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Date: Wed, 04 Nov 2009 17:31:41 +0200
From: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
To: rdreier@...co.com
CC: linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
liranl@...lanox.co.il, tziporet@...lanox.co.il,
yevgenyp@...lanox.co.il
Subject: [PATCH 16/25] mlx4_core: boot sriov
Add virtual function device ids.
Establish comm channel when sriov is enabled, and boot vfs through it.
Each slave gets one msi-X for completions, the master also gets one for
async events.
Signed-off-by: Liran Liss <liranl@...lanox.co.il>
Signed-off-by: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
---
drivers/net/mlx4/eq.c | 21 ++--
drivers/net/mlx4/main.c | 315 +++++++++++++++++++++++++++++++++++++----------
2 files changed, 260 insertions(+), 76 deletions(-)
diff --git a/drivers/net/mlx4/eq.c b/drivers/net/mlx4/eq.c
index b0c8022..29b2cd6 100644
--- a/drivers/net/mlx4/eq.c
+++ b/drivers/net/mlx4/eq.c
@@ -770,16 +770,18 @@ int mlx4_init_eq_table(struct mlx4_dev *dev)
goto err_out_unmap;
}
- err = mlx4_create_eq(dev, MLX4_NUM_ASYNC_EQE + MLX4_NUM_SPARE_EQE,
- (dev->flags & MLX4_FLAG_MSI_X) ? dev->caps.num_comp_vectors : 0,
- &priv->eq_table.eq[dev->caps.num_comp_vectors]);
- if (err)
- goto err_out_comp;
+ if (!mlx4_is_slave(dev)) {
+ err = mlx4_create_eq(dev, MLX4_NUM_ASYNC_EQE + MLX4_NUM_SPARE_EQE,
+ (dev->flags & MLX4_FLAG_MSI_X) ? dev->caps.num_comp_vectors : 0,
+ &priv->eq_table.eq[dev->caps.num_comp_vectors]);
+ if (err)
+ goto err_out_comp;
+ }
if (dev->flags & MLX4_FLAG_MSI_X) {
const char *eq_name;
- for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i) {
+ for (i = 0; i < dev->caps.num_comp_vectors + !(mlx4_is_slave(dev)); ++i) {
if (i < dev->caps.num_comp_vectors) {
snprintf(priv->eq_table.irq_names +
i * MLX4_IRQNAME_SIZE,
@@ -825,13 +827,14 @@ int mlx4_init_eq_table(struct mlx4_dev *dev)
priv->eq_table.eq[dev->caps.num_comp_vectors].eqn, err);
}
- for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
+ for (i = 0; i < dev->caps.num_comp_vectors + !(mlx4_is_slave(dev)); ++i)
eq_set_ci(&priv->eq_table.eq[i], 1);
return 0;
err_out_async:
- mlx4_free_eq(dev, &priv->eq_table.eq[dev->caps.num_comp_vectors]);
+ if (!mlx4_is_slave(dev))
+ mlx4_free_eq(dev, &priv->eq_table.eq[dev->caps.num_comp_vectors]);
err_out_comp:
i = dev->caps.num_comp_vectors;
@@ -866,7 +869,7 @@ void mlx4_cleanup_eq_table(struct mlx4_dev *dev)
mlx4_free_irqs(dev);
- for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
+ for (i = 0; i < dev->caps.num_comp_vectors + !mlx4_is_slave(dev); ++i)
mlx4_free_eq(dev, &priv->eq_table.eq[i]);
if (!mlx4_is_slave(dev))
diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c
index 2852445..c2b6b35 100644
--- a/drivers/net/mlx4/main.c
+++ b/drivers/net/mlx4/main.c
@@ -73,6 +73,18 @@ MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");
