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Subject[Patch v3 net-next 1/7] octeontx2-af: forward error correction configuration
Date
From: Christina Jacob <cjacob@marvell.com>

CGX block supports forward error correction modes baseR
and RS. This patch adds support to set encoding mode
and to read corrected/uncorrected block counters

Adds new mailbox handlers set_fec to configure encoding modes
and fec_stats to read counters and also increase mbox timeout
to accomdate firmware command response timeout.

Along with new CGX_CMD_SET_FEC command add other commands to
sync with kernel enum list with firmware.

Signed-off-by: Christina Jacob <cjacob@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
---
drivers/net/ethernet/marvell/octeontx2/af/cgx.c | 76 ++++++++++++++++++++++
drivers/net/ethernet/marvell/octeontx2/af/cgx.h | 7 ++
.../net/ethernet/marvell/octeontx2/af/cgx_fw_if.h | 17 ++++-
drivers/net/ethernet/marvell/octeontx2/af/mbox.h | 22 ++++++-
.../net/ethernet/marvell/octeontx2/af/rvu_cgx.c | 31 +++++++++
5 files changed, 151 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
index 84a9123..fe5512d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
@@ -340,6 +340,60 @@ int cgx_get_tx_stats(void *cgxd, int lmac_id, int idx, u64 *tx_stat)
return 0;
}

+static int cgx_set_fec_stats_count(struct cgx_link_user_info *linfo)
+{
+ if (!linfo->fec)
+ return 0;
+
+ switch (linfo->lmac_type_id) {
+ case LMAC_MODE_SGMII:
+ case LMAC_MODE_XAUI:
+ case LMAC_MODE_RXAUI:
+ case LMAC_MODE_QSGMII:
+ return 0;
+ case LMAC_MODE_10G_R:
+ case LMAC_MODE_25G_R:
+ case LMAC_MODE_100G_R:
+ case LMAC_MODE_USXGMII:
+ return 1;
+ case LMAC_MODE_40G_R:
+ return 4;
+ case LMAC_MODE_50G_R:
+ if (linfo->fec == OTX2_FEC_BASER)
+ return 2;
+ else
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+int cgx_get_fec_stats(void *cgxd, int lmac_id, struct cgx_fec_stats_rsp *rsp)
+{
+ int stats, fec_stats_count = 0;
+ int corr_reg, uncorr_reg;
+ struct cgx *cgx = cgxd;
+
+ if (!cgx || lmac_id >= cgx->lmac_count)
+ return -ENODEV;
+ fec_stats_count =
+ cgx_set_fec_stats_count(&cgx->lmac_idmap[lmac_id]->link_info);
+ if (cgx->lmac_idmap[lmac_id]->link_info.fec == OTX2_FEC_BASER) {
+ corr_reg = CGXX_SPUX_LNX_FEC_CORR_BLOCKS;
+ uncorr_reg = CGXX_SPUX_LNX_FEC_UNCORR_BLOCKS;
+ } else {
+ corr_reg = CGXX_SPUX_RSFEC_CORR;
+ uncorr_reg = CGXX_SPUX_RSFEC_UNCORR;
+ }
+ for (stats = 0; stats < fec_stats_count; stats++) {
+ rsp->fec_corr_blks +=
+ cgx_read(cgx, lmac_id, corr_reg + (stats * 8));
+ rsp->fec_uncorr_blks +=
+ cgx_read(cgx, lmac_id, uncorr_reg + (stats * 8));
+ }
+ return 0;
+}
+
int cgx_lmac_rx_tx_enable(void *cgxd, int lmac_id, bool enable)
{
struct cgx *cgx = cgxd;
@@ -615,6 +669,7 @@ static inline void link_status_user_format(u64 lstat,
linfo->link_up = FIELD_GET(RESP_LINKSTAT_UP, lstat);
linfo->full_duplex = FIELD_GET(RESP_LINKSTAT_FDUPLEX, lstat);
linfo->speed = cgx_speed_mbps[FIELD_GET(RESP_LINKSTAT_SPEED, lstat)];
+ linfo->fec = FIELD_GET(RESP_LINKSTAT_FEC, lstat);
linfo->lmac_type_id = cgx_get_lmac_type(cgx, lmac_id);
lmac_string = cgx_lmactype_string[linfo->lmac_type_id];
strncpy(linfo->lmac_type, lmac_string, LMACTYPE_STR_LEN - 1);
@@ -785,6 +840,27 @@ int cgx_get_fwdata_base(u64 *base)
return err;
}

