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git://projects.qi-hardware.com/openwrt-xburst.git
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df14a3269c
- refresh and reorder patches - introduce a unified BCMA/SSB glue driver to accomodate for both bus types on brcm47xx - extend wlunbind init script to detach device from bcma-pci-bridge as well git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27751 3c298f89-4303-0410-b956-a3cf2f4a3e73
89 lines
2.7 KiB
Diff
89 lines
2.7 KiB
Diff
From: George Kashperko <george@znau.edu.ua>
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broadcom-wl driver bound to ssb device with ssb driver probe
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have osh handle struct pdev pointer value initialized with
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ssb_device pointer. Later on pdev is used with legacy pci
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dma api as pci_dev thus causing oops sometimes.
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The patch replaces legacy pci dma api and pass relevant
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device struct pointer to avoid crashes.
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Signed-off-by: George Kashperko <george@znau.edu.ua>
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---
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driver/linux_osl.c | 28 +++++++++++++++++++++++-----
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1 file changed, 23 insertions(+), 5 deletions(-)
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--- a/driver/linux_osl.c
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+++ b/driver/linux_osl.c
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@@ -25,6 +25,9 @@
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#include <asm/paccess.h>
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#endif /* mips */
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#include <pcicfg.h>
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+#ifdef CONFIG_SSB
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+#include <linux/ssb/ssb.h>
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+#endif
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#define PCI_CFG_RETRY 10
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@@ -364,12 +367,27 @@ osl_dma_consistent_align(void)
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return (PAGE_SIZE);
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}
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+static struct device *
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+osl_get_dmadev(osl_t *osh)
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+{
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+#ifdef CONFIG_SSB
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+ if (osh->bustype == SI_BUS) {
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+ /* This can be SiliconBackplane emulated as pci with Broadcom or
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+ * ssb device. Less harmful is to check for pci_bus_type and if
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+ * no match then assume we got ssb */
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+ if (((struct pci_dev *)osh->pdev)->dev.bus != &pci_bus_type)
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+ return ((struct ssb_device *)osh->pdev)->dma_dev;
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+ }
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+#endif
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+ return &((struct pci_dev *)osh->pdev)->dev;
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+}
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+
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void*
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osl_dma_alloc_consistent(osl_t *osh, uint size, ulong *pap)
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{
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ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
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- return (pci_alloc_consistent(osh->pdev, size, (dma_addr_t*)pap));
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+ return (dma_alloc_coherent(osl_get_dmadev(osh), size, (dma_addr_t*)pap, GFP_ATOMIC));
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}
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void
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@@ -377,7 +395,7 @@ osl_dma_free_consistent(osl_t *osh, void
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{
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ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
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- pci_free_consistent(osh->pdev, size, va, (dma_addr_t)pa);
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+ dma_free_coherent(osl_get_dmadev(osh), size, va, (dma_addr_t)pa);
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}
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uint BCMFASTPATH
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@@ -386,13 +404,13 @@ osl_dma_map(osl_t *osh, void *va, uint s
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ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
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if (direction == DMA_TX)
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- return (pci_map_single(osh->pdev, va, size, PCI_DMA_TODEVICE));
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+ return (dma_map_single(osl_get_dmadev(osh), va, size, PCI_DMA_TODEVICE));
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else {
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#ifdef mips
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dma_cache_inv((uint)va, size);
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return (virt_to_phys(va));
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#else /* mips */
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- return (pci_map_single(osh->pdev, va, size, PCI_DMA_FROMDEVICE));
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+ return (dma_map_single(osl_get_dmadev(osh), va, size, PCI_DMA_FROMDEVICE));
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#endif /* mips */
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}
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}
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@@ -404,7 +422,7 @@ osl_dma_unmap(osl_t *osh, uint pa, uint
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ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
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dir = (direction == DMA_TX)? PCI_DMA_TODEVICE: PCI_DMA_FROMDEVICE;
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- pci_unmap_single(osh->pdev, (uint32)pa, size, dir);
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+ dma_unmap_single(osl_get_dmadev(osh), (uint32)pa, size, dir);
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}
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