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Date: Thu, 30 Jun 2011 22:27:36 +0800
From: yxlraid@...il.com
To: JBottomley@...allels.com
Cc: James.Bottomley@...e.de, jack_wang@...sh.com,
lucas.demarchi@...fusion.mobi, maciej.trela@...el.com,
dan.j.williams@...el.com, linux-scsi@...r.kernel.org,
linux-kernel@...r.kernel.org, yuxiangl@...vell.com,
jfeng@...vell.com
Subject: [PATCH 9/9] [SCSI] mvsas: Add support for interrupt tasklet
From: Xiangliang Yu <yuxiangl@...vell.com>
-- Add support for interrupt tasklet, which will improve performance.
-- Correct spelling of "20011"
Signed-off-by: Xiangliang Yu <yuxiangl@...vell.com>
---
drivers/scsi/mvsas/Kconfig | 9 ++++++++-
drivers/scsi/mvsas/Makefile | 1 +
drivers/scsi/mvsas/mv_64xx.c | 6 ++----
drivers/scsi/mvsas/mv_94xx.c | 5 +----
drivers/scsi/mvsas/mv_init.c | 32 ++++++++++++++++++++------------
drivers/scsi/mvsas/mv_sas.h | 1 +
6 files changed, 33 insertions(+), 21 deletions(-)
diff --git a/drivers/scsi/mvsas/Kconfig b/drivers/scsi/mvsas/Kconfig
index c82b012..78f7e20 100644
--- a/drivers/scsi/mvsas/Kconfig
+++ b/drivers/scsi/mvsas/Kconfig
@@ -3,7 +3,7 @@
#
# Copyright 2007 Red Hat, Inc.
# Copyright 2008 Marvell. <kewei@...vell.com>
-# Copyright 2009-20011 Marvell. <yuxiangl@...vell.com>
+# Copyright 2009-2011 Marvell. <yuxiangl@...vell.com>
#
# This file is licensed under GPLv2.
#
@@ -41,3 +41,10 @@ config SCSI_MVSAS_DEBUG
help
Compiles the 88SE64XX/88SE94XX driver in debug mode. In debug mode,
the driver prints some messages to the console.
+config SCSI_MVSAS_TASKLET
+ bool "Support for interrupt tasklet"
+ default n
+ depends on SCSI_MVSAS
+ help
+ Compiles the 88SE64xx/88SE94xx driver in interrupt tasklet mode.In this mode,
+ the interrupt will schedule a tasklet.
diff --git a/drivers/scsi/mvsas/Makefile b/drivers/scsi/mvsas/Makefile
index 87b231a..40aae8a 100644
--- a/drivers/scsi/mvsas/Makefile
+++ b/drivers/scsi/mvsas/Makefile
@@ -23,6 +23,7 @@
# USA
ccflags-$(CONFIG_SCSI_MVSAS_DEBUG) := -DMV_DEBUG
+ccflags-$(CONFIG_SCSI_MVSAS_TASKLET) := -DMVS_USE_TASKLET
obj-$(CONFIG_SCSI_MVSAS) += mvsas.o
mvsas-y += mv_init.o \
diff --git a/drivers/scsi/mvsas/mv_64xx.c b/drivers/scsi/mvsas/mv_64xx.c
index dec5f96..8ba4722 100644
--- a/drivers/scsi/mvsas/mv_64xx.c
+++ b/drivers/scsi/mvsas/mv_64xx.c
@@ -471,13 +471,11 @@ static irqreturn_t mvs_64xx_isr(struct mvs_info *mvi, int irq, u32 stat)
/* clear CMD_CMPLT ASAP */
mw32_f(MVS_INT_STAT, CINT_DONE);
-#ifndef MVS_USE_TASKLET
+
spin_lock(&mvi->lock);
-#endif
mvs_int_full(mvi);
-#ifndef MVS_USE_TASKLET
spin_unlock(&mvi->lock);
-#endif
+
return IRQ_HANDLED;
}
diff --git a/drivers/scsi/mvsas/mv_94xx.c b/drivers/scsi/mvsas/mv_94xx.c
index f4a995c..3501291 100644
--- a/drivers/scsi/mvsas/mv_94xx.c
+++ b/drivers/scsi/mvsas/mv_94xx.c
@@ -579,13 +579,10 @@ static irqreturn_t mvs_94xx_isr(struct mvs_info *mvi, int irq, u32 stat)
if (((stat & IRQ_SAS_A) && mvi->id == 0) ||
((stat & IRQ_SAS_B) && mvi->id == 1)) {
mw32_f(MVS_INT_STAT, CINT_DONE);
- #ifndef MVS_USE_TASKLET
+
spin_lock(&mvi->lock);
- #endif
mvs_int_full(mvi);
- #ifndef MVS_USE_TASKLET