+int cgx_set_fec(u64 fec, int cgx_id, int lmac_id)
+{
+ u64 req = 0, resp;
+ struct cgx *cgx;
+ int err = 0;
+
+ cgx = cgx_get_pdata(cgx_id);
+ if (!cgx)
+ return -ENXIO;
+
+ req = FIELD_SET(CMDREG_ID, CGX_CMD_SET_FEC, req);
+ req = FIELD_SET(CMDSETFEC, fec, req);
+ err = cgx_fwi_cmd_generic(req, &resp, cgx, lmac_id);
+ if (err)
+ return err;
+
+ cgx->lmac_idmap[lmac_id]->link_info.fec =
+ FIELD_GET(RESP_LINKSTAT_FEC, resp);
+ return cgx->lmac_idmap[lmac_id]->link_info.fec;
+}
+
static int cgx_fwi_link_change(struct cgx *cgx, int lmac_id, bool enable)
{
u64 req = 0;
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/cgx.h b/drivers/net/ethernet/marvell/octeontx2/af/cgx.h
index bcfc3e5..1824e95 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/cgx.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/cgx.h
@@ -56,6 +56,11 @@
#define CGXX_SCRATCH1_REG 0x1058
#define CGX_CONST 0x2000
#define CGXX_SPUX_CONTROL1 0x10000
+#define CGXX_SPUX_LNX_FEC_CORR_BLOCKS 0x10700
+#define CGXX_SPUX_LNX_FEC_UNCORR_BLOCKS 0x10800
+#define CGXX_SPUX_RSFEC_CORR 0x10088
+#define CGXX_SPUX_RSFEC_UNCORR 0x10090
+
#define CGXX_SPUX_CONTROL1_LBK BIT_ULL(14)
#define CGXX_GMP_PCS_MRX_CTL 0x30000
#define CGXX_GMP_PCS_MRX_CTL_LBK BIT_ULL(14)
@@ -147,5 +152,7 @@ int cgx_lmac_set_pause_frm(void *cgxd, int lmac_id,
u8 tx_pause, u8 rx_pause);
void cgx_lmac_ptp_config(void *cgxd, int lmac_id, bool enable);
u8 cgx_lmac_get_p2x(int cgx_id, int lmac_id);
+int cgx_set_fec(u64 fec, int cgx_id, int lmac_id);
+int cgx_get_fec_stats(void *cgxd, int lmac_id, struct cgx_fec_stats_rsp *rsp);

#endif /* CGX_H */
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/cgx_fw_if.h b/drivers/net/ethernet/marvell/octeontx2/af/cgx_fw_if.h
index c3702fa..3485596 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/cgx_fw_if.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/cgx_fw_if.h
@@ -81,6 +81,14 @@ enum cgx_cmd_id {
CGX_CMD_GET_MKEX_PRFL_SIZE,
CGX_CMD_GET_MKEX_PRFL_ADDR,
CGX_CMD_GET_FWD_BASE, /* get base address of shared FW data */
+ CGX_CMD_GET_LINK_MODES, /* Supported Link Modes */
+ CGX_CMD_SET_LINK_MODE,
+ CGX_CMD_GET_SUPPORTED_FEC,
+ CGX_CMD_SET_FEC,
+ CGX_CMD_GET_AN,
+ CGX_CMD_SET_AN,
+ CGX_CMD_GET_ADV_LINK_MODES,
+ CGX_CMD_GET_ADV_FEC,
};

/* async event ids */
@@ -171,13 +179,19 @@ struct cgx_lnk_sts {
uint64_t full_duplex:1;
uint64_t speed:4; /* cgx_link_speed */
uint64_t err_type:10;
- uint64_t reserved2:39;
+ uint64_t an:1; /* AN supported or not */
+ uint64_t fec:2; /* FEC type if enabled, if not 0 */
+ uint64_t port:8;
+ uint64_t reserved2:28;
};

#define RESP_LINKSTAT_UP GENMASK_ULL(9, 9)
#define RESP_LINKSTAT_FDUPLEX GENMASK_ULL(10, 10)
#define RESP_LINKSTAT_SPEED GENMASK_ULL(14, 11)
#define RESP_LINKSTAT_ERRTYPE GENMASK_ULL(24, 15)
+#define RESP_LINKSTAT_AN GENMASK_ULL(25, 25)
+#define RESP_LINKSTAT_FEC GENMASK_ULL(27, 26)
+#define RESP_LINKSTAT_PORT GENMASK_ULL(35, 28)

/* scratchx(1) CSR used for non-secure SW->ATF communication
* This CSR acts as a command register
@@ -199,4 +213,5 @@ struct cgx_lnk_sts {
#define CMDLINKCHANGE_FULLDPLX BIT_ULL(9)
#define CMDLINKCHANGE_SPEED GENMASK_ULL(13, 10)

