12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds ** System Bus Adapter (SBA) I/O MMU manager 41da177e4SLinus Torvalds ** 51da177e4SLinus Torvalds ** (c) Copyright 2000-2004 Grant Grundler <grundler @ parisc-linux x org> 61da177e4SLinus Torvalds ** (c) Copyright 2004 Naresh Kumar Inna <knaresh at india x hp x com> 71da177e4SLinus Torvalds ** (c) Copyright 2000-2004 Hewlett-Packard Company 81da177e4SLinus Torvalds ** 91da177e4SLinus Torvalds ** Portions (c) 1999 Dave S. Miller (from sparc64 I/O MMU code) 101da177e4SLinus Torvalds ** 111da177e4SLinus Torvalds ** 121da177e4SLinus Torvalds ** 131da177e4SLinus Torvalds ** This module initializes the IOC (I/O Controller) found on B1000/C3000/ 141da177e4SLinus Torvalds ** J5000/J7000/N-class/L-class machines and their successors. 151da177e4SLinus Torvalds ** 161da177e4SLinus Torvalds ** FIXME: add DMA hint support programming in both sba and lba modules. 171da177e4SLinus Torvalds */ 181da177e4SLinus Torvalds 191da177e4SLinus Torvalds #include <linux/types.h> 201da177e4SLinus Torvalds #include <linux/kernel.h> 211da177e4SLinus Torvalds #include <linux/spinlock.h> 221da177e4SLinus Torvalds #include <linux/slab.h> 231da177e4SLinus Torvalds #include <linux/init.h> 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds #include <linux/mm.h> 261da177e4SLinus Torvalds #include <linux/string.h> 271da177e4SLinus Torvalds #include <linux/pci.h> 280a0f0d8bSChristoph Hellwig #include <linux/dma-map-ops.h> 29b61e8f48SFUJITA Tomonori #include <linux/scatterlist.h> 3046663448SFUJITA Tomonori #include <linux/iommu-helper.h> 3177bfc8bdSLinus Walleij /* 3277bfc8bdSLinus Walleij * The semantics of 64 register access on 32bit systems can't be guaranteed 3377bfc8bdSLinus Walleij * by the C standard, we hope the _lo_hi() macros defining readq and writeq 3477bfc8bdSLinus Walleij * here will behave as expected. 3577bfc8bdSLinus Walleij */ 3677bfc8bdSLinus Walleij #include <linux/io-64-nonatomic-lo-hi.h> 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds #include <asm/byteorder.h> 391da177e4SLinus Torvalds #include <asm/io.h> 401da177e4SLinus Torvalds #include <asm/dma.h> /* for DMA_CHUNK_SIZE */ 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds #include <asm/hardware.h> /* for register_parisc_driver() stuff */ 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #include <linux/proc_fs.h> 457ec14e49SKyle McMartin #include <linux/seq_file.h> 466caddf0aSPaul Gortmaker #include <linux/module.h> 477ec14e49SKyle McMartin 481790cf91SKyle McMartin #include <asm/ropes.h> 494a8a0788SRolf Eike Beer #include <asm/page.h> /* for PAGE0 */ 501da177e4SLinus Torvalds #include <asm/pdc.h> /* for PDC_MODEL_* */ 511da177e4SLinus Torvalds #include <asm/pdcpat.h> /* for is_pdc_pat() */ 521da177e4SLinus Torvalds #include <asm/parisc-device.h> 531da177e4SLinus Torvalds 549b8eeab0SChristoph Hellwig #include "iommu.h" 559b8eeab0SChristoph Hellwig 561da177e4SLinus Torvalds #define MODULE_NAME "SBA" 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds /* 591da177e4SLinus Torvalds ** The number of debug flags is a clue - this code is fragile. 601da177e4SLinus Torvalds ** Don't even think about messing with it unless you have 611da177e4SLinus Torvalds ** plenty of 710's to sacrifice to the computer gods. :^) 621da177e4SLinus Torvalds */ 631da177e4SLinus Torvalds #undef DEBUG_SBA_INIT 641da177e4SLinus Torvalds #undef DEBUG_SBA_RUN 651da177e4SLinus Torvalds #undef DEBUG_SBA_RUN_SG 661da177e4SLinus Torvalds #undef DEBUG_SBA_RESOURCE 671da177e4SLinus Torvalds #undef ASSERT_PDIR_SANITY 681da177e4SLinus Torvalds #undef DEBUG_LARGE_SG_ENTRIES 691da177e4SLinus Torvalds #undef DEBUG_DMB_TRAP 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds #ifdef DEBUG_SBA_INIT 721da177e4SLinus Torvalds #define DBG_INIT(x...) printk(x) 731da177e4SLinus Torvalds #else 741da177e4SLinus Torvalds #define DBG_INIT(x...) 751da177e4SLinus Torvalds #endif 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds #ifdef DEBUG_SBA_RUN 781da177e4SLinus Torvalds #define DBG_RUN(x...) printk(x) 791da177e4SLinus Torvalds #else 801da177e4SLinus Torvalds #define DBG_RUN(x...) 811da177e4SLinus Torvalds #endif 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds #ifdef DEBUG_SBA_RUN_SG 841da177e4SLinus Torvalds #define DBG_RUN_SG(x...) printk(x) 851da177e4SLinus Torvalds #else 861da177e4SLinus Torvalds #define DBG_RUN_SG(x...) 871da177e4SLinus Torvalds #endif 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds #ifdef DEBUG_SBA_RESOURCE 911da177e4SLinus Torvalds #define DBG_RES(x...) printk(x) 921da177e4SLinus Torvalds #else 931da177e4SLinus Torvalds #define DBG_RES(x...) 941da177e4SLinus Torvalds #endif 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds #define DEFAULT_DMA_HINT_REG 0 971da177e4SLinus Torvalds 9808a64368SKyle McMartin struct sba_device *sba_list; 9908a64368SKyle McMartin EXPORT_SYMBOL_GPL(sba_list); 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds static unsigned long ioc_needs_fdc = 0; 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds /* global count of IOMMUs in the system */ 1041da177e4SLinus Torvalds static unsigned int global_ioc_cnt = 0; 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds /* PA8700 (Piranha 2.2) bug workaround */ 1071da177e4SLinus Torvalds static unsigned long piranha_bad_128k = 0; 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds /* Looks nice and keeps the compiler happy */ 1101da177e4SLinus Torvalds #define SBA_DEV(d) ((struct sba_device *) (d)) 1111da177e4SLinus Torvalds 11208a64368SKyle McMartin #ifdef CONFIG_AGP_PARISC 11308a64368SKyle McMartin #define SBA_AGP_SUPPORT 11408a64368SKyle McMartin #endif /*CONFIG_AGP_PARISC*/ 11508a64368SKyle McMartin 11664908ad9SGrant Grundler #ifdef SBA_AGP_SUPPORT 11708a64368SKyle McMartin static int sba_reserve_agpgart = 1; 11829a1e1d2SRandy Dunlap module_param(sba_reserve_agpgart, int, 0444); 11908a64368SKyle McMartin MODULE_PARM_DESC(sba_reserve_agpgart, "Reserve half of IO pdir as AGPGART"); 1201da177e4SLinus Torvalds #endif 1211da177e4SLinus Torvalds 12277e0ddf0SHelge Deller static struct proc_dir_entry *proc_runway_root __ro_after_init; 1236428bc7bSHelge Deller static struct proc_dir_entry *proc_mckinley_root __ro_after_init; 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds /************************************ 1261da177e4SLinus Torvalds ** SBA register read and write support 1271da177e4SLinus Torvalds ** 1281da177e4SLinus Torvalds ** BE WARNED: register writes are posted. 1291da177e4SLinus Torvalds ** (ie follow writes which must reach HW with a read) 1301da177e4SLinus Torvalds ** 1311da177e4SLinus Torvalds ** Superdome (in particular, REO) allows only 64-bit CSR accesses. 1321da177e4SLinus Torvalds */ 13340d78de1SGrant Grundler #define READ_REG32(addr) readl(addr) 13440d78de1SGrant Grundler #define READ_REG64(addr) readq(addr) 13540d78de1SGrant Grundler #define WRITE_REG32(val, addr) writel((val), (addr)) 13640d78de1SGrant Grundler #define WRITE_REG64(val, addr) writeq((val), (addr)) 1371da177e4SLinus Torvalds 13864908ad9SGrant Grundler #ifdef CONFIG_64BIT 1391da177e4SLinus Torvalds #define READ_REG(addr) READ_REG64(addr) 1401da177e4SLinus Torvalds #define WRITE_REG(value, addr) WRITE_REG64(value, addr) 1411da177e4SLinus Torvalds #else 1421da177e4SLinus Torvalds #define READ_REG(addr) READ_REG32(addr) 1431da177e4SLinus Torvalds #define WRITE_REG(value, addr) WRITE_REG32(value, addr) 1441da177e4SLinus Torvalds #endif 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds #ifdef DEBUG_SBA_INIT 1471da177e4SLinus Torvalds 14864908ad9SGrant Grundler /* NOTE: When CONFIG_64BIT isn't defined, READ_REG64() is two 32-bit reads */ 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds /** 1511da177e4SLinus Torvalds * sba_dump_ranges - debugging only - print ranges assigned to this IOA 1521da177e4SLinus Torvalds * @hpa: base address of the sba 1531da177e4SLinus Torvalds * 1541da177e4SLinus Torvalds * Print the MMIO and IO Port address ranges forwarded by an Astro/Ike/RIO 1551da177e4SLinus Torvalds * IO Adapter (aka Bus Converter). 1561da177e4SLinus Torvalds */ 1571da177e4SLinus Torvalds static void 1581da177e4SLinus Torvalds sba_dump_ranges(void __iomem *hpa) 1591da177e4SLinus Torvalds { 1601da177e4SLinus Torvalds DBG_INIT("SBA at 0x%p\n", hpa); 1611da177e4SLinus Torvalds DBG_INIT("IOS_DIST_BASE : %Lx\n", READ_REG64(hpa+IOS_DIST_BASE)); 1621da177e4SLinus Torvalds DBG_INIT("IOS_DIST_MASK : %Lx\n", READ_REG64(hpa+IOS_DIST_MASK)); 1631da177e4SLinus Torvalds DBG_INIT("IOS_DIST_ROUTE : %Lx\n", READ_REG64(hpa+IOS_DIST_ROUTE)); 1641da177e4SLinus Torvalds DBG_INIT("\n"); 1651da177e4SLinus Torvalds DBG_INIT("IOS_DIRECT_BASE : %Lx\n", READ_REG64(hpa+IOS_DIRECT_BASE)); 1661da177e4SLinus Torvalds DBG_INIT("IOS_DIRECT_MASK : %Lx\n", READ_REG64(hpa+IOS_DIRECT_MASK)); 1671da177e4SLinus Torvalds DBG_INIT("IOS_DIRECT_ROUTE: %Lx\n", READ_REG64(hpa+IOS_DIRECT_ROUTE)); 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds /** 1711da177e4SLinus Torvalds * sba_dump_tlb - debugging only - print IOMMU operating parameters 1721da177e4SLinus Torvalds * @hpa: base address of the IOMMU 1731da177e4SLinus Torvalds * 1741da177e4SLinus Torvalds * Print the size/location of the IO MMU PDIR. 1751da177e4SLinus Torvalds */ 1761da177e4SLinus Torvalds static void sba_dump_tlb(void __iomem *hpa) 1771da177e4SLinus Torvalds { 1781da177e4SLinus Torvalds DBG_INIT("IO TLB at 0x%p\n", hpa); 1791da177e4SLinus Torvalds DBG_INIT("IOC_IBASE : 0x%Lx\n", READ_REG64(hpa+IOC_IBASE)); 1801da177e4SLinus Torvalds DBG_INIT("IOC_IMASK : 0x%Lx\n", READ_REG64(hpa+IOC_IMASK)); 1811da177e4SLinus Torvalds DBG_INIT("IOC_TCNFG : 0x%Lx\n", READ_REG64(hpa+IOC_TCNFG)); 1821da177e4SLinus Torvalds DBG_INIT("IOC_PDIR_BASE: 0x%Lx\n", READ_REG64(hpa+IOC_PDIR_BASE)); 1831da177e4SLinus Torvalds DBG_INIT("\n"); 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds #else 1861da177e4SLinus Torvalds #define sba_dump_ranges(x) 1871da177e4SLinus Torvalds #define sba_dump_tlb(x) 18864908ad9SGrant Grundler #endif /* DEBUG_SBA_INIT */ 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds #ifdef ASSERT_PDIR_SANITY 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds /** 1941da177e4SLinus Torvalds * sba_dump_pdir_entry - debugging only - print one IOMMU PDIR entry 1951da177e4SLinus Torvalds * @ioc: IO MMU structure which owns the pdir we are interested in. 1961da177e4SLinus Torvalds * @msg: text to print ont the output line. 1971da177e4SLinus Torvalds * @pide: pdir index. 1981da177e4SLinus Torvalds * 1991da177e4SLinus Torvalds * Print one entry of the IO MMU PDIR in human readable form. 2001da177e4SLinus Torvalds */ 2011da177e4SLinus Torvalds static void 2021da177e4SLinus Torvalds sba_dump_pdir_entry(struct ioc *ioc, char *msg, uint pide) 2031da177e4SLinus Torvalds { 2041da177e4SLinus Torvalds /* start printing from lowest pde in rval */ 205c1ebb940SHelge Deller __le64 *ptr = &(ioc->pdir_base[pide & (~0U * BITS_PER_LONG)]); 2061da177e4SLinus Torvalds unsigned long *rptr = (unsigned long *) &(ioc->res_map[(pide >>3) & ~(sizeof(unsigned long) - 1)]); 2071da177e4SLinus Torvalds uint rcnt; 2081da177e4SLinus Torvalds 2091da177e4SLinus Torvalds printk(KERN_DEBUG "SBA: %s rp %p bit %d rval 0x%lx\n", 2101da177e4SLinus Torvalds msg, 2111da177e4SLinus Torvalds rptr, pide & (BITS_PER_LONG - 1), *rptr); 2121da177e4SLinus Torvalds 2131da177e4SLinus Torvalds rcnt = 0; 2141da177e4SLinus Torvalds while (rcnt < BITS_PER_LONG) { 2151da177e4SLinus Torvalds printk(KERN_DEBUG "%s %2d %p %016Lx\n", 2161da177e4SLinus Torvalds (rcnt == (pide & (BITS_PER_LONG - 1))) 2171da177e4SLinus Torvalds ? " -->" : " ", 2181da177e4SLinus Torvalds rcnt, ptr, *ptr ); 2191da177e4SLinus Torvalds rcnt++; 2201da177e4SLinus Torvalds ptr++; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds printk(KERN_DEBUG "%s", msg); 2231da177e4SLinus Torvalds } 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds /** 2271da177e4SLinus Torvalds * sba_check_pdir - debugging only - consistency checker 2281da177e4SLinus Torvalds * @ioc: IO MMU structure which owns the pdir we are interested in. 2291da177e4SLinus Torvalds * @msg: text to print ont the output line. 2301da177e4SLinus Torvalds * 2311da177e4SLinus Torvalds * Verify the resource map and pdir state is consistent 2321da177e4SLinus Torvalds */ 2331da177e4SLinus Torvalds static int 2341da177e4SLinus Torvalds sba_check_pdir(struct ioc *ioc, char *msg) 2351da177e4SLinus Torvalds { 2361da177e4SLinus Torvalds u32 *rptr_end = (u32 *) &(ioc->res_map[ioc->res_size]); 2371da177e4SLinus Torvalds u32 *rptr = (u32 *) ioc->res_map; /* resource map ptr */ 2381da177e4SLinus Torvalds u64 *pptr = ioc->pdir_base; /* pdir ptr */ 2391da177e4SLinus Torvalds uint pide = 0; 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds while (rptr < rptr_end) { 2421da177e4SLinus Torvalds u32 rval = *rptr; 2431da177e4SLinus Torvalds int rcnt = 32; /* number of bits we might check */ 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds while (rcnt) { 2461da177e4SLinus Torvalds /* Get last byte and highest bit from that */ 2471da177e4SLinus Torvalds u32 pde = ((u32) (((char *)pptr)[7])) << 24; 2481da177e4SLinus Torvalds if ((rval ^ pde) & 0x80000000) 2491da177e4SLinus Torvalds { 2501da177e4SLinus Torvalds /* 2511da177e4SLinus Torvalds ** BUMMER! -- res_map != pdir -- 2521da177e4SLinus Torvalds ** Dump rval and matching pdir entries 2531da177e4SLinus Torvalds */ 2541da177e4SLinus Torvalds sba_dump_pdir_entry(ioc, msg, pide); 2551da177e4SLinus Torvalds return(1); 2561da177e4SLinus Torvalds } 2571da177e4SLinus Torvalds rcnt--; 2581da177e4SLinus Torvalds rval <<= 1; /* try the next bit */ 2591da177e4SLinus Torvalds pptr++; 2601da177e4SLinus Torvalds pide++; 2611da177e4SLinus Torvalds } 2621da177e4SLinus Torvalds rptr++; /* look at next word of res_map */ 2631da177e4SLinus Torvalds } 2641da177e4SLinus Torvalds /* It'd be nice if we always got here :^) */ 2651da177e4SLinus Torvalds return 0; 2661da177e4SLinus Torvalds } 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds /** 2701da177e4SLinus Torvalds * sba_dump_sg - debugging only - print Scatter-Gather list 2711da177e4SLinus Torvalds * @ioc: IO MMU structure which owns the pdir we are interested in. 2721da177e4SLinus Torvalds * @startsg: head of the SG list 2731da177e4SLinus Torvalds * @nents: number of entries in SG list 2741da177e4SLinus Torvalds * 2751da177e4SLinus Torvalds * print the SG list so we can verify it's correct by hand. 2761da177e4SLinus Torvalds */ 2771da177e4SLinus Torvalds static void 2781da177e4SLinus Torvalds sba_dump_sg( struct ioc *ioc, struct scatterlist *startsg, int nents) 2791da177e4SLinus Torvalds { 2801da177e4SLinus Torvalds while (nents-- > 0) { 2811da177e4SLinus Torvalds printk(KERN_DEBUG " %d : %08lx/%05x %p/%05x\n", 2821da177e4SLinus Torvalds nents, 2831da177e4SLinus Torvalds (unsigned long) sg_dma_address(startsg), 2841da177e4SLinus Torvalds sg_dma_len(startsg), 2858bf8a1d1SMatthew Wilcox sg_virt(startsg), startsg->length); 2861da177e4SLinus Torvalds startsg++; 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds } 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds #endif /* ASSERT_PDIR_SANITY */ 2911da177e4SLinus Torvalds 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds /************************************************************** 2961da177e4SLinus Torvalds * 2971da177e4SLinus Torvalds * I/O Pdir Resource Management 2981da177e4SLinus Torvalds * 2991da177e4SLinus Torvalds * Bits set in the resource map are in use. 3001da177e4SLinus Torvalds * Each bit can represent a number of pages. 