iommu.lists.linux-foundation.org archive mirror
 help / color / mirror / Atom feed
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: Anan Sun <anan.sun@mediatek.com>,
	devicetree@vger.kernel.org, Cui Zhang <cui.zhang@mediatek.com>,
	Jun Yan <jun.yan@mediatek.com>,
	wsd_upstream@mediatek.com, linux-kernel@vger.kernel.org,
	Chao Hao <chao.hao@mediatek.com>,
	iommu@lists.linux-foundation.org,
	linux-mediatek@lists.infradead.org,
	Miles Chen <miles.chen@mediatek.com>,
	linux-arm-kernel@lists.infradead.org,
	Guangming Cao <guangming.cao@mediatek.com>
Subject: [RESEND, PATCH 10/13] iommu/mediatek: Remove mtk_iommu_get_m4u_data api
Date: Mon, 4 Nov 2019 19:52:35 +0800	[thread overview]
Message-ID: <20191104115238.2394-11-chao.hao@mediatek.com> (raw)
In-Reply-To: <20191104115238.2394-1-chao.hao@mediatek.com>

Based on previous modifications in the patchset, A mtk_iommu_data
structure represent a iommu, we will add mtk_iommu_data to mtk_iommu_domain
to show the iommu which mtk_iommu_domain belongs to, so we can get
mtk_iommu_data by mtk_iommu_domain, don't use to "mtk_iommu_get_m4u_data"
any more.

Besides, there is a small SW adjustment, we will move alloc iommu_group
into "create_iommu_group"

Signed-off-by: Chao Hao <chao.hao@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 74 +++++++++++++++++++--------------------
 1 file changed, 37 insertions(+), 37 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 42fad1cf73f3..8c06d2a793a7 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -121,6 +121,7 @@ struct mtk_iommu_domain {
 	u32				id;
 	struct iommu_domain		domain;
 	struct iommu_group		*group;
+	struct mtk_iommu_data		*data;
 	struct list_head		list;
 };
 
@@ -168,23 +169,6 @@ static LIST_HEAD(m4ulist);	/* List all the M4U HWs */
 
 #define for_each_m4u(data)	list_for_each_entry(data, &m4ulist, list)
 
-/*
- * There may be 1 or 2 M4U HWs, But we always expect they are in the same domain
- * for the performance.
- *
- * Here always return the mtk_iommu_data of the first probed M4U where the
- * iommu domain information is recorded.
- */
-static struct mtk_iommu_data *mtk_iommu_get_m4u_data(void)
-{
-	struct mtk_iommu_data *data;
-
-	for_each_m4u(data)
-		return data;
-
-	return NULL;
-}
-
 static u32 get_domain_id(struct mtk_iommu_data *data, u32 portid)
 {
 	u32 dom_id = 0;
@@ -403,6 +387,27 @@ static void mtk_iommu_config(struct mtk_iommu_data *data,
 	}
 }
 
+static struct iommu_group *create_iommu_group(struct mtk_iommu_data *data,
+					      struct device *dev)
+{
+	struct mtk_iommu_pgtable *pgtable = mtk_iommu_get_pgtable();
+
+	/* Prepare for allocate mtk_iommu_domain */
+	data->m4u_group = mtk_iommu_get_group(dev);
+	if (!data->m4u_group) {
+		data->m4u_group = iommu_group_alloc();
+		if (IS_ERR(data->m4u_group))
+			dev_err(dev, "Failed to allocate M4U IOMMU group\n");
+	} else {
+		iommu_group_ref_get(data->m4u_group);
+	}
+
+	/* save the latest init device */
+	pgtable->init_dev = dev;
+
+	return data->m4u_group;
+}
+
 static struct mtk_iommu_pgtable *create_pgtable(struct mtk_iommu_data *data)
 {
 	struct mtk_iommu_pgtable *pgtable;
@@ -468,7 +473,7 @@ 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_data *data;
 	struct mtk_iommu_domain *dom;
 	struct device *dev;
 
