be2net: avoid disabling sriov while VFs are assigned
Calling pci_disable_sriov() while VFs are assigned to VMs causes kernel panic. This patch uses PCI_DEV_FLAGS_ASSIGNED bit state of the VF's pci_dev to avoid this. Also, the unconditional function reset cmd issued on a PF probe can delete the VF configuration for the previously enabled VFs. A scratchpad register is now used to issue a function reset only when needed (i.e., in a crash dump scenario.) Signed-off-by: Sathya Perla <sathya.perla@emulex.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sathya Perla
David S. Miller
parent
d301e32568
commit
39f1d94d30
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@ -313,6 +313,11 @@ struct be_vf_cfg {
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u32 tx_rate;
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};
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enum vf_state {
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ENABLED = 0,
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ASSIGNED = 1
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};
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#define BE_FLAGS_LINK_STATUS_INIT 1
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#define BE_FLAGS_WORKER_SCHEDULED (1 << 3)
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#define BE_UC_PMAC_COUNT 30
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@ -403,8 +408,9 @@ struct be_adapter {
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u32 flash_status;
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struct completion flash_compl;
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u32 num_vfs;
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u8 is_virtfn;
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u32 num_vfs; /* Number of VFs provisioned by PF driver */
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u32 dev_num_vfs; /* Number of VFs supported by HW */
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u8 virtfn;
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struct be_vf_cfg *vf_cfg;
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bool be3_native;
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u32 sli_family;
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@ -417,8 +423,10 @@ struct be_adapter {
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u32 uc_macs; /* Count of secondary UC MAC programmed */
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};
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#define be_physfn(adapter) (!adapter->is_virtfn)
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#define be_physfn(adapter) (!adapter->virtfn)
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#define sriov_enabled(adapter) (adapter->num_vfs > 0)
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#define sriov_want(adapter) (adapter->dev_num_vfs && num_vfs && \
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be_physfn(adapter))
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#define for_all_vfs(adapter, vf_cfg, i) \
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for (i = 0, vf_cfg = &adapter->vf_cfg[i]; i < adapter->num_vfs; \
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i++, vf_cfg++)
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@ -547,14 +555,6 @@ static inline u8 is_udp_pkt(struct sk_buff *skb)
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return val;
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}
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static inline void be_check_sriov_fn_type(struct be_adapter *adapter)
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{
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u32 sli_intf;
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pci_read_config_dword(adapter->pdev, SLI_INTF_REG_OFFSET, &sli_intf);
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adapter->is_virtfn = (sli_intf & SLI_INTF_FT_MASK) ? 1 : 0;
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}
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static inline void be_vf_eth_addr_generate(struct be_adapter *adapter, u8 *mac)
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{
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u32 addr;
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@ -58,6 +58,8 @@
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#define SLI_PORT_CONTROL_IP_MASK 0x08000000
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#define PCICFG_CUST_SCRATCHPAD_CSR 0x1EC
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/********* Memory BAR register ************/
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#define PCICFG_MEMBAR_CTRL_INT_CTRL_OFFSET 0xfc
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/* Host Interrupt Enable, if set interrupts are enabled although "PCI Interrupt
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@ -1049,6 +1049,29 @@ static int be_set_vf_tx_rate(struct net_device *netdev,
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return status;
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}
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static int be_find_vfs(struct be_adapter *adapter, int vf_state)
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{
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struct pci_dev *dev, *pdev = adapter->pdev;
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int vfs = 0, assigned_vfs = 0, pos, vf_fn;
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u16 offset, stride;
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pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
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pci_read_config_word(pdev, pos + PCI_SRIOV_VF_OFFSET, &offset);
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pci_read_config_word(pdev, pos + PCI_SRIOV_VF_STRIDE, &stride);
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dev = pci_get_device(pdev->vendor, PCI_ANY_ID, NULL);
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while (dev) {
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vf_fn = (pdev->devfn + offset + stride * vfs) & 0xFFFF;
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if (dev->is_virtfn && dev->devfn == vf_fn) {
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vfs++;
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if (dev->dev_flags & PCI_DEV_FLAGS_ASSIGNED)
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assigned_vfs++;
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}
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dev = pci_get_device(pdev->vendor, PCI_ANY_ID, dev);
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}
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return (vf_state == ASSIGNED) ? assigned_vfs : vfs;
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}
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static void be_eqd_update(struct be_adapter *adapter, struct be_eq_obj *eqo)
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{
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struct be_rx_stats *stats = rx_stats(&adapter->rx_obj[eqo->idx]);
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@ -1789,9 +1812,9 @@ static void be_tx_queues_destroy(struct be_adapter *adapter)
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static int be_num_txqs_want(struct be_adapter *adapter)
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{
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if (sriov_enabled(adapter) || be_is_mc(adapter) ||
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lancer_chip(adapter) || !be_physfn(adapter) ||
