NTB: Add split BAR output for debugfs stats

When split BAR is enabled, the driver needs to dump out the split BAR
registers rather than the original 64bit BAR registers.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

1 files changed, 68 insertions, 15 deletions

diff --git a/drivers/ntb/hw/intel/ntb_hw_intel.c b/drivers/ntb/hw/intel/ntb_hw_intel.c
index ba4dc0d7e1f3..87751cfd6f4f 100644
--- a/drivers/ntb/hw/intel/ntb_hw_intel.c
+++ b/drivers/ntb/hw/intel/ntb_hw_intel.c
@@ -632,17 +632,36 @@ static ssize_t ndev_debugfs_read(struct file *filp, char __user *ubuf,
         off += scnprintf(buf + off, buf_size - off,
                          "XLAT23 -\t\t%#018llx\n", u.v64);
 
-        u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 4));
-        off += scnprintf(buf + off, buf_size - off,
-                         "XLAT45 -\t\t%#018llx\n", u.v64);
+        if (ndev->bar4_split) {
+                u.v32 = ioread32(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 4));
+                off += scnprintf(buf + off, buf_size - off,
+                                 "XLAT4 -\t\t\t%#06x\n", u.v32);
+
+                u.v32 = ioread32(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 5));
+                off += scnprintf(buf + off, buf_size - off,
+                                 "XLAT5 -\t\t\t%#06x\n", u.v32);
+        } else {
+                u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 4));
+                off += scnprintf(buf + off, buf_size - off,
+                                 "XLAT45 -\t\t%#018llx\n", u.v64);
+        }
 
         u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 2));
         off += scnprintf(buf + off, buf_size - off,
                          "LMT23 -\t\t\t%#018llx\n", u.v64);
 
-        u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 4));
-        off += scnprintf(buf + off, buf_size - off,
-                         "LMT45 -\t\t\t%#018llx\n", u.v64);
+        if (ndev->bar4_split) {
+                u.v32 = ioread32(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 4));
+                off += scnprintf(buf + off, buf_size - off,
+                                 "LMT4 -\t\t\t%#06x\n", u.v32);
+                u.v32 = ioread32(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 5));
+                off += scnprintf(buf + off, buf_size - off,
+                                 "LMT5 -\t\t\t%#06x\n", u.v32);
+        } else {
+                u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 4));
+                off += scnprintf(buf + off, buf_size - off,
+                                 "LMT45 -\t\t\t%#018llx\n", u.v64);
+        }
 
         if (pdev_is_xeon(ndev->ntb.pdev)) {
                 if (ntb_topo_is_b2b(ndev->ntb.topo)) {
@@ -653,17 +672,41 @@ static ssize_t ndev_debugfs_read(struct file *filp, char __user *ubuf,
                         off += scnprintf(buf + off, buf_size - off,
                                          "B2B XLAT23 -\t\t%#018llx\n", u.v64);
 
-                        u.v64 = ioread64(mmio + XEON_PBAR45XLAT_OFFSET);
-                        off += scnprintf(buf + off, buf_size - off,
-                                         "B2B XLAT45 -\t\t%#018llx\n", u.v64);
+                        if (ndev->bar4_split) {
+                                u.v32 = ioread32(mmio + XEON_PBAR4XLAT_OFFSET);
+                                off += scnprintf(buf + off, buf_size - off,
+                                                 "B2B XLAT4 -\t\t%#06x\n",
+                                                 u.v32);
+                                u.v32 = ioread32(mmio + XEON_PBAR5XLAT_OFFSET);
+                                off += scnprintf(buf + off, buf_size - off,
+                                                 "B2B XLAT5 -\t\t%#06x\n",
+                                                 u.v32);
+                        } else {
+                                u.v64 = ioread64(mmio + XEON_PBAR45XLAT_OFFSET);
+                                off += scnprintf(buf + off, buf_size - off,
+                                                 "B2B XLAT45 -\t\t%#018llx\n",
+                                                 u.v64);
+                        }
 
                         u.v64 = ioread64(mmio + XEON_PBAR23LMT_OFFSET);
                         off += scnprintf(buf + off, buf_size - off,
                                          "B2B LMT23 -\t\t%#018llx\n", u.v64);
 
-                        u.v64 = ioread64(mmio + XEON_PBAR45LMT_OFFSET);
-                        off += scnprintf(buf + off, buf_size - off,
-                                         "B2B LMT45 -\t\t%#018llx\n", u.v64);
+                        if (ndev->bar4_split) {
+                                u.v32 = ioread32(mmio + XEON_PBAR4LMT_OFFSET);
+                                off += scnprintf(buf + off, buf_size - off,
+                                                 "B2B LMT4 -\t\t%#06x\n",
+                                                 u.v32);
+                                u.v32 = ioread32(mmio + XEON_PBAR5LMT_OFFSET);
+                                off += scnprintf(buf + off, buf_size - off,
+                                                 "B2B LMT5 -\t\t%#06x\n",
+                                                 u.v32);
+                        } else {
+                                u.v64 = ioread64(mmio + XEON_PBAR45LMT_OFFSET);
+                                off += scnprintf(buf + off, buf_size - off,
+                                                 "B2B LMT45 -\t\t%#018llx\n",
+                                                 u.v64);
+                        }
 
                         off += scnprintf(buf + off, buf_size - off,
                                          "\nNTB Secondary BAR:\n");
@@ -676,9 +719,19 @@ static ssize_t ndev_debugfs_read(struct file *filp, char __user *ubuf,
                         off += scnprintf(buf + off, buf_size - off,
                                          "SBAR23 -\t\t%#018llx\n", u.v64);
 
-                        u.v64 = ioread64(mmio + XEON_SBAR45BASE_OFFSET);
-                        off += scnprintf(buf + off, buf_size - off,
-                                         "SBAR45 -\t\t%#018llx\n", u.v64);
+                        if (ndev->bar4_split) {
+                                u.v32 = ioread32(mmio + XEON_SBAR4BASE_OFFSET);
+                                off += scnprintf(buf + off, buf_size - off,
+                                                 "SBAR4 -\t\t\t%#06x\n", u.v32);
+                                u.v32 = ioread32(mmio + XEON_SBAR5BASE_OFFSET);
+                                off += scnprintf(buf + off, buf_size - off,
+                                                 "SBAR5 -\t\t\t%#06x\n", u.v32);
+                        } else {
+                                u.v64 = ioread64(mmio + XEON_SBAR45BASE_OFFSET);
+                                off += scnprintf(buf + off, buf_size - off,
+                                                 "SBAR45 -\t\t%#018llx\n",
+                                                 u.v64);
+                        }
                 }
 
                 off += scnprintf(buf + off, buf_size - off,