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|
/*
* QEMU paravirtual RDMA - Command channel
*
* Copyright (C) 2018 Oracle
* Copyright (C) 2018 Red Hat Inc
*
* Authors:
* Yuval Shaia <yuval.shaia@oracle.com>
* Marcel Apfelbaum <marcel@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "hw/hw.h"
#include "hw/pci/pci.h"
#include "hw/pci/pci_ids.h"
#include "../rdma_backend.h"
#include "../rdma_rm.h"
#include "../rdma_utils.h"
#include "trace.h"
#include "pvrdma.h"
#include "standard-headers/rdma/vmw_pvrdma-abi.h"
static void *pvrdma_map_to_pdir(PCIDevice *pdev, uint64_t pdir_dma,
uint32_t nchunks, size_t length)
{
uint64_t *dir, *tbl;
int tbl_idx, dir_idx, addr_idx;
void *host_virt = NULL, *curr_page;
if (!nchunks) {
rdma_error_report("Got nchunks=0");
return NULL;
}
dir = rdma_pci_dma_map(pdev, pdir_dma, TARGET_PAGE_SIZE);
if (!dir) {
rdma_error_report("Failed to map to page directory");
return NULL;
}
tbl = rdma_pci_dma_map(pdev, dir[0], TARGET_PAGE_SIZE);
if (!tbl) {
rdma_error_report("Failed to map to page table 0");
goto out_unmap_dir;
}
curr_page = rdma_pci_dma_map(pdev, (dma_addr_t)tbl[0], TARGET_PAGE_SIZE);
if (!curr_page) {
rdma_error_report("Failed to map the page 0");
goto out_unmap_tbl;
}
host_virt = mremap(curr_page, 0, length, MREMAP_MAYMOVE);
if (host_virt == MAP_FAILED) {
host_virt = NULL;
rdma_error_report("Failed to remap memory for host_virt");
goto out_unmap_tbl;
}
trace_pvrdma_map_to_pdir_host_virt(curr_page, host_virt);
rdma_pci_dma_unmap(pdev, curr_page, TARGET_PAGE_SIZE);
dir_idx = 0;
tbl_idx = 1;
addr_idx = 1;
while (addr_idx < nchunks) {
if (tbl_idx == TARGET_PAGE_SIZE / sizeof(uint64_t)) {
tbl_idx = 0;
dir_idx++;
rdma_pci_dma_unmap(pdev, tbl, TARGET_PAGE_SIZE);
tbl = rdma_pci_dma_map(pdev, dir[dir_idx], TARGET_PAGE_SIZE);
if (!tbl) {
rdma_error_report("Failed to map to page table %d", dir_idx);
goto out_unmap_host_virt;
}
}
curr_page = rdma_pci_dma_map(pdev, (dma_addr_t)tbl[tbl_idx],
TARGET_PAGE_SIZE);
if (!curr_page) {
rdma_error_report("Failed to map to page %d, dir %d", tbl_idx,
dir_idx);
goto out_unmap_host_virt;
}
mremap(curr_page, 0, TARGET_PAGE_SIZE, MREMAP_MAYMOVE | MREMAP_FIXED,
host_virt + TARGET_PAGE_SIZE * addr_idx);
trace_pvrdma_map_to_pdir_next_page(addr_idx, curr_page, host_virt +
TARGET_PAGE_SIZE * addr_idx);
rdma_pci_dma_unmap(pdev, curr_page, TARGET_PAGE_SIZE);
addr_idx++;
tbl_idx++;
}
goto out_unmap_tbl;
out_unmap_host_virt:
munmap(host_virt, length);
host_virt = NULL;
out_unmap_tbl:
rdma_pci_dma_unmap(pdev, tbl, TARGET_PAGE_SIZE);
out_unmap_dir:
rdma_pci_dma_unmap(pdev, dir, TARGET_PAGE_SIZE);
return host_virt;
}
static int query_port(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_query_port *cmd = &req->query_port;
struct pvrdma_cmd_query_port_resp *resp = &rsp->query_port_resp;
struct pvrdma_port_attr attrs = {0};
if (cmd->port_num > MAX_PORTS) {
return -EINVAL;
}
if (rdma_backend_query_port(&dev->backend_dev,
(struct ibv_port_attr *)&attrs)) {
return -ENOMEM;
}
memset(resp, 0, sizeof(*resp));
resp->attrs.state = dev->func0->device_active ? attrs.state :
PVRDMA_PORT_DOWN;
