| 1 | |
| 2 |
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| 3 | #include <linux/netdevice.h>
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| 4 | #include <net/netdev_queues.h>
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| 5 | #include <net/netdev_rx_queue.h>
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| 6 |
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| 7 | #include "dev.h"
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| 8 |
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| 9 | static int netdev_nop_validate_qcfg(struct net_device *dev,
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| 10 | struct netdev_queue_config *qcfg,
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| 11 | struct netlink_ext_ack *extack)
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| 12 | {
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| 13 | return 0;
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| 14 | }
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| 15 |
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| 16 | static int __netdev_queue_config(struct net_device *dev, int rxq_idx,
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| 17 | struct netdev_queue_config *qcfg,
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| 18 | struct netlink_ext_ack *extack,
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| 19 | bool validate)
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| 20 | {
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| 21 | int (*validate_cb)(struct net_device *dev,
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| 22 | struct netdev_queue_config *qcfg,
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| 23 | struct netlink_ext_ack *extack);
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| 24 | struct pp_memory_provider_params *mpp;
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| 25 | int err;
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| 26 |
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| 27 | validate_cb = netdev_nop_validate_qcfg;
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| 28 | if (validate && dev->queue_mgmt_ops->ndo_validate_qcfg)
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| 29 | validate_cb = dev->queue_mgmt_ops->ndo_validate_qcfg;
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| 30 |
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| 31 | memset(qcfg, 0, sizeof(*qcfg));
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| 32 |
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| 33 |
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| 34 | if (dev->queue_mgmt_ops->ndo_default_qcfg)
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| 35 | dev->queue_mgmt_ops->ndo_default_qcfg(dev, qcfg);
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| 36 | err = validate_cb(dev, qcfg, extack);
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| 37 | if (err)
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| 38 | return err;
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| 39 |
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| 40 |
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| 41 | mpp = &__netif_get_rx_queue(dev, rxq_idx)->mp_params;
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| 42 | if (mpp->rx_page_size)
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| 43 | qcfg->rx_page_size = mpp->rx_page_size;
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| 44 | err = validate_cb(dev, qcfg, extack);
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| 45 | if (err)
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| 46 | return err;
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| 47 |
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| 48 | return 0;
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| 49 | }
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| 50 |
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| 51 | |
| 52 | * netdev_queue_config() - get configuration for a given queue
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| 53 | * @dev: net_device instance
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| 54 | * @rxq_idx: index of the queue of interest
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| 55 | * @qcfg: queue configuration struct (output)
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| 56 | *
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| 57 | * Render the configuration for a given queue. This helper should be used
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| 58 | * by drivers which support queue configuration to retrieve config for
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| 59 | * a particular queue.
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| 60 | *
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| 61 | * @qcfg is an output parameter and is always fully initialized by this
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| 62 | * function. Some values may not be set by the user, drivers may either
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| 63 | * deal with the "unset" values in @qcfg, or provide the callback
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| 64 | * to populate defaults in queue_management_ops.
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| 65 |
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| 66 | void netdev_queue_config(struct net_device *dev, int rxq_idx,
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| 67 | struct netdev_queue_config *qcfg)
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| 68 | {
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| 69 | __netdev_queue_config(dev, rxq_idx, qcfg, NULL, false);
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| 70 | }
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| 71 | EXPORT_SYMBOL(netdev_queue_config);
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| 72 |
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| 73 | int netdev_queue_config_validate(struct net_device *dev, int rxq_idx,
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| 74 | struct netdev_queue_config *qcfg,
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| 75 | struct netlink_ext_ack *extack)
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| 76 | {
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| 77 | return __netdev_queue_config(dev, rxq_idx, qcfg, extack, true);
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| 78 | }
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