Messages in this thread Patch in this message | | | From | Yang Yingliang <> | Subject | [PATCH v2 3/4] irqchip/mbigen: add support for a MBIGEN generating SPIs | Date | Fri, 26 Oct 2018 15:51:19 +0800 |
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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(-)
diff --git a/drivers/irqchip/irq-mbigen.c b/drivers/irqchip/irq-mbigen.c index f05998f..72db969 100644 --- a/drivers/irqchip/irq-mbigen.c +++ b/drivers/irqchip/irq-mbigen.c @@ -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]; -- 1.8.3
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