X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/e6416905c4afb34e61276cdc07c44813a3ebc5e7..270869139db617e29a35bb9ded41087bb702f9ac:/lunaix-os/kernel/block/block.c

diff --git a/lunaix-os/kernel/block/block.c b/lunaix-os/kernel/block/block.c
index 7f1b0dd..73fc9db 100644
--- a/lunaix-os/kernel/block/block.c
+++ b/lunaix-os/kernel/block/block.c
@@ -1,14 +1,18 @@
-#include <hal/ahci/hba.h>
-#include <klibc/stdio.h>
+#include <klibc/strfmt.h>
 #include <klibc/string.h>
-#include <lib/crc.h>
+
+#include <hal/ahci/hba.h>
+
+#include <klibc/crc.h>
+
+#include <lunaix/blkpart_gpt.h>
 #include <lunaix/block.h>
 #include <lunaix/fs/twifs.h>
 #include <lunaix/mm/cake.h>
+#include <lunaix/mm/pagetable.h>
 #include <lunaix/mm/valloc.h>
-#include <lunaix/syslog.h>
-
 #include <lunaix/spike.h>
+#include <lunaix/syslog.h>
 
 #define BLOCK_EREAD 1
 #define BLOCK_ESIG 2
@@ -22,6 +26,7 @@ LOG_MODULE("BLOCK")
 static struct cake_pile* lbd_pile;
 static struct block_dev** dev_registry;
 static struct twifs_node* blk_sysroot;
+static struct device_cat* blk_parent_dev;
 
 int free_slot = 0;
 
@@ -39,111 +44,226 @@ block_init()
     dev_registry = vcalloc(sizeof(struct block_dev*), MAX_DEV);
     free_slot = 0;
     blk_sysroot = twifs_dir_node(NULL, "block");
+    blk_parent_dev = device_addcat(NULL, "block");
+}
+
+static int
+__block_commit(struct blkio_context* blkio, struct blkio_req* req, int flags)
+{
+    int errno;
+    
+    blkio_bindctx(req, blkio);
+    blkio_mark_nfoc(req);
+    blkio_commit(req, flags);
+
+    if ((errno = req->errcode)) {
+        errno = -errno;
+    }
+
+    vbuf_free(req->vbuf);
+    blkio_free_req(req);
+    return errno;
 }
 
 int
 __block_read(struct device* dev, void* buf, size_t offset, size_t len)
 {
     int errno;
-    struct block_dev* bdev = (struct block_dev*)dev->underlay;
-    size_t bsize = bdev->blk_size, rd_block = offset / bsize,
+    struct block_dev* bdev = block_dev(dev);
+    size_t bsize = bdev->blk_size, 
+           rd_block = offset / bsize + bdev->start_lba,
            r = offset % bsize, rd_size = 0;
 
     if (!(len = MIN(len, ((size_t)bdev->end_lba - rd_block + 1) * bsize))) {
         return 0;
     }
 
-    struct vecbuf* vbuf = vbuf_alloc(NULL, buf, len);
+    struct vecbuf* vbuf = NULL;
     struct blkio_req* req;
-    void* tmp_buf = NULL;
+    void *head_buf = NULL, *tail_buf = NULL;
 
-    if (r) {
-        tmp_buf = vzalloc(bsize);
+    // align the boundary
+    if (r || len < bsize) {
+        head_buf = valloc(bsize);
         rd_size = MIN(len, bsize - r);
-        vbuf->buf.size = rd_size;
-        vbuf->buf.buffer = tmp_buf;
+        vbuf_alloc(&vbuf, head_buf, bsize);
+    }
 
-        vbuf_alloc(vbuf, buf + rd_size, len - rd_size);
+    // align the length
+    if ((len - rd_size)) {
+        size_t llen = len - rd_size;
+        assert_msg(!(llen % bsize), "misalign block read");
+        vbuf_alloc(&vbuf, buf + rd_size, llen);
     }
 
     req = blkio_vrd(vbuf, rd_block, NULL, NULL, 0);
-    blkio_commit(bdev->blkio, req);
-
-    pwait(&req->wait);
 
-    if (!(errno = req->errcode)) {
-        memcpy(buf, tmp_buf + r, rd_size);
+    if (!(errno = __block_commit(bdev->blkio, req, BLKIO_WAIT))) {
+        memcpy(buf, head_buf + r, rd_size);
         errno = len;
-    } else {
-        errno = -errno;
     }
 
-    if (tmp_buf) {
-        vfree(tmp_buf);
+    if (head_buf) {
+        vfree(head_buf);
     }
 
