From d0fa06408ccf96b1d3d93d97fad6618e942efd38 Mon Sep 17 00:00:00 2001 From: Martin Jocic Date: Mon, 9 Sep 2024 13:35:12 +0200 Subject: [PATCH] can: kvaser_pciefd: Enable 64-bit DMA addressing Enabling 64-bit addressing for DMA buffers will prevent issues on some memory constrained platforms like e.g. Raspberry Pi 5, where the driver won't load because it cannot allocate enough continuous memory in the default 32-bit memory address range. Signed-off-by: Martin Jocic Link: https://patch.msgid.link/d7340f78e3db305bfeeb8229d2dd1c9077e10b92.1725875278.git.martin.jocic@kvaser.com Signed-off-by: Marc Kleine-Budde --- drivers/net/can/kvaser_pciefd.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c index 9ffc3ffb4e8f8..f86c9671a03a5 100644 --- a/drivers/net/can/kvaser_pciefd.c +++ b/drivers/net/can/kvaser_pciefd.c @@ -1104,6 +1104,9 @@ static int kvaser_pciefd_setup_dma(struct kvaser_pciefd *pcie) /* Disable the DMA */ iowrite32(0, KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_CTRL_REG); + + dma_set_mask_and_coherent(&pcie->pci->dev, DMA_BIT_MASK(64)); + for (i = 0; i < KVASER_PCIEFD_DMA_COUNT; i++) { pcie->dma_data[i] = dmam_alloc_coherent(&pcie->pci->dev, KVASER_PCIEFD_DMA_SIZE, -- 2.39.5