usb: mtu3: add tracepoints to help debug
This patch implements a few initial tracepoints for the mtu3 driver. More traces can be added as necessary in order to ease the task of debugging. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun
Greg Kroah-Hartman
parent
4aab6ad24a
commit
83374e035b
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@ -2,10 +2,17 @@
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ccflags-$(CONFIG_USB_MTU3_DEBUG) += -DDEBUG
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# define_trace.h needs to know how to find our header
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CFLAGS_mtu3_trace.o := -I$(src)
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obj-$(CONFIG_USB_MTU3) += mtu3.o
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mtu3-y := mtu3_plat.o
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ifneq ($(CONFIG_TRACING),)
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mtu3-y += mtu3_trace.o
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endif
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ifneq ($(filter y,$(CONFIG_USB_MTU3_HOST) $(CONFIG_USB_MTU3_DUAL_ROLE)),)
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mtu3-y += mtu3_host.o
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endif
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@ -17,6 +17,7 @@
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#include "mtu3.h"
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#include "mtu3_debug.h"
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#include "mtu3_trace.h"
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static int ep_fifo_alloc(struct mtu3_ep *mep, u32 seg_size)
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{
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@ -656,6 +657,8 @@ static irqreturn_t mtu3_link_isr(struct mtu3 *mtu)
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break;
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}
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dev_dbg(mtu->dev, "%s: %s\n", __func__, usb_speed_string(udev_speed));
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mtu3_dbg_trace(mtu->dev, "link speed %s",
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usb_speed_string(udev_speed));
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mtu->g.speed = udev_speed;
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mtu->g.ep0->maxpacket = maxpkt;
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@ -678,6 +681,7 @@ static irqreturn_t mtu3_u3_ltssm_isr(struct mtu3 *mtu)
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ltssm &= mtu3_readl(mbase, U3D_LTSSM_INTR_ENABLE);
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mtu3_writel(mbase, U3D_LTSSM_INTR, ltssm); /* W1C */
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dev_dbg(mtu->dev, "=== LTSSM[%x] ===\n", ltssm);
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trace_mtu3_u3_ltssm_isr(ltssm);
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if (ltssm & (HOT_RST_INTR | WARM_RST_INTR))
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mtu3_gadget_reset(mtu);
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@ -708,6 +712,7 @@ static irqreturn_t mtu3_u2_common_isr(struct mtu3 *mtu)
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u2comm &= mtu3_readl(mbase, U3D_COMMON_USB_INTR_ENABLE);
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mtu3_writel(mbase, U3D_COMMON_USB_INTR, u2comm); /* W1C */
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dev_dbg(mtu->dev, "=== U2COMM[%x] ===\n", u2comm);
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trace_mtu3_u2_common_isr(u2comm);
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if (u2comm & SUSPEND_INTR)
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mtu3_gadget_suspend(mtu);
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@ -39,4 +39,12 @@ static inline void ssusb_debugfs_remove_root(struct ssusb_mtk *ssusb) {}
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#endif /* CONFIG_DEBUG_FS */
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#if IS_ENABLED(CONFIG_TRACING)
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void mtu3_dbg_trace(struct device *dev, const char *fmt, ...);
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#else
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static inline void mtu3_dbg_trace(struct device *dev, const char *fmt, ...) {}
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#endif /* CONFIG_TRACING */
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#endif /* __MTU3_DEBUG_H__ */
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@ -141,6 +141,7 @@ static void ssusb_set_mailbox(struct otg_switch_mtk *otg_sx,
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struct mtu3 *mtu = ssusb->u3d;
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dev_dbg(ssusb->dev, "mailbox state(%d)\n", status);
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mtu3_dbg_trace(ssusb->dev, "mailbox %d", status);
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switch (status) {
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case MTU3_ID_GROUND:
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@ -8,6 +8,7 @@
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*/
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#include "mtu3.h"
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#include "mtu3_trace.h"
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void mtu3_req_complete(struct mtu3_ep *mep,
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struct usb_request *req, int status)
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@ -25,6 +26,8 @@ __acquires(mep->mtu->lock)
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mtu = mreq->mtu;
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mep->busy = 1;
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trace_mtu3_req_complete(mreq);
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spin_unlock(&mtu->lock);
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/* ep0 makes use of PIO, needn't unmap it */
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@ -201,6 +204,7 @@ error:
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spin_unlock_irqrestore(&mtu->lock, flags);
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dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep);
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trace_mtu3_gadget_ep_enable(mep);
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return ret;
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}
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@ -212,6 +216,7 @@ static int mtu3_gadget_ep_disable(struct usb_ep *ep)
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unsigned long flags;
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dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name);
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trace_mtu3_gadget_ep_disable(mep);
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if (!(mep->flags & MTU3_EP_ENABLED)) {
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dev_warn(mtu->dev, "%s is already disabled\n", mep->name);
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@ -242,13 +247,17 @@ struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
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mreq->request.dma = DMA_ADDR_INVALID;
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mreq->epnum = mep->epnum;
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mreq->mep = mep;
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trace_mtu3_alloc_request(mreq);
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return &mreq->request;
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}
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void mtu3_free_request(struct usb_ep *ep, struct usb_request *req)
