[PATCH 7/8] arm_ffa: sandbox: Add FFA_MEM_RECLAIM emulation

[abdellatif.elkhlifi at arm.com]

From: Abdellatif El Khlifi <abdellatif.elkhlifi at arm.com>

Add FFA_MEM_RECLAIM support to the FF-A emulator

Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi at arm.com>
---
 drivers/firmware/arm-ffa/ffa-emul-uclass.c | 43 ++++++++++++++++++++++
 drivers/firmware/arm-ffa/sandbox_ffa.c     |  1 +
 2 files changed, 44 insertions(+)

diff --git a/drivers/firmware/arm-ffa/ffa-emul-uclass.c b/drivers/firmware/arm-ffa/ffa-emul-uclass.c
index a859d2e26cc..b628e2c5c63 100644
--- a/drivers/firmware/arm-ffa/ffa-emul-uclass.c
+++ b/drivers/firmware/arm-ffa/ffa-emul-uclass.c
@@ -604,6 +604,46 @@ feedback:
 	return ret;
 }
 
+/**
+ * sandbox_ffa_memory_reclaim() - Emulated FFA_MEM_RECLAIM handler
+ * @emul: The sandbox FF-A emulator device
+ * @pargs: The SMC call input arguments a0-a7
+ * @res:  The SMC return data
+ *
+ * Emulate FFA_MEM_RECLAIM FF-A function.
+ *
+ * Return:
+ *
+ * 0 on success. Otherwise, failure
+ */
+static int sandbox_ffa_memory_reclaim(struct udevice *emul, ffa_value_t *pargs,
+				      ffa_value_t *res)
+{
+	int ret;
+
+	if (pargs->a1 != SANDBOX_MEM_HANDLE ||
+	    pargs->a2 != SANDBOX_MEM_HANDLE) {
+		res->a0 = FFA_SMC_32(FFA_ERROR);
+		res->a2 = -INVALID_PARAMETERS;
+		ret = ffa_to_std_errmap[INVALID_PARAMETERS];
+		goto feedback;
+	}
+
+	res->a0 = FFA_SMC_32(FFA_SUCCESS);
+	res->a2 = 0;
+	ret = 0;
+
+feedback:
+
+	res->a1 = 0;
+	res->a3 = 0;
+
+	/* x4-x7 MBZ */
+	memset(FFA_X4X7_MBZ_REG_START, 0, FFA_X4X7_MBZ_CNT * sizeof(ulong));
+
+	return ret;
+}
+
 /**
  * sandbox_query_ffa_emul_state() - Inspect the FF-A ABIs
  * @queried_func_id:	The FF-A function to be queried
@@ -697,6 +737,9 @@ void sandbox_arm_ffa_smccc_smc(ffa_value_t *args, ffa_value_t *res)
 	case FFA_SMC_32(FFA_MEM_SHARE):
 		ret = sandbox_ffa_memory_share(emul, args, res);
 		break;
+	case FFA_SMC_32(FFA_MEM_RECLAIM):
+		ret = sandbox_ffa_memory_reclaim(emul, args, res);
+		break;
 	default:
 		log_err("Undefined FF-A interface (%lx)\n",
 			args->a0);
diff --git a/drivers/firmware/arm-ffa/sandbox_ffa.c b/drivers/firmware/arm-ffa/sandbox_ffa.c
index a81455ce5ff..8af9c8ac005 100644
--- a/drivers/firmware/arm-ffa/sandbox_ffa.c
+++ b/drivers/firmware/arm-ffa/sandbox_ffa.c
@@ -92,6 +92,7 @@ static const struct ffa_bus_ops sandbox_ffa_ops = {
 	.sync_send_receive = ffa_msg_send_direct_req_hdlr,
 	.rxtx_unmap = ffa_unmap_rxtx_buffers_hdlr,
 	.memory_share = ffa_memory_share_hdlr,
+	.memory_reclaim = ffa_memory_reclaim_hdlr,
 };
 
 static const struct udevice_id sandbox_ffa_id[] = {
-- 
2.25.1