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/*
* QLogic qlcnic NIC Driver
* Copyright (c) 2009-2013 QLogic Corporation
*
* See LICENSE.qlcnic for copyright and licensing details.
*/
#include "qlcnic.h"
#define QLC_DCB_MAX_TC 0x8
#define QLC_DCB_TSA_SUPPORT(V) (V & 0x1)
#define QLC_DCB_ETS_SUPPORT(V) ((V >> 1) & 0x1)
#define QLC_DCB_VERSION_SUPPORT(V) ((V >> 2) & 0xf)
#define QLC_DCB_MAX_NUM_TC(V) ((V >> 20) & 0xf)
#define QLC_DCB_MAX_NUM_ETS_TC(V) ((V >> 24) & 0xf)
#define QLC_DCB_MAX_NUM_PFC_TC(V) ((V >> 28) & 0xf)
static void __qlcnic_dcb_free(struct qlcnic_adapter *);
static int __qlcnic_dcb_attach(struct qlcnic_adapter *);
static int __qlcnic_dcb_query_hw_capability(struct qlcnic_adapter *, char *);
static void __qlcnic_dcb_get_info(struct qlcnic_adapter *);
static int qlcnic_82xx_dcb_get_hw_capability(struct qlcnic_adapter *);
static int qlcnic_83xx_dcb_get_hw_capability(struct qlcnic_adapter *);
struct qlcnic_dcb_capability {
bool tsa_capability;
bool ets_capability;
u8 max_num_tc;
u8 max_ets_tc;
u8 max_pfc_tc;
u8 dcb_capability;
};
struct qlcnic_dcb_cfg {
struct qlcnic_dcb_capability capability;
u32 version;
};
static struct qlcnic_dcb_ops qlcnic_83xx_dcb_ops = {
.free = __qlcnic_dcb_free,
.attach = __qlcnic_dcb_attach,
.query_hw_capability = __qlcnic_dcb_query_hw_capability,
.get_info = __qlcnic_dcb_get_info,
.get_hw_capability = qlcnic_83xx_dcb_get_hw_capability,
};
static struct qlcnic_dcb_ops qlcnic_82xx_dcb_ops = {
.free = __qlcnic_dcb_free,
.attach = __qlcnic_dcb_attach,
.query_hw_capability = __qlcnic_dcb_query_hw_capability,
.get_info = __qlcnic_dcb_get_info,
.get_hw_capability = qlcnic_82xx_dcb_get_hw_capability,
};
void qlcnic_set_dcb_ops(struct qlcnic_adapter *adapter)
{
if (qlcnic_82xx_check(adapter))
adapter->dcb->ops = &qlcnic_82xx_dcb_ops;
else if (qlcnic_83xx_check(adapter))
adapter->dcb->ops = &qlcnic_83xx_dcb_ops;
}
int __qlcnic_register_dcb(struct qlcnic_adapter *adapter)
{
struct qlcnic_dcb *dcb;
dcb = kzalloc(sizeof(struct qlcnic_dcb), GFP_ATOMIC);
if (!dcb)
return -ENOMEM;
adapter->dcb = dcb;
qlcnic_set_dcb_ops(adapter);
return 0;
}
static void __qlcnic_dcb_free(struct qlcnic_adapter *adapter)
{
struct qlcnic_dcb *dcb = adapter->dcb;
if (!dcb)
return;
kfree(dcb->cfg);
dcb->cfg = NULL;
kfree(dcb);
adapter->dcb = NULL;
}
static void __qlcnic_dcb_get_info(struct qlcnic_adapter *adapter)
{
qlcnic_dcb_get_hw_capability(adapter);
}
static int __qlcnic_dcb_attach(struct qlcnic_adapter *adapter)
{
struct qlcnic_dcb *dcb = adapter->dcb;
dcb->cfg = kzalloc(sizeof(struct qlcnic_dcb_cfg), GFP_ATOMIC);
if (!dcb->cfg)
return -ENOMEM;
qlcnic_dcb_get_info(adapter);
return 0;
}
static int __qlcnic_dcb_query_hw_capability(struct qlcnic_adapter *adapter,
char *buf)
{
struct qlcnic_cmd_args cmd;
u32 mbx_out;
int err;
err = qlcnic_alloc_mbx_args(&cmd, adapter, QLCNIC_CMD_DCB_QUERY_CAP);
if (err)
return err;
err = qlcnic_issue_cmd(adapter, &cmd);
if (err) {
dev_err(&adapter->pdev->dev,
"Failed to query DCBX capability, err %d\n", err);
} else {
mbx_out = cmd.rsp.arg[1];
if (buf)
memcpy(buf, &mbx_out, sizeof(u32));
}
qlcnic_free_mbx_args(&cmd);
return err;
}
static int __qlcnic_dcb_get_capability(struct qlcnic_adapter *adapter, u32 *val)
{
struct qlcnic_dcb_capability *cap = &adapter->dcb->cfg->capability;
u32 mbx_out;
int err;
memset(cap, 0, sizeof(struct qlcnic_dcb_capability));
err = qlcnic_dcb_query_hw_capability(adapter, (char *)val);
if (err)
return err;
mbx_out = *val;
if (QLC_DCB_TSA_SUPPORT(mbx_out))
cap->tsa_capability = true;
if (QLC_DCB_ETS_SUPPORT(mbx_out))
cap->ets_capability = true;
cap->max_num_tc = QLC_DCB_MAX_NUM_TC(mbx_out);
cap->max_ets_tc = QLC_DCB_MAX_NUM_ETS_TC(mbx_out);
cap->max_pfc_tc = QLC_DCB_MAX_NUM_PFC_TC(mbx_out);
if (cap->max_num_tc > QLC_DCB_MAX_TC ||
cap->max_ets_tc > cap->max_num_tc ||
cap->max_pfc_tc > cap->max_num_tc) {
dev_err(&adapter->pdev->dev, "Invalid DCB configuration\n");
return -EINVAL;
}
return err;
}
static int qlcnic_82xx_dcb_get_hw_capability(struct qlcnic_adapter *adapter)
{
struct qlcnic_dcb_cfg *cfg = adapter->dcb->cfg;
struct qlcnic_dcb_capability *cap;
u32 mbx_out;
int err;
err = __qlcnic_dcb_get_capability(adapter, &mbx_out);
if (err)
return err;
cap = &cfg->capability;
cap->dcb_capability = DCB_CAP_DCBX_VER_CEE | DCB_CAP_DCBX_LLD_MANAGED;
if (cap->dcb_capability && cap->tsa_capability && cap->ets_capability)
set_bit(__QLCNIC_DCB_STATE, &adapter->state);
return err;
}
static int qlcnic_83xx_dcb_get_hw_capability(struct qlcnic_adapter *adapter)
{
struct qlcnic_dcb_capability *cap = &adapter->dcb->cfg->capability;
u32 mbx_out;
int err;
err = __qlcnic_dcb_get_capability(adapter, &mbx_out);
if (err)
return err;
if (mbx_out & BIT_2)
cap->dcb_capability = DCB_CAP_DCBX_VER_CEE;
if (mbx_out & BIT_3)
cap->dcb_capability |= DCB_CAP_DCBX_VER_IEEE;
if (cap->dcb_capability)
cap->dcb_capability |= DCB_CAP_DCBX_LLD_MANAGED;
if (cap->dcb_capability && cap->tsa_capability && cap->ets_capability)
set_bit(__QLCNIC_DCB_STATE, &adapter->state);
return err;
}
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