On 17/01/2017 11:20, Marc Zyngier wrote:
> Allow the pending state of an LPI to be set or cleared via
> irq_set_irqchip_state.
>
> Signed-off-by: Marc Zyngier <marc.zyng...@arm.com>
Reviewed-by: Eric Auger <eric.au...@redhat.com>
Eric
> ---
> drivers/irqchip/irq-gic-v3-its.c | 78
> ++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 78 insertions(+)
>
> diff --git a/drivers/irqchip/irq-gic-v3-its.c
> b/drivers/irqchip/irq-gic-v3-its.c
> index 520b764..b28fb19 100644
> --- a/drivers/irqchip/irq-gic-v3-its.c
> +++ b/drivers/irqchip/irq-gic-v3-its.c
> @@ -163,6 +163,11 @@ struct its_cmd_desc {
> struct {
> struct its_device *dev;
> u32 event_id;
> + } its_clear_cmd;
> +
> + struct {
> + struct its_device *dev;
> + u32 event_id;
> } its_int_cmd;
>
> struct {
> @@ -376,6 +381,40 @@ static struct its_collection *its_build_inv_cmd(struct
> its_cmd_block *cmd,
> return col;
> }
>
> +static struct its_collection *its_build_int_cmd(struct its_cmd_block *cmd,
> + struct its_cmd_desc *desc)
> +{
> + struct its_collection *col;
> +
> + col = dev_event_to_col(desc->its_int_cmd.dev,
> + desc->its_int_cmd.event_id);
> +
> + its_encode_cmd(cmd, GITS_CMD_INT);
> + its_encode_devid(cmd, desc->its_int_cmd.dev->device_id);
> + its_encode_event_id(cmd, desc->its_int_cmd.event_id);
> +
> + its_fixup_cmd(cmd);
> +
> + return col;
> +}
> +
> +static struct its_collection *its_build_clear_cmd(struct its_cmd_block *cmd,
> + struct its_cmd_desc *desc)
> +{
> + struct its_collection *col;
> +
> + col = dev_event_to_col(desc->its_clear_cmd.dev,
> + desc->its_clear_cmd.event_id);
> +
> + its_encode_cmd(cmd, GITS_CMD_CLEAR);
> + its_encode_devid(cmd, desc->its_clear_cmd.dev->device_id);
> + its_encode_event_id(cmd, desc->its_clear_cmd.event_id);
> +
> + its_fixup_cmd(cmd);
> +
> + return col;
> +}
> +
> static struct its_collection *its_build_invall_cmd(struct its_cmd_block *cmd,
> struct its_cmd_desc *desc)
> {
> @@ -530,6 +569,26 @@ static void its_build_sync_cmd(struct its_cmd_block
> *sync_cmd,
> static __its_send_single_cmd(its_send_single_command, its_cmd_builder_t,
> struct its_collection, its_build_sync_cmd)
>
> +static void its_send_int(struct its_device *dev, u32 event_id)
> +{
> + struct its_cmd_desc desc;
> +
> + desc.its_int_cmd.dev = dev;
> + desc.its_int_cmd.event_id = event_id;
> +
> + its_send_single_command(dev->its, its_build_int_cmd, &desc);
> +}
> +
> +static void its_send_clear(struct its_device *dev, u32 event_id)
> +{
> + struct its_cmd_desc desc;
> +
> + desc.its_clear_cmd.dev = dev;
> + desc.its_clear_cmd.event_id = event_id;
> +
> + its_send_single_command(dev->its, its_build_clear_cmd, &desc);
> +}
> +
> static void its_send_inv(struct its_device *dev, u32 event_id)
> {
> struct its_cmd_desc desc;
> @@ -693,6 +752,24 @@ static void its_irq_compose_msi_msg(struct irq_data *d,
> struct msi_msg *msg)
> iommu_dma_map_msi_msg(d->irq, msg);
> }
>
> +static int its_irq_set_irqchip_state(struct irq_data *d,
> + enum irqchip_irq_state which,
> + bool state)
> +{
> + struct its_device *its_dev = irq_data_get_irq_chip_data(d);
> + u32 event = its_get_event_id(d);
> +
> + if (which != IRQCHIP_STATE_PENDING)
> + return -EINVAL;
> +
> + if (state)
> + its_send_int(its_dev, event);
> + else
> + its_send_clear(its_dev, event);
> +
> + return 0;
> +}
> +
> static struct irq_chip its_irq_chip = {
> .name = "ITS",
> .irq_mask = its_mask_irq,
> @@ -700,6 +777,7 @@ static struct irq_chip its_irq_chip = {
> .irq_eoi = irq_chip_eoi_parent,
> .irq_set_affinity = its_set_affinity,
> .irq_compose_msi_msg = its_irq_compose_msi_msg,
> + .irq_set_irqchip_state = its_irq_set_irqchip_state,
> };
>
> /*
>
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