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scsi: cxlflash: Access interrupt trigger page from xive directly

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xive is already mapping the trigger page in kernel space and it can be
accessed through standard APIs, so let's reuse it and simplify the code.

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Matthew R. Ochs <mrochs@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200403153838.29224-2-fbarrat@linux.ibm.com
This commit is contained in:
Frederic Barrat 2020-04-03 17:38:35 +02:00 committed by Michael Ellerman
parent d3e669f31e
commit 1e89da5ef9
2 changed files with 8 additions and 11 deletions
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18
drivers/scsi/cxlflash/ocxl_hw.c
View File

@ -15,7 +15,8 @@
#include <linux/pseudo_fs.h>
#include <linux/poll.h>
#include <linux/sched/signal.h>
#include <linux/interrupt.h>
#include <asm/xive.h>
#include <misc/ocxl.h>
#include <uapi/misc/cxl.h>
@ -180,7 +181,7 @@ static int afu_map_irq(u64 flags, struct ocxlflash_context *ctx, int num,
struct ocxl_hw_afu *afu = ctx->hw_afu;
struct device *dev = afu->dev;
struct ocxlflash_irqs *irq;
void __iomem *vtrig;
struct xive_irq_data *xd;
u32 virq;
int rc = 0;
@ -204,15 +205,15 @@ static int afu_map_irq(u64 flags, struct ocxlflash_context *ctx, int num,
goto err1;
}
vtrig = ioremap(irq->ptrig, PAGE_SIZE);
if (unlikely(!vtrig)) {
dev_err(dev, "%s: Trigger page mapping failed\n", __func__);
rc = -ENOMEM;
xd = irq_get_handler_data(virq);
if (unlikely(!xd)) {
dev_err(dev, "%s: Can't get interrupt data\n", __func__);
rc = -ENXIO;
goto err2;
}
irq->virq = virq;
irq->vtrig = vtrig;
irq->vtrig = xd->trig_mmio;
out:
return rc;
err2:
@ -259,8 +260,6 @@ static void afu_unmap_irq(u64 flags, struct ocxlflash_context *ctx, int num,
}
irq = &ctx->irqs[num];
if (irq->vtrig)
iounmap(irq->vtrig);
if (irq_find_mapping(NULL, irq->hwirq)) {
free_irq(irq->virq, cookie);
@ -648,7 +647,6 @@ static int alloc_afu_irqs(struct ocxlflash_context *ctx, int num)
}
irqs[i].hwirq = hwirq;
irqs[i].ptrig = addr;
}
ctx->irqs = irqs;

1
drivers/scsi/cxlflash/ocxl_hw.h
View File

@ -13,7 +13,6 @@
struct ocxlflash_irqs {
int hwirq;
u32 virq;
u64 ptrig;
void __iomem *vtrig;
};