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Date: Fri, 31 May 2013 19:34:14 -0500
From: "Philip J. Kelleher" <pjk1939@...ux.vnet.ibm.com>
To: axboe@...nel.dk
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 7/8] rsxx: Adding in debugfs entries.
From: Philip J Kelleher <pjk1939@...ux.vnet.ibm.com>
Adding debugfs entries to help with debugging and testing and
testing code.
pci_regs:
This entry will spit out all of the data stored on the BAR.
stats:
This entry will display all of the driver stats for each
DMA channel.
Signed-off-by: Philip J Kelleher <pjk1939@...ux.vnet.ibm.com>
-------------------------------------------------------------------------------
diff -uprN -X linux-block/Documentation/dontdiff linux-block-vanilla/drivers/block/rsxx/core.c linux-block/drivers/block/rsxx/core.c
--- linux-block-vanilla/drivers/block/rsxx/core.c 2013-05-31 16:33:27.666140484 -0500
+++ linux-block/drivers/block/rsxx/core.c 2013-05-31 17:48:10.519527250 -0500
@@ -31,6 +31,8 @@
#include <linux/slab.h>
#include <linux/bitops.h>
#include <linux/delay.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
#include <linux/genhd.h>
#include <linux/idr.h>
@@ -52,6 +54,168 @@ MODULE_PARM_DESC(force_legacy, "Force th
static DEFINE_IDA(rsxx_disk_ida);
static DEFINE_SPINLOCK(rsxx_ida_lock);
+/* --------------------Debugfs Setup ------------------- */
+
+static int rsxx_attr_pci_regs_show(struct seq_file *m, void *p)
+{
+ struct rsxx_cardinfo *card = m->private;
+
+ seq_printf(m, "HWID 0x%08x\n",
+ ioread32(card->regmap + HWID));
+ seq_printf(m, "SCRATCH 0x%08x\n",
+ ioread32(card->regmap + SCRATCH));
+ seq_printf(m, "IER 0x%08x\n",
+ ioread32(card->regmap + IER));
+ seq_printf(m, "IPR 0x%08x\n",
+ ioread32(card->regmap + IPR));
+ seq_printf(m, "CREG_CMD 0x%08x\n",
+ ioread32(card->regmap + CREG_CMD));
+ seq_printf(m, "CREG_ADD 0x%08x\n",
+ ioread32(card->regmap + CREG_ADD));
+ seq_printf(m, "CREG_CNT 0x%08x\n",
+ ioread32(card->regmap + CREG_CNT));
+ seq_printf(m, "CREG_STAT 0x%08x\n",
+ ioread32(card->regmap + CREG_STAT));
+ seq_printf(m, "CREG_DATA0 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA0));
+ seq_printf(m, "CREG_DATA1 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA1));
+ seq_printf(m, "CREG_DATA2 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA2));
+ seq_printf(m, "CREG_DATA3 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA3));
+ seq_printf(m, "CREG_DATA4 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA4));
+ seq_printf(m, "CREG_DATA5 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA5));
+ seq_printf(m, "CREG_DATA6 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA6));
+ seq_printf(m, "CREG_DATA7 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA7));
+ seq_printf(m, "INTR_COAL 0x%08x\n",
+ ioread32(card->regmap + INTR_COAL));
+ seq_printf(m, "HW_ERROR 0x%08x\n",
+ ioread32(card->regmap + HW_ERROR));
+ seq_printf(m, "DEBUG0 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG0));
+ seq_printf(m, "DEBUG1 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG1));
+ seq_printf(m, "DEBUG2 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG2));
+ seq_printf(m, "DEBUG3 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG3));
+ seq_printf(m, "DEBUG4 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG4));
+ seq_printf(m, "DEBUG5 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG5));
+ seq_printf(m, "DEBUG6 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG6));
+ seq_printf(m, "DEBUG7 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG7));
+ seq_printf(m, "RECONFIG 0x%08x\n",
+ ioread32(card->regmap + PCI_RECONFIG));
+
+ return 0;
+}
+
+static int rsxx_attr_stats_show(struct seq_file *m, void *p)
+{
+ struct rsxx_cardinfo *card = m->private;
+ int i;
+
+ for (i = 0; i < card->n_targets; i++) {