#endif /* CONFIG_PCI_MSI */
+#ifdef CONFIG_PCI_IOV
+
+static int sr_iov;
+module_param(sr_iov, int, 0444);
+MODULE_PARM_DESC(sr_iov, "enable #sr_iov functions if sr_iov > 0");
+
+static int probe_vf;
+module_param(probe_vf, int, 0444);
+MODULE_PARM_DESC(probe_vf, "number of vfs to probe by pf driver (sr_iov > 0)");
+
+#endif /* CONFIG_PCI_IOV */
+
static char mlx4_version[] __devinitdata =
DRV_NAME ": Mellanox ConnectX core driver v"
DRV_VERSION " (" DRV_RELDATE ")\n";
@@ -779,12 +791,56 @@ static void mlx4_free_icms(struct mlx4_dev *dev)
mlx4_free_icm(dev, priv->fw.aux_icm, 0);
}
+static void mlx4_slave_exit(struct mlx4_dev *dev)
+{
+ struct mlx4_priv *priv = mlx4_priv(dev);
+
+ down(&priv->cmd.poll_sem);
+ if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_RESET, 0, MLX4_COMM_TIME))
+ mlx4_warn(dev, "Failed to close slave function.\n");
+ up(&priv->cmd.poll_sem);
+}
+
static void mlx4_close_hca(struct mlx4_dev *dev)
{
- mlx4_CLOSE_HCA(dev, 0);
- mlx4_free_icms(dev);
- mlx4_UNMAP_FA(dev);
- mlx4_free_icm(dev, mlx4_priv(dev)->fw.fw_icm, 0);
+ if (mlx4_is_slave(dev))
+ mlx4_slave_exit(dev);
+ else {
+ mlx4_CLOSE_HCA(dev, 0);
+ mlx4_free_icms(dev);
+ mlx4_UNMAP_FA(dev);
+ mlx4_free_icm(dev, mlx4_priv(dev)->fw.fw_icm, 0);
+ }
+}
+
+static int mlx4_init_slave(struct mlx4_dev *dev)
+{
+ struct mlx4_priv *priv = mlx4_priv(dev);
+ u64 dma = (u64) priv->mfunc.vhcr_dma;
+
+ down(&priv->cmd.poll_sem);
+ mlx4_warn(dev, "Sending reset\n");
+ if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_RESET, 0, MLX4_COMM_TIME))
+ goto err;
+ mlx4_warn(dev, "Sending vhcr0\n");
+ if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR0, dma >> 48,
+ MLX4_COMM_TIME))
+ goto err;
+ if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR1, dma >> 32,
+ MLX4_COMM_TIME))
+ goto err;
+ if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR2, dma >> 16,
+ MLX4_COMM_TIME))
+ goto err;
+ if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR_EN, dma, MLX4_COMM_TIME))
+ goto err;
+ up(&priv->cmd.poll_sem);
+ return 0;
+
+err:
+ mlx4_comm_cmd(dev, MLX4_COMM_CMD_RESET, 0, 0);
+ up(&priv->cmd.poll_sem);
+ return -EIO;
}
static int mlx4_init_hca(struct mlx4_dev *dev)
@@ -798,51 +854,67 @@ static int mlx4_init_hca(struct mlx4_dev *dev)
u64 icm_size;
int err;
- err = mlx4_QUERY_FW(dev);
- if (err) {
- if (err == -EACCES)
- mlx4_info(dev, "non-primary physical function, skipping.\n");
- else
- mlx4_err(dev, "QUERY_FW command failed, aborting.\n");
- return err;
- }
+ if (!mlx4_is_slave(dev)) {
+ err = mlx4_QUERY_FW(dev); /* TODO: verify FW version in slaves as well */
+ if (err) {
+ if (err == -EACCES)
+ mlx4_info(dev, "non-primary physical function, skipping.\n");
+ else {
+ mlx4_err(dev, "QUERY_FW command failed, aborting.\n");
+ if (mlx4_is_master(dev))
+ mlx4_err(dev, "Are you using SRIOV-enabled firmware?\n");
