2 # Copyright (c) 2000 Doug Rabson
5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions
8 # 1. Redistributions of source code must retain the above copyright
9 # notice, this list of conditions and the following disclaimer.
10 # 2. Redistributions in binary form must reproduce the above copyright
11 # notice, this list of conditions and the following disclaimer in the
12 # documentation and/or other materials provided with the distribution.
14 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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16 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <dev/pci/pcivar.h>
32 #include <dev/pci/pcib_private.h>
38 null_route_interrupt(device_t pcib, device_t dev, int pin)
40 return (PCI_INVALID_IRQ);
44 pcib_null_ari_enabled(device_t pcib)
56 # Return the number of slots on the attached PCI bus.
64 # Return the number of functions on the attached PCI bus.
68 } DEFAULT pcib_maxfuncs;
71 # Read configuration space on the PCI bus. The bus, slot and func
72 # arguments determine the device which is being read and the reg
73 # argument is a byte offset into configuration space for that
74 # device. The width argument (which should be 1, 2 or 4) specifies how
75 # many byte of configuration space to read from that offset.
77 METHOD u_int32_t read_config {
87 # Write configuration space on the PCI bus. The bus, slot and func
88 # arguments determine the device which is being written and the reg
89 # argument is a byte offset into configuration space for that
90 # device. The value field is written to the configuration space, with
91 # the number of bytes written depending on the width argument.
93 METHOD void write_config {
104 # Route an interrupt. Returns a value suitable for stuffing into
105 # a device's interrupt register.
107 METHOD int route_interrupt {
111 } DEFAULT null_route_interrupt;
114 # Allocate 'count' MSI messsages mapped onto 'count' IRQs. 'irq' points
115 # to an array of at least 'count' ints. The max number of messages this
116 # device supports is included so that the MD code can take that into
117 # account when assigning resources so that the proper number of low bits
118 # are clear in the resulting message data value.
120 METHOD int alloc_msi {
129 # Release 'count' MSI messages mapped onto 'count' IRQs stored in the
130 # array pointed to by 'irqs'.
132 METHOD int release_msi {
140 # Allocate a single MSI-X message mapped onto '*irq'.
142 METHOD int alloc_msix {
149 # Release a single MSI-X message mapped onto 'irq'.
151 METHOD int release_msix {
158 # Determine the MSI/MSI-X message address and data for 'irq'. The address
159 # is returned in '*addr', and the data in '*data'.
170 # Return the device power state to be used during a system sleep state
171 # transition such as suspend and resume.
173 METHOD int power_for_sleep {
180 # Return the PCI Routing Identifier (RID) for the device.
185 enum pci_id_type type;
187 } DEFAULT pcib_get_id;
190 # Enable Alternative RID Interpretation if both the downstream port (pcib)
191 # and the endpoint device (dev) both support it.
193 METHOD int try_enable_ari {
199 # Return non-zero if PCI ARI is enabled, or zero otherwise
201 METHOD int ari_enabled {
203 } DEFAULT pcib_null_ari_enabled;
206 # Decode a PCI Routing Identifier (RID) into PCI bus/slot/function
208 METHOD void decode_rid {
214 } DEFAULT pcib_decode_rid;
217 # Request control of PCI features from host firmware, if any.
219 METHOD int request_feature {
222 enum pci_feature feature;