| Message ID | 20210916234100.122368-14-logang@deltatee.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Userspace P2PDMA with O_DIRECT NVMe devices | expand |
On Thu, Sep 16, 2021 at 05:40:53PM -0600, Logan Gunthorpe wrote: > This interface is superseded by support in dma_map_sg() which now supports > heterogeneous scatterlists. There are no longer any users, so remove it. > > Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Ditto. > --- > drivers/pci/p2pdma.c | 65 -------------------------------------- > include/linux/pci-p2pdma.h | 27 ---------------- > 2 files changed, 92 deletions(-) > > diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c > index 58c34f1f1473..4478633346bd 100644 > --- a/drivers/pci/p2pdma.c > +++ b/drivers/pci/p2pdma.c > @@ -878,71 +878,6 @@ enum pci_p2pdma_map_type pci_p2pdma_map_type(struct dev_pagemap *pgmap, > return type; > } > > -static int __pci_p2pdma_map_sg(struct pci_p2pdma_pagemap *p2p_pgmap, > - struct device *dev, struct scatterlist *sg, int nents) > -{ > - struct scatterlist *s; > - int i; > - > - for_each_sg(sg, s, nents, i) { > - s->dma_address = sg_phys(s) - p2p_pgmap->bus_offset; > - sg_dma_len(s) = s->length; > - } > - > - return nents; > -} > - > -/** > - * pci_p2pdma_map_sg_attrs - map a PCI peer-to-peer scatterlist for DMA > - * @dev: device doing the DMA request > - * @sg: scatter list to map > - * @nents: elements in the scatterlist > - * @dir: DMA direction > - * @attrs: DMA attributes passed to dma_map_sg() (if called) > - * > - * Scatterlists mapped with this function should be unmapped using > - * pci_p2pdma_unmap_sg_attrs(). > - * > - * Returns the number of SG entries mapped or 0 on error. > - */ > -int pci_p2pdma_map_sg_attrs(struct device *dev, struct scatterlist *sg, > - int nents, enum dma_data_direction dir, unsigned long attrs) > -{ > - struct pci_p2pdma_pagemap *p2p_pgmap = > - to_p2p_pgmap(sg_page(sg)->pgmap); > - > - switch (pci_p2pdma_map_type(sg_page(sg)->pgmap, dev)) { > - case PCI_P2PDMA_MAP_THRU_HOST_BRIDGE: > - return dma_map_sg_attrs(dev, sg, nents, dir, attrs); > - case PCI_P2PDMA_MAP_BUS_ADDR: > - return __pci_p2pdma_map_sg(p2p_pgmap, dev, sg, nents); > - default: > - return 0; > - } > -} > -EXPORT_SYMBOL_GPL(pci_p2pdma_map_sg_attrs); > - > -/** > - * pci_p2pdma_unmap_sg_attrs - unmap a PCI peer-to-peer scatterlist that was > - * mapped with pci_p2pdma_map_sg() > - * @dev: device doing the DMA request > - * @sg: scatter list to map > - * @nents: number of elements returned by pci_p2pdma_map_sg() > - * @dir: DMA direction > - * @attrs: DMA attributes passed to dma_unmap_sg() (if called) > - */ > -void pci_p2pdma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, > - int nents, enum dma_data_direction dir, unsigned long attrs) > -{ > - enum pci_p2pdma_map_type map_type; > - > - map_type = pci_p2pdma_map_type(sg_page(sg)->pgmap, dev); > - > - if (map_type == PCI_P2PDMA_MAP_THRU_HOST_BRIDGE) > - dma_unmap_sg_attrs(dev, sg, nents, dir, attrs); > -} > -EXPORT_SYMBOL_GPL(pci_p2pdma_unmap_sg_attrs); > - > /** > * pci_p2pdma_map_segment - map an sg segment determining the mapping type > * @state: State structure that should be declared outside of the for_each_sg() > diff --git a/include/linux/pci-p2pdma.h b/include/linux/pci-p2pdma.h > index e5a8d5bc0f51..0c33a40a86e7 100644 > --- a/include/linux/pci-p2pdma.h > +++ b/include/linux/pci-p2pdma.h > @@ -72,10 +72,6 @@ void pci_p2pmem_free_sgl(struct pci_dev *pdev, struct scatterlist *sgl); > void pci_p2pmem_publish(struct pci_dev *pdev, bool publish); > enum pci_p2pdma_map_type pci_p2pdma_map_type(struct