+#define CMDSETFEC GENMASK_ULL(9, 8)
#endif /* __CGX_FW_INTF_H__ */
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
index 89e93eb..a59a355 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
@@ -36,7 +36,7 @@

#define INTR_MASK(pfvfs) ((pfvfs < 64) ? (BIT_ULL(pfvfs) - 1) : (~0ull))

-#define MBOX_RSP_TIMEOUT 2000 /* Time(ms) to wait for mbox response */
+#define MBOX_RSP_TIMEOUT 3000 /* Time(ms) to wait for mbox response */

#define MBOX_MSG_ALIGN 16 /* Align mbox msg start to 16bytes */

@@ -149,6 +149,9 @@ M(CGX_PTP_RX_ENABLE, 0x20C, cgx_ptp_rx_enable, msg_req, msg_rsp) \
M(CGX_PTP_RX_DISABLE, 0x20D, cgx_ptp_rx_disable, msg_req, msg_rsp) \
M(CGX_CFG_PAUSE_FRM, 0x20E, cgx_cfg_pause_frm, cgx_pause_frm_cfg, \
cgx_pause_frm_cfg) \
+M(CGX_FEC_SET, 0x210, cgx_set_fec_param, fec_mode, fec_mode) \
+M(CGX_FEC_STATS, 0x211, cgx_fec_stats, msg_req, cgx_fec_stats_rsp) \
+ /* NPA mbox IDs (range 0x400 - 0x5FF) */ \
/* NPA mbox IDs (range 0x400 - 0x5FF) */ \
M(NPA_LF_ALLOC, 0x400, npa_lf_alloc, \
npa_lf_alloc_req, npa_lf_alloc_rsp) \
@@ -360,6 +363,11 @@ struct cgx_stats_rsp {
u64 tx_stats[CGX_TX_STATS_COUNT];
};

+struct cgx_fec_stats_rsp {
+ struct mbox_msghdr hdr;
+ u64 fec_corr_blks;
+ u64 fec_uncorr_blks;
+};
/* Structure for requesting the operation for
* setting/getting mac address in the CGX interface
*/
@@ -373,6 +381,7 @@ struct cgx_link_user_info {
uint64_t full_duplex:1;
uint64_t lmac_type_id:4;
uint64_t speed:20; /* speed in Mbps */
+ uint64_t fec:2; /* FEC type if enabled else 0 */
#define LMACTYPE_STR_LEN 16
char lmac_type[LMACTYPE_STR_LEN];
};
@@ -391,6 +400,17 @@ struct cgx_pause_frm_cfg {
u8 tx_pause;
};

+enum fec_type {
+ OTX2_FEC_NONE,
+ OTX2_FEC_BASER,
+ OTX2_FEC_RS,
+};
+
+struct fec_mode {
+ struct mbox_msghdr hdr;
+ int fec;
+};
+
/* NPA mbox message formats */

/* NPA mailbox error codes
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c
index 6c6b411..0d806c5 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c
@@ -462,6 +462,22 @@ int rvu_mbox_handler_cgx_stats(struct rvu *rvu, struct msg_req *req,
return 0;
}

+int rvu_mbox_handler_cgx_fec_stats(struct rvu *rvu,
+ struct msg_req *req,
+ struct cgx_fec_stats_rsp *rsp)
+{
+ int pf = rvu_get_pf(req->hdr.pcifunc);
+ u8 cgx_idx, lmac;
+ void *cgxd;
+
+ if (!is_cgx_config_permitted(rvu, req->hdr.pcifunc))
+ return -EPERM;
+ rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_idx, &lmac);
+
+ cgxd = rvu_cgx_pdata(cgx_idx, rvu);
+ return cgx_get_fec_stats(cgxd, lmac, rsp);
+}
+
int rvu_mbox_handler_cgx_mac_addr_set(struct rvu *rvu,
struct cgx_mac_addr_set_or_get *req,
struct cgx_mac_addr_set_or_get *rsp)
@@ -767,3 +783,18 @@ int rvu_cgx_start_stop_io(struct rvu *rvu, u16 pcifunc, bool start)
mutex_unlock(&rvu->cgx_cfg_lock);
return err;
}
+
+int rvu_mbox_handler_cgx_set_fec_param(struct rvu *rvu,
+ struct fec_mode *req,
+ struct fec_mode *rsp)
+{
+ int pf = rvu_get_pf(req->hdr.pcifunc);
+ u8 cgx_id, lmac_id;
+
+ if (!is_pf_cgxmapped(rvu, pf))
+ return -EPERM;
+
+ rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
+ rsp->fec = cgx_set_fec(req->fec, cgx_id, lmac_id);
+ return 0;
+}
--
2.7.4
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