+ }
+ return err;
+ }
- err = mlx4_load_fw(dev);
- if (err) {
- mlx4_err(dev, "Failed to start FW, aborting.\n");
- return err;
- }
+ err = mlx4_load_fw(dev);
+ if (err) {
+ mlx4_err(dev, "Failed to start FW, aborting.\n");
+ return err;
+ }
- mlx4_cfg.log_pg_sz_m = 1;
- mlx4_cfg.log_pg_sz = 0;
- err = mlx4_MOD_STAT_CFG(dev, &mlx4_cfg);
- if (err)
- mlx4_warn(dev, "Failed to override log_pg_sz parameter\n");
+ mlx4_cfg.log_pg_sz_m = 1;
+ mlx4_cfg.log_pg_sz = 0;
+ err = mlx4_MOD_STAT_CFG(dev, &mlx4_cfg);
+ if (err)
+ mlx4_warn(dev, "Failed to override log_pg_sz parameter\n");
- err = mlx4_dev_cap(dev, &dev_cap);
- if (err) {
- mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting.\n");
- goto err_stop_fw;
- }
+ err = mlx4_dev_cap(dev, &dev_cap);
+ if (err) {
+ mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting.\n");
+ goto err_stop_fw;
+ }
- profile = default_profile;
+ profile = default_profile;
+ icm_size = mlx4_make_profile(dev, &profile, &dev_cap, &init_hca);
+ if ((long long) icm_size < 0) {
+ err = icm_size;
+ goto err_stop_fw;
+ }
- icm_size = mlx4_make_profile(dev, &profile, &dev_cap, &init_hca);
- if ((long long) icm_size < 0) {
- err = icm_size;
- goto err_stop_fw;
- }
+ init_hca.log_uar_sz = ilog2(dev->caps.num_uars);
- init_hca.log_uar_sz = ilog2(dev->caps.num_uars);
+ err = mlx4_init_icm(dev, &dev_cap, &init_hca, icm_size);
+ if (err)
+ goto err_stop_fw;
- err = mlx4_init_icm(dev, &dev_cap, &init_hca, icm_size);
- if (err)
- goto err_stop_fw;
+ err = mlx4_INIT_HCA(dev, &init_hca);
+ if (err) {
+ mlx4_err(dev, "INIT_HCA command failed, aborting.\n");
+ goto err_free_icm;
+ }
+ } else {
+ err = mlx4_init_slave(dev);
+ if (err) {
+ mlx4_err(dev, "Failed to initialize slave\n");
+ return err;
+ }
- err = mlx4_INIT_HCA(dev, &init_hca);
- if (err) {
- mlx4_err(dev, "INIT_HCA command failed, aborting.\n");
- goto err_free_icm;
+ err = mlx4_slave_cap(dev);
+ if (err) {
+ mlx4_err(dev, "Failed to obtain slave caps\n");
+ goto err_close;
+ }
}
err = mlx4_QUERY_ADAPTER(dev, &adapter);
@@ -857,15 +929,17 @@ static int mlx4_init_hca(struct mlx4_dev *dev)
return 0;
err_close:
- mlx4_CLOSE_HCA(dev, 0);
+ mlx4_close_hca(dev);
err_free_icm:
- mlx4_free_icms(dev);
+ if (!mlx4_is_slave(dev))
+ mlx4_free_icms(dev);
err_stop_fw:
- mlx4_UNMAP_FA(dev);
- mlx4_free_icm(dev, priv->fw.fw_icm, 0);
-
+ if (!mlx4_is_slave(dev)) {
+ mlx4_UNMAP_FA(dev);
+ mlx4_free_icm(dev, priv->fw.fw_icm, 0);
+ }
return err;
}
@@ -1019,8 +1093,13 @@ static void mlx4_enable_msi_x(struct mlx4_dev *dev)
int i;
if (msi_x) {
- nreq = min_t(int, dev->caps.num_eqs - dev->caps.reserved_eqs,
- num_possible_cpus() + 1);
+ /* The master only uses en event EQ,
+ * Each one of the slaves have 1 completion eq */
+ if (mlx4_is_mfunc(dev))
+ nreq = 1;
+ else
+ nreq = min_t(int, dev->caps.num_eqs - dev->caps.reserved_eqs,
