Hi Eric,
On 2020/3/4 22:26, Auger Eric wrote:
Hi Zenghui,
On 2/7/20 4:20 AM, Zenghui Yu wrote:
Hi Eric,
On 2020/1/28 18:34, Eric Auger wrote:
its_enable_defaults() is the top init function that allocates the
command queue and all the requested tables (device, collection,
lpi config and pending tables), enable LPIs at distributor level
and ITS level.
gicv3_enable_defaults must be called before.
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
v2 -> v3:
- introduce its_setup_baser in this patch
- squash "arm/arm64: ITS: Init the command queue" in this patch.
---
lib/arm/asm/gic-v3-its.h | 8 ++++
lib/arm/gic-v3-its.c | 89 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 97 insertions(+)
diff --git a/lib/arm/asm/gic-v3-its.h b/lib/arm/asm/gic-v3-its.h
index 815c515..fe73c04 100644
--- a/lib/arm/asm/gic-v3-its.h
+++ b/lib/arm/asm/gic-v3-its.h
@@ -36,6 +36,8 @@ 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;
};
extern struct its_data its_data;
@@ -88,10 +90,16 @@ extern struct its_data its_data;
#define GITS_BASER_TYPE_DEVICE 1
#define GITS_BASER_TYPE_COLLECTION 4
+
+struct its_cmd_block {
+ u64 raw_cmd[4];
+};
+
extern void its_parse_typer(void);
extern void its_init(void);
extern int its_parse_baser(int i, struct its_baser *baser);
extern struct its_baser *its_lookup_baser(int type);
+extern void its_enable_defaults(void);
#else /* __arm__ */
diff --git a/lib/arm/gic-v3-its.c b/lib/arm/gic-v3-its.c
index 2c0ce13..d1e7e52 100644
--- a/lib/arm/gic-v3-its.c
+++ b/lib/arm/gic-v3-its.c
@@ -86,3 +86,92 @@ void its_init(void)
its_parse_baser(i, &its_data.baser[i]);
}
+static void its_setup_baser(int i, struct its_baser *baser)
+{
+ unsigned long n = (baser->nr_pages * baser->psz) >> PAGE_SHIFT;
+ unsigned long order = is_power_of_2(n) ? fls(n) : fls(n) + 1;
+ u64 val;
+
+ baser->table_addr = (u64)virt_to_phys(alloc_pages(order));
+
+ val = ((u64)baser->table_addr |
+ ((u64)baser->type << GITS_BASER_TYPE_SHIFT) |
+ ((u64)(baser->esz - 1) << GITS_BASER_ENTRY_SIZE_SHIFT) |
+ ((baser->nr_pages - 1) << GITS_BASER_PAGES_SHIFT) |
+ (u64)baser->indirect << 62 |
I haven't seen the 'nr_pages' and 'indirect' are programmed anywhere
except in its_parse_baser(). It looks like they're treated as RO (but
they shouldn't) and I now don't think it makes sense to parse them in
its_parse_baser(), in patch#5.
First of all please forgive me for the delay.
Never mind.
I agree with you on nr_pages. However indirect also indicates the BASER
capability to support or not 2 level tables. So I think it makes sense
to read it on init.
Yes, you're right. As the spec says, the Indirect field "is RAZ/WI for
GIC implementations that only support flat tables".
Thanks,
Zenghui
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