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SubjectRe: [PATCH 2.6.36-rc8] net-next: Add multiqueue support to vmxnet3 v2driver


On Mon, 1 Nov 2010, Shreyas Bhatewara wrote:

David/Stephen,

Any word about this patch ? To list out the changes made to the patch
since last time :

- Added ethtool handlers for configuring RSS table and getting # rx queues
- Removed module parameters which were not strictly required. Eg. Those required
for the above configuration
- Introduced module parameter to enable/disable multiqueue capability of
the driver

Thanks.
Shreyas

Reviewed-by: Bhavesh Davda <bhavesh@vmware.com>

>
>
> Add multiqueue support to vmxnet3 driver
>
> This change adds Multiqueue and thus receive side scaling support
> to vmxnet3 device driver. Number of rx queues is limited to 1 in cases
> where
> - MSI is not configured or
> - One MSIx vector is not available per rx queue
>
> By default multiqueue capability is turned off and hence only 1 tx and 1 rx
> queue will be initialized. enable_mq module param should be set to
> configure number of tx and rx queues equal to number of online CPUs. A
> maximum of 8 tx/rx queues are allowed for any adapter.
>
> Signed-off-by: Shreyas Bhatewara <sbhatewara@vmware.com>
>
> ---
>
> 2nd revision of the patch.
>
> In this revision, module params which are not strictly required have been
> removed and ethtool callback handlers have been implemented instead.
> Handlers to provide # rx queues and to get/set RSS indirection table are added.
> Information like Number of queues and how they share irqs is required at
> driver attach time. Adding ethtool interfaces cannot help in this regards.
> Hence two module params have been introduced : enable_mq (to configure if
> multiple queues should be used) and irq_share_mode to configure the way in
> which irqs will be shared among queues.
>
>
> diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
> index 3f60e0e..3ed4be6 100644
> --- a/drivers/net/vmxnet3/vmxnet3_drv.c
> +++ b/drivers/net/vmxnet3/vmxnet3_drv.c
> @@ -44,6 +44,26 @@ MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table);
>
> static atomic_t devices_found;
>
> +#define VMXNET3_MAX_DEVICES 10
> +static int enable_mq[VMXNET3_MAX_DEVICES + 1] = {
> + [0 ... VMXNET3_MAX_DEVICES] = 0 };
> +static int irq_share_mode[VMXNET3_MAX_DEVICES + 1] = {
> + [0 ... VMXNET3_MAX_DEVICES] = VMXNET3_INTR_BUDDYSHARE };
> +
> +static unsigned int num_adapters;
> +module_param_array(irq_share_mode, int, &num_adapters, 0400);
> +MODULE_PARM_DESC(irq_share_mode, "Comma separated list of ints, configuring "
> + "mode in which irqs should be shared by tx and rx queues. When"
> + " set to 0, no irqs are shared, each tx and rx queue allocate"
> + " and use a separate irq. Set to 1, all tx queues share an irq"
> + ". Set to 2, corresponding tx and rx queues share an irq."
> + " Default is 2.");
> +module_param_array(enable_mq, int, &num_adapters, 0400);
> +MODULE_PARM_DESC(enable_mq, "Comma separated list of integers, one for each "
> + "adapter. When set to a non-zero value, multiqueue will be "
> + "enabled and number of tx and rx queues will be same as number"
> + " of CPUs online. number of queues will be 1 otherwise. "
> + "Default is 0 - multiqueue disabled.");
>
> /*
> * Enable/Disable the given intr
> @@ -107,7 +127,7 @@ static void
> vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
> {
> tq->stopped = false;
> - netif_start_queue(adapter->netdev);
> + netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue);
> }
>
>
> @@ -115,7 +135,7 @@ static void
> vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
> {
> tq->stopped = false;
> - netif_wake_queue(adapter->netdev);
> + netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue));
> }
>
>
> @@ -124,7 +144,7 @@ vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
> {
> tq->stopped = true;
> tq->num_stop++;
> - netif_stop_queue(adapter->netdev);
> + netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue));
> }
>
>
> @@ -135,6 +155,7 @@ static void
> vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue)
> {
> u32 ret;
> + int i;
>
> VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK);
> ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
> @@ -145,22 +166,28 @@ vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue)
> if (!netif_carrier_ok(adapter->netdev))
> netif_carrier_on(adapter->netdev);
>
> - if (affectTxQueue)
> - vmxnet3_tq_start(&adapter->tx_queue, adapter);
> + if (affectTxQueue) {
> + for (i = 0; i < adapter->num_tx_queues; i++)
> + vmxnet3_tq_start(&adapter->tx_queue[i],
> + adapter);
> + }
> } else {
> printk(KERN_INFO "%s: NIC Link is Down\n",
> adapter->netdev->name);
> if (netif_carrier_ok(adapter->netdev))
> netif_carrier_off(adapter->netdev);
>
> - if (affectTxQueue)
> - vmxnet3_tq_stop(&adapter->tx_queue, adapter);
> + if (affectTxQueue) {
> + for (i = 0; i < adapter->num_tx_queues; i++)
> + vmxnet3_tq_stop(&adapter->tx_queue[i], adapter);
> + }
> }
> }
>
> static void
> vmxnet3_process_events(struct vmxnet3_adapter *adapter)
> {
> + int i;
> u32 events = le32_to_cpu(adapter->shared->ecr);
> if (!events)
> return;
> @@ -176,16 +203,18 @@ vmxnet3_process_events(struct vmxnet3_adapter *adapter)
> VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
> VMXNET3_CMD_GET_QUEUE_STATUS);
>
> - if (adapter->tqd_start->status.stopped) {
> - printk(KERN_ERR "%s: tq error 0x%x\n",
> - adapter->netdev->name,
> - le32_to_cpu(adapter->tqd_start->status.error));
> - }
> - if (adapter->rqd_start->status.stopped) {
> - printk(KERN_ERR "%s: rq error 0x%x\n",
> - adapter->netdev->name,
> - adapter->rqd_start->status.error);
> - }
> + for (i = 0; i < adapter->num_tx_queues; i++)
> + if (adapter->tqd_start[i].status.stopped)
> + dev_dbg(&adapter->netdev->dev,
> + "%s: tq[%d] error 0x%x\n",
> + adapter->netdev->name, i, le32_to_cpu(
> + adapter->tqd_start[i].status.error));
> + for (i = 0; i < adapter->num_rx_queues; i++)
> + if (adapter->rqd_start[i].status.stopped)
> + dev_dbg(&adapter->netdev->dev,
> + "%s: rq[%d] error 0x%x\n",
> + adapter->netdev->name, i,
> + adapter->rqd_start[i].status.error);
>
> schedule_work(&adapter->work);
> }
> @@ -410,7 +439,7 @@ vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq,
> }
>
>
> -void
> +static void
> vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
> struct vmxnet3_adapter *adapter)
> {
> @@ -437,6 +466,17 @@ vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
> }
>
>
> +/* Destroy all tx queues */
> +void
> +vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter)
> +{
> + int i;
> +
> + for (i = 0; i < adapter->num_tx_queues; i++)
> + vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter);
> +}
> +
> +
> static void
> vmxnet3_tq_init(struct vmxnet3_tx_queue *tq,
> struct vmxnet3_adapter *adapter)
> @@ -518,6 +558,14 @@ err:
> return -ENOMEM;
> }
>
> +static void
> +vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter)
> +{
> + int i;
> +
> + for (i = 0; i < adapter->num_tx_queues; i++)
> + vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter);
> +}
>
> /*
> * starting from ring->next2fill, allocate rx buffers for the given ring
> @@ -732,6 +780,17 @@ vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
> }
>
>
> +/* Init all tx queues */
> +static void
> +vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter)
> +{
> + int i;
> +
> + for (i = 0; i < adapter->num_tx_queues; i++)
> + vmxnet3_tq_init(&adapter->tx_queue[i], adapter);
> +}
> +
> +
> /*
> * parse and copy relevant protocol headers:
> * For a tso pkt, relevant headers are L2/3/4 including options
> @@ -1000,8 +1059,8 @@ vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
> if (le32_to_cpu(tq->shared->txNumDeferred) >=
> le32_to_cpu(tq->shared->txThreshold)) {
> tq->shared->txNumDeferred = 0;
> - VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_TXPROD,
> - tq->tx_ring.next2fill);
> + VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_TXPROD +
> + tq->qid * 8), tq->tx_ring.next2fill);
> }
>
> return NETDEV_TX_OK;
> @@ -1020,7 +1079,10 @@ vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
> {
> struct vmxnet3_adapter *adapter = netdev_priv(netdev);
>
> - return vmxnet3_tq_xmit(skb, &adapter->tx_queue, adapter, netdev);
> + BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
> + return vmxnet3_tq_xmit(skb,
> + &adapter->tx_queue[skb->queue_mapping],
> + adapter, netdev);
> }
>
>
> @@ -1106,9 +1168,9 @@ vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
> break;
> }
> num_rxd++;
> -
> + BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2);
> idx = rcd->rxdIdx;
> - ring_idx = rcd->rqID == rq->qid ? 0 : 1;
> + ring_idx = rcd->rqID < adapter->num_rx_queues ? 0 : 1;
> vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd,
> &rxCmdDesc);
> rbi = rq->buf_info[ring_idx] + idx;
> @@ -1260,6 +1322,16 @@ vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
> }
>
>
> +static void
> +vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter)
> +{
> + int i;
> +
> + for (i = 0; i < adapter->num_rx_queues; i++)
> + vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter);
> +}
> +
> +
> void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
> struct vmxnet3_adapter *adapter)
> {
> @@ -1351,6 +1423,25 @@ vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
>
>
> static int
> +vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter)
> +{
> + int i, err = 0;
> +
> + for (i = 0; i < adapter->num_rx_queues; i++) {
> + err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter);
> + if (unlikely(err)) {
> + dev_err(&adapter->netdev->dev, "%s: failed to "
> + "initialize rx queue%i\n",
> + adapter->netdev->name, i);
> + break;
> + }
> + }
> + return err;
> +
> +}
> +
> +
> +static int
> vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
> {
> int i;
> @@ -1398,32 +1489,176 @@ err:
>
>
> static int
> +vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter)
> +{
> + int i, err = 0;
> +
> + for (i = 0; i < adapter->num_rx_queues; i++) {
> + err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter);
> + if (unlikely(err)) {
> + dev_err(&adapter->netdev->dev,
> + "%s: failed to create rx queue%i\n",
> + adapter->netdev->name, i);
> + goto err_out;
> + }
> + }
> + return err;
> +err_out:
> + vmxnet3_rq_destroy_all(adapter);
> + return err;
> +
> +}
> +
> +/* Multiple queue aware polling function for tx and rx */
> +
> +static int
> vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
> {
> + int rcd_done = 0, i;
> if (unlikely(adapter->shared->ecr))
> vmxnet3_process_events(adapter);
> + for (i = 0; i < adapter->num_tx_queues; i++)
> + vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter);
>
> - vmxnet3_tq_tx_complete(&adapter->tx_queue, adapter);
> - return vmxnet3_rq_rx_complete(&adapter->rx_queue, adapter, budget);
> + for (i = 0; i < adapter->num_rx_queues; i++)
> + rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i],
> + adapter, budget);
> + return rcd_done;
> }
>
>
> static int
> vmxnet3_poll(struct napi_struct *napi, int budget)
> {
> - struct vmxnet3_adapter *adapter = container_of(napi,
> - struct vmxnet3_adapter, napi);
> + struct vmxnet3_rx_queue *rx_queue = container_of(napi,
> + struct vmxnet3_rx_queue, napi);
> int rxd_done;
>
> - rxd_done = vmxnet3_do_poll(adapter, budget);
> + rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget);
>
> if (rxd_done < budget) {
> napi_complete(napi);
> - vmxnet3_enable_intr(adapter, 0);
> + vmxnet3_enable_all_intrs(rx_queue->adapter);
> }
> return rxd_done;
> }
>
> +/*
> + * NAPI polling function for MSI-X mode with multiple Rx queues
> + * Returns the # of the NAPI credit consumed (# of rx descriptors processed)
> + */
> +
> +static int
> +vmxnet3_poll_rx_only(struct napi_struct *napi, int budget)
> +{
> + struct vmxnet3_rx_queue *rq = container_of(napi,
> + struct vmxnet3_rx_queue, napi);
> + struct vmxnet3_adapter *adapter = rq->adapter;
> + int rxd_done;
> +
> + /* When sharing interrupt with corresponding tx queue, process
> + * tx completions in that queue as well
> + */
> + if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
> + struct vmxnet3_tx_queue *tq =
> + &adapter->tx_queue[rq - adapter->rx_queue];
> + vmxnet3_tq_tx_complete(tq, adapter);
> + }
> +
> + rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget);
> +
> + if (rxd_done < budget) {
> + napi_complete(napi);
> + vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx);
> + }
> + return rxd_done;
> +}
> +
> +
> +#ifdef CONFIG_PCI_MSI
> +
> +/*
> + * Handle completion interrupts on tx queues
> + * Returns whether or not the intr is handled
> + */
> +
> +static irqreturn_t
> +vmxnet3_msix_tx(int irq, void *data)
> +{
> + struct vmxnet3_tx_queue *tq = data;
> + struct vmxnet3_adapter *adapter = tq->adapter;
> +
> + if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
> + vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx);
> +
> + /* Handle the case where only one irq is allocate for all tx queues */
> + if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
> + int i;
> + for (i = 0; i < adapter->num_tx_queues; i++) {
> + struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i];
> + vmxnet3_tq_tx_complete(txq, adapter);
> + }
> + } else {
> + vmxnet3_tq_tx_complete(tq, adapter);
> + }
> + vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx);
> +
> + return IRQ_HANDLED;
> +}
> +
> +
> +/*
> + * Handle completion interrupts on rx queues. Returns whether or not the
> + * intr is handled
> + */
> +
> +static irqreturn_t
> +vmxnet3_msix_rx(int irq, void *data)
> +{
> + struct vmxnet3_rx_queue *rq = data;
> + struct vmxnet3_adapter *adapter = rq->adapter;
> +
> + /* disable intr if needed */
> + if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
> + vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx);
> + napi_schedule(&rq->napi);
> +
> + return IRQ_HANDLED;
> +}
> +
> +/*
> + *----------------------------------------------------------------------------
> + *
> + * vmxnet3_msix_event --
> + *
> + * vmxnet3 msix event intr handler
> + *
> + * Result:
> + * whether or not the intr is handled
> + *
> + *----------------------------------------------------------------------------
> + */
> +
> +static irqreturn_t
> +vmxnet3_msix_event(int irq, void *data)
> +{
> + struct net_device *dev = data;
> + struct vmxnet3_adapter *adapter = netdev_priv(dev);
> +
> + /* disable intr if needed */
> + if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
> + vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx);
> +
> + if (adapter->shared->ecr)
> + vmxnet3_process_events(adapter);
> +
> + vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx);
> +
> + return IRQ_HANDLED;
> +}
> +
> +#endif /* CONFIG_PCI_MSI */
> +
>
> /* Interrupt handler for vmxnet3 */
> static irqreturn_t
> @@ -1432,7 +1667,7 @@ vmxnet3_intr(int irq, void *dev_id)
> struct net_device *dev = dev_id;
> struct vmxnet3_adapter *adapter = netdev_priv(dev);
>
> - if (unlikely(adapter->intr.type == VMXNET3_IT_INTX)) {
> + if (adapter->intr.type == VMXNET3_IT_INTX) {
> u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
> if (unlikely(icr == 0))
> /* not ours */
> @@ -1442,77 +1677,136 @@ vmxnet3_intr(int irq, void *dev_id)
>
> /* disable intr if needed */
> if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
> - vmxnet3_disable_intr(adapter, 0);
> + vmxnet3_disable_all_intrs(adapter);
>
> - napi_schedule(&adapter->napi);
> + napi_schedule(&adapter->rx_queue[0].napi);
>
> return IRQ_HANDLED;
> }
>
> #ifdef CONFIG_NET_POLL_CONTROLLER
>
> -
> /* netpoll callback. */
> static void
> vmxnet3_netpoll(struct net_device *netdev)
> {
> struct vmxnet3_adapter *adapter = netdev_priv(netdev);
> - int irq;
>
> -#ifdef CONFIG_PCI_MSI
> - if (adapter->intr.type == VMXNET3_IT_MSIX)
> - irq = adapter->intr.msix_entries[0].vector;
> - else
> -#endif
> - irq = adapter->pdev->irq;
> + if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
> + vmxnet3_disable_all_intrs(adapter);
> +
> + vmxnet3_do_poll(adapter, adapter->rx_queue[0].rx_ring[0].size);
> + vmxnet3_enable_all_intrs(adapter);
>
> - disable_irq(irq);
> - vmxnet3_intr(irq, netdev);
> - enable_irq(irq);
> }
> -#endif
> +#endif /* CONFIG_NET_POLL_CONTROLLER */
>
> static int
> vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
> {
> - int err;
> + struct vmxnet3_intr *intr = &adapter->intr;
> + int err = 0, i;
> + int vector = 0;
>
> #ifdef CONFIG_PCI_MSI
> if (adapter->intr.type == VMXNET3_IT_MSIX) {
> - /* we only use 1 MSI-X vector */
> - err = request_irq(adapter->intr.msix_entries[0].vector,
> - vmxnet3_intr, 0, adapter->netdev->name,
> - adapter->netdev);
> - } else if (adapter->intr.type == VMXNET3_IT_MSI) {
> + for (i = 0; i < adapter->num_tx_queues; i++) {
> + sprintf(adapter->tx_queue[i].name, "%s:v%d-%s",
> + adapter->netdev->name, vector, "Tx");
> + if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE)
> + err = request_irq(
> + intr->msix_entries[vector].vector,
> + vmxnet3_msix_tx, 0,
> + adapter->tx_queue[i].name,
> + &adapter->tx_queue[i]);
> + if (err) {
> + dev_err(&adapter->netdev->dev,
> + "Failed to request irq for MSIX, %s, "
> + "error %d\n",
> + adapter->tx_queue[i].name, err);
> + return err;
> + }
> +
> + /* Handle the case where only 1 MSIx was allocated for
> + * all tx queues */
> + if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
> + for (; i < adapter->num_tx_queues; i++)
> + adapter->tx_queue[i].comp_ring.intr_idx
> + = vector;
> + vector++;
> + break;
