NTB driver bug fixes to address issues in list traversal, skb leak in
ntb_netdev, a typo, and a leak of msix entries in the error path. Clean ups of the event handling logic, as well as a overall style cleanup. Finally, the driver was converted to use the new pci_enable_msix_range logic (and the refactoring to go along with it). -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) iQIcBAABAgAGBQJTQxbAAAoJEG5mS6x6i9Ijq7oP/0pYUCGKYv3ElQuyatPnDI8q rSi93Q7WVYpv92y+uhal/TldVR5LvKKnPBf700TwUpj752X1XhlcFCw2TE9kHH1c VRicAZypLl4+5ob5QhFD7mRl+gEbq3JHLwSPffM26V5dm3mMqm24PRQPm9RN2uzO MRL/WEgShGM1pJQhIx+Ti+35/PxV67dw/rysvoUtPIuB8DfoIU7UBYEJ9BrzfyCP AXSjJmrR92ES/HX4w1kcXl+FA6sF/UR/YmnAW9uO6YDhxiIs1RNpiqJEJUettOHI 7SxF4tFv8Pi5Heuf4ASflF1bPOFOLUt698W3+JMWaD0bLgF5IDI9hTvtbfOhy7Ag zqsRCipZ3dVJ8EE012IA978rjqbr8qrHfQK2jnD0JALWf/t8RHBzo3IjfRu+c6W+ aRlkqu2BxZO0V3tFLoJ7uQrjp23hrERjRJi8s5hjOqwMwgB3SlVsaMVJDkeuR/46 diQTkxjylhlQgdJb6xlSiM948wfcMt5pIFxWQppHFk8ouCOX1+q9u4cEipU+nvT+ dcnc5mqERqMMjsHke3uzsHtG8OlPbbtHjzCKXT1/7NPhUn2x84AsOEkiX+qas5nK sabgOWZtawz1Nl3x+gKR6OBGtXDdLlj7JTsqphPa3mr3RBqx8v8VVYYtqHVCiy8N mtc/701fHOKdrBtk54Wb =vDei -----END PGP SIGNATURE----- Merge tag 'ntb-3.15' of git://github.com/jonmason/ntb Pull PCIe non-transparent bridge fixes and features from Jon Mason: "NTB driver bug fixes to address issues in list traversal, skb leak in ntb_netdev, a typo, and a leak of msix entries in the error path. Clean ups of the event handling logic, as well as a overall style cleanup. Finally, the driver was converted to use the new pci_enable_msix_range logic (and the refactoring to go along with it)" * tag 'ntb-3.15' of git://github.com/jonmason/ntb: ntb: Use pci_enable_msix_range() instead of pci_enable_msix() ntb: Split ntb_setup_msix() into separate BWD/SNB routines ntb: Use pci_msix_vec_count() to obtain number of MSI-Xs NTB: Code Style Clean-up NTB: client event cleanup ntb: Fix leakage of ntb_device::msix_entries[] array NTB: Fix typo in setting one translation register ntb_netdev: Fix skb free issue in open ntb_netdev: Fix list_for_each_entry exit issue
This commit is contained in:
commit
07f5fef981
|
@ -78,11 +78,19 @@ static void ntb_netdev_event_handler(void *data, int status)
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netdev_dbg(ndev, "Event %x, Link %x\n", status,
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ntb_transport_link_query(dev->qp));
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/* Currently, only link status event is supported */
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if (status)
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netif_carrier_on(ndev);
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else
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switch (status) {
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case NTB_LINK_DOWN:
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netif_carrier_off(ndev);
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break;
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case NTB_LINK_UP:
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if (!ntb_transport_link_query(dev->qp))
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return;
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netif_carrier_on(ndev);
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break;
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default:
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netdev_warn(ndev, "Unsupported event type %d\n", status);
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}
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}
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static void ntb_netdev_rx_handler(struct ntb_transport_qp *qp, void *qp_data,
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@ -182,8 +190,10 @@ static int ntb_netdev_open(struct net_device *ndev)
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rc = ntb_transport_rx_enqueue(dev->qp, skb, skb->data,
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ndev->mtu + ETH_HLEN);
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if (rc == -EINVAL)
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if (rc == -EINVAL) {
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dev_kfree_skb(skb);
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goto err;
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}
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}
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netif_carrier_off(ndev);
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@ -367,12 +377,15 @@ static void ntb_netdev_remove(struct pci_dev *pdev)
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{
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struct net_device *ndev;
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struct ntb_netdev *dev;
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bool found = false;
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list_for_each_entry(dev, &dev_list, list) {
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if (dev->pdev == pdev)
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if (dev->pdev == pdev) {
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found = true;
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break;
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}
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}
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if (dev == NULL)
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if (!found)
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return;
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list_del(&dev->list);
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|
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@ -91,7 +91,7 @@ static struct dentry *debugfs_dir;
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/* Translate memory window 0,1 to BAR 2,4 */
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#define MW_TO_BAR(mw) (mw * NTB_MAX_NUM_MW + 2)
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static DEFINE_PCI_DEVICE_TABLE(ntb_pci_tbl) = {
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static const struct pci_device_id ntb_pci_tbl[] = {
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{PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_BWD)},
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{PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_JSF)},
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{PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_SNB)},
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@ -120,7 +120,8 @@ MODULE_DEVICE_TABLE(pci, ntb_pci_tbl);
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* RETURNS: An appropriate -ERRNO error value on error, or zero for success.
