208 lines
6.0 KiB
C
208 lines
6.0 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (c) 2003-2005 Silicon Graphics, Inc. All rights reserved.
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*/
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#ifndef _ASM_IA64_SN_TIO_CA_AGP_PROVIDER_H
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#define _ASM_IA64_SN_TIO_CA_AGP_PROVIDER_H
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#include <asm/sn/tioca.h>
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/*
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* WAR enables
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* Defines for individual WARs. Each is a bitmask of applicable
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* part revision numbers. (1 << 1) == rev A, (1 << 2) == rev B,
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* (3 << 1) == (rev A or rev B), etc
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*/
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#define TIOCA_WAR_ENABLED(pv, tioca_common) \
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((1 << tioca_common->ca_rev) & pv)
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/* TIO:ICE:FRZ:Freezer loses a PIO data ucred on PIO RD RSP with CW error */
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#define PV907908 (1 << 1)
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/* ATI config space problems after BIOS execution starts */
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#define PV908234 (1 << 1)
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/* CA:AGPDMA write request data mismatch with ABC1CL merge */
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#define PV895469 (1 << 1)
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/* TIO:CA TLB invalidate of written GART entries possibly not occurring in CA*/
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#define PV910244 (1 << 1)
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struct tioca_dmamap{
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struct list_head cad_list; /* headed by ca_list */
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dma_addr_t cad_dma_addr; /* Linux dma handle */
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uint cad_gart_entry; /* start entry in ca_gart_pagemap */
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uint cad_gart_size; /* #entries for this map */
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};
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/*
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* Kernel only fields. Prom may look at this stuff for debugging only.
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* Access this structure through the ca_kernel_private ptr.
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*/
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struct tioca_common ;
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struct tioca_kernel {
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struct tioca_common *ca_common; /* tioca this belongs to */
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struct list_head ca_list; /* list of all ca's */
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struct list_head ca_dmamaps;
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spinlock_t ca_lock; /* Kernel lock */
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cnodeid_t ca_closest_node;
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struct list_head *ca_devices; /* bus->devices */
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/*
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* General GART stuff
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*/
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u64 ca_ap_size; /* size of aperature in bytes */
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u32 ca_gart_entries; /* # u64 entries in gart */
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u32 ca_ap_pagesize; /* aperature page size in bytes */
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u64 ca_ap_bus_base; /* bus address of CA aperature */
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u64 ca_gart_size; /* gart size in bytes */
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u64 *ca_gart; /* gart table vaddr */
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u64 ca_gart_coretalk_addr; /* gart coretalk addr */
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u8 ca_gart_iscoherent; /* used in tioca_tlbflush */
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/* PCI GART convenience values */
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u64 ca_pciap_base; /* pci aperature bus base address */
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u64 ca_pciap_size; /* pci aperature size (bytes) */
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u64 ca_pcigart_base; /* gfx GART bus base address */
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u64 *ca_pcigart; /* gfx GART vm address */
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u32 ca_pcigart_entries;
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u32 ca_pcigart_start; /* PCI start index in ca_gart */
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void *ca_pcigart_pagemap;
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/* AGP GART convenience values */
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u64 ca_gfxap_base; /* gfx aperature bus base address */
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u64 ca_gfxap_size; /* gfx aperature size (bytes) */
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u64 ca_gfxgart_base; /* gfx GART bus base address */
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u64 *ca_gfxgart; /* gfx GART vm address */
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u32 ca_gfxgart_entries;
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u32 ca_gfxgart_start; /* agpgart start index in ca_gart */
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};
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/*
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* Common tioca info shared between kernel and prom
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*
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* DO NOT CHANGE THIS STRUCT WITHOUT MAKING CORRESPONDING CHANGES
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* TO THE PROM VERSION.
