/*
- * Copyright (C) 2015 Netronome Systems, Inc.
+ * Copyright (C) 2015-2017 Netronome Systems, Inc.
*
* This software is dual licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
}
/**
- * nfp_net_msix_alloc() - Try to allocate MSI-X irqs
- * @nn: NFP Network structure
- * @nr_vecs: Number of MSI-X vectors to allocate
- *
- * For MSI-X we want at least NFP_NET_NON_Q_VECTORS + 1 vectors.
+ * nfp_net_irqs_alloc() - allocates MSI-X irqs
+ * @pdev: PCI device structure
+ * @irq_entries: Array to be initialized and used to hold the irq entries
+ * @min_irqs: Minimal acceptable number of interrupts
+ * @wanted_irqs: Target number of interrupts to allocate
*
- * Return: Number of MSI-X vectors obtained or 0 on error.
+ * Return: Number of irqs obtained or 0 on error.
*/
-static int nfp_net_msix_alloc(struct nfp_net *nn, int nr_vecs)
+unsigned int
+nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries,
+ unsigned int min_irqs, unsigned int wanted_irqs)
{
- struct pci_dev *pdev = nn->pdev;
- int nvecs;
- int i;
+ unsigned int i;
+ int got_irqs;
- for (i = 0; i < nr_vecs; i++)
- nn->irq_entries[i].entry = i;
+ for (i = 0; i < wanted_irqs; i++)
+ irq_entries[i].entry = i;
- nvecs = pci_enable_msix_range(pdev, nn->irq_entries,
- NFP_NET_NON_Q_VECTORS + 1, nr_vecs);
- if (nvecs < 0) {
- nn_warn(nn, "Failed to enable MSI-X. Wanted %d-%d (err=%d)\n",
- NFP_NET_NON_Q_VECTORS + 1, nr_vecs, nvecs);
+ got_irqs = pci_enable_msix_range(pdev, irq_entries,
+ min_irqs, wanted_irqs);
+ if (got_irqs < 0) {
+ dev_err(&pdev->dev, "Failed to enable %d-%d MSI-X (err=%d)\n",
+ min_irqs, wanted_irqs, got_irqs);
return 0;
}
- return nvecs;
+ if (got_irqs < wanted_irqs)
+ dev_warn(&pdev->dev, "Unable to allocate %d IRQs got only %d\n",
+ wanted_irqs, got_irqs);
+
+ return got_irqs;
}
/**
- * nfp_net_irqs_alloc() - allocates MSI-X irqs
- * @nn: NFP Network structure
+ * nfp_net_irqs_assign() - Assign interrupts allocated externally to netdev
+ * @nn: NFP Network structure
+ * @irq_entries: Table of allocated interrupts
+ * @n: Size of @irq_entries (number of entries to grab)
*
- * Return: Number of irqs obtained or 0 on error.
+ * After interrupts are allocated with nfp_net_irqs_alloc() this function
+ * should be called to assign them to a specific netdev (port).
*/
-int nfp_net_irqs_alloc(struct nfp_net *nn)
+void
+nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries,
+ unsigned int n)
{
- int wanted_irqs;
- unsigned int n;
-
- wanted_irqs = nn->num_r_vecs + NFP_NET_NON_Q_VECTORS;
-
- n = nfp_net_msix_alloc(nn, wanted_irqs);
- if (n == 0) {
- nn_err(nn, "Failed to allocate MSI-X IRQs\n");
- return 0;
- }
-
nn->max_r_vecs = n - NFP_NET_NON_Q_VECTORS;
nn->num_r_vecs = nn->max_r_vecs;
- if (n < wanted_irqs)
- nn_warn(nn, "Unable to allocate %d vectors. Got %d instead\n",
- wanted_irqs, n);
+ memcpy(nn->irq_entries, irq_entries, sizeof(*irq_entries) * n);
- return n;
+ if (nn->num_rx_rings > nn->num_r_vecs ||
+ nn->num_tx_rings > nn->num_r_vecs)
+ nn_warn(nn, "More rings (%d,%d) than vectors (%d).\n",
+ nn->num_rx_rings, nn->num_tx_rings, nn->num_r_vecs);
+
+ nn->num_rx_rings = min(nn->num_r_vecs, nn->num_rx_rings);
+ nn->num_tx_rings = min(nn->num_r_vecs, nn->num_tx_rings);
+ nn->num_stack_tx_rings = nn->num_tx_rings;
}
/**
* nfp_net_irqs_disable() - Disable interrupts
- * @nn: NFP Network structure
+ * @pdev: PCI device structure
*
* Undoes what @nfp_net_irqs_alloc() does.
