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authorJon Mason <jon.mason@intel.com>2014-04-07 10:55:47 -0700
committerJon Mason <jdmason@kudzu.us>2014-10-17 07:08:50 -0400
commit6465d02ee15f7a45339b7e7859d0a0f22100ca87 (patch)
treeb0554823791bb6b366734c16d241783d6ecf3149 /drivers/ntb
parentbfe01a5ba2490f299e1d2d5508cbbbadd897bbe9 (diff)
downloadlinux-6465d02ee15f7a45339b7e7859d0a0f22100ca87.tar.gz
NTB: debugfs device entry
Create a debugfs entry for the NTB device to log the basic device info, as well as display the error count on a number of registers. Signed-off-by: Jon Mason <jon.mason@intel.com>
Diffstat (limited to 'drivers/ntb')
-rw-r--r--drivers/ntb/ntb_hw.c101
-rw-r--r--drivers/ntb/ntb_hw.h1
-rw-r--r--drivers/ntb/ntb_regs.h7
3 files changed, 107 insertions, 2 deletions
diff --git a/drivers/ntb/ntb_hw.c b/drivers/ntb/ntb_hw.c
index 372e08c4ffef..a3990363a171 100644
--- a/drivers/ntb/ntb_hw.c
+++ b/drivers/ntb/ntb_hw.c
@@ -1344,6 +1344,101 @@ static void ntb_free_callbacks(struct ntb_device *ndev)
kfree(ndev->db_cb);
}
+static ssize_t ntb_debugfs_read(struct file *filp, char __user *ubuf,
+ size_t count, loff_t *offp)
+{
+ struct ntb_device *ndev;
+ char *buf;
+ ssize_t ret, offset, out_count;
+
+ out_count = 500;
+
+ buf = kmalloc(out_count, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ ndev = filp->private_data;
+ offset = 0;
+ offset += snprintf(buf + offset, out_count - offset,
+ "NTB Device Information:\n");
+ offset += snprintf(buf + offset, out_count - offset,
+ "Connection Type - \t\t%s\n",
+ ndev->conn_type == NTB_CONN_TRANSPARENT ?
+ "Transparent" : (ndev->conn_type == NTB_CONN_B2B) ?
+ "Back to back" : "Root Port");
+ offset += snprintf(buf + offset, out_count - offset,
+ "Device Type - \t\t\t%s\n",
+ ndev->dev_type == NTB_DEV_USD ?
+ "DSD/USP" : "USD/DSP");
+ offset += snprintf(buf + offset, out_count - offset,
+ "Max Number of Callbacks - \t%u\n",
+ ntb_max_cbs(ndev));
+ offset += snprintf(buf + offset, out_count - offset,
+ "Link Status - \t\t\t%s\n",
+ ntb_hw_link_status(ndev) ? "Up" : "Down");
+ if (ntb_hw_link_status(ndev)) {
+ offset += snprintf(buf + offset, out_count - offset,
+ "Link Speed - \t\t\tPCI-E Gen %u\n",
+ ndev->link_speed);
+ offset += snprintf(buf + offset, out_count - offset,
+ "Link Width - \t\t\tx%u\n",
+ ndev->link_width);
+ }
+
+ if (ndev->hw_type != BWD_HW) {
+ u32 status32;
+ u16 status16;
+ int rc;
+
+ offset += snprintf(buf + offset, out_count - offset,
+ "\nNTB Device Statistics:\n");
+ offset += snprintf(buf + offset, out_count - offset,
+ "Upstream Memory Miss - \t%u\n",
+ readw(ndev->reg_base +
+ SNB_USMEMMISS_OFFSET));
+
+ offset += snprintf(buf + offset, out_count - offset,
+ "\nNTB Hardware Errors:\n");
+
