From: Arnd Bergmann <arnd@arndb.de>
To: linux-arm-kernel@lists.infradead.org
Cc: thomas.lendacky@amd.com, msalter@redhat.com,
herbert@gondor.apana.org.au, al.stone@linaro.org,
rjw@rjwysocki.net, catalin.marinas@arm.com,
linaro-acpi@lists.linaro.org, will.deacon@arm.com,
linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org,
linux-acpi@vger.kernel.org, leo.duran@amd.com,
hanjun.guo@linaro.org,
Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>,
netdev@vger.kernel.org, grant.likely@linaro.org,
davem@davemloft.net, lenb@kernel.org
Subject: Re: [V2 PATCH 2/5] arm64 : Introduce support for ACPI _CCA object
Date: Tue, 05 May 2015 17:44:49 +0200 [thread overview]
Message-ID: <5126612.k0u2CL2zi5@wuerfel> (raw)
In-Reply-To: <1430838729-21572-3-git-send-email-Suravee.Suthikulpanit@amd.com>
On Tuesday 05 May 2015 10:12:06 Suravee Suthikulpanit wrote:
> +struct dma_map_ops dummy_dma_ops = {
> + .alloc = __dummy_alloc,
> + .free = __dummy_free,
> + .mmap = __dummy_mmap,
> + .map_page = __dummy_map_page,
> + .unmap_page = __dummy_unmap_page,
> + .map_sg = __dummy_map_sg,
> + .unmap_sg = __dummy_unmap_sg,
> + .sync_single_for_cpu = __dummy_sync_single_for_cpu,
> + .sync_single_for_device = __dummy_sync_single_for_device,
> + .sync_sg_for_cpu = __dummy_sync_sg_for_cpu,
> + .sync_sg_for_device = __dummy_sync_sg_for_device,
> + .mapping_error = __dummy_mapping_error,
> + .dma_supported = __dummy_dma_supported,
> +};
> +EXPORT_SYMBOL(dummy_dma_ops);
> +
>
This will clearly work, but I think it's easier to just leave
the dma_mask pointer as NULL when creating the platform device,
which should let the normal dma ops fail all the callbacks.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [V2 PATCH 2/5] arm64 : Introduce support for ACPI _CCA object
Date: Tue, 05 May 2015 17:44:49 +0200 [thread overview]
Message-ID: <5126612.k0u2CL2zi5@wuerfel> (raw)
In-Reply-To: <1430838729-21572-3-git-send-email-Suravee.Suthikulpanit@amd.com>
On Tuesday 05 May 2015 10:12:06 Suravee Suthikulpanit wrote:
> +struct dma_map_ops dummy_dma_ops = {
> + .alloc = __dummy_alloc,
> + .free = __dummy_free,
> + .mmap = __dummy_mmap,
> + .map_page = __dummy_map_page,
> + .unmap_page = __dummy_unmap_page,
> + .map_sg = __dummy_map_sg,
> + .unmap_sg = __dummy_unmap_sg,
> + .sync_single_for_cpu = __dummy_sync_single_for_cpu,
> + .sync_single_for_device = __dummy_sync_single_for_device,
> + .sync_sg_for_cpu = __dummy_sync_sg_for_cpu,
> + .sync_sg_for_device = __dummy_sync_sg_for_device,
> + .mapping_error = __dummy_mapping_error,
> + .dma_supported = __dummy_dma_supported,
> +};
> +EXPORT_SYMBOL(dummy_dma_ops);
> +
>
This will clearly work, but I think it's easier to just leave
the dma_mask pointer as NULL when creating the platform device,
which should let the normal dma ops fail all the callbacks.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: linux-arm-kernel@lists.infradead.org
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>,
rjw@rjwysocki.net, lenb@kernel.org, catalin.marinas@arm.com,
will.deacon@arm.com, thomas.lendacky@amd.com,
herbert@gondor.apana.org.au, davem@davemloft.net,
al.stone@linaro.org, linaro-acpi@lists.linaro.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-acpi@vger.kernel.org, leo.duran@amd.com,
hanjun.guo@linaro.org, msalter@redhat.com,
grant.likely@linaro.org, linux-crypto@vger.kernel.org
Subject: Re: [V2 PATCH 2/5] arm64 : Introduce support for ACPI _CCA object
Date: Tue, 05 May 2015 17:44:49 +0200 [thread overview]
Message-ID: <5126612.k0u2CL2zi5@wuerfel> (raw)
In-Reply-To: <1430838729-21572-3-git-send-email-Suravee.Suthikulpanit@amd.com>
On Tuesday 05 May 2015 10:12:06 Suravee Suthikulpanit wrote:
> +struct dma_map_ops dummy_dma_ops = {
> + .alloc = __dummy_alloc,
> + .free = __dummy_free,
> + .mmap = __dummy_mmap,
> + .map_page = __dummy_map_page,
> + .unmap_page = __dummy_unmap_page,
> + .map_sg = __dummy_map_sg,
> + .unmap_sg = __dummy_unmap_sg,
> + .sync_single_for_cpu = __dummy_sync_single_for_cpu,
> + .sync_single_for_device = __dummy_sync_single_for_device,
> + .sync_sg_for_cpu = __dummy_sync_sg_for_cpu,
> + .sync_sg_for_device = __dummy_sync_sg_for_device,
> + .mapping_error = __dummy_mapping_error,
> + .dma_supported = __dummy_dma_supported,
> +};
> +EXPORT_SYMBOL(dummy_dma_ops);
> +
>
This will clearly work, but I think it's easier to just leave
the dma_mask pointer as NULL when creating the platform device,
which should let the normal dma ops fail all the callbacks.
