From: joro@8bytes.org (Joerg Roedel)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 08/16] iommu/exynos: Make use of domain_alloc and domain_free
Date: Thu, 26 Mar 2015 13:43:11 +0100 [thread overview]
Message-ID: <1427373799-18662-9-git-send-email-joro@8bytes.org> (raw)
In-Reply-To: <1427373799-18662-1-git-send-email-joro@8bytes.org>
From: Joerg Roedel <jroedel@suse.de>
Implement domain_alloc and domain_free iommu-ops as a
replacement for domain_init/domain_destroy.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/exynos-iommu.c | 87 ++++++++++++++++++++++++--------------------
1 file changed, 47 insertions(+), 40 deletions(-)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index dc14fec4..3e89850 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -200,6 +200,7 @@ struct exynos_iommu_domain {
short *lv2entcnt; /* free lv2 entry counter for each section */
spinlock_t lock; /* lock for this structure */
spinlock_t pgtablelock; /* lock for modifying page table @ pgtable */
+ struct iommu_domain domain; /* generic domain data structure */
};
struct sysmmu_drvdata {
@@ -214,6 +215,11 @@ struct sysmmu_drvdata {
phys_addr_t pgtable;
};
+static struct exynos_iommu_domain *to_exynos_domain(struct iommu_domain *dom)
+{
+ return container_of(dom, struct exynos_iommu_domain, domain);
+}
+
static bool set_sysmmu_active(struct sysmmu_drvdata *data)
{
/* return true if the System MMU was not active previously
@@ -696,58 +702,60 @@ static inline void pgtable_flush(void *vastart, void *vaend)
virt_to_phys(vaend));
}
-static int exynos_iommu_domain_init(struct iommu_domain *domain)
+static struct iommu_domain *exynos_iommu_domain_alloc(unsigned type)
{
- struct exynos_iommu_domain *priv;
+ struct exynos_iommu_domain *exynos_domain;
int i;
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
+ if (type != IOMMU_DOMAIN_UNMANAGED)
+ return NULL;
+
+ exynos_domain = kzalloc(sizeof(*exynos_domain), GFP_KERNEL);
+ if (!exynos_domain)
+ return NULL;
- priv->pgtable = (sysmmu_pte_t *)__get_free_pages(GFP_KERNEL, 2);
- if (!priv->pgtable)
+ exynos_domain->pgtable = (sysmmu_pte_t *)__get_free_pages(GFP_KERNEL, 2);
+ if (!exynos_domain->pgtable)
goto err_pgtable;
- priv->lv2entcnt = (short *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1);
- if (!priv->lv2entcnt)
+ exynos_domain->lv2entcnt = (short *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1);
+ if (!exynos_domain->lv2entcnt)
goto err_counter;
/* Workaround for System MMU v3.3 to prevent caching 1MiB mapping */
for (i = 0; i < NUM_LV1ENTRIES; i += 8) {
- priv->pgtable[i + 0] = ZERO_LV2LINK;
- priv->pgtable[i + 1] = ZERO_LV2LINK;
- priv->pgtable[i + 2] = ZERO_LV2LINK;
- priv->pgtable[i + 3] = ZERO_LV2LINK;
- priv->pgtable[i + 4] = ZERO_LV2LINK;
- priv->pgtable[i + 5] = ZERO_LV2LINK;
- priv->pgtable[i + 6] = ZERO_LV2LINK;
- priv->pgtable[i + 7] = ZERO_LV2LINK;
+ exynos_domain->pgtable[i + 0] = ZERO_LV2LINK;
+ exynos_domain->pgtable[i + 1] = ZERO_LV2LINK;
