This time I boot with 2 disks in slot. So the IRQ_MASK is set
successfully for 2 ports and left as 0 for another 2 ports.
Ming
========================
May 25 13:00:53 localhost kernel: ahci_setup_port: base now==0xf881c500
May 25 13:00:53 localhost kernel: ahci_setup_port: EXIT
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_CMD 0x0
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_SCR_ERR 0x0
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_IRQ_STAT 0x0
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_IRQ_MASK 0x0
May 25 13:00:53 localhost kernel: ahci_host_init: mmio f881c400
port_mmio f881c580
May 25 13:00:53 localhost kernel: ahci_setup_port: ENTER,
base==0xf881c400, port_idx 1
May 25 13:00:53 localhost kernel: ahci_setup_port: base now==0xf881c580
May 25 13:00:53 localhost kernel: ahci_setup_port: EXIT
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_CMD 0x6
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_SCR_ERR 0x4050000
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_IRQ_STAT 0x0
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_IRQ_MASK
0x7840007f
May 25 13:00:53 localhost kernel: ahci_host_init: mmio f881c400
port_mmio f881c600
May 25 13:00:53 localhost kernel: ahci_setup_port: ENTER,
base==0xf881c400, port_idx 2
May 25 13:00:53 localhost kernel: ahci_setup_port: base now==0xf881c600
May 25 13:00:53 localhost kernel: ahci_setup_port: EXIT
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_CMD 0x0
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_SCR_ERR 0x0
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_IRQ_STAT 0x0
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_IRQ_MASK 0x0
May 25 13:00:53 localhost kernel: ahci_host_init: mmio f881c400
port_mmio f881c680
May 25 13:00:53 localhost kernel: ahci_setup_port: ENTER,
base==0xf881c400, port_idx 3
May 25 13:00:53 localhost kernel: ahci_setup_port: base now==0xf881c680
May 25 13:00:53 localhost kernel: ahci_setup_port: EXIT
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_CMD 0x6
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_SCR_ERR 0x4050000
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_IRQ_STAT 0x0
May 25 13:00:53 localhost kernel: ahci_host_init: PORT_IRQ_MASK
0x7840007f
May 25 13:00:53 localhost kernel: ahci_host_init: HOST_CTL 0x80000000
May 25 13:00:53 localhost kernel: ahci_host_init: HOST_CTL 0x80000002
On Thu, 2006-05-25 at 12:04 -0400, Ming Zhang wrote:
> I added these 2 lines in ahci_host_init()
>
> writel(1 << i, mmio + HOST_IRQ_STAT);
>
> /* set irq mask (enables interrupts) */
> writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
>
> ~~~~~~code i added
> tmp = readl(port_mmio + PORT_IRQ_MASK);
> VPRINTK("PORT_IRQ_MASK 0x%x\n", tmp);
> ~~~~~~~~~~~~~
>
> And I got this dmesg with VPRINTK enabled in libata.h. Does this mean
> that IRQ is not enabled on this port at all?
>
> ACPI: PCI Interrupt 0000:00:1f.2[B] -> GSI 19 (level, low) -> IRQ 19
> ahci 0000:00:1f.2: pcs 0x8f->0x8f
> ahci_host_init: cap 0xc720ff03 port_map 0x0 n_ports 4
> ahci_host_init: mmio f8820400 port_mmio f8820500
> ahci_setup_port: ENTER, base==0xf8820400, port_idx 0
> ahci_setup_port: base now==0xf8820500
> ahci_setup_port: EXIT
> ahci_host_init: PORT_CMD 0x0
> ahci_host_init: PORT_SCR_ERR 0x0
> ahci_host_init: PORT_IRQ_STAT 0x0
> ahci_host_init: PORT_IRQ_MASK 0x0
> ahci_host_init: mmio f8820400 port_mmio f8820580
> ahci_setup_port: ENTER, base==0xf8820400, port_idx 1
> ahci_setup_port: base now==0xf8820580
> ahci_setup_port: EXIT
> ahci_host_init: PORT_CMD 0x0
> ahci_host_init: PORT_SCR_ERR 0x0
> ahci_host_init: PORT_IRQ_STAT 0x0
> ahci_host_init: PORT_IRQ_MASK 0x0
> ...
>
>
> On Thu, 2006-05-25 at 11:14 -0400, Jeff Garzik wrote:
> > Ming Zhang wrote:
> > > I read the whole AHCI but I still could not find out what is the magic
> > > number 0x92. Is this in some Intel doc?
> >
> > AHCI spec only documents generic PCI config registers. Each vendor has
> > their own vendor-specific registers. Intel's are documented publicly on
> > the developer website.
> >
> > Jeff
> >
> >
> >
>
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