The offload types currently supported in mqprio are 0 (no offload) and 1 (offload only TCs) by setting these values for the 'hw' option. If offloads are supported by setting the 'hw' option to 1, the default offload mode is 'dcb' where only the TC values are offloaded to the device. This patch introduces a new hardware offload mode called 'channel' with 'hw' set to 1 in mqprio which makes full use of the mqprio options, the TCs, the queue configurations and the QoS parameters for the TCs. This is achieved through a new netlink attribute for the 'mode' option which takes values such as 'dcb' (default) and 'channel'. The 'channel' mode also supports QoS attributes for traffic class such as minimum and maximum values for bandwidth rate limits. This patch enables configuring additional HW shaper attributes associated with a traffic class. Currently the shaper for bandwidth rate limiting is supported which takes options such as minimum and maximum bandwidth rates and are offloaded to the hardware in the 'channel' mode. The min and max limits for bandwidth rates are provided by the user along with the TCs and the queue configurations when creating the mqprio qdisc. The interface can be extended to support new HW shapers in future through the 'shaper' attribute. Introduces a new data structure 'tc_mqprio_qopt_offload' for offloading mqprio queue options and use this to be shared between the kernel and device driver. This contains a copy of the existing data structure for mqprio queue options. This new data structure can be extended when adding new attributes for traffic class such as mode, shaper, shaper parameters (bandwidth rate limits). The existing data structure for mqprio queue options will be shared between the kernel and userspace. Example: queues 4@0 4@4 hw 1 mode channel shaper bw_rlimit\ min_rate 1Gbit 2Gbit max_rate 4Gbit 5Gbit To dump the bandwidth rates: qdisc mqprio 804a: root tc 2 map 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 queues:(0:3) (4:7) mode:channel shaper:bw_rlimit min_rate:1Gbit 2Gbit max_rate:4Gbit 5Gbit
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| @@ -625,6 +625,22 @@ enum { · 624 unmodified lines | ||
| 625 | 625 | |
| 626 | 626 | #define TC_MQPRIO_HW_OFFLOAD_MAX (__TC_MQPRIO_HW_OFFLOAD_MAX - 1) |
| 627 | 627 | |
| 628 | +enum { | |
| 629 | + TC_MQPRIO_MODE_DCB, | |
| 630 | + TC_MQPRIO_MODE_CHANNEL, | |
| 631 | + __TC_MQPRIO_MODE_MAX | |
| 632 | +}; | |
| 633 | + | |
| 634 | +#define __TC_MQPRIO_MODE_MAX (__TC_MQPRIO_MODE_MAX - 1) | |
| 635 | + | |
| 636 | +enum { | |
| 637 | + TC_MQPRIO_SHAPER_DCB, | |
| 638 | + TC_MQPRIO_SHAPER_BW_RATE, /* Add new shapers below */ | |
| 639 | + __TC_MQPRIO_SHAPER_MAX | |
| 640 | +}; | |
| 641 | + | |
| 642 | +#define __TC_MQPRIO_SHAPER_MAX (__TC_MQPRIO_SHAPER_MAX - 1) | |
| 643 | + | |
| 628 | 644 | struct tc_mqprio_qopt { |
| 629 | 645 | __u8 num_tc; |
| 630 | 646 | __u8 prio_tc_map[TC_QOPT_BITMASK + 1]; |
| @@ -633,6 +649,22 @@ struct tc_mqprio_qopt { · 2 unmodified lines | ||
| 633 | 649 | __u16 offset[TC_QOPT_MAX_QUEUE]; |
| 634 | 650 | }; |
| 635 | 651 | |
| 652 | +#define TC_MQPRIO_F_MODE 0x1 | |
| 653 | +#define TC_MQPRIO_F_SHAPER 0x2 | |
| 654 | +#define TC_MQPRIO_F_MIN_RATE 0x4 | |
| 655 | +#define TC_MQPRIO_F_MAX_RATE 0x8 | |
| 656 | + | |
| 657 | +enum { | |
| 658 | + TCA_MQPRIO_UNSPEC, | |
| 659 | + TCA_MQPRIO_MODE, | |
| 660 | + TCA_MQPRIO_SHAPER, | |
| 661 | + TCA_MQPRIO_MIN_RATE64, | |
| 662 | + TCA_MQPRIO_MAX_RATE64, | |
| 663 | + __TCA_MQPRIO_MAX, | |
| 664 | +}; | |
| 665 | + | |
| 666 | +#define TCA_MQPRIO_MAX (__TCA_MQPRIO_MAX - 1) | |
| 667 | + | |
| 636 | 668 | /* SFB */ |
| 637 | 669 | |
| 638 | 670 | enum { |