+ num_possible_cpus() + 1);
entries = kcalloc(nreq, sizeof *entries, GFP_KERNEL);
if (!entries)
goto no_msi;
@@ -1029,8 +1108,10 @@ static void mlx4_enable_msi_x(struct mlx4_dev *dev)
entries[i].entry = i;
retry:
+ printk("Requesting %d MSIX vectors\n", nreq);
err = pci_enable_msix(dev->pdev, entries, nreq);
if (err) {
+ printk("pci_enable_msix failed\n");
/* Try again if at least 2 vectors are available */
if (err > 1) {
mlx4_info(dev, "Requested %d vectors, "
@@ -1043,7 +1124,7 @@ static void mlx4_enable_msi_x(struct mlx4_dev *dev)
goto no_msi;
}
- dev->caps.num_comp_vectors = nreq - 1;
+ dev->caps.num_comp_vectors = nreq - !mlx4_is_slave(dev);
for (i = 0; i < nreq; ++i)
priv->eq_table.eq[i].irq = entries[i].vector;
@@ -1054,7 +1135,9 @@ static void mlx4_enable_msi_x(struct mlx4_dev *dev)
}
no_msi:
- dev->caps.num_comp_vectors = 1;
+ /* CX1: no completion vectors needed for the master since it doesn't
+ * have interfaces */
+ dev->caps.num_comp_vectors = mlx4_is_master(dev) ? 0 : 1;
for (i = 0; i < 2; ++i)
priv->eq_table.eq[i].irq = dev->pdev->irq;
@@ -1111,10 +1194,9 @@ static int __mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
}
/*
- * Check for BARs. We expect 0: 1MB
+ * Check for BARs.
*/
- if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
- pci_resource_len(pdev, 0) != 1 << 20) {
+ if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
dev_err(&pdev->dev, "Missing DCS, aborting.\n");
err = -ENODEV;
goto err_disable_pdev;
@@ -1172,34 +1254,98 @@ static int __mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
INIT_LIST_HEAD(&priv->pgdir_list);
mutex_init(&priv->pgdir_mutex);
- /*
- * Now reset the HCA before we touch the PCI capabilities or
- * attempt a firmware command, since a boot ROM may have left
- * the HCA in an undefined state.
- */
- err = mlx4_reset(dev);
- if (err) {
- mlx4_err(dev, "Failed to reset HCA, aborting.\n");
- goto err_free_dev;
+ /* Detect if this device is a virtual function */
+ switch (id->device) {
+ case 0x6341:
+ case 0x634b:
+ case 0x6733:
+ case 0x673d:
+ case 0x6369:
+ case 0x6751:
+ case 0x6765:
+#ifdef CONFIG_PCI_IOV
+ /* When acting as pf, we normally skip vfs unless explicitly
+ * requested to probe them.
+ * TODO: add ARI support */
+ if (sr_iov && PCI_FUNC(pdev->devfn) > probe_vf) {
+ mlx4_warn(dev, "Skipping virtual function:%d\n",
+ PCI_FUNC(pdev->devfn));
+ err = -ENODEV;
+ goto err_free_dev;
+ }
+#endif /* CONFIG_PCI_IOV */
+ mlx4_warn(dev, "Detected virtual function - running in slave mode\n");
+ dev->flags |= MLX4_FLAG_SLAVE;
+ break;
+ default:
+ ;
+ }
+
+ /* We reset the device and enable SRIOV only for physical devices */
+ if (!mlx4_is_slave(dev)) {
+ /*
+ * Now reset the HCA before we touch the PCI capabilities or
+ * attempt a firmware command, since a boot ROM may have left
+ * the HCA in an undefined state.
