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-rw-r--r--drivers/ntb/ntb_hw.c41
-rw-r--r--drivers/ntb/ntb_hw.h16
-rw-r--r--drivers/ntb/ntb_regs.h4
-rw-r--r--drivers/ntb/ntb_transport.c17
4 files changed, 60 insertions, 18 deletions
diff --git a/drivers/ntb/ntb_hw.c b/drivers/ntb/ntb_hw.c
index 2dacd19e1b8..b9bf8b551e3 100644
--- a/drivers/ntb/ntb_hw.c
+++ b/drivers/ntb/ntb_hw.c
@@ -78,6 +78,8 @@ enum {
BWD_HW,
};
+static struct dentry *debugfs_dir;
+
/* Translate memory window 0,1 to BAR 2,4 */
#define MW_TO_BAR(mw) (mw * 2 + 2)
@@ -531,9 +533,9 @@ static int ntb_xeon_setup(struct ntb_device *ndev)
}
if (val & SNB_PPD_DEV_TYPE)
- ndev->dev_type = NTB_DEV_DSD;
- else
ndev->dev_type = NTB_DEV_USD;
+ else
+ ndev->dev_type = NTB_DEV_DSD;
ndev->reg_ofs.pdb = ndev->reg_base + SNB_PDOORBELL_OFFSET;
ndev->reg_ofs.pdb_mask = ndev->reg_base + SNB_PDBMSK_OFFSET;
@@ -547,7 +549,7 @@ static int ntb_xeon_setup(struct ntb_device *ndev)
if (ndev->conn_type == NTB_CONN_B2B) {
ndev->reg_ofs.sdb = ndev->reg_base + SNB_B2B_DOORBELL_OFFSET;
ndev->reg_ofs.spad_write = ndev->reg_base + SNB_B2B_SPAD_OFFSET;
- ndev->limits.max_spads = SNB_MAX_SPADS;
+ ndev->limits.max_spads = SNB_MAX_B2B_SPADS;
} else {
ndev->reg_ofs.sdb = ndev->reg_base + SNB_SDOORBELL_OFFSET;
ndev->reg_ofs.spad_write = ndev->reg_base + SNB_SPAD_OFFSET;
@@ -644,10 +646,16 @@ static int ntb_device_setup(struct ntb_device *ndev)
rc = -ENODEV;
}
+ if (rc)
+ return rc;
+
+ dev_info(&ndev->pdev->dev, "Device Type = %s\n",
+ ndev->dev_type == NTB_DEV_USD ? "USD/DSP" : "DSD/USP");
+
/* Enable Bus Master and Memory Space on the secondary side */
writew(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER, ndev->reg_ofs.spci_cmd);
- return rc;
+ return 0;
}
static void ntb_device_free(struct ntb_device *ndev)
@@ -992,6 +1000,28 @@ static void ntb_free_callbacks(struct ntb_device *ndev)
kfree(ndev->db_cb);
}
+static void ntb_setup_debugfs(struct ntb_device *ndev)
+{
+ if (!debugfs_initialized())
+ return;
+
+ if (!debugfs_dir)
+ debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
+
+ ndev->debugfs_dir = debugfs_create_dir(pci_name(ndev->pdev),
+ debugfs_dir);
+}
+
+static void ntb_free_debugfs(struct ntb_device *ndev)
+{
+ debugfs_remove_recursive(ndev->debugfs_dir);
+
+ if (debugfs_dir && simple_empty(debugfs_dir)) {
+ debugfs_remove_recursive(debugfs_dir);
+ debugfs_dir = NULL;
+ }
+}
+
static int ntb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct ntb_device *ndev;
@@ -1004,6 +1034,7 @@ static int ntb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
ndev->pdev = pdev;
ndev->link_status = NTB_LINK_DOWN;
pci_set_drvdata(pdev, ndev);
+ ntb_setup_debugfs(ndev);
rc = pci_enable_device(pdev);
if (rc)
@@ -1100,6 +1131,7 @@ err2:
err1:
pci_disable_device(pdev);
err:
+ ntb_free_debugfs(ndev);
kfree(ndev);
dev_err(&pdev->dev, "Error loading %s module\n", KBUILD_MODNAME);
@@ -1129,6 +1161,7 @@ static void ntb_pci_remove(struct pci_dev *pdev)
iounmap(ndev->reg_base);
pci_release_selected_regions(pdev, NTB_BAR_MASK);
pci_disable_device(pdev);
+ ntb_free_debugfs(ndev);
kfree(ndev);
}
diff --git a/drivers/ntb/ntb_hw.h b/drivers/ntb/ntb_hw.h
