[PATCH v4 2/2] mt76: mt7915: add debugfs knobs for MCU utilization
Lorenzo Bianconi
lorenzo at kernel.org
Thu Oct 21 00:57:05 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>
> ---
> v2: abbreviate utilization to util
> v3: rebase to staging tree
> v4: rebase to staging tree
> ---
> .../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 a829014..6823926 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
> @@ -100,6 +100,12 @@ 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_UTIL_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;
> }
>
> @@ -123,7 +129,11 @@ 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);
I guess we should not drop cmd result here (for both mt7915_mcu_fw_log_2_host
and mt7915_mcu_wa_cmd)
> +
> + return 0;
> }
>
> static int
> @@ -139,6 +149,39 @@ 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_util_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_UTIL_BUSY_PCT),
> + mt76_rr(dev, MT_CPU_UTIL_PEAK_BUSY_PCT));
> + seq_printf(file, "Idle count: %u Peak idle count: %u\n",
> + mt76_rr(dev, MT_CPU_UTIL_IDLE_CNT),
> + mt76_rr(dev, MT_CPU_UTIL_PEAK_IDLE_CNT));
> + }
> +
> + return 0;
> +}
> +
> +DEFINE_SHOW_ATTRIBUTE(mt7915_fw_util_wm);
> +
> +static int
> +mt7915_fw_util_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_UTIL, 0, 0);
> +
same here
Regards,
Lorenzo
> + return 0;
> +}
> +
> +DEFINE_SHOW_ATTRIBUTE(mt7915_fw_util_wa);
> +
> static void
> mt7915_ampdu_stat_read_phy(struct mt7915_phy *phy,
> struct seq_file *file)
> @@ -485,6 +528,10 @@ int mt7915_init_debugfs(struct mt7915_phy *phy)
> debugfs_create_file("tx_stats", 0400, dir, phy, &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_util_wm", 0400, dir, dev,
> + &mt7915_fw_util_wm_fops);
> + debugfs_create_file("fw_util_wa", 0400, dir, dev,
> + &mt7915_fw_util_wa_fops);
> debugfs_create_file("implicit_txbf", 0600, dir, dev,
> &fops_implicit_txbf);
> debugfs_create_file("txpower_sku", 0400, dir, phy,
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
> index 70193bb..56ed550 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 int
> -mt7915_mcu_wa_cmd(struct mt7915_dev *dev, int cmd, u32 a1, u32 a2, u32 a3)
> +int 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)
> },
> };
>
> - return mt76_mcu_send_msg(&dev->mt76, cmd, &req, sizeof(req), true);
> + return 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 855fbee..f35fa97 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
> @@ -310,6 +310,8 @@ enum {
> };
>
> enum {
> + MCU_WA_PARAM_PDMA_RX = 0x04,
> + MCU_WA_PARAM_CPU_UTIL = 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 7bbb38e..1f6ba30 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 070950b..b318b3d 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
> @@ -450,6 +450,7 @@ 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);
> +int 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 99574ed..ff71f56 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
> @@ -528,6 +528,18 @@
> #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_UTIL_BASE 0x41f030
> +#define MT_CPU_UTIL(ofs) (MT_CPU_UTIL_BASE + (ofs))
> +#define MT_CPU_UTIL_BUSY_PCT MT_CPU_UTIL(0x00)
> +#define MT_CPU_UTIL_PEAK_BUSY_PCT MT_CPU_UTIL(0x04)
> +#define MT_CPU_UTIL_IDLE_CNT MT_CPU_UTIL(0x08)
> +#define MT_CPU_UTIL_PEAK_IDLE_CNT MT_CPU_UTIL(0x0c)
> +#define MT_CPU_UTIL_CTRL MT_CPU_UTIL(0x1c)
> +
> #define MT_SWDEF_BASE 0x41f200
> #define MT_SWDEF(ofs) (MT_SWDEF_BASE + (ofs))
> #define MT_SWDEF_MODE MT_SWDEF(0x3c)
> @@ -591,4 +603,9 @@
> #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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