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Date: Tue, 13 Oct 2015 18:03:23 -0500
From: "J. German Rivera" <German.Rivera@...escale.com>
To: <gregkh@...uxfoundation.org>, <arnd@...db.de>,
<devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>
CC: <stuart.yoder@...escale.com>, <itai.katz@...escale.com>,
<lijun.pan@...escale.com>, <leoli@...escale.com>,
<scottwood@...escale.com>, <agraf@...e.de>,
<bhamciu1@...escale.com>, <R89243@...escale.com>,
<bhupesh.sharma@...escale.com>, <nir.erez@...escale.com>,
<richard.schmitt@...escale.com>, <dan.carpenter@...cle.com>,
"J. German Rivera" <German.Rivera@...escale.com>
Subject: [PATCH 03/12] staging: fsl-mc: dpmcp opening/closing refactoring
Before, we were opening and closing a mc_io's dpmcp object
in fsl_mc_portal_reset(), since that was the only function that was
calling dpmcp MC operations. However, it is better for maintainability
to open the dpmcp object when it gets associated with an mc_io object,
and close it when this association is terminated. This way, we are free
to call dpmcp operations on a mc_io's dpmcp object at any time, without
having to check if the dpmcp object is opened or not.
Consequently, the creation/teardown of the association between
an mc_io object and a dpmcp is no encapsulated in two functions:
fsl_mc_io_set_dpmcp()/fsl_mc_io_unset_dpmcp(). Besides, setting
the corresponding pointers for the association, these functions
open and close the dpmcp object respectively.
---
drivers/staging/fsl-mc/bus/mc-allocator.c | 15 +------
drivers/staging/fsl-mc/bus/mc-sys.c | 67 +++++++++++++++++++++++++++++++
drivers/staging/fsl-mc/include/mc-sys.h | 5 +++
3 files changed, 73 insertions(+), 14 deletions(-)
diff --git a/drivers/staging/fsl-mc/bus/mc-allocator.c b/drivers/staging/fsl-mc/bus/mc-allocator.c
index c3222c6..33f5de4 100644
--- a/drivers/staging/fsl-mc/bus/mc-allocator.c
+++ b/drivers/staging/fsl-mc/bus/mc-allocator.c
@@ -373,30 +373,17 @@ EXPORT_SYMBOL_GPL(fsl_mc_portal_free);
int fsl_mc_portal_reset(struct fsl_mc_io *mc_io)
{
int error;
- u16 token;
struct fsl_mc_device *dpmcp_dev = mc_io->dpmcp_dev;
if (WARN_ON(!dpmcp_dev))
return -EINVAL;
- error = dpmcp_open(mc_io, 0, dpmcp_dev->obj_desc.id, &token);
- if (error < 0) {
- dev_err(&dpmcp_dev->dev, "dpmcp_open() failed: %d\n", error);
- return error;
- }
-
- error = dpmcp_reset(mc_io, 0, token);
+ error = dpmcp_reset(mc_io, 0, dpmcp_dev->mc_handle);
if (error < 0) {
dev_err(&dpmcp_dev->dev, "dpmcp_reset() failed: %d\n", error);
return error;
}
- error = dpmcp_close(mc_io, 0, token);
- if (error < 0) {
- dev_err(&dpmcp_dev->dev, "dpmcp_close() failed: %d\n", error);
- return error;
- }
-
return 0;
}
EXPORT_SYMBOL_GPL(fsl_mc_portal_reset);
diff --git a/drivers/staging/fsl-mc/bus/mc-sys.c b/drivers/staging/fsl-mc/bus/mc-sys.c
index e53acfa..a581d29 100644
--- a/drivers/staging/fsl-mc/bus/mc-sys.c