3011da177e4SLinus Torvalds * LSbs represent lower addresses (IOVA's). 3021da177e4SLinus Torvalds * 3031da177e4SLinus Torvalds ***************************************************************/ 3041da177e4SLinus Torvalds #define PAGES_PER_RANGE 1 /* could increase this to 4 or 8 if needed */ 3051da177e4SLinus Torvalds 3061da177e4SLinus Torvalds /* Convert from IOVP to IOVA and vice versa. */ 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds #ifdef ZX1_SUPPORT 3091da177e4SLinus Torvalds /* Pluto (aka ZX1) boxes need to set or clear the ibase bits appropriately */ 3101da177e4SLinus Torvalds #define SBA_IOVA(ioc,iovp,offset,hint_reg) ((ioc->ibase) | (iovp) | (offset)) 3111da177e4SLinus Torvalds #define SBA_IOVP(ioc,iova) ((iova) & (ioc)->iovp_mask) 3121da177e4SLinus Torvalds #else 3131da177e4SLinus Torvalds /* only support Astro and ancestors. Saves a few cycles in key places */ 3141da177e4SLinus Torvalds #define SBA_IOVA(ioc,iovp,offset,hint_reg) ((iovp) | (offset)) 3151da177e4SLinus Torvalds #define SBA_IOVP(ioc,iova) (iova) 3161da177e4SLinus Torvalds #endif 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds #define PDIR_INDEX(iovp) ((iovp)>>IOVP_SHIFT) 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds #define RESMAP_MASK(n) (~0UL << (BITS_PER_LONG - (n))) 3211da177e4SLinus Torvalds #define RESMAP_IDX_MASK (sizeof(unsigned long) - 1) 3221da177e4SLinus Torvalds 32356ee0cfdSFUJITA Tomonori static unsigned long ptr_to_pide(struct ioc *ioc, unsigned long *res_ptr, 32446663448SFUJITA Tomonori unsigned int bitshiftcnt) 32546663448SFUJITA Tomonori { 32646663448SFUJITA Tomonori return (((unsigned long)res_ptr - (unsigned long)ioc->res_map) << 3) 32746663448SFUJITA Tomonori + bitshiftcnt; 32846663448SFUJITA Tomonori } 3291da177e4SLinus Torvalds 3301da177e4SLinus Torvalds /** 3311da177e4SLinus Torvalds * sba_search_bitmap - find free space in IO PDIR resource bitmap 3321da177e4SLinus Torvalds * @ioc: IO MMU structure which owns the pdir we are interested in. 333226b8ab8SHelge Deller * @dev: device to query the bitmap for 3341da177e4SLinus Torvalds * @bits_wanted: number of entries we need. 3351da177e4SLinus Torvalds * 3361da177e4SLinus Torvalds * Find consecutive free bits in resource bitmap. 3371da177e4SLinus Torvalds * Each bit represents one entry in the IO Pdir. 3381da177e4SLinus Torvalds * Cool perf optimization: search for log2(size) bits at a time. 3391da177e4SLinus Torvalds */ 340226b8ab8SHelge Deller static unsigned long 34146663448SFUJITA Tomonori sba_search_bitmap(struct ioc *ioc, struct device *dev, 34246663448SFUJITA Tomonori unsigned long bits_wanted) 3431da177e4SLinus Torvalds { 3441da177e4SLinus Torvalds unsigned long *res_ptr = ioc->res_hint; 3451da177e4SLinus Torvalds unsigned long *res_end = (unsigned long *) &(ioc->res_map[ioc->res_size]); 34646663448SFUJITA Tomonori unsigned long pide = ~0UL, tpide; 34746663448SFUJITA Tomonori unsigned long boundary_size; 34846663448SFUJITA Tomonori unsigned long shift; 34946663448SFUJITA Tomonori int ret; 35046663448SFUJITA Tomonori 3511e9d90dbSNicolin Chen boundary_size = dma_get_seg_boundary_nr_pages(dev, IOVP_SHIFT); 35246663448SFUJITA Tomonori 35346663448SFUJITA Tomonori #if defined(ZX1_SUPPORT) 35446663448SFUJITA Tomonori BUG_ON(ioc->ibase & ~IOVP_MASK); 35546663448SFUJITA Tomonori shift = ioc->ibase >> IOVP_SHIFT; 35646663448SFUJITA Tomonori #else 35746663448SFUJITA Tomonori shift = 0; 35846663448SFUJITA Tomonori #endif 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds if (bits_wanted > (BITS_PER_LONG/2)) { 3611da177e4SLinus Torvalds /* Search word at a time - no mask needed */ 3621da177e4SLinus Torvalds for(; res_ptr < res_end; ++res_ptr) { 36346663448SFUJITA Tomonori tpide = ptr_to_pide(ioc, res_ptr, 0); 36446663448SFUJITA Tomonori ret = iommu_is_span_boundary(tpide, bits_wanted, 36546663448SFUJITA Tomonori shift, 36646663448SFUJITA Tomonori boundary_size); 36746663448SFUJITA Tomonori if ((*res_ptr == 0) && !ret) { 3681da177e4SLinus Torvalds *res_ptr = RESMAP_MASK(bits_wanted); 36946663448SFUJITA Tomonori pide = tpide; 3701da177e4SLinus Torvalds break; 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds } 3731da177e4SLinus Torvalds /* point to the next word on next pass */ 3741da177e4SLinus Torvalds res_ptr++; 3751da177e4SLinus Torvalds ioc->res_bitshift = 0; 3761da177e4SLinus Torvalds } else { 3771da177e4SLinus Torvalds /* 3781da177e4SLinus Torvalds ** Search the resource bit map on well-aligned values. 3791da177e4SLinus Torvalds ** "o" is the alignment. 3801da177e4SLinus Torvalds ** We need the alignment to invalidate I/O TLB using 3811da177e4SLinus Torvalds ** SBA HW features in the unmap path. 3821da177e4SLinus Torvalds */ 3831da177e4SLinus Torvalds unsigned long o = 1 << get_order(bits_wanted << PAGE_SHIFT); 3843cb1d958SMilind Arun Choudhary uint bitshiftcnt = ALIGN(ioc->res_bitshift, o); 3851da177e4SLinus Torvalds unsigned long mask; 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds if (bitshiftcnt >= BITS_PER_LONG) { 3881da177e4SLinus Torvalds bitshiftcnt = 0; 3891da177e4SLinus Torvalds res_ptr++; 3901da177e4SLinus Torvalds } 3911da177e4SLinus Torvalds mask = RESMAP_MASK(bits_wanted) >> bitshiftcnt; 3921da177e4SLinus Torvalds 393a8043ecbSHarvey Harrison DBG_RES("%s() o %ld %p", __func__, o, res_ptr); 3941da177e4SLinus Torvalds while(res_ptr < res_end) 3951da177e4SLinus Torvalds { 3961da177e4SLinus Torvalds DBG_RES(" %p %lx %lx\n", res_ptr, mask, *res_ptr); 3971da177e4SLinus Torvalds WARN_ON(mask == 0); 39846663448SFUJITA Tomonori tpide = ptr_to_pide(ioc, res_ptr, bitshiftcnt); 39946663448SFUJITA Tomonori ret = iommu_is_span_boundary(tpide, bits_wanted, 40046663448SFUJITA Tomonori shift, 40146663448SFUJITA Tomonori boundary_size); 40246663448SFUJITA Tomonori if ((((*res_ptr) & mask) == 0) && !ret) { 4031da177e4SLinus Torvalds *res_ptr |= mask; /* mark resources busy! */ 40446663448SFUJITA Tomonori pide = tpide; 4051da177e4SLinus Torvalds break; 4061da177e4SLinus Torvalds } 4071da177e4SLinus Torvalds mask >>= o; 4081da177e4SLinus Torvalds bitshiftcnt += o; 4091da177e4SLinus Torvalds if (mask == 0) { 4101da177e4SLinus Torvalds mask = RESMAP_MASK(bits_wanted); 4111da177e4SLinus Torvalds bitshiftcnt=0; 4121da177e4SLinus Torvalds res_ptr++; 4131da177e4SLinus Torvalds } 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds /* look in the same word on the next pass */ 4161da177e4SLinus Torvalds ioc->res_bitshift = bitshiftcnt + bits_wanted; 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds /* wrapped ? */ 4201da177e4SLinus Torvalds if (res_end <= res_ptr) { 4211da177e4SLinus Torvalds ioc->res_hint = (unsigned long *) ioc->res_map; 4221da177e4SLinus Torvalds ioc->res_bitshift = 0; 4231da177e4SLinus Torvalds } else { 4241da177e4SLinus Torvalds ioc->res_hint = res_ptr; 4251da177e4SLinus Torvalds } 4261da177e4SLinus Torvalds return (pide); 4271da177e4SLinus Torvalds } 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds /** 4311da177e4SLinus Torvalds * sba_alloc_range - find free bits and mark them in IO PDIR resource bitmap 4321da177e4SLinus Torvalds * @ioc: IO MMU structure which owns the pdir we are interested in. 433226b8ab8SHelge Deller * @dev: device for which pages should be alloced 4341da177e4SLinus Torvalds * @size: number of bytes to create a mapping for 4351da177e4SLinus Torvalds * 4361da177e4SLinus Torvalds * Given a size, find consecutive unmarked and then mark those bits in the 4371da177e4SLinus Torvalds * resource bit map. 4381da177e4SLinus Torvalds */ 4391da177e4SLinus Torvalds static int 4407c8cda62SFUJITA Tomonori sba_alloc_range(struct ioc *ioc, struct device *dev, size_t size) 4411da177e4SLinus Torvalds { 4421da177e4SLinus Torvalds unsigned int pages_needed = size >> IOVP_SHIFT; 4431da177e4SLinus Torvalds #ifdef SBA_COLLECT_STATS 4441da177e4SLinus Torvalds unsigned long cr_start = mfctl(16); 4451da177e4SLinus Torvalds #endif 4461da177e4SLinus Torvalds unsigned long pide; 4471da177e4SLinus Torvalds 44846663448SFUJITA Tomonori pide = sba_search_bitmap(ioc, dev, pages_needed); 4491da177e4SLinus Torvalds if (pide >= (ioc->res_size << 3)) { 45046663448SFUJITA Tomonori pide = sba_search_bitmap(ioc, dev, pages_needed); 4511da177e4SLinus Torvalds if (pide >= (ioc->res_size << 3)) 4521da177e4SLinus Torvalds panic("%s: I/O MMU @ %p is out of mapping resources\n", 4531da177e4SLinus Torvalds __FILE__, ioc->ioc_hpa); 4541da177e4SLinus Torvalds } 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds #ifdef ASSERT_PDIR_SANITY 4571da177e4SLinus Torvalds /* verify the first enable bit is clear */ 4581da177e4SLinus Torvalds if(0x00 != ((u8 *) ioc->pdir_base)[pide*sizeof(u64) + 7]) { 4591da177e4SLinus Torvalds sba_dump_pdir_entry(ioc, "sba_search_bitmap() botched it?", pide); 4601da177e4SLinus Torvalds } 4611da177e4SLinus Torvalds #endif 4621da177e4SLinus Torvalds 4631da177e4SLinus Torvalds DBG_RES("%s(%x) %d -> %lx hint %x/%x\n", 464a8043ecbSHarvey Harrison __func__, size, pages_needed, pide, 4651da177e4SLinus Torvalds (uint) ((unsigned long) ioc->res_hint - (unsigned long) ioc->res_map), 4661da177e4SLinus Torvalds ioc->res_bitshift ); 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds #ifdef SBA_COLLECT_STATS 4691da177e4SLinus Torvalds { 4701da177e4SLinus Torvalds unsigned long cr_end = mfctl(16); 4711da177e4SLinus Torvalds unsigned long tmp = cr_end - cr_start; 4721da177e4SLinus Torvalds /* check for roll over */ 4731da177e4SLinus Torvalds cr_start = (cr_end < cr_start) ? -(tmp) : (tmp); 4741da177e4SLinus Torvalds } 4751da177e4SLinus Torvalds ioc->avg_search[ioc->avg_idx++] = cr_start; 4761da177e4SLinus Torvalds ioc->avg_idx &= SBA_SEARCH_SAMPLE - 1; 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds ioc->used_pages += pages_needed; 4791da177e4SLinus Torvalds #endif 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds return (pide); 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds 4851da177e4SLinus Torvalds /** 4861da177e4SLinus Torvalds * sba_free_range - unmark bits in IO PDIR resource bitmap 4871da177e4SLinus Torvalds * @ioc: IO MMU structure which owns the pdir we are interested in. 4881da177e4SLinus Torvalds * @iova: IO virtual address which was previously allocated. 4891da177e4SLinus Torvalds * @size: number of bytes to create a mapping for 4901da177e4SLinus Torvalds * 4911da177e4SLinus Torvalds * clear bits in the ioc's resource map 4921da177e4SLinus Torvalds */ 493226b8ab8SHelge Deller static void 4941da177e4SLinus Torvalds sba_free_range(struct ioc *ioc, dma_addr_t iova, size_t size) 4951da177e4SLinus Torvalds { 4961da177e4SLinus Torvalds unsigned long iovp = SBA_IOVP(ioc, iova); 4971da177e4SLinus Torvalds unsigned int pide = PDIR_INDEX(iovp); 4981da177e4SLinus Torvalds unsigned int ridx = pide >> 3; /* convert bit to byte address */ 4991da177e4SLinus Torvalds unsigned long *res_ptr = (unsigned long *) &((ioc)->res_map[ridx & ~RESMAP_IDX_MASK]); 5001da177e4SLinus Torvalds 5011da177e4SLinus Torvalds int bits_not_wanted = size >> IOVP_SHIFT; 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds /* 3-bits "bit" address plus 2 (or 3) bits for "byte" == bit in word */ 5041da177e4SLinus Torvalds unsigned long m = RESMAP_MASK(bits_not_wanted) >> (pide & (BITS_PER_LONG - 1)); 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds DBG_RES("%s( ,%x,%x) %x/%lx %x %p %lx\n", 507a8043ecbSHarvey Harrison __func__, (uint) iova, size, 5081da177e4SLinus Torvalds bits_not_wanted, m, pide, res_ptr, *res_ptr); 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds #ifdef SBA_COLLECT_STATS 5111da177e4SLinus Torvalds ioc->used_pages -= bits_not_wanted; 5121da177e4SLinus Torvalds #endif 5131da177e4SLinus Torvalds 5141da177e4SLinus Torvalds *res_ptr &= ~m; 5151da177e4SLinus Torvalds } 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds /************************************************************** 5191da177e4SLinus Torvalds * 5201da177e4SLinus Torvalds * "Dynamic DMA Mapping" support (aka "Coherent I/O") 5211da177e4SLinus Torvalds * 5221da177e4SLinus Torvalds ***************************************************************/ 5231da177e4SLinus Torvalds 52464908ad9SGrant Grundler #ifdef SBA_HINT_SUPPORT 5251da177e4SLinus Torvalds #define SBA_DMA_HINT(ioc, val) ((val) << (ioc)->hint_shift_pdir) 5261da177e4SLinus Torvalds #endif 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds typedef unsigned long space_t; 5291da177e4SLinus Torvalds #define KERNEL_SPACE 0 5301da177e4SLinus Torvalds 5311da177e4SLinus Torvalds /** 5321da177e4SLinus Torvalds * sba_io_pdir_entry - fill in one IO PDIR entry 5331da177e4SLinus Torvalds * @pdir_ptr: pointer to IO PDIR entry 5341da177e4SLinus Torvalds * @sid: process Space ID - currently only support KERNEL_SPACE 5351da177e4SLinus Torvalds * @vba: Virtual CPU address of buffer to map 5361da177e4SLinus Torvalds * @hint: DMA hint set to use for this mapping 5371da177e4SLinus Torvalds * 5381da177e4SLinus Torvalds * SBA Mapping Routine 5391da177e4SLinus Torvalds * 5401da177e4SLinus Torvalds * Given a virtual address (vba, arg2) and space id, (sid, arg1) 5411da177e4SLinus Torvalds * sba_io_pdir_entry() loads the I/O PDIR entry pointed to by 5421da177e4SLinus Torvalds * pdir_ptr (arg0). 