From: Jeffy Chen <jeffy.chen@rock-chips.com>
To: linux-kernel@vger.kernel.org
Cc: jcliang@chromium.org, robin.murphy@arm.com, xxm@rock-chips.com,
tfiga@chromium.org, Jeffy Chen <jeffy.chen@rock-chips.com>,
Heiko Stuebner <heiko@sntech.de>,
linux-rockchip@lists.infradead.org,
iommu@lists.linux-foundation.org, Joerg Roedel <joro@8bytes.org>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v7 14/14] iommu/rockchip: Support sharing IOMMU between masters
Date: Tue, 6 Mar 2018 11:27:59 +0800 [thread overview]
Message-ID: <20180306032759.29069-5-jeffy.chen@rock-chips.com> (raw)
In-Reply-To: <20180306032759.29069-1-jeffy.chen@rock-chips.com>
There would be some masters sharing the same IOMMU device. Put them in
the same iommu group and share the same iommu domain.
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
---
Changes in v7:
Use iommu_group_ref_get to avoid ref leak
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3:
Remove rk_iommudata->domain.
Changes in v2: None
drivers/iommu/rockchip-iommu.c | 22 ++++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index db08978203f7..6a1c7efa7c17 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -104,6 +104,7 @@ struct rk_iommu {
struct iommu_device iommu;
struct list_head node; /* entry in rk_iommu_domain.iommus */
struct iommu_domain *domain; /* domain to which iommu is attached */
+ struct iommu_group *group;
};
/**
@@ -1091,6 +1092,15 @@ static void rk_iommu_remove_device(struct device *dev)
iommu_group_remove_device(dev);
}
+static struct iommu_group *rk_iommu_device_group(struct device *dev)
+{
+ struct rk_iommu *iommu;
+
+ iommu = rk_iommu_from_dev(dev);
+
+ return iommu_group_ref_get(iommu->group);
+}
+
static int rk_iommu_of_xlate(struct device *dev,
struct of_phandle_args *args)
{
@@ -1122,7 +1132,7 @@ static const struct iommu_ops rk_iommu_ops = {
.add_device = rk_iommu_add_device,
.remove_device = rk_iommu_remove_device,
.iova_to_phys = rk_iommu_iova_to_phys,
- .device_group = generic_device_group,
+ .device_group = rk_iommu_device_group,
.pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP,
.of_xlate = rk_iommu_of_xlate,
};
@@ -1191,9 +1201,15 @@ static int rk_iommu_probe(struct platform_device *pdev)
if (err)
return err;
+ iommu->group = iommu_group_alloc();
+ if (IS_ERR(iommu->group)) {
+ err = PTR_ERR(iommu->group);
+ goto err_unprepare_clocks;
+ }
+
err = iommu_device_sysfs_add(&iommu->iommu, dev, NULL, dev_name(dev));
if (err)
- goto err_unprepare_clocks;
+ goto err_put_group;
iommu_device_set_ops(&iommu->iommu, &rk_iommu_ops);
iommu_device_set_fwnode(&iommu->iommu, &dev->of_node->fwnode);
@@ -1217,6 +1233,8 @@ static int rk_iommu_probe(struct platform_device *pdev)
return 0;
err_remove_sysfs:
iommu_device_sysfs_remove(&iommu->iommu);
+err_put_group:
+ iommu_group_put(iommu->group);
err_unprepare_clocks:
clk_bulk_unprepare(iommu->num_clocks, iommu->clocks);
return err;
--
2.11.0
prev parent reply other threads:[~2018-03-06 3:29 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-06 3:02 [PATCH v7 00/14] iommu/rockchip: Use OF_IOMMU Jeffy Chen
2018-03-06 3:02 ` [PATCH v7 01/14] iommu/rockchip: Prohibit unbind and remove Jeffy Chen
2018-03-07 12:55 ` Robin Murphy
2018-03-06 3:02 ` [PATCH v7 02/14] iommu/rockchip: Fix error handling in probe Jeffy Chen
2018-03-07 12:59 ` Robin Murphy
2018-03-06 3:02 ` [PATCH v7 03/14] iommu/rockchip: Request irqs in rk_iommu_probe() Jeffy Chen
2018-03-07 13:00 ` Robin Murphy
2018-03-06 3:21 ` [PATCH v7 04/14] iommu/rockchip: Fix error handling in attach Jeffy Chen
2018-03-06 3:21 ` [PATCH v7 05/14] iommu/rockchip: Use iopoll helpers to wait for hardware Jeffy Chen
2018-03-06 3:21 ` [PATCH v7 06/14] iommu/rockchip: Fix TLB flush of secondary IOMMUs Jeffy Chen
2018-03-06 3:21 ` [PATCH v7 07/14] ARM: dts: rockchip: add clocks in iommu nodes Jeffy Chen
2018-03-06 3:21 ` [PATCH v7 08/14] iommu/rockchip: Control clocks needed to access the IOMMU Jeffy Chen
2018-03-06 3:21 ` [PATCH v7 09/14] dt-bindings: iommu/rockchip: Add clock property Jeffy Chen
2018-03-07 13:01 ` Robin Murphy
2018-03-06 3:27 ` [PATCH v7 10/14] iommu/rockchip: Use IOMMU device for dma mapping operations Jeffy Chen
2018-03-06 3:27 ` [PATCH v7 11/14] iommu/rockchip: Use OF_IOMMU to attach devices automatically Jeffy Chen
2018-03-06 3:27 ` [PATCH v7 12/14] iommu/rockchip: Fix error handling in init Jeffy Chen
2018-03-06 3:27 ` [PATCH v7 13/14] iommu/rockchip: Add runtime PM support Jeffy Chen
2018-03-06 10:07 ` Tomasz Figa
2018-03-07 3:24 ` Tomasz Figa
[not found] ` <5A9F598E.4020704@rock-chips.com>
2018-03-07 3:26 ` Tomasz Figa
2018-03-06 3:27 ` Jeffy Chen [this message]
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