From: Thierry Reding <treding@nvidia.com>
Date: Fri, 4 May 2018 15:02:24 +0200
Subject: drm/tegra: Refactor IOMMU attach/detach
Git-commit: 0c407de5ed1a329468122cbf4f3e727e0c1e3f36
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Attaching to and detaching from an IOMMU uses the same code sequence in
every driver, so factor it out into separate helpers.
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/tegra/dc.c | 42 ++++++---------------------------------
drivers/gpu/drm/tegra/drm.c | 46 +++++++++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/tegra/drm.h | 4 +++
drivers/gpu/drm/tegra/gr2d.c | 32 +++++++----------------------
drivers/gpu/drm/tegra/gr3d.c | 31 ++++++----------------------
5 files changed, 72 insertions(+), 83 deletions(-)
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -1837,21 +1837,11 @@ static int tegra_dc_init(struct host1x_c
if (!dc->syncpt)
dev_warn(dc->dev, "failed to allocate syncpoint\n");
- if (tegra->domain) {
- dc->group = iommu_group_get(client->dev);
-
- if (dc->group && dc->group != tegra->group) {
- err = iommu_attach_group(tegra->domain, dc->group);
- if (err < 0) {
- dev_err(dc->dev,
- "failed to attach to domain: %d\n",
- err);
- iommu_group_put(dc->group);
- return err;
- }
-
- tegra->group = dc->group;
- }
+ dc->group = host1x_client_iommu_attach(client, true);
+ if (IS_ERR(dc->group)) {
+ err = PTR_ERR(dc->group);
+ dev_err(client->dev, "failed to attach to domain: %d\n", err);
+ return err;
}
if (dc->soc->wgrps)
@@ -1916,15 +1906,7 @@ cleanup:
if (!IS_ERR(primary))
drm_plane_cleanup(primary);
- if (dc->group) {
- if (dc->group == tegra->group) {
- iommu_detach_group(tegra->domain, dc->group);
- tegra->group = NULL;
- }
-
- iommu_group_put(dc->group);
- }
-
+ host1x_client_iommu_detach(client, dc->group);
host1x_syncpt_free(dc->syncpt);
return err;
@@ -1932,9 +1914,7 @@ cleanup:
static int tegra_dc_exit(struct host1x_client *client)
{
- struct drm_device *drm = dev_get_drvdata(client->parent);
struct tegra_dc *dc = host1x_client_to_dc(client);
- struct tegra_drm *tegra = drm->dev_private;
int err;
devm_free_irq(dc->dev, dc->irq, dc);
@@ -1945,15 +1925,7 @@ static int tegra_dc_exit(struct host1x_c
return err;
}
- if (dc->group) {
- if (dc->group == tegra->group) {
- iommu_detach_group(tegra->domain, dc->group);
- tegra->group = NULL;
- }
-
- iommu_group_put(dc->group);
- }
-
+ host1x_client_iommu_detach(client, dc->group);
host1x_syncpt_free(dc->syncpt);
return 0;
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -1101,6 +1101,52 @@ int tegra_drm_unregister_client(struct t
return 0;
}
+struct iommu_group *host1x_client_iommu_attach(struct host1x_client *client,
+ bool shared)
+{
+ struct drm_device *drm = dev_get_drvdata(client->parent);
+ struct tegra_drm *tegra = drm->dev_private;
+ struct iommu_group *group = NULL;
+ int err;
+
+ if (tegra->domain) {
+ group = iommu_group_get(client->dev);
+ if (!group) {
+ dev_err(client->dev, "failed to get IOMMU group\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ if (!shared || (shared && (group != tegra->group))) {
+ err = iommu_attach_group(tegra->domain, group);
+ if (err < 0) {
+ iommu_group_put(group);
+ return ERR_PTR(err);
+ }
+
+ if (shared && !tegra->group)
+ tegra->group = group;
+ }
+ }
+
+ return group;
+}
+
+void host1x_client_iommu_detach(struct host1x_client *client,
+ struct iommu_group *group)
+{
+ struct drm_device *drm = dev_get_drvdata(client->parent);
+ struct tegra_drm *tegra = drm->dev_private;
+
+ if (group) {
+ if (group == tegra->group) {
+ iommu_detach_group(tegra->domain, group);
+ tegra->group = NULL;
+ }
+
+ iommu_group_put(group);
+ }
+}
+
void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *dma)
{
struct iova *alloc;
--- a/drivers/gpu/drm/tegra/drm.h
+++ b/drivers/gpu/drm/tegra/drm.h
@@ -110,6 +110,10 @@ int tegra_drm_register_client(struct teg
struct tegra_drm_client *client);
int tegra_drm_unregister_client(struct tegra_drm *tegra,
struct tegra_drm_client *client);
