| Message ID | 20180111083057.1134-1-kishon@ti.com |
|---|---|
| State | Accepted |
| Headers | show |
| Series | [v3] PCI: endpoint: Use EPC's device in dma_alloc_coherent/dma_free_coherent | expand |
On Thu, Jan 11, 2018 at 02:00:57PM +0530, Kishon Vijay Abraham I wrote: > After commit 723288836628bc1c08 ("of: restrict DMA configuration"), > of_dma_configure doesn't configure the coherent_dma_mask/dma_mask > of endpoint function device (since it doesn't have a dt node associated > with and hence no dma-ranges property), resulting in dma_alloc_coherent > (used in pci_epf_alloc_space) to fail. > > Fix it by making dma_alloc_coherent use EPC's device for allocating > memory address. > > Link: http://lkml.kernel.org/r/64d63468-d28f-8fcd-a6f3-cf2a6401c8cb@ti.com > Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> > Cc: Robin Murphy <robin.murphy@arm.com> > Cc: Rob Herring <robh@kernel.org> > Cc: Christoph Hellwig <hch@lst.de> > Tested-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> > Tested-by: Niklas Cassel <niklas.cassel@axis.com> > Reviewed-by: Robin Murphy <robin.murphy@arm.com> > --- > Changes from v2: > No change in patch. Added "Link", "Reviewed-by" and "Tested-by" tags > > Changes from v1: > No change in patch. Only added "Tested-by" of Cyrille Pitchen. > > drivers/pci/endpoint/pci-epc-core.c | 10 ---------- > drivers/pci/endpoint/pci-epf-core.c | 4 ++-- > 2 files changed, 2 insertions(+), 12 deletions(-) Applied to pci/endpoint for v4.16, thanks. Lorenzo > diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c > index 42c2a1156325..cd7d4788b94d 100644 > --- a/drivers/pci/endpoint/pci-epc-core.c > +++ b/drivers/pci/endpoint/pci-epc-core.c > @@ -18,7 +18,6 @@ > */ > > #include <linux/device.h> > -#include <linux/dma-mapping.h> > #include <linux/slab.h> > #include <linux/module.h> > #include <linux/of_device.h> > @@ -371,7 +370,6 @@ EXPORT_SYMBOL_GPL(pci_epc_write_header); > int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf) > { > unsigned long flags; > - struct device *dev = epc->dev.parent; > > if (epf->epc) > return -EBUSY; > @@ -383,12 +381,6 @@ int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf) > return -EINVAL; > > epf->epc = epc; > - if (dev->of_node) { > - of_dma_configure(&epf->dev, dev->of_node); > - } else { > - dma_set_coherent_mask(&epf->dev, epc->dev.coherent_dma_mask); > - epf->dev.dma_mask = epc->dev.dma_mask; > - } > > spin_lock_irqsave(&epc->lock, flags); > list_add_tail(&epf->list, &epc->pci_epf); > @@ -503,9 +495,7 @@ __pci_epc_create(struct device *dev, const struct pci_epc_ops *ops, > INIT_LIST_HEAD(&epc->pci_epf); > > device_initialize(&epc->dev); > - dma_set_coherent_mask(&epc->dev, dev->coherent_dma_mask); > epc->dev.class = pci_epc_class; > - epc->dev.dma_mask = dev->dma_mask; > epc->dev.parent = dev; > epc->ops = ops; > > diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c > index ae1611a62808..95ccc4b8a0a2 100644 > --- a/drivers/pci/endpoint/pci-epf-core.c > +++ b/drivers/pci/endpoint/pci-epf-core.c > @@ -99,7 +99,7 @@ EXPORT_SYMBOL_GPL(pci_epf_bind); > */ > void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar) > { > - struct device *dev = &epf->dev; > + struct device *dev = epf->epc->dev.parent; > > if (!addr) > return; > @@ -122,7 +122,7 @@ EXPORT_SYMBOL_GPL(pci_epf_free_space); > void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar) > { > void *space; > - struct device *dev = &epf->dev; > + struct device *dev = epf->epc->dev.parent; > dma_addr_t phys_addr; > > if (size < 128) > -- > 2.11.0 >
diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index 42c2a1156325..cd7d4788b94d 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -18,7 +18,6 @@ */ #include <linux/device.h> -#include <linux/dma-mapping.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/of_device.h> @@ -371,7 +370,6 @@ EXPORT_SYMBOL_GPL(pci_epc_write_header); int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf) { unsigned long flags; - struct device *dev = epc->dev.parent; if (epf->epc) return -EBUSY; @@ -383,12 +381,6 @@ int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf) return -EINVAL; epf->epc = epc; - if (dev->of_node) { - of_dma_configure(&epf->dev, dev->of_node); - } else { - dma_set_coherent_mask(&epf->dev, epc->dev.coherent_dma_mask); - epf->dev.dma_mask = epc->dev.dma_mask; - } spin_lock_irqsave(&epc->lock, flags); list_add_tail(&epf->list, &epc->pci_epf); @@ -503,9 +495,7 @@ __pci_epc_create(struct device *dev, const struct pci_epc_ops *ops, INIT_LIST_HEAD(&epc->pci_epf); device_initialize(&epc->dev); - dma_set_coherent_mask(&epc->dev, dev->coherent_dma_mask); epc->dev.class = pci_epc_class; - epc->dev.dma_mask = dev->dma_mask; epc->dev.parent = dev; epc->ops = ops; diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c index ae1611a62808..95ccc4b8a0a2 100644 --- a/drivers/pci/endpoint/pci-epf-core.c +++ b/drivers/pci/endpoint/pci-epf-core.c @@ -99,7 +99,7 @@ EXPORT_SYMBOL_GPL(pci_epf_bind); */ void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar) { - struct device *dev = &epf->dev; + struct device *dev = epf->epc->dev.parent; if (!addr) return; @@ -122,7 +122,7 @@ EXPORT_SYMBOL_GPL(pci_epf_free_space); void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar) { void *space; - struct device *dev = &epf->dev; + struct device *dev = epf->epc->dev.parent; dma_addr_t phys_addr; if (size < 128)
After commit 723288836628bc1c08 ("of: restrict DMA configuration"), of_dma_configure doesn't configure the coherent_dma_mask/dma_mask of endpoint function device (since it doesn't have a dt node associated with and hence no dma-ranges property), resulting in dma_alloc_coherent (used in pci_epf_alloc_space) to fail. Fix it by making dma_alloc_coherent use EPC's device for allocating memory address. Link: http://lkml.kernel.org/r/64d63468-d28f-8fcd-a6f3-cf2a6401c8cb@ti.com Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Rob Herring <robh@kernel.org> Cc: Christoph Hellwig <hch@lst.de> Tested-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> Tested-by: Niklas Cassel <niklas.cassel@axis.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com> --- Changes from v2: No change in patch. Added "Link", "Reviewed-by" and "Tested-by" tags Changes from v1: No change in patch. Only added "Tested-by" of Cyrille Pitchen. drivers/pci/endpoint/pci-epc-core.c | 10 ---------- drivers/pci/endpoint/pci-epf-core.c | 4 ++-- 2 files changed, 2 insertions(+), 12 deletions(-)