index 3a3038ca83e..6a4f56f564e 100644
--- a/drivers/ntb/ntb_hw.h
+++ b/drivers/ntb/ntb_hw.h
@@ -127,6 +127,8 @@ struct ntb_device {
unsigned char link_status;
struct delayed_work hb_timer;
unsigned long last_ts;
+
+ struct dentry *debugfs_dir;
};
/**
@@ -155,6 +157,20 @@ static inline struct pci_dev *ntb_query_pdev(struct ntb_device *ndev)
return ndev->pdev;
}
+/**
+ * ntb_query_debugfs() - return the debugfs pointer
+ * @ndev: pointer to ntb_device instance
+ *
+ * Given the ntb pointer, return the debugfs directory pointer for the NTB
+ * hardware device
+ *
+ * RETURNS: a pointer to the debugfs directory
+ */
+static inline struct dentry *ntb_query_debugfs(struct ntb_device *ndev)
+{
+ return ndev->debugfs_dir;
+}
+
struct ntb_device *ntb_register_transport(struct pci_dev *pdev,
void *transport);
void ntb_unregister_transport(struct ntb_device *ndev);
diff --git a/drivers/ntb/ntb_regs.h b/drivers/ntb/ntb_regs.h
index 5bfa8c06c05..96209b4abc2 100644
--- a/drivers/ntb/ntb_regs.h
+++ b/drivers/ntb/ntb_regs.h
@@ -53,8 +53,8 @@
#define NTB_LINK_WIDTH_MASK 0x03f0
#define SNB_MSIX_CNT 4
-#define SNB_MAX_SPADS 16
-#define SNB_MAX_COMPAT_SPADS 8
+#define SNB_MAX_B2B_SPADS 16
+#define SNB_MAX_COMPAT_SPADS 16
/* Reserve the uppermost bit for link interrupt */
#define SNB_MAX_DB_BITS 15
#define SNB_DB_BITS_PER_VEC 5
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index f8d7081ee30..c3089151aa4 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -157,7 +157,6 @@ struct ntb_transport {
bool transport_link;
struct delayed_work link_work;
struct work_struct link_cleanup;
- struct dentry *debugfs_dir;
};
enum {
@@ -824,12 +823,12 @@ static void ntb_transport_init_queue(struct ntb_transport *nt,
qp->tx_max_frame = min(transport_mtu, tx_size / 2);
qp->tx_max_entry = tx_size / qp->tx_max_frame;
- if (nt->debugfs_dir) {
+ if (ntb_query_debugfs(nt->ndev)) {
char debugfs_name[4];
snprintf(debugfs_name, 4, "qp%d", qp_num);
qp->debugfs_dir = debugfs_create_dir(debugfs_name,
- nt->debugfs_dir);
+ ntb_query_debugfs(nt->ndev));
qp->debugfs_stats = debugfs_create_file("stats", S_IRUSR,
qp->debugfs_dir, qp,
@@ -857,11 +856,6 @@ int ntb_transport_init(struct pci_dev *pdev)
if (!nt)
return -ENOMEM;
- if (debugfs_initialized())
- nt->debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
- else
- nt->debugfs_dir = NULL;
-
nt->ndev = ntb_register_transport(pdev, nt);
if (!nt->ndev) {
rc = -EIO;
@@ -907,7 +901,6 @@ err2:
err1:
ntb_unregister_transport(nt->ndev);
err:
- debugfs_remove_recursive(nt->debugfs_dir);
kfree(nt);
return rc;
}
@@ -921,16 +914,16 @@ void ntb_transport_free(void *transport)
nt->transport_link = NTB_LINK_DOWN;
/* verify that all the qp's are freed */
- for (i = 0; i < nt->max_qps; i++)
+ for (i = 0; i < nt->max_qps; i++) {
if (!test_bit(i, &nt->qp_bitmap))
ntb_transport_free_queue(&nt->qps[i]);
+ debugfs_remove_recursive(nt->qps[i].debugfs_dir);
+ }
ntb_bus_remove(nt);
cancel_delayed_work_sync(&nt->link_work);
- debugfs_remove_recursive(nt->debugfs_dir);
-
ntb_unregister_event_callback(nt->ndev);
pdev = ntb_query_pdev(nt->ndev);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-19 12:06:07 +0000