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irqchip/gic-v3-its: Add its_vlpi_map helpers

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Obtaining the mapping information for a VLPI is something quite common,
and the GICv4.1 code is going to make even more use of it. Expose it as
a separate set of helpers.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Link: https://lore.kernel.org/r/20191027144234.8395-8-maz@kernel.org
Link: https://lore.kernel.org/r/20191108165805.3071-8-maz@kernel.org
This commit is contained in:
Marc Zyngier 2019-11-08 16:58:01 +00:00
parent 576a834297
commit c1d4d5cd20
1 changed files with 32 additions and 15 deletions
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47
drivers/irqchip/irq-gic-v3-its.c
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@ -207,6 +207,15 @@ static struct its_collection *dev_event_to_col(struct its_device *its_dev,
return its->collections + its_dev->event_map.col_map[event];
}
static struct its_vlpi_map *dev_event_to_vlpi_map(struct its_device *its_dev,
u32 event)
{
if (WARN_ON_ONCE(event >= its_dev->event_map.nr_lpis))
return NULL;
return &its_dev->event_map.vlpi_maps[event];
}
static struct its_collection *irq_to_col(struct irq_data *d)
{
struct its_device *its_dev = irq_data_get_irq_chip_data(d);
@ -971,7 +980,7 @@ static void its_send_invall(struct its_node *its, struct its_collection *col)
static void its_send_vmapti(struct its_device *dev, u32 id)
{
struct its_vlpi_map *map = &dev->event_map.vlpi_maps[id];
struct its_vlpi_map *map = dev_event_to_vlpi_map(dev, id);
struct its_cmd_desc desc;
desc.its_vmapti_cmd.vpe = map->vpe;
@ -985,7 +994,7 @@ static void its_send_vmapti(struct its_device *dev, u32 id)
static void its_send_vmovi(struct its_device *dev, u32 id)
{
struct its_vlpi_map *map = &dev->event_map.vlpi_maps[id];
struct its_vlpi_map *map = dev_event_to_vlpi_map(dev, id);
struct its_cmd_desc desc;
desc.its_vmovi_cmd.vpe = map->vpe;
@ -1063,20 +1072,26 @@ static void its_send_vinvall(struct its_node *its, struct its_vpe *vpe)
/*
* irqchip functions - assumes MSI, mostly.
*/
static struct its_vlpi_map *get_vlpi_map(struct irq_data *d)
{
struct its_device *its_dev = irq_data_get_irq_chip_data(d);
u32 event = its_get_event_id(d);
if (!irqd_is_forwarded_to_vcpu(d))
return NULL;
return dev_event_to_vlpi_map(its_dev, event);
}
static void lpi_write_config(struct irq_data *d, u8 clr, u8 set)
{
struct its_vlpi_map *map = get_vlpi_map(d);
irq_hw_number_t hwirq;
void *va;
u8 *cfg;
if (irqd_is_forwarded_to_vcpu(d)) {
struct its_device *its_dev = irq_data_get_irq_chip_data(d);
u32 event = its_get_event_id(d);
struct its_vlpi_map *map;
va = page_address(its_dev->event_map.vm->vprop_page);
map = &its_dev->event_map.vlpi_maps[event];
if (map) {
va = page_address(map->vm->vprop_page);
hwirq = map->vintid;
/* Remember the updated property */
@ -1136,11 +1151,14 @@ static void its_vlpi_set_doorbell(struct irq_data *d, bool enable)
{
struct its_device *its_dev = irq_data_get_irq_chip_data(d);
u32 event = its_get_event_id(d);
struct its_vlpi_map *map;
if (its_dev->event_map.vlpi_maps[event].db_enabled == enable)
map = dev_event_to_vlpi_map(its_dev, event);
if (map->db_enabled == enable)
return;
its_dev->event_map.vlpi_maps[event].db_enabled = enable;
map->db_enabled = enable;
/*
* More fun with the architecture:
@ -1369,19 +1387,18 @@ out:
static int its_vlpi_get(struct irq_data *d, struct its_cmd_info *info)
{
struct its_device *its_dev = irq_data_get_irq_chip_data(d);
u32 event = its_get_event_id(d);
struct its_vlpi_map *map = get_vlpi_map(d);
int ret = 0;
mutex_lock(&its_dev->event_map.vlpi_lock);
if (!its_dev->event_map.vm ||
!its_dev->event_map.vlpi_maps[event].vm) {
if (!its_dev->event_map.vm || !map->vm) {
ret = -EINVAL;
goto out;
}
/* Copy our mapping information to the incoming request */
*info->map = its_dev->event_map.vlpi_maps[event];
*info->map = *map;
out:
mutex_unlock(&its_dev->event_map.vlpi_lock);