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adapter->generation == BE_GEN2)
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if (sriov_want(adapter) || be_is_mc(adapter) ||
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lancer_chip(adapter) || !be_physfn(adapter) ||
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adapter->generation == BE_GEN2)
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return 1;
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else
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return MAX_TX_QS;
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@ -2118,7 +2141,7 @@ static void be_msix_disable(struct be_adapter *adapter)
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static uint be_num_rss_want(struct be_adapter *adapter)
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{
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if ((adapter->function_caps & BE_FUNCTION_CAPS_RSS) &&
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adapter->num_vfs == 0 && be_physfn(adapter) &&
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!sriov_want(adapter) && be_physfn(adapter) &&
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!be_is_mc(adapter))
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return (adapter->be3_native) ? BE3_MAX_RSS_QS : BE2_MAX_RSS_QS;
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else
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@ -2152,53 +2175,6 @@ done:
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return;
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}
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static int be_sriov_enable(struct be_adapter *adapter)
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{
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be_check_sriov_fn_type(adapter);
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#ifdef CONFIG_PCI_IOV
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if (be_physfn(adapter) && num_vfs) {
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int status, pos;
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u16 dev_vfs;
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pos = pci_find_ext_capability(adapter->pdev,
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PCI_EXT_CAP_ID_SRIOV);
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pci_read_config_word(adapter->pdev,
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pos + PCI_SRIOV_TOTAL_VF, &dev_vfs);
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adapter->num_vfs = min_t(u16, num_vfs, dev_vfs);
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if (adapter->num_vfs != num_vfs)
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dev_info(&adapter->pdev->dev,
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"Device supports %d VFs and not %d\n",
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adapter->num_vfs, num_vfs);
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status = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
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if (status)
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adapter->num_vfs = 0;
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if (adapter->num_vfs) {
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adapter->vf_cfg = kcalloc(num_vfs,
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sizeof(struct be_vf_cfg),
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GFP_KERNEL);
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if (!adapter->vf_cfg)
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return -ENOMEM;
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}
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}
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#endif
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return 0;
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}
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static void be_sriov_disable(struct be_adapter *adapter)
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{
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#ifdef CONFIG_PCI_IOV
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if (sriov_enabled(adapter)) {
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pci_disable_sriov(adapter->pdev);
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kfree(adapter->vf_cfg);
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adapter->num_vfs = 0;
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}
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#endif
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}
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static inline int be_msix_vec_get(struct be_adapter *adapter,
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struct be_eq_obj *eqo)
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{
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@ -2500,6 +2476,11 @@ static void be_vf_clear(struct be_adapter *adapter)
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struct be_vf_cfg *vf_cfg;
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u32 vf;
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if (be_find_vfs(adapter, ASSIGNED)) {
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dev_warn(&adapter->pdev->dev, "VFs are assigned to VMs\n");
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goto done;
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}
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for_all_vfs(adapter, vf_cfg, vf) {
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if (lancer_chip(adapter))
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be_cmd_set_mac_list(adapter, NULL, 0, vf + 1);
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@ -2509,6 +2490,10 @@ static void be_vf_clear(struct be_adapter *adapter)
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be_cmd_if_destroy(adapter, vf_cfg->if_handle, vf + 1);
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}
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pci_disable_sriov(adapter->pdev);
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done:
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kfree(adapter->vf_cfg);
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adapter->num_vfs = 0;
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}
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static int be_clear(struct be_adapter *adapter)
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@ -2538,29 +2523,60 @@ static int be_clear(struct be_adapter *adapter)
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be_cmd_fw_clean(adapter);
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be_msix_disable(adapter);
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kfree(adapter->pmac_id);
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pci_write_config_dword(adapter->pdev, PCICFG_CUST_SCRATCHPAD_CSR, 0);
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return 0;
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}
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static void be_vf_setup_init(struct be_adapter *adapter)
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static int be_vf_setup_init(struct be_adapter *adapter)
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{
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struct be_vf_cfg *vf_cfg;
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int vf;
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adapter->vf_cfg = kcalloc(adapter->num_vfs, sizeof(*vf_cfg),
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GFP_KERNEL);
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if (!adapter->vf_cfg)
