[PATCH RFC v3 11/12] hw/block/nvme: support multiple lba formats

[Klaus Jensen <its@irrelevant.dk>]

From: Minwoo Im <minwoo.im@samsung.com>

This patch introduces multiple LBA formats supported with the typical
logical block sizes of 512 bytes and 4096 bytes as well as metadata
sizes of 0, 8, 16 and 64 bytes. The format will be chosed based on the
lbads and ms parameters of the nvme-ns device.

Signed-off-by: Minwoo Im <minwoo.im@samsung.com>
[k.jensen: resurrected and rebased]
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/block/nvme-ns.c | 60 +++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 52 insertions(+), 8 deletions(-)

diff --git a/hw/block/nvme-ns.c b/hw/block/nvme-ns.c
index e4340bb675c9..0a03ca416450 100644
--- a/hw/block/nvme-ns.c
+++ b/hw/block/nvme-ns.c
@@ -36,13 +36,15 @@ static int nvme_ns_init(NvmeNamespace *ns, Error **errp)
 {
     BlockDriverInfo bdi;
     NvmeIdNs *id_ns = &ns->id_ns;
-    int lba_index = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas);
     int npdg, nlbas;
+    uint8_t ds;
+    uint16_t ms;
+    int i;
 
     ns->id_ns.dlfeat = 0x1;
 
-    id_ns->lbaf[lba_index].ds = 31 - clz32(ns->blkconf.logical_block_size);
-    id_ns->lbaf[lba_index].ms = ns->params.ms;
+    ds = 31 - clz32(ns->blkconf.logical_block_size);
+    ms = ns->params.ms;
 
     if (ns->params.ms) {
         id_ns->mc = 0x3;
@@ -53,8 +55,47 @@ static int nvme_ns_init(NvmeNamespace *ns, Error **errp)
 
         id_ns->dpc = 0x1f;
         id_ns->dps = (ns->params.pil << 3) | ns->params.pi;
+
+        NvmeLBAF lbaf[16] = {
+            [0] = { .ds =  9           },
+            [1] = { .ds =  9, .ms =  8 },
+            [2] = { .ds =  9, .ms = 16 },
+            [3] = { .ds =  9, .ms = 64 },
+            [4] = { .ds = 12           },
+            [5] = { .ds = 12, .ms =  8 },
+            [6] = { .ds = 12, .ms = 16 },
+            [7] = { .ds = 12, .ms = 64 },
+        };
+
+        memcpy(&id_ns->lbaf, &lbaf, sizeof(lbaf));
+        id_ns->nlbaf = 7;
+    } else {
+        NvmeLBAF lbaf[16] = {
+            [0] = { .ds =  9 },
+            [1] = { .ds = 12 },
+        };
+
+        memcpy(&id_ns->lbaf, &lbaf, sizeof(lbaf));
+        id_ns->nlbaf = 1;
     }
 
+    for (i = 0; i <= id_ns->nlbaf; i++) {
+        NvmeLBAF *lbaf = &id_ns->lbaf[i];
+        if (lbaf->ds == ds) {
+            if (lbaf->ms == ms) {
+                id_ns->flbas |= i;
+                goto lbaf_found;
+            }
+        }
+    }
+
+    /* add non-standard lba format */
+    id_ns->nlbaf++;
+    id_ns->lbaf[id_ns->nlbaf].ds = ds;
+    id_ns->lbaf[id_ns->nlbaf].ms = ms;
+    id_ns->flbas |= id_ns->nlbaf;
+
+lbaf_found:
     nlbas = nvme_ns_nlbas(ns);
 
     id_ns->nsze = cpu_to_le64(nlbas);
@@ -244,9 +285,10 @@ static void nvme_ns_zoned_init_state(NvmeNamespace *ns)
     }
 }
 
-static void nvme_ns_init_zoned(NvmeNamespace *ns, int lba_index)
+static void nvme_ns_init_zoned(NvmeNamespace *ns)
 {
     NvmeIdNsZoned *id_ns_z;
+    int i;
 
     nvme_ns_zoned_init_state(ns);
 
@@ -258,9 +300,11 @@ static void nvme_ns_init_zoned(NvmeNamespace *ns, int lba_index)
     id_ns_z->zoc = 0;
     id_ns_z->ozcs = ns->params.cross_zone_read ? 0x01 : 0x00;
 
-    id_ns_z->lbafe[lba_index].zsze = cpu_to_le64(ns->zone_size);
-    id_ns_z->lbafe[lba_index].zdes =
-        ns->params.zd_extension_size >> 6; /* Units of 64B */
+    for (i = 0; i <= ns->id_ns.nlbaf; i++) {
+        id_ns_z->lbafe[i].zsze = cpu_to_le64(ns->zone_size);
+        id_ns_z->lbafe[i].zdes =
+            ns->params.zd_extension_size >> 6; /* Units of 64B */
+    }
 
     ns->csi = NVME_CSI_ZONED;
     ns->id_ns.nsze = cpu_to_le64(ns->num_zones * ns->zone_size);
@@ -367,7 +411,7 @@ int nvme_ns_setup(NvmeNamespace *ns, Error **errp)
         if (nvme_ns_zoned_check_calc_geometry(ns, errp) != 0) {
             return -1;
         }
-        nvme_ns_init_zoned(ns, 0);
+        nvme_ns_init_zoned(ns);
     }
 
     return 0;
-- 
2.30.0