-    blkio_free_req(req);
-    vbuf_free(vbuf);
     return errno;
 }
 
 int
 __block_write(struct device* dev, void* buf, size_t offset, size_t len)
 {
-    struct block_dev* bdev = (struct block_dev*)dev->underlay;
-    size_t bsize = bdev->blk_size, rd_block = offset / bsize,
-           r = offset % bsize;
+    struct block_dev* bdev = block_dev(dev);
+    size_t bsize = bdev->blk_size, wr_block = offset / bsize + bdev->start_lba,
+           r = offset % bsize, wr_size = 0;
 
-    if (!(len = MIN(len, ((size_t)bdev->end_lba - rd_block + 1) * bsize))) {
+    if (!(len = MIN(len, ((size_t)bdev->end_lba - wr_block + 1) * bsize))) {
         return 0;
     }
 
-    struct vecbuf* vbuf = vbuf_alloc(NULL, buf, len);
+    struct vecbuf* vbuf = NULL;
     struct blkio_req* req;
     void* tmp_buf = NULL;
 
     if (r) {
-        size_t rd_size = MIN(len, bsize - r);
+        size_t wr_size = MIN(len, bsize - r);
         tmp_buf = vzalloc(bsize);
-        vbuf->buf.size = bsize;
-        vbuf->buf.buffer = tmp_buf;
+        vbuf_alloc(&vbuf, tmp_buf, bsize);
 
-        memcpy(tmp_buf + r, buf, rd_size);
-        vbuf_alloc(vbuf, buf + rd_size, len - rd_size);
+        memcpy(tmp_buf + r, buf, wr_size);
     }
 
-    req = blkio_vwr(vbuf, rd_block, NULL, NULL, 0);
-    blkio_commit(bdev->blkio, req);
+    if ((len - wr_size)) {
+        size_t llen = len - wr_size;
+        assert_msg(!(llen % bsize), "misalign block write");
+        vbuf_alloc(&vbuf, buf + wr_size, llen);
+    }
 
-    pwait(&req->wait);
+    req = blkio_vwr(vbuf, wr_block, NULL, NULL, 0);
 
-    int errno = req->errcode;
-    if (!errno) {
+    int errno;
+    if (!(errno = __block_commit(bdev->blkio, req, BLKIO_WAIT))) {
         errno = len;
-    } else {
-        errno = -errno;
     }
 
     if (tmp_buf) {
         vfree(tmp_buf);
     }
 
-    blkio_free_req(req);
-    vbuf_free(vbuf);
     return errno;
 }
 
+int
+__block_read_page(struct device* dev, void* buf, size_t offset)
+{
+    struct vecbuf* vbuf = NULL;
+    struct block_dev* bdev = block_dev(dev);
+
+    u32_t lba = offset / bdev->blk_size + bdev->start_lba;
+    u32_t rd_lba = MIN(lba + PAGE_SIZE / bdev->blk_size, bdev->end_lba);
+
+    if (rd_lba <= lba) {
+        return 0;
+    }
+
+    rd_lba -= lba;
+
+    vbuf_alloc(&vbuf, buf, rd_lba * bdev->blk_size);
+
+    struct blkio_req* req = blkio_vrd(vbuf, lba, NULL, NULL, 0);
+
+    int errno;
+    if (!(errno = __block_commit(bdev->blkio, req, BLKIO_WAIT))) {
+        errno = rd_lba * bdev->blk_size;
+    }
+
+    return errno;
+}
+
+int
+__block_write_page(struct device* dev, void* buf, size_t offset)
+{
+    struct vecbuf* vbuf = NULL;
+    struct block_dev* bdev = block_dev(dev);
+
+    u32_t lba = offset / bdev->blk_size + bdev->start_lba;
+    u32_t wr_lba = MIN(lba + PAGE_SIZE / bdev->blk_size, bdev->end_lba);
+
+    if (wr_lba <= lba) {
+        return 0;
+    }
+
+    wr_lba -= lba;
+
+    vbuf_alloc(&vbuf, buf, wr_lba * bdev->blk_size);
+
+    struct blkio_req* req = blkio_vwr(vbuf, lba, NULL, NULL, 0);
+
+    int errno;
+    if (!(errno = __block_commit(bdev->blkio, req, BLKIO_WAIT))) {
+        errno = wr_lba * bdev->blk_size;
+    }
+
+    return errno;
+}
+
+int
+__block_rd_lb(struct block_dev* bdev, void* buf, u64_t start, size_t count)
+{
+    struct vecbuf* vbuf = NULL;
+    vbuf_alloc(&vbuf, buf, bdev->blk_size * count);
+
+    struct blkio_req* req = blkio_vrd(vbuf, start, NULL, NULL, 0);
+
+    int errno;
+    if (!(errno = __block_commit(bdev->blkio, req, BLKIO_WAIT))) {
+        errno = count;
+    }
+
+    return errno;
+}
+
+int
+__block_wr_lb(struct block_dev* bdev, void* buf, u64_t start, size_t count)
+{
+    struct vecbuf* vbuf = NULL;
+    vbuf_alloc(&vbuf, buf, bdev->blk_size * count);
+
+    struct blkio_req* req = blkio_vwr(vbuf, start, NULL, NULL, 0);
+
+    int errno;
+    if (!(errno = __block_commit(bdev->blkio, req, BLKIO_WAIT))) {
+        errno = count;
+    }
+
+    return errno;
+}
+
+void*
+block_alloc_buf(struct block_dev* bdev)
+{
+    return valloc(bdev->blk_size);
+}
+
+void
+block_free_buf(struct block_dev* bdev, void* buf)
+{
+    return vfree(buf);
+}
+
 struct block_dev*
 block_alloc_dev(const char* blk_id, void* driver, req_handler ioreq_handler)
 {
     struct block_dev* bdev = cake_grab(lbd_pile);
     memset(bdev, 0, sizeof(struct block_dev));
-
+    llist_init_head(&bdev->parts);
     strncpy(bdev->name, blk_id, PARTITION_NAME_SIZE);
 
