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cxgb4: core hardware/firmware support for Forward Error Correction on a link 

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Casey Leedom 2017-07-27 16:47:27 -07:00 committed by David S. Miller
parent 1a5f3da20b
commit 158a5c0a24
1 changed files with 117 additions and 35 deletions
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152
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
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@ -3840,11 +3840,64 @@ void t4_ulprx_read_la(struct adapter *adap, u32 *la_buf)
FW_PORT_CAP_SPEED_40G | FW_PORT_CAP_SPEED_100G | \
FW_PORT_CAP_ANEG)
/* Translate Firmware Port Capabilities Pause specification to Common Code */
static inline unsigned int fwcap_to_cc_pause(unsigned int fw_pause)
{
unsigned int cc_pause = 0;
if (fw_pause & FW_PORT_CAP_FC_RX)
cc_pause |= PAUSE_RX;
if (fw_pause & FW_PORT_CAP_FC_TX)
cc_pause |= PAUSE_TX;
return cc_pause;
}
/* Translate Common Code Pause specification into Firmware Port Capabilities */
static inline unsigned int cc_to_fwcap_pause(unsigned int cc_pause)
{
unsigned int fw_pause = 0;
if (cc_pause & PAUSE_RX)
fw_pause |= FW_PORT_CAP_FC_RX;
if (cc_pause & PAUSE_TX)
fw_pause |= FW_PORT_CAP_FC_TX;
return fw_pause;
}
/* Translate Firmware Forward Error Correction specification to Common Code */
static inline unsigned int fwcap_to_cc_fec(unsigned int fw_fec)
{
unsigned int cc_fec = 0;
if (fw_fec & FW_PORT_CAP_FEC_RS)
cc_fec |= FEC_RS;
if (fw_fec & FW_PORT_CAP_FEC_BASER_RS)
cc_fec |= FEC_BASER_RS;
return cc_fec;
}
/* Translate Common Code Forward Error Correction specification to Firmware */
static inline unsigned int cc_to_fwcap_fec(unsigned int cc_fec)
{
unsigned int fw_fec = 0;
if (cc_fec & FEC_RS)
fw_fec |= FW_PORT_CAP_FEC_RS;
if (cc_fec & FEC_BASER_RS)
fw_fec |= FW_PORT_CAP_FEC_BASER_RS;
return fw_fec;
}
/**
* t4_link_l1cfg - apply link configuration to MAC/PHY
* @phy: the PHY to setup
* @mac: the MAC to setup
* @lc: the requested link configuration
* @adapter: the adapter
* @mbox: the Firmware Mailbox to use
* @port: the Port ID
* @lc: the Port's Link Configuration
*
* Set up a port's MAC and PHY according to a desired link configuration.
* - If the PHY can auto-negotiate first decide what to advertise, then
@ -3857,22 +3910,46 @@ int t4_link_l1cfg(struct adapter *adap, unsigned int mbox, unsigned int port,
struct link_config *lc)
{
struct fw_port_cmd c;
unsigned int mdi = FW_PORT_CAP_MDI_V(FW_PORT_CAP_MDI_AUTO);
unsigned int fc = 0, fec = 0, fw_fec = 0;
unsigned int fw_mdi = FW_PORT_CAP_MDI_V(FW_PORT_CAP_MDI_AUTO);
unsigned int fw_fc, cc_fec, fw_fec;
unsigned int rcap;
lc->link_ok = 0;
if (lc->requested_fc & PAUSE_RX)
fc |= FW_PORT_CAP_FC_RX;
if (lc->requested_fc & PAUSE_TX)
fc |= FW_PORT_CAP_FC_TX;
fec = lc->requested_fec & FEC_AUTO ? lc->auto_fec : lc->requested_fec;
/* Convert driver coding of Pause Frame Flow Control settings into the
* Firmware's API.
*/
fw_fc = cc_to_fwcap_pause(lc->requested_fc);
if (fec & FEC_RS)
fw_fec |= FW_PORT_CAP_FEC_RS;
if (fec & FEC_BASER_RS)
fw_fec |= FW_PORT_CAP_FEC_BASER_RS;
/* Convert Common Code Forward Error Control settings into the
* Firmware's API. If the current Requested FEC has "Automatic"
* (IEEE 802.3) specified, then we use whatever the Firmware
* sent us as part of it's IEEE 802.3-based interpratation of
* the Transceiver Module EPROM FEC parameters. Otherwise we
* use whatever is in the current Requested FEC settings.
*/
if (lc->requested_fec & FEC_AUTO)
cc_fec = lc->auto_fec;
else
cc_fec = lc->requested_fec;
fw_fec = cc_to_fwcap_fec(cc_fec);
/* Figure out what our Requested Port Capabilities are going to be.
*/
if (!(lc->supported & FW_PORT_CAP_ANEG)) {
rcap = (lc->supported & ADVERT_MASK) | fw_fc | fw_fec;
lc->fc = lc->requested_fc & (PAUSE_RX | PAUSE_TX);
lc->fec = cc_fec;
} else if (lc->autoneg == AUTONEG_DISABLE) {
rcap = lc->requested_speed | fw_fc | fw_fec | fw_mdi;
lc->fc = lc->requested_fc & (PAUSE_RX | PAUSE_TX);
lc->fec = cc_fec;
} else {
rcap = lc->advertising | fw_fc | fw_fec | fw_mdi;
}
/* And send that on to the Firmware ...