+ */
+ err = mlx4_reset(dev);
+ if (err) {
+ mlx4_err(dev, "Failed to reset HCA, aborting.\n");
+ goto err_free_dev;
+ }
+#ifdef CONFIG_PCI_IOV
+ if (sr_iov) {
+ mlx4_warn(dev, "Enabling sriov with:%d vfs\n", sr_iov);
+ if (pci_enable_sriov(pdev, sr_iov)) {
+ mlx4_err(dev, "Failed to enable sriov, aborting.\n");
+ goto err_free_dev;
+ }
+ mlx4_warn(dev, "Running in master mode\n");
+ dev->flags |= MLX4_FLAG_SRIOV | MLX4_FLAG_MASTER;
+ dev->num_slaves = sr_iov;
+ }
+#endif /* CONFIG_PCI_IOV */
}
if (mlx4_cmd_init(dev)) {
mlx4_err(dev, "Failed to init command interface, aborting.\n");
- goto err_free_dev;
+ goto err_sriov;
+ }
+
+ /* In slave functions, the communication channel must be initialized before
+ * posting commands */
+ if (mlx4_is_slave(dev)) {
+ if (mlx4_multi_func_init(dev)) {
+ mlx4_err(dev, "Failed to init slave mfunc interface, aborting.\n");
+ goto err_cmd;
+ }
}
err = mlx4_init_hca(dev);
if (err)
goto err_cmd;
+ /* In master functions, the communication channel must be initialized after obtaining
+ * its address from fw */
+ if (mlx4_is_master(dev)) {
+ if (mlx4_multi_func_init(dev)) {
+ mlx4_err(dev, "Failed to init master mfunc interface, aborting.\n");
+ goto err_close;
+ }
+ }
+
err = mlx4_alloc_eq_table(dev);
if (err)
goto err_close;
mlx4_enable_msi_x(dev);
+ if (mlx4_is_slave(dev) && !(dev->flags & MLX4_FLAG_MSI_X)) {
+ mlx4_err(dev, "INTx is not supported in slave mode, aborting.\n");
+ goto err_free_eq;
+ }
err = mlx4_setup_hca(dev);
- if (err == -EBUSY && (dev->flags & MLX4_FLAG_MSI_X)) {
+ if (err == -EBUSY && (dev->flags & MLX4_FLAG_MSI_X) && !mlx4_is_slave(dev)) {
dev->flags &= ~MLX4_FLAG_MSI_X;
pci_disable_msix(pdev);
err = mlx4_setup_hca(dev);
@@ -1223,6 +1369,12 @@ static int __mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
pci_set_drvdata(pdev, dev);
+ /* Start serving comm channel:
+ * - In master function: poll for commands
+ * - in slave functions: poll for events
+ * TODO - enable comm channel interrupts */
+ if (mlx4_is_master(dev) || mlx4_is_slave(dev))
+ queue_delayed_work(priv->mfunc.comm_wq, &priv->mfunc.comm_work, 0);
return 0;
err_port:
@@ -1233,7 +1385,8 @@ err_port:
mlx4_cleanup_qp_table(dev);
mlx4_cleanup_srq_table(dev);
mlx4_cleanup_cq_table(dev);
- mlx4_cmd_use_polling(dev);
+ if (!mlx4_is_master(dev) && !mlx4_is_slave(dev))
+ mlx4_cmd_use_polling(dev);
mlx4_cleanup_eq_table(dev);
mlx4_cleanup_mr_table(dev);
mlx4_cleanup_pd_table(dev);
@@ -1251,6 +1404,14 @@ err_close:
err_cmd:
mlx4_cmd_cleanup(dev);
+err_sriov:
+ if (mlx4_is_master(dev) || mlx4_is_slave(dev))
+ mlx4_multi_func_cleanup(dev);
+#ifdef CONFIG_PCI_IOV
+ if (dev->flags & MLX4_FLAG_SRIOV)
+ pci_disable_sriov(pdev);
+#endif /* CONFIG_PCI_IOV */
