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freebsd-nq/sys/dev/pci/pcib_private.h
John Baldwin 1ffd07bde6 Various fixes for PCI _OSC handling so HotPlug works again. 
- Rename the default implementation of 'pcib_request_feature' and add
  a pcib_request_feature() wrapper function (as is often done for
  new-bus APIs implemented via kobj) that accepts a single function.
  Previously the call to pcib_request_feature() ended up invoking the
  method on the great-great-grandparent of the bridge device instead
  of the grandparent.  For a bridge that was a direct child of pci0 on
  x86 this resulted in the method skipping over the Host-PCI bridge
  driver and being invoked against nexus0
- When invoking _OSC from a Host-PCI bridge driver, invoke
  device_get_softc() against the Host-PCI bridge device instead of the
  child bridge that is requesting HotPlug.  Using the wrong softc data
  resulted in garbage being passed for the ACPI handle causing the
  _OSC call to fail.
- While here, perform some other cleanups to _OSC handling in the ACPI
  Host-PCI bridge driver:
  - Don't invoke _OSC when requesting a control that has already been
    granted by the firmware.
  - Don't set the first word of the capability array before invoking
    _OSC.  This word is always set explicitly by acpi_EvaluateOSC()
    since it is UUID-independent.
  - Don't modify the set of granted controls unless _OSC doesn't exist
    (which is treated as always successful), or the _OSC method
    doesn't fail.
  - Don't require an _OSC status of 0 for success.  _OSC always
    returns the updated control mask even if it returns a non-zero
    status in the first word.
  - Whine if _OSC ever tries to revoke a previously-granted control.
    (It is not supposed to do that.)
- While here, add constants for the _OSC status word in acpivar.h
  (though currently unused).

Reported by:	adrian
Reviewed by:	imp
MFC after:	1 week
Tested on:	Lenovo x220
Differential Revision:	https://reviews.freebsd.org/D10520
2017-04-27 16:32:42 +00:00

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/*-
* Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
* 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, 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 __PCIB_PRIVATE_H__
#define __PCIB_PRIVATE_H__
#include <sys/_callout.h>
#include <sys/_task.h>
#ifdef NEW_PCIB
/*
* Data structure and routines that Host to PCI bridge drivers can use
* to restrict allocations for child devices to ranges decoded by the
* bridge.
*/
struct pcib_host_resources {
device_t hr_pcib;
struct resource_list hr_rl;
};
int pcib_host_res_init(device_t pcib,
struct pcib_host_resources *hr);
int pcib_host_res_free(device_t pcib,
struct pcib_host_resources *hr);
int pcib_host_res_decodes(struct pcib_host_resources *hr, int type,
rman_res_t start, rman_res_t end, u_int flags);
struct resource *pcib_host_res_alloc(struct pcib_host_resources *hr,
device_t dev, int type, int *rid, rman_res_t start,
rman_res_t end, rman_res_t count, u_int flags);
int pcib_host_res_adjust(struct pcib_host_resources *hr,
device_t dev, int type, struct resource *r, rman_res_t start,
rman_res_t end);
#endif
/*
* Export portions of generic PCI:PCI bridge support so that it can be
* used by subclasses.
*/
DECLARE_CLASS(pcib_driver);
#ifdef NEW_PCIB
#define WIN_IO 0x1
#define WIN_MEM 0x2
#define WIN_PMEM 0x4
struct pcib_window {
pci_addr_t base; /* base address */
pci_addr_t limit; /* topmost address */
struct rman rman;
struct resource **res;
int count; /* size of 'res' array */
int reg; /* resource id from parent */
int valid;
int mask; /* WIN_* bitmask of this window */
int step; /* log_2 of window granularity */
const char *name;
};
#endif
struct pcib_secbus {
u_int sec;
u_int sub;
#if defined(NEW_PCIB) && defined(PCI_RES_BUS)
device_t dev;
struct rman rman;
struct resource *res;
const char *name;
int sub_reg;
#endif
};
/*
* Bridge-specific data.
