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freebsd-dev/sys/dev/pci/pcib_private.h
John Baldwin 6f33eaa5f0 Implement a proper detach method for the PCI-PCI bridge driver. 
- Add a pcib_detach() function for the PCI-PCI bridge driver.  It
  tears down the NEW_PCIB and hotplug state including destroying
  resource managers, deleting child devices, and disabling hotplug
  events.
- Add a detach method to the ACPI PCI-PCI bridge driver which calls
  pcib_detach() and then frees the copy of the _PRT interrupt routing
  table.
- Add a detach method to the PCI-Cardbus bridge driver which frees
  the PCI bus resources in addition to calling cbb_detach().
- Explicitly clear any pending hotplug events during attach to ensure
  future events will generate an interrupt.
- If a the Command Completed bit is set in the slot status register
  when the command completion timeout fires, treat it as if the
  command completed and the completion interrupt was just lost rather
  than forcing a detach.
- Don't wait for a Command Completed notification if Command Completion
  interrupts are disabled.  The spec explicitly says no interrupt is
  enabled when clearing CCIE, and on my T400 no interrupt is generated
  when CCIE is changed from cleared to set, either.  In addition, the
  T400 doesn't appear to set the Command Completed bit in the cases
  where it doesn't generate an interrupt, so don't schedule the timer
  either.  (If the CC bit were always set, one could always set the timer
  and rely on the logic of treating CC set as a missed interrupt.)

Reviewed by:	imp (older version)
Differential Revision:	https://reviews.freebsd.org/D6424
2016-05-20 00:03:22 +00:00

199 lines
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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_link_cap;
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);
#endif
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