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hw/nvme: Add support for Secondary Controller List

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Introduce handling for Secondary Controller List (Identify command with
CNS value of 15h).

Secondary controller ids are unique in the subsystem, hence they are
reserved by it upon initialization of the primary controller to the
number of sriov_max_vfs.

ID reservation requires the addition of an intermediate controller slot
state, so the reserved controller has the address 0xFFFF.
A secondary controller is in the reserved state when it has no virtual
function assigned, but its primary controller is realized.
Secondary controller reservations are released to NULL when its primary
controller is unregistered.

Signed-off-by: Lukasz Maniak <lukasz.maniak@linux.intel.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
This commit is contained in:
Lukasz Maniak 2022-05-09 16:16:11 +02:00 committed by Klaus Jensen
parent 5e6f963f01
commit 99f48ae7ae
6 changed files with 141 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
hw/nvme/ctrl.c
View File

@ -4812,6 +4812,29 @@ static uint16_t nvme_identify_pri_ctrl_cap(NvmeCtrl *n, NvmeRequest *req)
sizeof(NvmePriCtrlCap), req);
}
static uint16_t nvme_identify_sec_ctrl_list(NvmeCtrl *n, NvmeRequest *req)
{
NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
uint16_t pri_ctrl_id = le16_to_cpu(n->pri_ctrl_cap.cntlid);
uint16_t min_id = le16_to_cpu(c->ctrlid);
uint8_t num_sec_ctrl = n->sec_ctrl_list.numcntl;
NvmeSecCtrlList list = {0};
uint8_t i;
for (i = 0; i < num_sec_ctrl; i++) {
if (n->sec_ctrl_list.sec[i].scid >= min_id) {
list.numcntl = num_sec_ctrl - i;
memcpy(&list.sec, n->sec_ctrl_list.sec + i,
list.numcntl * sizeof(NvmeSecCtrlEntry));
break;
}
}
trace_pci_nvme_identify_sec_ctrl_list(pri_ctrl_id, list.numcntl);
return nvme_c2h(n, (uint8_t *)&list, sizeof(list), req);
}
static uint16_t nvme_identify_ns_csi(NvmeCtrl *n, NvmeRequest *req,
bool active)
{
@ -5030,6 +5053,8 @@ static uint16_t nvme_identify(NvmeCtrl *n, NvmeRequest *req)
return nvme_identify_ctrl_list(n, req, false);
case NVME_ID_CNS_PRIMARY_CTRL_CAP:
return nvme_identify_pri_ctrl_cap(n, req);
case NVME_ID_CNS_SECONDARY_CTRL_LIST:
return nvme_identify_sec_ctrl_list(n, req);
case NVME_ID_CNS_CS_NS:
return nvme_identify_ns_csi(n, req, true);
case NVME_ID_CNS_CS_NS_PRESENT:
@ -6622,6 +6647,9 @@ static void nvme_check_constraints(NvmeCtrl *n, Error **errp)
static void nvme_init_state(NvmeCtrl *n)
{
NvmePriCtrlCap *cap = &n->pri_ctrl_cap;
NvmeSecCtrlList *list = &n->sec_ctrl_list;
NvmeSecCtrlEntry *sctrl;
int i;
/* add one to max_ioqpairs to account for the admin queue pair */
n->reg_size = pow2ceil(sizeof(NvmeBar) +
@ -6633,6 +6661,13 @@ static void nvme_init_state(NvmeCtrl *n)
n->starttime_ms = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
n->aer_reqs = g_new0(NvmeRequest *, n->params.aerl + 1);
list->numcntl = cpu_to_le16(n->params.sriov_max_vfs);
for (i = 0; i < n->params.sriov_max_vfs; i++) {
sctrl = &list->sec[i];
sctrl->pcid = cpu_to_le16(n->cntlid);
sctrl->vfn = cpu_to_le16(i + 1);
}
cap->cntlid = cpu_to_le16(n->cntlid);
}

2
hw/nvme/ns.c
View File

@ -597,7 +597,7 @@ static void nvme_ns_realize(DeviceState *dev, Error **errp)
for (i = 0; i < ARRAY_SIZE(subsys->ctrls); i++) {
NvmeCtrl *ctrl = subsys->ctrls[i];
if (ctrl) {
if (ctrl && ctrl != SUBSYS_SLOT_RSVD) {
nvme_attach_ns(ctrl, ns);
}
}