> + } else {
> + adapter->tx_queue[i].comp_ring.intr_idx
> + = vector++;
> + }
> + }
> + if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE)
> + vector = 0;
> +
> + for (i = 0; i < adapter->num_rx_queues; i++) {
> + sprintf(adapter->rx_queue[i].name, "%s:v%d-%s",
> + adapter->netdev->name, vector, "Rx");
> + err = request_irq(intr->msix_entries[vector].vector,
> + vmxnet3_msix_rx, 0,
> + adapter->rx_queue[i].name,
> + &(adapter->rx_queue[i]));
> + if (err) {
> + printk(KERN_ERR "Failed to request irq for MSIX"
> + ", %s, error %d\n",
> + adapter->rx_queue[i].name, err);
> + return err;
> + }
> +
> + adapter->rx_queue[i].comp_ring.intr_idx = vector++;
> + }
> +
> + sprintf(intr->event_msi_vector_name, "%s:v%d-event",
> + adapter->netdev->name, vector);
> + err = request_irq(intr->msix_entries[vector].vector,
> + vmxnet3_msix_event, 0,
> + intr->event_msi_vector_name, adapter->netdev);
> + intr->event_intr_idx = vector;
> +
> + } else if (intr->type == VMXNET3_IT_MSI) {
> + adapter->num_rx_queues = 1;
> err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
> adapter->netdev->name, adapter->netdev);
> - } else
> + } else {
> #endif
> - {
> + adapter->num_rx_queues = 1;
> err = request_irq(adapter->pdev->irq, vmxnet3_intr,
> IRQF_SHARED, adapter->netdev->name,
> adapter->netdev);
> +#ifdef CONFIG_PCI_MSI
> }
> -
> - if (err)
> +#endif
> + intr->num_intrs = vector + 1;
> + if (err) {
> printk(KERN_ERR "Failed to request irq %s (intr type:%d), error"
> - ":%d\n", adapter->netdev->name, adapter->intr.type, err);
> + ":%d\n", adapter->netdev->name, intr->type, err);
> + } else {
> + /* Number of rx queues will not change after this */
> + for (i = 0; i < adapter->num_rx_queues; i++) {
> + struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
> + rq->qid = i;
> + rq->qid2 = i + adapter->num_rx_queues;
> + }
>
>
> - if (!err) {
> - int i;
> - /* init our intr settings */
> - for (i = 0; i < adapter->intr.num_intrs; i++)
> - adapter->intr.mod_levels[i] = UPT1_IML_ADAPTIVE;
>
> - /* next setup intr index for all intr sources */
> - adapter->tx_queue.comp_ring.intr_idx = 0;
> - adapter->rx_queue.comp_ring.intr_idx = 0;
> - adapter->intr.event_intr_idx = 0;
> + /* init our intr settings */
> + for (i = 0; i < intr->num_intrs; i++)
> + intr->mod_levels[i] = UPT1_IML_ADAPTIVE;
> + if (adapter->intr.type != VMXNET3_IT_MSIX) {
> + adapter->intr.event_intr_idx = 0;
> + for (i = 0; i < adapter->num_tx_queues; i++)
> + adapter->tx_queue[i].comp_ring.intr_idx = 0;
> + adapter->rx_queue[0].comp_ring.intr_idx = 0;
> + }
>
> printk(KERN_INFO "%s: intr type %u, mode %u, %u vectors "
> - "allocated\n", adapter->netdev->name, adapter->intr.type,
> - adapter->intr.mask_mode, adapter->intr.num_intrs);
> + "allocated\n", adapter->netdev->name, intr->type,
> + intr->mask_mode, intr->num_intrs);
> }
>
> return err;
> @@ -1522,18 +1816,32 @@ vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
> static void
> vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
> {
> - BUG_ON(adapter->intr.type == VMXNET3_IT_AUTO ||
> - adapter->intr.num_intrs <= 0);
> + struct vmxnet3_intr *intr = &adapter->intr;
> + BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0);
>
> - switch (adapter->intr.type) {
> + switch (intr->type) {
> #ifdef CONFIG_PCI_MSI
> case VMXNET3_IT_MSIX:
> {
> - int i;
> + int i, vector = 0;
> +
> + if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
> + for (i = 0; i < adapter->num_tx_queues; i++) {
> + free_irq(intr->msix_entries[vector++].vector,
> + &(adapter->tx_queue[i]));
> + if (adapter->share_intr == VMXNET3_INTR_TXSHARE)
> + break;
> + }
> + }
> +
> + for (i = 0; i < adapter->num_rx_queues; i++) {
> + free_irq(intr->msix_entries[vector++].vector,
> + &(adapter->rx_queue[i]));
> + }
>
> - for (i = 0; i < adapter->intr.num_intrs; i++)
> - free_irq(adapter->intr.msix_entries[i].vector,
> - adapter->netdev);
> + free_irq(intr->msix_entries[vector].vector,
> + adapter->netdev);
> + BUG_ON(vector >= intr->num_intrs);
> break;
> }
> #endif
> @@ -1729,6 +2037,15 @@ vmxnet3_set_mc(struct net_device *netdev)
> kfree(new_table);
> }
>
> +void
> +vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter)
> +{
> + int i;
> +
> + for (i = 0; i < adapter->num_rx_queues; i++)
> + vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter);
> +}
> +
>
> /*
> * Set up driver_shared based on settings in adapter.
> @@ -1776,40 +2093,72 @@ vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
> devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
> devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
> devRead->misc.queueDescLen = cpu_to_le32(
> - sizeof(struct Vmxnet3_TxQueueDesc) +
> - sizeof(struct Vmxnet3_RxQueueDesc));
> + adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) +
> + adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc));
>
> /* tx queue settings */
> - BUG_ON(adapter->tx_queue.tx_ring.base == NULL);
> -
> - devRead->misc.numTxQueues = 1;
> - tqc = &adapter->tqd_start->conf;
> - tqc->txRingBasePA = cpu_to_le64(adapter->tx_queue.tx_ring.basePA);
> - tqc->dataRingBasePA = cpu_to_le64(adapter->tx_queue.data_ring.basePA);
> - tqc->compRingBasePA = cpu_to_le64(adapter->tx_queue.comp_ring.basePA);
> - tqc->ddPA = cpu_to_le64(virt_to_phys(
> - adapter->tx_queue.buf_info));
> - tqc->txRingSize = cpu_to_le32(adapter->tx_queue.tx_ring.size);
> - tqc->dataRingSize = cpu_to_le32(adapter->tx_queue.data_ring.size);
> - tqc->compRingSize = cpu_to_le32(adapter->tx_queue.comp_ring.size);
> - tqc->ddLen = cpu_to_le32(sizeof(struct vmxnet3_tx_buf_info) *
> - tqc->txRingSize);
> - tqc->intrIdx = adapter->tx_queue.comp_ring.intr_idx;
> + devRead->misc.numTxQueues = adapter->num_tx_queues;
> + for (i = 0; i < adapter->num_tx_queues; i++) {
> + struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
> + BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL);
> + tqc = &adapter->tqd_start[i].conf;
> + tqc->txRingBasePA = cpu_to_le64(tq->tx_ring.basePA);
> + tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA);
> + tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA);
> + tqc->ddPA = cpu_to_le64(virt_to_phys(tq->buf_info));
> + tqc->txRingSize = cpu_to_le32(tq->tx_ring.size);
> + tqc->dataRingSize = cpu_to_le32(tq->data_ring.size);
> + tqc->compRingSize = cpu_to_le32(tq->comp_ring.size);
> + tqc->ddLen = cpu_to_le32(
> + sizeof(struct vmxnet3_tx_buf_info) *
> + tqc->txRingSize);
> + tqc->intrIdx = tq->comp_ring.intr_idx;
> + }
>
> /* rx queue settings */
> - devRead->misc.numRxQueues = 1;
> - rqc = &adapter->rqd_start->conf;
> - rqc->rxRingBasePA[0] = cpu_to_le64(adapter->rx_queue.rx_ring[0].basePA);
> - rqc->rxRingBasePA[1] = cpu_to_le64(adapter->rx_queue.rx_ring[1].basePA);
> - rqc->compRingBasePA = cpu_to_le64(adapter->rx_queue.comp_ring.basePA);
> - rqc->ddPA = cpu_to_le64(virt_to_phys(
> - adapter->rx_queue.buf_info));
> - rqc->rxRingSize[0] = cpu_to_le32(adapter->rx_queue.rx_ring[0].size);
> - rqc->rxRingSize[1] = cpu_to_le32(adapter->rx_queue.rx_ring[1].size);
> - rqc->compRingSize = cpu_to_le32(adapter->rx_queue.comp_ring.size);
> - rqc->ddLen = cpu_to_le32(sizeof(struct vmxnet3_rx_buf_info) *
> - (rqc->rxRingSize[0] + rqc->rxRingSize[1]));
> - rqc->intrIdx = adapter->rx_queue.comp_ring.intr_idx;
> + devRead->misc.numRxQueues = adapter->num_rx_queues;
> + for (i = 0; i < adapter->num_rx_queues; i++) {
> + struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
> + rqc = &adapter->rqd_start[i].conf;
> + rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA);
> + rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA);
> + rqc->compRingBasePA = cpu_to_le64(rq->comp_ring.basePA);
> + rqc->ddPA = cpu_to_le64(virt_to_phys(
> + rq->buf_info));
> + rqc->rxRingSize[0] = cpu_to_le32(rq->rx_ring[0].size);
> + rqc->rxRingSize[1] = cpu_to_le32(rq->rx_ring[1].size);
> + rqc->compRingSize = cpu_to_le32(rq->comp_ring.size);
> + rqc->ddLen = cpu_to_le32(
> + sizeof(struct vmxnet3_rx_buf_info) *
> + (rqc->rxRingSize[0] +
> + rqc->rxRingSize[1]));
> + rqc->intrIdx = rq->comp_ring.intr_idx;
> + }
> +
> +#ifdef VMXNET3_RSS
> + memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf));
> +
> + if (adapter->rss) {
> + struct UPT1_RSSConf *rssConf = adapter->rss_conf;
> + devRead->misc.uptFeatures |= UPT1_F_RSS;
> + devRead->misc.numRxQueues = adapter->num_rx_queues;
> + rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 |
> + UPT1_RSS_HASH_TYPE_IPV4 |
> + UPT1_RSS_HASH_TYPE_TCP_IPV6 |
> + UPT1_RSS_HASH_TYPE_IPV6;
> + rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ;
> + rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE;
> + rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE;
> + get_random_bytes(&rssConf->hashKey[0], rssConf->hashKeySize);
