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realtek: pcs: keep track of number of links per SerDes

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Add a field to the rtpcs_serdes structure to keep track of how many
links (aka ports) are used on a single SerDes. This is needed to be
known to map kernel interface modes to SerDes hardware modes properly
(e.g. USXGMII --> USXGMII/10G-QXGMII/XSGMII).

While working in rtpcs_create, optimize referencing the SerDes instance
for cleaner code.

Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/21365
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Jonas Jelonek 2025-12-24 10:28:36 +00:00 committed by Hauke Mehrtens
parent dfd6a4212f
commit 76f392194b
1 changed files with 11 additions and 3 deletions
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14
target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c
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@ -12,6 +12,7 @@
#define RTPCS_SDS_CNT 14
#define RTPCS_PORT_CNT 57
#define RTPCS_MAX_LINKS_PER_SDS 8
#define RTPCS_SPEED_10 0
#define RTPCS_SPEED_100 1
@ -134,8 +135,9 @@ struct rtpcs_ctrl;
struct rtpcs_serdes {
struct rtpcs_ctrl *ctrl;
u8 id;
enum rtpcs_sds_mode hw_mode;
u8 id;
u8 num_of_links;
bool rx_pol_inv;
bool tx_pol_inv;
@ -3090,6 +3092,7 @@ struct phylink_pcs *rtpcs_create(struct device *dev, struct device_node *np, int
{
struct platform_device *pdev;
struct device_node *pcs_np;
struct rtpcs_serdes *sds;
struct rtpcs_ctrl *ctrl;
struct rtpcs_link *link;
u32 sds_id;
@ -3124,8 +3127,12 @@ struct phylink_pcs *rtpcs_create(struct device *dev, struct device_node *np, int
return ERR_PTR(-EINVAL);
if (sds_id >= ctrl->cfg->serdes_count)
return ERR_PTR(-EINVAL);
if (rtpcs_sds_read(&ctrl->serdes[sds_id], 0, 0) < 0)
sds = &ctrl->serdes[sds_id];
if (rtpcs_sds_read(sds, 0, 0) < 0)
return ERR_PTR(-EINVAL);
if (sds->num_of_links >= RTPCS_MAX_LINKS_PER_SDS)
return ERR_PTR(-ERANGE);
link = kzalloc(sizeof(*link), GFP_KERNEL);
if (!link) {
@ -3135,9 +3142,10 @@ struct phylink_pcs *rtpcs_create(struct device *dev, struct device_node *np, int
device_link_add(dev, ctrl->dev, DL_FLAG_AUTOREMOVE_CONSUMER);
sds->num_of_links++;
link->ctrl = ctrl;
link->port = port;
link->sds = &ctrl->serdes[sds_id];
link->sds = sds;
link->pcs.ops = ctrl->cfg->pcs_ops;
link->pcs.neg_mode = true;