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| Started by | MaJun <majun258@huawei.com> |
|---|---|
| First post | 2015-12-21 04:20 +0100 |
| Last post | 2015-12-22 03:50 +0100 |
| Articles | 3 — 3 participants |
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[PATCH] IRQ/Platform-MSI:Increase the maximum MSIs the MSI framework can support. MaJun <majun258@huawei.com> - 2015-12-21 04:20 +0100
Re: [PATCH] IRQ/Platform-MSI:Increase the maximum MSIs the MSI framework can support. Marc Zyngier <marc.zyngier@arm.com> - 2015-12-21 11:40 +0100
Re: [PATCH] IRQ/Platform-MSI:Increase the maximum MSIs the MSI framework can support. "majun (F)" <majun258@huawei.com> - 2015-12-22 03:50 +0100
| From | MaJun <majun258@huawei.com> |
|---|---|
| Date | 2015-12-21 04:20 +0100 |
| Subject | [PATCH] IRQ/Platform-MSI:Increase the maximum MSIs the MSI framework can support. |
| Message-ID | <qHZaW-13Z-17@gated-at.bofh.it> |
From: Ma Jun <majun258@huawei.com> The current MSI framework can only support 256 platform MSIs. But on Hisilicon platform, some network related devices has about 500 wired interrupts. To support these devices, we need a new maximum value more than 256. Signed-off-by: Ma Jun <majun258@huawei.com> --- drivers/base/platform-msi.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c index a203896..9c00d3f 100644 --- a/drivers/base/platform-msi.c +++ b/drivers/base/platform-msi.c @@ -24,7 +24,7 @@ #include <linux/msi.h> #include <linux/slab.h> -#define DEV_ID_SHIFT 24 +#define DEV_ID_SHIFT 22 #define MAX_DEV_MSIS (1 << (32 - DEV_ID_SHIFT)) /* -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Marc Zyngier <marc.zyngier@arm.com> |
|---|---|
| Date | 2015-12-21 11:40 +0100 |
| Subject | Re: [PATCH] IRQ/Platform-MSI:Increase the maximum MSIs the MSI framework can support. |
| Message-ID | <qI62K-5iw-27@gated-at.bofh.it> |
| In reply to | #1295755 |
On Mon, 21 Dec 2015 11:18:25 +0800 MaJun <majun258@huawei.com> wrote: > From: Ma Jun <majun258@huawei.com> > > The current MSI framework can only support 256 platform MSIs. > > But on Hisilicon platform, some network related devices has about 500 > wired interrupts. > > To support these devices, we need a new maximum value more than 256. > > Signed-off-by: Ma Jun <majun258@huawei.com> > --- > drivers/base/platform-msi.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c > index a203896..9c00d3f 100644 > --- a/drivers/base/platform-msi.c > +++ b/drivers/base/platform-msi.c > @@ -24,7 +24,7 @@ > #include <linux/msi.h> > #include <linux/slab.h> > > -#define DEV_ID_SHIFT 24 > +#define DEV_ID_SHIFT 22 > #define MAX_DEV_MSIS (1 << (32 - DEV_ID_SHIFT)) > > /* If we bother doing that, why not directly aligning it with MSI-X and allow up to 2048 interrupts per device? It is only an extra bit, and that still leaves 21 bits worth of device IDs, while still having hwirq as an unsigned long (32bit on 32bit architectures). Thanks, M. -- Without deviation from the norm, progress is not possible. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | "majun (F)" <majun258@huawei.com> |
|---|---|
| Date | 2015-12-22 03:50 +0100 |
| Subject | Re: [PATCH] IRQ/Platform-MSI:Increase the maximum MSIs the MSI framework can support. |
| Message-ID | <qIlbt-6oO-39@gated-at.bofh.it> |
| In reply to | #1295899 |
在 2015/12/21 18:43, Marc Zyngier 写道: > On Mon, 21 Dec 2015 11:18:25 +0800 > MaJun <majun258@huawei.com> wrote: > >> From: Ma Jun <majun258@huawei.com> >> >> The current MSI framework can only support 256 platform MSIs. >> >> But on Hisilicon platform, some network related devices has about 500 >> wired interrupts. >> >> To support these devices, we need a new maximum value more than 256. >> >> Signed-off-by: Ma Jun <majun258@huawei.com> >> --- >> drivers/base/platform-msi.c | 2 +- >> 1 files changed, 1 insertions(+), 1 deletions(-) >> >> diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c >> index a203896..9c00d3f 100644 >> --- a/drivers/base/platform-msi.c >> +++ b/drivers/base/platform-msi.c >> @@ -24,7 +24,7 @@ >> #include <linux/msi.h> >> #include <linux/slab.h> >> >> -#define DEV_ID_SHIFT 24 >> +#define DEV_ID_SHIFT 22 >> #define MAX_DEV_MSIS (1 << (32 - DEV_ID_SHIFT)) >> >> /* > > If we bother doing that, why not directly aligning it with MSI-X and > allow up to 2048 interrupts per device? It is only an extra bit, and > that still leaves 21 bits worth of device IDs, while still having > hwirq as an unsigned long (32bit on 32bit architectures). > Ok, I'll changed this value to 2048 Thanks Ma Jun > Thanks, > > M. > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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