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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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eae9375554
This patch cleans up the previous "Use BIOS supplied BBAR information" patch. Mostly stylistic clenaups, but also check for ioremap failure when we ioremap the BBAR rather than when trying to use it. 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> Acked-by: Laurent Vivier <Laurent.Vivier@bull.net>
75 lines
3.0 KiB
C
75 lines
3.0 KiB
C
/*
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* Derived from include/asm-i386/mach-summit/mach_mpparse.h
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* and include/asm-i386/mach-default/bios_ebda.h
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*
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* Author: Laurent Vivier <Laurent.Vivier@bull.net>
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*/
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#ifndef __ASM_RIO_H
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#define __ASM_RIO_H
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#define RIO_TABLE_VERSION 3
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struct rio_table_hdr {
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u8 version; /* Version number of this data structure */
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u8 num_scal_dev; /* # of Scalability devices */
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u8 num_rio_dev; /* # of RIO I/O devices */
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} __attribute__((packed));
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struct scal_detail {
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u8 node_id; /* Scalability Node ID */
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u32 CBAR; /* Address of 1MB register space */
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u8 port0node; /* Node ID port connected to: 0xFF=None */
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u8 port0port; /* Port num port connected to: 0,1,2, or */
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/* 0xFF=None */
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u8 port1node; /* Node ID port connected to: 0xFF = None */
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u8 port1port; /* Port num port connected to: 0,1,2, or */
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/* 0xFF=None */
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u8 port2node; /* Node ID port connected to: 0xFF = None */
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u8 port2port; /* Port num port connected to: 0,1,2, or */
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/* 0xFF=None */
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u8 chassis_num; /* 1 based Chassis number (1 = boot node) */
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} __attribute__((packed));
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struct rio_detail {
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u8 node_id; /* RIO Node ID */
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u32 BBAR; /* Address of 1MB register space */
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u8 type; /* Type of device */
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u8 owner_id; /* Node ID of Hurricane that owns this */
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/* node */
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u8 port0node; /* Node ID port connected to: 0xFF=None */
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u8 port0port; /* Port num port connected to: 0,1,2, or */
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/* 0xFF=None */
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u8 port1node; /* Node ID port connected to: 0xFF=None */
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u8 port1port; /* Port num port connected to: 0,1,2, or */
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/* 0xFF=None */
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u8 first_slot; /* Lowest slot number below this Calgary */
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u8 status; /* Bit 0 = 1 : the XAPIC is used */
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/* = 0 : the XAPIC is not used, ie: */
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/* ints fwded to another XAPIC */
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/* Bits1:7 Reserved */
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u8 WP_index; /* instance index - lower ones have */
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/* lower slot numbers/PCI bus numbers */
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u8 chassis_num; /* 1 based Chassis number */
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} __attribute__((packed));
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enum {
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HURR_SCALABILTY = 0, /* Hurricane Scalability info */
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HURR_RIOIB = 2, /* Hurricane RIOIB info */
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COMPAT_CALGARY = 4, /* Compatibility Calgary */
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ALT_CALGARY = 5, /* Second Planar Calgary */
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};
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/*
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* there is a real-mode segmented pointer pointing to the
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* 4K EBDA area at 0x40E.
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*/
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static inline unsigned long get_bios_ebda(void)
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{
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unsigned long address = *(unsigned short *)phys_to_virt(0x40EUL);
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address <<= 4;
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return address;
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}
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#endif /* __ASM_RIO_H */
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