> + for (i = 0; i < rssConf->indTableSize; i++)
> + rssConf->indTable[i] = i % adapter->num_rx_queues;
> +
> + devRead->rssConfDesc.confVer = 1;
> + devRead->rssConfDesc.confLen = sizeof(*rssConf);
> + devRead->rssConfDesc.confPA = virt_to_phys(rssConf);
> + }
> +
> +#endif /* VMXNET3_RSS */
>
> /* intr settings */
> devRead->intrConf.autoMask = adapter->intr.mask_mode ==
> @@ -1831,18 +2180,18 @@ vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
> int
> vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
> {
> - int err;
> + int err, i;
> u32 ret;
>
> - dev_dbg(&adapter->netdev->dev,
> - "%s: skb_buf_size %d, rx_buf_per_pkt %d, ring sizes"
> - " %u %u %u\n", adapter->netdev->name, adapter->skb_buf_size,
> - adapter->rx_buf_per_pkt, adapter->tx_queue.tx_ring.size,
> - adapter->rx_queue.rx_ring[0].size,
> - adapter->rx_queue.rx_ring[1].size);
> -
> - vmxnet3_tq_init(&adapter->tx_queue, adapter);
> - err = vmxnet3_rq_init(&adapter->rx_queue, adapter);
> + dev_dbg(&adapter->netdev->dev, "%s: skb_buf_size %d, rx_buf_per_pkt %d,"
> + " ring sizes %u %u %u\n", adapter->netdev->name,
> + adapter->skb_buf_size, adapter->rx_buf_per_pkt,
> + adapter->tx_queue[0].tx_ring.size,
> + adapter->rx_queue[0].rx_ring[0].size,
> + adapter->rx_queue[0].rx_ring[1].size);
> +
> + vmxnet3_tq_init_all(adapter);
> + err = vmxnet3_rq_init_all(adapter);
> if (err) {
> printk(KERN_ERR "Failed to init rx queue for %s: error %d\n",
> adapter->netdev->name, err);
> @@ -1872,10 +2221,15 @@ vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
> err = -EINVAL;
> goto activate_err;
> }
> - VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_RXPROD,
> - adapter->rx_queue.rx_ring[0].next2fill);
> - VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_RXPROD2,
> - adapter->rx_queue.rx_ring[1].next2fill);
> +
> + for (i = 0; i < adapter->num_rx_queues; i++) {
> + VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD +
> + (i * VMXNET3_REG_ALIGN)),
> + adapter->rx_queue[i].rx_ring[0].next2fill);
> + VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 +
> + (i * VMXNET3_REG_ALIGN)),
> + adapter->rx_queue[i].rx_ring[1].next2fill);
> + }
>
> /* Apply the rx filter settins last. */
> vmxnet3_set_mc(adapter->netdev);
> @@ -1885,8 +2239,8 @@ vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
> * tx queue if the link is up.
> */
> vmxnet3_check_link(adapter, true);
> -
> - napi_enable(&adapter->napi);
> + for (i = 0; i < adapter->num_rx_queues; i++)
> + napi_enable(&adapter->rx_queue[i].napi);
> vmxnet3_enable_all_intrs(adapter);
> clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
> return 0;
> @@ -1898,7 +2252,7 @@ activate_err:
> irq_err:
> rq_err:
> /* free up buffers we allocated */
> - vmxnet3_rq_cleanup(&adapter->rx_queue, adapter);
> + vmxnet3_rq_cleanup_all(adapter);
> return err;
> }
>
> @@ -1913,6 +2267,7 @@ vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
> int
> vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
> {
> + int i;
> if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
> return 0;
>
> @@ -1921,13 +2276,14 @@ vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
> VMXNET3_CMD_QUIESCE_DEV);
> vmxnet3_disable_all_intrs(adapter);
>
> - napi_disable(&adapter->napi);
> + for (i = 0; i < adapter->num_rx_queues; i++)
> + napi_disable(&adapter->rx_queue[i].napi);
> netif_tx_disable(adapter->netdev);
> adapter->link_speed = 0;
> netif_carrier_off(adapter->netdev);
>
> - vmxnet3_tq_cleanup(&adapter->tx_queue, adapter);
> - vmxnet3_rq_cleanup(&adapter->rx_queue, adapter);
> + vmxnet3_tq_cleanup_all(adapter);
> + vmxnet3_rq_cleanup_all(adapter);
> vmxnet3_free_irqs(adapter);
> return 0;
> }
> @@ -2049,7 +2405,9 @@ vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
> static void
> vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
> {
> - size_t sz;
> + size_t sz, i, ring0_size, ring1_size, comp_size;
> + struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0];
> +
>
> if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
> VMXNET3_MAX_ETH_HDR_SIZE) {
> @@ -2071,11 +2429,19 @@ vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
> * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
> */
> sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
> - adapter->rx_queue.rx_ring[0].size = (adapter->rx_queue.rx_ring[0].size +
> - sz - 1) / sz * sz;
> - adapter->rx_queue.rx_ring[0].size = min_t(u32,
> - adapter->rx_queue.rx_ring[0].size,
> - VMXNET3_RX_RING_MAX_SIZE / sz * sz);
> + ring0_size = adapter->rx_queue[0].rx_ring[0].size;
> + ring0_size = (ring0_size + sz - 1) / sz * sz;
> + ring0_size = min_t(u32, rq->rx_ring[0].size, VMXNET3_RX_RING_MAX_SIZE /
> + sz * sz);
> + ring1_size = adapter->rx_queue[0].rx_ring[1].size;
> + comp_size = ring0_size + ring1_size;
> +
> + for (i = 0; i < adapter->num_rx_queues; i++) {
> + rq = &adapter->rx_queue[i];
> + rq->rx_ring[0].size = ring0_size;
> + rq->rx_ring[1].size = ring1_size;
> + rq->comp_ring.size = comp_size;
> + }
> }
>
>
> @@ -2083,29 +2449,53 @@ int
> vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
> u32 rx_ring_size, u32 rx_ring2_size)
> {
> - int err;
> -
> - adapter->tx_queue.tx_ring.size = tx_ring_size;
> - adapter->tx_queue.data_ring.size = tx_ring_size;
> - adapter->tx_queue.comp_ring.size = tx_ring_size;
> - adapter->tx_queue.shared = &adapter->tqd_start->ctrl;
> - adapter->tx_queue.stopped = true;
> - err = vmxnet3_tq_create(&adapter->tx_queue, adapter);
> - if (err)
> - return err;
> + int err = 0, i;
> +
> + for (i = 0; i < adapter->num_tx_queues; i++) {
> + struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
> + tq->tx_ring.size = tx_ring_size;
> + tq->data_ring.size = tx_ring_size;
> + tq->comp_ring.size = tx_ring_size;
> + tq->shared = &adapter->tqd_start[i].ctrl;
> + tq->stopped = true;
> + tq->adapter = adapter;
> + tq->qid = i;
> + err = vmxnet3_tq_create(tq, adapter);
> + /*
> + * Too late to change num_tx_queues. We cannot do away with
> + * lesser number of queues than what we asked for
> + */
> + if (err)
> + goto queue_err;
> + }
>
> - adapter->rx_queue.rx_ring[0].size = rx_ring_size;
> - adapter->rx_queue.rx_ring[1].size = rx_ring2_size;
> + adapter->rx_queue[0].rx_ring[0].size = rx_ring_size;
> + adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size;
> vmxnet3_adjust_rx_ring_size(adapter);
> - adapter->rx_queue.comp_ring.size = adapter->rx_queue.rx_ring[0].size +
> - adapter->rx_queue.rx_ring[1].size;
> - adapter->rx_queue.qid = 0;
> - adapter->rx_queue.qid2 = 1;
> - adapter->rx_queue.shared = &adapter->rqd_start->ctrl;
> - err = vmxnet3_rq_create(&adapter->rx_queue, adapter);
> - if (err)
> - vmxnet3_tq_destroy(&adapter->tx_queue, adapter);
> -
> + for (i = 0; i < adapter->num_rx_queues; i++) {
> + struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
> + /* qid and qid2 for rx queues will be assigned later when num
> + * of rx queues is finalized after allocating intrs */
> + rq->shared = &adapter->rqd_start[i].ctrl;
> + rq->adapter = adapter;
> + err = vmxnet3_rq_create(rq, adapter);
> + if (err) {
> + if (i == 0) {
> + printk(KERN_ERR "Could not allocate any rx"
> + "queues. Aborting.\n");
> + goto queue_err;
> + } else {
> + printk(KERN_INFO "Number of rx queues changed "
> + "to : %d.\n", i);
> + adapter->num_rx_queues = i;
> + err = 0;
> + break;
> + }
> + }
> + }
> + return err;
> +queue_err:
> + vmxnet3_tq_destroy_all(adapter);
> return err;
> }
>
> @@ -2113,11 +2503,12 @@ static int
> vmxnet3_open(struct net_device *netdev)
> {
> struct vmxnet3_adapter *adapter;
> - int err;
> + int err, i;
>
> adapter = netdev_priv(netdev);
>
> - spin_lock_init(&adapter->tx_queue.tx_lock);
> + for (i = 0; i < adapter->num_tx_queues; i++)
> + spin_lock_init(&adapter->tx_queue[i].tx_lock);
>
> err = vmxnet3_create_queues(adapter, VMXNET3_DEF_TX_RING_SIZE,
> VMXNET3_DEF_RX_RING_SIZE,
> @@ -2132,8 +2523,8 @@ vmxnet3_open(struct net_device *netdev)
> return 0;
>
> activate_err:
> - vmxnet3_rq_destroy(&adapter->rx_queue, adapter);
> - vmxnet3_tq_destroy(&adapter->tx_queue, adapter);
> + vmxnet3_rq_destroy_all(adapter);
> + vmxnet3_tq_destroy_all(adapter);
> queue_err:
> return err;
> }
> @@ -2153,8 +2544,8 @@ vmxnet3_close(struct net_device *netdev)
>
> vmxnet3_quiesce_dev(adapter);
>
> - vmxnet3_rq_destroy(&adapter->rx_queue, adapter);
> - vmxnet3_tq_destroy(&adapter->tx_queue, adapter);
> + vmxnet3_rq_destroy_all(adapter);
> + vmxnet3_tq_destroy_all(adapter);
>
> clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
>
> @@ -2166,6 +2557,8 @@ vmxnet3_close(struct net_device *netdev)
> void
> vmxnet3_force_close(struct vmxnet3_adapter *adapter)
> {
> + int i;
> +
> /*
> * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise
> * vmxnet3_close() will deadlock.
