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Date: Tue, 25 Jan 2022 19:45:29 -0800 From: Florian Fainelli <f.fainelli@...il.com> To: Ansuel Smith <ansuelsmth@...il.com>, Andrew Lunn <andrew@...n.ch>, Vivien Didelot <vivien.didelot@...il.com>, Vladimir Oltean <olteanv@...il.com>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: [RFC PATCH v7 16/16] net: dsa: qca8k: introduce qca8k_bulk_read/write function On 1/22/2022 5:33 PM, Ansuel Smith wrote: > Introduce qca8k_bulk_read/write() function to use mgmt Ethernet way to > read/write packet in bulk. Make use of this new function in the fdb > function. > > Signed-off-by: Ansuel Smith <ansuelsmth@...il.com> > --- [snip] > static int > qca8k_regmap_read(void *ctx, uint32_t reg, uint32_t *val) > { > @@ -535,17 +572,13 @@ qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask) > static int > qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb) > { > - u32 reg[4], val; > - int i, ret; > + u32 reg[4]; > + int ret; > > /* load the ARL table into an array */ > - for (i = 0; i < 4; i++) { > - ret = qca8k_read(priv, QCA8K_REG_ATU_DATA0 + (i * 4), &val); > - if (ret < 0) > - return ret; > - > - reg[i] = val; > - } > + ret = qca8k_bulk_read(priv, QCA8K_REG_ATU_DATA0, reg, 12); sizeof(reg)? How did you come up with 12 if we were executing the loop 4 times before or were we reading too much? > + if (ret) > + return ret; > > /* vid - 83:72 */ > fdb->vid = FIELD_GET(QCA8K_ATU_VID_MASK, reg[2]); > @@ -569,7 +602,6 @@ qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask, const u8 *mac, > u8 aging) > { > u32 reg[3] = { 0 }; > - int i; > > /* vid - 83:72 */ > reg[2] = FIELD_PREP(QCA8K_ATU_VID_MASK, vid); > @@ -586,8 +618,7 @@ qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask, const u8 *mac, > reg[0] |= FIELD_PREP(QCA8K_ATU_ADDR5_MASK, mac[5]); > > /* load the array into the ARL table */ > - for (i = 0; i < 3; i++) > - qca8k_write(priv, QCA8K_REG_ATU_DATA0 + (i * 4), reg[i]); > + qca8k_bulk_write(priv, QCA8K_REG_ATU_DATA0, reg, 12); sizeof(reg) would be more adequate here. -- Florian
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