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The following two header files have the same file name: include/scsi/scsi.h and drivers/scsi/scsi.h. This is confusing. Remove the latter since the following note was added in drivers/scsi/scsi.h in 2004: "NOTE: this file only contains compatibility glue for old drivers. All these wrappers will be removed sooner or later. For new code please use the interfaces declared in the headers in include/scsi/" Link: https://lore.kernel.org/r/20220218195117.25689-7-bvanassche@acm.org Cc: Christoph Hellwig <hch@lst.de> Cc: Ming Lei <ming.lei@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
161 lines
3.9 KiB
C
161 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/blkdev.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <asm/page.h>
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#include <asm/mvme147hw.h>
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#include <asm/irq.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_tcq.h>
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#include "wd33c93.h"
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#include "mvme147.h"
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static irqreturn_t mvme147_intr(int irq, void *data)
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{
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struct Scsi_Host *instance = data;
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if (irq == MVME147_IRQ_SCSI_PORT)
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wd33c93_intr(instance);
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else
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m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
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return IRQ_HANDLED;
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}
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static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
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{
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struct Scsi_Host *instance = cmd->device->host;
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struct WD33C93_hostdata *hdata = shost_priv(instance);
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unsigned char flags = 0x01;
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unsigned long addr = virt_to_bus(cmd->SCp.ptr);
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/* setup dma direction */
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if (!dir_in)
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flags |= 0x04;
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/* remember direction */
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hdata->dma_dir = dir_in;
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if (dir_in) {
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/* invalidate any cache */
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cache_clear(addr, cmd->SCp.this_residual);
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} else {
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/* push any dirty cache */
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cache_push(addr, cmd->SCp.this_residual);
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}
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/* start DMA */
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m147_pcc->dma_bcr = cmd->SCp.this_residual | (1 << 24);
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m147_pcc->dma_dadr = addr;
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m147_pcc->dma_cntrl = flags;
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/* return success */
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return 0;
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}
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static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
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int status)
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{
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m147_pcc->dma_cntrl = 0;
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}
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static struct scsi_host_template mvme147_host_template = {
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.module = THIS_MODULE,
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.proc_name = "MVME147",
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.name = "MVME147 built-in SCSI",
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.queuecommand = wd33c93_queuecommand,
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.eh_abort_handler = wd33c93_abort,
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.eh_host_reset_handler = wd33c93_host_reset,
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.show_info = wd33c93_show_info,
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.write_info = wd33c93_write_info,
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.can_queue = CAN_QUEUE,
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.this_id = 7,
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.sg_tablesize = SG_ALL,
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.cmd_per_lun = CMD_PER_LUN,
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};
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static struct Scsi_Host *mvme147_shost;
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static int __init mvme147_init(void)
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{
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wd33c93_regs regs;
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struct WD33C93_hostdata *hdata;
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int error = -ENOMEM;
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if (!MACH_IS_MVME147)
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return 0;
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mvme147_shost = scsi_host_alloc(&mvme147_host_template,
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sizeof(struct WD33C93_hostdata));
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if (!mvme147_shost)
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goto err_out;
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mvme147_shost->base = 0xfffe4000;
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mvme147_shost->irq = MVME147_IRQ_SCSI_PORT;
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regs.SASR = (volatile unsigned char *)0xfffe4000;
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regs.SCMD = (volatile unsigned char *)0xfffe4001;
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hdata = shost_priv(mvme147_shost);
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hdata->no_sync = 0xff;
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hdata->fast = 0;
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hdata->dma_mode = CTRL_DMA;
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wd33c93_init(mvme147_shost, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
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error = request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0,
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"MVME147 SCSI PORT", mvme147_shost);
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if (error)
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goto err_unregister;
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error = request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0,
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"MVME147 SCSI DMA", mvme147_shost);
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if (error)
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goto err_free_irq;
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#if 0 /* Disabled; causes problems booting */
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m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
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udelay(100);
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m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
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udelay(2000);
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m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
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#endif
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m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
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m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
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m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
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error = scsi_add_host(mvme147_shost, NULL);
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if (error)
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goto err_free_irq;
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scsi_scan_host(mvme147_shost);
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return 0;
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err_free_irq:
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free_irq(MVME147_IRQ_SCSI_PORT, mvme147_shost);
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err_unregister:
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scsi_host_put(mvme147_shost);
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err_out:
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return error;
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}
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static void __exit mvme147_exit(void)
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{
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scsi_remove_host(mvme147_shost);
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/* XXX Make sure DMA is stopped! */
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free_irq(MVME147_IRQ_SCSI_PORT, mvme147_shost);
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free_irq(MVME147_IRQ_SCSI_DMA, mvme147_shost);
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scsi_host_put(mvme147_shost);
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}
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module_init(mvme147_init);
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module_exit(mvme147_exit);
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