diff options
Diffstat (limited to 'arch/powerpc/platforms/powernv')
-rw-r--r-- | arch/powerpc/platforms/powernv/npu-dma.c | 64 |
1 files changed, 4 insertions, 60 deletions
diff --git a/arch/powerpc/platforms/powernv/npu-dma.c b/arch/powerpc/platforms/powernv/npu-dma.c index 6f60e0931922..75b935252981 100644 --- a/arch/powerpc/platforms/powernv/npu-dma.c +++ b/arch/powerpc/platforms/powernv/npu-dma.c @@ -102,63 +102,6 @@ struct pci_dev *pnv_pci_get_npu_dev(struct pci_dev *gpdev, int index) } EXPORT_SYMBOL(pnv_pci_get_npu_dev); -#define NPU_DMA_OP_UNSUPPORTED() \ - dev_err_once(dev, "%s operation unsupported for NVLink devices\n", \ - __func__) - -static void *dma_npu_alloc(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flag, - unsigned long attrs) -{ - NPU_DMA_OP_UNSUPPORTED(); - return NULL; -} - -static void dma_npu_free(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle, - unsigned long attrs) -{ - NPU_DMA_OP_UNSUPPORTED(); -} - -static dma_addr_t dma_npu_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction direction, - unsigned long attrs) -{ - NPU_DMA_OP_UNSUPPORTED(); - return 0; -} - -static int dma_npu_map_sg(struct device *dev, struct scatterlist *sglist, - int nelems, enum dma_data_direction direction, - unsigned long attrs) -{ - NPU_DMA_OP_UNSUPPORTED(); - return 0; -} - -static int dma_npu_dma_supported(struct device *dev, u64 mask) -{ - NPU_DMA_OP_UNSUPPORTED(); - return 0; -} - -static u64 dma_npu_get_required_mask(struct device *dev) -{ - NPU_DMA_OP_UNSUPPORTED(); - return 0; -} - -static const struct dma_map_ops dma_npu_ops = { - .map_page = dma_npu_map_page, - .map_sg = dma_npu_map_sg, - .alloc = dma_npu_alloc, - .free = dma_npu_free, - .dma_supported = dma_npu_dma_supported, - .get_required_mask = dma_npu_get_required_mask, -}; - /* * Returns the PE assoicated with the PCI device of the given * NPU. Returns the linked pci device if pci_dev != NULL. @@ -270,10 +213,11 @@ static void pnv_npu_dma_set_32(struct pnv_ioda_pe *npe) rc = pnv_npu_set_window(npe, 0, gpe->table_group.tables[0]); /* - * We don't initialise npu_pe->tce32_table as we always use - * dma_npu_ops which are nops. + * NVLink devices use the same TCE table configuration as + * their parent device so drivers shouldn't be doing DMA + * operations directly on these devices. */ - set_dma_ops(&npe->pdev->dev, &dma_npu_ops); + set_dma_ops(&npe->pdev->dev, NULL); } /* |