Merge remote-tracking branch 'remotes/stefanha-gitlab/tags/block-pull-request' into staging

Pull request

v2:
 * Removed clang-format call from scripts/block-coroutine-wrapper.py. This
   avoids the issue with clang version incompatibility. It could be added back
   in the future but the code is readable without reformatting and it also
   makes the build less dependent on the environment.

# gpg: Signature made Mon 05 Oct 2020 16:42:28 BST
# gpg:                using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [full]
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>" [full]
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35  775A 9CA4 ABB3 81AB 73C8

* remotes/stefanha-gitlab/tags/block-pull-request:
  util/vfio-helpers: Rework the IOVA allocator to avoid IOVA reserved regions
  util/vfio-helpers: Collect IOVA reserved regions
  docs: add 'io_uring' option to 'aio' param in qemu-options.hx
  include/block/block.h: drop non-ascii quotation mark
  block/io: refactor save/load vmstate
  block: drop bdrv_prwv
  block: generate coroutine-wrapper code
  scripts: add block-coroutine-wrapper.py
  block: declare some coroutine functions in block/coroutines.h
  block/io: refactor coroutine wrappers
  block: return error-code from bdrv_invalidate_cache
  block/nvme: Replace magic value by SCALE_MS definition
  block/nvme: Use register definitions from 'block/nvme.h'
  block/nvme: Drop NVMeRegs structure, directly use NvmeBar
  block/nvme: Reduce I/O registers scope
  block/nvme: Map doorbells pages write-only
  util/vfio-helpers: Pass page protections to qemu_vfio_pci_map_bar()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 26 insertions, 12 deletions

diff --git a/include/block/block.h b/include/block/block.h
index 981ab5b314..ce2ac39299 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -10,6 +10,16 @@
 #include "block/blockjob.h"
 #include "qemu/hbitmap.h"
 
+/*
+ * generated_co_wrapper
+ *
+ * Function specifier, which does nothing but mark functions to be
+ * generated by scripts/block-coroutine-wrapper.py
+ *
+ * Read more in docs/devel/block-coroutine-wrapper.rst
+ */
+#define generated_co_wrapper
+
 /* block.c */
 typedef struct BlockDriver BlockDriver;
 typedef struct BdrvChild BdrvChild;
@@ -294,7 +304,7 @@ enum BdrvChildRoleBits {
     BDRV_CHILD_FILTERED     = (1 << 2),
 
     /*
-     * Child from which to read all data that isn’t allocated in the
+     * Child from which to read all data that isn't allocated in the
      * parent (i.e., the backing child); such data is copied to the
      * parent through COW (and optionally COR).
      * This field is mutually exclusive with DATA, METADATA, and
@@ -373,9 +383,7 @@ int bdrv_pwrite_zeroes(BdrvChild *child, int64_t offset,
                        int bytes, BdrvRequestFlags flags);
 int bdrv_make_zero(BdrvChild *child, BdrvRequestFlags flags);
 int bdrv_pread(BdrvChild *child, int64_t offset, void *buf, int bytes);
-int bdrv_preadv(BdrvChild *child, int64_t offset, QEMUIOVector *qiov);
 int bdrv_pwrite(BdrvChild *child, int64_t offset, const void *buf, int bytes);
-int bdrv_pwritev(BdrvChild *child, int64_t offset, QEMUIOVector *qiov);
 int bdrv_pwrite_sync(BdrvChild *child, int64_t offset,
                      const void *buf, int count);
 /*
@@ -393,8 +401,9 @@ void bdrv_refresh_filename(BlockDriverState *bs);
 int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact,
                                   PreallocMode prealloc, BdrvRequestFlags flags,
                                   Error **errp);
-int bdrv_truncate(BdrvChild *child, int64_t offset, bool exact,
-                  PreallocMode prealloc, BdrvRequestFlags flags, Error **errp);
+int generated_co_wrapper
+bdrv_truncate(BdrvChild *child, int64_t offset, bool exact,
+              PreallocMode prealloc, BdrvRequestFlags flags, Error **errp);
 
 int64_t bdrv_nb_sectors(BlockDriverState *bs);
 int64_t bdrv_getlength(BlockDriverState *bs);
@@ -436,7 +445,8 @@ typedef enum {
     BDRV_FIX_ERRORS   = 2,
 } BdrvCheckMode;
 
-int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix);
+int generated_co_wrapper bdrv_check(BlockDriverState *bs, BdrvCheckResult *res,
+                                    BdrvCheckMode fix);
 
 /* The units of offset and total_work_size may be chosen arbitrarily by the
  * block driver; total_work_size may change during the course of the amendment
@@ -460,12 +470,13 @@ void bdrv_aio_cancel_async(BlockAIOCB *acb);
 int bdrv_co_ioctl(BlockDriverState *bs, int req, void *buf);
 
 /* Invalidate any cached metadata used by image formats */
-void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp);
+int generated_co_wrapper bdrv_invalidate_cache(BlockDriverState *bs,
+                                               Error **errp);
 void bdrv_invalidate_cache_all(Error **errp);
 int bdrv_inactivate_all(void);
 
 /* Ensure contents are flushed to disk.  */
-int bdrv_flush(BlockDriverState *bs);
+int generated_co_wrapper bdrv_flush(BlockDriverState *bs);
 int coroutine_fn bdrv_co_flush(BlockDriverState *bs);
 int bdrv_flush_all(void);
 void bdrv_close_all(void);
@@ -480,7 +491,8 @@ void bdrv_drain_all(void);
     AIO_WAIT_WHILE(bdrv_get_aio_context(bs_),              \
                    cond); })
 
-int bdrv_pdiscard(BdrvChild *child, int64_t offset, int64_t bytes);
+int generated_co_wrapper bdrv_pdiscard(BdrvChild *child, int64_t offset,
+                                       int64_t bytes);
 int bdrv_co_pdiscard(BdrvChild *child, int64_t offset, int64_t bytes);
 int bdrv_has_zero_init_1(BlockDriverState *bs);
 int bdrv_has_zero_init(BlockDriverState *bs);
@@ -560,8 +572,10 @@ int path_has_protocol(const char *path);
 int path_is_absolute(const char *path);
 char *path_combine(const char *base_path, const char *filename);
 
-int bdrv_readv_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
-int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
+int generated_co_wrapper
+bdrv_readv_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
+int generated_co_wrapper
+bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
 int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
                       int64_t pos, int size);
 
diff --git a/include/qemu/vfio-helpers.h b/include/qemu/vfio-helpers.h
index 1f057c2b9e..4491c8e1a6 100644
--- a/include/qemu/vfio-helpers.h
+++ b/include/qemu/vfio-helpers.h
@@ -22,7 +22,7 @@ int qemu_vfio_dma_map(QEMUVFIOState *s, void *host, size_t size,
 int qemu_vfio_dma_reset_temporary(QEMUVFIOState *s);
 void qemu_vfio_dma_unmap(QEMUVFIOState *s, void *host);
 void *qemu_vfio_pci_map_bar(QEMUVFIOState *s, int index,
-                            uint64_t offset, uint64_t size,
+                            uint64_t offset, uint64_t size, int prot,
                             Error **errp);
 void qemu_vfio_pci_unmap_bar(QEMUVFIOState *s, int index, void *bar,
                              uint64_t offset, uint64_t size);