From: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
Add support for up to 4 contexts. Each context is mapped
to one domain. One domain is associated with each device,
however one or more uTLBs for a single device are kept
in the same domain.
Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
---
drivers/iommu/ipmmu-vmsa.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
--- 0015/drivers/iommu/ipmmu-vmsa.c
+++ work/drivers/iommu/ipmmu-vmsa.c 2016-03-18 00:15:49.180513000 +0900
@@ -31,7 +31,7 @@
#include "io-pgtable.h"
-#define IPMMU_CTX_MAX 1
+#define IPMMU_CTX_MAX 4
struct ipmmu_vmsa_device {
struct device *dev;
@@ -536,6 +536,13 @@ static int ipmmu_attach_device(struct io
/* The domain hasn't been used yet, initialize it. */
domain->mmu = mmu;
ret = ipmmu_domain_init_context(domain);
+ if (ret < 0) {
+ dev_err(dev, "Unable to initialize IPMMU context\n");
+ domain->mmu = NULL;
+ } else {
+ dev_info(dev, "Using IPMMU context %u\n",
+ domain->context_id);
+ }
} else if (domain->mmu != mmu) {
/*
* Something is wrong, we can't attach two devices using
@@ -915,7 +922,7 @@ static void ipmmu_device_reset(struct ip
unsigned int i;
/* Disable all contexts. */
- for (i = 0; i < 4; ++i)
+ for (i = 0; i < IPMMU_CTX_MAX; ++i)
ipmmu_write(mmu, i * IM_CTX_SIZE + IMCTR, 0);
}
