qemu/hw-nvme-Change-alignment-in-dma-functions-for-nvme_b.patch

From f0ac211aab73b5b78795cd7bc94e0159c8e3cc1a Mon Sep 17 00:00:00 2001
From: wangmeiyang <wangmeiyang@xfusion.com>
Date: Fri, 26 May 2023 11:03:29 +0800
Subject: [PATCH] hw/nvme: Change alignment in dma functions for nvme_blk_*

Since the nvme_blk_read/write are used by both the data and metadata
portions of the IO, it can't have the 512B alignment requirement.
Without this change any metadata transfer, which length isn't a multiple
of 512B and which is bigger than 512B, will result in only a partial
transfer.

origin commit: https://gitlab.com/qemu-project/qemu/-/commit/9b4f01812f69ad6066725338c89945bb61f41823
Signed-off-by: Meiyang Wang <wangmeiyang@xfusion.com>
Signed-off-by: Mateusz Kozlowski <kozlowski.mateuszpl@gmail.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/nvme/ctrl.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index 40fbda3b03..282abdda91 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -1263,26 +1263,28 @@ uint16_t nvme_bounce_mdata(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
 }
 
 static inline void nvme_blk_read(BlockBackend *blk, int64_t offset,
-                                 BlockCompletionFunc *cb, NvmeRequest *req)
+                                 uint32_t align, BlockCompletionFunc *cb,
+                                 NvmeRequest *req)
 {
     assert(req->sg.flags & NVME_SG_ALLOC);
 
     if (req->sg.flags & NVME_SG_DMA) {
-        req->aiocb = dma_blk_read(blk, &req->sg.qsg, offset, BDRV_SECTOR_SIZE,
-                                  cb, req);
+        req->aiocb = dma_blk_read(blk, &req->sg.qsg, offset, align, cb, req);
     } else {
         req->aiocb = blk_aio_preadv(blk, offset, &req->sg.iov, 0, cb, req);
     }
 }
 
 static inline void nvme_blk_write(BlockBackend *blk, int64_t offset,
-                                  BlockCompletionFunc *cb, NvmeRequest *req)
+                                  uint32_t align, BlockCompletionFunc *cb,
+                                  NvmeRequest *req)
 {
     assert(req->sg.flags & NVME_SG_ALLOC);
 
     if (req->sg.flags & NVME_SG_DMA) {
         req->aiocb = dma_blk_write(blk, &req->sg.qsg, offset, BDRV_SECTOR_SIZE,
                                    cb, req);
+        req->aiocb = dma_blk_write(blk, &req->sg.qsg, offset, align, cb, req);
     } else {
         req->aiocb = blk_aio_pwritev(blk, offset, &req->sg.iov, 0, cb, req);
     }
@@ -1958,10 +1960,10 @@ static void nvme_rw_cb(void *opaque, int ret)
             }
 
             if (req->cmd.opcode == NVME_CMD_READ) {
-                return nvme_blk_read(blk, offset, nvme_rw_complete_cb, req);
+                 return nvme_blk_read(blk, offset, 1, nvme_rw_complete_cb, req);
             }
 
-            return nvme_blk_write(blk, offset, nvme_rw_complete_cb, req);
+            return nvme_blk_write(blk, offset, 1, nvme_rw_complete_cb, req);
         }
     }
 
@@ -3145,7 +3147,7 @@ static uint16_t nvme_read(NvmeCtrl *n, NvmeRequest *req)
 
     block_acct_start(blk_get_stats(blk), &req->acct, data_size,
                      BLOCK_ACCT_READ);
-    nvme_blk_read(blk, data_offset, nvme_rw_cb, req);
+    nvme_blk_read(blk, data_offset, BDRV_SECTOR_SIZE, nvme_rw_cb, req);
     return NVME_NO_COMPLETE;
 
 invalid:
@@ -3272,7 +3274,7 @@ static uint16_t nvme_do_write(NvmeCtrl *n, NvmeRequest *req, bool append,
 
         block_acct_start(blk_get_stats(blk), &req->acct, data_size,
                          BLOCK_ACCT_WRITE);
-        nvme_blk_write(blk, data_offset, nvme_rw_cb, req);
+        nvme_blk_write(blk, data_offset, BDRV_SECTOR_SIZE, nvme_rw_cb, req);
     } else {
         req->aiocb = blk_aio_pwrite_zeroes(blk, data_offset, data_size,
                                            BDRV_REQ_MAY_UNMAP, nvme_rw_cb,
-- 
2.41.0.windows.1