kernel/drivers/net/ethernet/freescale/gianfar.h, branch linux-5.14.y

net: gianfar: Implement rx_missed_errors counter

2021-06-17T18:39:48Z

Devices with RMON support has a 16-bit RDRP counter. It provides: "Receive dropped packets counter. Increments for frames received which are streamed to system but are later dropped due to lack of system resources." To handle more than 2^16 dropped packets, a carry bit in CAR1 register is set on overflow, so we enable irq when this is set, extending the counter to 2^64 for handling situations where lots of packets are missed (e.g. during heavy network storms). Signed-off-by: Esben Haabendal Signed-off-by: David S. Miller

net: gianfar: Add definitions for CAR1 and CAM1 register bits

2021-06-17T18:39:48Z

These are for carry status and interrupt mask bits of statistics registers. Signed-off-by: Esben Haabendal Signed-off-by: David S. Miller

net: gianfar: Extend statistics counters to 64-bit

2021-06-17T18:39:47Z

No reason to wrap counter values at 2^32. Especially the bytes counters can wrap pretty fast on Gbit networks. Signed-off-by: Esben Haabendal Signed-off-by: David S. Miller

gianfar: Drop GFAR_MQ_POLLING support

2021-04-16T22:46:15Z

Gianfar used to enable all 8 Rx queues (DMA rings) per ethernet device, even though the controller can only support 2 interrupt lines at most. This meant that multiple Rx queues would have to be grouped per NAPI poll routine, and the CPU would have to split the budget and service them in a round robin manner. The overhead of this scheme proved to outweight the potential benefits. The alternative was to introduce the "Single Queue" polling mode, supporting one Rx queue per NAPI, which became the default packet processing option and helped improve the performance of the driver. MQ_POLLING also relies on undocumeted device tree properties to specify how to map the 8 Rx and Tx queues to a given interrupt line (aka "interrupt group"). Using module parameters to enable this mode wasn't an option either. Long story short, MQ_POLLING became obsolete, now it is just dead code, and no one asked for it so far. For the Tx queues, multi-queue support (more than 1 Tx queue per CPU) could be revisited by adding tc MQPRIO support, but again, one has to consider that there are only 2 interrupt lines. So the NAPI poll routine would have to service multiple Tx rings. Signed-off-by: Claudiu Manoil Signed-off-by: David S. Miller

net/freescale: Clean drivers from static versions

2020-03-04T01:54:55Z

There is no need to set static versions because linux kernel is released all together with same version applicable to the whole code base. Signed-off-by: Leon Romanovsky Signed-off-by: David S. Miller

gianfar: Maximize Rx buffer size

2019-11-06T18:25:20Z

Until now the size of a Rx buffer was artificially limited to 1536B (which happens to be the default, after reset, hardware value for a Rx buffer). This approach however leaves unused memory space for Rx packets, since the driver uses a paged allocation scheme that reserves half a page for each Rx skb. There's also the inconvenience that frames around 1536 bytes can get scattered if the limit is slightly exceeded. This limit can be exceeded even for standard MTU of 1500B traffic, for common cases like stacked VLANs, or DSA tags. To address these issues, let's just compute the buffer size starting from the upper limit of 2KB (half a page) and subtract the skb overhead and alignment restrictions. Signed-off-by: Claudiu Manoil Signed-off-by: David S. Miller

gianfar: cleanup gianfar.h

2019-09-05T10:28:15Z

Remove now unused macro and structure definitions from gianfar.h that have accumulated there over time. Signed-off-by: Arseny Solokha Signed-off-by: David S. Miller

gianfar: remove forward declarations

2019-09-05T10:28:14Z

Remove forward declarations of various static functions located in two driver implementation files and rearrange the corresponding definitions accordingly. This patch only introduces mechanical changes, namely it removes forward declarations and moves function definitions around; it does not change any functionality. Signed-off-by: Arseny Solokha Signed-off-by: David S. Miller

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

net: ethernet: gianfar_ethtool: get phc index through drvdata

2018-05-29T03:05:11Z

Global variable gfar_phc_index was used to get and store phc index through gianfar_ptp driver. However gianfar_ptp had been renamed as ptp_qoriq for QorIQ common PTP driver. This gfar_phc_index doesn't work any more, and the phc index is stored in drvdata now. This patch is to support getting phc index through ptp_qoriq drvdata. Signed-off-by: Yangbo Lu Signed-off-by: David S. Miller