[PATCH v3 10/26] coresight: Convert claim/disclaim operations to use access wrappers

Suzuki K Poulose
2020-10-28T22:10:29Z

Convert the generic CLAIM tag management APIs to use the
device access layer abstraction.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
drivers/hwtracing/coresight/coresight-catu.c | 6 +-
drivers/hwtracing/coresight/coresight-core.c | 66 +++++++++++--------
.../hwtracing/coresight/coresight-cti-core.c | 17 +++--
drivers/hwtracing/coresight/coresight-etb10.c | 4 +-
.../coresight/coresight-etm3x-core.c | 8 ++-
.../coresight/coresight-etm4x-core.c | 4 +-
.../hwtracing/coresight/coresight-funnel.c | 6 +-
.../coresight/coresight-replicator.c | 16 +++--
.../hwtracing/coresight/coresight-tmc-etf.c | 10 +--
.../hwtracing/coresight/coresight-tmc-etr.c | 4 +-
include/linux/coresight.h | 16 ++---
11 files changed, 95 insertions(+), 62 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c
index 34c74b05c542..438063523463 100644
--- a/drivers/hwtracing/coresight/coresight-catu.c
+++ b/drivers/hwtracing/coresight/coresight-catu.c
@@ -412,6 +412,7 @@ static int catu_enable_hw(struct catu_drvdata *drvdata, void *data)
u32 control, mode;
struct etr_buf *etr_buf = data;
struct device *dev = &drvdata->csdev->dev;
+ struct coresight_device *csdev = drvdata->csdev;

if (catu_wait_for_ready(drvdata))
dev_warn(dev, "Timeout while waiting for READY\n");
@@ -422,7 +423,7 @@ static int catu_enable_hw(struct catu_drvdata *drvdata, void *data)
return -EBUSY;
}

- rc = coresight_claim_device_unlocked(drvdata->base);
+ rc = coresight_claim_device_unlocked(csdev);
if (rc)
return rc;

@@ -466,9 +467,10 @@ static int catu_disable_hw(struct catu_drvdata *drvdata)
{
int rc = 0;
struct device *dev = &drvdata->csdev->dev;
+ struct coresight_device *csdev = drvdata->csdev;

catu_write_control(drvdata, 0);
- coresight_disclaim_device_unlocked(drvdata->base);
+ coresight_disclaim_device_unlocked(csdev);
if (catu_wait_for_ready(drvdata)) {
dev_info(dev, "Timeout while waiting for READY\n");
rc = -EAGAIN;
diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c
index 42ba989a6b5e..4e7dd5941046 100644
--- a/drivers/hwtracing/coresight/coresight-core.c
+++ b/drivers/hwtracing/coresight/coresight-core.c
@@ -145,30 +145,32 @@ static int coresight_find_link_outport(struct coresight_device *csdev,
return -ENODEV;
}

-static inline u32 coresight_read_claim_tags(void __iomem *base)
+static inline u32 coresight_read_claim_tags(struct coresight_device *csdev)
{
- return readl_relaxed(base + CORESIGHT_CLAIMCLR);
+ return csdev_access_relaxed_read32(&csdev->access, CORESIGHT_CLAIMCLR);
}

-static inline bool coresight_is_claimed_self_hosted(void __iomem *base)
+static inline bool coresight_is_claimed_self_hosted(struct coresight_device *csdev)
{
- return coresight_read_claim_tags(base) == CORESIGHT_CLAIM_SELF_HOSTED;
+ return coresight_read_claim_tags(csdev) == CORESIGHT_CLAIM_SELF_HOSTED;
}

-static inline bool coresight_is_claimed_any(void __iomem *base)
+static inline bool coresight_is_claimed_any(struct coresight_device *csdev)
{
- return coresight_read_claim_tags(base) != 0;
+ return coresight_read_claim_tags(csdev) != 0;
}

-static inline void coresight_set_claim_tags(void __iomem *base)
+static inline void coresight_set_claim_tags(struct coresight_device *csdev)
{
- writel_relaxed(CORESIGHT_CLAIM_SELF_HOSTED, base + CORESIGHT_CLAIMSET);
+ csdev_access_relaxed_write32(&csdev->access, CORESIGHT_CLAIM_SELF_HOSTED,
+ CORESIGHT_CLAIMSET);
isb();
}

-static inline void coresight_clear_claim_tags(void __iomem *base)
+static inline void coresight_clear_claim_tags(struct coresight_device *csdev)
{
- writel_relaxed(CORESIGHT_CLAIM_SELF_HOSTED, base + CORESIGHT_CLAIMCLR);
+ csdev_access_relaxed_write32(&csdev->access, CORESIGHT_CLAIM_SELF_HOSTED,
+ CORESIGHT_CLAIMCLR);
isb();
}

