e706f7f0c7
- Simplify the amount of work that has be done for each architecture by pushing more of the truly MI code down into the PCI bus driver. - Don't bind MSI-X indicies to IRQs so that we can allow a driver to map multiple MSI-X messages into a single IRQ when handling a message shortage. The changes include: - Add a new pcib_if method: PCIB_MAP_MSI() which is called by the PCI bus to calculate the address and data values for a given MSI/MSI-X IRQ. The x86 nexus drivers map this into a call to a new 'msi_map()' function in msi.c that does the mapping. - Retire the pcib_if method PCIB_REMAP_MSIX() and remove the 'index' parameter from PCIB_ALLOC_MSIX(). MD code no longer has any knowledge of the MSI-X index for a given MSI-X IRQ. - The PCI bus driver now stores more MSI-X state in a child's ivars. Specifically, it now stores an array of IRQs (called "message vectors" in the code) that have associated address and data values, and a small virtual version of the MSI-X table that specifies the message vector that a given MSI-X table entry uses. Sparse mappings are permitted in the virtual table. - The PCI bus driver now configures the MSI and MSI-X address/data registers directly via custom bus_setup_intr() and bus_teardown_intr() methods. pci_setup_intr() invokes PCIB_MAP_MSI() to determine the address and data values for a given message as needed. The MD code no longer has to call back down into the PCI bus code to set these values from the nexus' bus_setup_intr() handler. - The PCI bus code provides a callout (pci_remap_msi_irq()) that the MD code can call to force the PCI bus to re-invoke PCIB_MAP_MSI() to get new values of the address and data fields for a given IRQ. The x86 MSI code uses this when an MSI IRQ is moved to a different CPU, requiring a new value of the 'address' field. - The x86 MSI psuedo-driver loses a lot of code, and in fact the separate MSI/MSI-X pseudo-PICs are collapsed down into a single MSI PIC driver since the only remaining diff between the two is a substring in a bootverbose printf. - The PCI bus driver will now restore MSI-X state (including programming entries in the MSI-X table) on device resume. - The interface for pci_remap_msix() has changed. Instead of accepting indices for the allocated vectors, it accepts a mini-virtual table (with a new length parameter). This table is an array of u_ints, where each value specifies which allocated message vector to use for the corresponding MSI-X message. A vector of 0 forces a message to not have an associated IRQ. The device may choose to only use some of the IRQs assigned, in which case the unused IRQs must be at the "end" and will be released back to the system. This allows a driver to use the same remap table for different shortage values. For example, if a driver wants 4 messages, it can use the same remap table (which only uses the first two messages) for the cases when it only gets 2 or 3 messages and in the latter case the PCI bus will release the 3rd IRQ back to the system. MFC after: 1 month
102 lines
4.6 KiB
C
102 lines
4.6 KiB
C
/*-
|
|
* 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);
|
|
|
|
void pci_add_children(device_t dev, int busno, size_t dinfo_size);
|
|
void pci_add_child(device_t bus, struct pci_devinfo *dinfo);
|
|
void pci_add_resources(device_t bus, device_t dev, int force,
|
|
uint32_t prefetchmask);
|
|
void pci_driver_added(device_t dev, driver_t *driver);
|
|
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_extcap_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);
|
|
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);
|
|
struct resource *pci_alloc_resource(device_t dev, device_t child,
|
|
int type, int *rid, u_long start, u_long end, u_long count,
|
|
u_int flags);
|
|
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, int b, int s, int f,
|
|
size_t size);
|
|
void pci_print_verbose(struct pci_devinfo *dinfo);
|
|
int pci_freecfg(struct pci_devinfo *dinfo);
|
|
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_suspend(device_t dev);
|
|
void pci_cfg_restore(device_t, struct pci_devinfo *);
|
|
void pci_cfg_save(device_t, struct pci_devinfo *, int);
|
|
|
|
#endif /* _PCI_PRIVATE_H_ */
|