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*/
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int ntb_register_event_callback(struct ntb_device *ndev,
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void (*func)(void *handle, enum ntb_hw_event event))
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void (*func)(void *handle,
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enum ntb_hw_event event))
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{
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if (ndev->event_cb)
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return -EINVAL;
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@ -715,9 +716,9 @@ static int ntb_xeon_setup(struct ntb_device *ndev)
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SNB_PBAR4LMT_OFFSET);
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/* HW errata on the Limit registers. They can only be
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* written when the base register is 4GB aligned and
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* < 32bit. This should already be the case based on the
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* driver defaults, but write the Limit registers first
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* just in case.
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* < 32bit. This should already be the case based on
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* the driver defaults, but write the Limit registers
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* first just in case.
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*/
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} else {
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ndev->limits.max_mw = SNB_MAX_MW;
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@ -739,9 +740,9 @@ static int ntb_xeon_setup(struct ntb_device *ndev)
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writeq(0, ndev->reg_base + SNB_PBAR4LMT_OFFSET);
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/* HW errata on the Limit registers. They can only be
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* written when the base register is 4GB aligned and
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* < 32bit. This should already be the case based on the
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* driver defaults, but write the Limit registers first
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* just in case.
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* < 32bit. This should already be the case based on
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* the driver defaults, but write the Limit registers
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* first just in case.
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*/
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}
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|
@ -785,7 +786,7 @@ static int ntb_xeon_setup(struct ntb_device *ndev)
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/* B2B_XLAT_OFFSET is a 64bit register, but can
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* only take 32bit writes
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*/
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writel(SNB_MBAR01_DSD_ADDR & 0xffffffff,
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writel(SNB_MBAR01_USD_ADDR & 0xffffffff,
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ndev->reg_base + SNB_B2B_XLAT_OFFSETL);
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writel(SNB_MBAR01_USD_ADDR >> 32,
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ndev->reg_base + SNB_B2B_XLAT_OFFSETU);
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|
@ -803,7 +804,7 @@ static int ntb_xeon_setup(struct ntb_device *ndev)
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ndev->conn_type = NTB_CONN_RP;
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if (xeon_errata_workaround) {
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dev_err(&ndev->pdev->dev,
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dev_err(&ndev->pdev->dev,
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"NTB-RP disabled due to hardware errata. To disregard this warning and potentially lock-up the system, add the parameter 'xeon_errata_workaround=0'.\n");
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return -EINVAL;
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}
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|
@ -1079,25 +1080,104 @@ static irqreturn_t ntb_interrupt(int irq, void *dev)
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return IRQ_HANDLED;
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}
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static int ntb_setup_msix(struct ntb_device *ndev)
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static int ntb_setup_snb_msix(struct ntb_device *ndev, int msix_entries)