@@ -182,27 +184,33 @@ static inline void coresight_clear_claim_tags(void __iomem *base)
* Called with CS_UNLOCKed for the component.
* Returns : 0 on success
*/
-int coresight_claim_device_unlocked(void __iomem *base)
+int coresight_claim_device_unlocked(struct coresight_device *csdev)
{
- if (coresight_is_claimed_any(base))
+ if (WARN_ON(!csdev))
+ return -EINVAL;
+
+ if (coresight_is_claimed_any(csdev))
return -EBUSY;

- coresight_set_claim_tags(base);
- if (coresight_is_claimed_self_hosted(base))
+ coresight_set_claim_tags(csdev);
+ if (coresight_is_claimed_self_hosted(csdev))
return 0;
/* There was a race setting the tags, clean up and fail */
- coresight_clear_claim_tags(base);
+ coresight_clear_claim_tags(csdev);
return -EBUSY;
}
EXPORT_SYMBOL_GPL(coresight_claim_device_unlocked);

-int coresight_claim_device(void __iomem *base)
+int coresight_claim_device(struct coresight_device *csdev)
{
int rc;

- CS_UNLOCK(base);
- rc = coresight_claim_device_unlocked(base);
- CS_LOCK(base);
+ if (WARN_ON(!csdev))
+ return -EINVAL;
+
+ CS_UNLOCK(csdev->access.base);
+ rc = coresight_claim_device_unlocked(csdev);
+ CS_LOCK(csdev->access.base);

return rc;
}
@@ -212,11 +220,14 @@ EXPORT_SYMBOL_GPL(coresight_claim_device);
* coresight_disclaim_device_unlocked : Clear the claim tags for the device.
* Called with CS_UNLOCKed for the component.
*/
-void coresight_disclaim_device_unlocked(void __iomem *base)
+void coresight_disclaim_device_unlocked(struct coresight_device *csdev)
{

- if (coresight_is_claimed_self_hosted(base))
- coresight_clear_claim_tags(base);
+ if (WARN_ON(!csdev))
+ return;
+
+ if (coresight_is_claimed_self_hosted(csdev))
+ coresight_clear_claim_tags(csdev);
else
/*
* The external agent may have not honoured our claim
@@ -227,11 +238,14 @@ void coresight_disclaim_device_unlocked(void __iomem *base)
}
EXPORT_SYMBOL_GPL(coresight_disclaim_device_unlocked);

-void coresight_disclaim_device(void __iomem *base)
+void coresight_disclaim_device(struct coresight_device *csdev)
{
- CS_UNLOCK(base);
- coresight_disclaim_device_unlocked(base);
- CS_LOCK(base);
+ if (WARN_ON(!csdev))
+ return;
+
+ CS_UNLOCK(csdev->access.base);
+ coresight_disclaim_device_unlocked(csdev);
+ CS_LOCK(csdev->access.base);
}
EXPORT_SYMBOL_GPL(coresight_disclaim_device);

diff --git a/drivers/hwtracing/coresight/coresight-cti-core.c b/drivers/hwtracing/coresight/coresight-cti-core.c
index 3bb0de97d66e..5651d7f61a70 100644
--- a/drivers/hwtracing/coresight/coresight-cti-core.c
+++ b/drivers/hwtracing/coresight/coresight-cti-core.c
@@ -102,7 +102,7 @@ static int cti_enable_hw(struct cti_drvdata *drvdata)
goto cti_state_unchanged;

/* claim the device */
- rc = coresight_claim_device(drvdata->base);
+ rc = coresight_claim_device(drvdata->csdev);
if (rc)
goto cti_err_not_enabled;

@@ -136,7 +136,7 @@ static void cti_cpuhp_enable_hw(struct cti_drvdata *drvdata)
goto cti_hp_not_enabled;

/* try to claim the device */
- if (coresight_claim_device(drvdata->base))
+ if (coresight_claim_device(drvdata->csdev))
goto cti_hp_not_enabled;

cti_write_all_hw_regs(drvdata);
@@ -154,6 +154,7 @@ static int cti_disable_hw(struct cti_drvdata *drvdata)
{
struct cti_config *config = &drvdata->config;
struct device *dev = &drvdata->csdev->dev;
+ struct coresight_device *csdev = drvdata->csdev;

spin_lock(&drvdata->spinlock);