+struct iommu_group *host1x_client_iommu_attach(struct host1x_client *client,
+ bool shared);
+void host1x_client_iommu_detach(struct host1x_client *client,
+ struct iommu_group *group);
int tegra_drm_init(struct tegra_drm *tegra, struct drm_device *drm);
int tegra_drm_exit(struct tegra_drm *tegra);
--- a/drivers/gpu/drm/tegra/gr2d.c
+++ b/drivers/gpu/drm/tegra/gr2d.c
@@ -32,7 +32,6 @@ static int gr2d_init(struct host1x_clien
struct tegra_drm_client *drm = host1x_to_drm_client(client);
struct drm_device *dev = dev_get_drvdata(client->parent);
unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
- struct tegra_drm *tegra = dev->dev_private;
struct gr2d *gr2d = to_gr2d(drm);
int err;
@@ -47,22 +46,14 @@ static int gr2d_init(struct host1x_clien
goto put;
}
- if (tegra->domain) {
- gr2d->group = iommu_group_get(client->dev);
-
- if (gr2d->group) {
- err = iommu_attach_group(tegra->domain, gr2d->group);
- if (err < 0) {
- dev_err(client->dev,
- "failed to attach to domain: %d\n",
- err);
- iommu_group_put(gr2d->group);
- goto free;
- }
- }
+ gr2d->group = host1x_client_iommu_attach(client, false);
+ if (IS_ERR(gr2d->group)) {
+ err = PTR_ERR(gr2d->group);
+ dev_err(client->dev, "failed to attach to domain: %d\n", err);
+ goto free;
}
- err = tegra_drm_register_client(tegra, drm);
+ err = tegra_drm_register_client(dev->dev_private, drm);
if (err < 0) {
dev_err(client->dev, "failed to register client: %d\n", err);
goto detach;
@@ -71,10 +62,7 @@ static int gr2d_init(struct host1x_clien
return 0;
detach:
- if (gr2d->group) {
- iommu_detach_group(tegra->domain, gr2d->group);
- iommu_group_put(gr2d->group);
- }
+ host1x_client_iommu_detach(client, gr2d->group);
free:
host1x_syncpt_free(client->syncpts[0]);
put:
@@ -94,14 +82,10 @@ static int gr2d_exit(struct host1x_clien
if (err < 0)
return err;
+ host1x_client_iommu_detach(client, gr2d->group);
host1x_syncpt_free(client->syncpts[0]);
host1x_channel_put(gr2d->channel);
- if (gr2d->group) {
- iommu_detach_group(tegra->domain, gr2d->group);
- iommu_group_put(gr2d->group);
- }
-
return 0;
}
--- a/drivers/gpu/drm/tegra/gr3d.c
+++ b/drivers/gpu/drm/tegra/gr3d.c
@@ -42,7 +42,6 @@ static int gr3d_init(struct host1x_clien
struct tegra_drm_client *drm = host1x_to_drm_client(client);
struct drm_device *dev = dev_get_drvdata(client->parent);
unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
- struct tegra_drm *tegra = dev->dev_private;
struct gr3d *gr3d = to_gr3d(drm);
int err;
@@ -57,19 +56,11 @@ static int gr3d_init(struct host1x_clien
goto put;
}
- if (tegra->domain) {
- gr3d->group = iommu_group_get(client->dev);
-
- if (gr3d->group) {
- err = iommu_attach_group(tegra->domain, gr3d->group);
- if (err < 0) {
- dev_err(client->dev,
- "failed to attach to domain: %d\n",
- err);
- iommu_group_put(gr3d->group);
- goto free;
- }
- }
+ gr3d->group = host1x_client_iommu_attach(client, false);
+ if (IS_ERR(gr3d->group)) {
+ err = PTR_ERR(gr3d->group);
+ dev_err(client->dev, "failed to attach to domain: %d\n", err);
+ goto free;
}
err = tegra_drm_register_client(dev->dev_private, drm);
@@ -81,10 +72,7 @@ static int gr3d_init(struct host1x_clien
return 0;
detach:
- if (gr3d->group) {
- iommu_detach_group(tegra->domain, gr3d->group);
- iommu_group_put(gr3d->group);
- }
+ host1x_client_iommu_detach(client, gr3d->group);
free:
host1x_syncpt_free(client->syncpts[0]);
put:
@@ -96,7 +84,6 @@ static int gr3d_exit(struct host1x_clien
{
struct tegra_drm_client *drm = host1x_to_drm_client(client);
struct drm_device *dev = dev_get_drvdata(client->parent);
- struct tegra_drm *tegra = dev->dev_private;
struct gr3d *gr3d = to_gr3d(drm);
int err;
@@ -104,14 +91,10 @@ static int gr3d_exit(struct host1x_clien
if (err < 0)
return err;
+ host1x_client_iommu_detach(client, gr3d->group);
host1x_syncpt_free(client->syncpts[0]);
host1x_channel_put(gr3d->channel);
- if (gr3d->group) {
- iommu_detach_group(tegra->domain, gr3d->group);
- iommu_group_put(gr3d->group);
- }
-
return 0;
}