[PATCH RFC net-next v2 09/17] net: stmmac: Introduce mac_device_info::priv pointer

Serge Semin
2024-06-24T13:28:32Z

There is going to be introduced an PCS-specific CSR space pointer defined
in the stmmac_priv structure nearby the mmcaddr, estaddr and ptpaddr
fields. In order to have that pointer accessible from the PCS-specific
callback, let's introduce pointer to stmmac_priv defined in the
mac_device_info structure.

Signed-off-by: Serge Semin <fancer.lancer@gmail.com>

---

Note the better approach would be to convert the mac_device_info instance
to being embedded into the stmmac_priv structure. It would have solved
many driver problems like non-unified HW abstraction interface, duplicated
fields (ioaddr and pcsr, etc) or too many non-runtime parameters passed to
the callbacks, etc. But the change also would have been much-much more
invasive than this one is. If despite of that you find the mac_device_info
embedding into stmmac_priv more appropriate (as I do), then I'll provide
the respective patch in place of this one.
---
drivers/net/ethernet/stmicro/stmmac/common.h | 1 +
drivers/net/ethernet/stmicro/stmmac/hwif.c | 1 +
2 files changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index a66b836996d6..f7661268518f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -580,6 +580,7 @@ struct mii_regs {
};

struct mac_device_info {
+ struct stmmac_priv *priv;
const struct stmmac_ops *mac;
const struct stmmac_desc_ops *desc;
const struct stmmac_dma_ops *dma;
diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.c b/drivers/net/ethernet/stmicro/stmmac/hwif.c
index 29367105df54..84fd57b76fad 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.c
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.c
@@ -351,6 +351,7 @@ int stmmac_hwif_init(struct stmmac_priv *priv)
mac->tc = mac->tc ? : entry->tc;
mac->mmc = mac->mmc ? : entry->mmc;
mac->est = mac->est ? : entry->est;
+ mac->priv = priv;

priv->hw = mac;
priv->ptpaddr = priv->ioaddr + entry->regs.ptp_off;
--
2.43.0