5431da177e4SLinus Torvalds * Using the bass-ackwards HP bit numbering, Each IO Pdir entry 5441da177e4SLinus Torvalds * for Astro/Ike looks like: 5451da177e4SLinus Torvalds * 5461da177e4SLinus Torvalds * 5471da177e4SLinus Torvalds * 0 19 51 55 63 5481da177e4SLinus Torvalds * +-+---------------------+----------------------------------+----+--------+ 5491da177e4SLinus Torvalds * |V| U | PPN[43:12] | U | VI | 5501da177e4SLinus Torvalds * +-+---------------------+----------------------------------+----+--------+ 5511da177e4SLinus Torvalds * 5521da177e4SLinus Torvalds * Pluto is basically identical, supports fewer physical address bits: 5531da177e4SLinus Torvalds * 5541da177e4SLinus Torvalds * 0 23 51 55 63 5551da177e4SLinus Torvalds * +-+------------------------+-------------------------------+----+--------+ 5561da177e4SLinus Torvalds * |V| U | PPN[39:12] | U | VI | 5571da177e4SLinus Torvalds * +-+------------------------+-------------------------------+----+--------+ 5581da177e4SLinus Torvalds * 5591da177e4SLinus Torvalds * V == Valid Bit (Most Significant Bit is bit 0) 5601da177e4SLinus Torvalds * U == Unused 5611da177e4SLinus Torvalds * PPN == Physical Page Number 5621da177e4SLinus Torvalds * VI == Virtual Index (aka Coherent Index) 5631da177e4SLinus Torvalds * 5641da177e4SLinus Torvalds * LPA instruction output is put into PPN field. 5651da177e4SLinus Torvalds * LCI (Load Coherence Index) instruction provides the "VI" bits. 5661da177e4SLinus Torvalds * 5671da177e4SLinus Torvalds * We pre-swap the bytes since PCX-W is Big Endian and the 5681da177e4SLinus Torvalds * IOMMU uses little endian for the pdir. 5691da177e4SLinus Torvalds */ 5701da177e4SLinus Torvalds 571226b8ab8SHelge Deller static void 572c1ebb940SHelge Deller sba_io_pdir_entry(__le64 *pdir_ptr, space_t sid, unsigned long vba, 5731da177e4SLinus Torvalds unsigned long hint) 5741da177e4SLinus Torvalds { 5751da177e4SLinus Torvalds u64 pa; /* physical address */ 5761da177e4SLinus Torvalds register unsigned ci; /* coherent index */ 5771da177e4SLinus Torvalds 578116d7533SJohn David Anglin pa = lpa(vba); 5791da177e4SLinus Torvalds pa &= IOVP_MASK; 5801da177e4SLinus Torvalds 58163923d2cSJohn David Anglin asm("lci 0(%1), %0" : "=r" (ci) : "r" (vba)); 5826a45716aSHelge Deller pa |= (ci >> PAGE_SHIFT) & 0xff; /* move CI (8 bits) into lowest byte */ 5831da177e4SLinus Torvalds 584983daeecSKyle McMartin pa |= SBA_PDIR_VALID_BIT; /* set "valid" bit */ 5851da177e4SLinus Torvalds *pdir_ptr = cpu_to_le64(pa); /* swap and store into I/O Pdir */ 5861da177e4SLinus Torvalds 5871da177e4SLinus Torvalds /* 5881da177e4SLinus Torvalds * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set 5891da177e4SLinus Torvalds * (bit #61, big endian), we have to flush and sync every time 5901da177e4SLinus Torvalds * IO-PDIR is changed in Ike/Astro. 5911da177e4SLinus Torvalds */ 5923847dab7SHelge Deller asm_io_fdc(pdir_ptr); 5931da177e4SLinus Torvalds } 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds 5961da177e4SLinus Torvalds /** 5971da177e4SLinus Torvalds * sba_mark_invalid - invalidate one or more IO PDIR entries 5981da177e4SLinus Torvalds * @ioc: IO MMU structure which owns the pdir we are interested in. 5991da177e4SLinus Torvalds * @iova: IO Virtual Address mapped earlier 6001da177e4SLinus Torvalds * @byte_cnt: number of bytes this mapping covers. 6011da177e4SLinus Torvalds * 6021da177e4SLinus Torvalds * Marking the IO PDIR entry(ies) as Invalid and invalidate 6031da177e4SLinus Torvalds * corresponding IO TLB entry. The Ike PCOM (Purge Command Register) 6041da177e4SLinus Torvalds * is to purge stale entries in the IO TLB when unmapping entries. 6051da177e4SLinus Torvalds * 6061da177e4SLinus Torvalds * The PCOM register supports purging of multiple pages, with a minium 6071da177e4SLinus Torvalds * of 1 page and a maximum of 2GB. Hardware requires the address be 6081da177e4SLinus Torvalds * aligned to the size of the range being purged. The size of the range 6091da177e4SLinus Torvalds * must be a power of 2. The "Cool perf optimization" in the 6101da177e4SLinus Torvalds * allocation routine helps keep that true. 6111da177e4SLinus Torvalds */ 612226b8ab8SHelge Deller static void 6131da177e4SLinus Torvalds sba_mark_invalid(struct ioc *ioc, dma_addr_t iova, size_t byte_cnt) 6141da177e4SLinus Torvalds { 6151da177e4SLinus Torvalds u32 iovp = (u32) SBA_IOVP(ioc,iova); 616c1ebb940SHelge Deller __le64 *pdir_ptr = &ioc->pdir_base[PDIR_INDEX(iovp)]; 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds #ifdef ASSERT_PDIR_SANITY 61964908ad9SGrant Grundler /* Assert first pdir entry is set. 62064908ad9SGrant Grundler ** 62164908ad9SGrant Grundler ** Even though this is a big-endian machine, the entries 62264908ad9SGrant Grundler ** in the iopdir are little endian. That's why we look at 62364908ad9SGrant Grundler ** the byte at +7 instead of at +0. 62464908ad9SGrant Grundler */ 62564908ad9SGrant Grundler if (0x80 != (((u8 *) pdir_ptr)[7])) { 6261da177e4SLinus Torvalds sba_dump_pdir_entry(ioc,"sba_mark_invalid()", PDIR_INDEX(iovp)); 6271da177e4SLinus Torvalds } 6281da177e4SLinus Torvalds #endif 6291da177e4SLinus Torvalds 63064908ad9SGrant Grundler if (byte_cnt > IOVP_SIZE) 6311da177e4SLinus Torvalds { 63264908ad9SGrant Grundler #if 0 63364908ad9SGrant Grundler unsigned long entries_per_cacheline = ioc_needs_fdc ? 63464908ad9SGrant Grundler L1_CACHE_ALIGN(((unsigned long) pdir_ptr)) 63564908ad9SGrant Grundler - (unsigned long) pdir_ptr; 63664908ad9SGrant Grundler : 262144; 63764908ad9SGrant Grundler #endif 63864908ad9SGrant Grundler 63964908ad9SGrant Grundler /* set "size" field for PCOM */ 64064908ad9SGrant Grundler iovp |= get_order(byte_cnt) + PAGE_SHIFT; 64164908ad9SGrant Grundler 64264908ad9SGrant Grundler do { 64364908ad9SGrant Grundler /* clear I/O Pdir entry "valid" bit first */ 64464908ad9SGrant Grundler ((u8 *) pdir_ptr)[7] = 0; 6453847dab7SHelge Deller asm_io_fdc(pdir_ptr); 64664908ad9SGrant Grundler if (ioc_needs_fdc) { 64764908ad9SGrant Grundler #if 0 64864908ad9SGrant Grundler entries_per_cacheline = L1_CACHE_SHIFT - 3; 64964908ad9SGrant Grundler #endif 65064908ad9SGrant Grundler } 65164908ad9SGrant Grundler pdir_ptr++; 65264908ad9SGrant Grundler byte_cnt -= IOVP_SIZE; 65364908ad9SGrant Grundler } while (byte_cnt > IOVP_SIZE); 65464908ad9SGrant Grundler } else 6551da177e4SLinus Torvalds iovp |= IOVP_SHIFT; /* set "size" field for PCOM */ 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds /* 65864908ad9SGrant Grundler ** clear I/O PDIR entry "valid" bit. 65964908ad9SGrant Grundler ** We have to R/M/W the cacheline regardless how much of the 66064908ad9SGrant Grundler ** pdir entry that we clobber. 66164908ad9SGrant Grundler ** The rest of the entry would be useful for debugging if we 66264908ad9SGrant Grundler ** could dump core on HPMC. 6631da177e4SLinus Torvalds */ 66464908ad9SGrant Grundler ((u8 *) pdir_ptr)[7] = 0; 6653847dab7SHelge Deller asm_io_fdc(pdir_ptr); 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds WRITE_REG( SBA_IOVA(ioc, iovp, 0, 0), ioc->ioc_hpa+IOC_PCOM); 6681da177e4SLinus Torvalds } 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds /** 6711da177e4SLinus Torvalds * sba_dma_supported - PCI driver can query DMA support 6721da177e4SLinus Torvalds * @dev: instance of PCI owned by the driver that's asking 6731da177e4SLinus Torvalds * @mask: number of address bits this PCI device can handle 6741da177e4SLinus Torvalds * 675985098a0SMauro Carvalho Chehab * See Documentation/core-api/dma-api-howto.rst 6761da177e4SLinus Torvalds */ 6771da177e4SLinus Torvalds static int sba_dma_supported( struct device *dev, u64 mask) 6781da177e4SLinus Torvalds { 6791da177e4SLinus Torvalds struct ioc *ioc; 68064908ad9SGrant Grundler 6811da177e4SLinus Torvalds if (dev == NULL) { 6821da177e4SLinus Torvalds printk(KERN_ERR MODULE_NAME ": EISA/ISA/et al not supported\n"); 6831da177e4SLinus Torvalds BUG(); 6841da177e4SLinus Torvalds return(0); 6851da177e4SLinus Torvalds } 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds ioc = GET_IOC(dev); 68833f9e024SThomas Bogendoerfer if (!ioc) 68933f9e024SThomas Bogendoerfer return 0; 6901da177e4SLinus Torvalds 69164908ad9SGrant Grundler /* 69264908ad9SGrant Grundler * check if mask is >= than the current max IO Virt Address 69364908ad9SGrant Grundler * The max IO Virt address will *always* < 30 bits. 69464908ad9SGrant Grundler */ 69564908ad9SGrant Grundler return((int)(mask >= (ioc->ibase - 1 + 6961da177e4SLinus Torvalds (ioc->pdir_size / sizeof(u64) * IOVP_SIZE) ))); 6971da177e4SLinus Torvalds } 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds 7001da177e4SLinus Torvalds /** 7011da177e4SLinus Torvalds * sba_map_single - map one buffer and return IOVA for DMA 7021da177e4SLinus Torvalds * @dev: instance of PCI owned by the driver that's asking. 7031da177e4SLinus Torvalds * @addr: driver buffer to map. 7041da177e4SLinus Torvalds * @size: number of bytes to map in driver buffer. 7051da177e4SLinus Torvalds * @direction: R/W or both. 7061da177e4SLinus Torvalds * 707985098a0SMauro Carvalho Chehab * See Documentation/core-api/dma-api-howto.rst 7081da177e4SLinus Torvalds */ 7091da177e4SLinus Torvalds static dma_addr_t 7101da177e4SLinus Torvalds sba_map_single(struct device *dev, void *addr, size_t size, 7111da177e4SLinus Torvalds enum dma_data_direction direction) 7121da177e4SLinus Torvalds { 7131da177e4SLinus Torvalds struct ioc *ioc; 7141da177e4SLinus Torvalds unsigned long flags; 7151da177e4SLinus Torvalds dma_addr_t iovp; 7161da177e4SLinus Torvalds dma_addr_t offset; 717c1ebb940SHelge Deller __le64 *pdir_start; 7181da177e4SLinus Torvalds int pide; 7191da177e4SLinus Torvalds 7201da177e4SLinus Torvalds ioc = GET_IOC(dev); 72133f9e024SThomas Bogendoerfer if (!ioc) 722fb1b53f1SChristoph Hellwig return DMA_MAPPING_ERROR; 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds /* save offset bits */ 7251da177e4SLinus Torvalds offset = ((dma_addr_t) (long) addr) & ~IOVP_MASK; 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvalds /* round up to nearest IOVP_SIZE */ 7281da177e4SLinus Torvalds size = (size + offset + ~IOVP_MASK) & IOVP_MASK; 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds spin_lock_irqsave(&ioc->res_lock, flags); 7311da177e4SLinus Torvalds #ifdef ASSERT_PDIR_SANITY 7321da177e4SLinus Torvalds sba_check_pdir(ioc,"Check before sba_map_single()"); 7331da177e4SLinus Torvalds #endif 7341da177e4SLinus Torvalds 7351da177e4SLinus Torvalds #ifdef SBA_COLLECT_STATS 7361da177e4SLinus Torvalds ioc->msingle_calls++; 7371da177e4SLinus Torvalds ioc->msingle_pages += size >> IOVP_SHIFT; 7381da177e4SLinus Torvalds #endif 7397c8cda62SFUJITA Tomonori pide = sba_alloc_range(ioc, dev, size); 7401da177e4SLinus Torvalds iovp = (dma_addr_t) pide << IOVP_SHIFT; 7411da177e4SLinus Torvalds 7421da177e4SLinus Torvalds DBG_RUN("%s() 0x%p -> 0x%lx\n", 743a8043ecbSHarvey Harrison __func__, addr, (long) iovp | offset); 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds pdir_start = &(ioc->pdir_base[pide]); 7461da177e4SLinus Torvalds 7471da177e4SLinus Torvalds while (size > 0) { 7481da177e4SLinus Torvalds sba_io_pdir_entry(pdir_start, KERNEL_SPACE, (unsigned long) addr, 0); 7491da177e4SLinus Torvalds 7501da177e4SLinus Torvalds DBG_RUN(" pdir 0x%p %02x%02x%02x%02x%02x%02x%02x%02x\n", 7511da177e4SLinus Torvalds pdir_start, 7521da177e4SLinus Torvalds (u8) (((u8 *) pdir_start)[7]), 7531da177e4SLinus Torvalds (u8) (((u8 *) pdir_start)[6]), 7541da177e4SLinus Torvalds (u8) (((u8 *) pdir_start)[5]), 7551da177e4SLinus Torvalds (u8) (((u8 *) pdir_start)[4]), 7561da177e4SLinus Torvalds (u8) (((u8 *) pdir_start)[3]), 7571da177e4SLinus Torvalds (u8) (((u8 *) pdir_start)[2]), 7581da177e4SLinus Torvalds (u8) (((u8 *) pdir_start)[1]), 7591da177e4SLinus Torvalds (u8) (((u8 *) pdir_start)[0]) 7601da177e4SLinus Torvalds ); 7611da177e4SLinus Torvalds 7621da177e4SLinus Torvalds addr += IOVP_SIZE; 7631da177e4SLinus Torvalds size -= IOVP_SIZE; 7641da177e4SLinus Torvalds pdir_start++; 7651da177e4SLinus Torvalds } 76664908ad9SGrant Grundler 76764908ad9SGrant Grundler /* force FDC ops in io_pdir_entry() to be visible to IOMMU */ 7683847dab7SHelge Deller asm_io_sync(); 76964908ad9SGrant Grundler 7701da177e4SLinus Torvalds #ifdef ASSERT_PDIR_SANITY 7711da177e4SLinus Torvalds sba_check_pdir(ioc,"Check after sba_map_single()"); 7721da177e4SLinus Torvalds #endif 7731da177e4SLinus Torvalds spin_unlock_irqrestore(&ioc->res_lock, flags); 77464908ad9SGrant Grundler 77564908ad9SGrant Grundler /* form complete address */ 7761da177e4SLinus Torvalds return SBA_IOVA(ioc, iovp, offset, DEFAULT_DMA_HINT_REG); 7771da177e4SLinus Torvalds } 7781da177e4SLinus Torvalds 7791da177e4SLinus Torvalds 78079387179SChristoph Hellwig static dma_addr_t 78179387179SChristoph Hellwig sba_map_page(struct device *dev, struct page *page, unsigned long offset, 78279387179SChristoph Hellwig size_t size, enum dma_data_direction direction, 78300085f1eSKrzysztof Kozlowski unsigned long attrs) 78479387179SChristoph Hellwig { 78579387179SChristoph Hellwig return sba_map_single(dev, page_address(page) + offset, size, 78679387179SChristoph Hellwig direction); 78779387179SChristoph Hellwig } 78879387179SChristoph Hellwig 78979387179SChristoph Hellwig 7901da177e4SLinus Torvalds /** 79179387179SChristoph Hellwig * sba_unmap_page - unmap one IOVA and free resources 7921da177e4SLinus Torvalds * @dev: instance of PCI owned by the driver that's asking. 7931da177e4SLinus Torvalds * @iova: IOVA of driver buffer previously mapped. 7941da177e4SLinus Torvalds * @size: number of bytes mapped in driver buffer. 