From: swarren@wwwdotorg•org (Stephen Warren)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 14/22] iommu/tegra: smmu: Register platform_device to IOMMU dynamically
Date: Thu, 18 Jul 2013 14:17:21 -0600 [thread overview]
Message-ID: <51E84D51.2030404@wwwdotorg.org> (raw)
In-Reply-To: <1373021097-32420-15-git-send-email-hdoyu@nvidia.com>
On 07/05/2013 04:44 AM, Hiroshi Doyu wrote:
> Register platform_devices to IOMMU dynamically via
> ops->{add,remove}_device().
> diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
> +/*
> + * ASID[0] for the system default
> + * ASID[1] for PPCS, which has SDMMC
I have no idea what PPCS is. The patch description for 21/22 implies
much more than SDMMC is "in PPCS"...
> + * ASID[2][3].. open for drivers, first come, first served.
> + */
> +enum {
> + SYSTEM_DEFAULT,
> + SYSTEM_PROTECTED,
> +};
Why hard-code this mapping? Can't devices be assigned to ASIDs based on
a DT property? I assume there's nothing in the SMMU HW that requires
specific ASIDs to be used?
I don't see anything in this series which implements the "open for
drivers" part of the description for ASID 2/3/...
Perhaps not so relevant here since this patch only uses SYSTEM_DEFAULT
as the ASID number, but don't you need to validate that smmu->num_as is
large enough to support all values in the enum definition above?
Since this patch doesn't actually use anything other than
SYSTEM_DEFAULT, I wonder if this patch shouldn't be squashed into patch
21/22, where multiple ASIDs are actually used?
next prev parent reply other threads:[~2013-07-18 20:17 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-05 10:44 [PATCH v2 00/22] Unified SMMU driver among Tegra SoCs Hiroshi Doyu
2013-07-05 10:44 ` [PATCH v2 01/22] [HACK] of: dev_node has struct device pointer Hiroshi Doyu
2013-07-16 22:57 ` Stephen Warren
2013-07-16 23:16 ` Thierry Reding
2013-07-29 10:13 ` Hiroshi Doyu
2013-07-29 13:13 ` Lorenzo Pieralisi
2013-07-05 10:44 ` [PATCH v2 02/22] ARM: tegra: Populate AHB/IOMMU earlier than others Hiroshi Doyu
2013-07-16 23:03 ` Stephen Warren
2013-07-05 10:44 ` [PATCH v2 03/22] ARM: tegra: Create a DT header defining swgroups ID Hiroshi Doyu
2013-07-16 23:07 ` Stephen Warren
2013-07-29 10:53 ` Hiroshi Doyu
2013-07-29 17:45 ` Stephen Warren
2013-07-30 4:56 ` Hiroshi Doyu
2013-07-05 10:44 ` [PATCH v2 04/22] ARM: dt: tegra30: iommu: Add "nvidia,swgroup" Hiroshi Doyu
2013-07-16 23:10 ` Stephen Warren
2013-07-05 10:44 ` [PATCH v2 05/22] ARM: dt: tegra30: iommu: Add "nvidia,memory-client" Hiroshi Doyu
2013-07-16 23:14 ` [PATCH v2 05/22] ARM: dt: tegra30: iommu: Add "nvidia, memory-client" Stephen Warren
2013-07-29 11:06 ` [PATCH v2 05/22] ARM: dt: tegra30: iommu: Add "nvidia,memory-client" Hiroshi Doyu
2013-07-29 17:47 ` [PATCH v2 05/22] ARM: dt: tegra30: iommu: Add "nvidia, memory-client" Stephen Warren
