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![Tim Schmielau](/assets/img/avatar_default.png)
After Al Viro (finally) succeeded in removing the sched.h #include in module.h recently, it makes sense again to remove other superfluous sched.h includes. There are quite a lot of files which include it but don't actually need anything defined in there. Presumably these includes were once needed for macros that used to live in sched.h, but moved to other header files in the course of cleaning it up. To ease the pain, this time I did not fiddle with any header files and only removed #includes from .c-files, which tend to cause less trouble. Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha, arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig, allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all configs in arch/arm/configs on arm. I also checked that no new warnings were introduced by the patch (actually, some warnings are removed that were emitted by unnecessarily included header files). Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
584 lines
13 KiB
C
584 lines
13 KiB
C
/*
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* Sun3 SCSI stuff by Erik Verbruggen (erik@bigmama.xtdnet.nl)
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*
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* Sun3 DMA routines added by Sam Creasey (sammy@sammy.net)
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*
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* VME support added by Sam Creasey
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*
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* Adapted from sun3_scsi.c -- see there for other headers
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*
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* TODO: modify this driver to support multiple Sun3 SCSI VME boards
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*
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*/
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#define AUTOSENSE
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#include <linux/types.h>
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#include <linux/stddef.h>
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#include <linux/ctype.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/signal.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include <asm/sun3ints.h>
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#include <asm/dvma.h>
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#include <asm/idprom.h>
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#include <asm/machines.h>
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#define SUN3_SCSI_VME
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#undef SUN3_SCSI_DEBUG
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/* dma on! */
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#define REAL_DMA
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#include "scsi.h"
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#include "initio.h"
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#include <scsi/scsi_host.h>
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#include "sun3_scsi.h"
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extern int sun3_map_test(unsigned long, char *);
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#define USE_WRAPPER
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/*#define RESET_BOOT */
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#define DRIVER_SETUP
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#define NDEBUG 0
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/*
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* BUG can be used to trigger a strange code-size related hang on 2.1 kernels
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*/
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#ifdef BUG
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#undef RESET_BOOT
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#undef DRIVER_SETUP
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#endif
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/* #define SUPPORT_TAGS */
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//#define ENABLE_IRQ() enable_irq( SUN3_VEC_VMESCSI0 );
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#define ENABLE_IRQ()
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static irqreturn_t scsi_sun3_intr(int irq, void *dummy);
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static inline unsigned char sun3scsi_read(int reg);
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static inline void sun3scsi_write(int reg, int value);
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static int setup_can_queue = -1;
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module_param(setup_can_queue, int, 0);
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static int setup_cmd_per_lun = -1;
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module_param(setup_cmd_per_lun, int, 0);
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static int setup_sg_tablesize = -1;
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module_param(setup_sg_tablesize, int, 0);
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#ifdef SUPPORT_TAGS
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static int setup_use_tagged_queuing = -1;
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module_param(setup_use_tagged_queuing, int, 0);
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#endif
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static int setup_hostid = -1;
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module_param(setup_hostid, int, 0);
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static struct scsi_cmnd *sun3_dma_setup_done = NULL;
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#define AFTER_RESET_DELAY (HZ/2)
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/* ms to wait after hitting dma regs */
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#define SUN3_DMA_DELAY 10
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/* dvma buffer to allocate -- 32k should hopefully be more than sufficient */
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#define SUN3_DVMA_BUFSIZE 0xe000
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/* minimum number of bytes to do dma on */
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#define SUN3_DMA_MINSIZE 128
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static volatile unsigned char *sun3_scsi_regp;
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static volatile struct sun3_dma_regs *dregs;
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#ifdef OLDDMA
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static unsigned char *dmabuf = NULL; /* dma memory buffer */
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#endif
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static unsigned char *sun3_dma_orig_addr = NULL;
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static unsigned long sun3_dma_orig_count = 0;
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static int sun3_dma_active = 0;
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static unsigned long last_residual = 0;
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/*
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* NCR 5380 register access functions
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*/
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static inline unsigned char sun3scsi_read(int reg)
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{
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return( sun3_scsi_regp[reg] );
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}
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static inline void sun3scsi_write(int reg, int value)
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{
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sun3_scsi_regp[reg] = value;
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}
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/*
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* XXX: status debug
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*/
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static struct Scsi_Host *default_instance;
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/*
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* Function : int sun3scsi_detect(struct scsi_host_template * tpnt)
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*
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* Purpose : initializes mac NCR5380 driver based on the
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* command line / compile time port and irq definitions.
