On Fri, Jan 10, 2020 at 03:54:07PM +0100, 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/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
>
Please replace the if (cond) report_abort(...)'s with assert_msg(cond, ...)'s.
Thanks,
drew
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