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Commit 6b136724 authored by Bjorn Helgaas's avatar Bjorn Helgaas
Browse files

PCI: Use spec names for SR-IOV capability fields 



Use the same names (almost) as the spec for TotalVFs, InitialVFs, NumVFs.

Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent bff73156

drivers/pci/iov.c

+24 −24
Original line number Diff line number Diff line
@@ -106,7 +106,7 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset) 
		virtfn->resource[i].name = pci_name(virtfn);

		virtfn->resource[i].flags = res->flags;

		size = resource_size(res);

		do_div(size, iov->total);

		do_div(size, iov->total_VFs);

		virtfn->resource[i].start = res->start + size * id;

		virtfn->resource[i].end = virtfn->resource[i].start + size - 1;

		rc = request_resource(res, &virtfn->resource[i]);
@@ -194,7 +194,7 @@ static int sriov_migration(struct pci_dev *dev) 
	u16 status;

	struct pci_sriov *iov = dev->sriov;



	if (!iov->nr_virtfn)

	if (!iov->num_VFs)

		return 0;



	if (!(iov->cap & PCI_SRIOV_CAP_VFM))
@@ -216,7 +216,7 @@ static void sriov_migration_task(struct work_struct *work) 
	u16 status;

	struct pci_sriov *iov = container_of(work, struct pci_sriov, mtask);



	for (i = iov->initial; i < iov->nr_virtfn; i++) {

	for (i = iov->initial_VFs; i < iov->num_VFs; i++) {

		state = readb(iov->mstate + i);

		if (state == PCI_SRIOV_VFM_MI) {

			writeb(PCI_SRIOV_VFM_AV, iov->mstate + i);
@@ -244,7 +244,7 @@ static int sriov_enable_migration(struct pci_dev *dev, int nr_virtfn) 
	resource_size_t pa;

	struct pci_sriov *iov = dev->sriov;



	if (nr_virtfn <= iov->initial)

	if (nr_virtfn <= iov->initial_VFs)

		return 0;



	pci_read_config_dword(dev, iov->pos + PCI_SRIOV_VFM, &table);
@@ -294,15 +294,15 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) 
	if (!nr_virtfn)

		return 0;



	if (iov->nr_virtfn)

	if (iov->num_VFs)

		return -EINVAL;



	pci_read_config_word(dev, iov->pos + PCI_SRIOV_INITIAL_VF, &initial);

	if (initial > iov->total ||

	    (!(iov->cap & PCI_SRIOV_CAP_VFM) && (initial != iov->total)))

	if (initial > iov->total_VFs ||

	    (!(iov->cap & PCI_SRIOV_CAP_VFM) && (initial != iov->total_VFs)))

		return -EIO;



	if (nr_virtfn < 0 || nr_virtfn > iov->total ||

	if (nr_virtfn < 0 || nr_virtfn > iov->total_VFs ||

	    (!(iov->cap & PCI_SRIOV_CAP_VFM) && (nr_virtfn > initial)))

		return -EINVAL;
@@ -359,7 +359,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) 
	msleep(100);

	pci_cfg_access_unlock(dev);



	iov->initial = initial;

	iov->initial_VFs = initial;

	if (nr_virtfn < initial)

		initial = nr_virtfn;
@@ -376,7 +376,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) 
	}



	kobject_uevent(&dev->dev.kobj, KOBJ_CHANGE);

	iov->nr_virtfn = nr_virtfn;

	iov->num_VFs = nr_virtfn;



	return 0;
@@ -401,13 +401,13 @@ static void sriov_disable(struct pci_dev *dev) 
	int i;

	struct pci_sriov *iov = dev->sriov;



	if (!iov->nr_virtfn)

	if (!iov->num_VFs)

		return;



	if (iov->cap & PCI_SRIOV_CAP_VFM)

		sriov_disable_migration(dev);



	for (i = 0; i < iov->nr_virtfn; i++)

	for (i = 0; i < iov->num_VFs; i++)

		virtfn_remove(dev, i, 0);



	iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
@@ -419,7 +419,7 @@ static void sriov_disable(struct pci_dev *dev) 
	if (iov->link != dev->devfn)

		sysfs_remove_link(&dev->dev.kobj, "dep_link");



	iov->nr_virtfn = 0;

	iov->num_VFs = 0;

}



static int sriov_init(struct pci_dev *dev, int pos)
@@ -496,7 +496,7 @@ static int sriov_init(struct pci_dev *dev, int pos) 
	iov->pos = pos;

	iov->nres = nres;

	iov->ctrl = ctrl;

	iov->total = total;

	iov->total_VFs = total;

	iov->offset = offset;

	iov->stride = stride;

	iov->pgsz = pgsz;
@@ -529,7 +529,7 @@ static int sriov_init(struct pci_dev *dev, int pos) 


static void sriov_release(struct pci_dev *dev)

{

	BUG_ON(dev->sriov->nr_virtfn);

	BUG_ON(dev->sriov->num_VFs);



	if (dev != dev->sriov->dev)

		pci_dev_put(dev->sriov->dev);
@@ -554,7 +554,7 @@ static void sriov_restore_state(struct pci_dev *dev) 
		pci_update_resource(dev, i);



	pci_write_config_dword(dev, iov->pos + PCI_SRIOV_SYS_PGSIZE, iov->pgsz);

	pci_write_config_word(dev, iov->pos + PCI_SRIOV_NUM_VF, iov->nr_virtfn);

	pci_write_config_word(dev, iov->pos + PCI_SRIOV_NUM_VF, iov->num_VFs);

	pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);

	if (iov->ctrl & PCI_SRIOV_CTRL_VFE)

		msleep(100);
@@ -661,7 +661,7 @@ int pci_iov_bus_range(struct pci_bus *bus) 
	list_for_each_entry(dev, &bus->devices, bus_list) {

		if (!dev->is_physfn)

			continue;

		busnr = virtfn_bus(dev, dev->sriov->total - 1);

		busnr = virtfn_bus(dev, dev->sriov->total_VFs - 1);

		if (busnr > max)

			max = busnr;