dev_pagemap *pgmap, > struct device *dev); > -int pci_p2pdma_map_sg_attrs(struct device *dev, struct scatterlist *sg, > - int nents, enum dma_data_direction dir, unsigned long attrs); > -void pci_p2pdma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, > - int nents, enum dma_data_direction dir, unsigned long attrs); > enum pci_p2pdma_map_type > pci_p2pdma_map_segment(struct pci_p2pdma_map_state *state, struct device *dev, > struct scatterlist *sg); > @@ -135,17 +131,6 @@ pci_p2pdma_map_type(struct dev_pagemap *pgmap, struct device *dev) > { > return PCI_P2PDMA_MAP_NOT_SUPPORTED; > } > -static inline int pci_p2pdma_map_sg_attrs(struct device *dev, > - struct scatterlist *sg, int nents, enum dma_data_direction dir, > - unsigned long attrs) > -{ > - return 0; > -} > -static inline void pci_p2pdma_unmap_sg_attrs(struct device *dev, > - struct scatterlist *sg, int nents, enum dma_data_direction dir, > - unsigned long attrs) > -{ > -} > static inline enum pci_p2pdma_map_type > pci_p2pdma_map_segment(struct pci_p2pdma_map_state *state, struct device *dev, > struct scatterlist *sg) > @@ -181,16 +166,4 @@ static inline struct pci_dev *pci_p2pmem_find(struct device *client) > return pci_p2pmem_find_many(&client, 1); > } > > -static inline int pci_p2pdma_map_sg(struct device *dev, struct scatterlist *sg, > - int nents, enum dma_data_direction dir) > -{ > - return pci_p2pdma_map_sg_attrs(dev, sg, nents, dir, 0); > -} > - > -static inline void pci_p2pdma_unmap_sg(struct device *dev, > - struct scatterlist *sg, int nents, enum dma_data_direction dir) > -{ > - pci_p2pdma_unmap_sg_attrs(dev, sg, nents, dir, 0); > -} > - > #endif /* _LINUX_PCI_P2P_H */ > -- > 2.30.2 >
On Thu, Sep 16, 2021 at 05:40:53PM -0600, Logan Gunthorpe wrote: > This interface is superseded by support in dma_map_sg() which now supports > heterogeneous scatterlists. There are no longer any users, so remove it. > > Signed-off-by: Logan Gunthorpe <logang@deltatee.com> > --- > drivers/pci/p2pdma.c | 65 -------------------------------------- > include/linux/pci-p2pdma.h | 27 ---------------- > 2 files changed, 92 deletions(-) Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Good riddance :) Jason
On 9/17/2021 2:40 AM, Logan Gunthorpe wrote: > This interface is superseded by support in dma_map_sg() which now supports > heterogeneous scatterlists. There are no longer any users, so remove it. > > Signed-off-by: Logan Gunthorpe <logang@deltatee.com> > --- > drivers/pci/p2pdma.c | 65 -------------------------------------- > include/linux/pci-p2pdma.h | 27 ---------------- > 2 files changed, 92 deletions(-) Looks good, Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c index 58c34f1f1473..4478633346bd 100644 --- a/drivers/pci/p2pdma.c +++ b/drivers/pci/p2pdma.c @@ -878,71 +878,6 @@ enum pci_p2pdma_map_type pci_p2pdma_map_type(struct dev_pagemap *pgmap, return type; } -static int __pci_p2pdma_map_sg(struct pci_p2pdma_pagemap *p2p_pgmap, - struct device *dev, struct scatterlist *sg, int nents) -{ - struct scatterlist *s; - int i; - - for_each_sg(sg, s, nents, i) { - s->dma_address = sg_phys(s) - p2p_pgmap->bus_offset; - sg_dma_len(s) = s->length; - } - - return nents; -} - -/** - * pci_p2pdma_map_sg_attrs - map a PCI peer-to-peer scatterlist for DMA - * @dev: device doing the DMA request - * @sg: scatter list to map - * @nents: elements in the scatterlist - * @dir: DMA direction - * @attrs: DMA attributes passed to dma_map_sg() (if called) - * - * Scatterlists mapped with this function should be unmapped using - * pci_p2pdma_unmap_sg_attrs(). - * - * Returns the number of SG