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net: thunderx: Leave serdes lane config on 81/83xx to firmware

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For DLMs and SLMs on 80/81/83xx, many lane configurations
across different boards are coming up. Also kernel doesn't have
any way to identify board type/info and since firmware does,
just get rid of figuring out lane to serdes config and take
whatever has been programmed by low level firmware.

Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sunil Goutham 2017-01-25 17:36:24 +05:30 committed by David S. Miller
parent fff4ffdde1
commit fff37fdad9
1 changed files with 18 additions and 77 deletions
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95
drivers/net/ethernet/cavium/thunder/thunder_bgx.c
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@ -894,17 +894,15 @@ static void bgx_print_qlm_mode(struct bgx *bgx, u8 lmacid)
struct device *dev = &bgx->pdev->dev;
struct lmac *lmac;
char str[20];
u8 dlm;
if (lmacid > bgx->max_lmac)
if (!bgx->is_dlm && lmacid)
return;
lmac = &bgx->lmac[lmacid];
dlm = (lmacid / 2) + (bgx->bgx_id * 2);
if (!bgx->is_dlm)
sprintf(str, "BGX%d QLM mode", bgx->bgx_id);
else
sprintf(str, "BGX%d DLM%d mode", bgx->bgx_id, dlm);
sprintf(str, "BGX%d LMAC%d mode", bgx->bgx_id, lmacid);
switch (lmac->lmac_type) {
case BGX_MODE_SGMII:
@ -990,7 +988,6 @@ static void lmac_set_training(struct bgx *bgx, struct lmac *lmac, int lmacid)
static void bgx_set_lmac_config(struct bgx *bgx, u8 idx)
{
struct lmac *lmac;
struct lmac *olmac;
u64 cmr_cfg;
u8 lmac_type;
u8 lane_to_sds;
@ -1010,62 +1007,26 @@ static void bgx_set_lmac_config(struct bgx *bgx, u8 idx)
return;
}
/* On 81xx BGX can be split across 2 DLMs
* firmware programs lmac_type of LMAC0 and LMAC2
/* For DLMs or SLMs on 80/81/83xx so many lane configurations
* are possible and vary across boards. Also Kernel doesn't have
* any way to identify board type/info and since firmware does,
* just take lmac type and serdes lane config as is.
*/
if ((idx == 0) || (idx == 2)) {
cmr_cfg = bgx_reg_read(bgx, idx, BGX_CMRX_CFG);
lmac_type = (u8)((cmr_cfg >> 8) & 0x07);
lane_to_sds = (u8)(cmr_cfg & 0xFF);
/* Check if config is not reset value */
if ((lmac_type == 0) && (lane_to_sds == 0xE4))
lmac->lmac_type = BGX_MODE_INVALID;
else
lmac->lmac_type = lmac_type;
lmac_set_training(bgx, lmac, lmac->lmacid);
lmac_set_lane2sds(bgx, lmac);
olmac = &bgx->lmac[idx + 1];
/* Check if other LMAC on the same DLM is already configured by
* firmware, if so use the same config or else set as same, as
* that of LMAC 0/2.
* This check is needed as on 80xx only one lane of each of the
* DLM of BGX0 is used, so have to rely on firmware for
* distingushing 80xx from 81xx.
*/
cmr_cfg = bgx_reg_read(bgx, idx + 1, BGX_CMRX_CFG);
lmac_type = (u8)((cmr_cfg >> 8) & 0x07);
lane_to_sds = (u8)(cmr_cfg & 0xFF);
if ((lmac_type == 0) && (lane_to_sds == 0xE4)) {
olmac->lmac_type = lmac->lmac_type;
lmac_set_lane2sds(bgx, olmac);
} else {
olmac->lmac_type = lmac_type;
olmac->lane_to_sds = lane_to_sds;
}
lmac_set_training(bgx, olmac, olmac->lmacid);
}
}
static bool is_dlm0_in_bgx_mode(struct bgx *bgx)
{
struct lmac *lmac;
if (!bgx->is_dlm)
return true;
lmac = &bgx->lmac[0];
if (lmac->lmac_type == BGX_MODE_INVALID)
return false;
return true;
cmr_cfg = bgx_reg_read(bgx, idx, BGX_CMRX_CFG);
lmac_type = (u8)((cmr_cfg >> 8) & 0x07);
lane_to_sds = (u8)(cmr_cfg & 0xFF);
/* Check if config is reset value */
if ((lmac_type == 0) && (lane_to_sds == 0xE4))
lmac->lmac_type = BGX_MODE_INVALID;
else
lmac->lmac_type = lmac_type;
lmac->lane_to_sds = lane_to_sds;
lmac_set_training(bgx, lmac, lmac->lmacid);
}
static void bgx_get_qlm_mode(struct bgx *bgx)
{
struct lmac *lmac;
struct lmac *lmac01;
struct lmac *lmac23;
u8 idx;
/* Init all LMAC's type to invalid */
@ -1081,29 +1042,9 @@ static void bgx_get_qlm_mode(struct bgx *bgx)
if (bgx->lmac_count > bgx->max_lmac)
bgx->lmac_count = bgx->max_lmac;
for (idx = 0; idx < bgx->max_lmac; idx++)
bgx_set_lmac_config(bgx, idx);
if (!bgx->is_dlm || bgx->is_rgx) {
bgx_print_qlm_mode(bgx, 0);
return;
}
if (bgx->lmac_count) {
bgx_print_qlm_mode(bgx, 0);
bgx_print_qlm_mode(bgx, 2);
}
/* If DLM0 is not in BGX mode then LMAC0/1 have
* to be configured with serdes lanes of DLM1
*/
if (is_dlm0_in_bgx_mode(bgx) || (bgx->lmac_count > 2))
return;
for (idx = 0; idx < bgx->lmac_count; idx++) {
lmac01 = &bgx->lmac[idx];
lmac23 = &bgx->lmac[idx + 2];
lmac01->lmac_type = lmac23->lmac_type;
lmac01->lane_to_sds = lmac23->lane_to_sds;
bgx_set_lmac_config(bgx, idx);
bgx_print_qlm_mode(bgx, idx);
}
}