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Diffstat (limited to 'arch/ia64/include/asm/sn/tioca_provider.h')
| -rw-r--r-- | arch/ia64/include/asm/sn/tioca_provider.h | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/sn/tioca_provider.h b/arch/ia64/include/asm/sn/tioca_provider.h new file mode 100644 index 000000000000..9a820ac61be3 --- /dev/null +++ b/arch/ia64/include/asm/sn/tioca_provider.h @@ -0,0 +1,207 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (c) 2003-2005 Silicon Graphics, Inc. All rights reserved. + */ + +#ifndef _ASM_IA64_SN_TIO_CA_AGP_PROVIDER_H +#define _ASM_IA64_SN_TIO_CA_AGP_PROVIDER_H + +#include <asm/sn/tioca.h> + +/* + * WAR enables + * Defines for individual WARs. Each is a bitmask of applicable + * part revision numbers. (1 << 1) == rev A, (1 << 2) == rev B, + * (3 << 1) == (rev A or rev B), etc + */ + +#define TIOCA_WAR_ENABLED(pv, tioca_common) \ + ((1 << tioca_common->ca_rev) & pv) + + /* TIO:ICE:FRZ:Freezer loses a PIO data ucred on PIO RD RSP with CW error */ +#define PV907908 (1 << 1) + /* ATI config space problems after BIOS execution starts */ +#define PV908234 (1 << 1) + /* CA:AGPDMA write request data mismatch with ABC1CL merge */ +#define PV895469 (1 << 1) + /* TIO:CA TLB invalidate of written GART entries possibly not occurring in CA*/ +#define PV910244 (1 << 1) + +struct tioca_dmamap{ + struct list_head cad_list; /* headed by ca_list */ + + dma_addr_t cad_dma_addr; /* Linux dma handle */ + uint cad_gart_entry; /* start entry in ca_gart_pagemap */ + uint cad_gart_size; /* #entries for this map */ +}; + +/* + * Kernel only fields. Prom may look at this stuff for debugging only. + * Access this structure through the ca_kernel_private ptr. + */ + +struct tioca_common ; + +struct tioca_kernel { + struct tioca_common *ca_common; /* tioca this belongs to */ + struct list_head ca_list; /* list of all ca's */ + struct list_head ca_dmamaps; + spinlock_t ca_lock; /* Kernel lock */ + cnodeid_t ca_closest_node; + struct list_head *ca_devices; /* bus->devices */ + + /* + * General GART stuff + */ + u64 ca_ap_size; /* size of aperature in bytes */ + u32 ca_gart_entries; /* # u64 entries in gart */ + u32 ca_ap_pagesize; /* aperature page size in bytes */ + u64 ca_ap_bus_base; /* bus address of CA aperature */ + u64 ca_gart_size; /* gart size in bytes */ + u64 *ca_gart; /* gart table vaddr */ + u64 ca_gart_coretalk_addr; /* gart coretalk addr */ + u8 ca_gart_iscoherent; /* used in tioca_tlbflush */ + + /* PCI GART convenience values */ + u64 ca_pciap_base; /* pci aperature bus base address */ + u64 ca_pciap_size; /* pci aperature size (bytes) */ + u64 ca_pcigart_base; /* gfx GART bus base address */ + u64 *ca_pcigart; /* gfx GART vm address */ + u32 ca_pcigart_entries; + u32 ca_pcigart_start; /* PCI start index in ca_gart */ + void *ca_pcigart_pagemap; + + /* AGP GART convenience values */ + u64 ca_gfxap_base; /* gfx aperature bus base address */ + u64 ca_gfxap_size; /* gfx aperature size (bytes) */ + u64 ca_gfxgart_base; /* gfx GART bus base address */ + u64 *ca_gfxgart; /* gfx GART vm address */ + u32 ca_gfxgart_entries; + u32 ca_gfxgart_start; /* agpgart start index in ca_gart */ +}; + +/* + * Common tioca info shared between kernel and prom + * + * DO NOT CHANGE THIS