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*
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* Inputs : tpnt - template for this SCSI adapter.
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*
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* Returns : 1 if a host adapter was found, 0 if not.
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*
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*/
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static int sun3scsi_detect(struct scsi_host_template * tpnt)
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{
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unsigned long ioaddr, irq = 0;
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static int called = 0;
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struct Scsi_Host *instance;
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int i;
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unsigned long addrs[3] = { IOBASE_SUN3_VMESCSI,
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IOBASE_SUN3_VMESCSI + 0x4000,
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0 };
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unsigned long vecs[3] = { SUN3_VEC_VMESCSI0,
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SUN3_VEC_VMESCSI1,
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0 };
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/* check that this machine has an onboard 5380 */
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switch(idprom->id_machtype) {
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case SM_SUN3|SM_3_160:
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case SM_SUN3|SM_3_260:
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break;
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default:
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return 0;
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}
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if(called)
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return 0;
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tpnt->proc_name = "Sun3 5380 VME SCSI";
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/* setup variables */
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tpnt->can_queue =
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(setup_can_queue > 0) ? setup_can_queue : CAN_QUEUE;
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tpnt->cmd_per_lun =
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(setup_cmd_per_lun > 0) ? setup_cmd_per_lun : CMD_PER_LUN;
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tpnt->sg_tablesize =
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(setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_TABLESIZE;
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if (setup_hostid >= 0)
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tpnt->this_id = setup_hostid;
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else {
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/* use 7 as default */
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tpnt->this_id = 7;
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}
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ioaddr = 0;
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for(i = 0; addrs[i] != 0; i++) {
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unsigned char x;
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ioaddr = (unsigned long)sun3_ioremap(addrs[i], PAGE_SIZE,
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SUN3_PAGE_TYPE_VME16);
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irq = vecs[i];
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sun3_scsi_regp = (unsigned char *)ioaddr;
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dregs = (struct sun3_dma_regs *)(((unsigned char *)ioaddr) + 8);
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if(sun3_map_test((unsigned long)dregs, &x)) {
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unsigned short oldcsr;
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oldcsr = dregs->csr;
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dregs->csr = 0;
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udelay(SUN3_DMA_DELAY);
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if(dregs->csr == 0x1400)
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break;
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dregs->csr = oldcsr;
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}
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iounmap((void *)ioaddr);
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ioaddr = 0;
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}
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if(!ioaddr)
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return 0;
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#ifdef SUPPORT_TAGS
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if (setup_use_tagged_queuing < 0)
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setup_use_tagged_queuing = USE_TAGGED_QUEUING;
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#endif
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instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
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if(instance == NULL)
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return 0;
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default_instance = instance;
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instance->io_port = (unsigned long) ioaddr;
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instance->irq = irq;
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NCR5380_init(instance, 0);
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instance->n_io_port = 32;
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((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0;
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if (request_irq(instance->irq, scsi_sun3_intr,
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0, "Sun3SCSI-5380VME", NULL)) {
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#ifndef REAL_DMA
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printk("scsi%d: IRQ%d not free, interrupts disabled\n",
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instance->host_no, instance->irq);
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instance->irq = SCSI_IRQ_NONE;
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#else
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printk("scsi%d: IRQ%d not free, bailing out\n",
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instance->host_no, instance->irq);
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return 0;
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#endif
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}
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printk("scsi%d: Sun3 5380 VME at port %lX irq", instance->host_no, instance->io_port);
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if (instance->irq == SCSI_IRQ_NONE)
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printk ("s disabled");
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else
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printk (" %d", instance->irq);
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printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
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instance->can_queue, instance->cmd_per_lun,
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SUN3SCSI_PUBLIC_RELEASE);
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printk("\nscsi%d:", instance->host_no);
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NCR5380_print_options(instance);
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printk("\n");
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dregs->csr = 0;
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udelay(SUN3_DMA_DELAY);
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dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR;
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udelay(SUN3_DMA_DELAY);
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dregs->fifo_count = 0;
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dregs->fifo_count_hi = 0;
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dregs->dma_addr_hi = 0;
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dregs->dma_addr_lo = 0;
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dregs->dma_count_hi = 0;
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dregs->dma_count_lo = 0;
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dregs->ivect = VME_DATA24 | (instance->irq & 0xff);
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called = 1;
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#ifdef RESET_BOOT
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sun3_scsi_reset_boot(instance);
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#endif
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return 1;
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}
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int sun3scsi_release (struct Scsi_Host *shpnt)
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{
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if (shpnt->irq != SCSI_IRQ_NONE)
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free_irq (shpnt->irq, NULL);
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iounmap((void *)sun3_scsi_regp);
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return 0;
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}
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#ifdef RESET_BOOT
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/*
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* Our 'bus reset on boot' function
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*/
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static void sun3_scsi_reset_boot(struct Scsi_Host *instance)
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{
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unsigned long end;
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NCR5380_local_declare();
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NCR5380_setup(instance);
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/*
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* Do a SCSI reset to clean up the bus during initialization. No
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* messing with the queues, interrupts, or locks necessary here.