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{
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kfree(to_mtu3_request(req));
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struct mtu3_request *mreq = to_mtu3_request(req);
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trace_mtu3_free_request(mreq);
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kfree(mreq);
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}
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static int mtu3_gadget_queue(struct usb_ep *ep,
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@ -316,6 +325,7 @@ static int mtu3_gadget_queue(struct usb_ep *ep,
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error:
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spin_unlock_irqrestore(&mtu->lock, flags);
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trace_mtu3_gadget_queue(mreq);
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return ret;
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}
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@ -333,6 +343,7 @@ static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req)
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return -EINVAL;
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dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req);
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trace_mtu3_gadget_dequeue(mreq);
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spin_lock_irqsave(&mtu->lock, flags);
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@ -403,6 +414,7 @@ static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value)
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done:
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spin_unlock_irqrestore(&mtu->lock, flags);
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trace_mtu3_gadget_ep_set_halt(mep);
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return ret;
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}
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@ -11,6 +11,8 @@
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#include <linux/usb/composite.h>
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#include "mtu3.h"
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#include "mtu3_debug.h"
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#include "mtu3_trace.h"
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/* ep0 is always mtu3->in_eps[0] */
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#define next_ep0_request(mtu) next_request((mtu)->ep0)
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@ -634,6 +636,7 @@ __acquires(mtu->lock)
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int handled = 0;
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ep0_read_setup(mtu, &setup);
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trace_mtu3_handle_setup(&setup);
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if ((setup.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
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handled = handle_standard_request(mtu, &setup);
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@ -710,6 +713,7 @@ irqreturn_t mtu3_ep0_isr(struct mtu3 *mtu)
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ret = IRQ_HANDLED;
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}
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dev_dbg(mtu->dev, "ep0_state: %s\n", decode_ep0_state(mtu));
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mtu3_dbg_trace(mtu->dev, "ep0_state %s", decode_ep0_state(mtu));
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switch (mtu->ep0_state) {
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case MU3D_EP0_STATE_TX:
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@ -22,6 +22,7 @@
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#include <linux/iopoll.h>
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#include "mtu3.h"
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#include "mtu3_trace.h"
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#define QMU_CHECKSUM_LEN 16
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@ -275,6 +276,7 @@ static int mtu3_prepare_tx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq)
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gpd->dw0_info |= cpu_to_le32(GPD_FLAGS_IOC | GPD_FLAGS_HWO);
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mreq->gpd = gpd;
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trace_mtu3_prepare_gpd(mep, gpd);
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return 0;
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}
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@ -307,6 +309,7 @@ static int mtu3_prepare_rx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq)
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gpd->dw0_info |= cpu_to_le32(GPD_FLAGS_IOC | GPD_FLAGS_HWO);
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mreq->gpd = gpd;
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trace_mtu3_prepare_gpd(mep, gpd);
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return 0;
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}
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@ -431,6 +434,7 @@ static void qmu_tx_zlp_error_handler(struct mtu3 *mtu, u8 epnum)
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}
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dev_dbg(mtu->dev, "%s send ZLP for req=%p\n", __func__, mreq);
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trace_mtu3_zlp_exp_gpd(mep, gpd_current);
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mtu3_clrbits(mbase, MU3D_EP_TXCR0(mep->epnum), TX_DMAREQEN);
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@ -486,6 +490,7 @@ static void qmu_done_tx(struct mtu3 *mtu, u8 epnum)
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request = &mreq->request;
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request->actual = GPD_DATA_LEN(mtu, le32_to_cpu(gpd->dw3_info));
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trace_mtu3_complete_gpd(mep, gpd);
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mtu3_req_complete(mep, request, 0);
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gpd = advance_deq_gpd(ring);
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@ -524,6 +529,7 @@ static void qmu_done_rx(struct mtu3 *mtu, u8 epnum)
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req = &mreq->request;
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req->actual = GPD_DATA_LEN(mtu, le32_to_cpu(gpd->dw3_info));
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trace_mtu3_complete_gpd(mep, gpd);
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mtu3_req_complete(mep, req, 0);
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gpd = advance_deq_gpd(ring);
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@ -601,6 +607,7 @@ irqreturn_t mtu3_qmu_isr(struct mtu3 *mtu)
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dev_dbg(mtu->dev, "=== QMUdone[tx=%x, rx=%x] QMUexp[%x] ===\n",
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(qmu_done_status & 0xFFFF), qmu_done_status >> 16,
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qmu_status);
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trace_mtu3_qmu_isr(qmu_done_status, qmu_status);
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if (qmu_done_status)
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qmu_done_isr(mtu, qmu_done_status);
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@ -0,0 +1,23 @@
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// SPDX-License-Identifier: GPL-2.0
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/**
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* mtu3_trace.c - trace support
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*
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* Copyright (C) 2019 MediaTek Inc.
