linux/drivers/scsi/mvme147.c
Mike Rapoport e31cf2f4ca mm: don't include asm/pgtable.h if linux/mm.h is already included
Patch series "mm: consolidate definitions of page table accessors", v2.

The low level page table accessors (pXY_index(), pXY_offset()) are
duplicated across all architectures and sometimes more than once.  For
instance, we have 31 definition of pgd_offset() for 25 supported
architectures.

Most of these definitions are actually identical and typically it boils
down to, e.g.

static inline unsigned long pmd_index(unsigned long address)
{
        return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
}

static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
{
        return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
}

These definitions can be shared among 90% of the arches provided
XYZ_SHIFT, PTRS_PER_XYZ and xyz_page_vaddr() are defined.

For architectures that really need a custom version there is always
possibility to override the generic version with the usual ifdefs magic.

These patches introduce include/linux/pgtable.h that replaces
include/asm-generic/pgtable.h and add the definitions of the page table
accessors to the new header.

This patch (of 12):

The linux/mm.h header includes <asm/pgtable.h> to allow inlining of the
functions involving page table manipulations, e.g.  pte_alloc() and
pmd_alloc().  So, there is no point to explicitly include <asm/pgtable.h>
in the files that include <linux/mm.h>.

The include statements in such cases are remove with a simple loop:

	for f in $(git grep -l "include <linux/mm.h>") ; do
		sed -i -e '/include <asm\/pgtable.h>/ d' $f
	done

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-1-rppt@kernel.org
Link: http://lkml.kernel.org/r/20200514170327.31389-2-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-09 09:39:13 -07:00

157 lines
3.7 KiB
C

// SPDX-License-Identifier: GPL-2.0
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <asm/page.h>
#include <asm/mvme147hw.h>
#include <asm/irq.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include "wd33c93.h"
#include "mvme147.h"
static irqreturn_t mvme147_intr(int irq, void *data)
{
struct Scsi_Host *instance = data;
if (irq == MVME147_IRQ_SCSI_PORT)
wd33c93_intr(instance);
else
m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
return IRQ_HANDLED;
}
static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
{
struct Scsi_Host *instance = cmd->device->host;
struct WD33C93_hostdata *hdata = shost_priv(instance);
unsigned char flags = 0x01;
unsigned long addr = virt_to_bus(cmd->SCp.ptr);
/* setup dma direction */
if (!dir_in)
flags |= 0x04;
/* remember direction */
hdata->dma_dir = dir_in;
if (dir_in) {
/* invalidate any cache */
cache_clear(addr, cmd->SCp.this_residual);
} else {
/* push any dirty cache */
cache_push(addr, cmd->SCp.this_residual);
}
/* start DMA */
m147_pcc->dma_bcr = cmd->SCp.this_residual | (1 << 24);
m147_pcc->dma_dadr = addr;
m147_pcc->dma_cntrl = flags;
/* return success */
return 0;
}
static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
int status)
{
m147_pcc->dma_cntrl = 0;
}
static struct scsi_host_template mvme147_host_template = {
.module = THIS_MODULE,
.proc_name = "MVME147",
.name = "MVME147 built-in SCSI",
.queuecommand = wd33c93_queuecommand,
.eh_abort_handler = wd33c93_abort,
.eh_host_reset_handler = wd33c93_host_reset,
.show_info = wd33c93_show_info,
.write_info = wd33c93_write_info,
.can_queue = CAN_QUEUE,
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = CMD_PER_LUN,
};
static struct Scsi_Host *mvme147_shost;
static int __init mvme147_init(void)
{
wd33c93_regs regs;
struct WD33C93_hostdata *hdata;
int error = -ENOMEM;
if (!MACH_IS_MVME147)
return 0;
mvme147_shost = scsi_host_alloc(&mvme147_host_template,
sizeof(struct WD33C93_hostdata));
if (!mvme147_shost)
goto err_out;
mvme147_shost->base = 0xfffe4000;
mvme147_shost->irq = MVME147_IRQ_SCSI_PORT;
regs.SASR = (volatile unsigned char *)0xfffe4000;
regs.SCMD = (volatile unsigned char *)0xfffe4001;
hdata = shost_priv(mvme147_shost);
hdata->no_sync = 0xff;
hdata->fast = 0;
hdata->dma_mode = CTRL_DMA;
wd33c93_init(mvme147_shost, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
error = request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0,
"MVME147 SCSI PORT", mvme147_shost);
if (error)
goto err_unregister;
error = request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0,
"MVME147 SCSI DMA", mvme147_shost);
if (error)
goto err_free_irq;
#if 0 /* Disabled; causes problems booting */
m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
udelay(100);
m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
udelay(2000);
m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
#endif
m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
error = scsi_add_host(mvme147_shost, NULL);
if (error)
goto err_free_irq;
scsi_scan_host(mvme147_shost);
return 0;
err_free_irq:
free_irq(MVME147_IRQ_SCSI_PORT, mvme147_shost);
err_unregister:
scsi_host_put(mvme147_shost);
err_out:
return error;
}
static void __exit mvme147_exit(void)
{
scsi_remove_host(mvme147_shost);
/* XXX Make sure DMA is stopped! */
free_irq(MVME147_IRQ_SCSI_PORT, mvme147_shost);
free_irq(MVME147_IRQ_SCSI_DMA, mvme147_shost);
scsi_host_put(mvme147_shost);
}
module_init(mvme147_init);
module_exit(mvme147_exit);