diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.10/0197-xhci-fix-dma-mask-setup-in-xhci.c.patch')
| -rw-r--r-- | target/linux/mvebu/patches-3.10/0197-xhci-fix-dma-mask-setup-in-xhci.c.patch | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/target/linux/mvebu/patches-3.10/0197-xhci-fix-dma-mask-setup-in-xhci.c.patch b/target/linux/mvebu/patches-3.10/0197-xhci-fix-dma-mask-setup-in-xhci.c.patch deleted file mode 100644 index 1d2e18b..0000000 --- a/target/linux/mvebu/patches-3.10/0197-xhci-fix-dma-mask-setup-in-xhci.c.patch +++ /dev/null @@ -1,124 +0,0 @@ -From 5cb802766e9cdc9a56e8ce8e4686692ebbcfb5cc Mon Sep 17 00:00:00 2001 -From: Xenia Ragiadakou <burzalodowa@gmail.com> -Date: Mon, 23 Dec 2013 16:59:02 +0100 -Subject: [PATCH 197/203] xhci: fix dma mask setup in xhci.c - -The function dma_set_mask() tests internally whether the dma_mask pointer -for the device is initialized and fails if the dma_mask pointer is NULL. -On pci platforms, the device dma_mask pointer is initialized, when pci -devices are enumerated, to point to the pci_dev->dma_mask which is 0xffffffff. -However, for non-pci platforms, the dma_mask pointer may not be initialized -and in that case dma_set_mask() will fail. - -This patch initializes the dma_mask and the coherent_dma_mask to 32bits -in xhci_plat_probe(), before the call to usb_create_hcd() that sets the -"uses_dma" flag for the usb bus and the call to usb_add_hcd() that creates -coherent dma pools for the usb hcd. - -Moreover, a call to dma_set_mask() does not set the device coherent_dma_mask. -Since the xhci-hcd driver calls dma_alloc_coherent() and dma_pool_alloc() -to allocate consistent DMA memory blocks, the coherent DMA address mask -has to be set explicitly. - -This patch sets the coherent_dma_mask to 64bits in xhci_gen_setup() when -the xHC is capable for 64-bit DMA addressing. - -If dma_set_mask() succeeds, for a given bitmask, it is guaranteed that -the given bitmask is also supported for consistent DMA mappings. - -Other changes introduced in this patch are: - -- The return value of dma_set_mask() is checked to ensure that the required - dma bitmask conforms with the host system's addressing capabilities. - -- The dma_mask setup code for the non-primary hcd was removed since both - primary and non-primary hcd refer to the same generic device whose - dma_mask and coherent_dma_mask are already set during the setup of - the primary hcd. - -- The code for reading the HCCPARAMS register to find out the addressing - capabilities of xHC was removed since its value is already cached in - xhci->hccparams. - -- hcd->self.controller was replaced with the dev variable since it is - already available. - -Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com> -Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> - -Conflicts: - drivers/usb/host/xhci-plat.c ---- - drivers/usb/host/xhci-plat.c | 10 ++++++++++ - drivers/usb/host/xhci.c | 19 +++++-------------- - 2 files changed, 15 insertions(+), 14 deletions(-) - ---- a/drivers/usb/host/xhci-plat.c -+++ b/drivers/usb/host/xhci-plat.c -@@ -15,6 +15,7 @@ - #include <linux/module.h> - #include <linux/slab.h> - #include <linux/of.h> -+#include <linux/dma-mapping.h> - - #include "xhci.h" - -@@ -105,6 +106,15 @@ static int xhci_plat_probe(struct platfo - if (!res) - return -ENODEV; - -+ /* Initialize dma_mask and coherent_dma_mask to 32-bits */ -+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); -+ if (ret) -+ return ret; -+ if (!pdev->dev.dma_mask) -+ pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; -+ else -+ dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); -+ - hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); - if (!hcd) - return -ENOMEM; ---- a/drivers/usb/host/xhci.c -+++ b/drivers/usb/host/xhci.c -@@ -4657,7 +4657,6 @@ int xhci_gen_setup(struct usb_hcd *hcd, - struct xhci_hcd *xhci; - struct device *dev = hcd->self.controller; - int retval; -- u32 temp; - - /* Accept arbitrarily long scatter-gather lists */ - hcd->self.sg_tablesize = ~0; -@@ -4685,14 +4684,6 @@ int xhci_gen_setup(struct usb_hcd *hcd, - /* xHCI private pointer was set in xhci_pci_probe for the second - * registered roothub. - */ -- xhci = hcd_to_xhci(hcd); -- temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params); -- if (HCC_64BIT_ADDR(temp)) { -- xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n"); -- dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)); -- } else { -- dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32)); -- } - return 0; - } - -@@ -4731,12 +4722,12 @@ int xhci_gen_setup(struct usb_hcd *hcd, - goto error; - xhci_dbg(xhci, "Reset complete\n"); - -- temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params); -- if (HCC_64BIT_ADDR(temp)) { -+ /* Set dma_mask and coherent_dma_mask to 64-bits, -+ * if xHC supports 64-bit addressing */ -+ if (HCC_64BIT_ADDR(xhci->hcc_params) && -+ !dma_set_mask(dev, DMA_BIT_MASK(64))) { - xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n"); -- dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)); -- } else { -- dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32)); -+ dma_set_coherent_mask(dev, DMA_BIT_MASK(64)); - } - - xhci_dbg(xhci, "Calling HCD init\n"); |