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{
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struct pci_dev *pdev = ndev->pdev;
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struct msix_entry *msix;
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int msix_entries;
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int rc, i;
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u16 val;
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if (!pdev->msix_cap) {
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rc = -EIO;
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goto err;
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if (msix_entries < ndev->limits.msix_cnt)
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return -ENOSPC;
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rc = pci_enable_msix_exact(pdev, ndev->msix_entries, msix_entries);
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if (rc < 0)
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return rc;
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for (i = 0; i < msix_entries; i++) {
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msix = &ndev->msix_entries[i];
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WARN_ON(!msix->vector);
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if (i == msix_entries - 1) {
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rc = request_irq(msix->vector,
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xeon_event_msix_irq, 0,
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"ntb-event-msix", ndev);
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if (rc)
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goto err;
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} else {
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rc = request_irq(msix->vector,
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xeon_callback_msix_irq, 0,
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"ntb-callback-msix",
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&ndev->db_cb[i]);
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if (rc)
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goto err;
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}
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}
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rc = pci_read_config_word(pdev, pdev->msix_cap + PCI_MSIX_FLAGS, &val);
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if (rc)
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goto err;
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ndev->num_msix = msix_entries;
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ndev->max_cbs = msix_entries - 1;
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msix_entries = msix_table_size(val);
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if (msix_entries > ndev->limits.msix_cnt) {
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return 0;
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err:
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while (--i >= 0) {
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/* Code never reaches here for entry nr 'ndev->num_msix - 1' */
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msix = &ndev->msix_entries[i];
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free_irq(msix->vector, &ndev->db_cb[i]);
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}
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pci_disable_msix(pdev);
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ndev->num_msix = 0;
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return rc;
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}
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static int ntb_setup_bwd_msix(struct ntb_device *ndev, int msix_entries)
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{
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struct pci_dev *pdev = ndev->pdev;
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struct msix_entry *msix;
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int rc, i;
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msix_entries = pci_enable_msix_range(pdev, ndev->msix_entries,
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1, msix_entries);
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if (msix_entries < 0)
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return msix_entries;
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for (i = 0; i < msix_entries; i++) {
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msix = &ndev->msix_entries[i];
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WARN_ON(!msix->vector);
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rc = request_irq(msix->vector, bwd_callback_msix_irq, 0,
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"ntb-callback-msix", &ndev->db_cb[i]);
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if (rc)
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goto err;
