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xen/pciback: Drop two backends, squash and cleanup some code.

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- Remove the slot and controller controller backend as they
   are not used.
 - Document the find pciback_[read|write]_config_[byte|word|dword]
   to make it easier to find.
 - Collapse the code from conf_space_capability_msi into pciback_ops.c
 - Collapse conf_space_capability_[pm|vpd].c in conf_space_capability.c
   [and remove the conf_space_capability.h file]
 - Rename all visible functions from pciback to xen_pcibk.
 - Rename all the printk/pr_info, etc that use the "pciback" to say
   "xen-pciback".
 - Convert functions that are not referenced outside the code to be
   static to save on name space.
 - Do the same thing for structures that are internal to the driver.
 - Run checkpatch.pl after the renames and fixup its warnings and
   fix any compile errors caused by the variable rename
 - Cleanup any structs that checkpath.pl commented about or just
   look odd.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Konrad Rzeszutek Wilk
2011-07-19 19:40:51 -04:00
parent c288b67b9b
commit a92336a117
19 changed files with 679 additions and 1369 deletions
Download Patch File Download Diff File Expand all files Collapse all files

107
drivers/xen/xen-pciback/pciback.h
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@@ -25,25 +25,19 @@ struct pci_dev_entry {
#define _PCIB_op_pending (1)
#define PCIB_op_pending (1<<(_PCIB_op_pending))
struct pciback_device {
struct xen_pcibk_device {
void *pci_dev_data;
spinlock_t dev_lock;
struct xenbus_device *xdev;
struct xenbus_watch be_watch;
u8 be_watching;
int evtchn_irq;
struct xen_pci_sharedinfo *sh_info;
unsigned long flags;
struct work_struct op_work;
};
struct pciback_dev_data {
struct xen_pcibk_dev_data {
struct list_head config_fields;
unsigned int permissive:1;
unsigned int warned_on_write:1;
@@ -52,91 +46,78 @@ struct pciback_dev_data {
unsigned int ack_intr:1; /* .. and ACK-ing */
unsigned long handled;
unsigned int irq; /* Saved in case device transitions to MSI/MSI-X */
char irq_name[0]; /* pciback[000:04:00.0] */
char irq_name[0]; /* xen-pcibk[000:04:00.0] */
};
/* Used by XenBus and pciback_ops.c */
extern wait_queue_head_t aer_wait_queue;
extern struct workqueue_struct *pciback_wq;
/* Used by XenBus and xen_pcibk_ops.c */
extern wait_queue_head_t xen_pcibk_aer_wait_queue;
extern struct workqueue_struct *xen_pcibk_wq;
/* Used by pcistub.c and conf_space_quirks.c */
extern struct list_head pciback_quirks;
extern struct list_head xen_pcibk_quirks;
/* Get/Put PCI Devices that are hidden from the PCI Backend Domain */
struct pci_dev *pcistub_get_pci_dev_by_slot(struct pciback_device *pdev,
struct pci_dev *pcistub_get_pci_dev_by_slot(struct xen_pcibk_device *pdev,
int domain, int bus,
int slot, int func);
struct pci_dev *pcistub_get_pci_dev(struct pciback_device *pdev,
struct pci_dev *pcistub_get_pci_dev(struct xen_pcibk_device *pdev,
struct pci_dev *dev);
void pcistub_put_pci_dev(struct pci_dev *dev);
/* Ensure a device is turned off or reset */
void pciback_reset_device(struct pci_dev *pdev);
void xen_pcibk_reset_device(struct pci_dev *pdev);
/* Access a virtual configuration space for a PCI device */
int pciback_config_init(void);
int pciback_config_init_dev(struct pci_dev *dev);
void pciback_config_free_dyn_fields(struct pci_dev *dev);
void pciback_config_reset_dev(struct pci_dev *dev);
void pciback_config_free_dev(struct pci_dev *dev);
int pciback_config_read(struct pci_dev *dev, int offset, int size,
u32 *ret_val);
int pciback_config_write(struct pci_dev *dev, int offset, int size, u32 value);
int xen_pcibk_config_init(void);
int xen_pcibk_config_init_dev(struct pci_dev *dev);