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*
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* Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
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*/
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#define CREATE_TRACE_POINTS
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#include "mtu3_trace.h"
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void mtu3_dbg_trace(struct device *dev, const char *fmt, ...)
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{
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struct va_format vaf;
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va_list args;
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va_start(args, fmt);
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vaf.fmt = fmt;
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vaf.va = &args;
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trace_mtu3_log(dev, &vaf);
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va_end(args);
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}
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@ -0,0 +1,279 @@
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// SPDX-License-Identifier: GPL-2.0
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/**
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* mtu3_trace.h - trace support
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*
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* Copyright (C) 2019 MediaTek Inc.
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*
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* Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM mtu3
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#if !defined(__MTU3_TRACE_H__) || defined(TRACE_HEADER_MULTI_READ)
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#define __MTU3_TRACE_H__
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#include <linux/types.h>
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#include <linux/tracepoint.h>
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#include "mtu3.h"
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#define MTU3_MSG_MAX 256
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TRACE_EVENT(mtu3_log,
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TP_PROTO(struct device *dev, struct va_format *vaf),
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TP_ARGS(dev, vaf),
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TP_STRUCT__entry(
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__string(name, dev_name(dev))
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__dynamic_array(char, msg, MTU3_MSG_MAX)
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),
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TP_fast_assign(
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__assign_str(name, dev_name(dev));
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vsnprintf(__get_str(msg), MTU3_MSG_MAX, vaf->fmt, *vaf->va);
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),
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TP_printk("%s: %s", __get_str(name), __get_str(msg))
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);
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TRACE_EVENT(mtu3_u3_ltssm_isr,
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TP_PROTO(u32 intr),
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TP_ARGS(intr),
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TP_STRUCT__entry(
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__field(u32, intr)
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),
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TP_fast_assign(
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__entry->intr = intr;
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),
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TP_printk("(%08x) %s %s %s %s %s %s", __entry->intr,
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__entry->intr & HOT_RST_INTR ? "HOT_RST" : "",
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__entry->intr & WARM_RST_INTR ? "WARM_RST" : "",
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__entry->intr & ENTER_U3_INTR ? "ENT_U3" : "",
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__entry->intr & EXIT_U3_INTR ? "EXIT_U3" : "",
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__entry->intr & VBUS_RISE_INTR ? "VBUS_RISE" : "",
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__entry->intr & VBUS_FALL_INTR ? "VBUS_FALL" : ""
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)
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);
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TRACE_EVENT(mtu3_u2_common_isr,
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TP_PROTO(u32 intr),
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TP_ARGS(intr),
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TP_STRUCT__entry(
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__field(u32, intr)
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),
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TP_fast_assign(
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__entry->intr = intr;
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),
