Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / drivers / bus / pci_settings.c

diff --git a/qemu/roms/ipxe/src/drivers/bus/pci_settings.c b/qemu/roms/ipxe/src/drivers/bus/pci_settings.c
new file mode 100644 (file)
index 0000000..db20452
--- /dev/null
+++ b/qemu/roms/ipxe/src/drivers/bus/pci_settings.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdio.h>
+#include <errno.h>
+#include <ipxe/pci.h>
+#include <ipxe/settings.h>
+#include <ipxe/init.h>
+
+/** @file
+ *
+ * PCI device settings
+ *
+ */
+
+/** PCI device settings scope */
+static const struct settings_scope pci_settings_scope;
+
+/**
+ * Check applicability of PCI device setting
+ *
+ * @v settings         Settings block
+ * @v setting          Setting
+ * @ret applies                Setting applies within this settings block
+ */
+static int pci_settings_applies ( struct settings *settings __unused,
+                                 const struct setting *setting ) {
+
+       return ( setting->scope == &pci_settings_scope );
+}
+
+/**
+ * Fetch value of PCI device setting
+ *
+ * @v settings         Settings block
+ * @v setting          Setting to fetch
+ * @v data             Buffer to fill with setting data
+ * @v len              Length of buffer
+ * @ret len            Length of setting data, or negative error
+ */
+static int pci_settings_fetch ( struct settings *settings __unused,
+                               struct setting *setting,
+                               void *data, size_t len ) {
+       struct pci_device pci;
+       unsigned int tag_busdevfn;
+       unsigned int tag_offset;
+       unsigned int tag_len;
+       unsigned int i;
+
+       /* Extract busdevfn, offset, and length from tag */
+       tag_busdevfn = ( ( setting->tag >> 16 ) & 0xffff );
+       tag_offset = ( ( setting->tag >> 8 ) & 0xff );
+       tag_len = ( ( setting->tag >> 0 ) & 0xff );
+
+       /* Locate PCI device */
+       memset ( &pci, 0, sizeof ( pci ) );
+       pci_init ( &pci, tag_busdevfn );
+       DBG ( PCI_FMT " reading %#02x+%#x\n", PCI_ARGS ( &pci ),
+             tag_offset, tag_len );
+
+       /* Read data one byte at a time, in reverse order (since PCI
+        * is little-endian and iPXE settings are essentially
+        * big-endian).
+        */
+       tag_offset += tag_len;
+       for ( i = 0 ; ( ( i < tag_len ) && ( i < len ) ); i++ ) {
+               pci_read_config_byte ( &pci, --tag_offset, data++ );
+       }
+
+       /* Set type to ":hexraw" if not already specified */
+       if ( ! setting->type )
+               setting->type = &setting_type_hexraw;
+
+       return tag_len;
+}
+
+/** PCI device settings operations */
+static struct settings_operations pci_settings_operations = {
+       .applies = pci_settings_applies,
+       .fetch = pci_settings_fetch,
+};
+
+/** PCI device settings */
+static struct settings pci_settings = {
+       .refcnt = NULL,
+       .siblings = LIST_HEAD_INIT ( pci_settings.siblings ),
+       .children = LIST_HEAD_INIT ( pci_settings.children ),
+       .op = &pci_settings_operations,
+       .default_scope = &pci_settings_scope,
+};
+
+/** Initialise PCI device settings */
+static void pci_settings_init ( void ) {
+       int rc;
+
+       if ( ( rc = register_settings ( &pci_settings, NULL, "pci" ) ) != 0 ) {
+               DBG ( "PCI could not register settings: %s\n",
+                     strerror ( rc ) );
+               return;
+       }
+}
+
+/** PCI device settings initialiser */
+struct init_fn pci_settings_init_fn __init_fn ( INIT_NORMAL ) = {
+       .initialise = pci_settings_init,
+};