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NTB: ntb_hw_intel: show BAR size in debugfs info

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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>
This commit is contained in:
Allen Hubbe 2016-07-22 09:38:22 -04:00 committed by Jon Mason
parent a9c59ef774
commit 4089527388
1 changed files with 38 additions and 1 deletions
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39
drivers/ntb/hw/intel/ntb_hw_intel.c
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@ -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");