7951da177e4SLinus Torvalds * @direction: R/W or both. 796226b8ab8SHelge Deller * @attrs: attributes 7971da177e4SLinus Torvalds * 798985098a0SMauro Carvalho Chehab * See Documentation/core-api/dma-api-howto.rst 7991da177e4SLinus Torvalds */ 8001da177e4SLinus Torvalds static void 80179387179SChristoph Hellwig sba_unmap_page(struct device *dev, dma_addr_t iova, size_t size, 80200085f1eSKrzysztof Kozlowski enum dma_data_direction direction, unsigned long attrs) 8031da177e4SLinus Torvalds { 8041da177e4SLinus Torvalds struct ioc *ioc; 8051da177e4SLinus Torvalds #if DELAYED_RESOURCE_CNT > 0 8061da177e4SLinus Torvalds struct sba_dma_pair *d; 8071da177e4SLinus Torvalds #endif 8081da177e4SLinus Torvalds unsigned long flags; 8091da177e4SLinus Torvalds dma_addr_t offset; 8101da177e4SLinus Torvalds 811a8043ecbSHarvey Harrison DBG_RUN("%s() iovp 0x%lx/%x\n", __func__, (long) iova, size); 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds ioc = GET_IOC(dev); 81433f9e024SThomas Bogendoerfer if (!ioc) { 81533f9e024SThomas Bogendoerfer WARN_ON(!ioc); 81633f9e024SThomas Bogendoerfer return; 81733f9e024SThomas Bogendoerfer } 8181da177e4SLinus Torvalds offset = iova & ~IOVP_MASK; 8191da177e4SLinus Torvalds iova ^= offset; /* clear offset bits */ 8201da177e4SLinus Torvalds size += offset; 8213cb1d958SMilind Arun Choudhary size = ALIGN(size, IOVP_SIZE); 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds spin_lock_irqsave(&ioc->res_lock, flags); 8241da177e4SLinus Torvalds 8251da177e4SLinus Torvalds #ifdef SBA_COLLECT_STATS 8261da177e4SLinus Torvalds ioc->usingle_calls++; 8271da177e4SLinus Torvalds ioc->usingle_pages += size >> IOVP_SHIFT; 8281da177e4SLinus Torvalds #endif 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds sba_mark_invalid(ioc, iova, size); 8311da177e4SLinus Torvalds 8321da177e4SLinus Torvalds #if DELAYED_RESOURCE_CNT > 0 8331da177e4SLinus Torvalds /* Delaying when we re-use a IO Pdir entry reduces the number 8341da177e4SLinus Torvalds * of MMIO reads needed to flush writes to the PCOM register. 8351da177e4SLinus Torvalds */ 8361da177e4SLinus Torvalds d = &(ioc->saved[ioc->saved_cnt]); 8371da177e4SLinus Torvalds d->iova = iova; 8381da177e4SLinus Torvalds d->size = size; 8391da177e4SLinus Torvalds if (++(ioc->saved_cnt) >= DELAYED_RESOURCE_CNT) { 8401da177e4SLinus Torvalds int cnt = ioc->saved_cnt; 8411da177e4SLinus Torvalds while (cnt--) { 8421da177e4SLinus Torvalds sba_free_range(ioc, d->iova, d->size); 8431da177e4SLinus Torvalds d--; 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds ioc->saved_cnt = 0; 84664908ad9SGrant Grundler 8471da177e4SLinus Torvalds READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */ 8481da177e4SLinus Torvalds } 8491da177e4SLinus Torvalds #else /* DELAYED_RESOURCE_CNT == 0 */ 8501da177e4SLinus Torvalds sba_free_range(ioc, iova, size); 85164908ad9SGrant Grundler 85264908ad9SGrant Grundler /* If fdc's were issued, force fdc's to be visible now */ 8533847dab7SHelge Deller asm_io_sync(); 85464908ad9SGrant Grundler 8551da177e4SLinus Torvalds READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */ 8561da177e4SLinus Torvalds #endif /* DELAYED_RESOURCE_CNT == 0 */ 85764908ad9SGrant Grundler 8581da177e4SLinus Torvalds spin_unlock_irqrestore(&ioc->res_lock, flags); 8591da177e4SLinus Torvalds 8601da177e4SLinus Torvalds /* XXX REVISIT for 2.5 Linux - need syncdma for zero-copy support. 8611da177e4SLinus Torvalds ** For Astro based systems this isn't a big deal WRT performance. 8621da177e4SLinus Torvalds ** As long as 2.4 kernels copyin/copyout data from/to userspace, 8631da177e4SLinus Torvalds ** we don't need the syncdma. The issue here is I/O MMU cachelines 8641da177e4SLinus Torvalds ** are *not* coherent in all cases. May be hwrev dependent. 8651da177e4SLinus Torvalds ** Need to investigate more. 8661da177e4SLinus Torvalds asm volatile("syncdma"); 8671da177e4SLinus Torvalds */ 8681da177e4SLinus Torvalds } 8691da177e4SLinus Torvalds 8701da177e4SLinus Torvalds 8711da177e4SLinus Torvalds /** 87279387179SChristoph Hellwig * sba_alloc - allocate/map shared mem for DMA 8731da177e4SLinus Torvalds * @hwdev: instance of PCI owned by the driver that's asking. 8741da177e4SLinus Torvalds * @size: number of bytes mapped in driver buffer. 8751da177e4SLinus Torvalds * @dma_handle: IOVA of new buffer. 876226b8ab8SHelge Deller * @gfp: allocation flags 877226b8ab8SHelge Deller * @attrs: attributes 8781da177e4SLinus Torvalds * 879985098a0SMauro Carvalho Chehab * See Documentation/core-api/dma-api-howto.rst 8801da177e4SLinus Torvalds */ 88179387179SChristoph Hellwig static void *sba_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle, 88200085f1eSKrzysztof Kozlowski gfp_t gfp, unsigned long attrs) 8831da177e4SLinus Torvalds { 8841da177e4SLinus Torvalds void *ret; 8851da177e4SLinus Torvalds 8861da177e4SLinus Torvalds if (!hwdev) { 8871da177e4SLinus Torvalds /* only support PCI */ 8881da177e4SLinus Torvalds *dma_handle = 0; 889c2c4798eSMatthew Wilcox return NULL; 8901da177e4SLinus Torvalds } 8911da177e4SLinus Torvalds 8921da177e4SLinus Torvalds ret = (void *) __get_free_pages(gfp, get_order(size)); 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds if (ret) { 8951da177e4SLinus Torvalds memset(ret, 0, size); 8961da177e4SLinus Torvalds *dma_handle = sba_map_single(hwdev, ret, size, 0); 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds 8991da177e4SLinus Torvalds return ret; 9001da177e4SLinus Torvalds } 9011da177e4SLinus Torvalds 9021da177e4SLinus Torvalds 9031da177e4SLinus Torvalds /** 90479387179SChristoph Hellwig * sba_free - free/unmap shared mem for DMA 9051da177e4SLinus Torvalds * @hwdev: instance of PCI owned by the driver that's asking. 9061da177e4SLinus Torvalds * @size: number of bytes mapped in driver buffer. 9071da177e4SLinus Torvalds * @vaddr: virtual address IOVA of "consistent" buffer. 908226b8ab8SHelge Deller * @dma_handle: IO virtual address of "consistent" buffer. 909226b8ab8SHelge Deller * @attrs: attributes 9101da177e4SLinus Torvalds * 911985098a0SMauro Carvalho Chehab * See Documentation/core-api/dma-api-howto.rst 9121da177e4SLinus Torvalds */ 9131da177e4SLinus Torvalds static void 91479387179SChristoph Hellwig sba_free(struct device *hwdev, size_t size, void *vaddr, 91500085f1eSKrzysztof Kozlowski dma_addr_t dma_handle, unsigned long attrs) 9161da177e4SLinus Torvalds { 91700085f1eSKrzysztof Kozlowski sba_unmap_page(hwdev, dma_handle, size, 0, 0); 9181da177e4SLinus Torvalds free_pages((unsigned long) vaddr, get_order(size)); 9191da177e4SLinus Torvalds } 9201da177e4SLinus Torvalds 9211da177e4SLinus Torvalds 9221da177e4SLinus Torvalds /* 9231da177e4SLinus Torvalds ** Since 0 is a valid pdir_base index value, can't use that 9241da177e4SLinus Torvalds ** to determine if a value is valid or not. Use a flag to indicate 9251da177e4SLinus Torvalds ** the SG list entry contains a valid pdir index. 9261da177e4SLinus Torvalds */ 9271da177e4SLinus Torvalds #define PIDE_FLAG 0x80000000UL 9281da177e4SLinus Torvalds 9291da177e4SLinus Torvalds #ifdef SBA_COLLECT_STATS 9301da177e4SLinus Torvalds #define IOMMU_MAP_STATS 9311da177e4SLinus Torvalds #endif 9321da177e4SLinus Torvalds #include "iommu-helpers.h" 9331da177e4SLinus Torvalds 9341da177e4SLinus Torvalds #ifdef DEBUG_LARGE_SG_ENTRIES 9351da177e4SLinus Torvalds int dump_run_sg = 0; 9361da177e4SLinus Torvalds #endif 9371da177e4SLinus Torvalds 9381da177e4SLinus Torvalds 9391da177e4SLinus Torvalds /** 9401da177e4SLinus Torvalds * sba_map_sg - map Scatter/Gather list 9411da177e4SLinus Torvalds * @dev: instance of PCI owned by the driver that's asking. 9421da177e4SLinus Torvalds * @sglist: array of buffer/length pairs 9431da177e4SLinus Torvalds * @nents: number of entries in list 9441da177e4SLinus Torvalds * @direction: R/W or both. 945226b8ab8SHelge Deller * @attrs: attributes 9461da177e4SLinus Torvalds * 947985098a0SMauro Carvalho Chehab * See Documentation/core-api/dma-api-howto.rst 9481da177e4SLinus Torvalds */ 9491da177e4SLinus Torvalds static int 9501da177e4SLinus Torvalds sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents, 95100085f1eSKrzysztof Kozlowski enum dma_data_direction direction, unsigned long attrs) 9521da177e4SLinus Torvalds { 9531da177e4SLinus Torvalds struct ioc *ioc; 954226b8ab8SHelge Deller int filled = 0; 9551da177e4SLinus Torvalds unsigned long flags; 9561da177e4SLinus Torvalds 957a8043ecbSHarvey Harrison DBG_RUN_SG("%s() START %d entries\n", __func__, nents); 9581da177e4SLinus Torvalds 9591da177e4SLinus Torvalds ioc = GET_IOC(dev); 96033f9e024SThomas Bogendoerfer if (!ioc) 9619a22f2f3SMartin Oliveira return -EINVAL; 9621da177e4SLinus Torvalds 9631da177e4SLinus Torvalds /* Fast path single entry scatterlists. */ 9641da177e4SLinus Torvalds if (nents == 1) { 9658bf8a1d1SMatthew Wilcox sg_dma_address(sglist) = sba_map_single(dev, sg_virt(sglist), 9661da177e4SLinus Torvalds sglist->length, direction); 9671da177e4SLinus Torvalds sg_dma_len(sglist) = sglist->length; 9681da177e4SLinus Torvalds return 1; 9691da177e4SLinus Torvalds } 9701da177e4SLinus Torvalds 9711da177e4SLinus Torvalds spin_lock_irqsave(&ioc->res_lock, flags); 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds #ifdef ASSERT_PDIR_SANITY 9741da177e4SLinus Torvalds if (sba_check_pdir(ioc,"Check before sba_map_sg()")) 9751da177e4SLinus Torvalds { 9761da177e4SLinus Torvalds sba_dump_sg(ioc, sglist, nents); 9771da177e4SLinus Torvalds panic("Check before sba_map_sg()"); 9781da177e4SLinus Torvalds } 9791da177e4SLinus Torvalds #endif 9801da177e4SLinus Torvalds 9811da177e4SLinus Torvalds #ifdef SBA_COLLECT_STATS 9821da177e4SLinus Torvalds ioc->msg_calls++; 9831da177e4SLinus Torvalds #endif 9841da177e4SLinus Torvalds 9851da177e4SLinus Torvalds /* 9861da177e4SLinus Torvalds ** First coalesce the chunks and allocate I/O pdir space 9871da177e4SLinus Torvalds ** 9881da177e4SLinus Torvalds ** If this is one DMA stream, we can properly map using the 9891da177e4SLinus Torvalds ** correct virtual address associated with each DMA page. 9901da177e4SLinus Torvalds ** w/o this association, we wouldn't have coherent DMA! 9911da177e4SLinus Torvalds ** Access to the virtual address is what forces a two pass algorithm. 9921da177e4SLinus Torvalds */ 993226b8ab8SHelge Deller iommu_coalesce_chunks(ioc, dev, sglist, nents, sba_alloc_range); 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds /* 9961da177e4SLinus Torvalds ** Program the I/O Pdir 9971da177e4SLinus Torvalds ** 9981da177e4SLinus Torvalds ** map the virtual addresses to the I/O Pdir 9991da177e4SLinus Torvalds ** o dma_address will contain the pdir index 10001da177e4SLinus Torvalds ** o dma_len will contain the number of bytes to map 10011da177e4SLinus Torvalds ** o address contains the virtual address. 10021da177e4SLinus Torvalds */ 10031da177e4SLinus Torvalds filled = iommu_fill_pdir(ioc, sglist, nents, 0, sba_io_pdir_entry); 10041da177e4SLinus Torvalds 100564908ad9SGrant Grundler /* force FDC ops in io_pdir_entry() to be visible to IOMMU */ 10063847dab7SHelge Deller asm_io_sync(); 100764908ad9SGrant Grundler 10081da177e4SLinus Torvalds #ifdef ASSERT_PDIR_SANITY 10091da177e4SLinus Torvalds if (sba_check_pdir(ioc,"Check after sba_map_sg()")) 10101da177e4SLinus Torvalds { 10111da177e4SLinus Torvalds sba_dump_sg(ioc, sglist, nents); 10121da177e4SLinus Torvalds panic("Check after sba_map_sg()\n"); 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds #endif 10151da177e4SLinus Torvalds 10161da177e4SLinus Torvalds spin_unlock_irqrestore(&ioc->res_lock, flags); 10171da177e4SLinus Torvalds 1018a8043ecbSHarvey Harrison DBG_RUN_SG("%s() DONE %d mappings\n", __func__, filled); 10191da177e4SLinus Torvalds 10201da177e4SLinus Torvalds return filled; 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds 10231da177e4SLinus Torvalds 10241da177e4SLinus Torvalds /** 10251da177e4SLinus Torvalds * sba_unmap_sg - unmap Scatter/Gather list 10261da177e4SLinus Torvalds * @dev: instance of PCI owned by the driver that's asking. 10271da177e4SLinus Torvalds * @sglist: array of buffer/length pairs 10281da177e4SLinus Torvalds * @nents: number of entries in list 10291da177e4SLinus Torvalds * @direction: R/W or both. 1030226b8ab8SHelge Deller * @attrs: attributes 10311da177e4SLinus Torvalds * 1032985098a0SMauro Carvalho Chehab * See Documentation/core-api/dma-api-howto.rst 10331da177e4SLinus Torvalds */ 10341da177e4SLinus Torvalds static void 10351da177e4SLinus Torvalds sba_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents, 103600085f1eSKrzysztof Kozlowski enum dma_data_direction direction, unsigned long attrs) 10371da177e4SLinus Torvalds { 10381da177e4SLinus Torvalds struct ioc *ioc; 10391da177e4SLinus Torvalds #ifdef ASSERT_PDIR_SANITY 10401da177e4SLinus Torvalds unsigned long flags; 10411da177e4SLinus Torvalds #endif 10421da177e4SLinus Torvalds 10431da177e4SLinus Torvalds DBG_RUN_SG("%s() START %d entries, %p,%x\n", 10448bf8a1d1SMatthew Wilcox __func__, nents, sg_virt(sglist), sglist->length); 10451da177e4SLinus Torvalds 10461da177e4SLinus Torvalds ioc = GET_IOC(dev); 104733f9e024SThomas Bogendoerfer if (!ioc) { 104833f9e024SThomas Bogendoerfer WARN_ON(!ioc); 104933f9e024SThomas Bogendoerfer return; 105033f9e024SThomas Bogendoerfer } 10511da177e4SLinus Torvalds 10521da177e4SLinus Torvalds #ifdef SBA_COLLECT_STATS 10531da177e4SLinus Torvalds ioc->usg_calls++; 10541da177e4SLinus Torvalds #endif 10551da177e4SLinus Torvalds 10561da177e4SLinus Torvalds #ifdef ASSERT_PDIR_SANITY 10571da177e4SLinus Torvalds spin_lock_irqsave(&ioc->res_lock, flags); 10581da177e4SLinus Torvalds sba_check_pdir(ioc,"Check before sba_unmap_sg()"); 10591da177e4SLinus Torvalds spin_unlock_irqrestore(&ioc->res_lock, flags); 10601da177e4SLinus Torvalds #endif 10611da177e4SLinus Torvalds 1062b7d6f44aSJohn David Anglin while (nents && sg_dma_len(sglist)) { 10631da177e4SLinus Torvalds 106479387179SChristoph Hellwig sba_unmap_page(dev, sg_dma_address(sglist), sg_dma_len(sglist), 106500085f1eSKrzysztof Kozlowski direction, 0); 10661da177e4SLinus Torvalds #ifdef SBA_COLLECT_STATS 10671da177e4SLinus Torvalds ioc->usg_pages += ((sg_dma_address(sglist) & ~IOVP_MASK) + sg_dma_len(sglist) + IOVP_SIZE - 1) >> PAGE_SHIFT; 10681da177e4SLinus Torvalds ioc->usingle_calls--; /* kluge since call is unmap_sg() */ 10691da177e4SLinus Torvalds #endif 10701da177e4SLinus Torvalds ++sglist; 1071b7d6f44aSJohn David Anglin nents--; 10721da177e4SLinus Torvalds } 10731da177e4SLinus Torvalds 1074a8043ecbSHarvey Harrison DBG_RUN_SG("%s() DONE (nents %d)\n", __func__, nents); 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds #ifdef ASSERT_PDIR_SANITY 10771da177e4SLinus Torvalds spin_lock_irqsave(&ioc->res_lock, flags); 10781da177e4SLinus Torvalds sba_check_pdir(ioc,"Check after sba_unmap_sg()"); 10791da177e4SLinus Torvalds spin_unlock_irqrestore(&ioc->res_lock, flags); 10801da177e4SLinus Torvalds #endif 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds } 10831da177e4SLinus Torvalds 10845299709dSBart Van Assche static const struct dma_map_ops sba_ops = { 10851da177e4SLinus Torvalds .dma_supported = sba_dma_supported, 108679387179SChristoph Hellwig .alloc = sba_alloc, 108779387179SChristoph Hellwig .free = sba_free, 108879387179SChristoph Hellwig .map_page = sba_map_page, 108979387179SChristoph Hellwig .unmap_page = sba_unmap_page, 10901da177e4SLinus Torvalds .map_sg = sba_map_sg, 10911da177e4SLinus Torvalds .unmap_sg = sba_unmap_sg, 1092f9f3232aSChristoph Hellwig .get_sgtable = dma_common_get_sgtable, 1093*8a2f1187SSuren Baghdasaryan .alloc_pages_op = dma_common_alloc_pages, 1094efa70f2fSChristoph Hellwig .free_pages = dma_common_free_pages, 10951da177e4SLinus Torvalds }; 10961da177e4SLinus Torvalds 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds /************************************************************************** 10991da177e4SLinus Torvalds ** 11001da177e4SLinus Torvalds ** SBA PAT PDC support 11011da177e4SLinus Torvalds ** 11021da177e4SLinus Torvalds ** o call pdc_pat_cell_module() 11031da177e4SLinus Torvalds ** o store ranges in PCI "resource" structures 11041da177e4SLinus Torvalds ** 11051da177e4SLinus Torvalds **************************************************************************/ 11061da177e4SLinus Torvalds 11071da177e4SLinus Torvalds static void 11081da177e4SLinus Torvalds sba_get_pat_resources(struct sba_device *sba_dev) 11091da177e4SLinus Torvalds { 11101da177e4SLinus Torvalds #if 0 11111da177e4SLinus Torvalds /* 11121da177e4SLinus Torvalds ** TODO/REVISIT/FIXME: support for directed ranges requires calls to 11131da177e4SLinus Torvalds ** PAT PDC to program the SBA/LBA directed range registers...this 11141da177e4SLinus Torvalds ** burden may fall on the LBA code since it directly supports the 11151da177e4SLinus Torvalds ** PCI subsystem. It's not clear yet. - ggg 11161da177e4SLinus Torvalds */ 11171da177e4SLinus Torvalds PAT_MOD(mod)->mod_info.mod_pages = PAT_GET_MOD_PAGES(temp); 11181da177e4SLinus Torvalds FIXME : ??? 11191da177e4SLinus Torvalds PAT_MOD(mod)->mod_info.dvi = PAT_GET_DVI(temp); 11201da177e4SLinus Torvalds Tells where the dvi bits are located in the address. 11211da177e4SLinus Torvalds PAT_MOD(mod)->mod_info.ioc = PAT_GET_IOC(temp); 11221da177e4SLinus Torvalds FIXME : ??? 11231da177e4SLinus Torvalds #endif 11241da177e4SLinus Torvalds } 11251da177e4SLinus Torvalds 11261da177e4SLinus Torvalds 11271da177e4SLinus Torvalds /************************************************************** 11281da177e4SLinus Torvalds * 11291da177e4SLinus Torvalds * Initialization and claim 11301da177e4SLinus Torvalds * 11311da177e4SLinus Torvalds ***************************************************************/ 11321da177e4SLinus Torvalds #define PIRANHA_ADDR_MASK 0x00160000UL /* bit 17,18,20 */ 11331da177e4SLinus Torvalds #define PIRANHA_ADDR_VAL 0x00060000UL /* bit 17,18 on */ 11341da177e4SLinus Torvalds static void * 11351da177e4SLinus Torvalds sba_alloc_pdir(unsigned int pdir_size) 11361da177e4SLinus Torvalds { 11371da177e4SLinus Torvalds unsigned long pdir_base; 11381da177e4SLinus Torvalds unsigned long pdir_order = get_order(pdir_size); 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds pdir_base = __get_free_pages(GFP_KERNEL, pdir_order); 114164908ad9SGrant Grundler if (NULL == (void *) pdir_base) { 114264908ad9SGrant Grundler panic("%s() could not allocate I/O Page Table\n", 1143a8043ecbSHarvey Harrison __func__); 114464908ad9SGrant Grundler } 11451da177e4SLinus Torvalds 11461da177e4SLinus Torvalds /* If this is not PA8700 (PCX-W2) 11471da177e4SLinus Torvalds ** OR newer than ver 2.2 11481da177e4SLinus Torvalds ** OR in a system that doesn't need VINDEX bits from SBA, 11491da177e4SLinus Torvalds ** 11501da177e4SLinus Torvalds ** then we aren't exposed to the HW bug. 11511da177e4SLinus Torvalds */ 11521da177e4SLinus Torvalds if ( ((boot_cpu_data.pdc.cpuid >> 5) & 0x7f) != 0x13 11531da177e4SLinus Torvalds || (boot_cpu_data.pdc.versions > 0x202) 11541da177e4SLinus Torvalds || (boot_cpu_data.pdc.capabilities & 0x08L) ) 11551da177e4SLinus Torvalds return (void *) pdir_base; 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds /* 11581da177e4SLinus Torvalds * PA8700 (PCX-W2, aka piranha) silent data corruption fix 11591da177e4SLinus Torvalds * 11601da177e4SLinus Torvalds * An interaction between PA8700 CPU (Ver 2.2 or older) and 11611da177e4SLinus Torvalds * Ike/Astro can cause silent data corruption. This is only 11621da177e4SLinus Torvalds * a problem if the I/O PDIR is located in memory such that 11631da177e4SLinus Torvalds * (little-endian) bits 17 and 18 are on and bit 20 is off. 11641da177e4SLinus Torvalds * 11651da177e4SLinus Torvalds * Since the max IO Pdir size is 2MB, by cleverly allocating the 11661da177e4SLinus Torvalds * right physical address, we can either avoid (IOPDIR <= 1MB) 11671da177e4SLinus Torvalds * or minimize (2MB IO Pdir) the problem if we restrict the 11681da177e4SLinus Torvalds * IO Pdir to a maximum size of 2MB-128K (1902K). 11691da177e4SLinus Torvalds * 11701da177e4SLinus Torvalds * Because we always allocate 2^N sized IO pdirs, either of the 11711da177e4SLinus Torvalds * "bad" regions will be the last 128K if at all. That's easy 11721da177e4SLinus Torvalds * to test for. 11731da177e4SLinus Torvalds * 11741da177e4SLinus Torvalds */ 11751da177e4SLinus Torvalds if (pdir_order <= (19-12)) { 11761da177e4SLinus Torvalds if (((virt_to_phys(pdir_base)+pdir_size-1) & PIRANHA_ADDR_MASK) == PIRANHA_ADDR_VAL) { 11771da177e4SLinus Torvalds /* allocate a new one on 512k alignment */ 11781da177e4SLinus Torvalds unsigned long new_pdir = __get_free_pages(GFP_KERNEL, (19-12)); 11791da177e4SLinus Torvalds /* release original */ 11801da177e4SLinus Torvalds free_pages(pdir_base, pdir_order); 11811da177e4SLinus Torvalds 11821da177e4SLinus Torvalds pdir_base = new_pdir; 11831da177e4SLinus Torvalds 11841da177e4SLinus Torvalds /* release excess */ 11851da177e4SLinus Torvalds while (pdir_order < (19-12)) { 11861da177e4SLinus Torvalds new_pdir += pdir_size; 11871da177e4SLinus Torvalds free_pages(new_pdir, pdir_order); 11881da177e4SLinus Torvalds pdir_order +=1; 11891da177e4SLinus Torvalds pdir_size <<=1; 11901da177e4SLinus Torvalds } 11911da177e4SLinus Torvalds } 11921da177e4SLinus Torvalds } else { 11931da177e4SLinus Torvalds /* 11941da177e4SLinus Torvalds ** 1MB or 2MB Pdir 11951da177e4SLinus Torvalds ** Needs to be aligned on an "odd" 1MB boundary. 11961da177e4SLinus Torvalds */ 11971da177e4SLinus Torvalds unsigned long new_pdir = __get_free_pages(GFP_KERNEL, pdir_order+1); /* 2 or 4MB */ 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds /* release original */ 12001da177e4SLinus Torvalds free_pages( pdir_base, pdir_order); 12011da177e4SLinus Torvalds 12021da177e4SLinus Torvalds /* release first 1MB */ 12031da177e4SLinus Torvalds free_pages(new_pdir, 20-12); 12041da177e4SLinus Torvalds 12051da177e4SLinus Torvalds pdir_base = new_pdir + 1024*1024; 12061da177e4SLinus Torvalds 12071da177e4SLinus Torvalds if (pdir_order > (20-12)) { 12081da177e4SLinus Torvalds /* 12091da177e4SLinus Torvalds ** 2MB Pdir. 12101da177e4SLinus Torvalds ** 12111da177e4SLinus Torvalds ** Flag tells init_bitmap() to mark bad 128k as used 12121da177e4SLinus Torvalds ** and to reduce the size by 128k. 12131da177e4SLinus Torvalds */ 12141da177e4SLinus Torvalds piranha_bad_128k = 1; 12151da177e4SLinus Torvalds 12161da177e4SLinus Torvalds new_pdir += 3*1024*1024; 12171da177e4SLinus Torvalds /* release last 1MB */ 12181da177e4SLinus Torvalds free_pages(new_pdir, 20-12); 12191da177e4SLinus Torvalds 12201da177e4SLinus Torvalds /* release unusable 128KB */ 12211da177e4SLinus Torvalds free_pages(new_pdir - 128*1024 , 17-12); 12221da177e4SLinus Torvalds 12231da177e4SLinus Torvalds pdir_size -= 128*1024; 12241da177e4SLinus Torvalds } 12251da177e4SLinus Torvalds } 12261da177e4SLinus Torvalds 12271da177e4SLinus Torvalds memset((void *) pdir_base, 0, pdir_size); 12281da177e4SLinus Torvalds return (void *) pdir_base; 12291da177e4SLinus Torvalds } 12301da177e4SLinus Torvalds 1231bfe4f4f8SJames Bottomley struct ibase_data_struct { 1232bfe4f4f8SJames Bottomley struct ioc *ioc; 1233bfe4f4f8SJames Bottomley int ioc_num; 1234bfe4f4f8SJames Bottomley }; 1235bfe4f4f8SJames Bottomley 1236bfe4f4f8SJames Bottomley static int setup_ibase_imask_callback(struct device *dev, void *data) 123756583747SMatthew Wilcox { 1238bfe4f4f8SJames Bottomley struct parisc_device *lba = to_parisc_device(dev); 1239bfe4f4f8SJames Bottomley struct ibase_data_struct *ibd = data; 1240bfe4f4f8SJames Bottomley int rope_num = (lba->hpa.start >> 13) & 0xf; 1241bfe4f4f8SJames Bottomley if (rope_num >> 3 == ibd->ioc_num) 1242bfe4f4f8SJames Bottomley lba_set_iregs(lba, ibd->ioc->ibase, ibd->ioc->imask); 1243bfe4f4f8SJames Bottomley return 0; 124456583747SMatthew Wilcox } 124556583747SMatthew Wilcox 12461da177e4SLinus Torvalds /* setup Mercury or Elroy IBASE/IMASK registers. */ 124756583747SMatthew Wilcox static void 124856583747SMatthew Wilcox setup_ibase_imask(struct parisc_device *sba, struct ioc *ioc, int ioc_num) 12491da177e4SLinus Torvalds { 1250bfe4f4f8SJames Bottomley struct ibase_data_struct ibase_data = { 1251bfe4f4f8SJames Bottomley .ioc = ioc, 1252bfe4f4f8SJames Bottomley .ioc_num = ioc_num, 1253bfe4f4f8SJames Bottomley }; 12541da177e4SLinus Torvalds 1255bfe4f4f8SJames Bottomley device_for_each_child(&sba->dev, &ibase_data, 1256bfe4f4f8SJames Bottomley setup_ibase_imask_callback); 1257bfe4f4f8SJames Bottomley } 1258bfe4f4f8SJames Bottomley 1259bfe4f4f8SJames Bottomley #ifdef SBA_AGP_SUPPORT 1260bfe4f4f8SJames Bottomley static int 1261bfe4f4f8SJames Bottomley sba_ioc_find_quicksilver(struct device *dev, void *data) 1262bfe4f4f8SJames Bottomley { 1263bfe4f4f8SJames Bottomley int *agp_found = data; 12641da177e4SLinus Torvalds struct parisc_device *lba = to_parisc_device(dev); 1265bfe4f4f8SJames Bottomley 1266bfe4f4f8SJames Bottomley if (IS_QUICKSILVER(lba)) 1267bfe4f4f8SJames Bottomley *agp_found = 1; 1268bfe4f4f8SJames Bottomley return 0; 12691da177e4SLinus Torvalds } 1270bfe4f4f8SJames Bottomley #endif 12711da177e4SLinus Torvalds 12721da177e4SLinus Torvalds static void 12731da177e4SLinus Torvalds sba_ioc_init_pluto(struct parisc_device *sba, struct ioc *ioc, int ioc_num) 12741da177e4SLinus Torvalds { 12751da177e4SLinus Torvalds u32 iova_space_mask; 12761da177e4SLinus Torvalds u32 iova_space_size; 12771da177e4SLinus Torvalds int iov_order, tcnfg; 127864908ad9SGrant Grundler #ifdef SBA_AGP_SUPPORT 12791da177e4SLinus Torvalds int agp_found = 0; 12801da177e4SLinus Torvalds #endif 12811da177e4SLinus Torvalds /* 12821da177e4SLinus Torvalds ** Firmware programs the base and size of a "safe IOVA space" 12831da177e4SLinus Torvalds ** (one that doesn't overlap memory or LMMIO space) in the 12841da177e4SLinus Torvalds ** IBASE and IMASK registers. 12851da177e4SLinus Torvalds */ 12865b24993cSSven Schnelle ioc->ibase = READ_REG(ioc->ioc_hpa + IOC_IBASE) & ~0x1fffffULL; 12871da177e4SLinus Torvalds iova_space_size = ~(READ_REG(ioc->ioc_hpa + IOC_IMASK) & 0xFFFFFFFFUL) + 1; 12881da177e4SLinus Torvalds 12891da177e4SLinus Torvalds if ((ioc->ibase < 0xfed00000UL) && ((ioc->ibase + iova_space_size) > 0xfee00000UL)) { 12901da177e4SLinus Torvalds printk("WARNING: IOV space overlaps local config and interrupt message, truncating\n"); 12911da177e4SLinus Torvalds iova_space_size /= 2; 12921da177e4SLinus Torvalds } 12931da177e4SLinus Torvalds 12941da177e4SLinus Torvalds /* 12951da177e4SLinus Torvalds ** iov_order is always based on a 1GB IOVA space since we want to 12961da177e4SLinus Torvalds ** turn on the other half for AGP GART. 12971da177e4SLinus Torvalds */ 12981da177e4SLinus Torvalds iov_order = get_order(iova_space_size >> (IOVP_SHIFT - PAGE_SHIFT)); 12991da177e4SLinus Torvalds ioc->pdir_size = (iova_space_size / IOVP_SIZE) * sizeof(u64); 13001da177e4SLinus Torvalds 130140d78de1SGrant Grundler DBG_INIT("%s() hpa 0x%p IOV %dMB (%d bits)\n", 1302a8043ecbSHarvey Harrison __func__, ioc->ioc_hpa, iova_space_size >> 20, 13031da177e4SLinus Torvalds iov_order + PAGE_SHIFT); 13041da177e4SLinus Torvalds 13051da177e4SLinus Torvalds ioc->pdir_base = (void *) __get_free_pages(GFP_KERNEL, 13061da177e4SLinus Torvalds get_order(ioc->pdir_size)); 13071da177e4SLinus Torvalds if (!ioc->pdir_base) 13081da177e4SLinus Torvalds panic("Couldn't allocate I/O Page Table\n"); 13091da177e4SLinus Torvalds 13101da177e4SLinus Torvalds memset(ioc->pdir_base, 0, ioc->pdir_size); 13111da177e4SLinus Torvalds 13121da177e4SLinus Torvalds DBG_INIT("%s() pdir %p size %x\n", 1313a8043ecbSHarvey Harrison __func__, ioc->pdir_base, ioc->pdir_size); 13141da177e4SLinus Torvalds 131564908ad9SGrant Grundler #ifdef SBA_HINT_SUPPORT 13161da177e4SLinus Torvalds ioc->hint_shift_pdir = iov_order + PAGE_SHIFT; 13171da177e4SLinus Torvalds ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT)); 13181da177e4SLinus Torvalds 13191da177e4SLinus Torvalds DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n", 13201da177e4SLinus Torvalds ioc->hint_shift_pdir, ioc->hint_mask_pdir); 13211da177e4SLinus Torvalds #endif 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds WARN_ON((((unsigned long) ioc->pdir_base) & PAGE_MASK) != (unsigned long) ioc->pdir_base); 13241da177e4SLinus Torvalds WRITE_REG(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE); 13251da177e4SLinus Torvalds 13261da177e4SLinus Torvalds /* build IMASK for IOC and Elroy */ 13271da177e4SLinus Torvalds iova_space_mask = 0xffffffff; 13281da177e4SLinus Torvalds iova_space_mask <<= (iov_order + PAGE_SHIFT); 13291da177e4SLinus Torvalds ioc->imask = iova_space_mask; 13301da177e4SLinus Torvalds #ifdef ZX1_SUPPORT 13311da177e4SLinus Torvalds ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1); 13321da177e4SLinus Torvalds #endif 13331da177e4SLinus Torvalds sba_dump_tlb(ioc->ioc_hpa); 13341da177e4SLinus Torvalds 13351da177e4SLinus Torvalds setup_ibase_imask(sba, ioc, ioc_num); 13361da177e4SLinus Torvalds 13371da177e4SLinus Torvalds WRITE_REG(ioc->imask, ioc->ioc_hpa + IOC_IMASK); 13381da177e4SLinus Torvalds 133964908ad9SGrant Grundler #ifdef CONFIG_64BIT 13401da177e4SLinus Torvalds /* 13411da177e4SLinus Torvalds ** Setting the upper bits makes checking for bypass addresses 13421da177e4SLinus Torvalds ** a little faster later on. 13431da177e4SLinus Torvalds */ 13441da177e4SLinus Torvalds ioc->imask |= 0xFFFFFFFF00000000UL; 13451da177e4SLinus Torvalds #endif 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds /* Set I/O PDIR Page size to system page size */ 13481da177e4SLinus Torvalds switch (PAGE_SHIFT) { 13491da177e4SLinus Torvalds case 12: tcnfg = 0; break; /* 4K */ 13501da177e4SLinus Torvalds case 13: tcnfg = 1; break; /* 8K */ 13511da177e4SLinus Torvalds case 14: tcnfg = 2; break; /* 16K */ 13521da177e4SLinus Torvalds case 16: tcnfg = 3; break; /* 64K */ 13531da177e4SLinus Torvalds default: 13541da177e4SLinus Torvalds panic(__FILE__ "Unsupported system page size %d", 13551da177e4SLinus Torvalds 1 << PAGE_SHIFT); 13561da177e4SLinus Torvalds break; 13571da177e4SLinus Torvalds } 13581da177e4SLinus Torvalds WRITE_REG(tcnfg, ioc->ioc_hpa + IOC_TCNFG); 13591da177e4SLinus Torvalds 13601da177e4SLinus Torvalds /* 13611da177e4SLinus Torvalds ** Program the IOC's ibase and enable IOVA translation 13621da177e4SLinus Torvalds ** Bit zero == enable bit. 13631da177e4SLinus Torvalds */ 13641da177e4SLinus Torvalds WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa + IOC_IBASE); 13651da177e4SLinus Torvalds 13661da177e4SLinus Torvalds /* 13671da177e4SLinus Torvalds ** Clear I/O TLB of any possible entries. 