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hw/block/nvme: refactor nvme_addr_read 

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>
This commit is contained in:
Klaus Jensen 2020-06-09 21:03:17 +02:00 committed by Kevin Wolf
parent 3e829fd438
commit b4529c5c3a
1 changed files with 12 additions and 4 deletions
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16
hw/block/nvme.c
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@ -65,14 +65,22 @@
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)