From: Klaus Jensen <k.jen...@samsung.com>
Add 'mdts' device parameter to control the Maximum Data Transfer Size of
the controller and check that it is respected.
Signed-off-by: Klaus Jensen <k.jen...@samsung.com>
Reviewed-by: Maxim Levitsky <mlevi...@redhat.com>
Reviewed-by: Minwoo Im <minwoo.im....@gmail.com>
---
hw/block/nvme.c | 30 +++++++++++++++++++++++++++++-
hw/block/nvme.h | 1 +
hw/block/trace-events | 1 +
3 files changed, 31 insertions(+), 1 deletion(-)
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index c35b35ed41c4..60034ea62ca8 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -20,7 +20,8 @@
* -device nvme,drive=<drive_id>,serial=<serial>,id=<id[optional]>, \
* cmb_size_mb=<cmb_size_mb[optional]>, \
* [pmrdev=<mem_backend_file_id>,] \
- * max_ioqpairs=<N[optional]>
+ * max_ioqpairs=<N[optional]>, \
+ * mdts=<N[optional]>
*
* Note cmb_size_mb denotes size of CMB in MB. CMB is assumed to be at
* offset 0 in BAR2 and supports only WDS, RDS and SQS for now.
@@ -555,6 +556,17 @@ static void nvme_clear_events(NvmeCtrl *n, uint8_t
event_type)
}
}
+static inline uint16_t nvme_check_mdts(NvmeCtrl *n, size_t len)
+{
+ uint8_t mdts = n->params.mdts;
+
+ if (mdts && len > n->page_size << mdts) {
+ return NVME_INVALID_FIELD | NVME_DNR;
+ }
+
+ return NVME_SUCCESS;
+}
+
static inline uint16_t nvme_check_bounds(NvmeCtrl *n, NvmeNamespace *ns,
uint64_t slba, uint32_t nlb)
{
@@ -648,6 +660,13 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns,
NvmeCmd *cmd,
trace_pci_nvme_rw(is_write ? "write" : "read", nlb, data_size, slba);
+ status = nvme_check_mdts(n, data_size);
+ if (status) {
+ trace_pci_nvme_err_mdts(nvme_cid(req), data_size);
+ block_acct_invalid(blk_get_stats(n->conf.blk), acct);
+ return status;
+ }
+
status = nvme_check_bounds(n, ns, slba, nlb);
if (status) {
trace_pci_nvme_err_invalid_lba_range(slba, nlb, ns->id_ns.nsze);
@@ -941,6 +960,7 @@ static uint16_t nvme_get_log(NvmeCtrl *n, NvmeCmd *cmd,
NvmeRequest *req)
uint32_t numdl, numdu;
uint64_t off, lpol, lpou;
size_t len;
+ uint16_t status;
numdl = (dw10 >> 16);
numdu = (dw11 & 0xffff);
@@ -956,6 +976,12 @@ static uint16_t nvme_get_log(NvmeCtrl *n, NvmeCmd *cmd,
NvmeRequest *req)
trace_pci_nvme_get_log(nvme_cid(req), lid, lsp, rae, len, off);
+ status = nvme_check_mdts(n, len);
+ if (status) {
+ trace_pci_nvme_err_mdts(nvme_cid(req), len);
+ return status;
+ }
+
switch (lid) {
case NVME_LOG_ERROR_INFO:
return nvme_error_info(n, cmd, rae, len, off, req);
@@ -2284,6 +2310,7 @@ static void nvme_init_ctrl(NvmeCtrl *n, PCIDevice
*pci_dev)
id->ieee[0] = 0x00;
id->ieee[1] = 0x02;
id->ieee[2] = 0xb3;
+ id->mdts = n->params.mdts;
id->ver = cpu_to_le32(NVME_SPEC_VER);
id->oacs = cpu_to_le16(0);
@@ -2403,6 +2430,7 @@ static Property nvme_props[] = {
DEFINE_PROP_UINT16("msix_qsize", NvmeCtrl, params.msix_qsize, 65),
DEFINE_PROP_UINT8("aerl", NvmeCtrl, params.aerl, 3),
DEFINE_PROP_UINT32("aer_max_queued", NvmeCtrl, params.aer_max_queued, 64),
+ DEFINE_PROP_UINT8("mdts", NvmeCtrl, params.mdts, 7),
DEFINE_PROP_END_OF_LIST(),
};
diff --git a/hw/block/nvme.h b/hw/block/nvme.h
index 5519b5cc7686..137cd8c2bf20 100644
--- a/hw/block/nvme.h
+++ b/hw/block/nvme.h
@@ -11,6 +11,7 @@ typedef struct NvmeParams {
uint32_t cmb_size_mb;
uint8_t aerl;
uint32_t aer_max_queued;
+ uint8_t mdts;
} NvmeParams;
typedef struct NvmeAsyncEvent {
diff --git a/hw/block/trace-events b/hw/block/trace-events
index f20c59a4b542..82c123230780 100644
--- a/hw/block/trace-events
+++ b/hw/block/trace-events
@@ -85,6 +85,7 @@ pci_nvme_mmio_shutdown_set(void) "shutdown bit set"
pci_nvme_mmio_shutdown_cleared(void) "shutdown bit cleared"
# nvme traces for error conditions
+pci_nvme_err_mdts(uint16_t cid, size_t len) "cid %"PRIu16" len %"PRIu64""
pci_nvme_err_invalid_dma(void) "PRP/SGL is too small for transfer size"
pci_nvme_err_invalid_prplist_ent(uint64_t prplist) "PRP list entry is null or
not page aligned: 0x%"PRIx64""
pci_nvme_err_invalid_prp2_align(uint64_t prp2) "PRP2 is not page aligned:
0x%"PRIx64""
--
2.27.0