> @@ -2173,7 +2566,8 @@ vmxnet3_force_close(struct vmxnet3_adapter *adapter)
> BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state));
>
> /* we need to enable NAPI, otherwise dev_close will deadlock */
> - napi_enable(&adapter->napi);
> + for (i = 0; i < adapter->num_rx_queues; i++)
> + napi_enable(&adapter->rx_queue[i].napi);
> dev_close(adapter->netdev);
> }
>
> @@ -2204,14 +2598,11 @@ vmxnet3_change_mtu(struct net_device *netdev, int new_mtu)
> vmxnet3_reset_dev(adapter);
>
> /* we need to re-create the rx queue based on the new mtu */
> - vmxnet3_rq_destroy(&adapter->rx_queue, adapter);
> + vmxnet3_rq_destroy_all(adapter);
> vmxnet3_adjust_rx_ring_size(adapter);
> - adapter->rx_queue.comp_ring.size =
> - adapter->rx_queue.rx_ring[0].size +
> - adapter->rx_queue.rx_ring[1].size;
> - err = vmxnet3_rq_create(&adapter->rx_queue, adapter);
> + err = vmxnet3_rq_create_all(adapter);
> if (err) {
> - printk(KERN_ERR "%s: failed to re-create rx queue,"
> + printk(KERN_ERR "%s: failed to re-create rx queues,"
> " error %d. Closing it.\n", netdev->name, err);
> goto out;
> }
> @@ -2276,6 +2667,55 @@ vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
> mac[5] = (tmp >> 8) & 0xff;
> }
>
> +#ifdef CONFIG_PCI_MSI
> +
> +/*
> + * Enable MSIx vectors.
> + * Returns :
> + * 0 on successful enabling of required vectors,
> + * VMXNET3_LINUX_MIN_MSIX_VECT when only minumum number of vectors required
> + * could be enabled.
> + * number of vectors which can be enabled otherwise (this number is smaller
> + * than VMXNET3_LINUX_MIN_MSIX_VECT)
> + */
> +
> +static int
> +vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter,
> + int vectors)
> +{
> + int err = 0, vector_threshold;
> + vector_threshold = VMXNET3_LINUX_MIN_MSIX_VECT;
> +
> + while (vectors >= vector_threshold) {
> + err = pci_enable_msix(adapter->pdev, adapter->intr.msix_entries,
> + vectors);
> + if (!err) {
> + adapter->intr.num_intrs = vectors;
> + return 0;
> + } else if (err < 0) {
> + printk(KERN_ERR "Failed to enable MSI-X for %s, error"
> + " %d\n", adapter->netdev->name, err);
> + vectors = 0;
> + } else if (err < vector_threshold) {
> + break;
> + } else {
> + /* If fails to enable required number of MSI-x vectors
> + * try enabling 3 of them. One each for rx, tx and event
> + */
> + vectors = vector_threshold;
> + printk(KERN_ERR "Failed to enable %d MSI-X for %s, try"
> + " %d instead\n", vectors, adapter->netdev->name,
> + vector_threshold);
> + }
> + }
> +
> + printk(KERN_INFO "Number of MSI-X interrupts which can be allocatedi"
> + " are lower than min threshold required.\n");
> + return err;
> +}
> +
> +
> +#endif /* CONFIG_PCI_MSI */
>
> static void
> vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
> @@ -2295,16 +2735,47 @@ vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
>
> #ifdef CONFIG_PCI_MSI
> if (adapter->intr.type == VMXNET3_IT_MSIX) {
> - int err;
> -
> - adapter->intr.msix_entries[0].entry = 0;
> - err = pci_enable_msix(adapter->pdev, adapter->intr.msix_entries,
> - VMXNET3_LINUX_MAX_MSIX_VECT);
> - if (!err) {
> - adapter->intr.num_intrs = 1;
> - adapter->intr.type = VMXNET3_IT_MSIX;
> + int vector, err = 0;
> +
> + adapter->intr.num_intrs = (adapter->share_intr ==
> + VMXNET3_INTR_TXSHARE) ? 1 :
> + adapter->num_tx_queues;
> + adapter->intr.num_intrs += (adapter->share_intr ==
> + VMXNET3_INTR_BUDDYSHARE) ? 0 :
> + adapter->num_rx_queues;
> + adapter->intr.num_intrs += 1; /* for link event */
> +
> + adapter->intr.num_intrs = (adapter->intr.num_intrs >
> + VMXNET3_LINUX_MIN_MSIX_VECT
> + ? adapter->intr.num_intrs :
> + VMXNET3_LINUX_MIN_MSIX_VECT);
> +
> + for (vector = 0; vector < adapter->intr.num_intrs; vector++)
> + adapter->intr.msix_entries[vector].entry = vector;
> +
> + err = vmxnet3_acquire_msix_vectors(adapter,
> + adapter->intr.num_intrs);
> + /* If we cannot allocate one MSIx vector per queue
> + * then limit the number of rx queues to 1
> + */
> + if (err == VMXNET3_LINUX_MIN_MSIX_VECT) {
> + if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE
> + || adapter->num_rx_queues != 2) {
> + adapter->share_intr = VMXNET3_INTR_TXSHARE;
> + printk(KERN_ERR "Number of rx queues : 1\n");
> + adapter->num_rx_queues = 1;
> + adapter->intr.num_intrs =
> + VMXNET3_LINUX_MIN_MSIX_VECT;
> + }
> return;
> }
> + if (!err)
> + return;
> +
> + /* If we cannot allocate MSIx vectors use only one rx queue */
> + printk(KERN_INFO "Failed to enable MSI-X for %s, error %d."
