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Diffstat (limited to 'lib/pci_caps.h')
-rw-r--r-- | lib/pci_caps.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/lib/pci_caps.h b/lib/pci_caps.h new file mode 100644 index 0000000..86448de --- /dev/null +++ b/lib/pci_caps.h @@ -0,0 +1,76 @@ +/* + * Copyright (c) 2019 Nutanix Inc. All rights reserved. + * + * Authors: Thanos Makatos <thanos@nutanix.com> + * Swapnil Ingle <swapnil.ingle@nutanix.com> + * Felipe Franciosi <felipe@nutanix.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * 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. + * * Neither the name of Nutanix nor the names of its contributors may be + * used to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 <COPYRIGHT HOLDER> 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. + * + */ + +#ifndef LIB_VFIO_USER_PCI_CAPS_H +#define LIB_VFIO_USER_PCI_CAPS_H + +#include "libvfio-user.h" + +/* + * This is an arbitrary value, but more than enough for max caps in extended + * config space. + */ +#define VFU_MAX_CAPS (1024) + +struct pci_cap; + +typedef ssize_t (cap_write_cb_t)(vfu_ctx_t *vfu_ctx, struct pci_cap *cap, + char *buf, size_t count, loff_t offset); + +struct pci_cap { + const char *name; + uint8_t id; + size_t off; + size_t hdr_size; + size_t size; + unsigned int flags; + cap_write_cb_t *cb; +}; + +/* + * Return the first cap (if any) that intersects with the [off, off+count) + * interval. + */ +struct pci_cap * +cap_find_by_offset(vfu_ctx_t *ctx, loff_t off, size_t count); + +/* + * Handle an access to a capability. The access is guaranteed to be entirely + * within a capability. + */ +ssize_t +pci_cap_access(vfu_ctx_t *ctx, char *buf, size_t count, loff_t offset, + bool is_write); + +#endif /* LIB_VFIO_USER_PCI_CAPS_H */ + +/* ex: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */ |