[src/trunk]: src/sys/dev/pci The virtio block device capacity config item is ...

[jakllsch <jakllsch%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/0109fc679e70
branches:  trunk
changeset: 833092:0109fc679e70
user:      jakllsch <jakllsch%NetBSD.org@localhost>
date:      Sun Jun 10 14:43:07 2018 +0000

description:
The virtio block device capacity config item is expressed always in
request protocol sector units of 512 bytes.

Also, add and use a symbolic constant to refer to request protocol
sector units.

diffstat:

 sys/dev/pci/ld_virtio.c |  19 ++++++++++++-------
 1 files changed, 12 insertions(+), 7 deletions(-)

diffs (75 lines):

diff -r cf9db3084dc7 -r 0109fc679e70 sys/dev/pci/ld_virtio.c
--- a/sys/dev/pci/ld_virtio.c   Sun Jun 10 13:26:29 2018 +0000
+++ b/sys/dev/pci/ld_virtio.c   Sun Jun 10 14:43:07 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ld_virtio.c,v 1.20 2018/06/07 23:32:30 jakllsch Exp $  */
+/*     $NetBSD: ld_virtio.c,v 1.21 2018/06/10 14:43:07 jakllsch Exp $  */
 
 /*
  * Copyright (c) 2010 Minoura Makoto.
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ld_virtio.c,v 1.20 2018/06/07 23:32:30 jakllsch Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ld_virtio.c,v 1.21 2018/06/10 14:43:07 jakllsch Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -99,6 +99,9 @@
 #define VIRTIO_BLK_T_FLUSH     4
 #define VIRTIO_BLK_T_BARRIER   0x80000000
 
+/* Sector */
+#define VIRTIO_BLK_BSIZE       512
+
 /* Status */
 #define VIRTIO_BLK_S_OK                0
 #define VIRTIO_BLK_S_IOERR     1
@@ -110,7 +113,7 @@
        uint32_t        ioprio;
        uint64_t        sector;
 } __packed;
-/* 512*virtio_blk_req_hdr.sector byte payload and 1 byte status follows */
+/* payload and 1 byte status follows */
 
 
 /*
@@ -294,7 +297,7 @@
                ld->sc_secsize = virtio_read_device_config_4(vsc,
                                        VIRTIO_BLK_CONFIG_BLK_SIZE);
        } else
-               ld->sc_secsize = 512;
+               ld->sc_secsize = VIRTIO_BLK_BSIZE;
 
        /* At least genfs_io assumes maxxfer == MAXPHYS. */
        if (features & VIRTIO_BLK_F_SIZE_MAX) {
@@ -344,7 +347,7 @@
 
        ld->sc_dv = self;
        ld->sc_secperunit = virtio_read_device_config_8(vsc,
-                               VIRTIO_BLK_CONFIG_CAPACITY);
+           VIRTIO_BLK_CONFIG_CAPACITY) / (ld->sc_secsize / VIRTIO_BLK_BSIZE);
        ld->sc_maxxfer = maxxfersize;
        if (features & VIRTIO_BLK_F_GEOMETRY) {
                ld->sc_ncylinders = virtio_read_device_config_2(vsc,
@@ -420,7 +423,8 @@
        vr->vr_bp = bp;
        vr->vr_hdr.type = isread?VIRTIO_BLK_T_IN:VIRTIO_BLK_T_OUT;
        vr->vr_hdr.ioprio = 0;
-       vr->vr_hdr.sector = bp->b_rawblkno * sc->sc_ld.sc_secsize / 512;
+       vr->vr_hdr.sector = bp->b_rawblkno * sc->sc_ld.sc_secsize /
+           VIRTIO_BLK_BSIZE;
 
        bus_dmamap_sync(virtio_dmat(vsc), vr->vr_cmdsts,
                        0, sizeof(struct virtio_blk_req_hdr),
@@ -546,7 +550,8 @@
        vr->vr_bp = (void*)0xdeadbeef;
        vr->vr_hdr.type = VIRTIO_BLK_T_OUT;
        vr->vr_hdr.ioprio = 0;
-       vr->vr_hdr.sector = (daddr_t) blkno * ld->sc_secsize / 512;
+       vr->vr_hdr.sector = (daddr_t) blkno * ld->sc_secsize /
+           VIRTIO_BLK_BSIZE;
 
        bus_dmamap_sync(virtio_dmat(vsc), vr->vr_cmdsts,
                        0, sizeof(struct virtio_blk_req_hdr),