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From 55428706d5b0b8889b8e009eac77137bb556a4f0 Mon Sep 17 00:00:00 2001
From: Klaus Jensen <k.jensen@samsung.com>
Date: Tue, 9 Jun 2020 21:03:17 +0200
Subject: [PATCH 1/2] hw/block/nvme: refactor nvme_addr_read
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Pull the controller memory buffer check to its own function. The check
will be used on its own in later patches.
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Message-Id: <20200609190333.59390-7-its@irrelevant.dk>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
hw/block/nvme.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 12d8254..e6f24a6 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -52,14 +52,22 @@
static void nvme_process_sq(void *opaque);
+static bool nvme_addr_is_cmb(NvmeCtrl *n, hwaddr addr)
+{
+ hwaddr low = n->ctrl_mem.addr;
+ hwaddr hi = n->ctrl_mem.addr + int128_get64(n->ctrl_mem.size);
+
+ return addr >= low && addr < hi;
+}
+
static void nvme_addr_read(NvmeCtrl *n, hwaddr addr, void *buf, int size)
{
- if (n->cmbsz && addr >= n->ctrl_mem.addr &&
- addr < (n->ctrl_mem.addr + int128_get64(n->ctrl_mem.size))) {
+ if (n->cmbsz && nvme_addr_is_cmb(n, addr)) {
memcpy(buf, (void *)&n->cmbuf[addr - n->ctrl_mem.addr], size);
- } else {
- pci_dma_read(&n->parent_obj, addr, buf, size);
+ return;
}
+
+ pci_dma_read(&n->parent_obj, addr, buf, size);
}
static int nvme_check_sqid(NvmeCtrl *n, uint16_t sqid)
--
1.8.3.1
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