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drm/xe/pxp: Add GSC session initialization support

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A session is initialized (i.e. started) by sending a message to the GSC.
The initialization will be triggered when a user opts-in to using PXP;
the interface for that is coming in a follow-up patch in the series.

v2: clean up error messages, use new ARB define (John)

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250129174140.948829-7-daniele.ceraolospurio@intel.com
This commit is contained in:
Daniele Ceraolo Spurio
2025-01-29 09:41:30 -08:00
parent 3b506d73ec
commit 0387d46ea7
3 changed files with 69 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/gpu/drm/xe/abi/gsc_pxp_commands_abi.h
View File

@@ -51,6 +51,7 @@ struct pxp_cmd_header {
} __packed;
#define PXP43_CMDID_INVALIDATE_STREAM_KEY 0x00000007
#define PXP43_CMDID_INIT_SESSION 0x00000036
#define PXP43_CMDID_NEW_HUC_AUTH 0x0000003F /* MTL+ */
/* PXP-Input-Packet: HUC Auth-only */
@@ -65,6 +66,26 @@ struct pxp43_huc_auth_out {
struct pxp_cmd_header header;
} __packed;
/* PXP-Input-Packet: Init PXP session */
struct pxp43_create_arb_in {
struct pxp_cmd_header header;
/* header.stream_id fields for vesion 4.3 of Init PXP session: */
#define PXP43_INIT_SESSION_VALID BIT(0)
#define PXP43_INIT_SESSION_APPTYPE BIT(1)
#define PXP43_INIT_SESSION_APPID GENMASK(17, 2)
u32 protection_mode;
#define PXP43_INIT_SESSION_PROTECTION_ARB 0x2
u32 sub_session_id;
u32 init_flags;
u32 rsvd[12];
} __packed;
/* PXP-Input-Packet: Init PXP session */
struct pxp43_create_arb_out {
struct pxp_cmd_header header;
u32 rsvd[8];
} __packed;
/* PXP-Input-Packet: Invalidate Stream Key */
struct pxp43_inv_stream_key_in {
struct pxp_cmd_header header;

47
drivers/gpu/drm/xe/xe_pxp_submit.c
View File

@@ -16,6 +16,7 @@
#include "xe_gt.h"
#include "xe_lrc.h"
#include "xe_map.h"
#include "xe_pxp.h"
#include "xe_pxp_types.h"
#include "xe_sched_job.h"
#include "xe_vm.h"
@@ -490,6 +491,52 @@ static int gsccs_send_message(struct xe_pxp_gsc_client_resources *gsc_res,
return ret;
}
/**
* xe_pxp_submit_session_init - submits a PXP GSC session initialization
* @gsc_res: the pxp client resources
* @id: the session to initialize
*
* Submit a message to the GSC FW to initialize (i.e. start) a PXP session.
*
* Returns 0 if the submission is successful, an errno value otherwise.
*/
int xe_pxp_submit_session_init(struct xe_pxp_gsc_client_resources *gsc_res, u32 id)
{
struct xe_device *xe = gsc_res->vm->xe;
struct pxp43_create_arb_in msg_in = {0};
struct pxp43_create_arb_out msg_out = {0};
int ret;
msg_in.header.api_version = PXP_APIVER(4, 3);
msg_in.header.command_id = PXP43_CMDID_INIT_SESSION;
msg_in.header.stream_id = (FIELD_PREP(PXP43_INIT_SESSION_APPID, id) |
FIELD_PREP(PXP43_INIT_SESSION_VALID, 1) |
FIELD_PREP(PXP43_INIT_SESSION_APPTYPE, 0));
msg_in.header.buffer_len = sizeof(msg_in) - sizeof(msg_in.header);
if (id == DRM_XE_PXP_HWDRM_DEFAULT_SESSION)
msg_in.protection_mode = PXP43_INIT_SESSION_PROTECTION_ARB;
ret = gsccs_send_message(gsc_res, &msg_in, sizeof(msg_in),
&msg_out, sizeof(msg_out));
if (ret) {
drm_err(&xe->drm, "Failed to init PXP session %u (%pe)\n", id, ERR_PTR(ret));
} else if (msg_out.header.status != 0) {
ret = -EIO;
if (is_fw_err_platform_config(msg_out.header.status))
drm_info_once(&xe->drm,
"Failed to init PXP session %u due to BIOS/SOC, s=0x%x(%s)\n",
id, msg_out.header.status,
fw_err_to_string(msg_out.header.status));
else
drm_dbg(&xe->drm, "Failed to init PXP session %u, s=0x%x\n",
id, msg_out.header.status);
}
return ret;
}
/**
* xe_pxp_submit_session_invalidation - submits a PXP GSC invalidation
* @gsc_res: the pxp client resources

1
drivers/gpu/drm/xe/xe_pxp_submit.h
View File

@@ -14,6 +14,7 @@ struct xe_pxp_gsc_client_resources;
int xe_pxp_allocate_execution_resources(struct xe_pxp *pxp);
void xe_pxp_destroy_execution_resources(struct xe_pxp *pxp);
int xe_pxp_submit_session_init(struct xe_pxp_gsc_client_resources *gsc_res, u32 id);
int xe_pxp_submit_session_termination(struct xe_pxp *pxp, u32 id);
int xe_pxp_submit_session_invalidation(struct xe_pxp_gsc_client_resources *gsc_res,
u32 id);