From ccdbeeb4171a532acc75ee2b78253aa24b3faa73 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
Date: Wed, 15 Dec 2021 23:29:52 +0100
Subject: [PATCH 13/25] dma: Let dma_buf_read() take MemTxAttrs argument
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Let devices specify transaction attributes when calling
dma_buf_read().

Keep the default MEMTXATTRS_UNSPECIFIED in the few callers.

Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211223115554.3155328-13-philmd@redhat.com>
---
 hw/ide/ahci.c         |  4 ++--
 hw/nvme/ctrl.c        |  2 +-
 hw/scsi/megasas.c     | 24 ++++++++++++------------
 hw/scsi/scsi-bus.c    |  2 +-
 include/sysemu/dma.h  |  2 +-
 softmmu/dma-helpers.c |  5 ++---
 6 files changed, 19 insertions(+), 20 deletions(-)

diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index 8e27fb8b35..1e482738de 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -1386,7 +1386,7 @@ static void ahci_pio_transfer(const IDEDMA *dma)
         if (is_write) {
             dma_buf_write(s->data_ptr, size, &s->sg, attrs);
         } else {
-            dma_buf_read(s->data_ptr, size, &s->sg);
+            dma_buf_read(s->data_ptr, size, &s->sg, attrs);
         }
     }
 
@@ -1481,7 +1481,7 @@ static int ahci_dma_rw_buf(const IDEDMA *dma, bool is_write)
     }
 
     if (is_write) {
-        dma_buf_read(p, l, &s->sg);
+        dma_buf_read(p, l, &s->sg, MEMTXATTRS_UNSPECIFIED);
     } else {
         dma_buf_write(p, l, &s->sg, MEMTXATTRS_UNSPECIFIED);
     }
diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index e1a531d5d6..462f79a1f6 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -1152,7 +1152,7 @@ static uint16_t nvme_tx(NvmeCtrl *n, NvmeSg *sg, uint8_t *ptr, uint32_t len,
         if (dir == NVME_TX_DIRECTION_TO_DEVICE) {
             residual = dma_buf_write(ptr, len, &sg->qsg, attrs);
         } else {
-            residual = dma_buf_read(ptr, len, &sg->qsg);
+            residual = dma_buf_read(ptr, len, &sg->qsg, attrs);
         }
 
         if (unlikely(residual)) {
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index 72376d92f6..f1c4d5782b 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -847,7 +847,7 @@ static int megasas_ctrl_get_info(MegasasState *s, MegasasCmd *cmd)
                                        MFI_INFO_PDMIX_SATA |
                                        MFI_INFO_PDMIX_LD);
 
-    cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg);
+    cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED);
     return MFI_STAT_OK;
 }
 
@@ -877,7 +877,7 @@ static int megasas_mfc_get_defaults(MegasasState *s, MegasasCmd *cmd)
     info.disable_preboot_cli = 1;
     info.cluster_disable = 1;
 
-    cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg);
+    cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED);
     return MFI_STAT_OK;
 }
 
@@ -898,7 +898,7 @@ static int megasas_dcmd_get_bios_info(MegasasState *s, MegasasCmd *cmd)
         info.expose_all_drives = 1;
     }
 
-    cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg);
+    cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED);
     return MFI_STAT_OK;
 }
 
@@ -909,7 +909,7 @@ static int megasas_dcmd_get_fw_time(MegasasState *s, MegasasCmd *cmd)
 
     fw_time = cpu_to_le64(megasas_fw_time());
 
-    cmd->iov_size -= dma_buf_read(&fw_time, dcmd_size, &cmd->qsg);
+    cmd->iov_size -= dma_buf_read(&fw_time, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED);
     return MFI_STAT_OK;
 }
 
@@ -936,7 +936,7 @@ static int megasas_event_info(MegasasState *s, MegasasCmd *cmd)
     info.shutdown_seq_num = cpu_to_le32(s->shutdown_event);
     info.boot_seq_num = cpu_to_le32(s->boot_event);
 
-    cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg);
+    cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED);
     return MFI_STAT_OK;
 }
 
@@ -1005,7 +1005,7 @@ static int megasas_dcmd_pd_get_list(MegasasState *s, MegasasCmd *cmd)
     info.size = cpu_to_le32(offset);
     info.count = cpu_to_le32(num_pd_disks);
 
-    cmd->iov_size -= dma_buf_read(&info, offset, &cmd->qsg);
+    cmd->iov_size -= dma_buf_read(&info, offset, &cmd->qsg, MEMTXATTRS_UNSPECIFIED);
     return MFI_STAT_OK;
 }
 
@@ -1099,7 +1099,7 @@ static int megasas_pd_get_info_submit(SCSIDevice *sdev, int lun,
     info->connected_port_bitmap = 0x1;
     info->device_speed = 1;
     info->link_speed = 1;
-    resid = dma_buf_read(cmd->iov_buf, dcmd_size, &cmd->qsg);
+    resid = dma_buf_read(cmd->iov_buf, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED);
     g_free(cmd->iov_buf);
     cmd->iov_size = dcmd_size - resid;
     cmd->iov_buf = NULL;
@@ -1171,7 +1171,7 @@ static int megasas_dcmd_ld_get_list(MegasasState *s, MegasasCmd *cmd)
     info.ld_count = cpu_to_le32(num_ld_disks);
     trace_megasas_dcmd_ld_get_list(cmd->index, num_ld_disks, max_ld_disks);
 
