Hi Zenghui,
On 2/7/20 6:41 AM, Zenghui Yu wrote:
> Hi Eric,
>
> On 2020/1/28 18:34, Eric Auger wrote:
>> 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/report_abort/assert
>>
>> v1 -> v2:
>> - s/nb_/nr_
>> ---
>> lib/arm/asm/gic-v3-its.h | 20 +++++++++++++++++-
>> lib/arm/gic-v3-its.c | 44 ++++++++++++++++++++++++++++++++++++++++
>> 2 files changed, 63 insertions(+), 1 deletion(-)
>>
>> diff --git a/lib/arm/asm/gic-v3-its.h b/lib/arm/asm/gic-v3-its.h
>> index fe73c04..acd97a9 100644
>> --- a/lib/arm/asm/gic-v3-its.h
>> +++ b/lib/arm/asm/gic-v3-its.h
>> @@ -31,6 +31,19 @@ struct its_baser {
>> };
>> #define GITS_BASER_NR_REGS 8
>> +#define GITS_MAX_DEVICES 8
>> +#define GITS_MAX_COLLECTIONS 8
>> +
>> +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;
>> @@ -38,6 +51,10 @@ struct its_data {
>> 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;
>> @@ -90,7 +107,6 @@ 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];
>> };
>> @@ -100,6 +116,8 @@ 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);
>> +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);
>> #else /* __arm__ */
>> diff --git a/lib/arm/gic-v3-its.c b/lib/arm/gic-v3-its.c
>> index d1e7e52..c2dcd01 100644
>> --- a/lib/arm/gic-v3-its.c
>> +++ b/lib/arm/gic-v3-its.c
>> @@ -175,3 +175,47 @@ 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;
>> +
>> + assert(its_data.nr_devices < GITS_MAX_DEVICES);
>> +
>
>
>> + baser = its_lookup_baser(GITS_BASER_TYPE_DEVICE);
>> + if (!baser)
>> + return NULL;
>
> I think there's no need to lookup the device baser here. As the
> device baser should have already been setup at initialization
> time (i.e. in its_enable_defaults). And anyway, 'baser' is not
> being used in this function.
I fully agree. I Removed that.
Thanks!
Eric
>
>
> Thanks,
> Zenghui
>
>> +
>> + 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;
>> +
>> + assert(its_data.nr_collections < GITS_MAX_COLLECTIONS);
>> +
>> + 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;
>> +}
>>
>
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