2 * Copyright 2009 Red Hat, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software")
6 * to deal in the software without restriction, including without limitation
7 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * them Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTIBILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES, OR OTHER LIABILITY, WHETHER
19 * IN AN ACTION OF CONTRACT, TORT, OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 * Adam Jackson <ajax@redhat.com>
28 #include "pciaccess.h"
29 #include "pciaccess_private.h"
31 static struct pci_io_handle *
34 struct pci_io_handle *new;
36 new = malloc(sizeof(struct pci_io_handle));
44 delete_io_handle(struct pci_io_handle *handle)
56 * Open a handle to a PCI device I/O range. The \c base and \c size
57 * requested must fit entirely within a single I/O BAR on the device.
58 * \c size is in bytes.
61 * An opaque handle to the I/O BAR, or \c NULL on error.
63 struct pci_io_handle *
64 pci_device_open_io(struct pci_device *dev, pciaddr_t base, pciaddr_t size)
66 struct pci_io_handle *ret;
69 if (!pci_sys->methods->open_device_io)
72 for (bar = 0; bar < 6; bar++) {
73 struct pci_mem_region *region = &(dev->regions[bar]);
77 if (base < region->base_addr || base > (region->base_addr+region->size))
80 if ((base + size) > (region->base_addr + region->size))
83 ret = new_io_handle();
87 if (!pci_sys->methods->open_device_io(ret, dev, bar, base, size)) {
88 delete_io_handle(ret);
99 * Open a handle to the legacy I/O space for the PCI domain containing
100 * \c dev. \c size is in bytes.
103 * An opaque handle to the requested range, or \c NULL on error.
105 struct pci_io_handle *
106 pci_legacy_open_io(struct pci_device *dev, pciaddr_t base, pciaddr_t size)
108 struct pci_io_handle *ret;
110 if (!pci_sys->methods->open_legacy_io)
113 ret = new_io_handle();
117 if (!pci_sys->methods->open_legacy_io(ret, dev, base, size)) {
118 delete_io_handle(ret);
126 * Close an I/O handle.
129 pci_device_close_io(struct pci_device *dev, struct pci_io_handle *handle)
131 if (dev && handle && pci_sys->methods->close_io)
132 pci_sys->methods->close_io(dev, handle);
134 delete_io_handle(handle);
138 * Read a 32-bit value from the I/O space. \c reg is relative to the
139 * \c base specified when the handle was opened. Some platforms may
140 * require that \c reg be 32-bit-aligned.
143 * The value read from the I/O port, or undefined on any error.
146 pci_io_read32(struct pci_io_handle *handle, uint32_t reg)
148 if (reg + 4 > handle->size)
151 return pci_sys->methods->read32(handle, reg);
155 * Read a 16-bit value from the I/O space. \c reg is relative to the
156 * \c base specified when the handle was opened. Some platforms may
157 * require that \c reg be 16-bit-aligned.
160 * The value read from the I/O port, or undefined on any error.
163 pci_io_read16(struct pci_io_handle *handle, uint32_t reg)
165 if (reg + 2 > handle->size)
168 return pci_sys->methods->read16(handle, reg);
172 * Read a 8-bit value from the I/O space. \c reg is relative to the
173 * \c base specified when the handle was opened.
176 * The value read from the I/O port, or undefined on any error.
179 pci_io_read8(struct pci_io_handle *handle, uint32_t reg)
181 if (reg + 1 > handle->size)
184 return pci_sys->methods->read8(handle, reg);
188 * Write a 32-bit value to the I/O space. \c reg is relative to the
189 * \c base specified when the handle was opened. Some platforms may
190 * require that \c reg be 32-bit-aligned.
193 pci_io_write32(struct pci_io_handle *handle, uint32_t reg, uint32_t data)
195 if (reg + 4 > handle->size)
198 pci_sys->methods->write32(handle, reg, data);
202 * Write a 16-bit value to the I/O space. \c reg is relative to the
203 * \c base specified when the handle was opened. Some platforms may
204 * require that \c reg be 16-bit-aligned.
207 pci_io_write16(struct pci_io_handle *handle, uint32_t reg, uint16_t data)
209 if (reg + 2 > handle->size)
212 pci_sys->methods->write16(handle, reg, data);
216 * Write a 8-bit value to the I/O space. \c reg is relative to the
217 * \c base specified when the handle was opened.
220 pci_io_write8(struct pci_io_handle *handle, uint32_t reg, uint8_t data)
222 if (reg + 1 > handle->size)
225 pci_sys->methods->write8(handle, reg, data);