Currently the values of WQs for RX and TX queues for MANA devices are hardcoded to default sizes. Allow configuring these values for MANA devices as ringparam configuration(get/set) through ethtool_ops. Signed-off-by: Shradha Gupta <shradhagupta@xxxxxxxxxxxxxxxxxxx> Reviewed-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> Reviewed-by: Long Li <longli@xxxxxxxxxxxxx> --- drivers/net/ethernet/microsoft/mana/mana_en.c | 20 +++-- .../ethernet/microsoft/mana/mana_ethtool.c | 79 +++++++++++++++++++ include/net/mana/mana.h | 21 ++++- 3 files changed, 109 insertions(+), 11 deletions(-) diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c index 91f10910ea44..31355a95e891 100644 --- a/drivers/net/ethernet/microsoft/mana/mana_en.c +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c @@ -618,7 +618,7 @@ static int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu) dev = mpc->ac->gdma_dev->gdma_context->dev; - num_rxb = mpc->num_queues * RX_BUFFERS_PER_QUEUE; + num_rxb = mpc->num_queues * mpc->rx_queue_size; WARN(mpc->rxbufs_pre, "mana rxbufs_pre exists\n"); mpc->rxbufs_pre = kmalloc_array(num_rxb, sizeof(void *), GFP_KERNEL); @@ -1899,14 +1899,15 @@ static int mana_create_txq(struct mana_port_context *apc, return -ENOMEM; /* The minimum size of the WQE is 32 bytes, hence - * MAX_SEND_BUFFERS_PER_QUEUE represents the maximum number of WQEs + * apc->tx_queue_size represents the maximum number of WQEs * the SQ can store. This value is then used to size other queues * to prevent overflow. + * Also note that the txq_size is always going to be MANA_PAGE_ALIGNED, + * as tx_queue_size is always a power of 2. */ - txq_size = MAX_SEND_BUFFERS_PER_QUEUE * 32; - BUILD_BUG_ON(!MANA_PAGE_ALIGNED(txq_size)); + txq_size = apc->tx_queue_size * 32; - cq_size = MAX_SEND_BUFFERS_PER_QUEUE * COMP_ENTRY_SIZE; + cq_size = apc->tx_queue_size * COMP_ENTRY_SIZE; cq_size = MANA_PAGE_ALIGN(cq_size); gc = gd->gdma_context; @@ -2145,10 +2146,11 @@ static int mana_push_wqe(struct mana_rxq *rxq) static int mana_create_page_pool(struct mana_rxq *rxq, struct gdma_context *gc) { + struct mana_port_context *mpc = netdev_priv(rxq->ndev); struct page_pool_params pprm = {}; int ret; - pprm.pool_size = RX_BUFFERS_PER_QUEUE; + pprm.pool_size = mpc->rx_queue_size; pprm.nid = gc->numa_node; pprm.napi = &rxq->rx_cq.napi; pprm.netdev = rxq->ndev; @@ -2180,13 +2182,13 @@ static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, gc = gd->gdma_context; - rxq = kzalloc(struct_size(rxq, rx_oobs, RX_BUFFERS_PER_QUEUE), + rxq = kzalloc(struct_size(rxq, rx_oobs, apc->rx_queue_size), GFP_KERNEL); if (!rxq) return NULL; rxq->ndev = ndev; - rxq->num_rx_buf = RX_BUFFERS_PER_QUEUE; + rxq->num_rx_buf = apc->rx_queue_size; rxq->rxq_idx = rxq_idx; rxq->rxobj = INVALID_MANA_HANDLE; @@ -2734,6 +2736,8 @@ static int mana_probe_port(struct mana_context *ac, int port_idx, apc->ndev = ndev; apc->max_queues = gc->max_num_queues; apc->num_queues = gc->max_num_queues; + apc->tx_queue_size = DEF_TX_BUFFERS_PER_QUEUE; + apc->rx_queue_size = DEF_RX_BUFFERS_PER_QUEUE; apc->port_handle = INVALID_MANA_HANDLE; apc->pf_filter_handle = INVALID_MANA_HANDLE; apc->port_idx = port_idx; diff --git a/drivers/net/ethernet/microsoft/mana/mana_ethtool.c b/drivers/net/ethernet/microsoft/mana/mana_ethtool.c index 146d5db1792f..7a4752dda7b8 100644 --- a/drivers/net/ethernet/microsoft/mana/mana_ethtool.c +++ b/drivers/net/ethernet/microsoft/mana/mana_ethtool.c @@ -369,6 +369,83 @@ static int mana_set_channels(struct net_device *ndev, return err; } +static void mana_get_ringparam(struct net_device *ndev, + struct ethtool_ringparam *ring, + struct kernel_ethtool_ringparam *kernel_ring, + struct netlink_ext_ack *extack) +{ + struct mana_port_context *apc = netdev_priv(ndev); + + ring->rx_pending = apc->rx_queue_size; + ring->tx_pending = apc->tx_queue_size; + ring->rx_max_pending = MAX_RX_BUFFERS_PER_QUEUE; + ring->tx_max_pending = MAX_TX_BUFFERS_PER_QUEUE; +} + +static int mana_set_ringparam(struct net_device *ndev, + struct ethtool_ringparam *ring, + struct kernel_ethtool_ringparam *kernel_ring, + struct netlink_ext_ack *extack) +{ + struct mana_port_context *apc = netdev_priv(ndev); + u32 new_tx, new_rx; + u32 old_tx, old_rx; + int err1, err2; + + if (ring->rx_jumbo_pending) { + netdev_err(ndev, "%s: rx_jumbo_pending not supported\n", __func__); + return -EINVAL; + } + if (ring->rx_mini_pending) { + netdev_err(ndev, "%s: rx_mini_pending not supported\n", __func__); + return -EINVAL; + } + + if (!apc) + return -EINVAL; + + old_tx = apc->tx_queue_size; + old_rx = apc->rx_queue_size; + new_tx = clamp_t(u32, ring->tx_pending, MIN_TX_BUFFERS_PER_QUEUE, MAX_TX_BUFFERS_PER_QUEUE); + new_rx = clamp_t(u32, ring->rx_pending, MIN_RX_BUFFERS_PER_QUEUE, MAX_RX_BUFFERS_PER_QUEUE); + + if (new_tx == old_tx && new_rx == old_rx) + return 0; + + if (!is_power_of_2(new_tx)) { + netdev_err(ndev, "%s:Tx:%d not supported\n", __func__, new_tx); + return -EINVAL; + } + + if (!is_power_of_2(new_rx)) { + netdev_err(ndev, "%s:Rx:%d not supported\n", __func__, new_rx); + return -EINVAL; + } + + err1 = mana_detach(ndev, false); + if (err1) { + netdev_err(ndev, "mana_detach failed: %d\n", err1); + return err1; + } + + apc->tx_queue_size = new_tx; + apc->rx_queue_size = new_rx; + err1 = mana_attach(ndev); + if (!err1) + return 0; + + netdev_err(ndev, "mana_attach failed: %d\n", err1); + + /* Try rolling back to the older values */ + apc->tx_queue_size = old_tx; + apc->rx_queue_size = old_rx; + err2 = mana_attach(ndev); + if (err2) + netdev_err(ndev, "mana_reattach failed: %d\n", err2); + + return err1; +} + const struct ethtool_ops mana_ethtool_ops = { .get_ethtool_stats = mana_get_ethtool_stats, .get_sset_count = mana_get_sset_count, @@ -380,4 +457,6 @@ const struct ethtool_ops mana_ethtool_ops = { .set_rxfh = mana_set_rxfh, .get_channels = mana_get_channels, .set_channels = mana_set_channels, + .get_ringparam = mana_get_ringparam, + .set_ringparam = mana_set_ringparam, }; diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h index e39b8676fe54..3e27ca5155aa 100644 --- a/include/net/mana/mana.h +++ b/include/net/mana/mana.h @@ -38,9 +38,21 @@ enum TRI_STATE { #define COMP_ENTRY_SIZE 64 -#define RX_BUFFERS_PER_QUEUE 512 +/* This Max value for RX buffers is derived from __alloc_page()'s max page + * allocation calculation. It allows maximum 2^(MAX_ORDER -1) pages. RX buffer + * size beyond this value gets rejected by __alloc_page() call. + */ +#define MAX_RX_BUFFERS_PER_QUEUE 8192 +#define DEF_RX_BUFFERS_PER_QUEUE 512 +#define MIN_RX_BUFFERS_PER_QUEUE 128 -#define MAX_SEND_BUFFERS_PER_QUEUE 256 +/* This max value for TX buffers is dervied as the maximum allocatable + * pages supported on host per guest through testing. TX buffer size beyond + * this value is rejected by the hardware. + */ +#define MAX_TX_BUFFERS_PER_QUEUE 16384 +#define DEF_TX_BUFFERS_PER_QUEUE 256 +#define MIN_TX_BUFFERS_PER_QUEUE 128 #define EQ_SIZE (8 * MANA_PAGE_SIZE) @@ -285,7 +297,7 @@ struct mana_recv_buf_oob { void *buf_va; bool from_pool; /* allocated from a page pool */ - /* SGL of the buffer going to be sent has part of the work request. */ + /* SGL of the buffer going to be sent as part of the work request. */ u32 num_sge; struct gdma_sge sgl[MAX_RX_WQE_SGL_ENTRIES]; @@ -437,6 +449,9 @@ struct mana_port_context { unsigned int max_queues; unsigned int num_queues; + unsigned int rx_queue_size; + unsigned int tx_queue_size; + mana_handle_t port_handle; mana_handle_t pf_filter_handle; -- 2.34.1