From: Allen Hubbe Date: Fri, 22 Jul 2016 13:38:22 +0000 (-0400) Subject: NTB: ntb_hw_intel: show BAR size in debugfs info X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4089527388808ca380af908fdbdd3d723cc9e751;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git NTB: ntb_hw_intel: show BAR size in debugfs info It will be useful to know the hardware configured BAR size to diagnose issues with NTB memory windows. Signed-off-by: Allen Hubbe Acked-by: Dave Jiang Signed-off-by: Jon Mason --- diff --git a/drivers/ntb/hw/intel/ntb_hw_intel.c b/drivers/ntb/hw/intel/ntb_hw_intel.c index 40d04ef5da9e..5efd03705e5c 100644 --- a/drivers/ntb/hw/intel/ntb_hw_intel.c +++ b/drivers/ntb/hw/intel/ntb_hw_intel.c @@ -551,13 +551,15 @@ static ssize_t ndev_debugfs_read(struct file *filp, char __user *ubuf, size_t count, loff_t *offp) { struct intel_ntb_dev *ndev; + struct pci_dev *pdev; void __iomem *mmio; char *buf; size_t buf_size; ssize_t ret, off; - union { u64 v64; u32 v32; u16 v16; } u; + union { u64 v64; u32 v32; u16 v16; u8 v8; } u; ndev = filp->private_data; + pdev = ndev_pdev(ndev); mmio = ndev->self_mmio; buf_size = min(count, 0x800ul); @@ -631,6 +633,41 @@ static ssize_t ndev_debugfs_read(struct file *filp, char __user *ubuf, off += scnprintf(buf + off, buf_size - off, "Doorbell Bell -\t\t%#llx\n", u.v64); + off += scnprintf(buf + off, buf_size - off, + "\nNTB Window Size:\n"); + + pci_read_config_byte(pdev, XEON_PBAR23SZ_OFFSET, &u.v8); + off += scnprintf(buf + off, buf_size - off, + "PBAR23SZ %hhu\n", u.v8); + if (!ndev->bar4_split) { + pci_read_config_byte(pdev, XEON_PBAR45SZ_OFFSET, &u.v8); + off += scnprintf(buf + off, buf_size - off, + "PBAR45SZ %hhu\n", u.v8); + } else { + pci_read_config_byte(pdev, XEON_PBAR4SZ_OFFSET, &u.v8); + off += scnprintf(buf + off, buf_size - off, + "PBAR4SZ %hhu\n", u.v8); + pci_read_config_byte(pdev, XEON_PBAR5SZ_OFFSET, &u.v8); + off += scnprintf(buf + off, buf_size - off, + "PBAR5SZ %hhu\n", u.v8); + } + + pci_read_config_byte(pdev, XEON_SBAR23SZ_OFFSET, &u.v8); + off += scnprintf(buf + off, buf_size - off, + "SBAR23SZ %hhu\n", u.v8); + if (!ndev->bar4_split) { + pci_read_config_byte(pdev, XEON_SBAR45SZ_OFFSET, &u.v8); + off += scnprintf(buf + off, buf_size - off, + "SBAR45SZ %hhu\n", u.v8); + } else { + pci_read_config_byte(pdev, XEON_SBAR4SZ_OFFSET, &u.v8); + off += scnprintf(buf + off, buf_size - off, + "SBAR4SZ %hhu\n", u.v8); + pci_read_config_byte(pdev, XEON_SBAR5SZ_OFFSET, &u.v8); + off += scnprintf(buf + off, buf_size - off, + "SBAR5SZ %hhu\n", u.v8); + } + off += scnprintf(buf + off, buf_size - off, "\nNTB Incoming XLAT:\n");