leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

PCI: Remove pci_resource_bar() and pci_iov_resource_bar()

Browse Source 
pci_std_update_resource() only deals with standard BARs, so we don't have
to worry about the complications of VF BARs in an SR-IOV capability.

Compute the BAR address inline and remove pci_resource_bar().  That makes
pci_iov_resource_bar() unused, so remove that as well.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
This commit is contained in:
Bjorn Helgaas 2016-11-28 16:51:19 -06:00
parent 546ba9f8f2
commit 286c2378aa
4 changed files with 7 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/pci/iov.c
View File

@ -553,24 +553,6 @@ void pci_iov_release(struct pci_dev *dev)
sriov_release(dev);
}
/**
* pci_iov_resource_bar - get position of the SR-IOV BAR
* @dev: the PCI device
* @resno: the resource number
*
* Returns position of the BAR encapsulated in the SR-IOV capability.
*/
int pci_iov_resource_bar(struct pci_dev *dev, int resno)
{
if (resno < PCI_IOV_RESOURCES || resno > PCI_IOV_RESOURCE_END)
return 0;
BUG_ON(!dev->is_physfn);
return dev->sriov->pos + PCI_SRIOV_BAR +
4 * (resno - PCI_IOV_RESOURCES);
}
/**
* pci_iov_update_resource - update a VF BAR
* @dev: the PCI device

30
drivers/pci/pci.c
View File

@ -4827,36 +4827,6 @@ int pci_select_bars(struct pci_dev *dev, unsigned long flags)
}
EXPORT_SYMBOL(pci_select_bars);
/**
* pci_resource_bar - get position of the BAR associated with a resource
* @dev: the PCI device
* @resno: the resource number
* @type: the BAR type to be filled in
*
* Returns BAR position in config space, or 0 if the BAR is invalid.
*/
int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type)
{
int reg;
if (resno < PCI_ROM_RESOURCE) {
*type = pci_bar_unknown;
return PCI_BASE_ADDRESS_0 + 4 * resno;
} else if (resno == PCI_ROM_RESOURCE) {
*type = pci_bar_mem32;
return dev->rom_base_reg;
} else if (resno < PCI_BRIDGE_RESOURCES) {
/* device specific resource */
*type = pci_bar_unknown;
reg = pci_iov_resource_bar(dev, resno);
if (reg)
return reg;
}
dev_err(&dev->dev, "BAR %d: invalid resource\n", resno);
return 0;
}
/* Some architectures require additional programming to enable VGA */
static arch_set_vga_state_t arch_set_vga_state;

6
drivers/pci/pci.h
View File

@ -245,7 +245,6 @@ bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
int pci_setup_device(struct pci_dev *dev);
int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
struct resource *res, unsigned int reg);
int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type);
void pci_configure_ari(struct pci_dev *dev);
void __pci_bus_size_bridges(struct pci_bus *bus,
struct list_head *realloc_head);
@ -289,7 +288,6 @@ static inline void pci_restore_ats_state(struct pci_dev *dev)
#ifdef CONFIG_PCI_IOV
int pci_iov_init(struct pci_dev *dev);
void pci_iov_release(struct pci_dev *dev);
int pci_iov_resource_bar(struct pci_dev *dev, int resno);
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);
@ -304,10 +302,6 @@ static inline void pci_iov_release(struct pci_dev *dev)
{
}
static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno)
{
return 0;
}
static inline void pci_restore_iov_state(struct pci_dev *dev)
{
}

13
drivers/pci/setup-res.c
View File

@ -32,7 +32,6 @@ static void pci_std_update_resource(struct pci_dev *dev, int resno)
u16 cmd;
u32 new, check, mask;
int reg;
enum pci_bar_type type;
struct resource *res = dev->resource + resno;
/* Per SR-IOV spec 3.4.1.11, VF BARs are RO zero */
@ -70,14 +69,16 @@ static void pci_std_update_resource(struct pci_dev *dev, int resno)
new |= res->flags & ~PCI_BASE_ADDRESS_MEM_MASK;
}
reg = pci_resource_bar(dev, resno, &type);
if (!reg)
return;
if (type != pci_bar_unknown) {
if (resno < PCI_ROM_RESOURCE) {
reg = PCI_BASE_ADDRESS_0 + 4 * resno;
} else if (resno == PCI_ROM_RESOURCE) {
if (!(res->flags & IORESOURCE_ROM_ENABLE))
return;
reg = dev->rom_base_reg;
new |= PCI_ROM_ADDRESS_ENABLE;
}
} else
return;
/*
* We can't update a 64-bit BAR atomically, so when possible,