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misc: fastrpc: add support for gdsp remoteproc

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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: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Ling Xu <quic_lxu5@quicinc.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://lore.kernel.org/r/20250912131302.303199-5-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ling Xu 2025-09-12 14:13:02 +01:00 committed by Greg Kroah-Hartman
parent fb4679f628
commit 698de37f78
1 changed files with 5 additions and 1 deletions
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6
drivers/misc/fastrpc.c
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@ -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);