[PATCH v6 24/33] iommu/mediatek: Move domain_finalise into attach_device

Yong Wu
2021-01-11T11:23:42Z

Currently domain_alloc only has a parameter(type), We have no chance to
input some special data. This patch moves the domain_finalise into
attach_device which has the device information, then could update
the domain's geometry.aperture ranges for each a device.

Strictly, I should use the data from mtk_iommu_get_m4u_data as the
parameter of mtk_iommu_domain_finalise in this patch. but dom->data
only is used in tlb ops in which the data is get from the m4u_list, thus
it is ok here.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
drivers/iommu/mtk_iommu.c | 31 ++++++++++++-------------------
1 file changed, 12 insertions(+), 19 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index f1941608ccb7..d321d09ac4c2 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -328,10 +328,9 @@ static void mtk_iommu_config(struct mtk_iommu_data *data,
}
}

-static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom)
+static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom,
+ struct mtk_iommu_data *data)
{
- struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
-
dom->cfg = (struct io_pgtable_cfg) {
.quirks = IO_PGTABLE_QUIRK_ARM_NS |
IO_PGTABLE_QUIRK_NO_PERMS |
@@ -352,7 +351,6 @@ static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom)
return -EINVAL;
}

- dom->data = data;
/* Update our support page sizes bitmap */
dom->domain.pgsize_bitmap = dom->cfg.pgsize_bitmap;
return 0;
@@ -369,30 +367,19 @@ static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type)
if (!dom)
return NULL;

- if (iommu_get_dma_cookie(&dom->domain))
- goto free_dom;
-
- if (mtk_iommu_domain_finalise(dom))
- goto put_dma_cookie;
+ if (iommu_get_dma_cookie(&dom->domain)) {
+ kfree(dom);
+ return NULL;
+ }

dom->domain.geometry.aperture_start = 0;
dom->domain.geometry.aperture_end = DMA_BIT_MASK(32);
dom->domain.geometry.force_aperture = true;
-
return &dom->domain;
-
-put_dma_cookie:
- iommu_put_dma_cookie(&dom->domain);
-free_dom:
- kfree(dom);
- return NULL;
}

static void mtk_iommu_domain_free(struct iommu_domain *domain)
{
- struct mtk_iommu_domain *dom = to_mtk_domain(domain);
-
- free_io_pgtable_ops(dom->iop);
iommu_put_dma_cookie(domain);
kfree(to_mtk_domain(domain));
}
@@ -408,6 +395,12 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
if (!data)
return -ENODEV;

+ if (!dom->data) {
+ if (mtk_iommu_domain_finalise(dom, data))
+ return -ENODEV;
+ dom->data = data;
+ }
+
if (!data->m4u_dom) { /* Initialize the M4U HW */
ret = pm_runtime_resume_and_get(m4udev);
if (ret < 0)
--
2.18.0