Introduce an helper functions to register
- a new device, characterized by its device id and the
max number of event IDs that dimension its ITT (Interrupt
Translation Table). The function allocates the ITT.
- a new collection, characterized by its ID and the
target processing engine (PE).
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
v2 -> v3:
- s/nb_/nr_
---
lib/arm/asm/gic-v3-its.h | 20 +++++++++++++++++
lib/arm/gic-v3-its.c | 46 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 66 insertions(+)
diff --git a/lib/arm/asm/gic-v3-its.h b/lib/arm/asm/gic-v3-its.h
index 0e31848..0497a78 100644
--- a/lib/arm/asm/gic-v3-its.h
+++ b/lib/arm/asm/gic-v3-its.h
@@ -55,6 +55,9 @@
#define GITS_BASER_TYPE_DEVICE 1
#define GITS_BASER_TYPE_COLLECTION 4
+#define GITS_MAX_DEVICES 8
+#define GITS_MAX_COLLECTIONS 8
+
struct its_typer {
unsigned int ite_size;
unsigned int eventid_bits;
@@ -79,12 +82,27 @@ struct its_cmd_block {
u64 raw_cmd[4];
};
+struct its_device {
+ u32 device_id; /* device ID */
+ u32 nr_ites; /* Max Interrupt Translation Entries */
+ void *itt; /* Interrupt Translation Table GPA */
+};
+
+struct its_collection {
+ u64 target_address;
+ u16 col_id;
+};
+
struct its_data {
void *base;
struct its_typer typer;
struct its_baser baser[GITS_BASER_NR_REGS];
struct its_cmd_block *cmd_base;
struct its_cmd_block *cmd_write;
+ struct its_device devices[GITS_MAX_DEVICES];
+ u32 nr_devices; /* Allocated Devices */
+ struct its_collection collections[GITS_MAX_COLLECTIONS];
+ u32 nr_collections; /* Allocated Collections */
};
extern struct its_data its_data;
@@ -101,6 +119,8 @@ extern u8 get_lpi_config(int n);
extern void set_pending_table_bit(int rdist, int n, bool set);
extern void gicv3_rdist_ctrl_lpi(u32 redist, bool set);
extern void its_enable_defaults(void);
+extern struct its_device *its_create_device(u32 dev_id, int nr_ites);
+extern struct its_collection *its_create_collection(u32 col_id, u32 target_pe);
#endif /* !__ASSEMBLY__ */
#endif /* _ASMARM_GIC_V3_ITS_H_ */
diff --git a/lib/arm/gic-v3-its.c b/lib/arm/gic-v3-its.c
index f488cca..88c08ee 100644
--- a/lib/arm/gic-v3-its.c
+++ b/lib/arm/gic-v3-its.c
@@ -257,3 +257,49 @@ void its_enable_defaults(void)
writel(GITS_CTLR_ENABLE, its_data.base + GITS_CTLR);
}
+
+struct its_device *its_create_device(u32 device_id, int nr_ites)
+{
+ struct its_baser *baser;
+ struct its_device *new;
+ unsigned long n, order;
+
+ if (its_data.nr_devices >= GITS_MAX_DEVICES)
+ report_abort("%s redimension GITS_MAX_DEVICES", __func__);
+
+ baser = its_lookup_baser(GITS_BASER_TYPE_DEVICE);
+ if (!baser)
+ return NULL;
+
+ new = &its_data.devices[its_data.nr_devices];
+
+ new->device_id = device_id;
+ new->nr_ites = nr_ites;
+
+ n = (its_data.typer.ite_size * nr_ites) >> PAGE_SHIFT;
+ order = is_power_of_2(n) ? fls(n) : fls(n) + 1;
+ new->itt = (void *)virt_to_phys(alloc_pages(order));
+
+ its_data.nr_devices++;
+ return new;
+}
+
+struct its_collection *its_create_collection(u32 col_id, u32 pe)
+{
+ struct its_collection *new;
+
+ if (its_data.nr_collections >= GITS_MAX_COLLECTIONS)
+ report_abort("%s redimension GITS_MAX_COLLECTIONS", __func__);
+
+ new = &its_data.collections[its_data.nr_collections];
+
+ new->col_id = col_id;
+
+ if (its_data.typer.pta)
+ new->target_address = (u64)gicv3_data.redist_base[pe];
+ else
+ new->target_address = pe << 16;
+
+ its_data.nr_collections++;
+ return new;
+}
--
2.20.1
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