| Message ID | 20201104095052.1222754-4-hch@lst.de (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | [1/5] RDMA/core: remove ib_dma_{alloc,free}_coherent | expand |
s|PCI/p2p: remove|PCI/P2PDMA: Remove/ to match history. On Wed, Nov 04, 2020 at 10:50:50AM +0100, Christoph Hellwig wrote: > Now that all users of dma_virt_ops are gone we can remove the workaround > for it in the PCIe peer to peer code. s/PCIe/PCI/ We went to some trouble to make P2PDMA work on conventional PCI as well as PCIe. > Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Bjorn Helgaas <bhelgaas@google.com> > --- > drivers/pci/p2pdma.c | 20 -------------------- > 1 file changed, 20 deletions(-) > > diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c > index de1c331dbed43f..b07018af53876c 100644 > --- a/drivers/pci/p2pdma.c > +++ b/drivers/pci/p2pdma.c > @@ -556,15 +556,6 @@ int pci_p2pdma_distance_many(struct pci_dev *provider, struct device **clients, > return -1; > > for (i = 0; i < num_clients; i++) { > -#ifdef CONFIG_DMA_VIRT_OPS > - if (clients[i]->dma_ops == &dma_virt_ops) { > - if (verbose) > - dev_warn(clients[i], > - "cannot be used for peer-to-peer DMA because the driver makes use of dma_virt_ops\n"); > - return -1; > - } > -#endif > - > pci_client = find_parent_pci_dev(clients[i]); > if (!pci_client) { > if (verbose) > @@ -837,17 +828,6 @@ static int __pci_p2pdma_map_sg(struct pci_p2pdma_pagemap *p2p_pgmap, > phys_addr_t paddr; > int i; > > - /* > - * p2pdma mappings are not compatible with devices that use > - * dma_virt_ops. If the upper layers do the right thing > - * this should never happen because it will be prevented > - * by the check in pci_p2pdma_distance_many() > - */ > -#ifdef CONFIG_DMA_VIRT_OPS > - if (WARN_ON_ONCE(dev->dma_ops == &dma_virt_ops)) > - return 0; > -#endif > - > for_each_sg(sg, s, nents, i) { > paddr = sg_phys(s); > > -- > 2.28.0 >
On 2020-11-04 2:50 a.m., Christoph Hellwig wrote: > Now that all users of dma_virt_ops are gone we can remove the workaround > for it in the PCIe peer to peer code. > > Signed-off-by: Christoph Hellwig <hch@lst.de> The two P2PDMA patches look fine to me. Nice to get rid of that hack. Reviewed-by: Logan Gunthorpe <logang@deltatee.com> Thanks, Logan
diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c index de1c331dbed43f..b07018af53876c 100644 --- a/drivers/pci/p2pdma.c +++ b/drivers/pci/p2pdma.c @@ -556,15 +556,6 @@ int pci_p2pdma_distance_many(struct pci_dev *provider, struct device **clients, return -1; for (i = 0; i < num_clients; i++) { -#ifdef CONFIG_DMA_VIRT_OPS - if (clients[i]->dma_ops == &dma_virt_ops) { - if (verbose) - dev_warn(clients[i], - "cannot be used for peer-to-peer DMA because the driver makes use of dma_virt_ops\n"); - return -1; - } -#endif - pci_client = find_parent_pci_dev(clients[i]); if (!pci_client) { if (verbose) @@ -837,17 +828,6 @@ static int __pci_p2pdma_map_sg(struct pci_p2pdma_pagemap *p2p_pgmap, phys_addr_t paddr; int i; - /* - * p2pdma mappings are not compatible with devices that use - * dma_virt_ops. If the upper layers do the right thing - * this should never happen because it will be prevented - * by the check in pci_p2pdma_distance_many() - */ -#ifdef CONFIG_DMA_VIRT_OPS - if (WARN_ON_ONCE(dev->dma_ops == &dma_virt_ops)) - return 0; -#endif - for_each_sg(sg, s, nents, i) { paddr = sg_phys(s);
Now that all users of dma_virt_ops are gone we can remove the workaround for it in the PCIe peer to peer code. Signed-off-by: Christoph Hellwig <hch@lst.de> --- drivers/pci/p2pdma.c | 20 -------------------- 1 file changed, 20 deletions(-)