13681da177e4SLinus Torvalds ** (Yes. This is a bit paranoid...but so what) 13691da177e4SLinus Torvalds */ 13701da177e4SLinus Torvalds WRITE_REG(ioc->ibase | 31, ioc->ioc_hpa + IOC_PCOM); 13711da177e4SLinus Torvalds 137264908ad9SGrant Grundler #ifdef SBA_AGP_SUPPORT 137308a64368SKyle McMartin 13741da177e4SLinus Torvalds /* 13751da177e4SLinus Torvalds ** If an AGP device is present, only use half of the IOV space 13761da177e4SLinus Torvalds ** for PCI DMA. Unfortunately we can't know ahead of time 13771da177e4SLinus Torvalds ** whether GART support will actually be used, for now we 13781da177e4SLinus Torvalds ** can just key on any AGP device found in the system. 13791da177e4SLinus Torvalds ** We program the next pdir index after we stop w/ a key for 13801da177e4SLinus Torvalds ** the GART code to handshake on. 13811da177e4SLinus Torvalds */ 1382bfe4f4f8SJames Bottomley device_for_each_child(&sba->dev, &agp_found, sba_ioc_find_quicksilver); 13831da177e4SLinus Torvalds 138408a64368SKyle McMartin if (agp_found && sba_reserve_agpgart) { 138508a64368SKyle McMartin printk(KERN_INFO "%s: reserving %dMb of IOVA space for agpgart\n", 1386a8043ecbSHarvey Harrison __func__, (iova_space_size/2) >> 20); 13871da177e4SLinus Torvalds ioc->pdir_size /= 2; 138808a64368SKyle McMartin ioc->pdir_base[PDIR_INDEX(iova_space_size/2)] = SBA_AGPGART_COOKIE; 13891da177e4SLinus Torvalds } 139008a64368SKyle McMartin #endif /*SBA_AGP_SUPPORT*/ 13911da177e4SLinus Torvalds } 13921da177e4SLinus Torvalds 13931da177e4SLinus Torvalds static void 13941da177e4SLinus Torvalds sba_ioc_init(struct parisc_device *sba, struct ioc *ioc, int ioc_num) 13951da177e4SLinus Torvalds { 13961da177e4SLinus Torvalds u32 iova_space_size, iova_space_mask; 13976a45716aSHelge Deller unsigned int pdir_size, iov_order, tcnfg; 13981da177e4SLinus Torvalds 13991da177e4SLinus Torvalds /* 14001da177e4SLinus Torvalds ** Determine IOVA Space size from memory size. 14011da177e4SLinus Torvalds ** 14021da177e4SLinus Torvalds ** Ideally, PCI drivers would register the maximum number 14031da177e4SLinus Torvalds ** of DMA they can have outstanding for each device they 14041da177e4SLinus Torvalds ** own. Next best thing would be to guess how much DMA 14051da177e4SLinus Torvalds ** can be outstanding based on PCI Class/sub-class. Both 14061da177e4SLinus Torvalds ** methods still require some "extra" to support PCI 14071da177e4SLinus Torvalds ** Hot-Plug/Removal of PCI cards. (aka PCI OLARD). 14081da177e4SLinus Torvalds ** 14091da177e4SLinus Torvalds ** While we have 32-bits "IOVA" space, top two 2 bits are used 14101da177e4SLinus Torvalds ** for DMA hints - ergo only 30 bits max. 14111da177e4SLinus Torvalds */ 14121da177e4SLinus Torvalds 1413ca79b0c2SArun KS iova_space_size = (u32) (totalram_pages()/global_ioc_cnt); 14141da177e4SLinus Torvalds 14151da177e4SLinus Torvalds /* limit IOVA space size to 1MB-1GB */ 14161da177e4SLinus Torvalds if (iova_space_size < (1 << (20 - PAGE_SHIFT))) { 14171da177e4SLinus Torvalds iova_space_size = 1 << (20 - PAGE_SHIFT); 14181da177e4SLinus Torvalds } 14191da177e4SLinus Torvalds else if (iova_space_size > (1 << (30 - PAGE_SHIFT))) { 14201da177e4SLinus Torvalds iova_space_size = 1 << (30 - PAGE_SHIFT); 14211da177e4SLinus Torvalds } 14221da177e4SLinus Torvalds 14231da177e4SLinus Torvalds /* 14241da177e4SLinus Torvalds ** iova space must be log2() in size. 14251da177e4SLinus Torvalds ** thus, pdir/res_map will also be log2(). 14261da177e4SLinus Torvalds ** PIRANHA BUG: Exception is when IO Pdir is 2MB (gets reduced) 14271da177e4SLinus Torvalds */ 14281da177e4SLinus Torvalds iov_order = get_order(iova_space_size << PAGE_SHIFT); 14291da177e4SLinus Torvalds 14301da177e4SLinus Torvalds /* iova_space_size is now bytes, not pages */ 14311da177e4SLinus Torvalds iova_space_size = 1 << (iov_order + PAGE_SHIFT); 14321da177e4SLinus Torvalds 14331da177e4SLinus Torvalds ioc->pdir_size = pdir_size = (iova_space_size/IOVP_SIZE) * sizeof(u64); 14341da177e4SLinus Torvalds 1435c1ebb940SHelge Deller DBG_INIT("%s() hpa %px mem %ldMB IOV %dMB (%d bits)\n", 1436a8043ecbSHarvey Harrison __func__, 14371da177e4SLinus Torvalds ioc->ioc_hpa, 1438ca79b0c2SArun KS (unsigned long) totalram_pages() >> (20 - PAGE_SHIFT), 14391da177e4SLinus Torvalds iova_space_size>>20, 14401da177e4SLinus Torvalds iov_order + PAGE_SHIFT); 14411da177e4SLinus Torvalds 14421da177e4SLinus Torvalds ioc->pdir_base = sba_alloc_pdir(pdir_size); 14431da177e4SLinus Torvalds 14441da177e4SLinus Torvalds DBG_INIT("%s() pdir %p size %x\n", 1445a8043ecbSHarvey Harrison __func__, ioc->pdir_base, pdir_size); 14461da177e4SLinus Torvalds 144764908ad9SGrant Grundler #ifdef SBA_HINT_SUPPORT 14481da177e4SLinus Torvalds /* FIXME : DMA HINTs not used */ 14491da177e4SLinus Torvalds ioc->hint_shift_pdir = iov_order + PAGE_SHIFT; 14501da177e4SLinus Torvalds ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT)); 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n", 14531da177e4SLinus Torvalds ioc->hint_shift_pdir, ioc->hint_mask_pdir); 14541da177e4SLinus Torvalds #endif 14551da177e4SLinus Torvalds 14561da177e4SLinus Torvalds WRITE_REG64(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE); 14571da177e4SLinus Torvalds 14581da177e4SLinus Torvalds /* build IMASK for IOC and Elroy */ 14591da177e4SLinus Torvalds iova_space_mask = 0xffffffff; 14601da177e4SLinus Torvalds iova_space_mask <<= (iov_order + PAGE_SHIFT); 14611da177e4SLinus Torvalds 14621da177e4SLinus Torvalds /* 14631da177e4SLinus Torvalds ** On C3000 w/512MB mem, HP-UX 10.20 reports: 14641da177e4SLinus Torvalds ** ibase=0, imask=0xFE000000, size=0x2000000. 14651da177e4SLinus Torvalds */ 14661da177e4SLinus Torvalds ioc->ibase = 0; 14671da177e4SLinus Torvalds ioc->imask = iova_space_mask; /* save it */ 14681da177e4SLinus Torvalds #ifdef ZX1_SUPPORT 14691da177e4SLinus Torvalds ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1); 14701da177e4SLinus Torvalds #endif 14711da177e4SLinus Torvalds 1472c1ebb940SHelge Deller DBG_INIT("%s() IOV base %#lx mask %#0lx\n", 1473a8043ecbSHarvey Harrison __func__, ioc->ibase, ioc->imask); 14741da177e4SLinus Torvalds 14751da177e4SLinus Torvalds /* 14761da177e4SLinus Torvalds ** FIXME: Hint registers are programmed with default hint 14771da177e4SLinus Torvalds ** values during boot, so hints should be sane even if we 14781da177e4SLinus Torvalds ** can't reprogram them the way drivers want. 14791da177e4SLinus Torvalds */ 14801da177e4SLinus Torvalds 14811da177e4SLinus Torvalds setup_ibase_imask(sba, ioc, ioc_num); 14821da177e4SLinus Torvalds 14831da177e4SLinus Torvalds /* 14841da177e4SLinus Torvalds ** Program the IOC's ibase and enable IOVA translation 14851da177e4SLinus Torvalds */ 14861da177e4SLinus Torvalds WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa+IOC_IBASE); 14871da177e4SLinus Torvalds WRITE_REG(ioc->imask, ioc->ioc_hpa+IOC_IMASK); 14881da177e4SLinus Torvalds 14896a45716aSHelge Deller /* Set I/O PDIR Page size to system page size */ 14906a45716aSHelge Deller switch (PAGE_SHIFT) { 14916a45716aSHelge Deller case 12: tcnfg = 0; break; /* 4K */ 14926a45716aSHelge Deller case 13: tcnfg = 1; break; /* 8K */ 14936a45716aSHelge Deller case 14: tcnfg = 2; break; /* 16K */ 14946a45716aSHelge Deller case 16: tcnfg = 3; break; /* 64K */ 14956a45716aSHelge Deller default: 14966a45716aSHelge Deller panic(__FILE__ "Unsupported system page size %d", 14976a45716aSHelge Deller 1 << PAGE_SHIFT); 14986a45716aSHelge Deller break; 14996a45716aSHelge Deller } 15006a45716aSHelge Deller /* Set I/O PDIR Page size to PAGE_SIZE (4k/16k/...) */ 15016a45716aSHelge Deller WRITE_REG(tcnfg, ioc->ioc_hpa+IOC_TCNFG); 15021da177e4SLinus Torvalds 15031da177e4SLinus Torvalds /* 15041da177e4SLinus Torvalds ** Clear I/O TLB of any possible entries. 15051da177e4SLinus Torvalds ** (Yes. This is a bit paranoid...but so what) 15061da177e4SLinus Torvalds */ 15071da177e4SLinus Torvalds WRITE_REG(0 | 31, ioc->ioc_hpa+IOC_PCOM); 15081da177e4SLinus Torvalds 15091da177e4SLinus Torvalds ioc->ibase = 0; /* used by SBA_IOVA and related macros */ 15101da177e4SLinus Torvalds 1511a8043ecbSHarvey Harrison DBG_INIT("%s() DONE\n", __func__); 15121da177e4SLinus Torvalds } 15131da177e4SLinus Torvalds 15141da177e4SLinus Torvalds 15151da177e4SLinus Torvalds 15161da177e4SLinus Torvalds /************************************************************************** 15171da177e4SLinus Torvalds ** 15181da177e4SLinus Torvalds ** SBA initialization code (HW and SW) 15191da177e4SLinus Torvalds ** 15201da177e4SLinus Torvalds ** o identify SBA chip itself 15211da177e4SLinus Torvalds ** o initialize SBA chip modes (HardFail) 15221da177e4SLinus Torvalds ** o initialize SBA chip modes (HardFail) 15231da177e4SLinus Torvalds ** o FIXME: initialize DMA hints for reasonable defaults 15241da177e4SLinus Torvalds ** 15251da177e4SLinus Torvalds **************************************************************************/ 15261da177e4SLinus Torvalds 15275076c158SHelge Deller static void __iomem *ioc_remap(struct sba_device *sba_dev, unsigned int offset) 15281da177e4SLinus Torvalds { 15294bdc0d67SChristoph Hellwig return ioremap(sba_dev->dev->hpa.start + offset, SBA_FUNC_SIZE); 15301da177e4SLinus Torvalds } 15311da177e4SLinus Torvalds 15321da177e4SLinus Torvalds static void sba_hw_init(struct sba_device *sba_dev) 15331da177e4SLinus Torvalds { 15341da177e4SLinus Torvalds int i; 15351da177e4SLinus Torvalds int num_ioc; 15361da177e4SLinus Torvalds u64 ioc_ctl; 15371da177e4SLinus Torvalds 15381da177e4SLinus Torvalds if (!is_pdc_pat()) { 15391da177e4SLinus Torvalds /* Shutdown the USB controller on Astro-based workstations. 15401da177e4SLinus Torvalds ** Once we reprogram the IOMMU, the next DMA performed by 15411da177e4SLinus Torvalds ** USB will HPMC the box. USB is only enabled if a 15421da177e4SLinus Torvalds ** keyboard is present and found. 15431da177e4SLinus Torvalds ** 15441da177e4SLinus Torvalds ** With serial console, j6k v5.0 firmware says: 15451da177e4SLinus Torvalds ** mem_kbd hpa 0xfee003f8 sba 0x0 pad 0x0 cl_class 0x7 15461da177e4SLinus Torvalds ** 15471da177e4SLinus Torvalds ** FIXME: Using GFX+USB console at power up but direct 15481da177e4SLinus Torvalds ** linux to serial console is still broken. 15491da177e4SLinus Torvalds ** USB could generate DMA so we must reset USB. 15501da177e4SLinus Torvalds ** The proper sequence would be: 15511da177e4SLinus Torvalds ** o block console output 15521da177e4SLinus Torvalds ** o reset USB device 15531da177e4SLinus Torvalds ** o reprogram serial port 15541da177e4SLinus Torvalds ** o unblock console output 15551da177e4SLinus Torvalds */ 15561da177e4SLinus Torvalds if (PAGE0->mem_kbd.cl_class == CL_KEYBD) { 15571da177e4SLinus Torvalds pdc_io_reset_devices(); 15581da177e4SLinus Torvalds } 15591da177e4SLinus Torvalds 15601da177e4SLinus Torvalds } 15611da177e4SLinus Torvalds 15621da177e4SLinus Torvalds 15631da177e4SLinus Torvalds #if 0 15641da177e4SLinus Torvalds printk("sba_hw_init(): mem_boot 0x%x 0x%x 0x%x 0x%x\n", PAGE0->mem_boot.hpa, 15651da177e4SLinus Torvalds PAGE0->mem_boot.spa, PAGE0->mem_boot.pad, PAGE0->mem_boot.cl_class); 15661da177e4SLinus Torvalds 15671da177e4SLinus Torvalds /* 15681da177e4SLinus Torvalds ** Need to deal with DMA from LAN. 15691da177e4SLinus Torvalds ** Maybe use page zero boot device as a handle to talk 15701da177e4SLinus Torvalds ** to PDC about which device to shutdown. 15711da177e4SLinus Torvalds ** 15721da177e4SLinus Torvalds ** Netbooting, j6k v5.0 firmware says: 15731da177e4SLinus Torvalds ** mem_boot hpa 0xf4008000 sba 0x0 pad 0x0 cl_class 0x1002 15741da177e4SLinus Torvalds ** ARGH! invalid class. 