11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Adaptec AAC series RAID controller driver 3fa195afe4ad3f6d85a9b7cc236ae85c05ca8db03Alan Cox * (c) Copyright 2001 Red Hat Inc. 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * based on the old aacraid driver that is.. 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Adaptec aacraid device driver for Linux. 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8e8b12f0fb8352237525961f14ec933e915848840Mahesh Rajashekhara * Copyright (c) 2000-2010 Adaptec, Inc. 9e8b12f0fb8352237525961f14ec933e915848840Mahesh Rajashekhara * 2010 PMC-Sierra, Inc. (aacraid@pmc-sierra.com) 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it under the terms of the GNU General Public License as published by 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the Free Software Foundation; either version 2, or (at your option) 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * any later version. 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * GNU General Public License for more details. 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * along with this program; see the file COPYING. If not, write to 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Module Name: 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sa.c 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Abstract: Drawbridge specific support functions 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 358ef2224707996aede1808f40116cd467b7c8d549Salyzyn, Mark#include <linux/pci.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/spinlock.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/blkdev.h> 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/delay.h> 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/completion.h> 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/time.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/interrupt.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi_host.h> 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "aacraid.h" 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 477d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsstatic irqreturn_t aac_sa_intr(int irq, void *dev_id) 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aac_dev *dev = dev_id; 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short intstat, mask; 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds intstat = sa_readw(dev, DoorbellReg_p); 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Read mask and invert because drawbridge is reversed. 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This allows us to only service interrupts that have been enabled. 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK)); 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check to see if this is our interrupt. If it isn't just return */ 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (intstat & mask) { 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (intstat & PrintfReady) { 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aac_printf(dev, sa_readl(dev, Mailbox5)); 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */ 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellReg_s, PrintfDone); 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (intstat & DOORBELL_1) { // dev -> Host Normal Command Ready 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellClrReg_p, DOORBELL_1); 68df3b7668715f9acfe6ff37dd886f68e46ccd677eMark Haverkamp aac_command_normal(&dev->queues->queue[HostNormCmdQueue]); 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (intstat & DOORBELL_2) { // dev -> Host Normal Response Ready 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellClrReg_p, DOORBELL_2); 71df3b7668715f9acfe6ff37dd886f68e46ccd677eMark Haverkamp aac_response_normal(&dev->queues->queue[HostNormRespQueue]); 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (intstat & DOORBELL_3) { // dev -> Host Normal Command Not Full 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellClrReg_p, DOORBELL_3); 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (intstat & DOORBELL_4) { // dev -> Host Normal Response Not Full 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellClrReg_p, DOORBELL_4); 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_HANDLED; 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 83bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp * aac_sa_disable_interrupt - disable interrupt 84bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp * @dev: Which adapter to enable. 85bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp */ 86bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp 87bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkampstatic void aac_sa_disable_interrupt (struct aac_dev *dev) 88bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp{ 89bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff); 90bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp} 91bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp 92bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp/** 9328713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp * aac_sa_enable_interrupt - enable interrupt 9428713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp * @dev: Which adapter to enable. 9528713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp */ 9628713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp 9728713324a0f3c055186ecec27239673c36ba1de5Mark Haverkampstatic void aac_sa_enable_interrupt (struct aac_dev *dev) 9828713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp{ 9928713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | 10028713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp DOORBELL_2 | DOORBELL_3 | DOORBELL_4)); 10128713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp} 10228713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp 10328713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp/** 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * aac_sa_notify_adapter - handle adapter notification 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: Adapter that notification is for 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @event: Event to notidy 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notify the adapter of an event 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1114833869e6e6c2315e301c256e393dfb949c10076Adrian Bunkstatic void aac_sa_notify_adapter(struct aac_dev *dev, u32 event) 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (event) { 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case AdapNormCmdQue: 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellReg_s,DOORBELL_1); 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HostNormRespNotFull: 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellReg_s,DOORBELL_4); 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case AdapNormRespQue: 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellReg_s,DOORBELL_2); 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HostNormCmdNotFull: 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellReg_s,DOORBELL_3); 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HostShutdown: 1287c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp /* 1297c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0, 1307c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp NULL, NULL, NULL, NULL, NULL); 1317c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp */ 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FastIo: 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellReg_s,DOORBELL_6); 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case AdapPrintfDone: 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellReg_s,DOORBELL_5); 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUG(); 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sa_sync_cmd - send a command and wait 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: Adapter 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @command: Command to execute 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @p1: first parameter 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @ret: adapter status 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This routine will send a synchronous command to the adapter and wait 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for its completion. 