The full authentication via the GSC requires an heci packet submission
to the GSC FW via the GSC CS. The GSC has new PXP command for this
(literally called NEW_HUC_AUTH).
The intel_huc_auth fuction is also updated to handle both authentication
types.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Cc: Alan Previn <alan.previn.teres.alexis@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/uc/intel_gsc_uc.c | 24 ++++-
.../i915/gt/uc/intel_gsc_uc_heci_cmd_submit.c | 2 +-
drivers/gpu/drm/i915/gt/uc/intel_huc.c | 50 +++++++---
drivers/gpu/drm/i915/gt/uc/intel_huc.h | 6 +-
drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c | 94 +++++++++++++++++++
drivers/gpu/drm/i915/gt/uc/intel_huc_fw.h | 1 +
drivers/gpu/drm/i915/gt/uc/intel_uc.c | 2 +-
.../drm/i915/pxp/intel_pxp_cmd_interface_43.h | 14 ++-
drivers/gpu/drm/i915/pxp/intel_pxp_huc.c | 2 +-
9 files changed, 173 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_gsc_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_gsc_uc.c
index af542e3cb3e9..b6d0ee1660b2 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_gsc_uc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_gsc_uc.c
@@ -29,13 +29,29 @@ static void gsc_work(struct work_struct *work)
if (actions & GSC_ACTION_FW_LOAD) {
ret = intel_gsc_uc_fw_upload(gsc);
- if (ret == -EEXIST) /* skip proxy if not a new load */
- actions &= ~GSC_ACTION_FW_LOAD;
- else if (ret)
+ if (!ret)
+ /* setup proxy on a new load */
+ actions |= GSC_ACTION_SW_PROXY;
+ else if (ret != -EEXIST)
goto out_put;
+
+ /*
+ * The HuC auth can be done both before or after the proxy init;
+ * if done after, a proxy request will be issued and must be
+ * serviced before the authentication can complete.
+ * Since this worker also handles proxy requests, we can't
+ * perform an action that requires the proxy from within it and
+ * then stall waiting for it, because we'd be blocking the
+ * service path. Therefore, it is easier for us to load HuC
+ * first and do proxy later. The GSC will ack the HuC auth and
+ * then send the HuC proxy request as part of the proxy init
+ * flow.
+ */
+ if (intel_uc_uses_huc(>->uc))
+ intel_huc_auth(>->uc.huc, INTEL_HUC_AUTH_BY_GSC);
}
- if (actions & (GSC_ACTION_FW_LOAD | GSC_ACTION_SW_PROXY)) {
+ if (actions & GSC_ACTION_SW_PROXY) {
if (!intel_gsc_uc_fw_init_done(gsc)) {
gt_err(gt, "Proxy request received with GSC not loaded!\n");
goto out_put;
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_gsc_uc_heci_cmd_submit.c b/drivers/gpu/drm/i915/gt/uc/intel_gsc_uc_heci_cmd_submit.c
index ea0da06e2f39..edcfa990239d 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_gsc_uc_heci_cmd_submit.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_gsc_uc_heci_cmd_submit.c
@@ -98,7 +98,7 @@ void intel_gsc_uc_heci_cmd_emit_mtl_header(struct intel_gsc_mtl_header *header,
u64 host_session_id)
{
host_session_id &= ~HOST_SESSION_MASK;
- if (heci_client_id == HECI_MEADDRESS_PXP)
+ if (host_session_id && heci_client_id == HECI_MEADDRESS_PXP)
host_session_id |= HOST_SESSION_PXP_SINGLE;
header->validity_marker = GSC_HECI_VALIDITY_MARKER;
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc.c b/drivers/gpu/drm/i915/gt/uc/intel_huc.c
index cc3c9cb2319c..21621d7439ba 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_huc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc.c
@@ -347,20 +347,34 @@ static int check_huc_loading_mode(struct intel_huc *huc)