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TP_printk("(%08x) %s %s %s", __entry->intr,
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__entry->intr & SUSPEND_INTR ? "SUSPEND" : "",
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__entry->intr & RESUME_INTR ? "RESUME" : "",
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__entry->intr & RESET_INTR ? "RESET" : ""
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)
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);
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TRACE_EVENT(mtu3_qmu_isr,
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TP_PROTO(u32 done_intr, u32 exp_intr),
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TP_ARGS(done_intr, exp_intr),
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TP_STRUCT__entry(
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__field(u32, done_intr)
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__field(u32, exp_intr)
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),
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TP_fast_assign(
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__entry->done_intr = done_intr;
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__entry->exp_intr = exp_intr;
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),
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TP_printk("done (tx %04x, rx %04x), exp (%08x)",
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__entry->done_intr & 0xffff,
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__entry->done_intr >> 16,
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__entry->exp_intr
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)
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);
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DECLARE_EVENT_CLASS(mtu3_log_setup,
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TP_PROTO(struct usb_ctrlrequest *setup),
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TP_ARGS(setup),
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TP_STRUCT__entry(
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__field(__u8, bRequestType)
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__field(__u8, bRequest)
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__field(__u16, wValue)
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__field(__u16, wIndex)
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__field(__u16, wLength)
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),
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TP_fast_assign(
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__entry->bRequestType = setup->bRequestType;
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__entry->bRequest = setup->bRequest;
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__entry->wValue = le16_to_cpu(setup->wValue);
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__entry->wIndex = le16_to_cpu(setup->wIndex);
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__entry->wLength = le16_to_cpu(setup->wLength);
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),
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TP_printk("setup - %02x %02x %04x %04x %04x",
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__entry->bRequestType, __entry->bRequest,
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__entry->wValue, __entry->wIndex, __entry->wLength
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)
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);
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DEFINE_EVENT(mtu3_log_setup, mtu3_handle_setup,
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TP_PROTO(struct usb_ctrlrequest *setup),
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TP_ARGS(setup)
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);
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DECLARE_EVENT_CLASS(mtu3_log_request,
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TP_PROTO(struct mtu3_request *mreq),
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TP_ARGS(mreq),
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TP_STRUCT__entry(
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__string(name, mreq->mep->name)
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__field(struct mtu3_request *, mreq)
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__field(struct qmu_gpd *, gpd)
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__field(unsigned int, actual)
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__field(unsigned int, length)
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__field(int, status)
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__field(int, zero)
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__field(int, no_interrupt)
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),
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TP_fast_assign(
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__assign_str(name, mreq->mep->name);
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__entry->mreq = mreq;
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__entry->gpd = mreq->gpd;
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__entry->actual = mreq->request.actual;