@@ -477,6 +482,7 @@ static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type)
 
 	if (pgtable) {
 		dev = pgtable->init_dev;
+		data = dev_iommu_fwspec_get(dev)->iommu_priv;
 		if (!data->m4u_group) {
 			pr_err("%s, find m4u_group failed\n", __func__);
 			return NULL;
@@ -497,6 +503,7 @@ static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type)
 	if (dom->id >= data->plat_data->dom_cnt)
 		goto  put_dma_cookie;
 
+	dom->data = data;
 	dom->group = data->m4u_group;
 	/* Update our support page sizes bitmap */
 	dom->domain.pgsize_bitmap = pgtable->cfg.pgsize_bitmap;
@@ -554,7 +561,8 @@ static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova,
 			 phys_addr_t paddr, size_t size, int prot)
 {
 	struct mtk_iommu_pgtable *pgtable = mtk_iommu_get_pgtable();
-	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
+	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
+	struct mtk_iommu_data *data = dom->data;
 
 	/* The "4GB mode" M4U physically can not use the lower remap of Dram. */
 	if (data->enable_4GB)
@@ -575,27 +583,30 @@ static size_t mtk_iommu_unmap(struct iommu_domain *domain,
 
 static void mtk_iommu_flush_iotlb_all(struct iommu_domain *domain)
 {
-	mtk_iommu_tlb_flush_all(mtk_iommu_get_m4u_data());
+	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
+
+	mtk_iommu_tlb_flush_all(dom->data);
 }
 
 static void mtk_iommu_iotlb_sync(struct iommu_domain *domain,
 				 struct iommu_iotlb_gather *gather)
 {
-	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
+	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
 	size_t length = gather->end - gather->start;
 
 	if (gather->start == ULONG_MAX)
 		return;
 
 	mtk_iommu_tlb_flush_range_sync(gather->start, length, gather->pgsize,
-				       data);
+				       dom->data);
 }
 
 static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain,
 					  dma_addr_t iova)
 {
 	struct mtk_iommu_pgtable *pgtable = mtk_iommu_get_pgtable();
-	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
+	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
+	struct mtk_iommu_data *data = dom->data;
 	phys_addr_t pa;
 
 	pa = pgtable->iop->iova_to_phys(pgtable->iop, iova);
@@ -642,7 +653,7 @@ static void mtk_iommu_remove_device(struct device *dev)
 
 static struct iommu_group *mtk_iommu_device_group(struct device *dev)
 {
-	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
+	struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv;
 	struct mtk_iommu_pgtable *pgtable;
 	int ret = 0;
 
@@ -658,20 +669,9 @@ 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))
-			dev_err(dev, "Failed to allocate M4U IOMMU group\n");
-	} else {
-		iommu_group_ref_get(data->m4u_group);
-	}
+	dev_info(data->dev, "%s, init data:%d\n", __func__, data->m4u_id);
 
-	/* save the latest init device */
-	pgtable->init_dev = dev;
-
-	return data->m4u_group;
+	return create_iommu_group(data, dev);
 }
 
 static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
-- 
2.18.0

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

  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 ` [RESEND,PATCH 06/13] iommu/mediatek: Change get the way of m4u_group Chao Hao
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 ` Chao Hao [this message]
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20191104115238.2394-11-chao.hao@mediatek.com \
    --to=chao.hao@mediatek.com \
    --cc=anan.sun@mediatek.com \
    --cc=cui.zhang@mediatek.com \
    --cc=devicetree@vger.kernel.org \
    --cc=guangming.cao@mediatek.com \
    --cc=iommu@lists.linux-foundation.org \
    --cc=joro@8bytes.org \
    --cc=jun.yan@mediatek.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mediatek@lists.infradead.org \
    --cc=matthias.bgg@gmail.com \
    --cc=miles.chen@mediatek.com \
    --cc=robh+dt@kernel.org \
    --cc=wsd_upstream@mediatek.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).