *adap)
val[0] = 1;
(void) t4_set_params(adap, adap->mbox, adap->fn, 0, 1, params, val);
/*
* Find out whether we're allowed to use the T5+ ULPTX MEMWRITE DSGL
* capability. Earlier versions of the firmware didn't have the
* ULPTX_MEMWRITE_DSGL so we'll interpret a query failure as no
* permission to use ULPTX MEMWRITE DSGL.
*/
if (is_t4(adap->params.chip)) {
adap->params.ulptx_memwrite_dsgl = false;
} else {
params[0] = FW_PARAM_DEV(ULPTX_MEMWRITE_DSGL);
ret = t4_query_params(adap, adap->mbox, adap->fn, 0,
1, params, val);
adap->params.ulptx_memwrite_dsgl = (ret == 0 && val[0] != 0);
}
/*
* Get device capabilities so we can determine what resources we need
* to manage.

1
drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h
View File

@ -253,6 +253,7 @@ struct cxgb4_lld_info {
/* packet data */
bool enable_fw_ofld_conn; /* Enable connection through fw */
/* WR */
bool ulptx_memwrite_dsgl; /* use of T5 DSGL allowed */
};
struct cxgb4_uld_info {

1
drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
View File

@ -932,6 +932,7 @@ enum fw_params_param_dev {
FW_PARAMS_PARAM_DEV_FWREV = 0x0B,
FW_PARAMS_PARAM_DEV_TPREV = 0x0C,
FW_PARAMS_PARAM_DEV_CF = 0x0D,
FW_PARAMS_PARAM_DEV_ULPTX_MEMWRITE_DSGL = 0x17,
};
/*