void xen_pcibk_config_free_dyn_fields(struct pci_dev *dev);
void xen_pcibk_config_reset_dev(struct pci_dev *dev);
void xen_pcibk_config_free_dev(struct pci_dev *dev);
int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
u32 *ret_val);
int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size,
u32 value);
/* Handle requests for specific devices from the frontend */
typedef int (*publish_pci_dev_cb) (struct pciback_device *pdev,
typedef int (*publish_pci_dev_cb) (struct xen_pcibk_device *pdev,
unsigned int domain, unsigned int bus,
unsigned int devfn, unsigned int devid);
typedef int (*publish_pci_root_cb) (struct pciback_device *pdev,
typedef int (*publish_pci_root_cb) (struct xen_pcibk_device *pdev,
unsigned int domain, unsigned int bus);
int pciback_add_pci_dev(struct pciback_device *pdev, struct pci_dev *dev,
int devid, publish_pci_dev_cb publish_cb);
void pciback_release_pci_dev(struct pciback_device *pdev, struct pci_dev *dev);
struct pci_dev *pciback_get_pci_dev(struct pciback_device *pdev,
unsigned int domain, unsigned int bus,
unsigned int devfn);
int xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev, struct pci_dev *dev,
int devid, publish_pci_dev_cb publish_cb);
void xen_pcibk_release_pci_dev(struct xen_pcibk_device *pdev,
struct pci_dev *dev);
struct pci_dev *xen_pcibk_get_pci_dev(struct xen_pcibk_device *pdev,
unsigned int domain, unsigned int bus,
unsigned int devfn);
/**
* Add for domain0 PCIE-AER handling. Get guest domain/bus/devfn in pciback
* Add for domain0 PCIE-AER handling. Get guest domain/bus/devfn in xen_pcibk
* before sending aer request to pcifront, so that guest could identify
* device, coopearte with pciback to finish aer recovery job if device driver
* device, coopearte with xen_pcibk to finish aer recovery job if device driver
* has the capability
*/
int pciback_get_pcifront_dev(struct pci_dev *pcidev,
struct pciback_device *pdev,
unsigned int *domain, unsigned int *bus,
unsigned int *devfn);
int pciback_init_devices(struct pciback_device *pdev);
int pciback_publish_pci_roots(struct pciback_device *pdev,
publish_pci_root_cb cb);
void pciback_release_devices(struct pciback_device *pdev);
int xen_pcibk_get_pcifront_dev(struct pci_dev *pcidev,
struct xen_pcibk_device *pdev,
unsigned int *domain, unsigned int *bus,
unsigned int *devfn);
int xen_pcibk_init_devices(struct xen_pcibk_device *pdev);
int xen_pcibk_publish_pci_roots(struct xen_pcibk_device *pdev,
publish_pci_root_cb cb);
void xen_pcibk_release_devices(struct xen_pcibk_device *pdev);
/* Handles events from front-end */
irqreturn_t pciback_handle_event(int irq, void *dev_id);
void pciback_do_op(struct work_struct *data);
irqreturn_t xen_pcibk_handle_event(int irq, void *dev_id);
void xen_pcibk_do_op(struct work_struct *data);
int pciback_xenbus_register(void);
void pciback_xenbus_unregister(void);
int xen_pcibk_xenbus_register(void);
void xen_pcibk_xenbus_unregister(void);
#ifdef CONFIG_PCI_MSI
int pciback_enable_msi(struct pciback_device *pdev,
struct pci_dev *dev, struct xen_pci_op *op);
int pciback_disable_msi(struct pciback_device *pdev,
struct pci_dev *dev, struct xen_pci_op *op);
int pciback_enable_msix(struct pciback_device *pdev,
struct pci_dev *dev, struct xen_pci_op *op);
int pciback_disable_msix(struct pciback_device *pdev,
struct pci_dev *dev, struct xen_pci_op *op);
#endif
extern int verbose_request;
void test_and_schedule_op(struct pciback_device *pdev);
void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev);
#endif
/* Handles shared IRQs that can to device domain and control domain. */
void pciback_irq_handler(struct pci_dev *dev, int reset);
irqreturn_t pciback_guest_interrupt(int irq, void *dev_id);
void xen_pcibk_irq_handler(struct pci_dev *dev, int reset);