From 8d85dcedc4663f7cee840fbdd27f0204e3989ea2 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Mon, 19 Dec 2016 18:02:13 +0000 Subject: [PATCH] irqchip/gic-v3-its: Implement irq_set_irqchip_state for pending state Allow the pending state of an LPI to be set or cleared via irq_set_irqchip_state. Reviewed-by: Thomas Gleixner Reviewed-by: Eric Auger Signed-off-by: Marc Zyngier --- 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 7ad0fc8d2e23..6a33cdb63636 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -164,6 +164,11 @@ struct its_cmd_desc { u32 event_id; } its_inv_cmd; + struct { + struct its_device *dev; + u32 event_id; + } its_clear_cmd; + struct { struct its_device *dev; u32 event_id; @@ -380,6 +385,40 @@ 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) { @@ -542,6 +581,26 @@ static void its_build_sync_cmd(struct its_cmd_block *sync_cmd, static BUILD_SINGLE_CMD_FUNC(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; @@ -708,6 +767,24 @@ 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, @@ -715,6 +792,7 @@ 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, }; /* -- 2.20.1