2013-07-30 5:11 ` [PATCH v2 05/22] ARM: dt: tegra30: iommu: Add "nvidia,memory-client" Hiroshi Doyu
2013-07-05 10:44 ` [PATCH v2 06/22] ARM: dt: tegra114: iommu: Fix IOMMU register address Hiroshi Doyu
2013-07-16 23:18 ` Stephen Warren
2013-07-16 23:27 ` Thierry Reding
2013-07-05 10:44 ` [PATCH v2 07/22] ARM: dt: tegra114: iommu: Add "nvidia,swgroups" Hiroshi Doyu
2013-07-05 10:44 ` [PATCH v2 08/22] ARM: dt: tegra114: Add "nvidia,memory-client" Hiroshi Doyu
2013-07-05 10:44 ` [PATCH v2 09/22] amba: Move AHB to core_initcall Hiroshi Doyu
2013-07-16 23:20 ` Stephen Warren
2013-07-05 10:44 ` [PATCH v2 10/22] iommu/tegra: smmu: Move IOMMU " Hiroshi Doyu
2013-07-16 23:21 ` Stephen Warren
2013-07-05 10:44 ` [PATCH v2 11/22] iommu/tegra: smmu: Add Tegra 114 support Hiroshi Doyu
2013-07-18 20:01 ` Stephen Warren
2013-07-05 10:44 ` [PATCH v2 12/22] iommu/tegra: smmu: Select ARM_DMA_USE_IOMMU in Kconfig Hiroshi Doyu
2013-07-05 10:44 ` [PATCH v2 13/22] iommu/tegra: smmu: Create default IOVA maps Hiroshi Doyu
2013-07-18 20:10 ` Stephen Warren
2013-07-29 11:24 ` Hiroshi Doyu
2013-07-29 17:50 ` Stephen Warren
2013-07-05 10:44 ` [PATCH v2 14/22] iommu/tegra: smmu: Register platform_device to IOMMU dynamically Hiroshi Doyu
2013-07-18 20:17 ` Stephen Warren [this message]
2013-07-29 11:27 ` Hiroshi Doyu
2013-07-29 17:54 ` Stephen Warren
2013-07-30 5:18 ` Hiroshi Doyu
2013-07-05 10:44 ` [PATCH v2 15/22] iommu/tegra: smmu: Calculate ASID register offset by ID Hiroshi Doyu
2013-07-18 20:18 ` Stephen Warren
2013-07-05 10:44 ` [PATCH v2 16/22] iommu/tegra: smmu: Get "nvidia,swgroup" from DT Hiroshi Doyu
2013-07-18 20:28 ` Stephen Warren
2013-07-29 11:39 ` Hiroshi Doyu
2013-07-29 18:00 ` Stephen Warren
2013-07-05 10:44 ` [PATCH v2 17/22] iommu/tegra: smmu: Unfied driver for Tegra SoCs Hiroshi Doyu
2013-07-05 10:44 ` [PATCH v2 18/22] iommu/tegra: smmu: Use dt-bindings MACRO Hiroshi Doyu
2013-07-18 20:30 ` Stephen Warren
2013-07-05 10:44 ` [PATCH v2 19/22] iommu/tegra: smmu: Workaround PCIe IOMMU'able Hiroshi Doyu
2013-07-18 20:33 ` Stephen Warren
2013-07-05 10:44 ` [PATCH v2 20/22] iommu/tegra: smmu: Get "nvidia, memory-client" from DT Hiroshi Doyu
2013-07-18 20:40 ` [PATCH v2 20/22] iommu/tegra: smmu: Get "nvidia,memory-client" " Stephen Warren
2013-07-05 10:44 ` [PATCH v2 21/22] iommu/tegra: smmu: Support Multiple ASID Hiroshi Doyu
2013-07-18 20:43 ` Stephen Warren
2013-07-29 10:31 ` Hiroshi Doyu
2013-07-29 17:41 ` Stephen Warren
2013-07-30 5:22 ` Hiroshi Doyu
2013-07-05 10:44 ` [PATCH v2 22/22] ARM: dma-mapping: Drop GFP_COMP for DMA memory allocations Hiroshi Doyu
2013-07-18 20:45 ` Stephen Warren
2013-07-05 11:03 ` [PATCH v2 00/22] Unified SMMU driver among Tegra SoCs Marc Dietrich
2013-07-05 11:08 ` Hiroshi Doyu
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