Messages in this thread | | | Subject | Re: [PATCH v3 1/2] PCI: Add tango MSI controller support | From | Mason <> | Date | Wed, 29 Mar 2017 17:50:52 +0200 |
| |
On 29/03/2017 15:16, Mason wrote:
> But I don't understand how to get my pcie pointer back in irq_ack > or irq_unmask, or the relevant msi. Can you throw me a clue?
Let's see... the irq_chip call-backs receive an irq_data pointer.
struct irq_data - per irq chip data passed down to chip functions struct irq_chip - hardware interrupt chip descriptor
irq_data contains a void *chip_data member. Can I use chip_data to stash a struct tango_pcie pointer?
/** * irq_set_chip_data - set irq chip data for an irq * @irq: Interrupt number * @data: Pointer to chip specific data * * Set the hardware irq chip data for an irq */ int irq_set_chip_data(unsigned int irq, void *data)
But where would I call it? And for which irq?
Otherwise, I found by trial-and-error that I can reach pcie through
data->domain->parent->host_data
data->domain == msi_dom msi_dom->parent == irq_dom irq_dom->host_data == pcie
But data->irq and data->hwirq don't hold the MSI index :-(
I suppose I have to ask for some mapping?
Regards.
| |