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Suman Anna is adding remoteproc support for processors not behind IOMMUs. 

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Merge tag 'remoteproc-4.1-next' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc

Pull remoteproc update from Ohad Ben-Cohen:
 "Suman Anna is adding remoteproc support for processors not behind
  IOMMUs"

* tag 'remoteproc-4.1-next' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc:
  remoteproc: add IOMMU hardware capability flag
This commit is contained in:
Linus Torvalds 2015-04-20 15:40:10 -07:00
parent 8f49309a26 315491e5d6
commit 646da63172
5 changed files with 8 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/remoteproc/da8xx_remoteproc.c
View File

@ -224,6 +224,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
drproc = rproc->priv;
drproc->rproc = rproc;
rproc->has_iommu = false;
platform_set_drvdata(pdev, rproc);

2
drivers/remoteproc/omap_remoteproc.c
View File

@ -202,6 +202,8 @@ static int omap_rproc_probe(struct platform_device *pdev)
oproc = rproc->priv;
oproc->rproc = rproc;
/* All existing OMAP IPU and DSP processors have an MMU */
rproc->has_iommu = true;
platform_set_drvdata(pdev, rproc);

15
drivers/remoteproc/remoteproc_core.c
View File

@ -94,19 +94,8 @@ static int rproc_enable_iommu(struct rproc *rproc)
struct device *dev = rproc->dev.parent;
int ret;
/*
* We currently use iommu_present() to decide if an IOMMU
* setup is needed.
*
* This works for simple cases, but will easily fail with
* platforms that do have an IOMMU, but not for this specific
* rproc.
*
* This will be easily solved by introducing hw capabilities
* that will be set by the remoteproc driver.
*/
if (!iommu_present(dev->bus)) {
dev_dbg(dev, "iommu not found\n");
if (!rproc->has_iommu) {
dev_dbg(dev, "iommu not present\n");
return 0;
}

1
drivers/remoteproc/ste_modem_rproc.c
View File

@ -289,6 +289,7 @@ static int sproc_probe(struct platform_device *pdev)
sproc = rproc->priv;
sproc->mdev = mdev;
sproc->rproc = rproc;
rproc->has_iommu = false;
mdev->drv_data = sproc;
/* Provide callback functions to modem device */

2
include/linux/remoteproc.h
View File

@ -404,6 +404,7 @@ enum rproc_crash_type {
* @table_ptr: pointer to the resource table in effect
* @cached_table: copy of the resource table
* @table_csum: checksum of the resource table
* @has_iommu: flag to indicate if remote processor is behind an MMU
*/
struct rproc {
struct klist_node node;
@ -435,6 +436,7 @@ struct rproc {
struct resource_table *table_ptr;
struct resource_table *cached_table;
u32 table_csum;
bool has_iommu;
};
/* we currently support only two vrings per rvdev */