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}
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ndev->num_msix = msix_entries;
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ndev->max_cbs = msix_entries;
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|
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return 0;
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err:
|
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while (--i >= 0)
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free_irq(msix->vector, &ndev->db_cb[i]);
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||||
|
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pci_disable_msix(pdev);
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ndev->num_msix = 0;
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return rc;
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||||
}
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|
||||
static int ntb_setup_msix(struct ntb_device *ndev)
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{
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||||
struct pci_dev *pdev = ndev->pdev;
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int msix_entries;
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int rc, i;
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||||
|
||||
msix_entries = pci_msix_vec_count(pdev);
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if (msix_entries < 0) {
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rc = msix_entries;
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||||
goto err;
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||||
} else if (msix_entries > ndev->limits.msix_cnt) {
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rc = -EINVAL;
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||||
goto err;
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||||
}
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||||
|
@ -1112,78 +1192,19 @@ static int ntb_setup_msix(struct ntb_device *ndev)
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|||
for (i = 0; i < msix_entries; i++)
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||||
ndev->msix_entries[i].entry = i;
|
||||
|
||||
rc = pci_enable_msix(pdev, ndev->msix_entries, msix_entries);
|
||||
if (rc < 0)
|
||||
goto err1;
|
||||
if (rc > 0) {
|
||||
/* On SNB, the link interrupt is always tied to 4th vector. If
|
||||
* we can't get all 4, then we can't use MSI-X.
|
||||
*/
|
||||
if (ndev->hw_type != BWD_HW) {
|
||||
rc = -EIO;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
dev_warn(&pdev->dev,
|
||||
"Only %d MSI-X vectors. Limiting the number of queues to that number.\n",
|
||||
rc);
|
||||
msix_entries = rc;
|
||||
|
||||
rc = pci_enable_msix(pdev, ndev->msix_entries, msix_entries);
|
||||
if (rc)
|
||||
goto err1;
|
||||
}
|
||||
|
||||
for (i = 0; i < msix_entries; i++) {
|
||||
msix = &ndev->msix_entries[i];
|
||||
WARN_ON(!msix->vector);
|
||||
|
||||
/* Use the last MSI-X vector for Link status */
|
||||
if (ndev->hw_type == BWD_HW) {
|
||||
rc = request_irq(msix->vector, bwd_callback_msix_irq, 0,
|
||||
"ntb-callback-msix", &ndev->db_cb[i]);
|
||||
if (rc)
|
||||
goto err2;
|
||||
} else {
|
||||
if (i == msix_entries - 1) {
|
||||
rc = request_irq(msix->vector,
|
||||
xeon_event_msix_irq, 0,
|
||||
"ntb-event-msix", ndev);
|
||||
if (rc)
|
||||
goto err2;
|
||||
} else {
|
||||
rc = request_irq(msix->vector,
|
||||
xeon_callback_msix_irq, 0,
|
||||
"ntb-callback-msix",
|
||||
&ndev->db_cb[i]);
|
||||
if (rc)
|
||||
goto err2;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ndev->num_msix = msix_entries;
|
||||
if (ndev->hw_type == BWD_HW)
|
||||
ndev->max_cbs = msix_entries;
|
||||
rc = ntb_setup_bwd_msix(ndev, msix_entries);
|
||||
else
|
||||
ndev->max_cbs = msix_entries - 1;
|
||||
rc = ntb_setup_snb_msix(ndev, msix_entries);
|
||||
if (rc)
|
||||
goto err1;
|
||||
|
||||
return 0;
|
||||
|
||||
err2:
|
||||
while (--i >= 0) {
|
||||
msix = &ndev->msix_entries[i];
|
||||
if (ndev->hw_type != BWD_HW && i == ndev->num_msix - 1)
|
||||
free_irq(msix->vector, ndev);
|
||||
else
|
||||
free_irq(msix->vector, &ndev->db_cb[i]);
|
||||
}
|
||||
pci_disable_msix(pdev);
|
||||
err1:
|
||||
kfree(ndev->msix_entries);
|
||||
dev_err(&pdev->dev, "Error allocating MSI-X interrupt\n");
|
||||
err:
|
||||
ndev->num_msix = 0;
|
||||
dev_err(&pdev->dev, "Error allocating MSI-X interrupt\n");
|
||||
return rc;
|
||||
}
|
||||
|
||||
|
@ -1281,6 +1302,7 @@ static void ntb_free_interrupts(struct ntb_device *ndev)
|
|||
free_irq(msix->vector, &ndev->db_cb[i]);
|
||||
}
|
||||
pci_disable_msix(pdev);
|
||||
kfree(ndev->msix_entries);
|
||||
} else {
|
||||
free_irq(pdev->irq, ndev);
|
||||
|
||||
|
|
|
@ -45,6 +45,7 @@
|
|||
* Contact Information:
|
||||
* Jon Mason <jon.mason@intel.com>
|
||||
*/
|
||||
#include <linux/ntb.h>
|
||||
|
||||
#define PCI_DEVICE_ID_INTEL_NTB_B2B_JSF 0x3725
|
||||
#define PCI_DEVICE_ID_INTEL_NTB_PS_JSF 0x3726
|
||||
