diff options
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-tmc.c')
-rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc.c | 264 |
1 files changed, 4 insertions, 260 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c index 07e2809d832b..8d7f6d54c9b0 100644 --- a/drivers/hwtracing/coresight/coresight-tmc.c +++ b/drivers/hwtracing/coresight/coresight-tmc.c @@ -32,7 +32,7 @@ #include "coresight-priv.h" #include "coresight-tmc.h" -static void tmc_wait_for_tmcready(struct tmc_drvdata *drvdata) +void tmc_wait_for_tmcready(struct tmc_drvdata *drvdata) { /* Ensure formatter, unformatter and hardware fifo are empty */ if (coresight_timeout(drvdata->base, @@ -43,7 +43,7 @@ static void tmc_wait_for_tmcready(struct tmc_drvdata *drvdata) } } -static void tmc_flush_and_stop(struct tmc_drvdata *drvdata) +void tmc_flush_and_stop(struct tmc_drvdata *drvdata) { u32 ffcr; @@ -63,272 +63,16 @@ static void tmc_flush_and_stop(struct tmc_drvdata *drvdata) tmc_wait_for_tmcready(drvdata); } -static void tmc_enable_hw(struct tmc_drvdata *drvdata) +void tmc_enable_hw(struct tmc_drvdata *drvdata) { writel_relaxed(TMC_CTL_CAPT_EN, drvdata->base + TMC_CTL); } -static void tmc_disable_hw(struct tmc_drvdata *drvdata) +void tmc_disable_hw(struct tmc_drvdata *drvdata) { writel_relaxed(0x0, drvdata->base + TMC_CTL); } -static void tmc_etb_enable_hw(struct tmc_drvdata *drvdata) -{ - /* Zero out the memory to help with debug */ - memset(drvdata->buf, 0, drvdata->size); - - CS_UNLOCK(drvdata->base); - - /* Wait for TMCSReady bit to be set */ - tmc_wait_for_tmcready(drvdata); - - writel_relaxed(TMC_MODE_CIRCULAR_BUFFER, drvdata->base + TMC_MODE); - writel_relaxed(TMC_FFCR_EN_FMT | TMC_FFCR_EN_TI | - TMC_FFCR_FON_FLIN | TMC_FFCR_FON_TRIG_EVT | - TMC_FFCR_TRIGON_TRIGIN, - drvdata->base + TMC_FFCR); - - writel_relaxed(drvdata->trigger_cntr, drvdata->base + TMC_TRG); - tmc_enable_hw(drvdata); - - CS_LOCK(drvdata->base); -} - -static void tmc_etr_enable_hw(struct tmc_drvdata *drvdata) -{ - u32 axictl; - - /* Zero out the memory to help with debug */ - memset(drvdata->vaddr, 0, drvdata->size); - - CS_UNLOCK(drvdata->base); - - /* Wait for TMCSReady bit to be set */ - tmc_wait_for_tmcready(drvdata); - - writel_relaxed(drvdata->size / 4, drvdata->base + TMC_RSZ); - writel_relaxed(TMC_MODE_CIRCULAR_BUFFER, drvdata->base + TMC_MODE); - - axictl = readl_relaxed(drvdata->base + TMC_AXICTL); - axictl |= TMC_AXICTL_WR_BURST_16; - writel_relaxed(axictl, drvdata->base + TMC_AXICTL); - axictl &= ~TMC_AXICTL_SCT_GAT_MODE; - writel_relaxed(axictl, drvdata->base + TMC_AXICTL); - axictl = (axictl & - ~(TMC_AXICTL_PROT_CTL_B0 | TMC_AXICTL_PROT_CTL_B1)) | - TMC_AXICTL_PROT_CTL_B1; - writel_relaxed(axictl, drvdata->base + TMC_AXICTL); - - writel_relaxed(drvdata->paddr, drvdata->base + TMC_DBALO); - writel_relaxed(0x0, drvdata->base + TMC_DBAHI); - writel_relaxed(TMC_FFCR_EN_FMT | TMC_FFCR_EN_TI | - TMC_FFCR_FON_FLIN | TMC_FFCR_FON_TRIG_EVT | - TMC_FFCR_TRIGON_TRIGIN, - drvdata->base + TMC_FFCR); - writel_relaxed(drvdata->trigger_cntr, drvdata->base + TMC_TRG); - tmc_enable_hw(drvdata); - - CS_LOCK(drvdata->base); -} - -static void tmc_etf_enable_hw(struct tmc_drvdata *drvdata) -{ - CS_UNLOCK(drvdata->base); - - /* Wait for TMCSReady bit to be set */ - tmc_wait_for_tmcready(drvdata); - - writel_relaxed(TMC_MODE_HARDWARE_FIFO, drvdata->base + TMC_MODE); - writel_relaxed(TMC_FFCR_EN_FMT | TMC_FFCR_EN_TI, - drvdata->base + TMC_FFCR); - writel_relaxed(0x0, drvdata->base + TMC_BUFWM); - tmc_enable_hw(drvdata); - - CS_LOCK(drvdata->base); -} - -static int tmc_enable(struct tmc_drvdata *drvdata, enum tmc_mode mode) -{ - unsigned long flags; - - spin_lock_irqsave(&drvdata->spinlock, flags); - if (drvdata->reading) { - spin_unlock_irqrestore(&drvdata->spinlock, flags); - return -EBUSY; - } - - if (drvdata->config_type == TMC_CONFIG_TYPE_ETB) { - tmc_etb_enable_hw(drvdata); - } else if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { - tmc_etr_enable_hw(drvdata); - } else { - if (mode == TMC_MODE_CIRCULAR_BUFFER) - tmc_etb_enable_hw(drvdata); - else - tmc_etf_enable_hw(drvdata); - } - drvdata->enable = true; - spin_unlock_irqrestore(&drvdata->spinlock, flags); - - dev_info(drvdata->dev, "TMC enabled\n"); - return 0; -} - -static int tmc_enable_sink(struct coresight_device *csdev, u32 mode) -{ - struct tmc_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - - return tmc_enable(drvdata, TMC_MODE_CIRCULAR_BUFFER); -} - -static int tmc_enable_link(struct coresight_device *csdev, int inport, - int outport) -{ - struct tmc_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - - return tmc_enable(drvdata, TMC_MODE_HARDWARE_FIFO); -} - -static void tmc_etb_dump_hw(struct tmc_drvdata *drvdata) -{ - enum tmc_mem_intf_width memwidth; - u8 memwords; - char *bufp; - u32 read_data; - int i; - - memwidth = BMVAL(readl_relaxed(drvdata->base + CORESIGHT_DEVID), 8, 10); - if (memwidth == TMC_MEM_INTF_WIDTH_32BITS) - memwords = 1; - else if (memwidth == TMC_MEM_INTF_WIDTH_64BITS) - memwords = 2; - else if (memwidth == TMC_MEM_INTF_WIDTH_128BITS) - memwords = 4; - else - memwords = 8; - - bufp = drvdata->buf; - while (1) { - for (i = 0; i < memwords; i++) { - read_data = readl_relaxed(drvdata->base + TMC_RRD); - if (read_data == 0xFFFFFFFF) - return; - memcpy(bufp, &read_data, 4); - bufp += 4; - } - } -} - -static void tmc_etb_disable_hw(struct tmc_drvdata *drvdata) -{ - CS_UNLOCK(drvdata->base); - - tmc_flush_and_stop(drvdata); - tmc_etb_dump_hw(drvdata); - tmc_disable_hw(drvdata); - - CS_LOCK(drvdata->base); -} - -static void tmc_etr_dump_hw(struct tmc_drvdata *drvdata) -{ - u32 rwp, val; - - rwp = readl_relaxed(drvdata->base + TMC_RWP); - val = readl_relaxed(drvdata->base + TMC_STS); - - /* How much memory do we still have */ - if (val & BIT(0)) - drvdata->buf = drvdata->vaddr + rwp - drvdata->paddr; - else - drvdata->buf = drvdata->vaddr; -} - -static void tmc_etr_disable_hw(struct tmc_drvdata *drvdata) -{ - CS_UNLOCK(drvdata->base); - - tmc_flush_and_stop(drvdata); - tmc_etr_dump_hw(drvdata); - tmc_disable_hw(drvdata); - - CS_LOCK(drvdata->base); -} - -static void tmc_etf_disable_hw(struct tmc_drvdata *drvdata) -{ - CS_UNLOCK(drvdata->base); - - tmc_flush_and_stop(drvdata); - tmc_disable_hw(drvdata); - - CS_LOCK(drvdata->base); -} - -static void tmc_disable(struct tmc_drvdata *drvdata, enum tmc_mode mode) -{ - unsigned long flags; - - spin_lock_irqsave(&drvdata->spinlock, flags); - if (drvdata->reading) - goto out; - - if (drvdata->config_type == TMC_CONFIG_TYPE_ETB) { - tmc_etb_disable_hw(drvdata); - } else if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { - tmc_etr_disable_hw(drvdata); - } else { - if (mode == TMC_MODE_CIRCULAR_BUFFER) - tmc_etb_disable_hw(drvdata); - else - tmc_etf_disable_hw(drvdata); - } -out: - drvdata->enable = false; - spin_unlock_irqrestore(&drvdata->spinlock, flags); - - dev_info(drvdata->dev, "TMC disabled\n"); -} - -static void tmc_disable_sink(struct coresight_device *csdev) -{ - struct tmc_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - - tmc_disable(drvdata, TMC_MODE_CIRCULAR_BUFFER); -} - -static void tmc_disable_link(struct coresight_device *csdev, int inport, - int outport) -{ - struct tmc_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - - tmc_disable(drvdata, TMC_MODE_HARDWARE_FIFO); -} - -static const struct coresight_ops_sink tmc_sink_ops = { - .enable = tmc_enable_sink, - .disable = tmc_disable_sink, -}; - -static const struct coresight_ops_link tmc_link_ops = { - .enable = tmc_enable_link, - .disable = tmc_disable_link, -}; - -static const struct coresight_ops tmc_etb_cs_ops = { - .sink_ops = &tmc_sink_ops, -}; - -static const struct coresight_ops tmc_etr_cs_ops = { - .sink_ops = &tmc_sink_ops, -}; - -static const struct coresight_ops tmc_etf_cs_ops = { - .sink_ops = &tmc_sink_ops, - .link_ops = &tmc_link_ops, -}; - static int tmc_read_prepare(struct tmc_drvdata *drvdata) { int ret = 0; |