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freebsd-dev/sys/dev/pci/pci_private.h
John Baldwin 3d0338a092 Implement a PCI bus rescan method. 
Rescanning a PCI bus uses the following steps:
- Fetch the current set of child devices and save it in the 'devlist'
  array.
- Allocate a parallel array 'unchanged' initalized with NULL pointers.
- Scan the bus checking each slot (and each function on slots with a
  multifunction device).
- If a valid function is found, look for a matching device in the 'devlist'
  array.  If a device is found, save the pointer in the 'unchanged' array.
  If a device is not found, add a new device.
- After the scan has finished, walk the 'devlist' array deleting any
  devices that do not have a matching pointer in the 'unchanged' array.
- Finally, fetch an updated set of child devices and explicitly attach any
  devices that are not present in the 'unchanged' array.

This builds on the previous changes to move subclass data management into
pci_alloc_devinfo(), pci_child_added(), and bus_child_deleted().

Subclasses of the PCI bus use custom rescan logic explicitly override the
rescan method to disable rescans.

Differential Revision:	https://reviews.freebsd.org/D6018
2016-04-27 16:31:12 +00:00

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/*-
* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
* Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
* Copyright (c) 2000, BSDi
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*
*/
#ifndef _PCI_PRIVATE_H_
#define _PCI_PRIVATE_H_
/*
* Export definitions of the pci bus so that we can more easily share
* it with "subclass" busses.
*/
DECLARE_CLASS(pci_driver);
struct pci_softc {
bus_dma_tag_t sc_dma_tag;
#ifdef PCI_RES_BUS
struct resource *sc_bus;
#endif
};
extern int pci_do_power_resume;
extern int pci_do_power_suspend;
void pci_add_children(device_t dev, int domain, int busno);
void pci_add_child(device_t bus, struct pci_devinfo *dinfo);
device_t pci_add_iov_child(device_t bus, device_t pf, uint16_t rid,
uint16_t vid, uint16_t did);
void pci_add_resources(device_t bus, device_t dev, int force,
uint32_t prefetchmask);
void pci_add_resources_ea(device_t bus, device_t dev, int alloc_iov);
struct pci_devinfo *pci_alloc_devinfo_method(device_t dev);
int pci_attach_common(device_t dev);
int pci_rescan_method(device_t dev);
void pci_driver_added(device_t dev, driver_t *driver);
int pci_ea_is_enabled(device_t dev, int rid);
int pci_print_child(device_t dev, device_t child);
void pci_probe_nomatch(device_t dev, device_t child);
int pci_read_ivar(device_t dev, device_t child, int which,
uintptr_t *result);
int pci_write_ivar(device_t dev, device_t child, int which,
uintptr_t value);
int pci_setup_intr(device_t dev, device_t child,
struct resource *irq, int flags, driver_filter_t *filter,
driver_intr_t *intr, void *arg, void **cookiep);
int pci_teardown_intr(device_t dev, device_t child,
struct resource *irq, void *cookie);
int pci_get_vpd_ident_method(device_t dev, device_t child,
const char **identptr);
int pci_get_vpd_readonly_method(device_t dev, device_t child,
const char *kw, const char **vptr);
int pci_set_powerstate_method(device_t dev, device_t child,
int state);
int pci_get_powerstate_method(device_t dev, device_t child);
uint32_t pci_read_config_method(device_t dev, device_t child,
int reg, int width);
void pci_write_config_method(device_t dev, device_t child,
int reg, uint32_t val, int width);
int pci_enable_busmaster_method(device_t dev, device_t child);
int pci_disable_busmaster_method(device_t dev, device_t child);
int pci_enable_io_method(device_t dev, device_t child, int space);
int pci_disable_io_method(device_t dev, device_t child, int space);
int pci_find_cap_method(device_t dev, device_t child,
int capability, int *capreg);