+++ b/drivers/staging/fsl-mc/bus/mc-sys.c
@@ -75,6 +75,7 @@ int __must_check fsl_create_mc_io(struct device *dev,
struct fsl_mc_device *dpmcp_dev,
u32 flags, struct fsl_mc_io **new_mc_io)
{
+ int error;
struct fsl_mc_io *mc_io;
void __iomem *mc_portal_virt_addr;
struct resource *res;
@@ -111,8 +112,18 @@ int __must_check fsl_create_mc_io(struct device *dev,
}
mc_io->portal_virt_addr = mc_portal_virt_addr;
+ if (dpmcp_dev) {
+ error = fsl_mc_io_set_dpmcp(mc_io, dpmcp_dev);
+ if (error < 0)
+ goto error_destroy_mc_io;
+ }
+
*new_mc_io = mc_io;
return 0;
+
+error_destroy_mc_io:
+ fsl_destroy_mc_io(mc_io);
+ return error;
}
EXPORT_SYMBOL_GPL(fsl_create_mc_io);
@@ -123,6 +134,11 @@ EXPORT_SYMBOL_GPL(fsl_create_mc_io);
*/
void fsl_destroy_mc_io(struct fsl_mc_io *mc_io)
{
+ struct fsl_mc_device *dpmcp_dev = mc_io->dpmcp_dev;
+
+ if (dpmcp_dev)
+ fsl_mc_io_unset_dpmcp(mc_io);
+
devm_iounmap(mc_io->dev, mc_io->portal_virt_addr);
devm_release_mem_region(mc_io->dev,
mc_io->portal_phys_addr,
@@ -138,6 +154,57 @@ void fsl_destroy_mc_io(struct fsl_mc_io *mc_io)
}
EXPORT_SYMBOL_GPL(fsl_destroy_mc_io);
+int fsl_mc_io_set_dpmcp(struct fsl_mc_io *mc_io,
+ struct fsl_mc_device *dpmcp_dev)
+{
+ int error;
+
+ if (WARN_ON(!dpmcp_dev))
+ return -EINVAL;
+
+ if (WARN_ON(mc_io->dpmcp_dev))
+ return -EINVAL;
+
+ if (WARN_ON(dpmcp_dev->mc_io))
+ return -EINVAL;
+
+ error = dpmcp_open(mc_io,
+ 0,
+ dpmcp_dev->obj_desc.id,
+ &dpmcp_dev->mc_handle);
+ if (error < 0)
+ return error;
+
+ mc_io->dpmcp_dev = dpmcp_dev;
+ dpmcp_dev->mc_io = mc_io;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_io_set_dpmcp);
+
+void fsl_mc_io_unset_dpmcp(struct fsl_mc_io *mc_io)
+{
+ int error;
+ struct fsl_mc_device *dpmcp_dev = mc_io->dpmcp_dev;
+
+ if (WARN_ON(!dpmcp_dev))
+ return;
+
+ if (WARN_ON(dpmcp_dev->mc_io != mc_io))
+ return;
+
+ error = dpmcp_close(mc_io,
+ 0,
+ dpmcp_dev->mc_handle);
+ if (error < 0) {
+ dev_err(&dpmcp_dev->dev, "dpmcp_close() failed: %d\n",
+ error);
+ }
+
+ mc_io->dpmcp_dev = NULL;
+ dpmcp_dev->mc_io = NULL;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_io_unset_dpmcp);
+
static int mc_status_to_error(enum mc_cmd_status status)
{
static const int mc_status_to_error_map[] = {
diff --git a/drivers/staging/fsl-mc/include/mc-sys.h b/drivers/staging/fsl-mc/include/mc-sys.h
index bfbecaf..d4fb602 100644
--- a/drivers/staging/fsl-mc/include/mc-sys.h
+++ b/drivers/staging/fsl-mc/include/mc-sys.h
@@ -69,6 +69,11 @@ int __must_check fsl_create_mc_io(struct device *dev,
void fsl_destroy_mc_io(struct fsl_mc_io *mc_io);
+int fsl_mc_io_set_dpmcp(struct fsl_mc_io *mc_io,
+ struct fsl_mc_device *dpmcp_dev);
+
+void fsl_mc_io_unset_dpmcp(struct fsl_mc_io *mc_io);
+
int mc_send_command(struct fsl_mc_io *mc_io, struct mc_command *cmd);
#endif /* _FSL_MC_SYS_H */
--
2.3.3
--
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