Re: [PATCH 3/3] drm/i915/uc: Update drawing for firmware layout

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On 7/24/19 1:09 PM, Michal Wajdeczko wrote:
On Wed, 24 Jul 2019 19:44:46 +0200, Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx> wrote:



On 7/24/19 10:34 AM, Michal Wajdeczko wrote:
Sphinx was rendering firmware layout as html table, but since
we want to add sizes relations switch to plain text graphics.
 Signed-off-by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
---
  drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h | 25 +++++++++-----------
  1 file changed, 11 insertions(+), 14 deletions(-)
 diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h
index 3ca535534151..e25271aac765 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h
@@ -11,21 +11,18 @@
  /**
   * DOC: GuC Firmware Layout
   *
- * The GuC firmware layout looks like this:
+ * The GuC firmware layout looks like this::
   *
- *     +-------------------------------+
- *     |         uc_css_header         |
- *     |                               |
- *     | contains major/minor version  |
- *     +-------------------------------+
- *     |             uCode             |
- *     +-------------------------------+
- *     |         RSA signature         |
- *     +-------------------------------+
- *     |          modulus key          |
- *     +-------------------------------+
- *     |          exponent val         |
- *     +-------------------------------+
+ * +======================================================================+ + *      |  Firmware blob                                                       | + * +===============+===============+============+============+============+ + *      |  CSS header   |     uCode     |    key     |  modulus   | exponent  | + * +===============+===============+============+============+============+

What about the RSA?

key == RSA key == RSA signature

I followed notation from our header definition which uses "key_size"
but maybe it was too brave. What about "RSA key" to have a match ?


Works for me.

Daniele


Daniele

+ *       <-header size->                 <---header size continued -----------> + *       <--- size ----------------------------------------------------------->
+ *                                       <-key size->
+ *                                                    <-mod size->
+ * <-exp size->
   *
   * The firmware may or may not have modulus key and exponent data. The header,    * uCode and RSA signature are must-have components that will be used by driver.
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