STRUCT WITHOUT MAKING CORRESPONDING CHANGES + * TO THE PROM VERSION. + */ + +struct tioca_common { + struct pcibus_bussoft ca_common; /* common pciio header */ + + u32 ca_rev; + u32 ca_closest_nasid; + + u64 ca_prom_private; + u64 ca_kernel_private; +}; + +/** + * tioca_paddr_to_gart - Convert an SGI coretalk address to a CA GART entry + * @paddr: page address to convert + * + * Convert a system [coretalk] address to a GART entry. GART entries are + * formed using the following: + * + * data = ( (1<<63) | ( (REMAP_NODE_ID << 40) | (MD_CHIPLET_ID << 38) | + * (REMAP_SYS_ADDR) ) >> 12 ) + * + * DATA written to 1 GART TABLE Entry in system memory is remapped system + * addr for 1 page + * + * The data is for coretalk address format right shifted 12 bits with a + * valid bit. + * + * GART_TABLE_ENTRY [ 25:0 ] -- REMAP_SYS_ADDRESS[37:12]. + * GART_TABLE_ENTRY [ 27:26 ] -- SHUB MD chiplet id. + * GART_TABLE_ENTRY [ 41:28 ] -- REMAP_NODE_ID. + * GART_TABLE_ENTRY [ 63 ] -- Valid Bit + */ +static inline u64 +tioca_paddr_to_gart(unsigned long paddr) +{ + /* + * We are assuming right now that paddr already has the correct + * format since the address from xtalk_dmaXXX should already have + * NODE_ID, CHIPLET_ID, and SYS_ADDR in the correct locations. + */ + + return ((paddr) >> 12) | (1UL << 63); +} + +/** + * tioca_physpage_to_gart - Map a host physical page for SGI CA based DMA + * @page_addr: system page address to map + */ + +static inline unsigned long +tioca_physpage_to_gart(u64 page_addr) +{ + u64 coretalk_addr; + + coretalk_addr = PHYS_TO_TIODMA(page_addr); + if (!coretalk_addr) { + return 0; + } + + return tioca_paddr_to_gart(coretalk_addr); +} + +/** + * tioca_tlbflush - invalidate cached SGI CA GART TLB entries + * @tioca_kernel: CA context + * + * Invalidate tlb entries for a given CA GART. Main complexity is to account + * for revA bug. + */ +static inline void +tioca_tlbflush(struct tioca_kernel *tioca_kernel) +{ + volatile u64 tmp; + volatile struct tioca __iomem *ca_base; + struct tioca_common *tioca_common; + + tioca_common = tioca_kernel->ca_common; + ca_base = (struct tioca __iomem *)tioca_common->ca_common.bs_base; + + /* + * Explicit flushes not needed if GART is in cached mode + */ + if (tioca_kernel->ca_gart_iscoherent) { + if (TIOCA_WAR_ENABLED(PV910244, tioca_common)) { + /* + * PV910244: RevA CA needs explicit flushes. + * Need to put GART into uncached mode before + * flushing otherwise the explicit flush is ignored. + * + * Alternate WAR would be to leave GART cached and + * touch every CL aligned GART entry. + */ + + __sn_clrq_relaxed(&ca_base->ca_control2, CA_GART_MEM_PARAM); + __sn_setq_relaxed(&ca_base->ca_control2, CA_GART_FLUSH_TLB); + __sn_setq_relaxed(&ca_base->ca_control2, + (0x2ull << CA_GART_MEM_PARAM_SHFT)); + tmp = __sn_readq_relaxed(&ca_base->ca_control2); + } + + return; + } + + /* + * Gart in uncached mode ... need an explicit flush. + */ + + __sn_setq_relaxed(&ca_base->ca_control2, CA_GART_FLUSH_TLB); + tmp = __sn_readq_relaxed(&ca_base->ca_control2); +} + +extern u32 tioca_gart_found; +extern struct list_head tioca_list; +extern int tioca_init_provider(void); +extern void tioca_fastwrite_enable(struct tioca_kernel *tioca_kern); +#endif /* _ASM_IA64_SN_TIO_CA_AGP_PROVIDER_H */ |