From 04fa82397e3a58a496e9d6883eb7495ef3ecea64 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Sun, 2 Jun 2024 23:08:43 -0400
Subject: kernel: ahci: Add SATA read/write support

This commit introduces SATA read/write support and exposes SATA devices
to userland as /dev/sdN files

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/include/dev/ic/ahcivar.h | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

(limited to 'sys/include/dev/ic/ahcivar.h')

diff --git a/sys/include/dev/ic/ahcivar.h b/sys/include/dev/ic/ahcivar.h
index 0b945ae..edef4f6 100644
--- a/sys/include/dev/ic/ahcivar.h
+++ b/sys/include/dev/ic/ahcivar.h
@@ -33,6 +33,7 @@
 #include <sys/types.h>
 #include <sys/cdefs.h>
 #include <sys/mutex.h>
+#include <sys/queue.h>
 #include <dev/ic/ahciregs.h>
 
 struct ata_identity {
@@ -113,6 +114,13 @@ struct ahci_fis_h2d {
     uint8_t rsvd1[4];
 };
 
+struct ahci_device {
+    struct ahci_hba *hba;
+    struct hba_port *port;
+    dev_t minor;
+    TAILQ_ENTRY(ahci_device) link;
+};
+
 struct ahci_hba {
     struct hba_memspace *abar;
     struct ahci_cmd_hdr *cmdlist;
@@ -121,8 +129,10 @@ struct ahci_hba {
 };
 
 /* Commands */
-#define ATA_CMD_NOP      0x00
-#define ATA_CMD_IDENTIFY 0xEC
+#define ATA_CMD_NOP         0x00
+#define ATA_CMD_IDENTIFY    0xEC
+#define ATA_CMD_READ_DMA    0x25
+#define ATA_CMD_WRITE_DMA   0x35
 
 /* FIS types */
 #define FIS_TYPE_H2D 0x27
-- 
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