aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/iommu
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/arm-smmu-impl.c44
-rw-r--r--drivers/iommu/arm-smmu.c97
-rw-r--r--drivers/iommu/arm-smmu.h72
3 files changed, 114 insertions, 99 deletions
diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
index efeb6d78da17..0657c85580cb 100644
--- a/drivers/iommu/arm-smmu-impl.c
+++ b/drivers/iommu/arm-smmu-impl.c
@@ -4,10 +4,54 @@
#define pr_fmt(fmt) "arm-smmu: " fmt
+#include <linux/of.h>
+
#include "arm-smmu.h"
+static int arm_smmu_gr0_ns(int offset)
+{
+ switch(offset) {
+ case ARM_SMMU_GR0_sCR0:
+ case ARM_SMMU_GR0_sACR:
+ case ARM_SMMU_GR0_sGFSR:
+ case ARM_SMMU_GR0_sGFSYNR0:
+ case ARM_SMMU_GR0_sGFSYNR1:
+ case ARM_SMMU_GR0_sGFSYNR2:
+ return offset + 0x400;
+ default:
+ return offset;
+ }
+}
+
+static u32 arm_smmu_read_ns(struct arm_smmu_device *smmu, int page,
+ int offset)
+{
+ if (page == ARM_SMMU_GR0)
+ offset = arm_smmu_gr0_ns(offset);
+ return readl_relaxed(arm_smmu_page(smmu, page) + offset);
+}
+
+static void arm_smmu_write_ns(struct arm_smmu_device *smmu, int page,
+ int offset, u32 val)
+{
+ if (page == ARM_SMMU_GR0)
+ offset = arm_smmu_gr0_ns(offset);
+ writel_relaxed(val, arm_smmu_page(smmu, page) + offset);
+}
+
+/* Since we don't care for sGFAR, we can do without 64-bit accessors */
+const struct arm_smmu_impl calxeda_impl = {
+ .read_reg = arm_smmu_read_ns,
+ .write_reg = arm_smmu_write_ns,
+};
+
+
struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
{
+ if (of_property_read_bool(smmu->dev->of_node,
+ "calxeda,smmu-secure-config-access"))
+ smmu->impl = &calxeda_impl;
+
return smmu;
}
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 1e8153182830..432d781f05f3 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -155,91 +155,10 @@ struct arm_smmu_domain {
struct iommu_domain domain;
};
-static int arm_smmu_gr0_ns(int offset)
-{
- switch(offset) {
- case ARM_SMMU_GR0_sCR0:
- case ARM_SMMU_GR0_sACR:
- case ARM_SMMU_GR0_sGFSR:
- case ARM_SMMU_GR0_sGFSYNR0:
- case ARM_SMMU_GR0_sGFSYNR1:
- case ARM_SMMU_GR0_sGFSYNR2:
- return offset + 0x400;
- default:
- return offset;
- }
-}
-
-static void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n)
-{
- return smmu->base + (n << smmu->pgshift);
-}
-
-static u32 arm_smmu_readl(struct arm_smmu_device *smmu, int page, int offset)
-{
- if ((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) && page == 0)
- offset = arm_smmu_gr0_ns(offset);
-
- return readl_relaxed(arm_smmu_page(smmu, page) + offset);
-}
-
-static void arm_smmu_writel(struct arm_smmu_device *smmu, int page, int offset,
- u32 val)
-{
- if ((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) && page == 0)
- offset = arm_smmu_gr0_ns(offset);
-
- writel_relaxed(val, arm_smmu_page(smmu, page) + offset);
-}
-
-static u64 arm_smmu_readq(struct arm_smmu_device *smmu, int page, int offset)
-{
- return readq_relaxed(arm_smmu_page(smmu, page) + offset);
-}
-
-static void arm_smmu_writeq(struct arm_smmu_device *smmu, int page, int offset,
- u64 val)
-{
- writeq_relaxed(val, arm_smmu_page(smmu, page) + offset);
-}
-
-#define ARM_SMMU_GR0 0
-#define ARM_SMMU_GR1 1
-#define ARM_SMMU_CB(s, n) ((s)->numpage + (n))
-
-#define arm_smmu_gr0_read(s, o) \
- arm_smmu_readl((s), ARM_SMMU_GR0, (o))
-#define arm_smmu_gr0_write(s, o, v) \
- arm_smmu_writel((s), ARM_SMMU_GR0, (o), (v))
-
-#define arm_smmu_gr1_read(s, o) \
- arm_smmu_readl((s), ARM_SMMU_GR1, (o))
-#define arm_smmu_gr1_write(s, o, v) \
- arm_smmu_writel((s), ARM_SMMU_GR1, (o), (v))
-
-#define arm_smmu_cb_read(s, n, o) \
- arm_smmu_readl((s), ARM_SMMU_CB((s), (n)), (o))
-#define arm_smmu_cb_write(s, n, o, v) \
- arm_smmu_writel((s), ARM_SMMU_CB((s), (n)), (o), (v))
-#define arm_smmu_cb_readq(s, n, o) \
- arm_smmu_readq((s), ARM_SMMU_CB((s), (n)), (o))
-#define arm_smmu_cb_writeq(s, n, o, v) \
- arm_smmu_writeq((s), ARM_SMMU_CB((s), (n)), (o), (v))
-
-struct arm_smmu_option_prop {
- u32 opt;
- const char *prop;
-};
-
static atomic_t cavium_smmu_context_count = ATOMIC_INIT(0);
static bool using_legacy_binding, using_generic_binding;
-static struct arm_smmu_option_prop arm_smmu_options[] = {
