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| author |   Kishon Vijay Abraham I <kishon@ti.com> | 2017-08-18 20:27:53 +0530 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2017-08-18 10:41:20 -0500 |
| commit | 64c1a02aecd599bd2d920a01e103235e483fbc89 (patch) | |
| tree | 3e4dbb35d643a970e00018ba20f665aeb14f18d1 /drivers/pci/endpoint/pci-epc-core.c | |
| parent | Linux 4.13-rc3 (diff) | |
| download | linux-dev-64c1a02aecd599bd2d920a01e103235e483fbc89.tar.xz linux-dev-64c1a02aecd599bd2d920a01e103235e483fbc89.zip | |
PCI: endpoint: Use of_dma_configure() to set initial DMA mask
Use of_dma_configure() to set the initial DMA mask of EPF device. This
helps to get rid of "Coherent DMA mask 0x0 (pfn 0x0-0x1) covers a smaller
range of system memory than the DMA zone pfn" warning in certain platforms
like TI's K2G resulting in coherent DMA mask not being set.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/endpoint/pci-epc-core.c')
| -rw-r--r-- | drivers/pci/endpoint/pci-epc-core.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index caa7be10e473..42c2a1156325 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -21,6 +21,7 @@ #include <linux/dma-mapping.h> #include <linux/slab.h> #include <linux/module.h> +#include <linux/of_device.h> #include <linux/pci-epc.h> #include <linux/pci-epf.h> @@ -370,6 +371,7 @@ 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; @@ -381,8 +383,12 @@ int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf) return -EINVAL; epf->epc = epc; - dma_set_coherent_mask(&epf->dev, epc->dev.coherent_dma_mask); - epf->dev.dma_mask = epc->dev.dma_mask; + 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); @@ -500,6 +506,7 @@ __pci_epc_create(struct device *dev, const struct pci_epc_ops *ops, 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; ret = dev_set_name(&epc->dev, "%s", dev_name(dev)); |