int intel_huc_init(struct intel_huc *huc)
{
+ struct intel_gt *gt = huc_to_gt(huc);
int err;
err = check_huc_loading_mode(huc);
if (err)
goto out;
+ if (HAS_ENGINE(gt, GSC0)) {
+ struct i915_vma *vma = intel_guc_allocate_vma(>->uc.guc, SZ_8K);
+ if (IS_ERR(vma)) {
+ huc_info(huc, "Failed to allocate heci pkt\n");
+ goto out;
+ }
+
+ huc->heci_pkt = vma;
+ }
+
err = intel_uc_fw_init(&huc->fw);
if (err)
- goto out;
+ goto out_pkt;
intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_LOADABLE);
return 0;
+out_pkt:
+ if (huc->heci_pkt)
+ i915_vma_unpin_and_release(&huc->heci_pkt, 0);
out:
intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_INIT_FAIL);
huc_info(huc, "initialization failed %pe\n", ERR_PTR(err));
@@ -375,6 +389,9 @@ void intel_huc_fini(struct intel_huc *huc)
*/
delayed_huc_load_fini(huc);
+ if (huc->heci_pkt)
+ i915_vma_unpin_and_release(&huc->heci_pkt, 0);
+
if (intel_uc_fw_is_loadable(&huc->fw))
intel_uc_fw_fini(&huc->fw);
}
@@ -431,6 +448,7 @@ int intel_huc_wait_for_auth_complete(struct intel_huc *huc,
/**
* intel_huc_auth() - Authenticate HuC uCode
* @huc: intel_huc structure
+ * @type: authentication type (via GuC or via GSC)
*
* Called after HuC and GuC firmware loading during intel_uc_init_hw().
*
@@ -438,7 +456,7 @@ int intel_huc_wait_for_auth_complete(struct intel_huc *huc,
* passing the offset of the RSA signature to intel_guc_auth_huc(). It then
* waits for up to 50ms for firmware verification ACK.
*/
-int intel_huc_auth(struct intel_huc *huc)
+int intel_huc_auth(struct intel_huc *huc, enum intel_huc_authentication_type type)
{
struct intel_gt *gt = huc_to_gt(huc);
struct intel_guc *guc = >->uc.guc;
@@ -447,31 +465,41 @@ int intel_huc_auth(struct intel_huc *huc)
if (!intel_uc_fw_is_loaded(&huc->fw))
return -ENOEXEC;
- /* GSC will do the auth */
+ /* GSC will do the auth with the load */
if (intel_huc_is_loaded_by_gsc(huc))
return -ENODEV;
+ if (intel_huc_is_authenticated(huc, type))
+ return -EEXIST;
+
ret = i915_inject_probe_error(gt->i915, -ENXIO);
if (ret)
goto fail;
- GEM_BUG_ON(intel_uc_fw_is_running(&huc->fw));
-
- ret = intel_guc_auth_huc(guc, intel_guc_ggtt_offset(guc, huc->fw.rsa_data));
- if (ret) {
- huc_err(huc, "authentication by GuC failed %pe\n", ERR_PTR(ret));
- goto fail;
+ switch(type) {
+ case INTEL_HUC_AUTH_BY_GUC:
+ ret = intel_guc_auth_huc(guc, intel_guc_ggtt_offset(guc, huc->fw.rsa_data));
+ break;
+ case INTEL_HUC_AUTH_BY_GSC:
+ ret = intel_huc_fw_auth_via_gsccs(huc);
+ break;
+ default:
+ MISSING_CASE(type);
+ ret = -EINVAL;
}
+ if (ret)
+ goto fail;
/* Check authentication status, it should be done by now */
- ret = intel_huc_wait_for_auth_complete(huc, INTEL_HUC_AUTH_BY_GUC);
+ ret = intel_huc_wait_for_auth_complete(huc, type);
if (ret)
goto fail;
return 0;
fail:
- huc_probe_error(huc, "authentication failed %pe\n", ERR_PTR(ret));
+ huc_probe_error(huc, "%s authentication failed %pe\n",
+ auth_mode_string(huc, type), ERR_PTR(ret));
return ret;
}
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc.h b/drivers/gpu/drm/i915/gt/uc/intel_huc.h
index adb063cd27a0..319d38c4ab51 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_huc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc.h
@@ -15,6 +15,7 @@
#include <linux/hrtimer.h>
struct bus_type;
+struct i915_vma;
enum intel_huc_delayed_load_status {
INTEL_HUC_WAITING_ON_GSC = 0,
