[rtems-libbsd commit] NVME(4): Add SGL descriptor
Sebastian Huber
sebh at rtems.org
Thu Nov 14 06:05:46 UTC 2019
Module: rtems-libbsd
Branch: 5-freebsd-12
Commit: 90a95b575dae6b177c44e7ea0fd739e709ca4810
Changeset: http://git.rtems.org/rtems-libbsd/commit/?id=90a95b575dae6b177c44e7ea0fd739e709ca4810
Author: Sebastian Huber <sebastian.huber at embedded-brains.de>
Date: Thu Sep 19 07:29:24 2019 +0200
NVME(4): Add SGL descriptor
Update #3821.
---
freebsd/sys/dev/nvme/nvme.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/freebsd/sys/dev/nvme/nvme.h b/freebsd/sys/dev/nvme/nvme.h
index 0d4a18b..27259dc 100644
--- a/freebsd/sys/dev/nvme/nvme.h
+++ b/freebsd/sys/dev/nvme/nvme.h
@@ -488,6 +488,20 @@ enum nvme_critical_warning_state {
#define NVME_SS_PAGE_SSTAT_GDE_SHIFT (8)
#define NVME_SS_PAGE_SSTAT_GDE_MASK (0x1)
+/* SGL descriptor field definitions */
+#define NVME_SGL_IDENT_TYPE_DATA_BLOCK (0)
+#define NVME_SGL_IDENT_TYPE_BIT_BUCKET (1)
+#define NVME_SGL_IDENT_TYPE_SEG_DESC (2)
+#define NVME_SGL_IDENT_TYPE_LAST_SEG_DESC (3)
+#define NVME_SGL_IDENT_TYPE_KEYED_DATA_BLOCK (4)
+#define NVME_SGL_IDENT_TYPE_VENDOR (0xf)
+#define NVME_SGL_IDENT_TYPE_SHIFT (4)
+#define NVME_SGL_IDENT_TYPE_MASK (0xf)
+#define NVME_SGL_IDENT_SUB_TYPE_ADDRESS (0)
+#define NVME_SGL_IDENT_SUB_TYPE_OFFSET (0x1)
+#define NVME_SGL_IDENT_SUB_TYPE_SHIFT (0)
+#define NVME_SGL_IDENT_SUB_TYPE_MASK (0xf)
+
/* CC register SHN field values */
enum shn_value {
NVME_SHN_NORMAL = 0x1,
@@ -1451,6 +1465,16 @@ struct nvme_resv_status_ext
_Static_assert(sizeof(struct nvme_resv_status_ext) == 64, "bad size for nvme_resv_status_ext");
+struct nvme_sgl_desc
+{
+ uint64_t address;
+ uint32_t length;
+ uint8_t reserved12[3];
+ uint8_t sgl_ident;
+} __packed __aligned(8);
+
+_Static_assert(sizeof(struct nvme_sgl_desc) == 16, "bad size for nvme_sgl_desc");
+
#define NVME_TEST_MAX_THREADS 128
struct nvme_io_test {
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