> + "#rx queues : 1, try MSI\n", adapter->netdev->name, err);
> +
> adapter->intr.type = VMXNET3_IT_MSI;
> }
>
> @@ -2312,12 +2783,15 @@ vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
> int err;
> err = pci_enable_msi(adapter->pdev);
> if (!err) {
> + adapter->num_rx_queues = 1;
> adapter->intr.num_intrs = 1;
> return;
> }
> }
> #endif /* CONFIG_PCI_MSI */
>
> + adapter->num_rx_queues = 1;
> + printk(KERN_INFO "Using INTx interrupt, #Rx queues: 1.\n");
> adapter->intr.type = VMXNET3_IT_INTX;
>
> /* INT-X related setting */
> @@ -2345,6 +2819,7 @@ vmxnet3_tx_timeout(struct net_device *netdev)
>
> printk(KERN_ERR "%s: tx hang\n", adapter->netdev->name);
> schedule_work(&adapter->work);
> + netif_wake_queue(adapter->netdev);
> }
>
>
> @@ -2401,8 +2876,32 @@ vmxnet3_probe_device(struct pci_dev *pdev,
> struct net_device *netdev;
> struct vmxnet3_adapter *adapter;
> u8 mac[ETH_ALEN];
> + int size;
> + int num_tx_queues = enable_mq[atomic_read(&devices_found)] == 0 ? 1 : 0;
> + int num_rx_queues = enable_mq[atomic_read(&devices_found)] == 0 ? 1 : 0;
> +
> +#ifdef VMXNET3_RSS
> + if (num_rx_queues == 0)
> + num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
> + (int)num_online_cpus());
> + else
> + num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
> + num_rx_queues);
> +#else
> + num_rx_queues = 1;
> +#endif
> +
> + if (num_tx_queues <= 0)
> + num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
> + (int)num_online_cpus());
> + else
> + num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
> + num_tx_queues);
> + netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter),
> + num_tx_queues);
> + printk(KERN_INFO "# of Tx queues : %d, # of Rx queues : %d\n",
> + num_tx_queues, num_rx_queues);
>
> - netdev = alloc_etherdev(sizeof(struct vmxnet3_adapter));
> if (!netdev) {
> printk(KERN_ERR "Failed to alloc ethernet device for adapter "
> "%s\n", pci_name(pdev));
> @@ -2424,9 +2923,12 @@ vmxnet3_probe_device(struct pci_dev *pdev,
> goto err_alloc_shared;
> }
>
> - adapter->tqd_start = pci_alloc_consistent(adapter->pdev,
> - sizeof(struct Vmxnet3_TxQueueDesc) +
> - sizeof(struct Vmxnet3_RxQueueDesc),
> + adapter->num_rx_queues = num_rx_queues;
> + adapter->num_tx_queues = num_tx_queues;
> +
> + size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
> + size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;
> + adapter->tqd_start = pci_alloc_consistent(adapter->pdev, size,
> &adapter->queue_desc_pa);
>
> if (!adapter->tqd_start) {
> @@ -2435,8 +2937,8 @@ vmxnet3_probe_device(struct pci_dev *pdev,
> err = -ENOMEM;
> goto err_alloc_queue_desc;
> }
> - adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start
> - + 1);
> + adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start +
> + adapter->num_tx_queues);
>
> adapter->pm_conf = kmalloc(sizeof(struct Vmxnet3_PMConf), GFP_KERNEL);
> if (adapter->pm_conf == NULL) {
> @@ -2446,6 +2948,17 @@ vmxnet3_probe_device(struct pci_dev *pdev,
> goto err_alloc_pm;
> }
>
> +#ifdef VMXNET3_RSS
> +
> + adapter->rss_conf = kmalloc(sizeof(struct UPT1_RSSConf), GFP_KERNEL);
> + if (adapter->rss_conf == NULL) {
> + printk(KERN_ERR "Failed to allocate memory for %s\n",
> + pci_name(pdev));
> + err = -ENOMEM;
> + goto err_alloc_rss;
> + }
> +#endif /* VMXNET3_RSS */
> +
> err = vmxnet3_alloc_pci_resources(adapter, &dma64);
> if (err < 0)
> goto err_alloc_pci;
> @@ -2473,8 +2986,28 @@ vmxnet3_probe_device(struct pci_dev *pdev,
> vmxnet3_declare_features(adapter, dma64);
>
> adapter->dev_number = atomic_read(&devices_found);
> +
> + /*
> + * Sharing intr between corresponding tx and rx queues gets priority
> + * over all tx queues sharing an intr. Also, to use buddy interrupts
> + * number of tx queues should be same as number of rx queues.
> + */
> + if (irq_share_mode[adapter->dev_number] == VMXNET3_INTR_BUDDYSHARE &&
> + adapter->num_tx_queues != adapter->num_rx_queues)
> + adapter->share_intr = VMXNET3_INTR_DONTSHARE;
> +
> vmxnet3_alloc_intr_resources(adapter);
>
> +#ifdef VMXNET3_RSS
> + if (adapter->num_rx_queues > 1 &&
> + adapter->intr.type == VMXNET3_IT_MSIX) {
> + adapter->rss = true;
> + printk(KERN_INFO "RSS is enabled.\n");
> + } else {
> + adapter->rss = false;
> + }
> +#endif
> +
> vmxnet3_read_mac_addr(adapter, mac);
> memcpy(netdev->dev_addr, mac, netdev->addr_len);
>
> @@ -2484,7 +3017,18 @@ vmxnet3_probe_device(struct pci_dev *pdev,
>
> INIT_WORK(&adapter->work, vmxnet3_reset_work);
>
> - netif_napi_add(netdev, &adapter->napi, vmxnet3_poll, 64);
> + if (adapter->intr.type == VMXNET3_IT_MSIX) {
> + int i;
> + for (i = 0; i < adapter->num_rx_queues; i++) {
> + netif_napi_add(adapter->netdev,
> + &adapter->rx_queue[i].napi,
> + vmxnet3_poll_rx_only, 64);
> + }
> + } else {
> + netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi,
> + vmxnet3_poll, 64);
> + }
> +
> SET_NETDEV_DEV(netdev, &pdev->dev);
> err = register_netdev(netdev);
>
> @@ -2504,11 +3048,14 @@ err_register:
> err_ver:
> vmxnet3_free_pci_resources(adapter);
> err_alloc_pci:
> +#ifdef VMXNET3_RSS
> + kfree(adapter->rss_conf);
> +err_alloc_rss:
> +#endif
> kfree(adapter->pm_conf);
> err_alloc_pm:
> - pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_TxQueueDesc) +
> - sizeof(struct Vmxnet3_RxQueueDesc),
> - adapter->tqd_start, adapter->queue_desc_pa);
> + pci_free_consistent(adapter->pdev, size, adapter->tqd_start,
> + adapter->queue_desc_pa);
> err_alloc_queue_desc:
> pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared),
> adapter->shared, adapter->shared_pa);
> @@ -2524,6 +3071,19 @@ vmxnet3_remove_device(struct pci_dev *pdev)
> {
> struct net_device *netdev = pci_get_drvdata(pdev);
> struct vmxnet3_adapter *adapter = netdev_priv(netdev);
> + int size = 0;
> + int num_rx_queues = enable_mq[adapter->dev_number] == 0 ? 1 : 0;
> +
> +#ifdef VMXNET3_RSS
> + if (num_rx_queues <= 0)
> + num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
> + (int)num_online_cpus());
> + else
> + num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
> + num_rx_queues);
> +#else
> + num_rx_queues = 1;
> +#endif
>
> flush_scheduled_work();
>
> @@ -2531,10 +3091,15 @@ vmxnet3_remove_device(struct pci_dev *pdev)
>
> vmxnet3_free_intr_resources(adapter);
> vmxnet3_free_pci_resources(adapter);
> +#ifdef VMXNET3_RSS
> + kfree(adapter->rss_conf);
> +#endif
> kfree(adapter->pm_conf);
> - pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_TxQueueDesc) +
> - sizeof(struct Vmxnet3_RxQueueDesc),
> - adapter->tqd_start, adapter->queue_desc_pa);
> +
> + size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
> + size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues;
> + pci_free_consistent(adapter->pdev, size, adapter->tqd_start,
> + adapter->queue_desc_pa);
> pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared),
> adapter->shared, adapter->shared_pa);
> free_netdev(netdev);
> @@ -2565,7 +3130,7 @@ vmxnet3_suspend(struct device *device)
> vmxnet3_free_intr_resources(adapter);
>
> netif_device_detach(netdev);
> - netif_stop_queue(netdev);
> + netif_tx_stop_all_queues(netdev);
>
> /* Create wake-up filters. */
> pmConf = adapter->pm_conf;
> @@ -2710,6 +3275,7 @@ vmxnet3_init_module(void)
> {
> printk(KERN_INFO "%s - version %s\n", VMXNET3_DRIVER_DESC,
> VMXNET3_DRIVER_VERSION_REPORT);
> + atomic_set(&devices_found, 0);
> return pci_register_driver(&vmxnet3_driver);
> }
>
> @@ -2728,3 +3294,5 @@ MODULE_AUTHOR("VMware, Inc.");
> MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC);
> MODULE_LICENSE("GPL v2");
> MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING);
> +
> +
> diff --git a/drivers/net/vmxnet3/vmxnet3_ethtool.c b/drivers/net/vmxnet3/vmxnet3_ethtool.c
> index 7e4b5a8..73c2bf9 100644
> --- a/drivers/net/vmxnet3/vmxnet3_ethtool.c
> +++ b/drivers/net/vmxnet3/vmxnet3_ethtool.c
> @@ -153,44 +153,42 @@ vmxnet3_get_stats(struct net_device *netdev)
> struct UPT1_TxStats *devTxStats;
> struct UPT1_RxStats *devRxStats;
> struct net_device_stats *net_stats = &netdev->stats;
> + int i;
>
> adapter = netdev_priv(netdev);
>
> /* Collect the dev stats into the shared area */
> VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_STATS);
>
> - /* Assuming that we have a single queue device */
> - devTxStats = &adapter->tqd_start->stats;
> - devRxStats = &adapter->rqd_start->stats;
> -
> - /* Get access to the driver stats per queue */
> - drvTxStats = &adapter->tx_queue.stats;
> - drvRxStats = &adapter->rx_queue.stats;
> -
> memset(net_stats, 0, sizeof(*net_stats));
> + for (i = 0; i < adapter->num_tx_queues; i++) {
> + devTxStats = &adapter->tqd_start[i].stats;
> + drvTxStats = &adapter->tx_queue[i].stats;
> + net_stats->tx_packets += devTxStats->ucastPktsTxOK +
> + devTxStats->mcastPktsTxOK +
> + devTxStats->bcastPktsTxOK;
> + net_stats->tx_bytes += devTxStats->ucastBytesTxOK +
> + devTxStats->mcastBytesTxOK +
> + devTxStats->bcastBytesTxOK;
> + net_stats->tx_errors += devTxStats->pktsTxError;
> + net_stats->tx_dropped += drvTxStats->drop_total;
> + }
>
> - net_stats->rx_packets = devRxStats->ucastPktsRxOK +
> - devRxStats->mcastPktsRxOK +
> - devRxStats->bcastPktsRxOK;
> -
> - net_stats->tx_packets = devTxStats->ucastPktsTxOK +
> - devTxStats->mcastPktsTxOK +
> - devTxStats->bcastPktsTxOK;
> -
> - net_stats->rx_bytes = devRxStats->ucastBytesRxOK +
> - devRxStats->mcastBytesRxOK +
> - devRxStats->bcastBytesRxOK;
> -
> - net_stats->tx_bytes = devTxStats->ucastBytesTxOK +
> - devTxStats->mcastBytesTxOK +
> - devTxStats->bcastBytesTxOK;
> + for (i = 0; i < adapter->num_rx_queues; i++) {
> + devRxStats = &adapter->rqd_start[i].stats;
> + drvRxStats = &adapter->rx_queue[i].stats;
> + net_stats->rx_packets += devRxStats->ucastPktsRxOK +
> + devRxStats->mcastPktsRxOK +
> + devRxStats->bcastPktsRxOK;
>
> - net_stats->rx_errors = devRxStats->pktsRxError;
> - net_stats->tx_errors = devTxStats->pktsTxError;
> - net_stats->rx_dropped = drvRxStats->drop_total;
> - net_stats->tx_dropped = drvTxStats->drop_total;
> - net_stats->multicast = devRxStats->mcastPktsRxOK;
> + net_stats->rx_bytes += devRxStats->ucastBytesRxOK +
> + devRxStats->mcastBytesRxOK +
> + devRxStats->bcastBytesRxOK;
>
> + net_stats->rx_errors += devRxStats->pktsRxError;
> + net_stats->rx_dropped += drvRxStats->drop_total;
> + net_stats->multicast += devRxStats->mcastPktsRxOK;
> + }
> return net_stats;
> }
>
> @@ -309,24 +307,26 @@ vmxnet3_get_ethtool_stats(struct net_device *netdev,
> struct vmxnet3_adapter *adapter = netdev_priv(netdev);
> u8 *base;
> int i;
> + int j = 0;
>
> VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_STATS);
>
> /* this does assume each counter is 64-bit wide */
> +/* TODO change this for multiple queues */
>
> - base = (u8 *)&adapter->tqd_start->stats;
> + base = (u8 *)&adapter->tqd_start[j].stats;
> for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_dev_stats); i++)
> *buf++ = *(u64 *)(base + vmxnet3_tq_dev_stats[i].offset);
>
> - base = (u8 *)&adapter->tx_queue.stats;
> + base = (u8 *)&adapter->tx_queue[j].stats;
> for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_driver_stats); i++)
> *buf++ = *(u64 *)(base + vmxnet3_tq_driver_stats[i].offset);
>
> - base = (u8 *)&adapter->rqd_start->stats;
> + base = (u8 *)&adapter->rqd_start[j].stats;
> for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_dev_stats); i++)
> *buf++ = *(u64 *)(base + vmxnet3_rq_dev_stats[i].offset);
>
> - base = (u8 *)&adapter->rx_queue.stats;
> + base = (u8 *)&adapter->rx_queue[j].stats;
> for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_driver_stats); i++)
> *buf++ = *(u64 *)(base + vmxnet3_rq_driver_stats[i].offset);
>
> @@ -341,6 +341,7 @@ vmxnet3_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
> {
> struct vmxnet3_adapter *adapter = netdev_priv(netdev);
> u32 *buf = p;
> + int i = 0;
>
> memset(p, 0, vmxnet3_get_regs_len(netdev));
>
> @@ -349,28 +350,29 @@ vmxnet3_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
> /* Update vmxnet3_get_regs_len if we want to dump more registers */
>
> /* make each ring use multiple of 16 bytes */
> - buf[0] = adapter->tx_queue.tx_ring.next2fill;
> - buf[1] = adapter->tx_queue.tx_ring.next2comp;
> - buf[2] = adapter->tx_queue.tx_ring.gen;
> +/* TODO change this for multiple queues */
> + buf[0] = adapter->tx_queue[i].tx_ring.next2fill;
> + buf[1] = adapter->tx_queue[i].tx_ring.next2comp;
> + buf[2] = adapter->tx_queue[i].tx_ring.gen;
> buf[3] = 0;
>
> - buf[4] = adapter->tx_queue.comp_ring.next2proc;
> - buf[5] = adapter->tx_queue.comp_ring.gen;
> - buf[6] = adapter->tx_queue.stopped;
> + buf[4] = adapter->tx_queue[i].comp_ring.next2proc;
> + buf[5] = adapter->tx_queue[i].comp_ring.gen;
> + buf[6] = adapter->tx_queue[i].stopped;
> buf[7] = 0;
>
> - buf[8] = adapter->rx_queue.rx_ring[0].next2fill;
> - buf[9] = adapter->rx_queue.rx_ring[0].next2comp;
> - buf[10] = adapter->rx_queue.rx_ring[0].gen;
> + buf[8] = adapter->rx_queue[i].rx_ring[0].next2fill;
> + buf[9] = adapter->rx_queue[i].rx_ring[0].next2comp;
> + buf[10] = adapter->rx_queue[i].rx_ring[0].gen;
> buf[11] = 0;
>
> - buf[12] = adapter->rx_queue.rx_ring[1].next2fill;
> - buf[13] = adapter->rx_queue.rx_ring[1].next2comp;
> - buf[14] = adapter->rx_queue.rx_ring[1].gen;
> + buf[12] = adapter->rx_queue[i].rx_ring[1].next2fill;
> + buf[13] = adapter->rx_queue[i].rx_ring[1].next2comp;
> + buf[14] = adapter->rx_queue[i].rx_ring[1].gen;
> buf[15] = 0;
>
> - buf[16] = adapter->rx_queue.comp_ring.next2proc;
> - buf[17] = adapter->rx_queue.comp_ring.gen;
> + buf[16] = adapter->rx_queue[i].comp_ring.next2proc;
> + buf[17] = adapter->rx_queue[i].comp_ring.gen;
> buf[18] = 0;
> buf[19] = 0;
> }
> @@ -437,8 +439,10 @@ vmxnet3_get_ringparam(struct net_device *netdev,
> param->rx_mini_max_pending = 0;
> param->rx_jumbo_max_pending = 0;
>
> - param->rx_pending = adapter->rx_queue.rx_ring[0].size;
> - param->tx_pending = adapter->tx_queue.tx_ring.size;
> + param->rx_pending = adapter->rx_queue[0].rx_ring[0].size *
> + adapter->num_rx_queues;
> + param->tx_pending = adapter->tx_queue[0].tx_ring.size *
> + adapter->num_tx_queues;
> param->rx_mini_pending = 0;
> param->rx_jumbo_pending = 0;
> }
> @@ -482,8 +486,8 @@ vmxnet3_set_ringparam(struct net_device *netdev,
> sz) != 0)
> return -EINVAL;
>
> - if (new_tx_ring_size == adapter->tx_queue.tx_ring.size &&
> - new_rx_ring_size == adapter->rx_queue.rx_ring[0].size) {
> + if (new_tx_ring_size == adapter->tx_queue[0].tx_ring.size &&
> + new_rx_ring_size == adapter->rx_queue[0].rx_ring[0].size) {
> return 0;
> }
>
> @@ -500,11 +504,12 @@ vmxnet3_set_ringparam(struct net_device *netdev,
>
> /* recreate the rx queue and the tx queue based on the
> * new sizes */
> - vmxnet3_tq_destroy(&adapter->tx_queue, adapter);
> - vmxnet3_rq_destroy(&adapter->rx_queue, adapter);
> + vmxnet3_tq_destroy_all(adapter);
> + vmxnet3_rq_destroy_all(adapter);
>
> err = vmxnet3_create_queues(adapter, new_tx_ring_size,
