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From: "Huang, Sean Z" <sean.z.huang@intel.com>
To: Intel-gfx@lists.freedesktop.org
Cc: kumar.gaurav@intel.com
Subject: [Intel-gfx] [RFC-v23 02/13] drm/i915/pxp: set KCR reg init during the boot time
Date: Mon, 18 Jan 2021 23:43:09 -0800	[thread overview]
Message-ID: <20210119074320.28768-3-sean.z.huang@intel.com> (raw)
In-Reply-To: <20210119074320.28768-1-sean.z.huang@intel.com>

Set the KCR init during the boot time, which is
required by hardware, to allow us doing further
protection operation such as sending commands to
GPU or TEE.

rev21:
    - Remove "#define KCR_INIT_MASK_SHIFT (16)", but still keep the
      macro in this .c file
    - Write KCR_INIT reg inly for gen12 during boot, not required
      for gen13+

Signed-off-by: Huang, Sean Z <sean.z.huang@intel.com>
---
 drivers/gpu/drm/i915/pxp/intel_pxp.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index 9bc3c7e30654..4e9cee7df4f2 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -6,6 +6,12 @@
 #include "intel_pxp.h"
 #include "intel_pxp_context.h"
 
+/* KCR register definitions */
+#define KCR_INIT            _MMIO(0x320f0)
+
+/* Setting KCR Init bit is required after system boot */
+#define KCR_INIT_ALLOW_DISPLAY_ME_WRITES (BIT(14) | (BIT(14) << 16))
+
 void intel_pxp_init(struct intel_pxp *pxp)
 {
 	struct intel_gt *gt = container_of(pxp, struct intel_gt, pxp);
@@ -15,6 +21,9 @@ void intel_pxp_init(struct intel_pxp *pxp)
 
 	intel_pxp_ctx_init(&pxp->ctx);
 
+	if (INTEL_GEN(gt->i915) == 12)
+		intel_uncore_write(gt->uncore, KCR_INIT, KCR_INIT_ALLOW_DISPLAY_ME_WRITES);
+
 	drm_info(&gt->i915->drm, "Protected Xe Path (PXP) protected content support initialized\n");
 }
 
-- 
2.17.1

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  parent reply	other threads:[~2021-01-19  7:43 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-19  7:43 [Intel-gfx] [RFC-v23 00/13] Introduce Intel PXP component - Mesa single session Huang, Sean Z
2021-01-19  7:43 ` [Intel-gfx] [RFC-v23 01/13] drm/i915/pxp: Introduce Intel PXP component Huang, Sean Z
2021-01-21 16:08   ` Chris Wilson
2021-01-19  7:43 ` Huang, Sean Z [this message]
2021-01-21 17:04   ` [Intel-gfx] [RFC-v23 02/13] drm/i915/pxp: set KCR reg init during the boot time Chris Wilson
2021-01-19  7:43 ` [Intel-gfx] [RFC-v23 03/13] drm/i915/pxp: Implement funcs to create the TEE channel Huang, Sean Z
2021-01-19  7:43 ` [Intel-gfx] [RFC-v23 04/13] drm/i915/pxp: Create the arbitrary session after boot Huang, Sean Z
2021-01-19  7:43 ` [Intel-gfx] [RFC-v23 05/13] drm/i915/pxp: Func to send hardware session termination Huang, Sean Z
2021-01-19  7:43 ` [Intel-gfx] [RFC-v23 06/13] drm/i915/pxp: Enable PXP irq worker and callback stub Huang, Sean Z
2021-01-19  7:43 ` [Intel-gfx] [RFC-v23 07/13] drm/i915/pxp: Destroy arb session upon teardown Huang, Sean Z
2021-01-19  7:43 ` [Intel-gfx] [RFC-v23 08/13] drm/i915/pxp: Enable PXP power management Huang, Sean Z
2021-01-19  7:43 ` [Intel-gfx] [RFC-v23 09/13] drm/i915/pxp: Expose session state for display protection flip Huang, Sean Z
2021-01-21 19:47   ` Rodrigo Vivi
2021-01-19  7:43 ` [Intel-gfx] [RFC-v23 10/13] mei: pxp: export pavp client to me client bus Huang, Sean Z
2021-01-19  7:43 ` [Intel-gfx] [RFC-v23 11/13] drm/i915/uapi: introduce drm_i915_gem_create_ext Huang, Sean Z
2021-01-19  7:43 ` [Intel-gfx] [RFC-v23 12/13] drm/i915/pxp: User interface for Protected buffer Huang, Sean Z
2021-01-19  7:43 ` [Intel-gfx] [RFC-v23 13/13] drm/i915/pxp: Add plane decryption support Huang, Sean Z
2021-01-19  9:35   ` Gupta, Anshuman
2021-01-21 20:30     ` Ville Syrjälä
2021-01-21 20:50       ` Gaurav, Kumar
2021-01-21 21:00         ` Ville Syrjälä
2021-01-21 21:34           ` Gaurav, Kumar
2021-01-22 11:58             ` Ville Syrjälä
2021-01-22 17:25               ` Gaurav, Kumar
2021-01-19 12:33 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for Introduce Intel PXP component - Mesa single session (rev23) Patchwork
2021-01-19 13:03 ` [Intel-gfx] ✗ Fi.CI.BAT: failure " Patchwork
2021-01-23 14:18 ` [Intel-gfx] [RFC-v23 00/13] Introduce Intel PXP component - Mesa single session Lionel Landwerlin
2021-01-23 21:47   ` Gaurav, Kumar
2021-01-25 15:38     ` Lionel Landwerlin
2021-01-25 16:22       ` Gaurav, Kumar

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