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net: macb: Add capability-based QBV detection and Versal support

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The 'exclude_qbv' bit in the designcfg_debug1 register varies across
MACB/GEM IP revisions, making direct probing unreliable for detecting
QBV support. This patch introduces a capability-based approach for
consistent QBV feature identification across the IP family.

Platform support updates:
- Establish foundation for QBV detection in TAPRIO implementation
- Enable MACB_CAPS_QBV for Xilinx Versal platform configuration
- Fix capability line wrapping, ensuring code stays within 80 columns

Signed-off-by: Vineeth Karumanchi <vineeth.karumanchi@amd.com>
Link: https://patch.msgid.link/20250814071058.3062453-3-vineeth.karumanchi@amd.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Vineeth Karumanchi 2025-08-14 12:40:58 +05:30 committed by Paolo Abeni
parent 89934dbf16
commit d739ce4beb
2 changed files with 8 additions and 2 deletions
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1
drivers/net/ethernet/cadence/macb.h
View File

@ -770,6 +770,7 @@
#define MACB_CAPS_MIIONRGMII 0x00000200
#define MACB_CAPS_NEED_TSUCLK 0x00000400
#define MACB_CAPS_QUEUE_DISABLE 0x00000800
#define MACB_CAPS_QBV 0x00001000
#define MACB_CAPS_PCS 0x01000000
#define MACB_CAPS_HIGH_SPEED 0x02000000
#define MACB_CAPS_CLK_HW_CHG 0x04000000

9
drivers/net/ethernet/cadence/macb_main.c
View File

@ -4602,6 +4602,10 @@ static int macb_init(struct platform_device *pdev)
dev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
if (bp->caps & MACB_CAPS_SG_DISABLED)
dev->hw_features &= ~NETIF_F_SG;
/* Enable HW_TC if hardware supports QBV */
if (bp->caps & MACB_CAPS_QBV)
dev->hw_features |= NETIF_F_HW_TC;
dev->features = dev->hw_features;
/* Check RX Flow Filters support.
@ -5354,8 +5358,9 @@ static const struct macb_config sama7g5_emac_config = {
static const struct macb_config versal_config = {
.caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO |
MACB_CAPS_GEM_HAS_PTP | MACB_CAPS_BD_RD_PREFETCH | MACB_CAPS_NEED_TSUCLK |
MACB_CAPS_QUEUE_DISABLE,
MACB_CAPS_GEM_HAS_PTP | MACB_CAPS_BD_RD_PREFETCH |
MACB_CAPS_NEED_TSUCLK | MACB_CAPS_QUEUE_DISABLE |
MACB_CAPS_QBV,
.dma_burst_length = 16,
.clk_init = macb_clk_init,
.init = init_reset_optional,