+ exynos_domain->pgtable[i + 2] = ZERO_LV2LINK;
+ exynos_domain->pgtable[i + 3] = ZERO_LV2LINK;
+ exynos_domain->pgtable[i + 4] = ZERO_LV2LINK;
+ exynos_domain->pgtable[i + 5] = ZERO_LV2LINK;
+ exynos_domain->pgtable[i + 6] = ZERO_LV2LINK;
+ exynos_domain->pgtable[i + 7] = ZERO_LV2LINK;
}
- pgtable_flush(priv->pgtable, priv->pgtable + NUM_LV1ENTRIES);
+ pgtable_flush(exynos_domain->pgtable, exynos_domain->pgtable + NUM_LV1ENTRIES);
- spin_lock_init(&priv->lock);
- spin_lock_init(&priv->pgtablelock);
- INIT_LIST_HEAD(&priv->clients);
+ spin_lock_init(&exynos_domain->lock);
+ spin_lock_init(&exynos_domain->pgtablelock);
+ INIT_LIST_HEAD(&exynos_domain->clients);
- domain->geometry.aperture_start = 0;
- domain->geometry.aperture_end = ~0UL;
- domain->geometry.force_aperture = true;
+ exynos_domain->domain.geometry.aperture_start = 0;
+ exynos_domain->domain.geometry.aperture_end = ~0UL;
+ exynos_domain->domain.geometry.force_aperture = true;
- domain->priv = priv;
- return 0;
+ return &exynos_domain->domain;
err_counter:
- free_pages((unsigned long)priv->pgtable, 2);
+ free_pages((unsigned long)exynos_domain->pgtable, 2);
err_pgtable:
- kfree(priv);
- return -ENOMEM;
+ kfree(exynos_domain);
+ return NULL;
}
-static void exynos_iommu_domain_destroy(struct iommu_domain *domain)
+static void exynos_iommu_domain_free(struct iommu_domain *domain)
{
- struct exynos_iommu_domain *priv = domain->priv;
+ struct exynos_iommu_domain *priv = to_exynos_domain(domain);
struct exynos_iommu_owner *owner;
unsigned long flags;
int i;
@@ -773,15 +781,14 @@ static void exynos_iommu_domain_destroy(struct iommu_domain *domain)
free_pages((unsigned long)priv->pgtable, 2);
free_pages((unsigned long)priv->lv2entcnt, 1);
- kfree(domain->priv);
- domain->priv = NULL;
+ kfree(priv);
}
static int exynos_iommu_attach_device(struct iommu_domain *domain,
struct device *dev)
{
struct exynos_iommu_owner *owner = dev->archdata.iommu;
- struct exynos_iommu_domain *priv = domain->priv;
+ struct exynos_iommu_domain *priv = to_exynos_domain(domain);
phys_addr_t pagetable = virt_to_phys(priv->pgtable);
unsigned long flags;
int ret;
@@ -812,7 +819,7 @@ static void exynos_iommu_detach_device(struct iommu_domain *domain,
struct device *dev)
{
struct exynos_iommu_owner *owner;
- struct exynos_iommu_domain *priv = domain->priv;
+ struct exynos_iommu_domain *priv = to_exynos_domain(domain);
phys_addr_t pagetable = virt_to_phys(priv->pgtable);
unsigned long flags;
@@ -988,7 +995,7 @@ static int lv2set_page(sysmmu_pte_t *pent, phys_addr_t paddr, size_t size,
static int exynos_iommu_map(struct iommu_domain *domain, unsigned long l_iova,
phys_addr_t paddr, size_t size, int prot)
{
- struct exynos_iommu_domain *priv = domain->priv;
+ struct exynos_iommu_domain *priv = to_exynos_domain(domain);
sysmmu_pte_t *entry;
sysmmu_iova_t iova = (sysmmu_iova_t)l_iova;
unsigned long flags;
@@ -1042,7 +1049,7 @@ static void exynos_iommu_tlb_invalidate_entry(struct exynos_iommu_domain *priv,
static size_t exynos_iommu_unmap(struct iommu_domain *domain,