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__entry->length = mreq->request.length;
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__entry->status = mreq->request.status;
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__entry->zero = mreq->request.zero;
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__entry->no_interrupt = mreq->request.no_interrupt;
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),
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TP_printk("%s: req %p gpd %p len %u/%u %s%s --> %d",
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__get_str(name), __entry->mreq, __entry->gpd,
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__entry->actual, __entry->length,
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__entry->zero ? "Z" : "z",
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__entry->no_interrupt ? "i" : "I",
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__entry->status
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)
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);
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DEFINE_EVENT(mtu3_log_request, mtu3_alloc_request,
|
||||
TP_PROTO(struct mtu3_request *req),
|
||||
TP_ARGS(req)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(mtu3_log_request, mtu3_free_request,
|
||||
TP_PROTO(struct mtu3_request *req),
|
||||
TP_ARGS(req)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(mtu3_log_request, mtu3_gadget_queue,
|
||||
TP_PROTO(struct mtu3_request *req),
|
||||
TP_ARGS(req)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(mtu3_log_request, mtu3_gadget_dequeue,
|
||||
TP_PROTO(struct mtu3_request *req),
|
||||
TP_ARGS(req)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(mtu3_log_request, mtu3_req_complete,
|
||||
TP_PROTO(struct mtu3_request *req),
|
||||
TP_ARGS(req)
|
||||
);
|
||||
|
||||
DECLARE_EVENT_CLASS(mtu3_log_gpd,
|
||||
TP_PROTO(struct mtu3_ep *mep, struct qmu_gpd *gpd),
|
||||
TP_ARGS(mep, gpd),
|
||||
TP_STRUCT__entry(
|
||||
__string(name, mep->name)
|
||||
__field(struct qmu_gpd *, gpd)
|
||||
__field(u32, dw0)
|
||||
__field(u32, dw1)
|
||||
__field(u32, dw2)
|
||||
__field(u32, dw3)
|
||||
),
|
||||
TP_fast_assign(
|
||||
__assign_str(name, mep->name);
|
||||
__entry->gpd = gpd;
|
||||
__entry->dw0 = le32_to_cpu(gpd->dw0_info);
|
||||
__entry->dw1 = le32_to_cpu(gpd->next_gpd);
|
||||
__entry->dw2 = le32_to_cpu(gpd->buffer);
|
||||
__entry->dw3 = le32_to_cpu(gpd->dw3_info);
|
||||
),
|
||||
TP_printk("%s: gpd %p - %08x %08x %08x %08x",
|
||||
__get_str(name), __entry->gpd,
|
||||
__entry->dw0, __entry->dw1,
|
||||
__entry->dw2, __entry->dw3
|
||||
)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(mtu3_log_gpd, mtu3_prepare_gpd,
|
||||
TP_PROTO(struct mtu3_ep *mep, struct qmu_gpd *gpd),
|
||||
TP_ARGS(mep, gpd)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(mtu3_log_gpd, mtu3_complete_gpd,
|
||||
TP_PROTO(struct mtu3_ep *mep, struct qmu_gpd *gpd),
|
||||
TP_ARGS(mep, gpd)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(mtu3_log_gpd, mtu3_zlp_exp_gpd,
|
||||
TP_PROTO(struct mtu3_ep *mep, struct qmu_gpd *gpd),
|
||||
TP_ARGS(mep, gpd)
|
||||
);
|
||||
|
||||
DECLARE_EVENT_CLASS(mtu3_log_ep,
|
||||
TP_PROTO(struct mtu3_ep *mep),
|
||||
TP_ARGS(mep),
|
||||
TP_STRUCT__entry(
|
||||
__string(name, mep->name)
|
||||
__field(unsigned int, type)
|
||||
__field(unsigned int, slot)
|
||||
__field(unsigned int, maxp)
|
||||
__field(unsigned int, mult)
|
||||
__field(unsigned int, maxburst)
|
||||
__field(unsigned int, flags)
|
||||
__field(unsigned int, direction)
|
||||
__field(struct mtu3_gpd_ring *, gpd_ring)
|
||||
),
|
||||
TP_fast_assign(
|
||||
__assign_str(name, mep->name);
|
||||
__entry->type = mep->type;
|
||||
__entry->slot = mep->slot;
|
||||
__entry->maxp = mep->ep.maxpacket;
|
||||
__entry->mult = mep->ep.mult;
|
||||
__entry->maxburst = mep->ep.maxburst;
|
||||
__entry->flags = mep->flags;
|
||||
__entry->direction = mep->is_in;
|
||||
__entry->gpd_ring = &mep->gpd_ring;
|
||||
),
|
||||
TP_printk("%s: type %d maxp %d slot %d mult %d burst %d ring %p/%pad flags %c:%c%c%c:%c",
|
||||
__get_str(name), __entry->type,
|
||||
__entry->maxp, __entry->slot,
|
||||
__entry->mult, __entry->maxburst,
|
||||
__entry->gpd_ring, &__entry->gpd_ring->dma,
|
||||
__entry->flags & MTU3_EP_ENABLED ? 'E' : 'e',
|
||||
__entry->flags & MTU3_EP_STALL ? 'S' : 's',
|
||||
__entry->flags & MTU3_EP_WEDGE ? 'W' : 'w',
|
||||
__entry->flags & MTU3_EP_BUSY ? 'B' : 'b',
|
||||
__entry->direction ? '<' : '>'
|
||||
)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(mtu3_log_ep, mtu3_gadget_ep_enable,
|
||||
TP_PROTO(struct mtu3_ep *mep),
|
||||
TP_ARGS(mep)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(mtu3_log_ep, mtu3_gadget_ep_disable,
|
||||
TP_PROTO(struct mtu3_ep *mep),
|
||||
TP_ARGS(mep)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(mtu3_log_ep, mtu3_gadget_ep_set_halt,
|
||||
TP_PROTO(struct mtu3_ep *mep),
|
||||
TP_ARGS(mep)
|
||||
);
|
||||
|
||||
#endif /* __MTU3_TRACE_H__ */
|
||||
|
||||
/* this part has to be here */
|
||||
|
||||
#undef TRACE_INCLUDE_PATH
|
||||
#define TRACE_INCLUDE_PATH .
|
||||
|
||||
#undef TRACE_INCLUDE_FILE
|
||||
#define TRACE_INCLUDE_FILE mtu3_trace
|
||||
|
||||
#include <trace/define_trace.h>
|
||||
Loading…
Reference in New Issue