On 2023/5/21 下午6:29, WANG Xuerui wrote:
Hi,
On 2023/5/20 14:38, Jianmin Lv wrote:
In a dual-bridge system based ACPI, the IRQ on PCH PIC of
"In an ACPI-based dual-bridge system"?
Also what's "the IRQ on PCH PIC of each bridge", is it "IRQ of each
bridge's PCH PIC"? Or did I misunderstand it?
Thanks for your comment here, I'll change them in next version.
each bridge sent to CPU is always a zero-based number, which
means that the IRQ on PCH PIC of each bridge is mapped into
vector range from 0 to 63 of upstream irqchip(e.g. EIOINTC).
EIOINTC N: [0 ... 63 | 64 ... 255]
-------- ----------
^ ^
| |
PCH PIC N |
PCH MSI N
For example, the IRQ vector number of sata controller on
PCH PIC of each bridge is 16, which is sent to upstream
irqchip of EIOINTC when an interrupt occurs, which will set
bit 16 of EIOINTC. Since hwirq of 16 on EIOINTC has been
mapped to a irq_desc for sata controller during hierarchy
irq allocation, the related mapped IRQ will be found through
irq_resolve_mapping() in the IRQ domain of EIOINTC.
So, the IRQ number set in HT vector register should be fixed
to be a zero-based number.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Jianmin Lv <lvjianmin@xxxxxxxxxxx>
Signed-off-by: liuyun <liuyun@xxxxxxxxxxx>
What's the patch's proper authorship, Yun Liu or you? Based on the
ordering of the tags it seems you should be the author, but Yun should
be submitting (because their tag comes later, the patch should be
flowing from your tree to theirs); otherwise they should be the author
and the two signoff lines should be reversed.
Ok, I'll change them as following:
Co-developed-by: liuyun <liuyun@xxxxxxxxxxx>
Signed-off-by: liuyun <liuyun@xxxxxxxxxxx>
Signed-off-by: Jianmin Lv <lvjianmin@xxxxxxxxxxx>
Thanks.
---
drivers/irqchip/irq-loongson-pch-pic.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/irqchip/irq-loongson-pch-pic.c
b/drivers/irqchip/irq-loongson-pch-pic.c
index e5fe4d50be05..921c5c0190d1 100644
--- a/drivers/irqchip/irq-loongson-pch-pic.c
+++ b/drivers/irqchip/irq-loongson-pch-pic.c
@@ -401,14 +401,12 @@ static int __init acpi_cascade_irqdomain_init(void)
int __init pch_pic_acpi_init(struct irq_domain *parent,
struct acpi_madt_bio_pic *acpi_pchpic)
{
- int ret, vec_base;
+ int ret;
struct fwnode_handle *domain_handle;
if (find_pch_pic(acpi_pchpic->gsi_base) >= 0)
return 0;
- vec_base = acpi_pchpic->gsi_base - GSI_MIN_PCH_IRQ;
-
domain_handle = irq_domain_alloc_fwnode(&acpi_pchpic->address);
if (!domain_handle) {
pr_err("Unable to allocate domain handle\n");
@@ -416,7 +414,7 @@ int __init pch_pic_acpi_init(struct irq_domain
*parent,
}
ret = pch_pic_init(acpi_pchpic->address, acpi_pchpic->size,
- vec_base, parent, domain_handle, acpi_pchpic->gsi_base);
+ 0, parent, domain_handle, acpi_pchpic->gsi_base);
if (ret < 0) {
irq_domain_free_fwnode(domain_handle);
