coresight: Convert claim/disclaim operations to use access wrappers

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

Link: https://lore.kernel.org/r/20210110224850.1880240-7-suzuki.poulose@arm.com
Cc: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210201181351.1475223-9-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 40 insertions, 26 deletions

diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c
index 74985068f325..0062c8935653 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);