15751da177e4SLinus Torvalds */ 15761da177e4SLinus Torvalds if ((PAGE0->mem_boot.cl_class != CL_RANDOM) 15771da177e4SLinus Torvalds && (PAGE0->mem_boot.cl_class != CL_SEQU)) { 15781da177e4SLinus Torvalds pdc_io_reset(); 15791da177e4SLinus Torvalds } 15801da177e4SLinus Torvalds #endif 15811da177e4SLinus Torvalds 15821b240f41SKyle McMartin if (!IS_PLUTO(sba_dev->dev)) { 15831da177e4SLinus Torvalds ioc_ctl = READ_REG(sba_dev->sba_hpa+IOC_CTRL); 1584c1ebb940SHelge Deller DBG_INIT("%s() hpa %px ioc_ctl 0x%Lx ->", 1585a8043ecbSHarvey Harrison __func__, sba_dev->sba_hpa, ioc_ctl); 15861da177e4SLinus Torvalds ioc_ctl &= ~(IOC_CTRL_RM | IOC_CTRL_NC | IOC_CTRL_CE); 15871da177e4SLinus Torvalds ioc_ctl |= IOC_CTRL_DD | IOC_CTRL_D4 | IOC_CTRL_TC; 15881da177e4SLinus Torvalds /* j6700 v1.6 firmware sets 0x294f */ 15891da177e4SLinus Torvalds /* A500 firmware sets 0x4d */ 15901da177e4SLinus Torvalds 15911da177e4SLinus Torvalds WRITE_REG(ioc_ctl, sba_dev->sba_hpa+IOC_CTRL); 15921da177e4SLinus Torvalds 15931da177e4SLinus Torvalds #ifdef DEBUG_SBA_INIT 15941da177e4SLinus Torvalds ioc_ctl = READ_REG64(sba_dev->sba_hpa+IOC_CTRL); 15951da177e4SLinus Torvalds DBG_INIT(" 0x%Lx\n", ioc_ctl); 15961da177e4SLinus Torvalds #endif 15971da177e4SLinus Torvalds } /* if !PLUTO */ 15981da177e4SLinus Torvalds 15991b240f41SKyle McMartin if (IS_ASTRO(sba_dev->dev)) { 16001da177e4SLinus Torvalds int err; 16011da177e4SLinus Torvalds sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, ASTRO_IOC_OFFSET); 16021da177e4SLinus Torvalds num_ioc = 1; 16031da177e4SLinus Torvalds 16041da177e4SLinus Torvalds sba_dev->chip_resv.name = "Astro Intr Ack"; 16051da177e4SLinus Torvalds sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfef00000UL; 16061da177e4SLinus Torvalds sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff000000UL - 1) ; 16071da177e4SLinus Torvalds err = request_resource(&iomem_resource, &(sba_dev->chip_resv)); 1608b7494554SEric Sesterhenn BUG_ON(err < 0); 16091da177e4SLinus Torvalds 16101b240f41SKyle McMartin } else if (IS_PLUTO(sba_dev->dev)) { 16111da177e4SLinus Torvalds int err; 16121da177e4SLinus Torvalds 16131da177e4SLinus Torvalds sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, PLUTO_IOC_OFFSET); 16141da177e4SLinus Torvalds num_ioc = 1; 16151da177e4SLinus Torvalds 16161da177e4SLinus Torvalds sba_dev->chip_resv.name = "Pluto Intr/PIOP/VGA"; 16171da177e4SLinus Torvalds sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfee00000UL; 16181da177e4SLinus Torvalds sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff200000UL - 1); 16191da177e4SLinus Torvalds err = request_resource(&iomem_resource, &(sba_dev->chip_resv)); 16201da177e4SLinus Torvalds WARN_ON(err < 0); 16211da177e4SLinus Torvalds 16221da177e4SLinus Torvalds sba_dev->iommu_resv.name = "IOVA Space"; 16231da177e4SLinus Torvalds sba_dev->iommu_resv.start = 0x40000000UL; 16241da177e4SLinus Torvalds sba_dev->iommu_resv.end = 0x50000000UL - 1; 16251da177e4SLinus Torvalds err = request_resource(&iomem_resource, &(sba_dev->iommu_resv)); 16261da177e4SLinus Torvalds WARN_ON(err < 0); 16271da177e4SLinus Torvalds } else { 16287886089eSMatthew Wilcox /* IKE, REO */ 16291da177e4SLinus Torvalds sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(0)); 16301da177e4SLinus Torvalds sba_dev->ioc[1].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(1)); 16311da177e4SLinus Torvalds num_ioc = 2; 16321da177e4SLinus Torvalds 16331da177e4SLinus Torvalds /* TODO - LOOKUP Ike/Stretch chipset mem map */ 16341da177e4SLinus Torvalds } 16357886089eSMatthew Wilcox /* XXX: What about Reo Grande? */ 16361da177e4SLinus Torvalds 16371da177e4SLinus Torvalds sba_dev->num_ioc = num_ioc; 16381da177e4SLinus Torvalds for (i = 0; i < num_ioc; i++) { 163940d78de1SGrant Grundler void __iomem *ioc_hpa = sba_dev->ioc[i].ioc_hpa; 1640b312c33eSGrant Grundler unsigned int j; 16411da177e4SLinus Torvalds 1642b312c33eSGrant Grundler for (j=0; j < sizeof(u64) * ROPES_PER_IOC; j+=sizeof(u64)) { 1643b312c33eSGrant Grundler 1644b312c33eSGrant Grundler /* 1645b312c33eSGrant Grundler * Clear ROPE(N)_CONFIG AO bit. 1646b312c33eSGrant Grundler * Disables "NT Ordering" (~= !"Relaxed Ordering") 1647b312c33eSGrant Grundler * Overrides bit 1 in DMA Hint Sets. 1648b312c33eSGrant Grundler * Improves netperf UDP_STREAM by ~10% for bcm5701. 1649b312c33eSGrant Grundler */ 16501b240f41SKyle McMartin if (IS_PLUTO(sba_dev->dev)) { 165140d78de1SGrant Grundler void __iomem *rope_cfg; 165240d78de1SGrant Grundler unsigned long cfg_val; 1653b312c33eSGrant Grundler 1654b312c33eSGrant Grundler rope_cfg = ioc_hpa + IOC_ROPE0_CFG + j; 1655b312c33eSGrant Grundler cfg_val = READ_REG(rope_cfg); 1656b312c33eSGrant Grundler cfg_val &= ~IOC_ROPE_AO; 1657b312c33eSGrant Grundler WRITE_REG(cfg_val, rope_cfg); 1658b312c33eSGrant Grundler } 1659b312c33eSGrant Grundler 1660b312c33eSGrant Grundler /* 1661b312c33eSGrant Grundler ** Make sure the box crashes on rope errors. 1662b312c33eSGrant Grundler */ 1663b312c33eSGrant Grundler WRITE_REG(HF_ENABLE, ioc_hpa + ROPE0_CTL + j); 1664b312c33eSGrant Grundler } 1665b312c33eSGrant Grundler 1666b312c33eSGrant Grundler /* flush out the last writes */ 16671da177e4SLinus Torvalds READ_REG(sba_dev->ioc[i].ioc_hpa + ROPE7_CTL); 16681da177e4SLinus Torvalds 1669c1ebb940SHelge Deller DBG_INIT(" ioc[%d] ROPE_CFG %#lx ROPE_DBG %lx\n", 16701da177e4SLinus Torvalds i, 1671c1ebb940SHelge Deller (unsigned long) READ_REG(sba_dev->ioc[i].ioc_hpa + 0x40), 1672c1ebb940SHelge Deller (unsigned long) READ_REG(sba_dev->ioc[i].ioc_hpa + 0x50) 16731da177e4SLinus Torvalds ); 1674c1ebb940SHelge Deller DBG_INIT(" STATUS_CONTROL %#lx FLUSH_CTRL %#lx\n", 1675c1ebb940SHelge Deller (unsigned long) READ_REG(sba_dev->ioc[i].ioc_hpa + 0x108), 1676c1ebb940SHelge Deller (unsigned long) READ_REG(sba_dev->ioc[i].ioc_hpa + 0x400) 16771da177e4SLinus Torvalds ); 16781da177e4SLinus Torvalds 16791b240f41SKyle McMartin if (IS_PLUTO(sba_dev->dev)) { 16801da177e4SLinus Torvalds sba_ioc_init_pluto(sba_dev->dev, &(sba_dev->ioc[i]), i); 16811da177e4SLinus Torvalds } else { 16821da177e4SLinus Torvalds sba_ioc_init(sba_dev->dev, &(sba_dev->ioc[i]), i); 16831da177e4SLinus Torvalds } 16841da177e4SLinus Torvalds } 16851da177e4SLinus Torvalds } 16861da177e4SLinus Torvalds 16871da177e4SLinus Torvalds static void 16881da177e4SLinus Torvalds sba_common_init(struct sba_device *sba_dev) 16891da177e4SLinus Torvalds { 16901da177e4SLinus Torvalds int i; 16911da177e4SLinus Torvalds 16921da177e4SLinus Torvalds /* add this one to the head of the list (order doesn't matter) 16931da177e4SLinus Torvalds ** This will be useful for debugging - especially if we get coredumps 16941da177e4SLinus Torvalds */ 16951da177e4SLinus Torvalds sba_dev->next = sba_list; 16961da177e4SLinus Torvalds sba_list = sba_dev; 16971da177e4SLinus Torvalds 16981da177e4SLinus Torvalds for(i=0; i< sba_dev->num_ioc; i++) { 16991da177e4SLinus Torvalds int res_size; 17001da177e4SLinus Torvalds #ifdef DEBUG_DMB_TRAP 17011da177e4SLinus Torvalds extern void iterate_pages(unsigned long , unsigned long , 17021da177e4SLinus Torvalds void (*)(pte_t * , unsigned long), 17031da177e4SLinus Torvalds unsigned long ); 17041da177e4SLinus Torvalds void set_data_memory_break(pte_t * , unsigned long); 17051da177e4SLinus Torvalds #endif 17061da177e4SLinus Torvalds /* resource map size dictated by pdir_size */ 17071da177e4SLinus Torvalds res_size = sba_dev->ioc[i].pdir_size/sizeof(u64); /* entries */ 17081da177e4SLinus Torvalds 17091da177e4SLinus Torvalds /* Second part of PIRANHA BUG */ 17101da177e4SLinus Torvalds if (piranha_bad_128k) { 17111da177e4SLinus Torvalds res_size -= (128*1024)/sizeof(u64); 17121da177e4SLinus Torvalds } 17131da177e4SLinus Torvalds 17141da177e4SLinus Torvalds res_size >>= 3; /* convert bit count to byte count */ 17151da177e4SLinus Torvalds DBG_INIT("%s() res_size 0x%x\n", 1716a8043ecbSHarvey Harrison __func__, res_size); 17171da177e4SLinus Torvalds 17181da177e4SLinus Torvalds sba_dev->ioc[i].res_size = res_size; 17191da177e4SLinus Torvalds sba_dev->ioc[i].res_map = (char *) __get_free_pages(GFP_KERNEL, get_order(res_size)); 17201da177e4SLinus Torvalds 17211da177e4SLinus Torvalds #ifdef DEBUG_DMB_TRAP 17221da177e4SLinus Torvalds iterate_pages( sba_dev->ioc[i].res_map, res_size, 17231da177e4SLinus Torvalds set_data_memory_break, 0); 17241da177e4SLinus Torvalds #endif 17251da177e4SLinus Torvalds 17261da177e4SLinus Torvalds if (NULL == sba_dev->ioc[i].res_map) 17271da177e4SLinus Torvalds { 17281da177e4SLinus Torvalds panic("%s:%s() could not allocate resource map\n", 1729a8043ecbSHarvey Harrison __FILE__, __func__ ); 17301da177e4SLinus Torvalds } 17311da177e4SLinus Torvalds 17321da177e4SLinus Torvalds memset(sba_dev->ioc[i].res_map, 0, res_size); 17331da177e4SLinus Torvalds /* next available IOVP - circular search */ 17341da177e4SLinus Torvalds sba_dev->ioc[i].res_hint = (unsigned long *) 17351da177e4SLinus Torvalds &(sba_dev->ioc[i].res_map[L1_CACHE_BYTES]); 17361da177e4SLinus Torvalds 17371da177e4SLinus Torvalds #ifdef ASSERT_PDIR_SANITY 17381da177e4SLinus Torvalds /* Mark first bit busy - ie no IOVA 0 */ 17391da177e4SLinus Torvalds sba_dev->ioc[i].res_map[0] = 0x80; 1740c1ebb940SHelge Deller sba_dev->ioc[i].pdir_base[0] = (__force __le64) 0xeeffc0addbba0080ULL; 17411da177e4SLinus Torvalds #endif 17421da177e4SLinus Torvalds 17431da177e4SLinus Torvalds /* Third (and last) part of PIRANHA BUG */ 17441da177e4SLinus Torvalds if (piranha_bad_128k) { 17451da177e4SLinus Torvalds /* region from +1408K to +1536 is un-usable. */ 17461da177e4SLinus Torvalds 17471da177e4SLinus Torvalds int idx_start = (1408*1024/sizeof(u64)) >> 3; 17481da177e4SLinus Torvalds int idx_end = (1536*1024/sizeof(u64)) >> 3; 17491da177e4SLinus Torvalds long *p_start = (long *) &(sba_dev->ioc[i].res_map[idx_start]); 17501da177e4SLinus Torvalds long *p_end = (long *) &(sba_dev->ioc[i].res_map[idx_end]); 17511da177e4SLinus Torvalds 17521da177e4SLinus Torvalds /* mark that part of the io pdir busy */ 17531da177e4SLinus Torvalds while (p_start < p_end) 17541da177e4SLinus Torvalds *p_start++ = -1; 17551da177e4SLinus Torvalds 17561da177e4SLinus Torvalds } 17571da177e4SLinus Torvalds 17581da177e4SLinus Torvalds #ifdef DEBUG_DMB_TRAP 17591da177e4SLinus Torvalds iterate_pages( sba_dev->ioc[i].res_map, res_size, 17601da177e4SLinus Torvalds set_data_memory_break, 0); 17611da177e4SLinus Torvalds iterate_pages( sba_dev->ioc[i].pdir_base, sba_dev->ioc[i].pdir_size, 17621da177e4SLinus Torvalds set_data_memory_break, 0); 17631da177e4SLinus Torvalds #endif 17641da177e4SLinus Torvalds 17651da177e4SLinus Torvalds DBG_INIT("%s() %d res_map %x %p\n", 1766a8043ecbSHarvey Harrison __func__, i, res_size, sba_dev->ioc[i].res_map); 17671da177e4SLinus Torvalds } 17681da177e4SLinus Torvalds 17691da177e4SLinus Torvalds spin_lock_init(&sba_dev->sba_lock); 17701da177e4SLinus Torvalds ioc_needs_fdc = boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC; 17711da177e4SLinus Torvalds 17721da177e4SLinus Torvalds #ifdef DEBUG_SBA_INIT 17731da177e4SLinus Torvalds /* 17741da177e4SLinus Torvalds * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set 17751da177e4SLinus Torvalds * (bit #61, big endian), we have to flush and sync every time 17761da177e4SLinus Torvalds * IO-PDIR is changed in Ike/Astro. 17771da177e4SLinus Torvalds */ 1778692086e0SKyle McMartin if (ioc_needs_fdc) { 17791da177e4SLinus Torvalds printk(KERN_INFO MODULE_NAME " FDC/SYNC required.\n"); 17801da177e4SLinus Torvalds } else { 17811da177e4SLinus Torvalds printk(KERN_INFO MODULE_NAME " IOC has cache coherent PDIR.\n"); 17821da177e4SLinus Torvalds } 17831da177e4SLinus Torvalds #endif 17841da177e4SLinus Torvalds } 17851da177e4SLinus Torvalds 17861da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 17877ec14e49SKyle McMartin static int sba_proc_info(struct seq_file *m, void *p) 17881da177e4SLinus Torvalds { 17891da177e4SLinus Torvalds struct sba_device *sba_dev = sba_list; 17901da177e4SLinus Torvalds struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */ 17911da177e4SLinus Torvalds int total_pages = (int) (ioc->res_size << 3); /* 8 bits per byte */ 17921da177e4SLinus Torvalds #ifdef SBA_COLLECT_STATS 17931da177e4SLinus Torvalds unsigned long avg = 0, min, max; 17941da177e4SLinus Torvalds #endif 1795e693d73cSJoe Perches int i; 17961da177e4SLinus Torvalds 1797e693d73cSJoe Perches seq_printf(m, "%s rev %d.%d\n", 17981da177e4SLinus Torvalds sba_dev->name, 17991da177e4SLinus Torvalds (sba_dev->hw_rev & 0x7) + 1, 1800e693d73cSJoe Perches (sba_dev->hw_rev & 0x18) >> 3); 1801e693d73cSJoe Perches seq_printf(m, "IO PDIR size : %d bytes (%d entries)\n", 18021da177e4SLinus Torvalds (int)((ioc->res_size << 3) * sizeof(u64)), /* 8 bits/byte */ 18031da177e4SLinus Torvalds total_pages); 18041da177e4SLinus Torvalds 1805e693d73cSJoe Perches seq_printf(m, "Resource bitmap : %d bytes (%d pages)\n", 18067ec14e49SKyle McMartin ioc->res_size, ioc->res_size << 3); /* 8 bits per byte */ 18071da177e4SLinus Torvalds 1808e693d73cSJoe Perches seq_printf(m, "LMMIO_BASE/MASK/ROUTE %08x %08x %08x\n", 18091da177e4SLinus Torvalds READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_BASE), 18101da177e4SLinus Torvalds READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_MASK), 1811e693d73cSJoe Perches READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_ROUTE)); 18121da177e4SLinus Torvalds 18131da177e4SLinus Torvalds for (i=0; i<4; i++) 1814e693d73cSJoe Perches seq_printf(m, "DIR%d_BASE/MASK/ROUTE %08x %08x %08x\n", 1815e693d73cSJoe Perches i, 18161da177e4SLinus Torvalds READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_BASE + i*0x18), 18171da177e4SLinus Torvalds READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_MASK + i*0x18), 1818e693d73cSJoe Perches READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_ROUTE + i*0x18)); 18191da177e4SLinus Torvalds 18201da177e4SLinus Torvalds #ifdef SBA_COLLECT_STATS 1821e693d73cSJoe Perches seq_printf(m, "IO PDIR entries : %ld free %ld used (%d%%)\n", 18221da177e4SLinus Torvalds total_pages - ioc->used_pages, ioc->used_pages, 18231da177e4SLinus Torvalds (int)(ioc->used_pages * 100 / total_pages)); 18241da177e4SLinus Torvalds 18251da177e4SLinus Torvalds min = max = ioc->avg_search[0]; 18261da177e4SLinus Torvalds for (i = 0; i < SBA_SEARCH_SAMPLE; i++) { 18271da177e4SLinus Torvalds avg += ioc->avg_search[i]; 18281da177e4SLinus Torvalds if (ioc->avg_search[i] > max) max = ioc->avg_search[i]; 18291da177e4SLinus Torvalds if (ioc->avg_search[i] < min) min = ioc->avg_search[i]; 18301da177e4SLinus Torvalds } 18311da177e4SLinus Torvalds avg /= SBA_SEARCH_SAMPLE; 1832e693d73cSJoe Perches seq_printf(m, " Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n", 18337ec14e49SKyle McMartin min, avg, max); 18341da177e4SLinus Torvalds 1835e693d73cSJoe Perches seq_printf(m, "pci_map_single(): %12ld calls %12ld pages (avg %d/1000)\n", 18367ec14e49SKyle McMartin ioc->msingle_calls, ioc->msingle_pages, 18371da177e4SLinus