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1577c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkampstatic int sa_sync_cmd(struct aac_dev *dev, u32 command, 1587c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6, 1597c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4) 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long start; 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ok; 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Write the Command into Mailbox 0 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writel(dev, Mailbox0, command); 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Write the parameters into Mailboxes 1 - 4 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writel(dev, Mailbox1, p1); 1717c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp sa_writel(dev, Mailbox2, p2); 1727c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp sa_writel(dev, Mailbox3, p3); 1737c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp sa_writel(dev, Mailbox4, p4); 1747c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Clear the synch command doorbell to start on a clean slate. 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellClrReg_p, DOORBELL_0); 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Signal that there is a new synch command 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellReg_s, DOORBELL_0); 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ok = 0; 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start = jiffies; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(time_before(jiffies, start+30*HZ)) 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Delay 5uS so that the monitor gets access 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds udelay(5); 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Mon110 will set doorbell0 bit when it has 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * completed the command. 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0) { 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ok = 1; 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2011241f3593a8857fab4259b6aa9d17f26e7de3a86Mark Haverkamp msleep(1); 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ok != 1) 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ETIMEDOUT; 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Clear the synch command doorbell. 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_writew(dev, DoorbellClrReg_p, DOORBELL_0); 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Pull the synch status from Mailbox 0. 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *ret = sa_readl(dev, Mailbox0); 2157c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp if (r1) 2167c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp *r1 = sa_readl(dev, Mailbox1); 2177c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp if (r2) 2187c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp *r2 = sa_readl(dev, Mailbox2); 2197c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp if (r3) 2207c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp *r3 = sa_readl(dev, Mailbox3); 2217c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp if (r4) 2227c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp *r4 = sa_readl(dev, Mailbox4); 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * aac_sa_interrupt_adapter - interrupt an adapter 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: Which adapter to enable. 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Breakpoint an adapter. 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void aac_sa_interrupt_adapter (struct aac_dev *dev) 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2357c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, 236bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp NULL, NULL, NULL, NULL, NULL); 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * aac_sa_start_adapter - activate adapter 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: Adapter 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Start up processing on an ARM based AAC adapter 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void aac_sa_start_adapter(struct aac_dev *dev) 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aac_init *init; 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Fill in the remaining pieces of the init. 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init = dev->init; 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init->HostElapsedSeconds = cpu_to_le32(get_seconds()); 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can only use a 32 bit address here */ 2557c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, 2567c00ffa314bf0fb0e23858bbebad33b48b6abbb9Mark Haverkamp (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0, 2578e0c5ebde82b08f6d996e11983890fc4cc085fabMark Haverkamp NULL, NULL, NULL, NULL, NULL); 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2602ab01efd1d2a24db53b4c5d28a2e20cf2b1206c5Salyzyn, Markstatic int aac_sa_restart_adapter(struct aac_dev *dev, int bled) 2612ab01efd1d2a24db53b4c5d28a2e20cf2b1206c5Salyzyn, Mark{ 2622ab01efd1d2a24db53b4c5d28a2e20cf2b1206c5Salyzyn, Mark return -EINVAL; 2632ab01efd1d2a24db53b4c5d28a2e20cf2b1206c5Salyzyn, Mark} 2642ab01efd1d2a24db53b4c5d28a2e20cf2b1206c5Salyzyn, Mark 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * aac_sa_check_health 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device to check if healthy 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Will attempt to determine if the specified adapter is alive and 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * capable of handling requests, returning 0 if alive. 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int aac_sa_check_health(struct aac_dev *dev) 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long status = sa_readl(dev, Mailbox7); 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Check to see if the board failed any self tests. 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status & SELF_TEST_FAILED) 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Check to see if the board panic'd while booting. 