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authorJakub Kicinski <kuba@kernel.org>2021-04-09 18:07:20 -0700
committerJakub Kicinski <kuba@kernel.org>2021-04-09 18:07:21 -0700
commit95b5c291322be25431391d08020db0138631c8b2 (patch)
tree81524ce2a85f9a93336dc01047952c23f18dfdaa /drivers/pci
parent626b598aa8becc95ad1c56e721c90ddfc6a8c409 (diff)
parente71b75f73763d88665b3a19c5a4d52d559aa7732 (diff)
Merge branch 'mlx5-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux
Saeed Mahameed says: ==================== mlx5-next 2021-04-09 This pr contains changes from mlx5-next branch, already reviewed on netdev and rdma mailing lists, links below. 1) From Leon, Dynamically assign MSI-X vectors count Already Acked by Bjorn Helgaas. https://patchwork.kernel.org/project/netdevbpf/cover/20210314124256.70253-1-leon@kernel.org/ 2) Cleanup series: https://patchwork.kernel.org/project/netdevbpf/cover/20210311070915.321814-1-saeed@kernel.org/ From Mark, E-Switch cleanups and refactoring, and the addition of single FDB mode needed HW bits. From Mikhael, Remove unused struct field From Saeed, Cleanup W=1 prototype warning From Zheng, Esw related cleanup From Tariq, User order-0 page allocation for EQs * 'mlx5-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux: net/mlx5: Implement sriov_get_vf_total_msix/count() callbacks net/mlx5: Dynamically assign MSI-X vectors count net/mlx5: Add dynamic MSI-X capabilities bits PCI/IOV: Add sysfs MSI-X vector assignment interface net/mlx5: Use order-0 allocations for EQs net/mlx5: Add IFC bits needed for single FDB mode net/mlx5: E-Switch, Refactor send to vport to be more generic RDMA/mlx5: Use representor E-Switch when getting netdev and metadata net/mlx5: E-Switch, Add eswitch pointer to each representor net/mlx5: E-Switch, Add match on vhca id to default send rules net/mlx5: Remove unused mlx5_core_health member recover_work net/mlx5: simplify the return expression of mlx5_esw_offloads_pair() net/mlx5: Cleanup prototype warning ==================== Link: https://lore.kernel.org/r/20210409200704.10886-1-saeed@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/iov.c102
-rw-r--r--drivers/pci/pci-sysfs.c3
-rw-r--r--drivers/pci/pci.h3
3 files changed, 100 insertions, 8 deletions
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 4afd4ee4f7f0..afc06e6ce115 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -31,6 +31,7 @@ int pci_iov_virtfn_devfn(struct pci_dev *dev, int vf_id)
return (dev->devfn + dev->sriov->offset +
dev->sriov->stride * vf_id) & 0xff;
}
+EXPORT_SYMBOL_GPL(pci_iov_virtfn_devfn);
/*
* Per SR-IOV spec sec 3.3.10 and 3.3.11, First VF Offset and VF Stride may
@@ -157,6 +158,92 @@ failed:
return rc;
}
+#ifdef CONFIG_PCI_MSI
+static ssize_t sriov_vf_total_msix_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ u32 vf_total_msix = 0;
+
+ device_lock(dev);
+ if (!pdev->driver || !pdev->driver->sriov_get_vf_total_msix)
+ goto unlock;
+
+ vf_total_msix = pdev->driver->sriov_get_vf_total_msix(pdev);
+unlock:
+ device_unlock(dev);
+ return sysfs_emit(buf, "%u\n", vf_total_msix);
+}
+static DEVICE_ATTR_RO(sriov_vf_total_msix);
+
+static ssize_t sriov_vf_msix_count_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct pci_dev *vf_dev = to_pci_dev(dev);
+ struct pci_dev *pdev = pci_physfn(vf_dev);
+ int val, ret;
+
+ ret = kstrtoint(buf, 0, &val);
+ if (ret)
+ return ret;
+
+ if (val < 0)
+ return -EINVAL;
+
+ device_lock(&pdev->dev);
+ if (!pdev->driver || !pdev->driver->sriov_set_msix_vec_count) {
+ ret = -EOPNOTSUPP;
+ goto err_pdev;
+ }
+
+ device_lock(&vf_dev->dev);
+ if (vf_dev->driver) {
+ /*
+ * A driver is already attached to this VF and has configured
+ * itself based on the current MSI-X vector count. Changing
+ * the vector size could mess up the driver, so block it.