-    resid = dma_buf_read(&info, dcmd_size, &cmd->qsg);
+    resid = dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED);
     cmd->iov_size = dcmd_size - resid;
     return MFI_STAT_OK;
 }
@@ -1220,7 +1220,7 @@ static int megasas_dcmd_ld_list_query(MegasasState *s, MegasasCmd *cmd)
     info.size = dcmd_size;
     trace_megasas_dcmd_ld_get_list(cmd->index, num_ld_disks, max_ld_disks);
 
-    resid = dma_buf_read(&info, dcmd_size, &cmd->qsg);
+    resid = dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED);
     cmd->iov_size = dcmd_size - resid;
     return MFI_STAT_OK;
 }
@@ -1270,7 +1270,7 @@ static int megasas_ld_get_info_submit(SCSIDevice *sdev, int lun,
     info->ld_config.span[0].num_blocks = info->size;
     info->ld_config.span[0].array_ref = cpu_to_le16(sdev_id);
 
-    resid = dma_buf_read(cmd->iov_buf, dcmd_size, &cmd->qsg);
+    resid = dma_buf_read(cmd->iov_buf, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED);
     g_free(cmd->iov_buf);
     cmd->iov_size = dcmd_size - resid;
     cmd->iov_buf = NULL;
@@ -1389,7 +1389,7 @@ static int megasas_dcmd_cfg_read(MegasasState *s, MegasasCmd *cmd)
         ld_offset += sizeof(struct mfi_ld_config);
     }
 
-    cmd->iov_size -= dma_buf_read(data, info->size, &cmd->qsg);
+    cmd->iov_size -= dma_buf_read(data, info->size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED);
     return MFI_STAT_OK;
 }
 
@@ -1419,7 +1419,7 @@ static int megasas_dcmd_get_properties(MegasasState *s, MegasasCmd *cmd)
     info.ecc_bucket_leak_rate = cpu_to_le16(1440);
     info.expose_encl_devices = 1;
 
-    cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg);
+    cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED);
     return MFI_STAT_OK;
 }
 
diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index 6fe30327b1..2b613ad2b3 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -1428,7 +1428,7 @@ void scsi_req_data(SCSIRequest *req, int len)
 
     buf = scsi_req_get_buf(req);
     if (req->cmd.mode == SCSI_XFER_FROM_DEV) {
-        req->resid = dma_buf_read(buf, len, req->sg);
+        req->resid = dma_buf_read(buf, len, req->sg, MEMTXATTRS_UNSPECIFIED);
     } else {
         req->resid = dma_buf_write(buf, len, req->sg, MEMTXATTRS_UNSPECIFIED);
     }
diff --git a/include/sysemu/dma.h b/include/sysemu/dma.h
index e3dd74a9c4..fd8f16003d 100644
--- a/include/sysemu/dma.h
+++ b/include/sysemu/dma.h
@@ -302,7 +302,7 @@ BlockAIOCB *dma_blk_read(BlockBackend *blk,
 BlockAIOCB *dma_blk_write(BlockBackend *blk,
                           QEMUSGList *sg, uint64_t offset, uint32_t align,
                           BlockCompletionFunc *cb, void *opaque);
-uint64_t dma_buf_read(void *ptr, int32_t len, QEMUSGList *sg);
+uint64_t dma_buf_read(void *ptr, int32_t len, QEMUSGList *sg, MemTxAttrs attrs);
 uint64_t dma_buf_write(void *ptr, int32_t len, QEMUSGList *sg, MemTxAttrs attrs);
 
 void dma_acct_start(BlockBackend *blk, BlockAcctCookie *cookie,
diff --git a/softmmu/dma-helpers.c b/softmmu/dma-helpers.c
index 2f1a241b81..a391773c29 100644
--- a/softmmu/dma-helpers.c
+++ b/softmmu/dma-helpers.c
@@ -316,10 +316,9 @@ static uint64_t dma_buf_rw(void *buf, int32_t len, QEMUSGList *sg,
     return resid;
 }
 
-uint64_t dma_buf_read(void *ptr, int32_t len, QEMUSGList *sg)
+uint64_t dma_buf_read(void *ptr, int32_t len, QEMUSGList *sg, MemTxAttrs attrs)
 {
-    return dma_buf_rw(ptr, len, sg, DMA_DIRECTION_FROM_DEVICE,
-                      MEMTXATTRS_UNSPECIFIED);
+    return dma_buf_rw(ptr, len, sg, DMA_DIRECTION_FROM_DEVICE, attrs);
 }
 
 uint64_t dma_buf_write(void *ptr, int32_t len, QEMUSGList *sg, MemTxAttrs attrs)
-- 
2.27.0