18
hw/nvme/nvme.h
View File

@ -43,6 +43,7 @@ typedef struct NvmeBus {
#define TYPE_NVME_SUBSYS "nvme-subsys"
#define NVME_SUBSYS(obj) \
OBJECT_CHECK(NvmeSubsystem, (obj), TYPE_NVME_SUBSYS)
#define SUBSYS_SLOT_RSVD (void *)0xFFFF
typedef struct NvmeSubsystem {
DeviceState parent_obj;
@ -68,6 +69,10 @@ static inline NvmeCtrl *nvme_subsys_ctrl(NvmeSubsystem *subsys,
return NULL;
}
if (subsys->ctrls[cntlid] == SUBSYS_SLOT_RSVD) {
return NULL;
}
return subsys->ctrls[cntlid];
}
@ -480,6 +485,7 @@ typedef struct NvmeCtrl {
} features;
NvmePriCtrlCap pri_ctrl_cap;
NvmeSecCtrlList sec_ctrl_list;
} NvmeCtrl;
static inline NvmeNamespace *nvme_ns(NvmeCtrl *n, uint32_t nsid)
@ -514,6 +520,18 @@ static inline uint16_t nvme_cid(NvmeRequest *req)
return le16_to_cpu(req->cqe.cid);
}
static inline NvmeSecCtrlEntry *nvme_sctrl(NvmeCtrl *n)
{
PCIDevice *pci_dev = &n->parent_obj;
NvmeCtrl *pf = NVME(pcie_sriov_get_pf(pci_dev));
if (pci_is_vf(pci_dev)) {
return &pf->sec_ctrl_list.sec[pcie_sriov_vf_number(pci_dev)];
}
return NULL;
}
void nvme_attach_ns(NvmeCtrl *n, NvmeNamespace *ns);
uint16_t nvme_bounce_data(NvmeCtrl *n, void *ptr, uint32_t len,
NvmeTxDirection dir, NvmeRequest *req);

75
hw/nvme/subsys.c
View File

@ -11,20 +11,71 @@
#include "nvme.h"
int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp)
static int nvme_subsys_reserve_cntlids(NvmeCtrl *n, int start, int num)
{
NvmeSubsystem *subsys = n->subsys;
int cntlid, nsid;
NvmeSecCtrlList *list = &n->sec_ctrl_list;
NvmeSecCtrlEntry *sctrl;
int i, cnt = 0;
for (cntlid = 0; cntlid < ARRAY_SIZE(subsys->ctrls); cntlid++) {
if (!subsys->ctrls[cntlid]) {
break;
for (i = start; i < ARRAY_SIZE(subsys->ctrls) && cnt < num; i++) {
if (!subsys->ctrls[i]) {
sctrl = &list->sec[cnt];
sctrl->scid = cpu_to_le16(i);
subsys->ctrls[i] = SUBSYS_SLOT_RSVD;
cnt++;
}
}
if (cntlid == ARRAY_SIZE(subsys->ctrls)) {
error_setg(errp, "no more free controller id");
return -1;
return cnt;
}
static void nvme_subsys_unreserve_cntlids(NvmeCtrl *n)
{
NvmeSubsystem *subsys = n->subsys;
NvmeSecCtrlList *list = &n->sec_ctrl_list;
NvmeSecCtrlEntry *sctrl;
int i, cntlid;
for (i = 0; i < n->params.sriov_max_vfs; i++) {
sctrl = &list->sec[i];
cntlid = le16_to_cpu(sctrl->scid);
if (cntlid) {
assert(subsys->ctrls[cntlid] == SUBSYS_SLOT_RSVD);
subsys->ctrls[cntlid] = NULL;
sctrl->scid = 0;
}
}
}
int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp)
{
NvmeSubsystem *subsys = n->subsys;
NvmeSecCtrlEntry *sctrl = nvme_sctrl(n);
int cntlid, nsid, num_rsvd, num_vfs = n->params.sriov_max_vfs;
if (pci_is_vf(&n->parent_obj)) {
cntlid = le16_to_cpu(sctrl->scid);
} else {
for (cntlid = 0; cntlid < ARRAY_SIZE(subsys->ctrls); cntlid++) {
if (!subsys->ctrls[cntlid]) {
break;
}
}
if (cntlid == ARRAY_SIZE(subsys->ctrls)) {
error_setg(errp, "no more free controller id");
return -1;
}
num_rsvd = nvme_subsys_reserve_cntlids(n, cntlid + 1, num_vfs);
if (num_rsvd != num_vfs) {
nvme_subsys_unreserve_cntlids(n);
error_setg(errp,
"no more free controller ids for secondary controllers");
return -1;
}
}
if (!subsys->serial) {
@ -48,7 +99,13 @@ int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp)
void nvme_subsys_unregister_ctrl(NvmeSubsystem *subsys, NvmeCtrl *n)
{
subsys->ctrls[n->cntlid] = NULL;
if (pci_is_vf(&n->parent_obj)) {
subsys->ctrls[n->cntlid] = SUBSYS_SLOT_RSVD;
} else {
subsys->ctrls[n->cntlid] = NULL;
nvme_subsys_unreserve_cntlids(n);
}
n->cntlid = -1;
}