spin_unlock(&mvi->lock);
- #endif
}
return IRQ_HANDLED;
}
diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c
index cf4aaa9..77dea68 100644
--- a/drivers/scsi/mvsas/mv_init.c
+++ b/drivers/scsi/mvsas/mv_init.c
@@ -171,10 +171,8 @@ static void mvs_free(struct mvs_info *mvi)
}
#ifdef MVS_USE_TASKLET
-struct tasklet_struct mv_tasklet;
static void mvs_tasklet(unsigned long opaque)
{
- unsigned long flags;
u32 stat;
u16 core_nr, i = 0;
@@ -187,12 +185,16 @@ static void mvs_tasklet(unsigned long opaque)
if (unlikely(!mvi))
BUG_ON(1);
+ stat = MVS_CHIP_DISP->isr_status(mvi, mvi->pdev->irq);
+ if (!stat)
+ goto out;
+
for (i = 0; i < core_nr; i++) {
mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[i];
- stat = MVS_CHIP_DISP->isr_status(mvi, mvi->irq);
- if (stat)
- MVS_CHIP_DISP->isr(mvi, mvi->irq, stat);
+ MVS_CHIP_DISP->isr(mvi, mvi->pdev->irq, stat);
}
+out:
+ MVS_CHIP_DISP->interrupt_enable(mvi);
}
#endif
@@ -209,13 +211,20 @@ static irqreturn_t mvs_interrupt(int irq, void *opaque)
if (unlikely(!mvi))
return IRQ_NONE;
+#ifdef MVS_USE_TASKLET
+ MVS_CHIP_DISP->interrupt_disable(mvi);
+#endif
stat = MVS_CHIP_DISP->isr_status(mvi, irq);
- if (!stat)
+ if (!stat) {
+ #ifdef MVS_USE_TASKLET
+ MVS_CHIP_DISP->interrupt_enable(mvi);
+ #endif
return IRQ_NONE;
+ }
#ifdef MVS_USE_TASKLET
- tasklet_schedule(&mv_tasklet);
+ tasklet_schedule(&((struct mvs_prv_info *)sha->lldd_ha)->mv_tasklet);
#else
for (i = 0; i < core_nr; i++) {
mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[i];
@@ -388,9 +397,6 @@ static struct mvs_info *__devinit mvs_pci_alloc(struct pci_dev *pdev,
mvi->id = id;
mvi->sas = sha;
mvi->shost = shost;
-#ifdef MVS_USE_TASKLET
- tasklet_init(&mv_tasklet, mvs_tasklet, (unsigned long)sha);
-#endif
mvi->tags = kzalloc(MVS_CHIP_SLOT_SZ>>3, GFP_KERNEL);
if (!mvi->tags)
@@ -535,6 +541,7 @@ static int __devinit mvs_pci_init(struct pci_dev *pdev,
{
unsigned int rc, nhost = 0;
struct mvs_info *mvi;
+ struct mvs_prv_info *mpi;
irq_handler_t irq_handler = mvs_interrupt;
struct Scsi_Host *shost = NULL;
const struct mvs_chip_info *chip;
@@ -599,8 +606,9 @@ static int __devinit mvs_pci_init(struct pci_dev *pdev,
}
nhost++;
} while (nhost < chip->n_host);
+ mpi = (struct mvs_prv_info *)(SHOST_TO_SAS_HA(shost)->lldd_ha);
#ifdef MVS_USE_TASKLET
- tasklet_init(&mv_tasklet, mvs_tasklet,
+ tasklet_init(&(mpi->mv_tasklet), mvs_tasklet,
(unsigned long)SHOST_TO_SAS_HA(shost));
#endif
@@ -646,7 +654,7 @@ static void __devexit mvs_pci_remove(struct pci_dev *pdev)
mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[0];
#ifdef MVS_USE_TASKLET
- tasklet_kill(&mv_tasklet);
+ tasklet_kill(&((struct mvs_prv_info *)sha->lldd_ha)->mv_tasklet);
#endif
pci_set_drvdata(pdev, NULL);
diff --git a/drivers/scsi/mvsas/mv_sas.h b/drivers/scsi/mvsas/mv_sas.h
index 56ece2e..37d23a3 100644
--- a/drivers/scsi/mvsas/mv_sas.h
+++ b/drivers/scsi/mvsas/mv_sas.h
@@ -420,6 +420,7 @@ struct mvs_prv_info{
u8 scan_finished;
u8 reserve;
struct mvs_info *mvi[2];
+ struct tasklet_struct mv_tasklet;
};
struct mvs_wq {
--
1.7.4.4
--
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