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Commit 40895273 authored by Allen Hubbe's avatar Allen Hubbe Committed by Jon Mason
Browse files

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: default avatarAllen Hubbe <Allen.Hubbe@emc.com>
Acked-by: default avatarDave Jiang <dave.jiang@intel.com>
Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
parent a9c59ef7

drivers/ntb/hw/intel/ntb_hw_intel.c

+38 −1
Original line number Diff line number Diff line
@@ -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");