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>
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@ -65,14 +65,22 @@
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static void nvme_process_sq(void *opaque);
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static bool nvme_addr_is_cmb(NvmeCtrl *n, hwaddr addr)
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{
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hwaddr low = n->ctrl_mem.addr;
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hwaddr hi = n->ctrl_mem.addr + int128_get64(n->ctrl_mem.size);
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return addr >= low && addr < hi;
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}
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static void nvme_addr_read(NvmeCtrl *n, hwaddr addr, void *buf, int size)
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{
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if (n->cmbsz && addr >= n->ctrl_mem.addr &&
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addr < (n->ctrl_mem.addr + int128_get64(n->ctrl_mem.size))) {
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if (n->cmbsz && nvme_addr_is_cmb(n, addr)) {
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memcpy(buf, (void *)&n->cmbuf[addr - n->ctrl_mem.addr], size);
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} else {
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pci_dma_read(&n->parent_obj, addr, buf, size);
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return;
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}
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pci_dma_read(&n->parent_obj, addr, buf, size);
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}
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static int nvme_check_sqid(NvmeCtrl *n, uint16_t sqid)
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