entries mapped or 0 on error. - */ -int pci_p2pdma_map_sg_attrs(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, unsigned long attrs) -{ - struct pci_p2pdma_pagemap *p2p_pgmap = - to_p2p_pgmap(sg_page(sg)->pgmap); - - switch (pci_p2pdma_map_type(sg_page(sg)->pgmap, dev)) { - case PCI_P2PDMA_MAP_THRU_HOST_BRIDGE: - return dma_map_sg_attrs(dev, sg, nents, dir, attrs); - case PCI_P2PDMA_MAP_BUS_ADDR: - return __pci_p2pdma_map_sg(p2p_pgmap, dev, sg, nents); - default: - return 0; - } -} -EXPORT_SYMBOL_GPL(pci_p2pdma_map_sg_attrs); - -/** - * pci_p2pdma_unmap_sg_attrs - unmap a PCI peer-to-peer scatterlist that was - * mapped with pci_p2pdma_map_sg() - * @dev: device doing the DMA request - * @sg: scatter list to map - * @nents: number of elements returned by pci_p2pdma_map_sg() - * @dir: DMA direction - * @attrs: DMA attributes passed to dma_unmap_sg() (if called) - */ -void pci_p2pdma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, unsigned long attrs) -{ - enum pci_p2pdma_map_type map_type; - - map_type = pci_p2pdma_map_type(sg_page(sg)->pgmap, dev); - - if (map_type == PCI_P2PDMA_MAP_THRU_HOST_BRIDGE) - dma_unmap_sg_attrs(dev, sg, nents, dir, attrs); -} -EXPORT_SYMBOL_GPL(pci_p2pdma_unmap_sg_attrs); - /** * pci_p2pdma_map_segment - map an sg segment determining the mapping type * @state: State structure that should be declared outside of the for_each_sg() diff --git a/include/linux/pci-p2pdma.h b/include/linux/pci-p2pdma.h index e5a8d5bc0f51..0c33a40a86e7 100644 --- a/include/linux/pci-p2pdma.h +++ b/include/linux/pci-p2pdma.h @@ -72,10 +72,6 @@ void pci_p2pmem_free_sgl(struct pci_dev *pdev, struct scatterlist *sgl); void pci_p2pmem_publish(struct pci_dev *pdev, bool publish); enum pci_p2pdma_map_type pci_p2pdma_map_type(struct dev_pagemap *pgmap, struct device *dev); -int pci_p2pdma_map_sg_attrs(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, unsigned long attrs); -void pci_p2pdma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, unsigned long attrs); enum pci_p2pdma_map_type pci_p2pdma_map_segment(struct pci_p2pdma_map_state *state, struct device *dev, struct scatterlist *sg); @@ -135,17 +131,6 @@ pci_p2pdma_map_type(struct dev_pagemap *pgmap, struct device *dev) { return PCI_P2PDMA_MAP_NOT_SUPPORTED; } -static inline int pci_p2pdma_map_sg_attrs(struct device *dev, - struct scatterlist *sg, int nents, enum dma_data_direction dir, - unsigned long attrs) -{ - return 0; -} -static inline void pci_p2pdma_unmap_sg_attrs(struct device *dev, - struct scatterlist *sg, int nents, enum dma_data_direction dir, - unsigned long attrs) -{ -} static inline enum pci_p2pdma_map_type pci_p2pdma_map_segment(struct pci_p2pdma_map_state *state, struct device *dev, struct scatterlist *sg) @@ -181,16 +166,4 @@ static inline struct pci_dev *pci_p2pmem_find(struct device *client) return pci_p2pmem_find_many(&client, 1); } -static inline int pci_p2pdma_map_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir) -{ - return pci_p2pdma_map_sg_attrs(dev, sg, nents, dir, 0); -} - -static inline void pci_p2pdma_unmap_sg(struct device *dev, - struct scatterlist *sg, int nents, enum dma_data_direction dir) -{ - pci_p2pdma_unmap_sg_attrs(dev, sg, nents, dir, 0); -} - #endif /* _LINUX_PCI_P2P_H */
This interface is superseded by support in dma_map_sg() which now supports heterogeneous scatterlists. There are no longer any users, so remove it. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> --- drivers/pci/p2pdma.c | 65 -------------------------------------- include/linux/pci-p2pdma.h | 27 ---------------- 2 files changed, 92 deletions(-)