int pci_find_extcap_method(device_t dev, device_t child,
int capability, int *capreg);
int pci_find_htcap_method(device_t dev, device_t child,
int capability, int *capreg);
int pci_alloc_msi_method(device_t dev, device_t child, int *count);
int pci_alloc_msix_method(device_t dev, device_t child, int *count);
void pci_enable_msi_method(device_t dev, device_t child,
uint64_t address, uint16_t data);
void pci_enable_msix_method(device_t dev, device_t child,
u_int index, uint64_t address, uint32_t data);
void pci_disable_msi_method(device_t dev, device_t child);
int pci_remap_msix_method(device_t dev, device_t child,
int count, const u_int *vectors);
int pci_release_msi_method(device_t dev, device_t child);
int pci_msi_count_method(device_t dev, device_t child);
int pci_msix_count_method(device_t dev, device_t child);
int pci_msix_pba_bar_method(device_t dev, device_t child);
int pci_msix_table_bar_method(device_t dev, device_t child);
struct resource *pci_alloc_resource(device_t dev, device_t child,
int type, int *rid, rman_res_t start, rman_res_t end,
rman_res_t count, u_int flags);
int pci_release_resource(device_t dev, device_t child, int type,
int rid, struct resource *r);
int pci_activate_resource(device_t dev, device_t child, int type,
int rid, struct resource *r);
int pci_deactivate_resource(device_t dev, device_t child, int type,
int rid, struct resource *r);
void pci_delete_resource(device_t dev, device_t child,
int type, int rid);
struct resource_list *pci_get_resource_list (device_t dev, device_t child);
struct pci_devinfo *pci_read_device(device_t pcib, device_t bus, int d, int b,
int s, int f);
void pci_print_verbose(struct pci_devinfo *dinfo);
int pci_freecfg(struct pci_devinfo *dinfo);
void pci_child_deleted(device_t dev, device_t child);
void pci_child_detached(device_t dev, device_t child);
int pci_child_location_str_method(device_t cbdev, device_t child,
char *buf, size_t buflen);
int pci_child_pnpinfo_str_method(device_t cbdev, device_t child,
char *buf, size_t buflen);
int pci_assign_interrupt_method(device_t dev, device_t child);
int pci_resume(device_t dev);
int pci_resume_child(device_t dev, device_t child);
int pci_suspend_child(device_t dev, device_t child);
bus_dma_tag_t pci_get_dma_tag(device_t bus, device_t dev);
void pci_child_added_method(device_t dev, device_t child);
/** Restore the config register state. The state must be previously
* saved with pci_cfg_save. However, the pci bus driver takes care of
* that. This function will also return the device to PCI_POWERSTATE_D0
* if it is currently in a lower power mode.
*/
void pci_cfg_restore(device_t, struct pci_devinfo *);
/** Save the config register state. Optionally set the power state to D3
* if the third argument is non-zero.
*/
void pci_cfg_save(device_t, struct pci_devinfo *, int);
int pci_mapsize(uint64_t testval);
void pci_read_bar(device_t dev, int reg, pci_addr_t *mapp,
pci_addr_t *testvalp, int *bar64);
struct pci_map *pci_add_bar(device_t dev, int reg, pci_addr_t value,
pci_addr_t size);
struct resource *pci_alloc_multi_resource(device_t dev, device_t child,
int type, int *rid, rman_res_t start, rman_res_t end,
rman_res_t count, u_long num, u_int flags);
int pci_iov_attach_method(device_t bus, device_t dev,
struct nvlist *pf_schema, struct nvlist *vf_schema);
int pci_iov_detach_method(device_t bus, device_t dev);
device_t pci_create_iov_child_method(device_t bus, device_t pf,
uint16_t rid, uint16_t vid, uint16_t did);
struct resource *pci_vf_alloc_mem_resource(device_t dev, device_t child,
int *rid, rman_res_t start, rman_res_t end,
rman_res_t count, u_int flags);
int pci_vf_release_mem_resource(device_t dev, device_t child,
int rid, struct resource *r);
#endif /* _PCI_PRIVATE_H_ */
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