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status & KERNEL_PANIC) 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -2; 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Wait for the adapter to be up and running. Wait up to 3 minutes 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(status & KERNEL_UP_AND_RUNNING)) 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -3; 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Everything is OK 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 29876a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp * aac_sa_ioremap 29976a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp * @size: mapping resize request 30076a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp * 30176a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp */ 30276a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkampstatic int aac_sa_ioremap(struct aac_dev * dev, u32 size) 30376a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp{ 30476a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp if (!size) { 30576a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp iounmap(dev->regs.sa); 30676a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp return 0; 30776a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp } 30876a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp dev->base = dev->regs.sa = ioremap(dev->scsi_host_ptr->base, size); 30976a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp return (dev->base == NULL) ? -1 : 0; 31076a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp} 31176a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp 31276a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp/** 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * aac_sa_init - initialize an ARM based AAC card 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device to configure 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate and set up resources for the ARM based AAC variants. The 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * device_interface in the commregion will be allocated and linked 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to the comm region. 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint aac_sa_init(struct aac_dev *dev) 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long start; 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long status; 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int instance; 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const char *name; 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds instance = dev->id; 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds name = dev->name; 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33176a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp if (aac_sa_ioremap(dev, dev->base_size)) { 33276a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp printk(KERN_WARNING "%s: unable to map adapter.\n", name); 33376a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp goto error_iounmap; 33476a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp } 33576a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Check to see if the board failed any self tests. 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) { 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance); 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error_iounmap; 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Check to see if the board panic'd while booting. 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) { 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance); 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error_iounmap; 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start = jiffies; 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Wait for the adapter to be up and running. Wait up to 3 minutes. 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) { 355404d9a900b5bc83a3780ec337ca6fdcb04b766c0Mark Haverkamp if (time_after(jiffies, start+startup_timeout*HZ)) { 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = sa_readl(dev, Mailbox7); 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n", 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds name, instance, status); 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error_iounmap; 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 361404d9a900b5bc83a3780ec337ca6fdcb04b766c0Mark Haverkamp msleep(1); 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Fill in the function dispatch table. 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter; 369bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt; 37028713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt; 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->a_ops.adapter_notify = aac_sa_notify_adapter; 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->a_ops.adapter_sync_cmd = sa_sync_cmd; 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->a_ops.adapter_check_health = aac_sa_check_health; 3742ab01efd1d2a24db53b4c5d28a2e20cf2b1206c5Salyzyn, Mark dev->a_ops.adapter_restart = aac_sa_restart_adapter; 37528713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp dev->a_ops.adapter_intr = aac_sa_intr; 3762ab01efd1d2a24db53b4c5d28a2e20cf2b1206c5Salyzyn, Mark dev->a_ops.adapter_deliver = aac_rx_deliver_producer; 37776a7f8fdc0c2381ae1ba55ef71837712223ecb3cMark Haverkamp dev->a_ops.adapter_ioremap = aac_sa_ioremap; 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 379bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp /* 380bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp * First clear out all interrupts. Then enable the one's that 381bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp * we can handle. 382bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9Mark Haverkamp */ 38328713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp aac_adapter_disable_int(dev); 38428713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp aac_adapter_enable_int(dev); 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(aac_init_adapter(dev) == NULL) 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error_irq; 388116046127d1a3bad2853d02781ad9fee33f05e5aMahesh Rajashekhara dev->sync_mode = 0; /* sync. mode not supported */ 3898ef2224707996aede1808f40116cd467b7c8d549Salyzyn, Mark if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr, 39028713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp IRQF_SHARED|IRQF_DISABLED, 39128713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp "aacraid", (void *)dev ) < 0) { 39228713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", 39328713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp name, instance); 39428713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp goto error_iounmap; 39528713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp } 396e8b12f0fb8352237525961f14ec933e915848840Mahesh Rajashekhara dev->dbg_base = dev->scsi_host_ptr->base; 397e8b12f0fb8352237525961f14ec933e915848840Mahesh Rajashekhara dev->dbg_base_mapped = dev->base; 398e8b12f0fb8352237525961f14ec933e915848840Mahesh Rajashekhara dev->dbg_size = dev->base_size; 399e8b12f0fb8352237525961f14ec933e915848840Mahesh Rajashekhara 40028713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp aac_adapter_enable_int(dev); 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Tell the adapter that all is configure, and it can start 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * accepting requests 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aac_sa_start_adapter(dev); 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror_irq: 41028713324a0f3c055186ecec27239673c36ba1de5Mark Haverkamp aac_sa_disable_interrupt(dev); 4118ef2224707996aede1808f40116cd467b7c8d549Salyzyn, Mark free_irq(dev->pdev->irq, (void *)dev); 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror_iounmap: 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 418