resp->attrs.max_mtu = attrs.max_mtu;
resp->attrs.active_mtu = attrs.active_mtu;
resp->attrs.phys_state = attrs.phys_state;
resp->attrs.gid_tbl_len = MIN(MAX_PORT_GIDS, attrs.gid_tbl_len);
resp->attrs.max_msg_sz = 1024;
resp->attrs.pkey_tbl_len = MIN(MAX_PORT_PKEYS, attrs.pkey_tbl_len);
resp->attrs.active_width = 1;
resp->attrs.active_speed = 1;
return 0;
}
static int query_pkey(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_query_pkey *cmd = &req->query_pkey;
struct pvrdma_cmd_query_pkey_resp *resp = &rsp->query_pkey_resp;
if (cmd->port_num > MAX_PORTS) {
return -EINVAL;
}
if (cmd->index > MAX_PKEYS) {
return -EINVAL;
}
memset(resp, 0, sizeof(*resp));
resp->pkey = PVRDMA_PKEY;
return 0;
}
static int create_pd(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_create_pd *cmd = &req->create_pd;
struct pvrdma_cmd_create_pd_resp *resp = &rsp->create_pd_resp;
int rc;
memset(resp, 0, sizeof(*resp));
rc = rdma_rm_alloc_pd(&dev->rdma_dev_res, &dev->backend_dev,
&resp->pd_handle, cmd->ctx_handle);
return rc;
}
static int destroy_pd(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_destroy_pd *cmd = &req->destroy_pd;
rdma_rm_dealloc_pd(&dev->rdma_dev_res, cmd->pd_handle);
return 0;
}
static int create_mr(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_create_mr *cmd = &req->create_mr;
struct pvrdma_cmd_create_mr_resp *resp = &rsp->create_mr_resp;
PCIDevice *pci_dev = PCI_DEVICE(dev);
void *host_virt = NULL;
int rc = 0;
memset(resp, 0, sizeof(*resp));
if (!(cmd->flags & PVRDMA_MR_FLAG_DMA)) {
host_virt = pvrdma_map_to_pdir(pci_dev, cmd->pdir_dma, cmd->nchunks,
cmd->length);
if (!host_virt) {
rdma_error_report("Failed to map to pdir");
return -EINVAL;
}
}
rc = rdma_rm_alloc_mr(&dev->rdma_dev_res, cmd->pd_handle, cmd->start,
cmd->length, host_virt, cmd->access_flags,
&resp->mr_handle, &resp->lkey, &resp->rkey);
if (rc && host_virt) {
munmap(host_virt, cmd->length);
}
return rc;
}
static int destroy_mr(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_destroy_mr *cmd = &req->destroy_mr;
rdma_rm_dealloc_mr(&dev->rdma_dev_res, cmd->mr_handle);
return 0;
}
static int create_cq_ring(PCIDevice *pci_dev , PvrdmaRing **ring,
uint64_t pdir_dma, uint32_t nchunks, uint32_t cqe)
{
uint64_t *dir = NULL, *tbl = NULL;
PvrdmaRing *r;
int rc = -EINVAL;
char ring_name[MAX_RING_NAME_SZ];
if (!nchunks || nchunks > PVRDMA_MAX_FAST_REG_PAGES) {
rdma_error_report("Got invalid nchunks: %d", nchunks);
return rc;
}
dir = rdma_pci_dma_map(pci_dev, pdir_dma, TARGET_PAGE_SIZE);
if (!dir) {
rdma_error_report("Failed to map to CQ page directory");
goto out;
}
tbl = rdma_pci_dma_map(pci_dev, dir[0], TARGET_PAGE_SIZE);
if (!tbl) {
rdma_error_report("Failed to map to CQ page table");
goto out;
}
r = g_malloc(sizeof(*r));
*ring = r;
r->ring_state = (struct pvrdma_ring *)
rdma_pci_dma_map(pci_dev, tbl[0], TARGET_PAGE_SIZE);
if (!r->ring_state) {
rdma_error_report("Failed to map to CQ ring state");
goto out_free_ring;
}
sprintf(ring_name, "cq_ring_%" PRIx64, pdir_dma);
rc = pvrdma_ring_init(r, ring_name, pci_dev, &r->ring_state[1],
cqe, sizeof(struct pvrdma_cqe),
/* first page is ring state */