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*/
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printk( "Sun3 SCSI: resetting the SCSI bus..." );
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/* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */
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// sun3_disable_irq( IRQ_SUN3_SCSI );
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/* get in phase */
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NCR5380_write( TARGET_COMMAND_REG,
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PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) ));
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/* assert RST */
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NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST );
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/* The min. reset hold time is 25us, so 40us should be enough */
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udelay( 50 );
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/* reset RST and interrupt */
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NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE );
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NCR5380_read( RESET_PARITY_INTERRUPT_REG );
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for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); )
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barrier();
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/* switch on SCSI IRQ again */
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// sun3_enable_irq( IRQ_SUN3_SCSI );
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printk( " done\n" );
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}
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#endif
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static const char * sun3scsi_info (struct Scsi_Host *spnt) {
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return "";
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}
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// safe bits for the CSR
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#define CSR_GOOD 0x060f
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static irqreturn_t scsi_sun3_intr(int irq, void *dummy)
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{
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unsigned short csr = dregs->csr;
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int handled = 0;
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dregs->csr &= ~CSR_DMA_ENABLE;
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#ifdef SUN3_SCSI_DEBUG
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printk("scsi_intr csr %x\n", csr);
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#endif
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if(csr & ~CSR_GOOD) {
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if(csr & CSR_DMA_BUSERR) {
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printk("scsi%d: bus error in dma\n", default_instance->host_no);
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#ifdef SUN3_SCSI_DEBUG
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printk("scsi: residual %x count %x addr %p dmaaddr %x\n",
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dregs->fifo_count,
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dregs->dma_count_lo | (dregs->dma_count_hi << 16),
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sun3_dma_orig_addr,
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dregs->dma_addr_lo | (dregs->dma_addr_hi << 16));
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#endif
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}
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if(csr & CSR_DMA_CONFLICT) {
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printk("scsi%d: dma conflict\n", default_instance->host_no);
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}
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handled = 1;
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}
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if(csr & (CSR_SDB_INT | CSR_DMA_INT)) {
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NCR5380_intr(irq, dummy);
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handled = 1;
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}
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return IRQ_RETVAL(handled);
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}
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/*
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* Debug stuff - to be called on NMI, or sysrq key. Use at your own risk;
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* reentering NCR5380_print_status seems to have ugly side effects
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*/
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/* this doesn't seem to get used at all -- sam */
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#if 0
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void sun3_sun3_debug (void)
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{
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unsigned long flags;
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NCR5380_local_declare();
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if (default_instance) {
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local_irq_save(flags);
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NCR5380_print_status(default_instance);
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local_irq_restore(flags);
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}
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}
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#endif
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/* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */
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static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)
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{
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void *addr;
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if(sun3_dma_orig_addr != NULL)
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dvma_unmap(sun3_dma_orig_addr);
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// addr = sun3_dvma_page((unsigned long)data, (unsigned long)dmabuf);
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addr = (void *)dvma_map_vme((unsigned long) data, count);
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sun3_dma_orig_addr = addr;
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sun3_dma_orig_count = count;
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#ifdef SUN3_SCSI_DEBUG
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printk("scsi: dma_setup addr %p count %x\n", addr, count);
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#endif
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// dregs->fifo_count = 0;