- { ARM_SMMU_OPT_SECURE_CFG_ACCESS, "calxeda,smmu-secure-config-access" },
- { 0, NULL},
-};
-
static inline int arm_smmu_rpm_get(struct arm_smmu_device *smmu)
{
if (pm_runtime_enabled(smmu->dev))
@@ -259,20 +178,6 @@ static struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom)
return container_of(dom, struct arm_smmu_domain, domain);
}
-static void parse_driver_options(struct arm_smmu_device *smmu)
-{
- int i = 0;
-
- do {
- if (of_property_read_bool(smmu->dev->of_node,
- arm_smmu_options[i].prop)) {
- smmu->options |= arm_smmu_options[i].opt;
- dev_notice(smmu->dev, "option %s\n",
- arm_smmu_options[i].prop);
- }
- } while (arm_smmu_options[++i].opt);
-}
-
static struct device_node *dev_get_dev_node(struct device *dev)
{
if (dev_is_pci(dev)) {
@@ -2091,8 +1996,6 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev,
smmu->version = data->version;
smmu->model = data->model;
- parse_driver_options(smmu);
-
legacy_binding = of_find_property(dev->of_node, "mmu-masters", NULL);
if (legacy_binding && !using_generic_binding) {
if (!using_legacy_binding)
diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h
index 6fea0b0b7e51..d4fd29d70705 100644
--- a/drivers/iommu/arm-smmu.h
+++ b/drivers/iommu/arm-smmu.h
@@ -242,10 +242,9 @@ struct arm_smmu_device {
#define ARM_SMMU_FEAT_EXIDS (1 << 12)
u32 features;
-#define ARM_SMMU_OPT_SECURE_CFG_ACCESS (1 << 0)
- u32 options;
enum arm_smmu_arch_version version;
enum arm_smmu_implementation model;
+ const struct arm_smmu_impl *impl;
u32 num_context_banks;
u32 num_s2_context_banks;
@@ -281,6 +280,75 @@ struct arm_smmu_device {
/* Implementation details, yay! */
+struct arm_smmu_impl {
+ u32 (*read_reg)(struct arm_smmu_device *smmu, int page, int offset);
+ void (*write_reg)(struct arm_smmu_device *smmu, int page, int offset,
+ u32 val);
+ u64 (*read_reg64)(struct arm_smmu_device *smmu, int page, int offset);
+ void (*write_reg64)(struct arm_smmu_device *smmu, int page, int offset,
+ u64 val);
+};
+
+static inline void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n)
+{
+ return smmu->base + (n << smmu->pgshift);
+}
+
+static inline u32 arm_smmu_readl(struct arm_smmu_device *smmu, int page, int offset)
+{
+ if (smmu->impl && unlikely(smmu->impl->read_reg))
+ return smmu->impl->read_reg(smmu, page, offset);
+ return readl_relaxed(arm_smmu_page(smmu, page) + offset);
+}
+
+static inline void arm_smmu_writel(struct arm_smmu_device *smmu, int page,
+ int offset, u32 val)
+{
+ if (smmu->impl && unlikely(smmu->impl->write_reg))
+ smmu->impl->write_reg(smmu, page, offset, val);
+ else
+ writel_relaxed(val, arm_smmu_page(smmu, page) + offset);
+}
+
+static inline u64 arm_smmu_readq(struct arm_smmu_device *smmu, int page, int offset)
+{
+ if (smmu->impl && unlikely(smmu->impl->read_reg64))
+ return smmu->impl->read_reg64(smmu, page, offset);
+ return readq_relaxed(arm_smmu_page(smmu, page) + offset);
+}
+
+static inline void arm_smmu_writeq(struct arm_smmu_device *smmu, int page,
+ int offset, u64 val)
+{
+ if (smmu->impl && unlikely(smmu->impl->write_reg64))
+ smmu->impl->write_reg64(smmu, page, offset, val);
+ else
+ writeq_relaxed(val, arm_smmu_page(smmu, page) + offset);
+}
+
+#define ARM_SMMU_GR0 0
+#define ARM_SMMU_GR1 1
+#define ARM_SMMU_CB(s, n) ((s)->numpage + (n))
+
+#define arm_smmu_gr0_read(s, o) \
+ arm_smmu_readl((s), ARM_SMMU_GR0, (o))
+#define arm_smmu_gr0_write(s, o, v) \
+ arm_smmu_writel((s), ARM_SMMU_GR0, (o), (v))
+
+#define arm_smmu_gr1_read(s, o) \
+ arm_smmu_readl((s), ARM_SMMU_GR1, (o))
+#define arm_smmu_gr1_write(s, o, v) \
+ arm_smmu_writel((s), ARM_SMMU_GR1, (o), (v))
+
+#define arm_smmu_cb_read(s, n, o) \
+ arm_smmu_readl((s), ARM_SMMU_CB((s), (n)), (o))
+#define arm_smmu_cb_write(s, n, o, v) \
+ arm_smmu_writel((s), ARM_SMMU_CB((s), (n)), (o), (v))
+#define arm_smmu_cb_readq(s, n, o) \
+ arm_smmu_readq((s), ARM_SMMU_CB((s), (n)), (o))
+#define arm_smmu_cb_writeq(s, n, o, v) \
+ arm_smmu_writeq((s), ARM_SMMU_CB((s), (n)), (o), (v))
+
struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu);
#endif /* _ARM_SMMU_H */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.