> new_rx_ring_size, VMXNET3_DEF_RX_RING_SIZE);
> +
> if (err) {
> /* failed, most likely because of OOM, try default
> * size */
> @@ -537,6 +542,59 @@ out:
> }
>
>
> +static int
> +vmxnet3_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *info,
> + void *rules)
> +{
> + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
> + switch (info->cmd) {
> + case ETHTOOL_GRXRINGS:
> + info->data = adapter->num_rx_queues;
> + return 0;
> + }
> + return -EOPNOTSUPP;
> +}
> +
> +
> +static int
> +vmxnet3_get_rss_indir(struct net_device *netdev,
> + struct ethtool_rxfh_indir *p)
> +{
> + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
> + struct UPT1_RSSConf *rssConf = adapter->rss_conf;
> + unsigned int n = min_t(unsigned int, p->size, rssConf->indTableSize);
> +
> + p->size = rssConf->indTableSize;
> + while (n--)
> + p->ring_index[n] = rssConf->indTable[n];
> + return 0;
> +
> +}
> +
> +static int
> +vmxnet3_set_rss_indir(struct net_device *netdev,
> + const struct ethtool_rxfh_indir *p)
> +{
> + unsigned int i;
> + struct vmxnet3_adapter *adapter = netdev_priv(netdev);
> + struct UPT1_RSSConf *rssConf = adapter->rss_conf;
> +
> + if (p->size != rssConf->indTableSize)
> + return -EINVAL;
> + for (i = 0; i < rssConf->indTableSize; i++) {
> + if (p->ring_index[i] >= 0 && p->ring_index[i] <
> + adapter->num_rx_queues)
> + rssConf->indTable[i] = p->ring_index[i];
> + else
> + rssConf->indTable[i] = i % adapter->num_rx_queues;
> + }
> + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
> + VMXNET3_CMD_UPDATE_RSSIDT);
> +
> + return 0;
> +
> +}
> +
> static struct ethtool_ops vmxnet3_ethtool_ops = {
> .get_settings = vmxnet3_get_settings,
> .get_drvinfo = vmxnet3_get_drvinfo,
> @@ -560,6 +618,9 @@ static struct ethtool_ops vmxnet3_ethtool_ops = {
> .get_ethtool_stats = vmxnet3_get_ethtool_stats,
> .get_ringparam = vmxnet3_get_ringparam,
> .set_ringparam = vmxnet3_set_ringparam,
> + .get_rxnfc = vmxnet3_get_rxnfc,
> + .get_rxfh_indir = vmxnet3_get_rss_indir,
> + .set_rxfh_indir = vmxnet3_set_rss_indir,
> };
>
> void vmxnet3_set_ethtool_ops(struct net_device *netdev)
> diff --git a/drivers/net/vmxnet3/vmxnet3_int.h b/drivers/net/vmxnet3/vmxnet3_int.h
> index c88ea5c..2332b1f 100644
> --- a/drivers/net/vmxnet3/vmxnet3_int.h
> +++ b/drivers/net/vmxnet3/vmxnet3_int.h
> @@ -68,11 +68,15 @@
> /*
> * Version numbers
> */
> -#define VMXNET3_DRIVER_VERSION_STRING "1.0.14.0-k"
> +#define VMXNET3_DRIVER_VERSION_STRING "1.0.16.0-k"
>
> /* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
> -#define VMXNET3_DRIVER_VERSION_NUM 0x01000E00
> +#define VMXNET3_DRIVER_VERSION_NUM 0x01001000
>
> +#if defined(CONFIG_PCI_MSI)
> + /* RSS only makes sense if MSI-X is supported. */
> + #define VMXNET3_RSS
> +#endif
>
> /*
> * Capabilities
> @@ -218,16 +222,19 @@ struct vmxnet3_tx_ctx {
> };
>
> struct vmxnet3_tx_queue {
> + char name[IFNAMSIZ+8]; /* To identify interrupt */
> + struct vmxnet3_adapter *adapter;
> spinlock_t tx_lock;
> struct vmxnet3_cmd_ring tx_ring;
> - struct vmxnet3_tx_buf_info *buf_info;
> + struct vmxnet3_tx_buf_info *buf_info;
> struct vmxnet3_tx_data_ring data_ring;
> struct vmxnet3_comp_ring comp_ring;
> - struct Vmxnet3_TxQueueCtrl *shared;
> + struct Vmxnet3_TxQueueCtrl *shared;
> struct vmxnet3_tq_driver_stats stats;
> bool stopped;
> int num_stop; /* # of times the queue is
> * stopped */
> + int qid;
> } __attribute__((__aligned__(SMP_CACHE_BYTES)));
>
> enum vmxnet3_rx_buf_type {
> @@ -259,6 +266,9 @@ struct vmxnet3_rq_driver_stats {
> };
>
> struct vmxnet3_rx_queue {
> + char name[IFNAMSIZ + 8]; /* To identify interrupt */
> + struct vmxnet3_adapter *adapter;
> + struct napi_struct napi;
> struct vmxnet3_cmd_ring rx_ring[2];
> struct vmxnet3_comp_ring comp_ring;
> struct vmxnet3_rx_ctx rx_ctx;
> @@ -271,7 +281,16 @@ struct vmxnet3_rx_queue {
> struct vmxnet3_rq_driver_stats stats;
> } __attribute__((__aligned__(SMP_CACHE_BYTES)));
>
> -#define VMXNET3_LINUX_MAX_MSIX_VECT 1
> +#define VMXNET3_DEVICE_MAX_TX_QUEUES 8
> +#define VMXNET3_DEVICE_MAX_RX_QUEUES 8 /* Keep this value as a power of 2 */
> +
> +/* Should be less than UPT1_RSS_MAX_IND_TABLE_SIZE */
> +#define VMXNET3_RSS_IND_TABLE_SIZE (VMXNET3_DEVICE_MAX_RX_QUEUES * 4)
> +
> +#define VMXNET3_LINUX_MAX_MSIX_VECT (VMXNET3_DEVICE_MAX_TX_QUEUES + \
> + VMXNET3_DEVICE_MAX_RX_QUEUES + 1)
> +#define VMXNET3_LINUX_MIN_MSIX_VECT 3 /* 1 for each : tx, rx and event */
> +
>
> struct vmxnet3_intr {
> enum vmxnet3_intr_mask_mode mask_mode;
> @@ -279,28 +298,32 @@ struct vmxnet3_intr {
> u8 num_intrs; /* # of intr vectors */
> u8 event_intr_idx; /* idx of the intr vector for event */
> u8 mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */
> + char event_msi_vector_name[IFNAMSIZ+11];
> #ifdef CONFIG_PCI_MSI
> struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT];
> #endif
> };
>
> +/* Interrupt sharing schemes, share_intr */
> +#define VMXNET3_INTR_DONTSHARE 0 /* each queue has its own irq */
> +#define VMXNET3_INTR_TXSHARE 1 /* All tx queues share one irq */
> +#define VMXNET3_INTR_BUDDYSHARE 2 /* Corresponding tx,rx queues share irq */
> +
> #define VMXNET3_STATE_BIT_RESETTING 0
> #define VMXNET3_STATE_BIT_QUIESCED 1
> -struct vmxnet3_adapter {
> - struct vmxnet3_tx_queue tx_queue;
> - struct vmxnet3_rx_queue rx_queue;
> - struct napi_struct napi;
> - struct vlan_group *vlan_grp;
> -
> - struct vmxnet3_intr intr;
> -
> - struct Vmxnet3_DriverShared *shared;
> - struct Vmxnet3_PMConf *pm_conf;
> - struct Vmxnet3_TxQueueDesc *tqd_start; /* first tx queue desc */
> - struct Vmxnet3_RxQueueDesc *rqd_start; /* first rx queue desc */
> - struct net_device *netdev;
> - struct pci_dev *pdev;
>
> +struct vmxnet3_adapter {
> + struct vmxnet3_tx_queue tx_queue[VMXNET3_DEVICE_MAX_TX_QUEUES];
> + struct vmxnet3_rx_queue rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES];
> + struct vlan_group *vlan_grp;
> + struct vmxnet3_intr intr;
> + struct Vmxnet3_DriverShared *shared;
> + struct Vmxnet3_PMConf *pm_conf;
> + struct Vmxnet3_TxQueueDesc *tqd_start; /* all tx queue desc */
> + struct Vmxnet3_RxQueueDesc *rqd_start; /* all rx queue desc */
> + struct net_device *netdev;
> + struct net_device_stats net_stats;
> + struct pci_dev *pdev;
> u8 *hw_addr0; /* for BAR 0 */
> u8 *hw_addr1; /* for BAR 1 */
>
> @@ -308,6 +331,12 @@ struct vmxnet3_adapter {
> bool rxcsum;
> bool lro;
> bool jumbo_frame;
> +#ifdef VMXNET3_RSS
> + struct UPT1_RSSConf *rss_conf;
> + bool rss;
> +#endif
> + u32 num_rx_queues;
> + u32 num_tx_queues;
>
> /* rx buffer related */
> unsigned skb_buf_size;
> @@ -327,6 +356,7 @@ struct vmxnet3_adapter {
> unsigned long state; /* VMXNET3_STATE_BIT_xxx */
>
> int dev_number;
> + int share_intr;
> };
>
> #define VMXNET3_WRITE_BAR0_REG(adapter, reg, val) \
> @@ -381,12 +411,10 @@ void
> vmxnet3_reset_dev(struct vmxnet3_adapter *adapter);
>
> void
> -vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
> - struct vmxnet3_adapter *adapter);
> +vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter);
>
> void
> -vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
> - struct vmxnet3_adapter *adapter);
> +vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter);
>
> int
> vmxnet3_create_queues(struct vmxnet3_adapter *adapter,
>


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  Last update: 2010-11-10 23:41    [from the cache]
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