From d2f8499153aa78b21881b3ca1fcdc026c3a79079 Mon Sep 17 00:00:00 2001 From: "J. German Rivera" Date: Sat, 17 Oct 2015 11:18:15 -0500 Subject: [PATCH] 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 now 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. Signed-off-by: J. German Rivera Signed-off-by: Greg Kroah-Hartman --- drivers/staging/fsl-mc/bus/mc-allocator.c | 15 +---- drivers/staging/fsl-mc/bus/mc-sys.c | 74 ++++++++++++++++++++--- drivers/staging/fsl-mc/include/mc-sys.h | 5 ++ 3 files changed, 73 insertions(+), 21 deletions(-) diff --git a/drivers/staging/fsl-mc/bus/mc-allocator.c b/drivers/staging/fsl-mc/bus/mc-allocator.c index c3222c6c7e1f..33f5de4f2c67 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 e53acfaa2304..07848a0cbe5a 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; @@ -87,8 +88,6 @@ int __must_check fsl_create_mc_io(struct device *dev, mc_io->flags = flags; mc_io->portal_phys_addr = mc_portal_phys_addr; mc_io->portal_size = mc_portal_size; - mc_io->dpmcp_dev = dpmcp_dev; - dpmcp_dev->mc_io = mc_io; res = devm_request_mem_region(dev, mc_portal_phys_addr, mc_portal_size, @@ -111,8 +110,18 @@ 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); @@ -123,21 +132,72 @@ 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, mc_io->portal_size); mc_io->portal_virt_addr = NULL; - if (mc_io->dpmcp_dev) { - WARN_ON(mc_io->dpmcp_dev->mc_io != mc_io); - mc_io->dpmcp_dev->mc_io = NULL; - } - devm_kfree(mc_io->dev, 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 bfbecafe75d9..d4fb60289df7 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 */ -- 2.20.1