*/
struct pcib_softc
{
device_t dev;
device_t child;
uint32_t flags; /* flags */
#define PCIB_SUBTRACTIVE 0x1
#define PCIB_DISABLE_MSI 0x2
#define PCIB_DISABLE_MSIX 0x4
#define PCIB_ENABLE_ARI 0x8
#define PCIB_HOTPLUG 0x10
#define PCIB_HOTPLUG_CMD_PENDING 0x20
#define PCIB_DETACH_PENDING 0x40
#define PCIB_DETACHING 0x80
u_int domain; /* domain number */
u_int pribus; /* primary bus number */
struct pcib_secbus bus; /* secondary bus numbers */
#ifdef NEW_PCIB
struct pcib_window io; /* I/O port window */
struct pcib_window mem; /* memory window */
struct pcib_window pmem; /* prefetchable memory window */
#else
pci_addr_t pmembase; /* base address of prefetchable memory */
pci_addr_t pmemlimit; /* topmost address of prefetchable memory */
pci_addr_t membase; /* base address of memory window */
pci_addr_t memlimit; /* topmost address of memory window */
uint32_t iobase; /* base address of port window */
uint32_t iolimit; /* topmost address of port window */
#endif
uint16_t bridgectl; /* bridge control register */
uint16_t pcie_link_sta;
uint16_t pcie_slot_sta;
uint32_t pcie_slot_cap;
struct resource *pcie_irq;
void *pcie_ihand;
struct task pcie_hp_task;
struct callout pcie_ab_timer;
struct callout pcie_cc_timer;
struct callout pcie_dll_timer;
};
#define PCIB_SUPPORTED_ARI_VER 1
typedef uint32_t pci_read_config_fn(int b, int s, int f, int reg, int width);
int host_pcib_get_busno(pci_read_config_fn read_config, int bus,
int slot, int func, uint8_t *busnum);
#if defined(NEW_PCIB) && defined(PCI_RES_BUS)
struct resource *pci_domain_alloc_bus(int domain, device_t dev, int *rid,
rman_res_t start, rman_res_t end, rman_res_t count, u_int flags);
int pci_domain_adjust_bus(int domain, device_t dev,
struct resource *r, rman_res_t start, rman_res_t end);
int pci_domain_release_bus(int domain, device_t dev, int rid,
struct resource *r);
struct resource *pcib_alloc_subbus(struct pcib_secbus *bus, device_t child,
int *rid, rman_res_t start, rman_res_t end, rman_res_t count,
u_int flags);
void pcib_free_secbus(device_t dev, struct pcib_secbus *bus);
void pcib_setup_secbus(device_t dev, struct pcib_secbus *bus,
int min_count);
#endif
int pcib_attach(device_t dev);
int pcib_attach_child(device_t dev);
void pcib_attach_common(device_t dev);
void pcib_bridge_init(device_t dev);
#ifdef NEW_PCIB
const char *pcib_child_name(device_t child);
#endif
int pcib_child_present(device_t dev, device_t child);
int pcib_detach(device_t dev);
int pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result);
int pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value);
struct resource *pcib_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);
#ifdef NEW_PCIB
int pcib_adjust_resource(device_t bus, device_t child, int type,
struct resource *r, rman_res_t start, rman_res_t end);
int pcib_release_resource(device_t dev, device_t child, int type, int rid,
struct resource *r);
#endif
int pcib_maxslots(device_t dev);
int pcib_maxfuncs(device_t dev);
int pcib_route_interrupt(device_t pcib, device_t dev, int pin);
int pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs);
int pcib_release_msi(device_t pcib, device_t dev, int count, int *irqs);
int pcib_alloc_msix(device_t pcib, device_t dev, int *irq);
int pcib_release_msix(device_t pcib, device_t dev, int irq);
int pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data);
int pcib_get_id(device_t pcib, device_t dev, enum pci_id_type type,
uintptr_t *id);
void pcib_decode_rid(device_t pcib, uint16_t rid, int *bus,
int *slot, int *func);
int pcib_request_feature(device_t dev, enum pci_feature feature);
int pcib_request_feature_allow(device_t pcib, device_t dev, enum pci_feature feature);
#endif
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