From 4c47d7b7656c64e35673a45c1bfe8a6a002174cc Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Fri, 9 May 2025 20:35:07 -0400
Subject: kernel: ahci: Add command table + PRD definition

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/include/dev/ic/ahcivar.h | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to 'sys/include/dev/ic')

diff --git a/sys/include/dev/ic/ahcivar.h b/sys/include/dev/ic/ahcivar.h
index 98fdf81..4b6cf12 100644
--- a/sys/include/dev/ic/ahcivar.h
+++ b/sys/include/dev/ic/ahcivar.h
@@ -106,6 +106,38 @@ struct ahci_cmd_hdr {
     uint32_t rsvd1[4];
 };
 
+/*
+ * Physical region descriptor
+ *
+ * @dba: Data base address
+ * @rsvd0: Reserved
+ * @dbc: Count
+ * @rsvd1: Reserved
+ * @i: Interrupt on completion
+ */
+struct ahci_prdt_entry {
+    uintptr_t dba;
+    uint32_t rsvd0;
+    uint32_t dbc : 22;
+    uint16_t rsvd1 : 9;
+    uint8_t i : 1;
+};
+
+/*
+ * Command table
+ *
+ * @cfis: Command FIS
+ * @acmd: ATAPI command
+ * @rsvd: Reserved
+ * @prdt: Physical region descriptors
+ */
+struct ahci_cmdtab {
+    uint8_t cfis[64];
+    uint8_t acmd[16];
+    uint8_t rsvd[48];
+    struct ahci_prdt_entry prdt[1];
+};
+
 /*
  * Host to device FIS
  *
-- 
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