Arnd
next prev parent reply other threads:[~2015-05-05 15:44 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-05 15:12 [V2 PATCH 0/5] Introduce ACPI _CCA support and device_dma_is_coherent API Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` [V2 PATCH 1/5] ACPI / scan: Parse _CCA and setup device coherency Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 20:36 ` Rafael J. Wysocki
2015-05-05 20:36 ` Rafael J. Wysocki
2015-05-06 4:15 ` Suravee Suthikulpanit
2015-05-06 4:15 ` Suravee Suthikulpanit
2015-05-06 4:15 ` Suravee Suthikulpanit
2015-05-06 22:21 ` Rafael J. Wysocki
2015-05-06 22:21 ` Rafael J. Wysocki
2015-05-06 22:16 ` Suravee Suthikulanit
2015-05-06 22:16 ` Suravee Suthikulanit
2015-05-06 22:16 ` Suravee Suthikulanit
2015-05-07 9:07 ` [Linaro-acpi] " Arnd Bergmann
2015-05-07 9:07 ` Arnd Bergmann
2015-05-07 20:18 ` Rafael J. Wysocki
2015-05-07 20:18 ` Rafael J. Wysocki
2015-05-06 3:13 ` Hanjun Guo
2015-05-06 3:13 ` Hanjun Guo
2015-05-06 4:17 ` Suravee Suthikulpanit
2015-05-06 4:17 ` Suravee Suthikulpanit
2015-05-06 4:17 ` Suravee Suthikulpanit
2015-05-05 15:12 ` [V2 PATCH 2/5] arm64 : Introduce support for ACPI _CCA object Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:44 ` Arnd Bergmann [this message]
2015-05-05 15:44 ` Arnd Bergmann
2015-05-05 15:44 ` Arnd Bergmann
2015-05-05 16:09 ` Suravee Suthikulanit
2015-05-05 16:09 ` Suravee Suthikulanit
2015-05-05 16:09 ` Suravee Suthikulanit
2015-05-05 16:09 ` Suravee Suthikulanit
2015-05-05 16:12 ` [Linaro-acpi] " Arnd Bergmann
2015-05-05 16:12 ` Arnd Bergmann
2015-05-05 16:13 ` Suravee Suthikulanit
2015-05-05 16:13 ` Suravee Suthikulanit
2015-05-05 16:13 ` Suravee Suthikulanit
2015-05-05 16:24 ` Tom Lendacky
2015-05-05 16:24 ` Tom Lendacky
2015-05-05 16:24 ` Tom Lendacky
2015-05-05 18:02 ` Arnd Bergmann
2015-05-05 18:02 ` Arnd Bergmann
2015-05-06 10:08 ` Robin Murphy
2015-05-06 10:08 ` Robin Murphy
2015-05-06 14:34 ` Suravee Suthikulanit
2015-05-06 14:34 ` Suravee Suthikulanit
2015-05-05 15:12 ` [V2 PATCH 3/5] device property: Introduces device_dma_is_coherent() Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-06 23:52 ` Suravee Suthikulanit
2015-05-06 23:52 ` Suravee Suthikulanit
2015-05-06 23:52 ` Suravee Suthikulanit
2015-05-06 23:58 ` Rafael J. Wysocki
2015-05-06 23:58 ` Rafael J. Wysocki
2015-05-05 15:12 ` [V2 PATCH 4/5] crypto: ccp - Unify coherency checking logic with device_dma_is_coherent() Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` [V2 PATCH 5/5] amd-xgbe: " Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
2015-05-05 15:12 ` Suravee Suthikulpanit
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