@@ -171,7 +172,7 @@ static int cti_disable_hw(struct cti_drvdata *drvdata)
writel_relaxed(0, drvdata->base + CTICONTROL);
config->hw_enabled = false;

- coresight_disclaim_device_unlocked(drvdata->base);
+ coresight_disclaim_device_unlocked(csdev);
CS_LOCK(drvdata->base);
spin_unlock(&drvdata->spinlock);
pm_runtime_put(dev);
@@ -655,6 +656,7 @@ static int cti_cpu_pm_notify(struct notifier_block *nb, unsigned long cmd,
void *v)
{
struct cti_drvdata *drvdata;
+ struct coresight_device *csdev;
unsigned int cpu = smp_processor_id();
int notify_res = NOTIFY_OK;

@@ -662,6 +664,7 @@ static int cti_cpu_pm_notify(struct notifier_block *nb, unsigned long cmd,
return NOTIFY_OK;

drvdata = cti_cpu_drvdata[cpu];
+ csdev = drvdata->csdev;

if (WARN_ON_ONCE(drvdata->ctidev.cpu != cpu))
return NOTIFY_BAD;
@@ -673,13 +676,13 @@ static int cti_cpu_pm_notify(struct notifier_block *nb, unsigned long cmd,
/* CTI regs all static - we have a copy & nothing to save */
drvdata->config.hw_powered = false;
if (drvdata->config.hw_enabled)
- coresight_disclaim_device(drvdata->base);
+ coresight_disclaim_device(csdev);
break;

case CPU_PM_ENTER_FAILED:
drvdata->config.hw_powered = true;
if (drvdata->config.hw_enabled) {
- if (coresight_claim_device(drvdata->base))
+ if (coresight_claim_device(csdev))
drvdata->config.hw_enabled = false;
}
break;
@@ -692,7 +695,7 @@ static int cti_cpu_pm_notify(struct notifier_block *nb, unsigned long cmd,
/* check enable reference count to enable HW */
if (atomic_read(&drvdata->config.enable_req_count)) {
/* check we can claim the device as we re-power */
- if (coresight_claim_device(drvdata->base))
+ if (coresight_claim_device(csdev))
goto cti_notify_exit;

drvdata->config.hw_enabled = true;
@@ -736,7 +739,7 @@ static int cti_dying_cpu(unsigned int cpu)
spin_lock(&drvdata->spinlock);
drvdata->config.hw_powered = false;
if (drvdata->config.hw_enabled)
- coresight_disclaim_device(drvdata->base);
+ coresight_disclaim_device(drvdata->csdev);
spin_unlock(&drvdata->spinlock);
return 0;
}
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index f994a22876d9..0a416883e012 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -132,7 +132,7 @@ static void __etb_enable_hw(struct etb_drvdata *drvdata)

static int etb_enable_hw(struct etb_drvdata *drvdata)
{
- int rc = coresight_claim_device(drvdata->base);
+ int rc = coresight_claim_device(drvdata->csdev);

if (rc)
return rc;
@@ -344,7 +344,7 @@ static void etb_disable_hw(struct etb_drvdata *drvdata)
{
__etb_disable_hw(drvdata);
etb_dump_hw(drvdata);
- coresight_disclaim_device(drvdata->base);
+ coresight_disclaim_device(drvdata->csdev);
}

static int etb_disable(struct coresight_device *csdev)
diff --git a/drivers/hwtracing/coresight/coresight-etm3x-core.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c
index 36c5b0ae1b43..70d6d809cb47 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c
@@ -358,10 +358,11 @@ static int etm_enable_hw(struct etm_drvdata *drvdata)
int i, rc;
u32 etmcr;
struct etm_config *config = &drvdata->config;
+ struct coresight_device *csdev = drvdata->csdev;

CS_UNLOCK(drvdata->base);

- rc = coresight_claim_device_unlocked(drvdata->base);
+ rc = coresight_claim_device_unlocked(csdev);
if (rc)
goto done;

@@ -566,6 +567,7 @@ static void etm_disable_hw(void *info)
int i;
struct etm_drvdata *drvdata = info;
struct etm_config *config = &drvdata->config;
+ struct coresight_device *csdev = drvdata->csdev;

CS_UNLOCK(drvdata->base);
etm_set_prog(drvdata);
@@ -577,7 +579,7 @@ static void etm_disable_hw(void *info)
config->cntr_val[i] = etm_readl(drvdata, ETMCNTVRn(i));

etm_set_pwrdwn(drvdata);
- coresight_disclaim_device_unlocked(drvdata->base);
+ coresight_disclaim_device_unlocked(csdev);

