From 08f0e4a7ecb9e20f27b9d410bcba84e662fffe3b Mon Sep 17 00:00:00 2001
From: Michal Wajdeczko <michal.wajdeczko@intel.com>
Date: Fri, 26 Jul 2019 18:42:12 +0000
Subject: drm/i915/uc: Remove redundant RSA offset definition
Git-commit: 08f0e4a7ecb9e20f27b9d410bcba84e662fffe3b
Patch-mainline: v5.4-rc1
References: bsc#1152489

According to Firmware layout definition, RSA signature is located
after CSS header and uCode so actual RSA offset in the blob can be
easily calculated when needed (and we need it only once).

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190726184212.1836-3-michal.wajdeczko@intel.com
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c | 8 +++-----
 drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h | 1 -
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
index 16ab9bc92919..0bad9b858501 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
@@ -238,7 +238,6 @@ void intel_uc_fw_fetch(struct intel_uc_fw *uc_fw, struct drm_i915_private *i915)
 		err = -ENOEXEC;
 		goto fail;
 	}
-	uc_fw->rsa_offset = sizeof(struct uc_css_header) + uc_fw->ucode_size;
 	uc_fw->rsa_size = css->key_size_dw * sizeof(u32);
 
 	/* At least, it should have header, uCode and RSA. Size of all three. */
@@ -512,11 +511,11 @@ size_t intel_uc_fw_copy_rsa(struct intel_uc_fw *uc_fw, void *dst, u32 max_len)
 {
 	struct sg_table *pages = uc_fw->obj->mm.pages;
 	u32 size = min_t(u32, uc_fw->rsa_size, max_len);
+	u32 offset = sizeof(struct uc_css_header) + uc_fw->ucode_size;
 
 	GEM_BUG_ON(!intel_uc_fw_is_available(uc_fw));
 
-	return sg_pcopy_to_buffer(pages->sgl, pages->nents,
-				  dst, size, uc_fw->rsa_offset);
+	return sg_pcopy_to_buffer(pages->sgl, pages->nents, dst, size, offset);
 }
 
 /**
@@ -536,6 +535,5 @@ void intel_uc_fw_dump(const struct intel_uc_fw *uc_fw, struct drm_printer *p)
 		   uc_fw->major_ver_wanted, uc_fw->minor_ver_wanted,
 		   uc_fw->major_ver_found, uc_fw->minor_ver_found);
 	drm_printf(p, "\tuCode: %u bytes\n", uc_fw->ucode_size);
-	drm_printf(p, "\tRSA: offset %u, size %u\n",
-		   uc_fw->rsa_offset, uc_fw->rsa_size);
+	drm_printf(p, "\tRSA: %u bytes\n", uc_fw->rsa_size);
 }
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h
index 6a04bc6d419f..c2ab2803715d 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h
@@ -75,7 +75,6 @@ struct intel_uc_fw {
 	u16 minor_ver_found;
 
 	u32 rsa_size;
-	u32 rsa_offset;
 	u32 ucode_size;
 };
 
-- 
2.28.0