[PATCH] Calgary: use BIOS supplied BBARs and topology information

Find the BBAR register address of each Calgary using the "Extended
BIOS Data Area" rather than calculating it ourselves. Also get the bus
topology (what PHB each bus is on) from Calgary rather than
calculating it ourselves.

This patch fixes http://bugzilla.kernel.org/show_bug.cgi?id=7407.

Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
Signed-off-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Andi Kleen <ak@suse.de>

1 files changed, 76 insertions, 0 deletions

diff --git a/include/asm-x86_64/rio.h b/include/asm-x86_64/rio.h
new file mode 100644
index 000000000000..1f315c39d76e
--- /dev/null
+++ b/include/asm-x86_64/rio.h
@@ -0,0 +1,76 @@
+/*
+ * Derived from include/asm-i386/mach-summit/mach_mpparse.h
+ *          and include/asm-i386/mach-default/bios_ebda.h
+ *
+ * Author: Laurent Vivier <Laurent.Vivier@bull.net>
+ *
+ */
+
+#ifndef __ASM_RIO_H
+#define __ASM_RIO_H
+
+#define RIO_TABLE_VERSION       3
+
+struct rio_table_hdr {
+        u8 version;      /* Version number of this data structure  */
+        u8 num_scal_dev; /* # of Scalability devices               */
+        u8 num_rio_dev;  /* # of RIO I/O devices                   */
+} __attribute__((packed));
+
+struct scal_detail {
+        u8 node_id;      /* Scalability Node ID                    */
+        u32  CBAR;       /* Address of 1MB register space          */
+        u8 port0node;    /* Node ID port connected to: 0xFF=None   */
+        u8 port0port;    /* Port num port connected to: 0,1,2, or  */
+                         /* 0xFF=None                              */
+        u8 port1node;    /* Node ID port connected to: 0xFF = None */
+        u8 port1port;    /* Port num port connected to: 0,1,2, or  */
+                         /* 0xFF=None                              */
+        u8 port2node;    /* Node ID port connected to: 0xFF = None */
+        u8 port2port;    /* Port num port connected to: 0,1,2, or  */
+                         /* 0xFF=None                              */
+        u8 chassis_num;  /* 1 based Chassis number (1 = boot node) */
+} __attribute__((packed));
+
+struct rio_detail {
+        u8 node_id;      /* RIO Node ID                            */
+        u32  BBAR;       /* Address of 1MB register space          */
+        u8 type;         /* Type of device                         */
+        u8 owner_id;     /* Node ID of Hurricane that owns this    */
+                         /* node                                   */
+        u8 port0node;    /* Node ID port connected to: 0xFF=None   */
+        u8 port0port;    /* Port num port connected to: 0,1,2, or  */
+                         /* 0xFF=None                              */
+        u8 port1node;    /* Node ID port connected to: 0xFF=None   */
+        u8 port1port;    /* Port num port connected to: 0,1,2, or  */
+                         /* 0xFF=None                              */
+        u8 first_slot;   /* Lowest slot number below this Calgary  */
+        u8 status;       /* Bit 0 = 1 : the XAPIC is used          */
+                         /*       = 0 : the XAPIC is not used, ie: */
+                         /*            ints fwded to another XAPIC */
+                         /*           Bits1:7 Reserved             */
+        u8 WP_index;     /* instance index - lower ones have       */
+                         /*     lower slot numbers/PCI bus numbers */
+        u8 chassis_num;  /* 1 based Chassis number                 */
+} __attribute__((packed));
+
+enum {
+        HURR_SCALABILTY = 0,  /* Hurricane Scalability info */
+        HURR_RIOIB      = 2,  /* Hurricane RIOIB info       */
+        COMPAT_CALGARY  = 4,  /* Compatibility Calgary      */
+        ALT_CALGARY     = 5,  /* Second Planar Calgary      */
+};
+
+/*
+ * there is a real-mode segmented pointer pointing to the
+ * 4K EBDA area at 0x40E.
+ */
+
+static inline unsigned long get_bios_ebda(void)
+{
+        unsigned long address= *(unsigned short *)phys_to_virt(0x40Eul);
+        address <<= 4;
+        return address;
+}
+
+#endif /* __ASM_RIO_H */