[PATCH 2/2] mt76: mt7915: add debugfs knobs for MCU utilization
Shayne Chen
shayne.chen at mediatek.com
Sat Aug 28 08:13:07 PDT 2021
Add debugfs knobs to read MCU utilization, which helps user know
firmware status more easily to narrow down CPU bottleneck issues.
Co-developed-by: Ryder Lee <ryder.lee at mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee at mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen at mediatek.com>
---
.../wireless/mediatek/mt76/mt7915/debugfs.c | 49 ++++++++++++++++++-
.../net/wireless/mediatek/mt76/mt7915/mcu.c | 5 +-
.../net/wireless/mediatek/mt76/mt7915/mcu.h | 2 +
.../net/wireless/mediatek/mt76/mt7915/mmio.c | 3 ++
.../wireless/mediatek/mt76/mt7915/mt7915.h | 1 +
.../net/wireless/mediatek/mt76/mt7915/regs.h | 17 +++++++
6 files changed, 73 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
index 3878635..5f2feb3 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
@@ -93,6 +93,12 @@ mt7915_fw_debug_wm_set(void *data, u64 val)
for (debug = DEBUG_TXCMD; debug <= DEBUG_RPT_RX; debug++)
mt7915_mcu_fw_dbg_ctrl(dev, debug, !!dev->fw_debug_wm);
+ /* WM CPU info record control */
+ mt76_clear(dev, MT_CPU_UTLZ_CTRL, BIT(0));
+ mt76_wr(dev, MT_DIC_CMD_REG_CMD, BIT(2) | BIT(13) | !dev->fw_debug_wm);
+ mt76_wr(dev, MT_MCU_WM_CIRQ_IRQ_MASK_CLR_ADDR, BIT(5));
+ mt76_wr(dev, MT_MCU_WM_CIRQ_IRQ_SOFT_ADDR, BIT(5));
+
return 0;
}
@@ -116,7 +122,11 @@ mt7915_fw_debug_wa_set(void *data, u64 val)
dev->fw_debug_wa = val ? MCU_FW_LOG_TO_HOST : 0;
- return mt7915_mcu_fw_log_2_host(dev, MCU_FW_LOG_WA, dev->fw_debug_wa);
+ mt7915_mcu_fw_log_2_host(dev, MCU_FW_LOG_WA, dev->fw_debug_wa);
+ mt7915_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(SET), MCU_WA_PARAM_PDMA_RX,
+ !!dev->fw_debug_wa, 0);
+
+ return 0;
}
static int
@@ -132,6 +142,39 @@ mt7915_fw_debug_wa_get(void *data, u64 *val)
DEFINE_DEBUGFS_ATTRIBUTE(fops_fw_debug_wa, mt7915_fw_debug_wa_get,
mt7915_fw_debug_wa_set, "%lld\n");
+static int
+mt7915_fw_utilization_wm_show(struct seq_file *file, void *data)
+{
+ struct mt7915_dev *dev = file->private;
+
+ if (dev->fw_debug_wm) {
+ seq_printf(file, "Busy: %u%% Peak busy: %u%%\n",
+ mt76_rr(dev, MT_CPU_UTLZ_BUSY_PCT),
+ mt76_rr(dev, MT_CPU_UTLZ_PEAK_BUSY_PCT));
+ seq_printf(file, "Idle count: %u Peak idle count: %u\n",
+ mt76_rr(dev, MT_CPU_UTLZ_IDLE_CNT),
+ mt76_rr(dev, MT_CPU_UTLZ_PEAK_IDLE_CNT));
+ }
+
+ return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(mt7915_fw_utilization_wm);
+
+static int
+mt7915_fw_utilization_wa_show(struct seq_file *file, void *data)
+{
+ struct mt7915_dev *dev = file->private;
+
+ if (dev->fw_debug_wa)
+ mt7915_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(QUERY),
+ MCU_WA_PARAM_CPU_UTILIZATION, 0, 0);
+
+ return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(mt7915_fw_utilization_wa);
+
static void
mt7915_ampdu_stat_read_phy(struct mt7915_phy *phy,
struct seq_file *file)
@@ -373,6 +416,10 @@ int mt7915_init_debugfs(struct mt7915_dev *dev)
debugfs_create_file("tx_stats", 0400, dir, dev, &mt7915_tx_stats_fops);
debugfs_create_file("fw_debug_wm", 0600, dir, dev, &fops_fw_debug_wm);
debugfs_create_file("fw_debug_wa", 0600, dir, dev, &fops_fw_debug_wa);
+ debugfs_create_file("fw_utilization_wm", 0400, dir, dev,
+ &mt7915_fw_utilization_wm_fops);
+ debugfs_create_file("fw_utilization_wa", 0400, dir, dev,
+ &mt7915_fw_utilization_wa_fops);
debugfs_create_file("implicit_txbf", 0600, dir, dev,
&fops_implicit_txbf);