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return -ENOMEM;
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for_all_vfs(adapter, vf_cfg, vf) {
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vf_cfg->if_handle = -1;
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vf_cfg->pmac_id = -1;
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}
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return 0;
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}
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static int be_vf_setup(struct be_adapter *adapter)
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{
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struct be_vf_cfg *vf_cfg;
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struct device *dev = &adapter->pdev->dev;
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u32 cap_flags, en_flags, vf;
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u16 def_vlan, lnk_speed;
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int status;
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int status, enabled_vfs;
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be_vf_setup_init(adapter);
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enabled_vfs = be_find_vfs(adapter, ENABLED);
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if (enabled_vfs) {
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dev_warn(dev, "%d VFs are already enabled\n", enabled_vfs);
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dev_warn(dev, "Ignoring num_vfs=%d setting\n", num_vfs);
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return 0;
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}
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if (num_vfs > adapter->dev_num_vfs) {
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dev_warn(dev, "Device supports %d VFs and not %d\n",
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adapter->dev_num_vfs, num_vfs);
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num_vfs = adapter->dev_num_vfs;
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}
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status = pci_enable_sriov(adapter->pdev, num_vfs);
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if (!status) {
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adapter->num_vfs = num_vfs;
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} else {
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/* Platform doesn't support SRIOV though device supports it */
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dev_warn(dev, "SRIOV enable failed\n");
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return 0;
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}
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status = be_vf_setup_init(adapter);
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if (status)
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goto err;
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cap_flags = en_flags = BE_IF_FLAGS_UNTAGGED | BE_IF_FLAGS_BROADCAST |
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BE_IF_FLAGS_MULTICAST;
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@ -2571,9 +2587,11 @@ static int be_vf_setup(struct be_adapter *adapter)
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goto err;
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}
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status = be_vf_eth_addr_config(adapter);
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if (status)
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goto err;
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if (!enabled_vfs) {
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status = be_vf_eth_addr_config(adapter);
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if (status)
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goto err;
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}
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for_all_vfs(adapter, vf_cfg, vf) {
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status = be_cmd_link_status_query(adapter, NULL, &lnk_speed,
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@ -2630,9 +2648,25 @@ do_none:
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return status;
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}
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/* Routine to query per function resource limits */
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static int be_get_config(struct be_adapter *adapter)
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{
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int pos;
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u16 dev_num_vfs;
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pos = pci_find_ext_capability(adapter->pdev, PCI_EXT_CAP_ID_SRIOV);
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if (pos) {
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pci_read_config_word(adapter->pdev, pos + PCI_SRIOV_TOTAL_VF,
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&dev_num_vfs);
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adapter->dev_num_vfs = dev_num_vfs;
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}
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return 0;
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}
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static int be_setup(struct be_adapter *adapter)
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{
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struct net_device *netdev = adapter->netdev;
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struct device *dev = &adapter->pdev->dev;
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u32 cap_flags, en_flags;
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u32 tx_fc, rx_fc;
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int status;
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@ -2640,6 +2674,8 @@ static int be_setup(struct be_adapter *adapter)
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be_setup_init(adapter);
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be_get_config(adapter);
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be_cmd_req_native_mode(adapter);
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be_msix_enable(adapter);
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@ -2718,10 +2754,11 @@ static int be_setup(struct be_adapter *adapter)
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pcie_set_readrq(adapter->pdev, 4096);
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if (sriov_enabled(adapter)) {
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status = be_vf_setup(adapter);
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if (status)
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goto err;
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if (be_physfn(adapter) && num_vfs) {
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if (adapter->dev_num_vfs)
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be_vf_setup(adapter);
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else
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dev_warn(dev, "device doesn't support SRIOV\n");
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}
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be_cmd_get_phy_info(adapter);
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@ -2731,6 +2768,7 @@ static int be_setup(struct be_adapter *adapter)
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schedule_delayed_work(&adapter->work, msecs_to_jiffies(1000));