Torvalds (int)((ioc->msingle_pages * 1000)/ioc->msingle_calls)); 18381da177e4SLinus Torvalds 18391da177e4SLinus Torvalds /* KLUGE - unmap_sg calls unmap_single for each mapped page */ 18401da177e4SLinus Torvalds min = ioc->usingle_calls; 18411da177e4SLinus Torvalds max = ioc->usingle_pages - ioc->usg_pages; 1842e693d73cSJoe Perches seq_printf(m, "pci_unmap_single: %12ld calls %12ld pages (avg %d/1000)\n", 18437ec14e49SKyle McMartin min, max, (int)((max * 1000)/min)); 18441da177e4SLinus Torvalds 1845e693d73cSJoe Perches seq_printf(m, "pci_map_sg() : %12ld calls %12ld pages (avg %d/1000)\n", 18467ec14e49SKyle McMartin ioc->msg_calls, ioc->msg_pages, 18471da177e4SLinus Torvalds (int)((ioc->msg_pages * 1000)/ioc->msg_calls)); 18481da177e4SLinus Torvalds 1849e693d73cSJoe Perches seq_printf(m, "pci_unmap_sg() : %12ld calls %12ld pages (avg %d/1000)\n", 18507ec14e49SKyle McMartin ioc->usg_calls, ioc->usg_pages, 18511da177e4SLinus Torvalds (int)((ioc->usg_pages * 1000)/ioc->usg_calls)); 18521da177e4SLinus Torvalds #endif 18531da177e4SLinus Torvalds 18547ec14e49SKyle McMartin return 0; 18551da177e4SLinus Torvalds } 18561da177e4SLinus Torvalds 18571da177e4SLinus Torvalds static int 18587ec14e49SKyle McMartin sba_proc_bitmap_info(struct seq_file *m, void *p) 18591da177e4SLinus Torvalds { 18601da177e4SLinus Torvalds struct sba_device *sba_dev = sba_list; 18617ec14e49SKyle McMartin struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */ 18621da177e4SLinus Torvalds 1863b342a65dSAndy Shevchenko seq_hex_dump(m, " ", DUMP_PREFIX_NONE, 32, 4, ioc->res_map, 1864b342a65dSAndy Shevchenko ioc->res_size, false); 1865e693d73cSJoe Perches seq_putc(m, '\n'); 18661da177e4SLinus Torvalds 18677ec14e49SKyle McMartin return 0; 18681da177e4SLinus Torvalds } 18691da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 18701da177e4SLinus Torvalds 1871cfe4fbfbSHelge Deller static const struct parisc_device_id sba_tbl[] __initconst = { 18721da177e4SLinus Torvalds { HPHW_IOA, HVERSION_REV_ANY_ID, ASTRO_RUNWAY_PORT, 0xb }, 18731da177e4SLinus Torvalds { HPHW_BCPORT, HVERSION_REV_ANY_ID, IKE_MERCED_PORT, 0xc }, 18741da177e4SLinus Torvalds { HPHW_BCPORT, HVERSION_REV_ANY_ID, REO_MERCED_PORT, 0xc }, 18751da177e4SLinus Torvalds { HPHW_BCPORT, HVERSION_REV_ANY_ID, REOG_MERCED_PORT, 0xc }, 18761da177e4SLinus Torvalds { HPHW_IOA, HVERSION_REV_ANY_ID, PLUTO_MCKINLEY_PORT, 0xc }, 18771da177e4SLinus Torvalds { 0, } 18781da177e4SLinus Torvalds }; 18791da177e4SLinus Torvalds 1880df8e5bc6SAdrian Bunk static int sba_driver_callback(struct parisc_device *); 18811da177e4SLinus Torvalds 1882cfe4fbfbSHelge Deller static struct parisc_driver sba_driver __refdata = { 18831da177e4SLinus Torvalds .name = MODULE_NAME, 18841da177e4SLinus Torvalds .id_table = sba_tbl, 18851da177e4SLinus Torvalds .probe = sba_driver_callback, 18861da177e4SLinus Torvalds }; 18871da177e4SLinus Torvalds 18881da177e4SLinus Torvalds /* 18891da177e4SLinus Torvalds ** Determine if sba should claim this chip (return 0) or not (return 1). 18901da177e4SLinus Torvalds ** If so, initialize the chip and tell other partners in crime they 18911da177e4SLinus Torvalds ** have work to do. 18921da177e4SLinus Torvalds */ 1893cfe4fbfbSHelge Deller static int __init sba_driver_callback(struct parisc_device *dev) 18941da177e4SLinus Torvalds { 18951da177e4SLinus Torvalds struct sba_device *sba_dev; 18961da177e4SLinus Torvalds u32 func_class; 18971da177e4SLinus Torvalds int i; 18981da177e4SLinus Torvalds char *version; 18994bdc0d67SChristoph Hellwig void __iomem *sba_addr = ioremap(dev->hpa.start, SBA_FUNC_SIZE); 19006428bc7bSHelge Deller struct proc_dir_entry *root __maybe_unused; 19011da177e4SLinus Torvalds 19021da177e4SLinus Torvalds sba_dump_ranges(sba_addr); 19031da177e4SLinus Torvalds 19041da177e4SLinus Torvalds /* Read HW Rev First */ 19051da177e4SLinus Torvalds func_class = READ_REG(sba_addr + SBA_FCLASS); 19061da177e4SLinus Torvalds 19071b240f41SKyle McMartin if (IS_ASTRO(dev)) { 19081da177e4SLinus Torvalds unsigned long fclass; 19091da177e4SLinus Torvalds static char astro_rev[]="Astro ?.?"; 19101da177e4SLinus Torvalds 19111da177e4SLinus Torvalds /* Astro is broken...Read HW Rev First */ 19121da177e4SLinus Torvalds fclass = READ_REG(sba_addr); 19131da177e4SLinus Torvalds 19141da177e4SLinus Torvalds astro_rev[6] = '1' + (char) (fclass & 0x7); 19151da177e4SLinus Torvalds astro_rev[8] = '0' + (char) ((fclass & 0x18) >> 3); 19161da177e4SLinus Torvalds version = astro_rev; 19171da177e4SLinus Torvalds 19181b240f41SKyle McMartin } else if (IS_IKE(dev)) { 19191da177e4SLinus Torvalds static char ike_rev[] = "Ike rev ?"; 19201da177e4SLinus Torvalds ike_rev[8] = '0' + (char) (func_class & 0xff); 19211da177e4SLinus Torvalds version = ike_rev; 19221b240f41SKyle McMartin } else if (IS_PLUTO(dev)) { 19231da177e4SLinus Torvalds static char pluto_rev[]="Pluto ?.?"; 19241da177e4SLinus Torvalds pluto_rev[6] = '0' + (char) ((func_class & 0xf0) >> 4); 19251da177e4SLinus Torvalds pluto_rev[8] = '0' + (char) (func_class & 0x0f); 19261da177e4SLinus Torvalds version = pluto_rev; 19271da177e4SLinus Torvalds } else { 19281da177e4SLinus Torvalds static char reo_rev[] = "REO rev ?"; 19291da177e4SLinus Torvalds reo_rev[8] = '0' + (char) (func_class & 0xff); 19301da177e4SLinus Torvalds version = reo_rev; 19311da177e4SLinus Torvalds } 19321da177e4SLinus Torvalds 19331da177e4SLinus Torvalds if (!global_ioc_cnt) { 19341da177e4SLinus Torvalds global_ioc_cnt = count_parisc_driver(&sba_driver); 19351da177e4SLinus Torvalds 19361da177e4SLinus Torvalds /* Astro and Pluto have one IOC per SBA */ 19371b240f41SKyle McMartin if ((!IS_ASTRO(dev)) || (!IS_PLUTO(dev))) 19381da177e4SLinus Torvalds global_ioc_cnt *= 2; 19391da177e4SLinus Torvalds } 19401da177e4SLinus Torvalds 1941e9a03990SKyle McMartin printk(KERN_INFO "%s found %s at 0x%llx\n", 1942e9a03990SKyle McMartin MODULE_NAME, version, (unsigned long long)dev->hpa.start); 19431da177e4SLinus Torvalds 1944cb6fc18eSHelge Deller sba_dev = kzalloc(sizeof(struct sba_device), GFP_KERNEL); 19451da177e4SLinus Torvalds if (!sba_dev) { 19461da177e4SLinus Torvalds printk(KERN_ERR MODULE_NAME " - couldn't alloc sba_device\n"); 19471da177e4SLinus Torvalds return -ENOMEM; 19481da177e4SLinus Torvalds } 19491da177e4SLinus Torvalds 19501da177e4SLinus Torvalds parisc_set_drvdata(dev, sba_dev); 19511da177e4SLinus Torvalds 19521da177e4SLinus Torvalds for(i=0; i<MAX_IOC; i++) 19531da177e4SLinus Torvalds spin_lock_init(&(sba_dev->ioc[i].res_lock)); 19541da177e4SLinus Torvalds 19551da177e4SLinus Torvalds sba_dev->dev = dev; 19561da177e4SLinus Torvalds sba_dev->hw_rev = func_class; 19571da177e4SLinus Torvalds sba_dev->name = dev->name; 19581da177e4SLinus Torvalds sba_dev->sba_hpa = sba_addr; 19591da177e4SLinus Torvalds 19601da177e4SLinus Torvalds sba_get_pat_resources(sba_dev); 19611da177e4SLinus Torvalds sba_hw_init(sba_dev); 19621da177e4SLinus Torvalds sba_common_init(sba_dev); 19631da177e4SLinus Torvalds 19641da177e4SLinus Torvalds hppa_dma_ops = &sba_ops; 19651da177e4SLinus Torvalds 19667ec14e49SKyle McMartin switch (dev->id.hversion) { 19677ec14e49SKyle McMartin case PLUTO_MCKINLEY_PORT: 196854725958SHelge Deller if (!proc_mckinley_root) 196954725958SHelge Deller proc_mckinley_root = proc_mkdir("bus/mckinley", NULL); 19707ec14e49SKyle McMartin root = proc_mckinley_root; 19717ec14e49SKyle McMartin break; 19727ec14e49SKyle McMartin case ASTRO_RUNWAY_PORT: 19737ec14e49SKyle McMartin case IKE_MERCED_PORT: 19747ec14e49SKyle McMartin default: 197554725958SHelge Deller if (!proc_runway_root) 197654725958SHelge Deller proc_runway_root = proc_mkdir("bus/runway", NULL); 19777ec14e49SKyle McMartin root = proc_runway_root; 19787ec14e49SKyle McMartin break; 19791da177e4SLinus Torvalds } 19807ec14e49SKyle McMartin 19813f3942acSChristoph Hellwig proc_create_single("sba_iommu", 0, root, sba_proc_info); 19823f3942acSChristoph Hellwig proc_create_single("sba_iommu-bitmap", 0, root, sba_proc_bitmap_info); 19831da177e4SLinus Torvalds return 0; 19841da177e4SLinus Torvalds } 19851da177e4SLinus Torvalds 19861da177e4SLinus Torvalds /* 19871da177e4SLinus Torvalds ** One time initialization to let the world know the SBA was found. 19881da177e4SLinus Torvalds ** This is the only routine which is NOT static. 19891da177e4SLinus Torvalds ** Must be called exactly once before pci_init(). 19901da177e4SLinus Torvalds */ 199153861a91SHelge Deller static int __init sba_init(void) 19921da177e4SLinus Torvalds { 199353861a91SHelge Deller return register_parisc_driver(&sba_driver); 19941da177e4SLinus Torvalds } 199553861a91SHelge Deller arch_initcall(sba_init); 19961da177e4SLinus Torvalds 19971da177e4SLinus Torvalds 19981da177e4SLinus Torvalds /** 19991da177e4SLinus Torvalds * sba_get_iommu - Assign the iommu pointer for the pci bus controller. 2000226b8ab8SHelge Deller * @pci_hba: The parisc device. 20011da177e4SLinus Torvalds * 20021da177e4SLinus Torvalds * Returns the appropriate IOMMU data for the given parisc PCI controller. 20031da177e4SLinus Torvalds * This is cached and used later for PCI DMA Mapping. 20041da177e4SLinus Torvalds */ 20051da177e4SLinus Torvalds void * sba_get_iommu(struct parisc_device *pci_hba) 20061da177e4SLinus Torvalds { 20071da177e4SLinus Torvalds struct parisc_device *sba_dev = parisc_parent(pci_hba); 2008d18dbfa7SGreg Kroah-Hartman struct sba_device *sba = dev_get_drvdata(&sba_dev->dev); 20091da177e4SLinus Torvalds char t = sba_dev->id.hw_type; 201058ad89e8SHelge Deller int iocnum = (pci_hba->hw_path >> 3); /* IOC # */ 20111da177e4SLinus Torvalds 20121da177e4SLinus Torvalds WARN_ON((t != HPHW_IOA) && (t != HPHW_BCPORT)); 20131da177e4SLinus Torvalds 20141da177e4SLinus Torvalds return &(sba->ioc[iocnum]); 20151da177e4SLinus Torvalds } 20161da177e4SLinus Torvalds 20171da177e4SLinus Torvalds 20181da177e4SLinus Torvalds /** 20191da177e4SLinus Torvalds * sba_directed_lmmio - return first directed LMMIO range routed to rope 2020226b8ab8SHelge Deller * @pci_hba: The parisc device. 20211da177e4SLinus Torvalds * @r: resource PCI host controller wants start/end fields assigned. 20221da177e4SLinus Torvalds * 20231da177e4SLinus Torvalds * For the given parisc PCI controller, determine if any direct ranges 20241da177e4SLinus Torvalds * are routed down the corresponding rope. 20251da177e4SLinus Torvalds */ 20261da177e4SLinus Torvalds void sba_directed_lmmio(struct parisc_device *pci_hba, struct resource *r) 20271da177e4SLinus Torvalds { 20281da177e4SLinus Torvalds struct parisc_device *sba_dev = parisc_parent(pci_hba); 2029d18dbfa7SGreg Kroah-Hartman struct sba_device *sba = dev_get_drvdata(&sba_dev->dev); 20301da177e4SLinus Torvalds char t = sba_dev->id.hw_type; 20311da177e4SLinus Torvalds int i; 20321da177e4SLinus Torvalds int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */ 20331da177e4SLinus Torvalds 2034b7494554SEric Sesterhenn BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT)); 20351da177e4SLinus Torvalds 20361da177e4SLinus Torvalds r->start = r->end = 0; 20371da177e4SLinus Torvalds 20381da177e4SLinus Torvalds /* Astro has 4 directed ranges. Not sure about Ike/Pluto/et al */ 20391da177e4SLinus Torvalds for (i=0; i<4; i++) { 20401da177e4SLinus Torvalds int base, size; 20411da177e4SLinus Torvalds void __iomem *reg = sba->sba_hpa + i*0x18; 20421da177e4SLinus Torvalds 20431da177e4SLinus Torvalds base = READ_REG32(reg + LMMIO_DIRECT0_BASE); 20441da177e4SLinus Torvalds if ((base & 1) == 0) 20451da177e4SLinus Torvalds continue; /* not enabled */ 20461da177e4SLinus Torvalds 20471da177e4SLinus Torvalds size = READ_REG32(reg + LMMIO_DIRECT0_ROUTE); 20481da177e4SLinus Torvalds 20491da177e4SLinus Torvalds if ((size & (ROPES_PER_IOC-1)) != rope) 20501da177e4SLinus Torvalds continue; /* directed down different rope */ 20511da177e4SLinus Torvalds 20521da177e4SLinus Torvalds r->start = (base & ~1UL) | PCI_F_EXTEND; 20531da177e4SLinus Torvalds size = ~ READ_REG32(reg + LMMIO_DIRECT0_MASK); 20541da177e4SLinus Torvalds r->end = r->start + size; 2055ca0844e3SMatthew Wilcox r->flags = IORESOURCE_MEM; 20561da177e4SLinus Torvalds } 20571da177e4SLinus Torvalds } 20581da177e4SLinus Torvalds 20591da177e4SLinus Torvalds 20601da177e4SLinus Torvalds /** 20611da177e4SLinus Torvalds * sba_distributed_lmmio - return portion of distributed LMMIO range 2062226b8ab8SHelge Deller * @pci_hba: The parisc device. 20631da177e4SLinus Torvalds * @r: resource PCI host controller wants start/end fields assigned. 20641da177e4SLinus Torvalds * 20651da177e4SLinus Torvalds * For the given parisc PCI controller, return portion of distributed LMMIO 20661da177e4SLinus Torvalds * range. The distributed LMMIO is always present and it's just a question 20671da177e4SLinus Torvalds * of the base address and size of the range. 20681da177e4SLinus Torvalds */ 20691da177e4SLinus Torvalds void sba_distributed_lmmio(struct parisc_device *pci_hba, struct resource *r ) 20701da177e4SLinus Torvalds { 20711da177e4SLinus Torvalds struct parisc_device *sba_dev = parisc_parent(pci_hba); 2072d18dbfa7SGreg Kroah-Hartman struct sba_device *sba = dev_get_drvdata(&sba_dev->dev); 20731da177e4SLinus Torvalds char t = sba_dev->id.hw_type; 20741da177e4SLinus Torvalds int base, size; 20751da177e4SLinus Torvalds int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */ 20761da177e4SLinus Torvalds 2077b7494554SEric Sesterhenn BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT)); 20781da177e4SLinus Torvalds 20791da177e4SLinus Torvalds r->start = r->end = 0; 20801da177e4SLinus Torvalds 20811da177e4SLinus Torvalds base = READ_REG32(sba->sba_hpa + LMMIO_DIST_BASE); 20821da177e4SLinus Torvalds if ((base & 1) == 0) { 20831da177e4SLinus Torvalds BUG(); /* Gah! Distr Range wasn't enabled! */ 20841da177e4SLinus Torvalds return; 20851da177e4SLinus Torvalds } 20861da177e4SLinus Torvalds 20871da177e4SLinus Torvalds r->start = (base & ~1UL) | PCI_F_EXTEND; 20881da177e4SLinus Torvalds 20891da177e4SLinus Torvalds size = (~READ_REG32(sba->sba_hpa + LMMIO_DIST_MASK)) / ROPES_PER_IOC; 20901da177e4SLinus Torvalds r->start += rope * (size + 1); /* adjust base for this rope */ 20911da177e4SLinus Torvalds r->end = r->start + size; 2092ca0844e3SMatthew Wilcox r->flags = IORESOURCE_MEM; 20931da177e4SLinus Torvalds } 2094