Commit 698de37f authored by Ling Xu's avatar Ling Xu Committed by Greg Kroah-Hartman
Browse files

misc: fastrpc: add support for gdsp remoteproc 



Some platforms (like lemans) feature one or more GPDSPs (General
Purpose DSPs). Similar to other kinds of Hexagon DSPs, they provide
a FastRPC implementation, allowing code execution in both signed and
unsigned protection domains. Extend the checks to allow domain names
starting with "gdsp" (possibly followed by an index).

Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: default avatarEkansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: default avatarLing Xu <quic_lxu5@quicinc.com>
Signed-off-by: default avatarSrinivas Kandagatla <srini@kernel.org>
Link: https://lore.kernel.org/r/20250912131302.303199-5-srini@kernel.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent fb4679f6

drivers/misc/fastrpc.c

+5 −1
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#define MDSP_DOMAIN_ID (1)

#define SDSP_DOMAIN_ID (2)

#define CDSP_DOMAIN_ID (3)

#define GDSP_DOMAIN_ID (4)

#define FASTRPC_MAX_SESSIONS	14

#define FASTRPC_MAX_VMIDS	16

#define FASTRPC_ALIGN		128
@@ -2249,6 +2250,8 @@ static int fastrpc_get_domain_id(const char *domain) 
		return MDSP_DOMAIN_ID;

	else if (!strncmp(domain, "sdsp", 4))

		return SDSP_DOMAIN_ID;

	else if (!strncmp(domain, "gdsp", 4))

		return GDSP_DOMAIN_ID;



	return -EINVAL;

}
@@ -2318,13 +2321,14 @@ static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 
	case ADSP_DOMAIN_ID:

	case MDSP_DOMAIN_ID:

	case SDSP_DOMAIN_ID:

		/* Unsigned PD offloading is only supported on CDSP */

		/* Unsigned PD offloading is only supported on CDSP and GDSP */

		data->unsigned_support = false;

		err = fastrpc_device_register(rdev, data, secure_dsp, domain);

		if (err)

			goto err_free_data;

		break;

	case CDSP_DOMAIN_ID:

	case GDSP_DOMAIN_ID:

		data->unsigned_support = true;

		/* Create both device nodes so that we can allow both Signed and Unsigned PD */

		err = fastrpc_device_register(rdev, data, true, domain);