[RFC v3 07/10] fsl_bman: Add debugfs support
From: Emil Medve
Date: Mon Mar 09 2015 - 10:51:03 EST
From: Geoff Thorpe <Geoff.Thorpe@xxxxxxxxxxxxx>
Signed-off-by: Geoff Thorpe <Geoff.Thorpe@xxxxxxxxxxxxx>
---
drivers/soc/fsl/Kconfig | 7 +++
drivers/soc/fsl/Makefile | 1 +
drivers/soc/fsl/bman_api.c | 19 +++++++
drivers/soc/fsl/bman_debugfs.c | 118 +++++++++++++++++++++++++++++++++++++++++
drivers/soc/fsl/dpaa_sys.h | 1 +
include/soc/fsl/bman.h | 6 +++
6 files changed, 152 insertions(+)
create mode 100644 drivers/soc/fsl/bman_debugfs.c
diff --git a/drivers/soc/fsl/Kconfig b/drivers/soc/fsl/Kconfig
index e00f2bf..eaede8b 100644
--- a/drivers/soc/fsl/Kconfig
+++ b/drivers/soc/fsl/Kconfig
@@ -73,6 +73,13 @@ config FSL_BMAN_TEST_THRESH
"drainer" thread, and the other threads that they observe exactly
the depletion state changes that are expected.
+config FSL_BMAN_DEBUGFS
+ tristate "BMan debugfs interface"
+ depends on DEBUG_FS
+ default y
+ ---help---
+ This option compiles debugfs code for BMan.
+
endif # FSL_BMAN
config FSL_QMAN
diff --git a/drivers/soc/fsl/Makefile b/drivers/soc/fsl/Makefile
index bd0fd91..a991e18 100644
--- a/drivers/soc/fsl/Makefile
+++ b/drivers/soc/fsl/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_FSL_BMAN_TEST) += bman_tester.o
bman_tester-y = bman_test.o
bman_tester-$(CONFIG_FSL_BMAN_TEST_API) += bman_test_api.o
bman_tester-$(CONFIG_FSL_BMAN_TEST_THRESH) += bman_test_thresh.o
+obj-$(CONFIG_FSL_BMAN_DEBUGFS) += bman_debugfs.o
obj-$(CONFIG_FSL_QMAN) += qman_api.o qman_utils.o
obj-$(CONFIG_FSL_QMAN_CONFIG) += qman.o qman_portal.o
diff --git a/drivers/soc/fsl/bman_api.c b/drivers/soc/fsl/bman_api.c
index 8de4973..1a6a440 100644
--- a/drivers/soc/fsl/bman_api.c
+++ b/drivers/soc/fsl/bman_api.c
@@ -996,6 +996,25 @@ int bman_flush_stockpile(struct bman_pool *pool, u32 flags)
}
EXPORT_SYMBOL(bman_flush_stockpile);
+int bman_query_pools(struct bm_pool_state *state)
+{
+ struct bman_portal *p = get_affine_portal();
+ struct bm_mc_result *mcr;
+ __maybe_unused unsigned long irqflags;
+
+ PORTAL_IRQ_LOCK(p, irqflags);
+ bm_mc_start(&p->p);
+ bm_mc_commit(&p->p, BM_MCC_VERB_CMD_QUERY);
+ while (!(mcr = bm_mc_result(&p->p)))
+ cpu_relax();
+ DPA_ASSERT((mcr->verb & BM_MCR_VERB_CMD_MASK) == BM_MCR_VERB_CMD_QUERY);
+ *state = mcr->query;
+ PORTAL_IRQ_UNLOCK(p, irqflags);
+ put_affine_portal();
+ return 0;
+}
+EXPORT_SYMBOL(bman_query_pools);
+
#ifdef CONFIG_FSL_BMAN_CONFIG
u32 bman_query_free_buffers(struct bman_pool *pool)
{
diff --git a/drivers/soc/fsl/bman_debugfs.c b/drivers/soc/fsl/bman_debugfs.c
new file mode 100644
index 0000000..df451de
--- /dev/null
+++ b/drivers/soc/fsl/bman_debugfs.c
@@ -0,0 +1,118 @@
+/* Copyright 2010 - 2015 Freescale Semiconductor, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Freescale Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <linux/module.h>
+#include <soc/fsl/bman.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/uaccess.h>