+ seq_printf(m, "Ctrl %d CRC Errors = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d Hard Errors = %d\n",
+ i, card->ctrl[i].stats.hard_errors);
+ seq_printf(m, "Ctrl %d Soft Errors = %d\n",
+ i, card->ctrl[i].stats.soft_errors);
+ seq_printf(m, "Ctrl %d Writes Issued = %d\n",
+ i, card->ctrl[i].stats.writes_issued);
+ seq_printf(m, "Ctrl %d Writes Failed = %d\n",
+ i, card->ctrl[i].stats.writes_failed);
+ seq_printf(m, "Ctrl %d Reads Issued = %d\n",
+ i, card->ctrl[i].stats.reads_issued);
+ seq_printf(m, "Ctrl %d Reads Failed = %d\n",
+ i, card->ctrl[i].stats.reads_failed);
+ seq_printf(m, "Ctrl %d Reads Retried = %d\n",
+ i, card->ctrl[i].stats.reads_retried);
+ seq_printf(m, "Ctrl %d Discards Issued = %d\n",
+ i, card->ctrl[i].stats.discards_issued);
+ seq_printf(m, "Ctrl %d Discards Failed = %d\n",
+ i, card->ctrl[i].stats.discards_failed);
+ seq_printf(m, "Ctrl %d DMA SW Errors = %d\n",
+ i, card->ctrl[i].stats.dma_sw_err);
+ seq_printf(m, "Ctrl %d DMA HW Faults = %d\n",
+ i, card->ctrl[i].stats.dma_hw_fault);
+ seq_printf(m, "Ctrl %d DMAs Cancelled = %d\n",
+ i, card->ctrl[i].stats.dma_cancelled);
+ seq_printf(m, "Ctrl %d SW Queue Depth = %d\n",
+ i, card->ctrl[i].stats.sw_q_depth);
+ seq_printf(m, "Ctrl %d HW Queue Depth = %d\n",
+ i, atomic_read(&card->ctrl[i].stats.hw_q_depth));
+ }
+
+ return 0;
+}
+
+static int rsxx_attr_stats_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, rsxx_attr_stats_show, inode->i_private);
+}
+
+static int rsxx_attr_pci_regs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, rsxx_attr_pci_regs_show, inode->i_private);
+}
+
+static const struct file_operations debugfs_stats_fops = {
+ .owner = THIS_MODULE,
+ .open = rsxx_attr_stats_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static const struct file_operations debugfs_pci_regs_fops = {
+ .owner = THIS_MODULE,
+ .open = rsxx_attr_pci_regs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void rsxx_debugfs_dev_new(struct rsxx_cardinfo *card)
+{
+ struct dentry *debugfs_stats;
+ struct dentry *debugfs_pci_regs;
+
+ card->debugfs_dir = debugfs_create_dir(card->gendisk->disk_name, NULL);
+ if (IS_ERR_OR_NULL(card->debugfs_dir))
+ goto failed_debugfs_dir;
+
+ debugfs_stats = debugfs_create_file("stats", S_IRUGO,
+ card->debugfs_dir, card,
+ &debugfs_stats_fops);
+ if (IS_ERR_OR_NULL(debugfs_stats))
+ goto failed_debugfs_stats;
+
+ debugfs_pci_regs = debugfs_create_file("pci_regs", S_IRUGO,
+ card->debugfs_dir, card,
+ &debugfs_pci_regs_fops);
+ if (IS_ERR_OR_NULL(debugfs_pci_regs))
+ goto failed_debugfs_pci_regs;
+
+ return;
+
+failed_debugfs_pci_regs:
+ debugfs_remove(debugfs_stats);
+failed_debugfs_stats:
+ debugfs_remove(card->debugfs_dir);
+failed_debugfs_dir:
+ card->debugfs_dir = NULL;
+}
+
/*----------------- Interrupt Control & Handling -------------------*/
static void rsxx_mask_interrupts(struct rsxx_cardinfo *card)
@@ -707,6 +871,9 @@ static int rsxx_pci_probe(struct pci_dev
rsxx_attach_dev(card);
+ /************* Setup Debugfs *************/
+ rsxx_debugfs_dev_new(card);
+
return 0;
failed_create_dev:
@@ -784,6 +951,8 @@ static void rsxx_pci_remove(struct pci_d
/* Prevent work_structs from re-queuing themselves. */
card->halt = 1;
+ debugfs_remove_recursive(card->debugfs_dir);
+
free_irq(dev->irq, card);
if (!force_legacy)
diff -uprN -X linux-block/Documentation/dontdiff linux-block-vanilla/drivers/block/rsxx/rsxx_priv.h linux-block/drivers/block/rsxx/rsxx_priv.h
--- linux-block-vanilla/drivers/block/rsxx/rsxx_priv.h 2013-05-31 17:02:35.371019402 -0500
+++ linux-block/drivers/block/rsxx/rsxx_priv.h 2013-05-31 17:49:36.910019132 -0500
@@ -185,6 +185,8 @@ struct rsxx_cardinfo {
int n_targets;
struct rsxx_dma_ctrl *ctrl;
+
+ struct dentry *debugfs_dir;
};
enum rsxx_pci_regmap {
--
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