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Date:   Wed, 25 Oct 2023 09:35:45 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH 2/3] remoteproc: qcom: pas: make region assign more generic

The current memory region assign only supports a single
memory region.

But new platforms introduces more regions to make the
memory requirements more flexible for various use cases.
Those new platforms also shares the memory region between the
DSP and HLOS.

To handle this, make the region assign more generic in order
to support more than a single memory region and also permit
setting the regions permissions as shared.

Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
 drivers/remoteproc/qcom_q6v5_pas.c | 102 ++++++++++++++++++++++++-------------
 1 file changed, 66 insertions(+), 36 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
index 913a5d2068e8..4829fd26e17d 100644
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -33,6 +33,8 @@
 
 #define ADSP_DECRYPT_SHUTDOWN_DELAY_MS	100
 
+#define MAX_ASSIGN_COUNT 2
+
 struct adsp_data {
 	int crash_reason_smem;
 	const char *firmware_name;
@@ -51,6 +53,9 @@ struct adsp_data {
 	int ssctl_id;
 
 	int region_assign_idx;
+	int region_assign_count;
+	bool region_assign_shared;
+	int region_assign_vmid;
 };
 
 struct qcom_adsp {
@@ -87,15 +92,18 @@ struct qcom_adsp {
 	phys_addr_t dtb_mem_phys;
 	phys_addr_t mem_reloc;
 	phys_addr_t dtb_mem_reloc;
-	phys_addr_t region_assign_phys;
+	phys_addr_t region_assign_phys[MAX_ASSIGN_COUNT];
 	void *mem_region;
 	void *dtb_mem_region;
 	size_t mem_size;
 	size_t dtb_mem_size;
-	size_t region_assign_size;
+	size_t region_assign_size[MAX_ASSIGN_COUNT];
 
 	int region_assign_idx;
-	u64 region_assign_perms;
+	int region_assign_count;
+	bool region_assign_shared;
+	int region_assign_vmid;
+	u64 region_assign_perms[MAX_ASSIGN_COUNT];
 
 	struct qcom_rproc_glink glink_subdev;
 	struct qcom_rproc_subdev smd_subdev;
@@ -590,37 +598,52 @@ static int adsp_alloc_memory_region(struct qcom_adsp *adsp)
 
 static int adsp_assign_memory_region(struct qcom_adsp *adsp)
 {
-	struct reserved_mem *rmem = NULL;
-	struct qcom_scm_vmperm perm;
+	struct qcom_scm_vmperm perm[MAX_ASSIGN_COUNT];
+	unsigned int perm_size = 1;
 	struct device_node *node;
-	int ret;
+	int offset, ret;
 
 	if (!adsp->region_assign_idx)
 		return 0;
 
-	node = of_parse_phandle(adsp->dev->of_node, "memory-region", adsp->region_assign_idx);
-	if (node)
-		rmem = of_reserved_mem_lookup(node);
-	of_node_put(node);
-	if (!rmem) {
-		dev_err(adsp->dev, "unable to resolve shareable memory-region\n");
-		return -EINVAL;
-	}
+	for (offset = 0; offset < adsp->region_assign_count; ++offset) {
+		struct reserved_mem *rmem = NULL;
+
+		node = of_parse_phandle(adsp->dev->of_node, "memory-region",
+					adsp->region_assign_idx + offset);
+		if (node)
+			rmem = of_reserved_mem_lookup(node);
+		of_node_put(node);
+		if (!rmem) {
+			dev_err(adsp->dev, "unable to resolve shareable memory-region index %d\n",
+				offset);
+			return -EINVAL;
+		}
 
-	perm.vmid = QCOM_SCM_VMID_MSS_MSA;
-	perm.perm = QCOM_SCM_PERM_RW;
+		if (adsp->region_assign_shared)  {
+			perm[0].vmid = QCOM_SCM_VMID_HLOS;
+			perm[0].perm = QCOM_SCM_PERM_RW;
+			perm[1].vmid = adsp->region_assign_vmid;
+			perm[1].perm = QCOM_SCM_PERM_RW;
+			perm_size = 2;
+		} else {
+			perm[0].vmid = adsp->region_assign_vmid;
+			perm[0].perm = QCOM_SCM_PERM_RW;
+			perm_size = 1;
+		}
 
