From: Chao Hao <chao.hao@mediatek.com>
To: Joerg Roedel <joro@8bytes.org>, Rob Herring <robh+dt@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>
Cc: <iommu@lists.linux-foundation.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>, <wsd_upstream@mediatek.com>,
Jun Yan <jun.yan@mediatek.com>,
Cui Zhang <cui.zhang@mediatek.com>,
Guangming Cao <guangming.cao@mediatek.com>,
Yong Wu <yong.wu@mediatek.com>, Anan Sun <anan.sun@mediatek.com>,
Miles Chen <miles.chen@mediatek.com>,
Chao Hao <chao.hao@mediatek.com>
Subject: [RESEND,PATCH 06/13] iommu/mediatek: Change get the way of m4u_group
Date: Mon, 4 Nov 2019 19:52:31 +0800 [thread overview]
Message-ID: <20191104115238.2394-7-chao.hao@mediatek.com> (raw)
In-Reply-To: <20191104115238.2394-1-chao.hao@mediatek.com>
1. Redefine mtk_iommu_domain structure, it will include iommu_group
and iommu_domain. Different mtk_iommu_domains can be distinguished by
ID. When we realize multiple mtk_iommu_domains, every mtk_iommu_domain
can describe one iova region.
2. In theory, every device has one iommu_group, so this patch will
get iommu_group by checking device. All the devices belong to the same
m4u_group currently, so they also use the same mtk_iommu_domain(id=0).
Signed-off-by: Chao Hao <chao.hao@mediatek.com>
---
drivers/iommu/mtk_iommu.c | 46 +++++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index f264fa8c16a0..27995b2b29a6 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -117,12 +117,16 @@
#define MTK_M4U_TO_PORT(id) ((id) & 0x1f)
struct mtk_iommu_domain {
+ u32 id;
struct iommu_domain domain;
+ struct iommu_group *group;
+ struct list_head list;
};
struct mtk_iommu_pgtable {
struct io_pgtable_cfg cfg;
struct io_pgtable_ops *iop;
+ struct list_head m4u_dom_v2;
};
static struct mtk_iommu_pgtable *share_pgtable;
@@ -173,6 +177,41 @@ static struct mtk_iommu_data *mtk_iommu_get_m4u_data(void)
return NULL;
}
+static u32 get_domain_id(void)
+{
+ /* only support one mtk_iommu_domain currently */
+ return 0;
+}
+
+static u32 mtk_iommu_get_domain_id(void)
+{
+ return get_domain_id();
+}
+
+static struct mtk_iommu_domain *get_mtk_domain(struct device *dev)
+{
+ struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv;
+ struct mtk_iommu_domain *dom;
+ u32 domain_id = mtk_iommu_get_domain_id();
+
+ list_for_each_entry(dom, &data->pgtable->m4u_dom_v2, list) {
+ if (dom->id == domain_id)
+ return dom;
+ }
+ return NULL;
+}
+
+static struct iommu_group *mtk_iommu_get_group(struct device *dev)
+{
+ struct mtk_iommu_domain *dom;
+
+ dom = get_mtk_domain(dev);
+ if (dom)
+ return dom->group;
+
+ return NULL;
+}
+
static struct mtk_iommu_pgtable *mtk_iommu_get_pgtable(void)
{
return share_pgtable;
@@ -334,6 +373,8 @@ static struct mtk_iommu_pgtable *create_pgtable(struct mtk_iommu_data *data)
if (!pgtable)
return ERR_PTR(-ENOMEM);
+ INIT_LIST_HEAD(&pgtable->m4u_dom_v2);
+
pgtable->cfg = (struct io_pgtable_cfg) {
.quirks = IO_PGTABLE_QUIRK_ARM_NS |
IO_PGTABLE_QUIRK_NO_PERMS |
@@ -388,6 +429,7 @@ static int mtk_iommu_attach_pgtable(struct mtk_iommu_data *data,
static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type)
{
struct mtk_iommu_pgtable *pgtable = mtk_iommu_get_pgtable();
+ struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
struct mtk_iommu_domain *dom;
if (type != IOMMU_DOMAIN_DMA)
@@ -405,12 +447,15 @@ static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type)
if (iommu_get_dma_cookie(&dom->domain))
goto free_dom;
+ dom->group = data->m4u_group;
+ dom->id = mtk_iommu_get_domain_id();
/* Update our support page sizes bitmap */
dom->domain.pgsize_bitmap = pgtable->cfg.pgsize_bitmap;
dom->domain.geometry.aperture_start = 0;
dom->domain.geometry.aperture_end = DMA_BIT_MASK(32);
dom->domain.geometry.force_aperture = true;
+ list_add_tail(&dom->list, &pgtable->m4u_dom_v2);
return &dom->domain;
@@ -566,6 +611,7 @@ static struct iommu_group *mtk_iommu_device_group(struct device *dev)
}
/* All the client devices are in the same m4u iommu-group */
+ data->m4u_group = mtk_iommu_get_group(dev);
if (!data->m4u_group) {
data->m4u_group = iommu_group_alloc();
if (IS_ERR(data->m4u_group))
--
2.18.0
next prev parent reply other threads:[~2019-11-04 11:53 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-04 11:52 [RESEND,PATCH 00/13] MT6779 IOMMU SUPPORT Chao Hao
2019-11-04 11:52 ` [RESEND,PATCH 01/13] dt-bindings: mediatek: Add bindings for MT6779 Chao Hao
2019-11-06 23:40 ` Rob Herring
2019-12-16 12:05 ` Yong Wu
2019-12-20 11:01 ` chao hao
2019-11-04 11:52 ` [RESEND,PATCH 02/13] iommu/mediatek: Add mt6779 IOMMU basic support Chao Hao
2019-12-16 12:07 ` Yong Wu
2019-12-25 6:58 ` chao hao
2019-11-04 11:52 ` [RESEND,PATCH 03/13] iommu/mediatek: Add mtk_iommu_pgtable structure Chao Hao
2019-12-16 12:13 ` Yong Wu
2019-12-31 9:39 ` chao hao
2020-02-15 12:17 ` Yong Wu
2020-02-25 7:25 ` chao hao
2020-02-26 6:36 ` chao hao
2019-11-04 11:52 ` [RESEND,PATCH 04/13] iommu/mediatek: Remove mtk_iommu_domain_finalise Chao Hao
2019-11-04 11:52 ` [RESEND,PATCH 05/13] iommu/mediatek: Remove pgtable info in mtk_iommu_domain Chao Hao
2019-11-04 11:52 ` Chao Hao [this message]
2019-11-04 11:52 ` [RESEND,PATCH 07/13] iommu/mediatek: Add smi_larb info about device Chao Hao
2019-11-04 11:52 ` [RESEND,PATCH 08/13] iommu/mediatek: Add mtk_domain_data structure Chao Hao
2019-11-04 11:52 ` [RESEND,PATCH 09/13] iommu/mediatek: Remove the usage of m4u_dom variable Chao Hao
2019-11-04 11:52 ` [RESEND,PATCH 10/13] iommu/mediatek: Remove mtk_iommu_get_m4u_data api Chao Hao
2019-11-04 11:52 ` [RESEND,PATCH 11/13] iommu/mediatek: Add iova reserved function Chao Hao
2019-11-04 11:52 ` [RESEND,PATCH 12/13] iommu/mediatek: Change single domain to multiple domains Chao Hao
2019-11-04 11:52 ` [RESEND, PATCH 13/13] iommu/mediatek: Add multiple mtk_iommu_domain support for mt6779 Chao Hao
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