+
+static struct dentry *dfs_root; /* debugfs root directory */
+
+/*******************************************************************************
+ * Query Buffer Pool State
+ ******************************************************************************/
+static int query_bp_state_show(struct seq_file *file, void *offset)
+{
+ int ret;
+ struct bm_pool_state state;
+ int i, j;
+ u32 mask;
+
+ memset(&state, 0, sizeof(struct bm_pool_state));
+ ret = bman_query_pools(&state);
+ if (ret) {
+ seq_printf(file, "Error %d\n", ret);
+ return 0;
+ }
+ seq_puts(file, "bp_id free_buffers_avail bp_depleted\n");
+ for (i = 0; i < 2; i++) {
+ mask = 0x80000000;
+ for (j = 0; j < 32; j++) {
+ seq_printf(file,
+ " %-2u %-3s %-3s\n",
+ (i*32)+j,
+ (state.as.state.__state[i] & mask) ? "no" : "yes",
+ (state.ds.state.__state[i] & mask) ? "yes" : "no");
+ mask >>= 1;
+ }
+ }
+ return 0;
+}
+
+static int query_bp_state_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, query_bp_state_show, NULL);
+}
+
+static const struct file_operations query_bp_state_fops = {
+ .owner = THIS_MODULE,
+ .open = query_bp_state_open,
+ .read = seq_read,
+ .release = single_release,
+};
+
+static int __init bman_debugfs_module_init(void)
+{
+ int ret = 0;
+ struct dentry *d;
+
+ dfs_root = debugfs_create_dir("bman", NULL);
+
+ if (dfs_root == NULL) {
+ ret = -ENOMEM;
+ pr_err("Cannot create bman debugfs dir\n");
+ goto _return;
+ }
+ d = debugfs_create_file("query_bp_state",
+ S_IRUGO,
+ dfs_root,
+ NULL,
+ &query_bp_state_fops);
+ if (d == NULL) {
+ ret = -ENOMEM;
+ pr_err("Cannot create query_bp_state\n");
+ goto _return;
+ }
+ return 0;
+
+_return:
+ debugfs_remove_recursive(dfs_root);
+ return ret;
+}
+
+static void __exit bman_debugfs_module_exit(void)
+{
+ debugfs_remove_recursive(dfs_root);
+}
+
+
+module_init(bman_debugfs_module_init);
+module_exit(bman_debugfs_module_exit);
+MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/soc/fsl/dpaa_sys.h b/drivers/soc/fsl/dpaa_sys.h
index 4230021..0913dd4 100644
--- a/drivers/soc/fsl/dpaa_sys.h
+++ b/drivers/soc/fsl/dpaa_sys.h
@@ -53,6 +53,7 @@
#include <linux/ioctl.h>
#include <linux/miscdevice.h>
#include <linux/uaccess.h>
+#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/device.h>
#include <linux/smp.h>
diff --git a/include/soc/fsl/bman.h b/include/soc/fsl/bman.h
index 1eab818..6e58168 100644
--- a/include/soc/fsl/bman.h
+++ b/include/soc/fsl/bman.h
@@ -480,6 +480,12 @@ int bman_acquire(struct bman_pool *pool, struct bm_buffer *bufs, u8 num,
*/
int bman_flush_stockpile(struct bman_pool *pool, u32 flags);
+/**
+ * bman_query_pools - Query all buffer pool states
+ * @state: storage for the queried availability and depletion states
+ */
+int bman_query_pools(struct bm_pool_state *state);
+
#ifdef CONFIG_FSL_BMAN_CONFIG
/**
* bman_query_free_buffers - Query how many free buffers are in buffer pool
--
2.3.0
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