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adapter->flags |= BE_FLAGS_WORKER_SCHEDULED;
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pci_write_config_dword(adapter->pdev, PCICFG_CUST_SCRATCHPAD_CSR, 1);
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return 0;
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err:
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be_clear(adapter);
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@ -3352,8 +3390,6 @@ static void __devexit be_remove(struct pci_dev *pdev)
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be_ctrl_cleanup(adapter);
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be_sriov_disable(adapter);
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pci_set_drvdata(pdev, NULL);
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pci_release_regions(pdev);
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pci_disable_device(pdev);
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@ -3367,7 +3403,7 @@ bool be_is_wol_supported(struct be_adapter *adapter)
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!be_is_wol_excluded(adapter)) ? true : false;
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}
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static int be_get_config(struct be_adapter *adapter)
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static int be_get_initial_config(struct be_adapter *adapter)
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{
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int status;
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@ -3410,7 +3446,7 @@ static int be_get_config(struct be_adapter *adapter)
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return 0;
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}
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static int be_dev_family_check(struct be_adapter *adapter)
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static int be_dev_type_check(struct be_adapter *adapter)
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{
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struct pci_dev *pdev = adapter->pdev;
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u32 sli_intf = 0, if_type;
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@ -3443,6 +3479,9 @@ static int be_dev_family_check(struct be_adapter *adapter)
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default:
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adapter->generation = 0;
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}
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pci_read_config_dword(adapter->pdev, SLI_INTF_REG_OFFSET, &sli_intf);
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adapter->virtfn = (sli_intf & SLI_INTF_FT_MASK) ? 1 : 0;
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return 0;
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}
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@ -3586,6 +3625,14 @@ reschedule:
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schedule_delayed_work(&adapter->work, msecs_to_jiffies(1000));
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}
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static bool be_reset_required(struct be_adapter *adapter)
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{
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u32 reg;
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pci_read_config_dword(adapter->pdev, PCICFG_CUST_SCRATCHPAD_CSR, ®);
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return reg;
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}
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static int __devinit be_probe(struct pci_dev *pdev,
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const struct pci_device_id *pdev_id)
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{
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@ -3611,7 +3658,7 @@ static int __devinit be_probe(struct pci_dev *pdev,
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adapter->pdev = pdev;
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pci_set_drvdata(pdev, adapter);
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status = be_dev_family_check(adapter);
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status = be_dev_type_check(adapter);
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if (status)
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goto free_netdev;
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@ -3629,13 +3676,9 @@ static int __devinit be_probe(struct pci_dev *pdev,
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}
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}
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status = be_sriov_enable(adapter);
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if (status)
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goto free_netdev;
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status = be_ctrl_init(adapter);
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if (status)
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goto disable_sriov;
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goto free_netdev;
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if (lancer_chip(adapter)) {
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status = lancer_wait_ready(adapter);
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@ -3662,9 +3705,11 @@ static int __devinit be_probe(struct pci_dev *pdev,
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if (status)
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goto ctrl_clean;
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status = be_cmd_reset_function(adapter);
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if (status)
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goto ctrl_clean;
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if (be_reset_required(adapter)) {
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status = be_cmd_reset_function(adapter);
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if (status)
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goto ctrl_clean;
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}
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/* The INTR bit may be set in the card when probed by a kdump kernel
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* after a crash.
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@ -3676,7 +3721,7 @@ static int __devinit be_probe(struct pci_dev *pdev,
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if (status)
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goto ctrl_clean;
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status = be_get_config(adapter);
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status = be_get_initial_config(adapter);
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if (status)
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goto stats_clean;
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@ -3705,8 +3750,6 @@ stats_clean:
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be_stats_cleanup(adapter);
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ctrl_clean:
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be_ctrl_cleanup(adapter);
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disable_sriov:
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be_sriov_disable(adapter);
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free_netdev:
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free_netdev(netdev);
|
||||
pci_set_drvdata(pdev, NULL);
|
||||
|
|
|
|||
Loading…
Reference in a new issue