+ */
+ ret = -EBUSY;
+ goto err_dev;
+ }
+
+ ret = pdev->driver->sriov_set_msix_vec_count(vf_dev, val);
+
+err_dev:
+ device_unlock(&vf_dev->dev);
+err_pdev:
+ device_unlock(&pdev->dev);
+ return ret ? : count;
+}
+static DEVICE_ATTR_WO(sriov_vf_msix_count);
+#endif
+
+static struct attribute *sriov_vf_dev_attrs[] = {
+#ifdef CONFIG_PCI_MSI
+ &dev_attr_sriov_vf_msix_count.attr,
+#endif
+ NULL,
+};
+
+static umode_t sriov_vf_attrs_are_visible(struct kobject *kobj,
+ struct attribute *a, int n)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ if (!pdev->is_virtfn)
+ return 0;
+
+ return a->mode;
+}
+
+const struct attribute_group sriov_vf_dev_attr_group = {
+ .attrs = sriov_vf_dev_attrs,
+ .is_visible = sriov_vf_attrs_are_visible,
+};
+
int pci_iov_add_virtfn(struct pci_dev *dev, int id)
{
int i;
@@ -400,18 +487,21 @@ static DEVICE_ATTR_RO(sriov_stride);
static DEVICE_ATTR_RO(sriov_vf_device);
static DEVICE_ATTR_RW(sriov_drivers_autoprobe);
-static struct attribute *sriov_dev_attrs[] = {
+static struct attribute *sriov_pf_dev_attrs[] = {
&dev_attr_sriov_totalvfs.attr,
&dev_attr_sriov_numvfs.attr,
&dev_attr_sriov_offset.attr,
&dev_attr_sriov_stride.attr,
&dev_attr_sriov_vf_device.attr,
&dev_attr_sriov_drivers_autoprobe.attr,
+#ifdef CONFIG_PCI_MSI
+ &dev_attr_sriov_vf_total_msix.attr,
+#endif
NULL,
};
-static umode_t sriov_attrs_are_visible(struct kobject *kobj,
- struct attribute *a, int n)
+static umode_t sriov_pf_attrs_are_visible(struct kobject *kobj,
+ struct attribute *a, int n)
{
struct device *dev = kobj_to_dev(kobj);
@@ -421,9 +511,9 @@ static umode_t sriov_attrs_are_visible(struct kobject *kobj,
return a->mode;
}
-const struct attribute_group sriov_dev_attr_group = {
- .attrs = sriov_dev_attrs,
- .is_visible = sriov_attrs_are_visible,
+const struct attribute_group sriov_pf_dev_attr_group = {
+ .attrs = sriov_pf_dev_attrs,
+ .is_visible = sriov_pf_attrs_are_visible,
};
int __weak pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index f8afd54ca3e1..a6b8fbbba6d2 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1567,7 +1567,8 @@ static const struct attribute_group *pci_dev_attr_groups[] = {
&pci_dev_attr_group,
&pci_dev_hp_attr_group,
#ifdef CONFIG_PCI_IOV
- &sriov_dev_attr_group,
+ &sriov_pf_dev_attr_group,
+ &sriov_vf_dev_attr_group,
#endif
&pci_bridge_attr_group,
&pcie_dev_attr_group,
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index ef7c4661314f..afb87b917f07 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -501,7 +501,8 @@ void pci_iov_update_resource(struct pci_dev *dev, int resno);
resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
void pci_restore_iov_state(struct pci_dev *dev);
int pci_iov_bus_range(struct pci_bus *bus);
-extern const struct attribute_group sriov_dev_attr_group;
+extern const struct attribute_group sriov_pf_dev_attr_group;
+extern const struct attribute_group sriov_vf_dev_attr_group;
#else
static inline int pci_iov_init(struct pci_dev *dev)
{