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#if 0
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/* reset fifo */
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dregs->csr &= ~CSR_FIFO;
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dregs->csr |= CSR_FIFO;
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#endif
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/* set direction */
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if(write_flag)
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dregs->csr |= CSR_SEND;
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else
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dregs->csr &= ~CSR_SEND;
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/* reset fifo */
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// dregs->csr &= ~CSR_FIFO;
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// dregs->csr |= CSR_FIFO;
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dregs->csr |= CSR_PACK_ENABLE;
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dregs->dma_addr_hi = ((unsigned long)addr >> 16);
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dregs->dma_addr_lo = ((unsigned long)addr & 0xffff);
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dregs->dma_count_hi = 0;
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dregs->dma_count_lo = 0;
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dregs->fifo_count_hi = 0;
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dregs->fifo_count = 0;
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#ifdef SUN3_SCSI_DEBUG
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printk("scsi: dma_setup done csr %x\n", dregs->csr);
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#endif
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return count;
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}
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static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)
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{
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return last_residual;
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}
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static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted,
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struct scsi_cmnd *cmd,
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int write_flag)
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{
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if(blk_fs_request(cmd->request))
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return wanted;
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else
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return 0;
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}
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static int sun3scsi_dma_start(unsigned long count, char *data)
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{
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unsigned short csr;
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csr = dregs->csr;
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#ifdef SUN3_SCSI_DEBUG
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printk("scsi: dma_start data %p count %x csr %x fifo %x\n", data, count, csr, dregs->fifo_count);
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#endif
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dregs->dma_count_hi = (sun3_dma_orig_count >> 16);
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dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff);
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dregs->fifo_count_hi = (sun3_dma_orig_count >> 16);
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dregs->fifo_count = (sun3_dma_orig_count & 0xffff);
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// if(!(csr & CSR_DMA_ENABLE))
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// dregs->csr |= CSR_DMA_ENABLE;
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return 0;
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}
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/* clean up after our dma is done */
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static int sun3scsi_dma_finish(int write_flag)
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{
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unsigned short fifo;
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int ret = 0;
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sun3_dma_active = 0;
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dregs->csr &= ~CSR_DMA_ENABLE;
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fifo = dregs->fifo_count;
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if(write_flag) {
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if((fifo > 0) && (fifo < sun3_dma_orig_count))
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fifo++;
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}
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last_residual = fifo;
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#ifdef SUN3_SCSI_DEBUG
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printk("scsi: residual %x total %x\n", fifo, sun3_dma_orig_count);
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#endif
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|
/* empty bytes from the fifo which didn't make it */
|
|
if((!write_flag) && (dregs->csr & CSR_LEFT)) {
|
|
unsigned char *vaddr;
|
|
|
|
#ifdef SUN3_SCSI_DEBUG
|
|
printk("scsi: got left over bytes\n");
|
|
#endif
|
|
|
|
vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);
|
|
|
|
vaddr += (sun3_dma_orig_count - fifo);
|
|
vaddr--;
|
|
|
|
switch(dregs->csr & CSR_LEFT) {
|
|
case CSR_LEFT_3:
|
|
*vaddr = (dregs->bpack_lo & 0xff00) >> 8;
|
|
vaddr--;
|
|
|
|
case CSR_LEFT_2:
|
|
*vaddr = (dregs->bpack_hi & 0x00ff);
|
|
vaddr--;
|
|
|
|
case CSR_LEFT_1:
|
|
*vaddr = (dregs->bpack_hi & 0xff00) >> 8;
|
|
break;
|
|
}
|
|
|
|
|
|
}
|
|
|
|
dvma_unmap(sun3_dma_orig_addr);
|
|
sun3_dma_orig_addr = NULL;
|
|
|
|
dregs->dma_addr_hi = 0;
|
|
dregs->dma_addr_lo = 0;
|
|
dregs->dma_count_hi = 0;
|
|
dregs->dma_count_lo = 0;
|
|
|
|
dregs->fifo_count = 0;
|
|
dregs->fifo_count_hi = 0;
|
|
|
|
dregs->csr &= ~CSR_SEND;
|
|
|
|
// dregs->csr |= CSR_DMA_ENABLE;
|
|
|
|
#if 0
|
|
/* reset fifo */
|
|
dregs->csr &= ~CSR_FIFO;
|
|
dregs->csr |= CSR_FIFO;
|
|
#endif
|
|
sun3_dma_setup_done = NULL;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
#include "sun3_NCR5380.c"
|
|
|
|
static struct scsi_host_template driver_template = {
|
|
.name = SUN3_SCSI_NAME,
|
|
.detect = sun3scsi_detect,
|
|
.release = sun3scsi_release,
|
|
.info = sun3scsi_info,
|
|
.queuecommand = sun3scsi_queue_command,
|
|
.eh_abort_handler = sun3scsi_abort,
|
|
.eh_bus_reset_handler = sun3scsi_bus_reset,
|
|
.can_queue = CAN_QUEUE,
|
|
.this_id = 7,
|
|
.sg_tablesize = SG_TABLESIZE,
|
|
.cmd_per_lun = CMD_PER_LUN,
|
|
.use_clustering = DISABLE_CLUSTERING
|
|
};
|
|
|
|
|
|
#include "scsi_module.c"
|
|
|