debugfs_create_u32("dfs_hw_pattern", 0400, dir, &dev->hw_pattern);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index dad1858..cfa0550 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -416,8 +416,7 @@ exit:
return mt76_tx_queue_skb_raw(dev, mdev->q_mcu[qid], skb, 0);
}
-static void
-mt7915_mcu_wa_cmd(struct mt7915_dev *dev, int cmd, u32 a1, u32 a2, u32 a3)
+void mt7915_mcu_wa_cmd(struct mt7915_dev *dev, int cmd, u32 a1, u32 a2, u32 a3)
{
struct {
__le32 args[3];
@@ -429,7 +428,7 @@ mt7915_mcu_wa_cmd(struct mt7915_dev *dev, int cmd, u32 a1, u32 a2, u32 a3)
},
};
- mt76_mcu_send_msg(&dev->mt76, cmd, &req, sizeof(req), true);
+ mt76_mcu_send_msg(&dev->mt76, cmd, &req, sizeof(req), false);
}
static void
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
index 44e215d..9c10073 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
@@ -298,6 +298,8 @@ enum {
};
enum {
+ MCU_WA_PARAM_PDMA_RX = 0x04,
+ MCU_WA_PARAM_CPU_UTILIZATION = 0x0b,
MCU_WA_PARAM_RED = 0x0e,
};
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c b/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
index af712a9..bb55224 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
@@ -34,6 +34,9 @@ static u32 __mt7915_reg_addr(struct mt7915_dev *dev, u32 addr)
u32 mapped;
u32 size;
} fixed_map[] = {
+ { 0x00400000, 0x80000, 0x10000 }, /* WF_MCU_SYSRAM */
+ { 0x00410000, 0x90000, 0x10000 }, /* WF_MCU_SYSRAM (configure regs) */
+ { 0x40000000, 0x70000, 0x10000 }, /* WF_UMAC_SYSRAM */
{ 0x54000000, 0x02000, 0x1000 }, /* WFDMA PCIE0 MCU DMA0 */
{ 0x55000000, 0x03000, 0x1000 }, /* WFDMA PCIE0 MCU DMA1 */
{ 0x58000000, 0x06000, 0x1000 }, /* WFDMA PCIE1 MCU DMA0 (MEM_DMA) */
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index 75368ae..01c582e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -351,6 +351,7 @@ int mt7915_mcu_get_rx_rate(struct mt7915_phy *phy, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, struct rate_info *rate);
int mt7915_mcu_rdd_cmd(struct mt7915_dev *dev, enum mt7915_rdd_cmd cmd,
u8 index, u8 rx_sel, u8 val);
+void mt7915_mcu_wa_cmd(struct mt7915_dev *dev, int cmd, u32 a1, u32 a2, u32 a3);
int mt7915_mcu_fw_log_2_host(struct mt7915_dev *dev, u8 type, u8 ctrl);
int mt7915_mcu_fw_dbg_ctrl(struct mt7915_dev *dev, u32 module, u8 level);
void mt7915_mcu_rx_event(struct mt7915_dev *dev, struct sk_buff *skb);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/regs.h b/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
index f4101cc..fdf65d8 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
@@ -413,6 +413,18 @@
#define MT_HIF_REMAP_L2_BASE GENMASK(31, 12)
#define MT_HIF_REMAP_BASE_L2 0x00000
+#define MT_DIC_CMD_REG_BASE 0x41f000
+#define MT_DIC_CMD_REG(ofs) (MT_DIC_CMD_REG_BASE + (ofs))
+#define MT_DIC_CMD_REG_CMD MT_DIC_CMD_REG(0x10)
+
+#define MT_CPU_UTLZ_BASE 0x41f030
+#define MT_CPU_UTLZ(ofs) (MT_CPU_UTLZ_BASE + (ofs))
+#define MT_CPU_UTLZ_BUSY_PCT MT_CPU_UTLZ(0x00)
+#define MT_CPU_UTLZ_PEAK_BUSY_PCT MT_CPU_UTLZ(0x04)
+#define MT_CPU_UTLZ_IDLE_CNT MT_CPU_UTLZ(0x08)
+#define MT_CPU_UTLZ_PEAK_IDLE_CNT MT_CPU_UTLZ(0x0c)
+#define MT_CPU_UTLZ_CTRL MT_CPU_UTLZ(0x1c)
+
#define MT_SWDEF_BASE 0x41f200
#define MT_SWDEF(ofs) (MT_SWDEF_BASE + (ofs))
#define MT_SWDEF_MODE MT_SWDEF(0x3c)
@@ -458,4 +470,9 @@
#define MT_WF_PHY_RXTD12_IRPI_SW_CLR_ONLY BIT(18)
#define MT_WF_PHY_RXTD12_IRPI_SW_CLR BIT(29)
+#define MT_MCU_WM_CIRQ_BASE 0x89010000
+#define MT_MCU_WM_CIRQ(ofs) (MT_MCU_WM_CIRQ_BASE + (ofs))
+#define MT_MCU_WM_CIRQ_IRQ_MASK_CLR_ADDR MT_MCU_WM_CIRQ(0x80)
+#define MT_MCU_WM_CIRQ_IRQ_SOFT_ADDR MT_MCU_WM_CIRQ(0xc0)
+
#endif
--
2.25.1
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