1
hw/nvme/trace-events
View File

@ -57,6 +57,7 @@ pci_nvme_identify_ctrl_csi(uint8_t csi) "identify controller, csi=0x%"PRIx8""
pci_nvme_identify_ns(uint32_t ns) "nsid %"PRIu32""
pci_nvme_identify_ctrl_list(uint8_t cns, uint16_t cntid) "cns 0x%"PRIx8" cntid %"PRIu16""
pci_nvme_identify_pri_ctrl_cap(uint16_t cntlid) "identify primary controller capabilities cntlid=%"PRIu16""
pci_nvme_identify_sec_ctrl_list(uint16_t cntlid, uint8_t numcntl) "identify secondary controller list cntlid=%"PRIu16" numcntl=%"PRIu8""
pci_nvme_identify_ns_csi(uint32_t ns, uint8_t csi) "nsid=%"PRIu32", csi=0x%"PRIx8""
pci_nvme_identify_nslist(uint32_t ns) "nsid %"PRIu32""
pci_nvme_identify_nslist_csi(uint16_t ns, uint8_t csi) "nsid=%"PRIu16", csi=0x%"PRIx8""

20
include/block/nvme.h
View File

@ -1034,6 +1034,7 @@ enum NvmeIdCns {
NVME_ID_CNS_NS_ATTACHED_CTRL_LIST = 0x12,
NVME_ID_CNS_CTRL_LIST = 0x13,
NVME_ID_CNS_PRIMARY_CTRL_CAP = 0x14,
NVME_ID_CNS_SECONDARY_CTRL_LIST = 0x15,
NVME_ID_CNS_CS_NS_PRESENT_LIST = 0x1a,
NVME_ID_CNS_CS_NS_PRESENT = 0x1b,
NVME_ID_CNS_IO_COMMAND_SET = 0x1c,
@ -1575,6 +1576,23 @@ typedef struct QEMU_PACKED NvmePriCtrlCap {
uint8_t rsvd80[4016];
} NvmePriCtrlCap;
typedef struct QEMU_PACKED NvmeSecCtrlEntry {
uint16_t scid;
uint16_t pcid;
uint8_t scs;
uint8_t rsvd5[3];
uint16_t vfn;
uint16_t nvq;
uint16_t nvi;
uint8_t rsvd14[18];
} NvmeSecCtrlEntry;
typedef struct QEMU_PACKED NvmeSecCtrlList {
uint8_t numcntl;
uint8_t rsvd1[31];
NvmeSecCtrlEntry sec[127];
} NvmeSecCtrlList;
static inline void _nvme_check_size(void)
{
QEMU_BUILD_BUG_ON(sizeof(NvmeBar) != 4096);
@ -1611,5 +1629,7 @@ static inline void _nvme_check_size(void)
QEMU_BUILD_BUG_ON(sizeof(NvmeZoneDescr) != 64);
QEMU_BUILD_BUG_ON(sizeof(NvmeDifTuple) != 16);
QEMU_BUILD_BUG_ON(sizeof(NvmePriCtrlCap) != 4096);
QEMU_BUILD_BUG_ON(sizeof(NvmeSecCtrlEntry) != 32);
QEMU_BUILD_BUG_ON(sizeof(NvmeSecCtrlList) != 4096);
}
#endif