*/
memset(&c, 0, sizeof(c));
c.op_to_portid = cpu_to_be32(FW_CMD_OP_V(FW_PORT_CMD) |
FW_CMD_REQUEST_F | FW_CMD_EXEC_F |
@ -3880,19 +3957,7 @@ int t4_link_l1cfg(struct adapter *adap, unsigned int mbox, unsigned int port,
c.action_to_len16 =
cpu_to_be32(FW_PORT_CMD_ACTION_V(FW_PORT_ACTION_L1_CFG) |
FW_LEN16(c));
if (!(lc->supported & FW_PORT_CAP_ANEG)) {
c.u.l1cfg.rcap = cpu_to_be32((lc->supported & ADVERT_MASK) |
fc | fw_fec);
lc->fc = lc->requested_fc & (PAUSE_RX | PAUSE_TX);
} else if (lc->autoneg == AUTONEG_DISABLE) {
c.u.l1cfg.rcap = cpu_to_be32(lc->requested_speed | fc |
fw_fec | mdi);
lc->fc = lc->requested_fc & (PAUSE_RX | PAUSE_TX);
} else
c.u.l1cfg.rcap = cpu_to_be32(lc->advertising | fc |
fw_fec | mdi);
c.u.l1cfg.rcap = cpu_to_be32(rcap);
return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}
@ -7630,19 +7695,28 @@ static const char *t4_link_down_rc_str(unsigned char link_down_rc)
void t4_handle_get_port_info(struct port_info *pi, const __be64 *rpl)
{
const struct fw_port_cmd *p = (const void *)rpl;
unsigned int acaps = be16_to_cpu(p->u.info.acap);
struct adapter *adap = pi->adapter;
/* link/module state change message */
int speed = 0, fc = 0;
int speed = 0, fc, fec;
struct link_config *lc;
u32 stat = be32_to_cpu(p->u.info.lstatus_to_modtype);
int link_ok = (stat & FW_PORT_CMD_LSTATUS_F) != 0;
u32 mod = FW_PORT_CMD_MODTYPE_G(stat);
/* Unfortunately the format of the Link Status returned by the
* Firmware isn't the same as the Firmware Port Capabilities bitfield
* used everywhere else ...
*/
fc = 0;
if (stat & FW_PORT_CMD_RXPAUSE_F)
fc |= PAUSE_RX;
if (stat & FW_PORT_CMD_TXPAUSE_F)
fc |= PAUSE_TX;
fec = fwcap_to_cc_fec(acaps);
if (stat & FW_PORT_CMD_LSPEED_V(FW_PORT_CAP_SPEED_100M))
speed = 100;
else if (stat & FW_PORT_CMD_LSPEED_V(FW_PORT_CAP_SPEED_1G))
@ -7659,11 +7733,20 @@ void t4_handle_get_port_info(struct port_info *pi, const __be64 *rpl)
lc = &pi->link_cfg;
if (mod != pi->mod_type) {
/* When a new Transceiver Module is inserted, the Firmware
* will examine any Forward Error Correction parameters
* present in the Transceiver Module i2c EPROM and determine
* the supported and recommended FEC settings from those
* based on IEEE 802.3 standards. We always record the
* IEEE 802.3 recommended "automatic" settings.
*/
lc->auto_fec = fec;
pi->mod_type = mod;
t4_os_portmod_changed(adap, pi->port_id);
}
if (link_ok != lc->link_ok || speed != lc->speed ||
fc != lc->fc) { /* something changed */
fc != lc->fc || fec != lc->fec) { /* something changed */
if (!link_ok && lc->link_ok) {
unsigned char rc = FW_PORT_CMD_LINKDNRC_G(stat);
@ -7675,6 +7758,8 @@ void t4_handle_get_port_info(struct port_info *pi, const __be64 *rpl)
lc->link_ok = link_ok;
lc->speed = speed;
lc->fc = fc;
lc->fec = fec;
lc->supported = be16_to_cpu(p->u.info.pcap);
lc->lp_advertising = be16_to_cpu(p->u.info.lpacap);
@ -7764,7 +7849,8 @@ static void get_pci_mode(struct adapter *adapter, struct pci_params *p)
/**
* init_link_config - initialize a link's SW state
* @lc: structure holding the link state
* @caps: link capabilities
* @pcaps: link Port Capabilities
* @acaps: link current Advertised Port Capabilities
*
* Initializes the SW state maintained for each link, including the link's
* capabilities and default speed/flow-control/autonegotiation settings.
@ -7777,15 +7863,11 @@ static void init_link_config(struct link_config *lc, unsigned int pcaps,
lc->requested_speed = 0;
lc->speed = 0;
lc->requested_fc = lc->fc = PAUSE_RX | PAUSE_TX;
lc->auto_fec = 0;
/* For Forward Error Control, we default to whatever the Firmware
* tells us the Link is currently advertising.
*/
if (acaps & FW_PORT_CAP_FEC_RS)
lc->auto_fec |= FEC_RS;
if (acaps & FW_PORT_CAP_FEC_BASER_RS)
lc->auto_fec |= FEC_BASER_RS;
lc->auto_fec = fwcap_to_cc_fec(acaps);
lc->requested_fec = FEC_AUTO;
lc->fec = lc->auto_fec;