+ rc = pci_read_config_word(ndev->pdev, SNB_DEVSTS_OFFSET,
+ &status16);
+ if (!rc)
+ offset += snprintf(buf + offset, out_count - offset,
+ "DEVSTS - \t%#06x\n", status16);
+
+ rc = pci_read_config_word(ndev->pdev, SNB_LINK_STATUS_OFFSET,
+ &status16);
+ if (!rc)
+ offset += snprintf(buf + offset, out_count - offset,
+ "LNKSTS - \t%#06x\n", status16);
+
+ rc = pci_read_config_dword(ndev->pdev, SNB_UNCERRSTS_OFFSET,
+ &status32);
+ if (!rc)
+ offset += snprintf(buf + offset, out_count - offset,
+ "UNCERRSTS - \t%#010x\n", status32);
+
+ rc = pci_read_config_dword(ndev->pdev, SNB_CORERRSTS_OFFSET,
+ &status32);
+ if (!rc)
+ offset += snprintf(buf + offset, out_count - offset,
+ "CORERRSTS - \t%#010x\n", status32);
+ }
+
+ if (offset > out_count)
+ offset = out_count;
+
+ ret = simple_read_from_buffer(ubuf, count, offp, buf, offset);
+ kfree(buf);
+ return ret;
+}
+
+static const struct file_operations ntb_debugfs_info = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = ntb_debugfs_read,
+};
+
static void ntb_setup_debugfs(struct ntb_device *ndev)
{
if (!debugfs_initialized())
@@ -1354,6 +1449,11 @@ static void ntb_setup_debugfs(struct ntb_device *ndev)
ndev->debugfs_dir = debugfs_create_dir(pci_name(ndev->pdev),
debugfs_dir);
+ if (ndev->debugfs_dir)
+ ndev->debugfs_info = debugfs_create_file("info", S_IRUSR,
+ ndev->debugfs_dir,
+ ndev,
+ &ntb_debugfs_info);
}
static void ntb_free_debugfs(struct ntb_device *ndev)
@@ -1542,4 +1642,5 @@ static struct pci_driver ntb_pci_driver = {
.probe = ntb_pci_probe,
.remove = ntb_pci_remove,
};
+
module_pci_driver(ntb_pci_driver);
diff --git a/drivers/ntb/ntb_hw.h b/drivers/ntb/ntb_hw.h
index 465517b7393e..ddbcbfda0f49 100644
--- a/drivers/ntb/ntb_hw.h
+++ b/drivers/ntb/ntb_hw.h
@@ -152,6 +152,7 @@ struct ntb_device {
struct delayed_work lr_timer;
struct dentry *debugfs_dir;
+ struct dentry *debugfs_info;
};
/**
diff --git a/drivers/ntb/ntb_regs.h b/drivers/ntb/ntb_regs.h
index 9774506419d7..07872057c76e 100644
--- a/drivers/ntb/ntb_regs.h
+++ b/drivers/ntb/ntb_regs.h
@@ -62,10 +62,13 @@
#define SNB_DB_HW_LINK 0x8000
+#define SNB_UNCERRSTS_OFFSET 0x014C
+#define SNB_CORERRSTS_OFFSET 0x0158
+#define SNB_LINK_STATUS_OFFSET 0x01A2
#define SNB_PCICMD_OFFSET 0x0504
#define SNB_DEVCTRL_OFFSET 0x0598
+#define SNB_DEVSTS_OFFSET 0x059A
#define SNB_SLINK_STATUS_OFFSET 0x05A2
-#define SNB_LINK_STATUS_OFFSET 0x01A2
#define SNB_PBAR2LMT_OFFSET 0x0000
#define SNB_PBAR4LMT_OFFSET 0x0008
@@ -84,7 +87,7 @@
#define SNB_PDBMSK_OFFSET 0x0062
#define SNB_SDOORBELL_OFFSET 0x0064
#define SNB_SDBMSK_OFFSET 0x0066
-#define SNB_USMEMMISS 0x0070
+#define SNB_USMEMMISS_OFFSET 0x0070
#define SNB_SPAD_OFFSET 0x0080
#define SNB_SPADSEMA4_OFFSET 0x00c0
#define SNB_WCCNTRL_OFFSET 0x00e0