This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / drivers / xen / pciback / conf_space.h

diff --git a/drivers/xen/pciback/conf_space.h b/drivers/xen/pciback/conf_space.h
new file mode 100644 (file)
index 0000000..76fe5d8
--- /dev/null
+++ b/drivers/xen/pciback/conf_space.h
@@ -0,0 +1,126 @@
+/*
+ * PCI Backend - Common data structures for overriding the configuration space
+ *
+ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
+ */
+
+#ifndef __XEN_PCIBACK_CONF_SPACE_H__
+#define __XEN_PCIBACK_CONF_SPACE_H__
+
+#include <linux/list.h>
+#include <linux/err.h>
+
+/* conf_field_init can return an errno in a ptr with ERR_PTR() */
+typedef void *(*conf_field_init) (struct pci_dev * dev, int offset);
+typedef void (*conf_field_reset) (struct pci_dev * dev, int offset, void *data);
+typedef void (*conf_field_free) (struct pci_dev * dev, int offset, void *data);
+
+typedef int (*conf_dword_write) (struct pci_dev * dev, int offset, u32 value,
+                                void *data);
+typedef int (*conf_word_write) (struct pci_dev * dev, int offset, u16 value,
+                               void *data);
+typedef int (*conf_byte_write) (struct pci_dev * dev, int offset, u8 value,
+                               void *data);
+typedef int (*conf_dword_read) (struct pci_dev * dev, int offset, u32 * value,
+                               void *data);
+typedef int (*conf_word_read) (struct pci_dev * dev, int offset, u16 * value,
+                              void *data);
+typedef int (*conf_byte_read) (struct pci_dev * dev, int offset, u8 * value,
+                              void *data);
+
+/* These are the fields within the configuration space which we
+ * are interested in intercepting reads/writes to and changing their
+ * values.
+ */
+struct config_field {
+       unsigned int offset;
+       unsigned int size;
+       unsigned int mask;
+       conf_field_init init;
+       conf_field_reset reset;
+       conf_field_free release;
+       void (*clean) (struct config_field * field);
+       union {
+               struct {
+                       conf_dword_write write;
+                       conf_dword_read read;
+               } dw;
+               struct {
+                       conf_word_write write;
+                       conf_word_read read;
+               } w;
+               struct {
+                       conf_byte_write write;
+                       conf_byte_read read;
+               } b;
+       } u;
+       struct list_head list;
+};
+
+struct config_field_entry {
+       struct list_head list;
+       struct config_field *field;
+       unsigned int base_offset;
+       void *data;
+};
+
+#define OFFSET(cfg_entry) ((cfg_entry)->base_offset+(cfg_entry)->field->offset)
+
+/* Add fields to a device - the add_fields macro expects to get a pointer to
+ * the first entry in an array (of which the ending is marked by size==0)
+ */
+int pciback_config_add_field_offset(struct pci_dev *dev,
+                                   struct config_field *field,
+                                   unsigned int offset);
+
+static inline int pciback_config_add_field(struct pci_dev *dev,
+                                          struct config_field *field)
+{
+       return pciback_config_add_field_offset(dev, field, 0);
+}
+
+static inline int pciback_config_add_fields(struct pci_dev *dev,
+                                           struct config_field *field)
+{
+       int i, err = 0;
+       for (i = 0; field[i].size != 0; i++) {
+               err = pciback_config_add_field(dev, &field[i]);
+               if (err)
+                       break;
+       }
+       return err;
+}
+
+static inline int pciback_config_add_fields_offset(struct pci_dev *dev,
+                                                  struct config_field *field,
+                                                  unsigned int offset)
+{
+       int i, err = 0;
+       for (i = 0; field[i].size != 0; i++) {
+               err = pciback_config_add_field_offset(dev, &field[i], offset);
+               if (err)
+                       break;
+       }
+       return err;
+}
+
+/* Read/Write the real configuration space */
+int pciback_read_config_byte(struct pci_dev *dev, int offset, u8 * value,
+                            void *data);
+int pciback_read_config_word(struct pci_dev *dev, int offset, u16 * value,
+                            void *data);
+int pciback_read_config_dword(struct pci_dev *dev, int offset, u32 * value,
+                             void *data);
+int pciback_write_config_byte(struct pci_dev *dev, int offset, u8 value,
+                             void *data);
+int pciback_write_config_word(struct pci_dev *dev, int offset, u16 value,
+                             void *data);
+int pciback_write_config_dword(struct pci_dev *dev, int offset, u32 value,
+                              void *data);
+
+int pciback_config_capability_init(void);
+
+int pciback_config_header_add_fields(struct pci_dev *dev);
+int pciback_config_capability_add_fields(struct pci_dev *dev);
+
+#endif                         /* __XEN_PCIBACK_CONF_SPACE_H__ */