On Mon, May 23, 2022 at 09:18:31PM +0300, Dmitry Baryshkov wrote:
> Qualcomm version of DWC PCIe controller supports more than 32 MSI
> interrupts, but they are routed to separate interrupts in groups of 32
> vectors. To support such configuration, change the msi_irq field into an
> array. Let the DWC core handle all interrupts that were set in this
> array.
>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
> ---
> drivers/pci/controller/dwc/pci-dra7xx.c | 2 +-
> drivers/pci/controller/dwc/pci-exynos.c | 2 +-
> .../pci/controller/dwc/pcie-designware-host.c | 30 +++++++++++--------
> drivers/pci/controller/dwc/pcie-designware.h | 2 +-
> drivers/pci/controller/dwc/pcie-keembay.c | 2 +-
> drivers/pci/controller/dwc/pcie-spear13xx.c | 2 +-
> drivers/pci/controller/dwc/pcie-tegra194.c | 2 +-
> 7 files changed, 24 insertions(+), 18 deletions(-)
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index af91fe69f542..8dd913f69de7 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -257,8 +257,11 @@ int dw_pcie_allocate_domains(struct pcie_port *pp)
>
> static void dw_pcie_free_msi(struct pcie_port *pp)
> {
> - if (pp->msi_irq > 0)
> - irq_set_chained_handler_and_data(pp->msi_irq, NULL, NULL);
> + u32 ctrl;
> +
> + for (ctrl = 0; ctrl < MAX_MSI_CTRLS; ctrl++)
> + if (pp->msi_irq[ctrl] > 0)
> + irq_set_chained_handler_and_data(pp->msi_irq[ctrl], NULL, NULL);
I'd use brackets around multline statements for readability.
> irq_domain_remove(pp->msi_domain);
> irq_domain_remove(pp->irq_domain);
> @@ -383,10 +388,11 @@ int dw_pcie_host_init(struct pcie_port *pp)
> if (ret)
> return ret;
>
> - if (pp->msi_irq > 0)
> - irq_set_chained_handler_and_data(pp->msi_irq,
> - dw_chained_msi_isr,
> - pp);
> + for (ctrl = 0; ctrl < num_ctrls; ctrl++)
> + if (pp->msi_irq[ctrl] > 0)
> + irq_set_chained_handler_and_data(pp->msi_irq[ctrl],
> + dw_chained_msi_isr,
> + pp);
Same here (even if the old code didn't use it).
> ret = dma_set_mask(pci->dev, DMA_BIT_MASK(32));
> if (ret)
Looks good otherwise.
Reviewed-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Johan
