@@ -48,6 +48,7 @@
#define MBIGEN_NODE_OFFSET 0x1000
/* offset of vector register in mbigen node */
+#define REG_MBIGEN_SPI_VEC_OFFSET 0x500
#define REG_MBIGEN_LPI_VEC_OFFSET 0x200
/**
@@ -62,6 +63,7 @@
* This register is used to configure interrupt
* trigger type
*/
+#define REG_MBIGEN_SPI_TYPE_OFFSET 0x400
#define REG_MBIGEN_LPI_TYPE_OFFSET 0x0
/**
@@ -79,6 +81,9 @@ static inline unsigned int get_mbigen_vec_reg(irq_hw_number_t hwirq)
{
unsigned int nid, pin;
+ if (hwirq < SPI_NUM_PER_MBIGEN_CHIP)
+ return (hwirq * 4 + REG_MBIGEN_SPI_VEC_OFFSET);
+
hwirq -= SPI_NUM_PER_MBIGEN_CHIP;
nid = hwirq / IRQS_PER_MBIGEN_NODE + 1;
pin = hwirq % IRQS_PER_MBIGEN_NODE;
@@ -92,6 +97,13 @@ static inline void get_mbigen_type_reg(irq_hw_number_t hwirq,
{
unsigned int nid, irq_ofst, ofst;
+ if (hwirq < SPI_NUM_PER_MBIGEN_CHIP) {
+ *mask = 1 << (hwirq % 32);
+ ofst = hwirq / 32 * 4;
+ *addr = ofst + REG_MBIGEN_SPI_TYPE_OFFSET;
+ return;
+ }
+
hwirq -= SPI_NUM_PER_MBIGEN_CHIP;
nid = hwirq / IRQS_PER_MBIGEN_NODE + 1;
irq_ofst = hwirq % IRQS_PER_MBIGEN_NODE;
@@ -162,14 +174,22 @@ static void mbigen_write_msg(struct msi_desc *desc, struct msi_msg *msg)
u32 val;
base += get_mbigen_vec_reg(d->hwirq);
+
+ /*
+ * The address of GICD_SETSPI_NSR and GITS_TRANSLATER
+ * is encoded in mbigen register by default. So,we don't
+ * need to program the doorbell address at here.
+ */
+ if (d->hwirq < SPI_NUM_PER_MBIGEN_CHIP) {
+ writel_relaxed(msg->data, base);
+ return;
+ }
+
val = readl_relaxed(base);
val &= ~(IRQ_EVENT_ID_MASK << IRQ_EVENT_ID_SHIFT);
val |= (msg->data << IRQ_EVENT_ID_SHIFT);
- /* The address of doorbell is encoded in mbigen register by default
- * So,we don't need to program the doorbell address at here
- */
writel_relaxed(val, base);
}
@@ -182,8 +202,7 @@ static int mbigen_domain_translate(struct irq_domain *d,
if (fwspec->param_count != 2)
return -EINVAL;
- if ((fwspec->param[0] > MAXIMUM_IRQ_PIN_NUM) ||
- (fwspec->param[0] < SPI_NUM_PER_MBIGEN_CHIP))
+ if (fwspec->param[0] > MAXIMUM_IRQ_PIN_NUM)
return -EINVAL;
else
*hwirq = fwspec->param[0];
Now with 5052875 ("irqchip/gic-v3: Add support for Message Based Interrupts as an MSI controller"), we can support MBIGEN to generate message based SPIs by writing GICD_SETSPIR. The first 64-pins of each MBIGEN chip is used to generate SPIs, and each MBIGEN chip has several MBIGEN nodes, every node has 128 pins for generating LPIs. The total pins are: 64(SPIs) + 128 * node_nr(LPIs). So we can translate the pin index in a unified way in mbigen_domain_translate(). Also Add TYPE and VEC registers that used by generating SPIs, the driver can access them when MBIGEN is used to generate SPIs. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/irqchip/irq-mbigen.c | 29 ++++++++++++++++++++++++----- 1 file changed, 24 insertions(+), 5 deletions(-)