	}
@@ -732,7 +732,7 @@ int pci_num_vf(struct pci_dev *dev) 
	if (!dev || !dev->is_physfn)

		return 0;

	else

		return dev->sriov->nr_virtfn;

		return dev->sriov->num_VFs;

}

EXPORT_SYMBOL_GPL(pci_num_vf);
@@ -750,14 +750,14 @@ EXPORT_SYMBOL_GPL(pci_num_vf); 
 */

int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)

{

	if (!dev || !dev->is_physfn || (numvfs > dev->sriov->total))

	if (!dev || !dev->is_physfn || (numvfs > dev->sriov->total_VFs))

		return -EINVAL;



	/* Shouldn't change if VFs already enabled */

	if (dev->sriov->ctrl & PCI_SRIOV_CTRL_VFE)

		return -EBUSY;

	else

		dev->sriov->drvttl = numvfs;

		dev->sriov->driver_max_VFs = numvfs;



	return 0;

}
@@ -768,7 +768,7 @@ EXPORT_SYMBOL_GPL(pci_sriov_set_totalvfs); 
 * @dev: the PCI PF device

 *

 * For a PCIe device with SRIOV support, return the PCIe

 * SRIOV capability value of TotalVFs or the value of drvttl

 * SRIOV capability value of TotalVFs or the value of driver_max_VFs

 * if the driver reduced it.  Otherwise, -EINVAL.

 */

int pci_sriov_get_totalvfs(struct pci_dev *dev)
@@ -776,9 +776,9 @@ int pci_sriov_get_totalvfs(struct pci_dev *dev) 
	if (!dev || !dev->is_physfn)

		return -EINVAL;



	if (dev->sriov->drvttl)

		return dev->sriov->drvttl;

	if (dev->sriov->driver_max_VFs)

		return dev->sriov->driver_max_VFs;

	else

		return dev->sriov->total;

		return dev->sriov->total_VFs;

}

EXPORT_SYMBOL_GPL(pci_sriov_get_totalvfs);

drivers/pci/pci-sysfs.c

+5 −5
Original line number Diff line number Diff line
@@ -421,7 +421,7 @@ static ssize_t sriov_numvfs_show(struct device *dev, 
{

	struct pci_dev *pdev = to_pci_dev(dev);



	return sprintf(buf, "%u\n", pdev->sriov->nr_virtfn);

	return sprintf(buf, "%u\n", pdev->sriov->num_VFs);

}



/*
@@ -455,7 +455,7 @@ static ssize_t sriov_numvfs_store(struct device *dev, 
	total = pci_sriov_get_totalvfs(pdev);

	/* Requested VFs to enable < totalvfs and none enabled already */

	if ((num_vfs > 0) && (num_vfs <= total)) {

		if (pdev->sriov->nr_virtfn == 0) {

		if (pdev->sriov->num_VFs == 0) {

			num_vfs_enabled =

				pdev->driver->sriov_configure(pdev, num_vfs);

			if ((num_vfs_enabled >= 0) &&
@@ -467,7 +467,7 @@ static ssize_t sriov_numvfs_store(struct device *dev, 
			} else if (num_vfs_enabled < 0)

				/* error code from driver callback */

				return num_vfs_enabled;

		} else if (num_vfs == pdev->sriov->nr_virtfn) {

		} else if (num_vfs == pdev->sriov->num_VFs) {

			dev_warn(&pdev->dev,

				 "%d VFs already enabled; no enable action taken\n",

				 num_vfs);
@@ -475,14 +475,14 @@ static ssize_t sriov_numvfs_store(struct device *dev, 
		} else {

			dev_warn(&pdev->dev,

				 "%d VFs already enabled. Disable before enabling %d VFs\n",

				 pdev->sriov->nr_virtfn, num_vfs);

				 pdev->sriov->num_VFs, num_vfs);

			return -EINVAL;

		}

	}



	/* disable vfs */

	if (num_vfs == 0) {

		if (pdev->sriov->nr_virtfn != 0) {

		if (pdev->sriov->num_VFs != 0) {

			ret = pdev->driver->sriov_configure(pdev, 0);

			return ret ? ret : count;

		} else {

drivers/pci/pci.h

+4 −4
Original line number Diff line number Diff line
@@ -233,14 +233,14 @@ struct pci_sriov { 
	int nres;		/* number of resources */

	u32 cap;		/* SR-IOV Capabilities */

	u16 ctrl;		/* SR-IOV Control */

	u16 total;		/* total VFs associated with the PF */

	u16 initial;		/* initial VFs associated with the PF */

	u16 nr_virtfn;		/* number of VFs available */

	u16 total_VFs;		/* total VFs associated with the PF */

	u16 initial_VFs;	/* initial VFs associated with the PF */

	u16 num_VFs;		/* number of VFs available */

	u16 offset;		/* first VF Routing ID offset */

	u16 stride;		/* following VF stride */

	u32 pgsz;		/* page size for BAR alignment */

	u8 link;		/* Function Dependency Link */

	u16 drvttl;		/* max num VFs driver supports */

	u16 driver_max_VFs;	/* max num VFs driver supports */

	struct pci_dev *dev;	/* lowest numbered PF */

	struct pci_dev *self;	/* this PF */

	struct mutex lock;	/* lock for VF bus */