mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Mike Rapoport](/assets/img/avatar_default.png)
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>
156 lines
3.7 KiB
C
156 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);
|