@@ -46,6 +47,9 @@ struct intel_huc {
enum intel_huc_delayed_load_status status;
} delayed_load;
+ /* for load via GSCCS */
+ struct i915_vma *heci_pkt;
+
bool loaded_via_gsc;
};
@@ -54,7 +58,7 @@ void intel_huc_init_early(struct intel_huc *huc);
int intel_huc_init(struct intel_huc *huc);
void intel_huc_fini(struct intel_huc *huc);
void intel_huc_suspend(struct intel_huc *huc);
-int intel_huc_auth(struct intel_huc *huc);
+int intel_huc_auth(struct intel_huc *huc, enum intel_huc_authentication_type type);
int intel_huc_wait_for_auth_complete(struct intel_huc *huc,
enum intel_huc_authentication_type type);
bool intel_huc_is_authenticated(struct intel_huc *huc,
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
index 3b8edaba97d2..feb951a793ea 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
@@ -6,11 +6,105 @@
#include "gt/intel_gsc.h"
#include "gt/intel_gt.h"
#include "intel_gsc_meu_headers.h"
+#include "intel_gsc_uc_heci_cmd_submit.h"
#include "intel_huc.h"
#include "intel_huc_fw.h"
#include "intel_huc_print.h"
#include "i915_drv.h"
#include "pxp/intel_pxp_huc.h"
+#include "pxp/intel_pxp_cmd_interface_43.h"
+
+struct mtl_huc_auth_msg_in {
+ struct intel_gsc_mtl_header header;
+ struct pxp43_new_huc_auth_in huc_in;
+} __packed;
+
+struct mtl_huc_auth_msg_out {
+ struct intel_gsc_mtl_header header;
+ struct pxp43_huc_auth_out huc_out;
+} __packed;
+
+int intel_huc_fw_auth_via_gsccs(struct intel_huc *huc)
+{
+ struct intel_gt *gt = huc_to_gt(huc);
+ struct drm_i915_private *i915 = gt->i915;
+ struct drm_i915_gem_object *obj;
+ struct mtl_huc_auth_msg_in *msg_in;
+ struct mtl_huc_auth_msg_out *msg_out;
+ void *pkt_vaddr;
+ u64 pkt_offset;
+ int retry = 5;
+ int err = 0;
+
+ if (!huc->heci_pkt)
+ return -ENODEV;
+
+ obj = huc->heci_pkt->obj;
+ pkt_offset = i915_ggtt_offset(huc->heci_pkt);
+
+ pkt_vaddr = i915_gem_object_pin_map_unlocked(obj,
+ i915_coherent_map_type(i915, obj, true));
+ if (IS_ERR(pkt_vaddr))
+ return PTR_ERR(pkt_vaddr);
+
+ msg_in = pkt_vaddr;
+ msg_out = pkt_vaddr + SZ_4K;
+
+ intel_gsc_uc_heci_cmd_emit_mtl_header(&msg_in->header,
+ HECI_MEADDRESS_PXP,
+ sizeof(*msg_in), 0);
+
+ msg_in->huc_in.header.api_version = PXP_APIVER(4, 3);
+ msg_in->huc_in.header.command_id = PXP43_CMDID_NEW_HUC_AUTH;
+ msg_in->huc_in.header.status = 0;
+ msg_in->huc_in.header.buffer_len = sizeof(msg_in->huc_in) -
+ sizeof(msg_in->huc_in.header);
+ msg_in->huc_in.huc_base_address = huc->fw.dummy.start;
+ msg_in->huc_in.huc_size = huc->fw.obj->base.size;
+
+ do {
+ err = intel_gsc_uc_heci_cmd_submit_packet(>->uc.gsc,
+ pkt_offset, sizeof(*msg_in),
+ pkt_offset + SZ_4K, SZ_4K);
+ if (err) {
+ huc_err(huc, "failed to submit GSC request to auth: %d\n", err);
+ goto out_unpin;
+ }
+
+ if (msg_out->header.flags & GSC_OUTFLAG_MSG_PENDING) {
+ msg_in->header.gsc_message_handle = msg_out->header.gsc_message_handle;
+ err = -EBUSY;
+ msleep(50);
+ }
+ } while (--retry && err == -EBUSY);
+
+ if (err)
+ goto out_unpin;
+
+ if (msg_out->header.message_size != sizeof(*msg_out)) {
+ huc_err(huc, "invalid GSC reply length %u [expected %zu]\n",
+ msg_out->header.message_size, sizeof(*msg_out));
+ err = -EPROTO;
+ goto out_unpin;
+ }
+
+ /*
+ * The GSC will return PXP_STATUS_OP_NOT_PERMITTED if the HuC is already
+ * loaded. If the same error is ever returned with HuC not loaded we'll
+ * still catch it when we check the authentication bit later.
