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realtek: Improve TX CPU-Tag usage

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On RTL83xx enable learning of the MAC source address of the CPU port
from outgoing packets. Add documentation on bit fields. On RTL93xx
enable port-mask usage and the use of internal priority, these
SoCs automatically learn the MAC.

Signed-off-by: Birger Koblitz <git@birger-koblitz.de>
This commit is contained in:
Birger Koblitz 2021-09-05 20:03:59 +02:00 committed by John Crispin
parent ca04e2dfd0
commit 9eab76c84e
1 changed files with 29 additions and 20 deletions
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49
target/linux/realtek/files-5.10/drivers/net/ethernet/rtl838x_eth.c
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@ -89,14 +89,14 @@ struct notify_b {
u32 reserved2[8]; u32 reserved2[8];
}; };
void rtl838x_create_tx_header(struct p_hdr *h, int dest_port, int prio) static void rtl838x_create_tx_header(struct p_hdr *h, int dest_port, int prio)
{ {
prio &= 0x7; prio &= 0x7;
if (dest_port > 0) { if (dest_port > 0) {
// cpu_tag[0] is reserved on the RTL83XX SoCs // cpu_tag[0] is reserved on the RTL83XX SoCs
h->cpu_tag[1] = 0x0400; h->cpu_tag[1] = 0x0401; // BIT 10: RTL8380_CPU_TAG, BIT0: L2LEARNING on
h->cpu_tag[2] = 0x0200; h->cpu_tag[2] = 0x0200; // Set only AS_DPM, to enable DPM settings below
h->cpu_tag[3] = 0x0000; h->cpu_tag[3] = 0x0000;
h->cpu_tag[4] = BIT(dest_port) >> 16; h->cpu_tag[4] = BIT(dest_port) >> 16;
h->cpu_tag[5] = BIT(dest_port) & 0xffff; h->cpu_tag[5] = BIT(dest_port) & 0xffff;
@ -106,14 +106,15 @@ void rtl838x_create_tx_header(struct p_hdr *h, int dest_port, int prio)
} }
} }
void rtl839x_create_tx_header(struct p_hdr *h, int dest_port, int prio) static void rtl839x_create_tx_header(struct p_hdr *h, int dest_port, int prio)
{ {
prio &= 0x7; prio &= 0x7;
if (dest_port > 0) { if (dest_port > 0) {
// cpu_tag[0] is reserved on the RTL83XX SoCs // cpu_tag[0] is reserved on the RTL83XX SoCs
h->cpu_tag[1] = 0x0100; h->cpu_tag[1] = 0x0100; // RTL8390_CPU_TAG marker
h->cpu_tag[2] = h->cpu_tag[3] = h->cpu_tag[4] = h->cpu_tag[5] = 0; h->cpu_tag[2] = h->cpu_tag[3] = h->cpu_tag[4] = h->cpu_tag[5] = 0;
// h->cpu_tag[1] |= BIT(1) | BIT(0); // Bypass filter 1/2
if (dest_port >= 32) { if (dest_port >= 32) {
dest_port -= 32; dest_port -= 32;
h->cpu_tag[2] = BIT(dest_port) >> 16; h->cpu_tag[2] = BIT(dest_port) >> 16;
@ -122,35 +123,43 @@ void rtl839x_create_tx_header(struct p_hdr *h, int dest_port, int prio)
h->cpu_tag[4] = BIT(dest_port) >> 16; h->cpu_tag[4] = BIT(dest_port) >> 16;
h->cpu_tag[5] = BIT(dest_port) & 0xffff; h->cpu_tag[5] = BIT(dest_port) & 0xffff;
} }
h->cpu_tag[6] |= BIT(21); // Enable destination port mask use h->cpu_tag[2] |= BIT(20); // Enable destination port mask use
h->cpu_tag[2] |= BIT(23); // Enable L2 Learning
// Set internal priority and AS_PRIO // Set internal priority and AS_PRIO
if (prio >= 0) if (prio >= 0)
h->cpu_tag[1] |= prio | BIT(3); h->cpu_tag[1] |= prio | BIT(3);
} }
} }
void rtl930x_create_tx_header(struct p_hdr *h, int dest_port, int prio) static void rtl930x_create_tx_header(struct p_hdr *h, int dest_port, int prio)
{ {
h->cpu_tag[0] = 0x8000; h->cpu_tag[0] = 0x8000; // CPU tag marker
h->cpu_tag[1] = 0; // TODO: Fill port and prio h->cpu_tag[1] = h->cpu_tag[2] = 0;
h->cpu_tag[2] = 0; if (prio >= 0)
h->cpu_tag[2] = BIT(13) | prio << 8; // Enable and set Priority Queue
h->cpu_tag[3] = 0; h->cpu_tag[3] = 0;
h->cpu_tag[4] = 0; h->cpu_tag[4] = 0;
h->cpu_tag[5] = 0; h->cpu_tag[5] = 0;
h->cpu_tag[6] = 0; h->cpu_tag[6] = BIT(dest_port) >> 16;
h->cpu_tag[7] = 0xffff; h->cpu_tag[7] = BIT(dest_port) & 0xffff;
} }
void rtl931x_create_tx_header(struct p_hdr *h, int dest_port, int prio) static void rtl931x_create_tx_header(struct p_hdr *h, int dest_port, int prio)
{ {
h->cpu_tag[0] = 0x8000; h->cpu_tag[0] = 0x8000; // CPU tag marker
h->cpu_tag[1] = 0; // TODO: Fill port and prio h->cpu_tag[1] = h->cpu_tag[2] = 0;
h->cpu_tag[2] = 0; if (prio >= 0)
h->cpu_tag[2] = BIT(13) | prio << 8; // Enable and set Priority Queue
h->cpu_tag[3] = 0; h->cpu_tag[3] = 0;
h->cpu_tag[4] = 0; h->cpu_tag[4] = h->cpu_tag[5] = h->cpu_tag[6] = h->cpu_tag[7] = 0;
h->cpu_tag[5] = 0; if (dest_port >= 32) {
h->cpu_tag[6] = 0; dest_port -= 32;
h->cpu_tag[7] = 0xffff; h->cpu_tag[4] = BIT(dest_port) >> 16;
h->cpu_tag[5] = BIT(dest_port) & 0xffff;
} else {
h->cpu_tag[6] = BIT(dest_port) >> 16;
h->cpu_tag[7] = BIT(dest_port) & 0xffff;
}
} }
struct rtl838x_rx_q { struct rtl838x_rx_q {