     bdev->blkio = blkio_newctx(ioreq_handler);
     bdev->driver = driver;
     bdev->blkio->driver = driver;
+    bdev->ops = (struct block_dev_ops){ .block_read = __block_rd_lb,
+                                        .block_write = __block_wr_lb };
 
     return bdev;
 }
@@ -158,6 +278,13 @@ block_mount(struct block_dev* bdev, devfs_exporter fs_export)
         goto error;
     }
 
+    errno = blkpart_probegpt(bdev->dev);
+    if (errno < 0) {
+        ERROR("Fail to parse partition table (%d)", errno);
+    } else if (!errno) {
+        // TODO try other PT parser...
+    }
+
     struct twifs_node* dev_root = twifs_dir_node(blk_sysroot, bdev->bdev_id);
     blk_set_blkmapping(bdev, dev_root);
     fs_export(bdev, dev_root);
@@ -165,7 +292,7 @@ block_mount(struct block_dev* bdev, devfs_exporter fs_export)
     return errno;
 
 error:
-    kprintf(KERROR "Fail to mount block device: %s (%x)\n", bdev->name, -errno);
+    ERROR("Fail to mount block device: %s (%x)", bdev->name, -errno);
     return errno;
 }
 
@@ -176,12 +303,50 @@ __block_register(struct block_dev* bdev)
         return 0;
     }
 
-    struct device* dev = device_addvol(NULL, bdev, "sd%c", 'a' + free_slot);
-    dev->write = __block_write;
-    dev->read = __block_read;
+    struct device* dev = device_allocvol(dev_meta(blk_parent_dev), bdev);
+    dev->ops.write = __block_write;
+    dev->ops.write_page = __block_write_page;
+    dev->ops.read = __block_read;
+    dev->ops.read_page = __block_read_page;
 
     bdev->dev = dev;
-    strcpy(bdev->bdev_id, dev->name_val);
+
+    register_device(dev, bdev->class, "sd%c", 'a' + free_slot);
     dev_registry[free_slot++] = bdev;
+
+    strcpy(bdev->bdev_id, dev->name_val);
+
     return 1;
+}
+
+struct block_dev*
+blk_mount_part(struct block_dev* bdev,
+               const char* name,
+               size_t index,
+               u64_t start_lba,
+               u64_t end_lba)
+{
+    struct block_dev* pbdev = cake_grab(lbd_pile);
+    memcpy(pbdev, bdev, sizeof(*bdev));
+
+    struct device* dev = device_allocvol(NULL, pbdev);
+    dev->ops.write = __block_write;
+    dev->ops.write_page = __block_write_page;
+    dev->ops.read = __block_read;
+    dev->ops.read_page = __block_read_page;
+
+    pbdev->start_lba = start_lba;
+    pbdev->end_lba = end_lba;
+    pbdev->dev = dev;
+
+    strcpy(pbdev->bdev_id, dev->name_val);
+    if (name) {
+        strncpy(pbdev->name, name, PARTITION_NAME_SIZE);
+    }
+
+    llist_append(&bdev->parts, &pbdev->parts);
+
+    register_device(dev, pbdev->class, "%sp%d", bdev->bdev_id, index + 1);
+
+    return pbdev;
 }
\ No newline at end of file