+
err_free_dev:
kfree(priv);
@@ -1283,19 +1444,24 @@ static void mlx4_remove_one(struct pci_dev *pdev)
int p;
if (dev) {
+ /* Stop serving commands and events over comm channel */
+ if (mlx4_is_master(dev) || mlx4_is_slave(dev))
+ cancel_delayed_work_sync(&priv->mfunc.comm_work);
mlx4_stop_sense(dev);
mlx4_unregister_device(dev);
for (p = 1; p <= dev->caps.num_ports; p++) {
mlx4_cleanup_port_info(&priv->port[p]);
- mlx4_CLOSE_PORT(dev, p);
+ if (!mlx4_is_slave(dev))
+ mlx4_CLOSE_PORT(dev, p);
}
mlx4_cleanup_mcg_table(dev);
mlx4_cleanup_qp_table(dev);
mlx4_cleanup_srq_table(dev);
mlx4_cleanup_cq_table(dev);
- mlx4_cmd_use_polling(dev);
+ if (!mlx4_is_master(dev) && !mlx4_is_slave(dev))
+ mlx4_cmd_use_polling(dev);
mlx4_cleanup_eq_table(dev);
mlx4_cleanup_mr_table(dev);
mlx4_cleanup_pd_table(dev);
@@ -1303,10 +1469,18 @@ static void mlx4_remove_one(struct pci_dev *pdev)
mlx4_cleanup_uar_table(dev);
mlx4_free_eq_table(dev);
mlx4_close_hca(dev);
+ if (mlx4_is_master(dev) || mlx4_is_slave(dev))
+ mlx4_multi_func_cleanup(dev);
mlx4_cmd_cleanup(dev);
if (dev->flags & MLX4_FLAG_MSI_X)
pci_disable_msix(pdev);
+#ifdef CONFIG_PCI_IOV
+ if (dev->flags & MLX4_FLAG_SRIOV) {
+ mlx4_warn(dev, "Disabling sriov\n");
+ pci_disable_sriov(pdev);
+ }
+#endif /* CONFIG_PCI_IOV */
kfree(priv);
pci_release_regions(pdev);
@@ -1321,14 +1495,21 @@ int mlx4_restart_one(struct pci_dev *pdev)
return __mlx4_init_one(pdev, NULL);
}
+
static struct pci_device_id mlx4_pci_table[] = {
{ PCI_VDEVICE(MELLANOX, 0x6340) }, /* MT25408 "Hermon" SDR */
+ { PCI_VDEVICE(MELLANOX, 0x6341) }, /* MT25408 "Hermon" SDR VF */
{ PCI_VDEVICE(MELLANOX, 0x634a) }, /* MT25408 "Hermon" DDR */
+ { PCI_VDEVICE(MELLANOX, 0x634b) }, /* MT25408 "Hermon" DDR VF */
{ PCI_VDEVICE(MELLANOX, 0x6354) }, /* MT25408 "Hermon" QDR */
{ PCI_VDEVICE(MELLANOX, 0x6732) }, /* MT25408 "Hermon" DDR PCIe gen2 */
+ { PCI_VDEVICE(MELLANOX, 0x6733) }, /* MT25408 "Hermon" DDR PCIe gen2 VF */
{ PCI_VDEVICE(MELLANOX, 0x673c) }, /* MT25408 "Hermon" QDR PCIe gen2 */
+ { PCI_VDEVICE(MELLANOX, 0x673d) }, /* MT25408 "Hermon" QDR PCIe gen2 VF */
{ PCI_VDEVICE(MELLANOX, 0x6368) }, /* MT25408 "Hermon" EN 10GigE */
+ { PCI_VDEVICE(MELLANOX, 0x6369) }, /* MT25408 "Hermon" EN 10GigE VF */
{ PCI_VDEVICE(MELLANOX, 0x6750) }, /* MT25408 "Hermon" EN 10GigE PCIe gen2 */
+ { PCI_VDEVICE(MELLANOX, 0x6751) }, /* MT25408 "Hermon" EN 10GigE PCIe gen2 VF */
{ PCI_VDEVICE(MELLANOX, 0x6372) }, /* MT25458 ConnectX EN 10GBASE-T 10GigE */
{ PCI_VDEVICE(MELLANOX, 0x675a) }, /* MT25458 ConnectX EN 10GBASE-T+Gen2 10GigE */
{ PCI_VDEVICE(MELLANOX, 0x6764) }, /* MT26468 ConnectX EN 10GigE PCIe gen2*/
--
1.6.1.3
--
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