|
@ -60,8 +61,6 @@
|
|||
#define PCI_DEVICE_ID_INTEL_NTB_SS_HSX 0x2F0F
|
||||
#define PCI_DEVICE_ID_INTEL_NTB_B2B_BWD 0x0C4E
|
||||
|
||||
#define msix_table_size(control) ((control & PCI_MSIX_FLAGS_QSIZE)+1)
|
||||
|
||||
#ifndef readq
|
||||
static inline u64 readq(void __iomem *addr)
|
||||
{
|
||||
|
@ -83,9 +82,6 @@ static inline void writeq(u64 val, void __iomem *addr)
|
|||
#define NTB_BAR_MASK ((1 << NTB_BAR_MMIO) | (1 << NTB_BAR_23) |\
|
||||
(1 << NTB_BAR_45))
|
||||
|
||||
#define NTB_LINK_DOWN 0
|
||||
#define NTB_LINK_UP 1
|
||||
|
||||
#define NTB_HB_TIMEOUT msecs_to_jiffies(1000)
|
||||
|
||||
#define NTB_MAX_NUM_MW 2
|
||||
|
@ -233,7 +229,7 @@ int ntb_register_db_callback(struct ntb_device *ndev, unsigned int idx,
|
|||
int db_num));
|
||||
void ntb_unregister_db_callback(struct ntb_device *ndev, unsigned int idx);
|
||||
int ntb_register_event_callback(struct ntb_device *ndev,
|
||||
void (*event_cb_func) (void *handle,
|
||||
void (*event_cb_func)(void *handle,
|
||||
enum ntb_hw_event event));
|
||||
void ntb_unregister_event_callback(struct ntb_device *ndev);
|
||||
int ntb_get_max_spads(struct ntb_device *ndev);
|
||||
|
|
|
@ -56,7 +56,6 @@
|
|||
#include <linux/pci.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/ntb.h>
|
||||
#include "ntb_hw.h"
|
||||
|
||||
#define NTB_TRANSPORT_VERSION 3
|
||||
|
@ -107,8 +106,8 @@ struct ntb_transport_qp {
|
|||
struct ntb_rx_info __iomem *rx_info;
|
||||
struct ntb_rx_info *remote_rx_info;
|
||||
|
||||
void (*tx_handler) (struct ntb_transport_qp *qp, void *qp_data,
|
||||
void *data, int len);
|
||||
void (*tx_handler)(struct ntb_transport_qp *qp, void *qp_data,
|
||||
void *data, int len);
|
||||
struct list_head tx_free_q;
|
||||
spinlock_t ntb_tx_free_q_lock;
|
||||
void __iomem *tx_mw;
|
||||
|
@ -117,8 +116,8 @@ struct ntb_transport_qp {
|
|||
unsigned int tx_max_entry;
|
||||
unsigned int tx_max_frame;
|
||||
|
||||
void (*rx_handler) (struct ntb_transport_qp *qp, void *qp_data,
|
||||
void *data, int len);
|
||||
void (*rx_handler)(struct ntb_transport_qp *qp, void *qp_data,
|
||||
void *data, int len);
|
||||
struct list_head rx_pend_q;
|
||||
struct list_head rx_free_q;
|
||||
spinlock_t ntb_rx_pend_q_lock;
|
||||
|
@ -129,7 +128,7 @@ struct ntb_transport_qp {
|
|||
unsigned int rx_max_frame;
|
||||
dma_cookie_t last_cookie;
|
||||
|
||||
void (*event_handler) (void *data, int status);
|
||||
void (*event_handler)(void *data, int status);
|
||||
struct delayed_work link_work;
|
||||
struct work_struct link_cleanup;
|
||||
|
||||
|
@ -480,7 +479,7 @@ static void ntb_list_add(spinlock_t *lock, struct list_head *entry,
|
|||
}
|
||||
|
||||
static struct ntb_queue_entry *ntb_list_rm(spinlock_t *lock,
|
||||
struct list_head *list)
|
||||
struct list_head *list)
|
||||
{
|
||||
struct ntb_queue_entry *entry;
|
||||
unsigned long flags;
|
||||
|
@ -839,7 +838,7 @@ static void ntb_qp_link_work(struct work_struct *work)
|
|||
}
|
||||
|
||||
static int ntb_transport_init_queue(struct ntb_transport *nt,
|
||||
unsigned int qp_num)
|
||||
unsigned int qp_num)
|
||||
{
|
||||
struct ntb_transport_qp *qp;
|
||||
unsigned int num_qps_mw, tx_size;
|
||||
|
@ -1055,7 +1054,7 @@ static void ntb_async_rx(struct ntb_queue_entry *entry, void *offset,
|
|||
if (!chan)
|
||||
goto err;
|
||||
|
||||
if (len < copy_bytes)
|
||||
if (len < copy_bytes)
|
||||
goto err_wait;
|
||||
|
||||
device = chan->device;
|
||||
|
@ -1190,8 +1189,7 @@ out:
|
|||
return 0;
|
||||
|
||||
err:
|
||||
ntb_list_add(&qp->ntb_rx_pend_q_lock, &entry->entry,
|
||||
&qp->rx_pend_q);
|
||||
ntb_list_add(&qp->ntb_rx_pend_q_lock, &entry->entry, &qp->rx_pend_q);
|
||||
/* Ensure that the data is fully copied out before clearing the flag */
|
||||
wmb();
|
||||
hdr->flags = 0;
|
||||
|
|
|
@ -50,8 +50,13 @@ struct ntb_transport_qp;
|
|||
|
||||
struct ntb_client {
|
||||
struct device_driver driver;
|
||||
int (*probe) (struct pci_dev *pdev);
|
||||
void (*remove) (struct pci_dev *pdev);
|
||||
int (*probe)(struct pci_dev *pdev);
|
||||
void (*remove)(struct pci_dev *pdev);
|
||||
};
|
||||
|
||||
enum {
|
||||
NTB_LINK_DOWN = 0,
|
||||
NTB_LINK_UP,
|
||||
};
|
||||
|
||||
int ntb_register_client(struct ntb_client *drvr);
|
||||
|
@ -60,11 +65,11 @@ int ntb_register_client_dev(char *device_name);
|
|||
void ntb_unregister_client_dev(char *device_name);
|
||||
|
||||
struct ntb_queue_handlers {
|
||||
void (*rx_handler) (struct ntb_transport_qp *qp, void *qp_data,
|
||||
void *data, int len);
|
||||
void (*tx_handler) (struct ntb_transport_qp *qp, void *qp_data,
|
||||
void *data, int len);
|
||||
void (*event_handler) (void *data, int status);
|
||||
void (*rx_handler)(struct ntb_transport_qp *qp, void *qp_data,
|
||||
void *data, int len);
|
||||
void (*tx_handler)(struct ntb_transport_qp *qp, void *qp_data,
|
||||
void *data, int len);
|
||||
void (*event_handler)(void *data, int status);
|
||||
};
|
||||
|
||||
unsigned char ntb_transport_qp_num(struct ntb_transport_qp *qp);
|
||||
|
|
Loading…
Reference in a new issue