diff options
| author |   Allen Hubbe <Allen.Hubbe@emc.com> | 2016-07-22 09:38:22 -0400 |
|---|---|---|
| committer |   Jon Mason <jdmason@kudzu.us> | 2016-08-05 10:33:47 -0400 |
| commit | 4089527388808ca380af908fdbdd3d723cc9e751 (patch) | |
| tree | a9f6b02e96ba95bb91000ca6f72450189e087949 /drivers/ntb | |
| parent | ntb_test: Add a selftest script for the NTB subsystem (diff) | |
| download | linux-dev-4089527388808ca380af908fdbdd3d723cc9e751.tar.xz linux-dev-4089527388808ca380af908fdbdd3d723cc9e751.zip | |
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 <Allen.Hubbe@emc.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb')
| -rw-r--r-- | drivers/ntb/hw/intel/ntb_hw_intel.c | 39 |
1 files changed, 38 insertions, 1 deletions
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); @@ -632,6 +634,41 @@ static ssize_t ndev_debugfs_read(struct file *filp, char __user *ubuf, "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"); u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 2)); |