unsigned long l_iova, size_t size)
{
- struct exynos_iommu_domain *priv = domain->priv;
+ struct exynos_iommu_domain *priv = to_exynos_domain(domain);
sysmmu_iova_t iova = (sysmmu_iova_t)l_iova;
sysmmu_pte_t *ent;
size_t err_pgsize;
@@ -1119,7 +1126,7 @@ err:
static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *domain,
dma_addr_t iova)
{
- struct exynos_iommu_domain *priv = domain->priv;
+ struct exynos_iommu_domain *priv = to_exynos_domain(domain);
sysmmu_pte_t *entry;
unsigned long flags;
phys_addr_t phys = 0;
@@ -1171,8 +1178,8 @@ static void exynos_iommu_remove_device(struct device *dev)
}
static const struct iommu_ops exynos_iommu_ops = {
- .domain_init = exynos_iommu_domain_init,
- .domain_destroy = exynos_iommu_domain_destroy,
+ .domain_alloc = exynos_iommu_domain_alloc,
+ .domain_free = exynos_iommu_domain_free,
.attach_dev = exynos_iommu_attach_device,
.detach_dev = exynos_iommu_detach_device,
.map = exynos_iommu_map,
--
1.9.1
next prev parent reply other threads:[~2015-03-26 12:43 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-26 12:43 [PATCH 00/16 v2] iommu: Move domain allocation into drivers Joerg Roedel
2015-03-26 12:43 ` [PATCH 01/16] iommu: Introduce domain_alloc and domain_free iommu_ops Joerg Roedel
2015-03-26 12:43 ` [PATCH 02/16] iommu: Introduce iommu domain types Joerg Roedel
2015-03-26 12:52 ` Swapna Nannapaneni
2015-03-26 12:43 ` [PATCH 03/16] iommu: Only allow iommu_map/unmap for paging domains Joerg Roedel
2015-03-26 12:43 ` [PATCH 04/16] iommu/amd: Make use of domain_alloc and domain_free Joerg Roedel
2015-03-26 12:43 ` [PATCH 05/16] iommu/vt-d: " Joerg Roedel
2015-03-26 12:43 ` [PATCH 06/16] iommu/omap: " Joerg Roedel
2015-03-26 12:43 ` [PATCH 07/16] iommu/arm-smmu: " Joerg Roedel
2015-03-26 12:43 ` Joerg Roedel [this message]
2015-03-26 12:43 ` [PATCH 09/16] iommu/tegra-smmu: " Joerg Roedel
2015-03-27 10:59 ` Thierry Reding
2015-03-26 12:43 ` [PATCH 10/16] iommu/tegra-gart: " Joerg Roedel
2015-03-27 11:00 ` Thierry Reding
2015-03-26 12:43 ` [PATCH 11/16] iommu/msm: " Joerg Roedel
2015-03-26 12:43 ` [PATCH 12/16] iommu/shmobile: " Joerg Roedel
2015-03-26 12:43 ` [PATCH 13/16] iommu/ipmmu-vmsa: " Joerg Roedel
2015-03-26 12:43 ` [PATCH 14/16] iommu/rockchip: " Joerg Roedel
2015-03-26 12:43 ` [PATCH 15/16] iommu/fsl: " Joerg Roedel
2015-04-12 14:25 ` Varun Sethi
2015-03-26 12:43 ` [PATCH 16/16] iommu: Remove domain_init and domain_free iommu_ops Joerg Roedel
2015-03-27 11:03 ` [PATCH 00/16 v2] iommu: Move domain allocation into drivers Thierry Reding
2015-03-27 16:39 ` Heiko Stuebner
2015-03-28 4:24 ` Alex Williamson
2015-03-31 13:14 ` Joerg Roedel
2015-03-30 17:43 ` Will Deacon
2015-03-31 13:18 ` Joerg Roedel
2015-03-31 13:33 ` Joerg Roedel
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=1427373799-18662-9-git-send-email-joro@8bytes.org \
--to=joro@8bytes.org \
--cc=linux-arm-kernel@lists.infradead.org \
/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).