*/
-void nfp_net_irqs_disable(struct nfp_net *nn)
+void nfp_net_irqs_disable(struct pci_dev *pdev)
{
- pci_disable_msix(nn->pdev);
+ pci_disable_msix(pdev);
}
/**
static irqreturn_t nfp_net_irq_lsc(int irq, void *data)
{
struct nfp_net *nn = data;
+ struct msix_entry *entry;
+
+ entry = &nn->irq_entries[NFP_NET_IRQ_LSC_IDX];
nfp_net_read_link_status(nn);
- nfp_net_irq_unmask(nn, NFP_NET_IRQ_LSC_IDX);
+ nfp_net_irq_unmask(nn, entry->entry);
return IRQ_HANDLED;
}
}
/**
- * nfp_net_irqs_assign() - Assign IRQs and setup rvecs.
+ * nfp_net_vecs_init() - Assign IRQs and setup rvecs.
* @netdev: netdev structure
*/
-static void nfp_net_irqs_assign(struct net_device *netdev)
+static void nfp_net_vecs_init(struct net_device *netdev)
{
struct nfp_net *nn = netdev_priv(netdev);
struct nfp_net_r_vector *r_vec;
int r;
- if (nn->num_rx_rings > nn->num_r_vecs ||
- nn->num_tx_rings > nn->num_r_vecs)
- nn_warn(nn, "More rings (%d,%d) than vectors (%d).\n",
- nn->num_rx_rings, nn->num_tx_rings, nn->num_r_vecs);
-
- nn->num_rx_rings = min(nn->num_r_vecs, nn->num_rx_rings);
- nn->num_tx_rings = min(nn->num_r_vecs, nn->num_tx_rings);
- nn->num_stack_tx_rings = nn->num_tx_rings;
-
nn->lsc_handler = nfp_net_irq_lsc;
nn->exn_handler = nfp_net_irq_exn;
for (r = 0; r < nn->max_r_vecs; r++) {
+ struct msix_entry *entry;
+
+ entry = &nn->irq_entries[NFP_NET_NON_Q_VECTORS + r];
+
r_vec = &nn->r_vecs[r];
r_vec->nfp_net = nn;
r_vec->handler = nfp_net_irq_rxtx;
- r_vec->irq_idx = NFP_NET_NON_Q_VECTORS + r;
+ r_vec->irq_entry = entry->entry;
+ r_vec->irq_vector = entry->vector;
cpumask_set_cpu(r, &r_vec->affinity_mask);
}
entry->vector, err);
return err;
}
- nn_writeb(nn, ctrl_offset, vector_idx);
+ nn_writeb(nn, ctrl_offset, entry->entry);
return 0;
}
if (pkts_polled < budget) {
napi_complete_done(napi, pkts_polled);
- nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_idx);
+ nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_entry);
}
return pkts_polled;
nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
int idx)
{
- struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx];
int err;
/* Setup NAPI */
snprintf(r_vec->name, sizeof(r_vec->name),
"%s-rxtx-%d", nn->netdev->name, idx);
- err = request_irq(entry->vector, r_vec->handler, 0, r_vec->name, r_vec);
+ err = request_irq(r_vec->irq_vector, r_vec->handler, 0, r_vec->name,
+ r_vec);
if (err) {
netif_napi_del(&r_vec->napi);
- nn_err(nn, "Error requesting IRQ %d\n", entry->vector);
+ nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector);
return err;
}
- disable_irq(entry->vector);
+ disable_irq(r_vec->irq_vector);
- irq_set_affinity_hint(entry->vector, &r_vec->affinity_mask);
+ irq_set_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask);
- nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, entry->vector, entry->entry);
+ nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, r_vec->irq_vector,
+ r_vec->irq_entry);
return 0;
}
static void
nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec)
{
- struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx];
-
- irq_set_affinity_hint(entry->vector, NULL);
+ irq_set_affinity_hint(r_vec->irq_vector, NULL);
netif_napi_del(&r_vec->napi);
- free_irq(entry->vector, r_vec);
+ free_irq(r_vec->irq_vector, r_vec);
}
/**
/* Write the DMA address, size and MSI-X info to the device */
nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), rx_ring->dma);
nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), ilog2(rx_ring->cnt));
- nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), rx_ring->r_vec->irq_idx);
+ nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), rx_ring->r_vec->irq_entry);
}
static void
{
nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), tx_ring->dma);
nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), ilog2(tx_ring->cnt));
- nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), tx_ring->r_vec->irq_idx);
+ nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), tx_ring->r_vec->irq_entry);
}
static int __nfp_net_set_config_and_enable(struct nfp_net *nn)
for (r = 0; r < nn->num_r_vecs; r++) {
napi_enable(&nn->r_vecs[r].napi);
- enable_irq(nn->irq_entries[nn->r_vecs[r].irq_idx].vector);
+ enable_irq(nn->r_vecs[r].irq_vector);
}
netif_tx_wake_all_queues(nn->netdev);
nn->link_up = false;
for (r = 0; r < nn->num_r_vecs; r++) {
- disable_irq(nn->irq_entries[nn->r_vecs[r].irq_idx].vector);
+ disable_irq(nn->r_vecs[r].irq_vector);
napi_disable(&nn->r_vecs[r].napi);
}
netif_carrier_off(netdev);
nfp_net_set_ethtool_ops(netdev);
- nfp_net_irqs_assign(netdev);
+ nfp_net_vecs_init(netdev);
return register_netdev(netdev);
}
#include "nfp_net_ctrl.h"
#include "nfp_net.h"
+#include "nfp_main.h"
+
+/**
+ * struct nfp_net_vf - NFP VF-specific device structure
+ * @nn: NFP Net structure for this device
+ * @irq_entries: Pre-allocated array of MSI-X entries
+ * @q_bar: Pointer to mapped QC memory (NULL if TX/RX mapped directly)
+ * @ddir: Per-device debugfs directory
+ */
+struct nfp_net_vf {
+ struct nfp_net *nn;
+
+ struct msix_entry irq_entries[NFP_NET_NON_Q_VECTORS +
+ NFP_NET_MAX_TX_RINGS];
+ u8 __iomem *q_bar;
+
+ struct dentry *ddir;
+};
static const char nfp_net_driver_name[] = "nfp_netvf";
u32 tx_bar_off, rx_bar_off;
u32 tx_bar_sz, rx_bar_sz;
int tx_bar_no, rx_bar_no;
+ struct nfp_net_vf *vf;
+ unsigned int num_irqs;
u8 __iomem *ctrl_bar;
- struct dentry *ddir;
struct nfp_net *nn;
u32 startq;
int stride;
int err;
+ vf = kzalloc(sizeof(*vf), GFP_KERNEL);
+ if (!vf)
+ return -ENOMEM;
+ pci_set_drvdata(pdev, vf);
+
err = pci_enable_device_mem(pdev);
if (err)
- return err;
+ goto err_free_vf;
err = pci_request_regions(pdev, nfp_net_driver_name);
if (err) {
err = PTR_ERR(nn);
goto err_ctrl_unmap;
