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Date: Tue, 27 Jan 2015 13:47:47 +0530
From: Hariprasad Shenai <hariprasad@...lsio.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, leedom@...lsio.com, anish@...lsio.com,
nirranjan@...lsio.com, praveenm@...lsio.com,
Hariprasad Shenai <hariprasad@...lsio.com>
Subject: [PATCH net-next 3/5] cxgb4: Addded support in debugfs to dump CIM outbound queue content
Signed-off-by: Hariprasad Shenai <hariprasad@...lsio.com>
---
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | 2 +
drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c | 57 ++++++++++++++++++++
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 43 +++++++++++++++
drivers/net/ethernet/chelsio/cxgb4/t4_hw.h | 1 +
drivers/net/ethernet/chelsio/cxgb4/t4_regs.h | 16 ++++++
5 files changed, 119 insertions(+), 0 deletions(-)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index 368b5ad..da94b9a 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -1056,6 +1056,8 @@ int t4_edc_read(struct adapter *adap, int idx, u32 addr, __be32 *data,
u64 *parity);
int t4_read_cim_ibq(struct adapter *adap, unsigned int qid, u32 *data,
size_t n);
+int t4_read_cim_obq(struct adapter *adap, unsigned int qid, u32 *data,
+ size_t n);
int t4_cim_read(struct adapter *adap, unsigned int addr, unsigned int n,
unsigned int *valp);
int t4_cim_write(struct adapter *adap, unsigned int addr, unsigned int n,
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
index 3f4b07e..4619bb3 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
@@ -104,6 +104,17 @@ struct seq_tab *seq_open_tab(struct file *f, unsigned int rows,
return p;
}
+/* Trim the size of a seq_tab to the supplied number of rows. The operation is
+ * irreversible.
+ */
+static int seq_tab_trim(struct seq_tab *p, unsigned int new_rows)
+{
+ if (new_rows > p->rows)
+ return -EINVAL;
+ p->rows = new_rows;
+ return 0;
+}
+
static int cim_la_show(struct seq_file *seq, void *v, int idx)
{
if (v == SEQ_START_TOKEN)
@@ -275,6 +286,35 @@ static const struct file_operations cim_ibq_fops = {
.release = seq_release_private
};
+static int cim_obq_open(struct inode *inode, struct file *file)
+{
+ int ret;
+ struct seq_tab *p;
+ unsigned int qid = (uintptr_t)inode->i_private & 7;
+ struct adapter *adap = inode->i_private - qid;
+
+ p = seq_open_tab(file, 6 * CIM_OBQ_SIZE, 4 * sizeof(u32), 0, cimq_show);
+ if (!p)
+ return -ENOMEM;
+
+ ret = t4_read_cim_obq(adap, qid, (u32 *)p->data, 6 * CIM_OBQ_SIZE * 4);
+ if (ret < 0) {
+ seq_release_private(inode, file);
+ } else {
+ seq_tab_trim(p, ret / 4);
+ ret = 0;
+ }
+ return ret;
+}
+
+static const struct file_operations cim_obq_fops = {
+ .owner = THIS_MODULE,
+ .open = cim_obq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private
+};
+
/* Firmware Device Log dump. */
static const char * const devlog_level_strings[] = {
[FW_DEVLOG_LEVEL_EMERG] = "EMERG",
@@ -1388,14 +1428,31 @@ int t4_setup_debugfs(struct adapter *adap)
{ "ibq_sge0", &cim_ibq_fops, S_IRUSR, 3 },
{ "ibq_sge1", &cim_ibq_fops, S_IRUSR, 4 },
{ "ibq_ncsi", &cim_ibq_fops, S_IRUSR, 5 },
+ { "obq_ulp0", &cim_obq_fops, S_IRUSR, 0 },
+ { "obq_ulp1", &cim_obq_fops, S_IRUSR, 1 },
+ { "obq_ulp2", &cim_obq_fops, S_IRUSR, 2 },
+ { "obq_ulp3", &cim_obq_fops, S_IRUSR, 3 },
+ { "obq_sge", &cim_obq_fops, S_IRUSR, 4 },
+ { "obq_ncsi", &cim_obq_fops, S_IRUSR, 5 },
#if IS_ENABLED(CONFIG_IPV6)
{ "clip_tbl", &clip_tbl_debugfs_fops, S_IRUSR, 0 },
#endif
};
+ /* Debug FS nodes common to all T5 and later adapters.
