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/*
* 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 */
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