-	adsp->region_assign_phys = rmem->base;
-	adsp->region_assign_size = rmem->size;
-	adsp->region_assign_perms = BIT(QCOM_SCM_VMID_HLOS);
+		adsp->region_assign_phys[offset] = rmem->base;
+		adsp->region_assign_size[offset] = rmem->size;
+		adsp->region_assign_perms[offset] = BIT(QCOM_SCM_VMID_HLOS);
 
-	ret = qcom_scm_assign_mem(adsp->region_assign_phys,
-				  adsp->region_assign_size,
-				  &adsp->region_assign_perms,
-				  &perm, 1);
-	if (ret < 0) {
-		dev_err(adsp->dev, "assign memory failed\n");
-		return ret;
+		ret = qcom_scm_assign_mem(adsp->region_assign_phys[offset],
+					  adsp->region_assign_size[offset],
+					  &adsp->region_assign_perms[offset],
+					  perm, perm_size);
+		if (ret < 0) {
+			dev_err(adsp->dev, "assign memory %d failed\n", offset);
+			return ret;
+		}
 	}
 
 	return 0;
@@ -629,20 +652,22 @@ static int adsp_assign_memory_region(struct qcom_adsp *adsp)
 static void adsp_unassign_memory_region(struct qcom_adsp *adsp)
 {
 	struct qcom_scm_vmperm perm;
-	int ret;
+	int offset, ret;
 
-	if (!adsp->region_assign_idx)
+	if (!adsp->region_assign_idx || adsp->region_assign_shared)
 		return;
 
-	perm.vmid = QCOM_SCM_VMID_HLOS;
-	perm.perm = QCOM_SCM_PERM_RW;
+	for (offset = 0; offset < adsp->region_assign_count; ++offset) {
+		perm.vmid = QCOM_SCM_VMID_HLOS;
+		perm.perm = QCOM_SCM_PERM_RW;
 
-	ret = qcom_scm_assign_mem(adsp->region_assign_phys,
-				  adsp->region_assign_size,
-				  &adsp->region_assign_perms,
-				  &perm, 1);
-	if (ret < 0)
-		dev_err(adsp->dev, "unassign memory failed\n");
+		ret = qcom_scm_assign_mem(adsp->region_assign_phys[offset],
+					  adsp->region_assign_size[offset],
+					  &adsp->region_assign_perms[offset],
+					  &perm, 1);
+		if (ret < 0)
+			dev_err(adsp->dev, "unassign memory failed\n");
+	}
 }
 
 static int adsp_probe(struct platform_device *pdev)
@@ -696,6 +721,9 @@ static int adsp_probe(struct platform_device *pdev)
 	adsp->info_name = desc->sysmon_name;
 	adsp->decrypt_shutdown = desc->decrypt_shutdown;
 	adsp->region_assign_idx = desc->region_assign_idx;
+	adsp->region_assign_count = min_t(int, MAX_ASSIGN_COUNT, desc->region_assign_count);
+	adsp->region_assign_vmid = desc->region_assign_vmid;
+	adsp->region_assign_shared = desc->region_assign_shared;
 	if (dtb_fw_name) {
 		adsp->dtb_firmware_name = dtb_fw_name;
 		adsp->dtb_pas_id = desc->dtb_pas_id;
@@ -1163,6 +1191,8 @@ static const struct adsp_data sm8550_mpss_resource = {
 	.sysmon_name = "modem",
 	.ssctl_id = 0x12,
 	.region_assign_idx = 2,
+	.region_assign_count = 1,
+	.region_assign_vmid = QCOM_SCM_VMID_MSS_MSA,
 };
 
 static const struct of_device_id adsp_of_match[] = {

-- 
2.34.1

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