+ */
+ static struct t4_debugfs_entry t5_debugfs_files[] = {
+ { "obq_sge_rx_q0", &cim_obq_fops, S_IRUSR, 6 },
+ { "obq_sge_rx_q1", &cim_obq_fops, S_IRUSR, 7 },
+ };
+
add_debugfs_files(adap,
t4_debugfs_files,
ARRAY_SIZE(t4_debugfs_files));
+ if (!is_t4(adap->params.chip))
+ add_debugfs_files(adap,
+ t5_debugfs_files,
+ ARRAY_SIZE(t5_debugfs_files));
i = t4_read_reg(adap, MA_TARGET_MEM_ENABLE_A);
if (i & EDRAM0_ENABLE_F) {
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index 4ea4a4a..a3d2f31 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -4568,6 +4568,49 @@ int t4_read_cim_ibq(struct adapter *adap, unsigned int qid, u32 *data, size_t n)
}
/**
+ * t4_read_cim_obq - read the contents of a CIM outbound queue
+ * @adap: the adapter
+ * @qid: the queue index
+ * @data: where to store the queue contents
+ * @n: capacity of @data in 32-bit words
+ *
+ * Reads the contents of the selected CIM queue starting at address 0 up
+ * to the capacity of @data. @n must be a multiple of 4. Returns < 0 on
+ * error and the number of 32-bit words actually read on success.
+ */
+int t4_read_cim_obq(struct adapter *adap, unsigned int qid, u32 *data, size_t n)
+{
+ int i, err;
+ unsigned int addr, v, nwords;
+ int cim_num_obq = is_t4(adap->params.chip) ?
+ CIM_NUM_OBQ : CIM_NUM_OBQ_T5;
+
+ if ((qid > (cim_num_obq - 1)) || (n & 3))
+ return -EINVAL;
+
+ t4_write_reg(adap, CIM_QUEUE_CONFIG_REF_A, OBQSELECT_F |
+ QUENUMSELECT_V(qid));
+ v = t4_read_reg(adap, CIM_QUEUE_CONFIG_CTRL_A);
+
+ addr = CIMQBASE_G(v) * 64; /* muliple of 256 -> muliple of 4 */
+ nwords = CIMQSIZE_G(v) * 64; /* same */
+ if (n > nwords)
+ n = nwords;
+
+ for (i = 0; i < n; i++, addr++) {
+ t4_write_reg(adap, CIM_OBQ_DBG_CFG_A, OBQDBGADDR_V(addr) |
+ OBQDBGEN_F);
+ err = t4_wait_op_done(adap, CIM_OBQ_DBG_CFG_A, OBQDBGBUSY_F, 0,
+ 2, 1);
+ if (err)
+ return err;
+ *data++ = t4_read_reg(adap, CIM_OBQ_DBG_DATA_A);
+ }
+ t4_write_reg(adap, CIM_OBQ_DBG_CFG_A, 0);
+ return i;
+}
+
+/**
* t4_cim_read - read a block from CIM internal address space
* @adap: the adapter
* @addr: the start address within the CIM address space
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.h b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.h
index 6581cd5..f9fb81e 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.h
@@ -61,6 +61,7 @@ enum {
CIM_NUM_OBQ_T5 = 8, /* # of CIM OBQs for T5 adapter */
CIMLA_SIZE = 2048, /* # of 32-bit words in CIM LA */
CIM_IBQ_SIZE = 128, /* # of 128-bit words in a CIM IBQ */
+ CIM_OBQ_SIZE = 128, /* # of 128-bit words in a CIM OBQ */
};
enum {
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h b/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
index 39e4b75..1b1560a 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
@@ -2553,7 +2553,23 @@
#define IBQDBGEN_V(x) ((x) << IBQDBGEN_S)
#define IBQDBGEN_F IBQDBGEN_V(1U)
+#define CIM_OBQ_DBG_CFG_A 0x7b64
+
+#define OBQDBGADDR_S 16
+#define OBQDBGADDR_M 0xfffU
+#define OBQDBGADDR_V(x) ((x) << OBQDBGADDR_S)
+#define OBQDBGADDR_G(x) (((x) >> OBQDBGADDR_S) & OBQDBGADDR_M)
+
+#define OBQDBGBUSY_S 1
+#define OBQDBGBUSY_V(x) ((x) << OBQDBGBUSY_S)
+#define OBQDBGBUSY_F OBQDBGBUSY_V(1U)
+
+#define OBQDBGEN_S 0
+#define OBQDBGEN_V(x) ((x) << OBQDBGEN_S)
+#define OBQDBGEN_F OBQDBGEN_V(1U)
+
#define CIM_IBQ_DBG_DATA_A 0x7b68
+#define CIM_OBQ_DBG_DATA_A 0x7b6c
#define UPDBGLARDEN_S 1
#define UPDBGLARDEN_V(x) ((x) << UPDBGLARDEN_S)
--
1.7.1
--
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