From: Anshuman Khandual <anshuman.khandual@arm.com>
Date: Thu, 14 Mar 2024 05:58:35 +0000 (+0530)
Subject: coresight: tmc: Extract device properties from AMBA pid based table lookup
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=3ab210297c31b8fef1cfb2aa3d85b227b9ace09b;p=linux.git

coresight: tmc: Extract device properties from AMBA pid based table lookup

This extracts device properties from AMBA pid based table lookup. But first
this modifies tmc_etr_setup_caps() to accept csdev access.

Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: James Clark <james.clark@arm.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20240314055843.2625883-4-anshuman.khandual@arm.com
---

diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwtracing/coresight/coresight-tmc-core.c
index 72005b0c633e5..1a5ca65d8677e 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-core.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-core.c
@@ -370,16 +370,23 @@ static inline bool tmc_etr_has_non_secure_access(struct tmc_drvdata *drvdata)
 	return (auth & TMC_AUTH_NSID_MASK) == 0x3;
 }
 
+static const struct amba_id tmc_ids[];
+
 /* Detect and initialise the capabilities of a TMC ETR */
-static int tmc_etr_setup_caps(struct device *parent, u32 devid, void *dev_caps)
+static int tmc_etr_setup_caps(struct device *parent, u32 devid,
+			      struct csdev_access *access)
 {
 	int rc;
-	u32 dma_mask = 0;
+	u32 tmc_pid, dma_mask = 0;
 	struct tmc_drvdata *drvdata = dev_get_drvdata(parent);
+	void *dev_caps;
 
 	if (!tmc_etr_has_non_secure_access(drvdata))
 		return -EACCES;
 
+	tmc_pid = coresight_get_pid(access);
+	dev_caps = coresight_get_uci_data_from_amba(tmc_ids, tmc_pid);
+
 	/* Set the unadvertised capabilities */
 	tmc_etr_init_caps(drvdata, (u32)(unsigned long)dev_caps);
 
@@ -497,8 +504,7 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
 		desc.type = CORESIGHT_DEV_TYPE_SINK;
 		desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_SYSMEM;
 		desc.ops = &tmc_etr_cs_ops;
-		ret = tmc_etr_setup_caps(dev, devid,
-					 coresight_get_uci_data(id));
+		ret = tmc_etr_setup_caps(dev, devid, &desc.access);
 		if (ret)
 			goto out;
 		idr_init(&drvdata->idr);