CS_LOCK(drvdata->base);

@@ -602,7 +604,7 @@ static void etm_disable_perf(struct coresight_device *csdev)
* power down the tracer.
*/
etm_set_pwrdwn(drvdata);
- coresight_disclaim_device_unlocked(drvdata->base);
+ coresight_disclaim_device_unlocked(csdev);

CS_LOCK(drvdata->base);
}
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index 2744aadaa5ec..4f1bcf98fefe 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -115,7 +115,7 @@ static int etm4_enable_hw(struct etmv4_drvdata *drvdata)

etm4_os_unlock(drvdata);

- rc = coresight_claim_device_unlocked(drvdata->base);
+ rc = coresight_claim_device_unlocked(csdev);
if (rc)
goto done;

@@ -523,7 +523,7 @@ static void etm4_disable_hw(void *info)
readl_relaxed(drvdata->base + TRCCNTVRn(i));
}

- coresight_disclaim_device_unlocked(drvdata->base);
+ coresight_disclaim_device_unlocked(csdev);

CS_LOCK(drvdata->base);

diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
index f77466aea26f..2f8675c527bf 100644
--- a/drivers/hwtracing/coresight/coresight-funnel.c
+++ b/drivers/hwtracing/coresight/coresight-funnel.c
@@ -52,13 +52,14 @@ static int dynamic_funnel_enable_hw(struct funnel_drvdata *drvdata, int port)
{
u32 functl;
int rc = 0;
+ struct coresight_device *csdev = drvdata->csdev;

CS_UNLOCK(drvdata->base);

functl = readl_relaxed(drvdata->base + FUNNEL_FUNCTL);
/* Claim the device only when we enable the first slave */
if (!(functl & FUNNEL_ENSx_MASK)) {
- rc = coresight_claim_device_unlocked(drvdata->base);
+ rc = coresight_claim_device_unlocked(csdev);
if (rc)
goto done;
}
@@ -101,6 +102,7 @@ static void dynamic_funnel_disable_hw(struct funnel_drvdata *drvdata,
int inport)
{
u32 functl;
+ struct coresight_device *csdev = drvdata->csdev;

CS_UNLOCK(drvdata->base);

@@ -110,7 +112,7 @@ static void dynamic_funnel_disable_hw(struct funnel_drvdata *drvdata,

/* Disclaim the device if none of the slaves are now active */
if (!(functl & FUNNEL_ENSx_MASK))
- coresight_disclaim_device_unlocked(drvdata->base);
+ coresight_disclaim_device_unlocked(csdev);

CS_LOCK(drvdata->base);
}
diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
index fcf25740116c..e35d79e74e30 100644
--- a/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-replicator.c
@@ -45,12 +45,18 @@ struct replicator_drvdata {

static void dynamic_replicator_reset(struct replicator_drvdata *drvdata)
{
+ struct coresight_device *csdev = drvdata->csdev;
CS_UNLOCK(drvdata->base);

- if (!coresight_claim_device_unlocked(drvdata->base)) {
+ if (WARN_ON(!csdev))
+ return;
+
+ CS_UNLOCK(drvdata->base);
+
+ if (!coresight_claim_device_unlocked(csdev)) {
writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER0);
writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER1);
- coresight_disclaim_device_unlocked(drvdata->base);
+ coresight_disclaim_device_unlocked(csdev);
}

CS_LOCK(drvdata->base);
@@ -70,6 +76,7 @@ static int dynamic_replicator_enable(struct replicator_drvdata *drvdata,
{
int rc = 0;
u32 id0val, id1val;
+ struct coresight_device *csdev = drvdata->csdev;

CS_UNLOCK(drvdata->base);

@@ -84,7 +91,7 @@ static int dynamic_replicator_enable(struct replicator_drvdata *drvdata,
id0val = id1val = 0xff;

if (id0val == 0xff && id1val == 0xff)
- rc = coresight_claim_device_unlocked(drvdata->base);
+ rc = coresight_claim_device_unlocked(csdev);

if (!rc) {
switch (outport) {
@@ -140,6 +147,7 @@ static void dynamic_replicator_disable(struct replicator_drvdata *drvdata,
int inport, int outport)
{
u32 reg;
+ struct coresight_device *csdev = drvdata->csdev;

switch (outport) {
case 0:
@@ -160,7 +168,7 @@ static void dynamic_replicator_disable(struct replicator_drvdata *drvdata,

if ((readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0) == 0xff) &&
(readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1) == 0xff))
- coresight_disclaim_device_unlocked(drvdata->base);
+ coresight_disclaim_device_unlocked(csdev);
CS_LOCK(drvdata->base);
}

diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c
index 44402d413ebb..3a5605eda68f 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etf.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c
@@ -37,7 +37,7 @@ static void __tmc_etb_enable_hw(struct tmc_drvdata *drvdata)

static int tmc_etb_enable_hw(struct tmc_drvdata *drvdata)
{
- int rc = coresight_claim_device(drvdata->base);
+ int rc = coresight_claim_device(drvdata->csdev);

if (rc)
return rc;
@@ -88,7 +88,7 @@ static void __tmc_etb_disable_hw(struct tmc_drvdata *drvdata)
static void tmc_etb_disable_hw(struct tmc_drvdata *drvdata)
{
__tmc_etb_disable_hw(drvdata);
- coresight_disclaim_device(drvdata->base);
+ coresight_disclaim_device(drvdata->csdev);
}

static void __tmc_etf_enable_hw(struct tmc_drvdata *drvdata)
@@ -109,7 +109,7 @@ static void __tmc_etf_enable_hw(struct tmc_drvdata *drvdata)

static int tmc_etf_enable_hw(struct tmc_drvdata *drvdata)
{
- int rc = coresight_claim_device(drvdata->base);
+ int rc = coresight_claim_device(drvdata->csdev);

if (rc)
return rc;
@@ -120,11 +120,13 @@ static int tmc_etf_enable_hw(struct tmc_drvdata *drvdata)

static void tmc_etf_disable_hw(struct tmc_drvdata *drvdata)
{
+ struct coresight_device *csdev = drvdata->csdev;
+
CS_UNLOCK(drvdata->base);

tmc_flush_and_stop(drvdata);
tmc_disable_hw(drvdata);
- coresight_disclaim_device_unlocked(drvdata->base);
+ coresight_disclaim_device_unlocked(csdev);
CS_LOCK(drvdata->base);
}

diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c
index 714f9e867e5f..a8b1c49761c7 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etr.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c
@@ -1038,7 +1038,7 @@ static int tmc_etr_enable_hw(struct tmc_drvdata *drvdata,
rc = tmc_etr_enable_catu(drvdata, etr_buf);
if (rc)
return rc;
- rc = coresight_claim_device(drvdata->base);
+ rc = coresight_claim_device(drvdata->csdev);
if (!rc) {
drvdata->etr_buf = etr_buf;
__tmc_etr_enable_hw(drvdata);
@@ -1132,7 +1132,7 @@ void tmc_etr_disable_hw(struct tmc_drvdata *drvdata)
__tmc_etr_disable_hw(drvdata);
/* Disable CATU device if this ETR is connected to one */
tmc_etr_disable_catu(drvdata);
- coresight_disclaim_device(drvdata->base);
+ coresight_disclaim_device(drvdata->csdev);
/* Reset the ETR buf used by hardware */
drvdata->etr_buf = NULL;
}
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index cefc8fe239e6..c2d0a2aea45f 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -474,11 +474,11 @@ extern int coresight_timeout(struct csdev_access *csa,
int position,
int value);

-extern int coresight_claim_device(void __iomem *base);
-extern int coresight_claim_device_unlocked(void __iomem *base);
+extern int coresight_claim_device(struct coresight_device *csdev);
+extern int coresight_claim_device_unlocked(struct coresight_device *csdev);

-extern void coresight_disclaim_device(void __iomem *base);
-extern void coresight_disclaim_device_unlocked(void __iomem *base);
+extern void coresight_disclaim_device(struct coresight_device *csdev);
+extern void coresight_disclaim_device_unlocked(struct coresight_device *csdev);
extern char *coresight_alloc_device_name(struct coresight_dev_list *devs,
struct device *dev);

@@ -513,18 +513,18 @@ static inline int coresight_timeout(struct csdev_access *csa,
return 1;
}

-static inline int coresight_claim_device_unlocked(void __iomem *base)
+static inline int coresight_claim_device_unlocked(struct coresight_device *csdev)
{
return -EINVAL;
}

-static inline int coresight_claim_device(void __iomem *base)
+static inline int coresight_claim_device(struct coresight_device *csdev)
{
return -EINVAL;
}

-static inline void coresight_disclaim_device(void __iomem *base) {}
-static inline void coresight_disclaim_device_unlocked(void __iomem *base) {}
+static inline void coresight_disclaim_device(struct coresight_device *csdev) {}
+static inline void coresight_disclaim_device_unlocked(struct coresight_device *csdev) {}

static inline bool coresight_loses_context_with_cpu(struct device *dev)
{
--
2.24.1