kernel: ahci: Create a DCDR per HBA device

Optimize reading of logical blocks within SATA drives by giving each
device descriptor a drive cache descriptor ring.

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/sys/include/dev/ic/ahcivar.h b/sys/include/dev/ic/ahcivar.h
index fa24812..a23a654 100644
--- a/sys/include/dev/ic/ahcivar.h
+++ b/sys/include/dev/ic/ahcivar.h
@@ -33,9 +33,12 @@
 #include <sys/param.h>
 #include <sys/types.h>
 #include <sys/device.h>
+#include <dev/dcdr/cache.h>
 #include <dev/ic/ahciregs.h>
 #include <fs/ctlfs.h>
 
+#define AHCI_DCDR_CAP 16
+
 struct ahci_cmd_hdr;
 extern const struct ctlops g_sata_bsize_ops;
 
@@ -100,6 +103,7 @@ struct hba_device {
     struct hba_port *io;
     struct ahci_hba *hba;
     struct ahci_cmd_hdr *cmdlist;
+    struct dcdr *dcdr;
     void *fra;
     dev_t dev;
 };