+ */
+ if (msg_out->huc_out.header.status != PXP_STATUS_SUCCESS &&
+ msg_out->huc_out.header.status != PXP_STATUS_OP_NOT_PERMITTED) {
+ huc_err(huc, "auth failed with GSC error = 0x%x\n",
+ msg_out->huc_out.header.status);
+ err = -EIO;
+ goto out_unpin;
+ }
+
+out_unpin:
+ i915_gem_object_unpin_map(obj);
+ return err;
+}
static void get_version_from_meu_manifest(struct intel_uc_fw_ver *ver, const void *data)
{
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.h b/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.h
index 0999ffe6f962..307ab45e6b09 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.h
@@ -12,6 +12,7 @@ struct intel_uc_fw;
#include <linux/types.h>
int intel_huc_fw_load_and_auth_via_gsc(struct intel_huc *huc);
+int intel_huc_fw_auth_via_gsccs(struct intel_huc *huc);
int intel_huc_fw_upload(struct intel_huc *huc);
int intel_huc_fw_get_binary_info(struct intel_uc_fw *huc_fw, const void *data, size_t size);
#endif
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
index b6adfda3761e..05ad56274007 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
@@ -535,7 +535,7 @@ static int __uc_init_hw(struct intel_uc *uc)
if (intel_huc_is_loaded_by_gsc(huc))
intel_huc_update_auth_status(huc);
else
- intel_huc_auth(huc);
+ intel_huc_auth(huc, INTEL_HUC_AUTH_BY_GUC);
if (intel_uc_uses_guc_submission(uc)) {
ret = intel_guc_submission_enable(guc);
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_cmd_interface_43.h b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd_interface_43.h
index ad67e3f49c20..ac7a3829dda6 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_cmd_interface_43.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd_interface_43.h
@@ -11,15 +11,23 @@
/* PXP-Cmd-Op definitions */
#define PXP43_CMDID_START_HUC_AUTH 0x0000003A
+#define PXP43_CMDID_NEW_HUC_AUTH 0x0000003F /* MTL+ */
-/* PXP-Input-Packet: HUC-Authentication */
+/* PXP-Input-Packet: HUC Load and Authentication */
struct pxp43_start_huc_auth_in {
struct pxp_cmd_header header;
__le64 huc_base_address;
} __packed;
-/* PXP-Output-Packet: HUC-Authentication */
-struct pxp43_start_huc_auth_out {
+/* PXP-Input-Packet: HUC Auth-only */
+struct pxp43_new_huc_auth_in {
+ struct pxp_cmd_header header;
+ u64 huc_base_address;
+ u32 huc_size;
+} __packed;
+
+/* PXP-Output-Packet: HUC Load and Authentication or Auth-only */
+struct pxp43_huc_auth_out {
struct pxp_cmd_header header;
} __packed;
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_huc.c b/drivers/gpu/drm/i915/pxp/intel_pxp_huc.c
index 23431c36b60b..5eedce916942 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_huc.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_huc.c
@@ -19,7 +19,7 @@ int intel_pxp_huc_load_and_auth(struct intel_pxp *pxp)
struct intel_gt *gt;
struct intel_huc *huc;
struct pxp43_start_huc_auth_in huc_in = {0};
- struct pxp43_start_huc_auth_out huc_out = {0};
+ struct pxp43_huc_auth_out huc_out = {0};
dma_addr_t huc_phys_addr;
u8 client_id = 0;
u8 fence_id = 0;
--
2.40.0