}
+ vf->nn = nn;
nn->fw_ver = fw_ver;
nn->ctrl_bar = ctrl_bar;
bar_sz = (rx_bar_off + rx_bar_sz) - bar_off;
map_addr = pci_resource_start(pdev, tx_bar_no) + bar_off;
- nn->q_bar = ioremap_nocache(map_addr, bar_sz);
- if (!nn->q_bar) {
+ vf->q_bar = ioremap_nocache(map_addr, bar_sz);
+ if (!vf->q_bar) {
nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
err = -EIO;
goto err_netdev_free;
}
/* TX queues */
- nn->tx_bar = nn->q_bar + (tx_bar_off - bar_off);
+ nn->tx_bar = vf->q_bar + (tx_bar_off - bar_off);
/* RX queues */
- nn->rx_bar = nn->q_bar + (rx_bar_off - bar_off);
+ nn->rx_bar = vf->q_bar + (rx_bar_off - bar_off);
} else {
resource_size_t map_addr;
nfp_netvf_get_mac_addr(nn);
- err = nfp_net_irqs_alloc(nn);
- if (!err) {
+ num_irqs = nfp_net_irqs_alloc(pdev, vf->irq_entries,
+ NFP_NET_MIN_PORT_IRQS,
+ NFP_NET_NON_Q_VECTORS + nn->num_r_vecs);
+ if (!num_irqs) {
nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n");
err = -EIO;
goto err_unmap_rx;
}
+ nfp_net_irqs_assign(nn, vf->irq_entries, num_irqs);
/* Get ME clock frequency from ctrl BAR
* XXX for now frequency is hardcoded until we figure out how
if (err)
goto err_irqs_disable;
- pci_set_drvdata(pdev, nn);
-
nfp_net_info(nn);
- ddir = nfp_net_debugfs_device_add(pdev);
- nfp_net_debugfs_port_add(nn, ddir, 0);
- nn->debugfs_dir = ddir;
+ vf->ddir = nfp_net_debugfs_device_add(pdev);
+ nfp_net_debugfs_port_add(nn, vf->ddir, 0);
return 0;
err_irqs_disable:
- nfp_net_irqs_disable(nn);
+ nfp_net_irqs_disable(pdev);
err_unmap_rx:
- if (!nn->q_bar)
+ if (!vf->q_bar)
iounmap(nn->rx_bar);
err_unmap_tx:
- if (!nn->q_bar)
+ if (!vf->q_bar)
iounmap(nn->tx_bar);
else
- iounmap(nn->q_bar);
+ iounmap(vf->q_bar);
err_netdev_free:
- pci_set_drvdata(pdev, NULL);
nfp_net_netdev_free(nn);
err_ctrl_unmap:
iounmap(ctrl_bar);
pci_release_regions(pdev);
err_pci_disable:
pci_disable_device(pdev);
+err_free_vf:
+ pci_set_drvdata(pdev, NULL);
+ kfree(vf);
return err;
}
static void nfp_netvf_pci_remove(struct pci_dev *pdev)
{
- struct nfp_net *nn = pci_get_drvdata(pdev);
+ struct nfp_net_vf *vf = pci_get_drvdata(pdev);
+ struct nfp_net *nn = vf->nn;
/* Note, the order is slightly different from above as we need
* to keep the nn pointer around till we have freed everything.
*/
nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
+ nfp_net_debugfs_dir_clean(&vf->ddir);
nfp_net_netdev_clean(nn->netdev);
- nfp_net_irqs_disable(nn);
+ nfp_net_irqs_disable(pdev);
- if (!nn->q_bar) {
+ if (!vf->q_bar) {
iounmap(nn->rx_bar);
iounmap(nn->tx_bar);
} else {
- iounmap(nn->q_bar);
+ iounmap(vf->q_bar);
}
iounmap(nn->ctrl_bar);
- pci_set_drvdata(pdev, NULL);
-
nfp_net_netdev_free(nn);
pci_release_regions(pdev);
pci_disable_device(pdev);
+
+ pci_set_drvdata(pdev, NULL);
+ kfree(vf);
}
struct pci_driver nfp_netvf_pci_driver = {
projects / users / hch / configfs.git / commitdiff