lkml.org 
[lkml]   [2016]   [Apr]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/4] net: thunderx: add sysfs attribute for SQS/SVF assigments
Date
From: Radoslaw Biernacki <rad@semihalf.com>

With this sysfs attribute (sriov_sqs_assignment) administrator will be
able to read the current assigment of SQS/SVF for a given VF. This is
useful to decide which VFs needs to be attached to UIO for a successful
allocation of secondary Qsets

Signed-off-by: Radoslaw Biernacki <rad@semihalf.com>
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
---
drivers/net/ethernet/cavium/thunder/nic_main.c | 67 +++++++++++++++++++++++-
1 files changed, 66 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ethernet/cavium/thunder/nic_main.c b/drivers/net/ethernet/cavium/thunder/nic_main.c
index d6a6914..e2d8db9 100644
--- a/drivers/net/ethernet/cavium/thunder/nic_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nic_main.c
@@ -1159,6 +1159,60 @@ static void nic_poll_for_link(struct work_struct *work)
queue_delayed_work(nic->check_link, &nic->dwork, HZ * 2);
}

+ssize_t sriov_sqs_assignment_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
+ struct pci_dev *vf_dev;
+ struct pci_driver *vf_drv;
+ struct nicpf *nic = pci_get_drvdata(pdev);
+ size_t vf, off, svf_idx;
+
+ off = scnprintf(buf, PAGE_SIZE, "%u\n", nic->num_vf_en);
+
+ for (vf = 0; vf < nic->num_vf_en; vf++) {
+ vf_dev = nic->vf_pdev[vf];
+ vf_drv = vf_dev ? pci_dev_driver(vf_dev) : NULL;
+ if (off >= PAGE_SIZE)
+ break;
+ off += scnprintf(&buf[off], PAGE_SIZE - off,
+ "%zu %04x:%02x:%02x.%d %s %c:",
+ vf, pci_domain_nr(vf_dev->bus),
+ vf_dev->bus->number, PCI_SLOT(vf_dev->devfn),
+ PCI_FUNC(vf_dev->devfn),
+ vf_drv ? vf_drv->name : "no-driver",
+ nic->vf_enabled[vf] ? '+' : '-');
+ for (svf_idx = 0; svf_idx < MAX_SQS_PER_VF; svf_idx++) {
+ if (off >= PAGE_SIZE)
+ break;
+ if (nic->vf_sqs[vf][svf_idx] == NIC_VF_UNASSIGNED)
+ break;
+ off += scnprintf(&buf[off], PAGE_SIZE - off, " %d",
+ nic->vf_sqs[vf][svf_idx]);
+ }
+ if (off >= PAGE_SIZE)
+ break;
+ off += scnprintf(&buf[off], PAGE_SIZE - off, "\n");
+ }
+
+ for (vf = nic->num_vf_en; vf < nic->num_vf_en + nic->num_sqs_en; vf++) {
+ vf_dev = nic->vf_pdev[vf];
+ vf_drv = vf_dev ? pci_dev_driver(vf_dev) : NULL;
+ if (off >= PAGE_SIZE)
+ break;
+ off += scnprintf(&buf[off], PAGE_SIZE - off,
+ "%zu %04x:%02x:%02x.%d %s: %u\n",
+ vf, pci_domain_nr(vf_dev->bus),
+ vf_dev->bus->number, PCI_SLOT(vf_dev->devfn),
+ PCI_FUNC(vf_dev->devfn),
+ vf_drv ? vf_drv->name : "no-driver",
+ nic->pqs_vf[vf]);
+ }
+
+ return off;
+}
+DEVICE_ATTR_RO(sriov_sqs_assignment);
+
static int nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct device *dev = &pdev->dev;
@@ -1235,12 +1289,18 @@ static int nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
if (err)
goto err_unregister_interrupts;

+ err = device_create_file(dev, &dev_attr_sriov_sqs_assignment);
+ if (err) {
+ err = -ENOMEM;
+ goto err_disable_sriov;
+ }
+
/* Register a physical link status poll fn() */
nic->check_link = alloc_workqueue("check_link_status",
WQ_UNBOUND | WQ_MEM_RECLAIM, 1);
if (!nic->check_link) {
err = -ENOMEM;
- goto err_disable_sriov;
+ goto err_remove_sysfs_attr;
}

INIT_DELAYED_WORK(&nic->dwork, nic_poll_for_link);
@@ -1248,6 +1308,8 @@ static int nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)

return 0;

+err_remove_sysfs_attr:
+ device_remove_file(dev, &dev_attr_sriov_sqs_assignment);
err_disable_sriov:
if (nic->flags & NIC_SRIOV_ENABLED) {
nic_put_vf_pdev(nic);
@@ -1266,6 +1328,9 @@ err_disable_device:
static void nic_remove(struct pci_dev *pdev)
{
struct nicpf *nic = pci_get_drvdata(pdev);
+ struct device *dev = &pdev->dev;
+
+ device_remove_file(dev, &dev_attr_sriov_sqs_assignment);

if (nic->flags & NIC_SRIOV_ENABLED) {
nic_put_vf_pdev(nic);
--
1.7.1
\
 
 \ /
  Last update: 2016-04-19 15:41    [W:0.055 / U:0.388 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site