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*/
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struct tioca_common {
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struct pcibus_bussoft ca_common; /* common pciio header */
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u32 ca_rev;
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u32 ca_closest_nasid;
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u64 ca_prom_private;
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u64 ca_kernel_private;
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};
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/**
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* tioca_paddr_to_gart - Convert an SGI coretalk address to a CA GART entry
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* @paddr: page address to convert
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*
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* Convert a system [coretalk] address to a GART entry. GART entries are
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* formed using the following:
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*
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* data = ( (1<<63) | ( (REMAP_NODE_ID << 40) | (MD_CHIPLET_ID << 38) |
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* (REMAP_SYS_ADDR) ) >> 12 )
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*
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* DATA written to 1 GART TABLE Entry in system memory is remapped system
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* addr for 1 page
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*
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* The data is for coretalk address format right shifted 12 bits with a
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* valid bit.
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*
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* GART_TABLE_ENTRY [ 25:0 ] -- REMAP_SYS_ADDRESS[37:12].
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* GART_TABLE_ENTRY [ 27:26 ] -- SHUB MD chiplet id.
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* GART_TABLE_ENTRY [ 41:28 ] -- REMAP_NODE_ID.
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* GART_TABLE_ENTRY [ 63 ] -- Valid Bit
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*/
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static inline u64
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tioca_paddr_to_gart(unsigned long paddr)
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{
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/*
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* We are assuming right now that paddr already has the correct
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* format since the address from xtalk_dmaXXX should already have
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* NODE_ID, CHIPLET_ID, and SYS_ADDR in the correct locations.
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*/
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return ((paddr) >> 12) | (1UL << 63);
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}
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/**
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* tioca_physpage_to_gart - Map a host physical page for SGI CA based DMA
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* @page_addr: system page address to map
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*/
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static inline unsigned long
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tioca_physpage_to_gart(u64 page_addr)
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{
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u64 coretalk_addr;
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coretalk_addr = PHYS_TO_TIODMA(page_addr);
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if (!coretalk_addr) {
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return 0;
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}
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return tioca_paddr_to_gart(coretalk_addr);
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}
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/**
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* tioca_tlbflush - invalidate cached SGI CA GART TLB entries
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* @tioca_kernel: CA context
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*
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* Invalidate tlb entries for a given CA GART. Main complexity is to account
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* for revA bug.
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*/
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static inline void
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tioca_tlbflush(struct tioca_kernel *tioca_kernel)
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{
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volatile u64 tmp;
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volatile struct tioca __iomem *ca_base;
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struct tioca_common *tioca_common;
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tioca_common = tioca_kernel->ca_common;
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ca_base = (struct tioca __iomem *)tioca_common->ca_common.bs_base;
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/*
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* Explicit flushes not needed if GART is in cached mode
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*/
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if (tioca_kernel->ca_gart_iscoherent) {
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if (TIOCA_WAR_ENABLED(PV910244, tioca_common)) {
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/*
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* PV910244: RevA CA needs explicit flushes.
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* Need to put GART into uncached mode before
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* flushing otherwise the explicit flush is ignored.
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*
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* Alternate WAR would be to leave GART cached and
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* touch every CL aligned GART entry.
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*/
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__sn_clrq_relaxed(&ca_base->ca_control2, CA_GART_MEM_PARAM);
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__sn_setq_relaxed(&ca_base->ca_control2, CA_GART_FLUSH_TLB);
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__sn_setq_relaxed(&ca_base->ca_control2,
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(0x2ull << CA_GART_MEM_PARAM_SHFT));
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tmp = __sn_readq_relaxed(&ca_base->ca_control2);
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}
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return;
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}
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/*
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* Gart in uncached mode ... need an explicit flush.
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*/
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__sn_setq_relaxed(&ca_base->ca_control2, CA_GART_FLUSH_TLB);
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tmp = __sn_readq_relaxed(&ca_base->ca_control2);
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}
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extern u32 tioca_gart_found;
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extern struct list_head tioca_list;
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extern int tioca_init_provider(void);
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extern void tioca_fastwrite_enable(struct tioca_kernel *tioca_kern);
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#endif /* _ASM_IA64_SN_TIO_CA_AGP_PROVIDER_H */
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