diff options
| author | Cédric Le Goater <clg@kaod.org> | 2021-07-01 16:27:20 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-08-10 16:14:57 +0300 |
| commit | e81202007363bd694b711f307f02320b5f98edaa (patch) | |
| tree | 4e38d6c097d81bb809ba49562ae6fea2b9a3052d | |
| parent | 786e5b102a0007d81579822eac23cb5bfaa0b65f (diff) | |
| download | linux-e81202007363bd694b711f307f02320b5f98edaa.tar.xz | |
powerpc/pseries/pci: Introduce rtas_prepare_msi_irqs()
This splits the routine setting the MSIs in two parts: allocation of
MSIs for the PCI device at the FW level (RTAS) and the actual mapping
and activation of the IRQs.
rtas_prepare_msi_irqs() will serve as a handler for the PCI MSI domain.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210701132750.1475580-3-clg@kaod.org
| -rw-r--r-- | arch/powerpc/platforms/pseries/msi.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c index d2d090e04745..4bf14f27e1aa 100644 --- a/arch/powerpc/platforms/pseries/msi.c +++ b/arch/powerpc/platforms/pseries/msi.c @@ -373,12 +373,11 @@ static void rtas_hack_32bit_msi_gen2(struct pci_dev *pdev) pci_write_config_dword(pdev, pdev->msi_cap + PCI_MSI_ADDRESS_HI, 0); } -static int rtas_setup_msi_irqs(struct pci_dev *pdev, int nvec_in, int type) +static int rtas_prepare_msi_irqs(struct pci_dev *pdev, int nvec_in, int type, + msi_alloc_info_t *arg) { struct pci_dn *pdn; - int hwirq, virq, i, quota, rc; - struct msi_desc *entry; - struct msi_msg msg; + int quota, rc; int nvec = nvec_in; int use_32bit_msi_hack = 0; @@ -456,6 +455,22 @@ again: return rc; } + return 0; +} + +static int rtas_setup_msi_irqs(struct pci_dev *pdev, int nvec_in, int type) +{ + struct pci_dn *pdn; + int hwirq, virq, i; + int rc; + struct msi_desc *entry; + struct msi_msg msg; + + rc = rtas_prepare_msi_irqs(pdev, nvec_in, type, NULL); + if (rc) + return rc; + + pdn = pci_get_pdn(pdev); i = 0; for_each_pci_msi_entry(entry, pdev) { hwirq = rtas_query_irq_number(pdn, i++); |