(dma_addr_t *)&tbl[1], nchunks - 1);
if (rc) {
goto out_unmap_ring_state;
}
goto out;
out_unmap_ring_state:
/* ring_state was in slot 1, not 0 so need to jump back */
rdma_pci_dma_unmap(pci_dev, --r->ring_state, TARGET_PAGE_SIZE);
out_free_ring:
g_free(r);
out:
rdma_pci_dma_unmap(pci_dev, tbl, TARGET_PAGE_SIZE);
rdma_pci_dma_unmap(pci_dev, dir, TARGET_PAGE_SIZE);
return rc;
}
static void destroy_cq_ring(PvrdmaRing *ring)
{
pvrdma_ring_free(ring);
/* ring_state was in slot 1, not 0 so need to jump back */
rdma_pci_dma_unmap(ring->dev, --ring->ring_state, TARGET_PAGE_SIZE);
g_free(ring);
}
static int create_cq(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_create_cq *cmd = &req->create_cq;
struct pvrdma_cmd_create_cq_resp *resp = &rsp->create_cq_resp;
PvrdmaRing *ring = NULL;
int rc;
memset(resp, 0, sizeof(*resp));
resp->cqe = cmd->cqe;
rc = create_cq_ring(PCI_DEVICE(dev), &ring, cmd->pdir_dma, cmd->nchunks,
cmd->cqe);
if (rc) {
return rc;
}
rc = rdma_rm_alloc_cq(&dev->rdma_dev_res, &dev->backend_dev, cmd->cqe,
&resp->cq_handle, ring);
if (rc) {
destroy_cq_ring(ring);
}
resp->cqe = cmd->cqe;
return rc;
}
static int destroy_cq(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_destroy_cq *cmd = &req->destroy_cq;
RdmaRmCQ *cq;
PvrdmaRing *ring;
cq = rdma_rm_get_cq(&dev->rdma_dev_res, cmd->cq_handle);
if (!cq) {
rdma_error_report("Got invalid CQ handle");
return -EINVAL;
}
ring = (PvrdmaRing *)cq->opaque;
destroy_cq_ring(ring);
rdma_rm_dealloc_cq(&dev->rdma_dev_res, cmd->cq_handle);
return 0;
}
static int create_qp_rings(PCIDevice *pci_dev, uint64_t pdir_dma,
PvrdmaRing **rings, uint32_t scqe, uint32_t smax_sge,
uint32_t spages, uint32_t rcqe, uint32_t rmax_sge,
uint32_t rpages)
{
uint64_t *dir = NULL, *tbl = NULL;
PvrdmaRing *sr, *rr;
int rc = -EINVAL;
char ring_name[MAX_RING_NAME_SZ];
uint32_t wqe_sz;
if (!spages || spages > PVRDMA_MAX_FAST_REG_PAGES
|| !rpages || rpages > PVRDMA_MAX_FAST_REG_PAGES) {
rdma_error_report("Got invalid page count for QP ring: %d, %d", spages,
rpages);
return rc;
}
dir = rdma_pci_dma_map(pci_dev, pdir_dma, TARGET_PAGE_SIZE);
if (!dir) {
rdma_error_report("Failed to map to CQ page directory");
goto out;
}
tbl = rdma_pci_dma_map(pci_dev, dir[0], TARGET_PAGE_SIZE);
if (!tbl) {
rdma_error_report("Failed to map to CQ page table");
goto out;
}
sr = g_malloc(2 * sizeof(*rr));
rr = &sr[1];
*rings = sr;
/* Create send ring */
sr->ring_state = (struct pvrdma_ring *)
rdma_pci_dma_map(pci_dev, tbl[0], TARGET_PAGE_SIZE);
if (!sr->ring_state) {
rdma_error_report("Failed to map to CQ ring state");
goto out_free_sr_mem;
}
wqe_sz = pow2ceil(sizeof(struct pvrdma_sq_wqe_hdr) +
sizeof(struct pvrdma_sge) * smax_sge - 1);
sprintf(ring_name, "qp_sring_%" PRIx64, pdir_dma);
rc = pvrdma_ring_init(sr, ring_name, pci_dev, sr->ring_state,
scqe, wqe_sz, (dma_addr_t *)&tbl[1], spages);
if (rc) {
goto out_unmap_ring_state;
}
/* Create recv ring */
rr->ring_state = &sr->ring_state[1];
wqe_sz = pow2ceil(sizeof(struct pvrdma_rq_wqe_hdr) +
sizeof(struct pvrdma_sge) * rmax_sge - 1);
sprintf(ring_name, "qp_rring_%" PRIx64, pdir_dma);
rc = pvrdma_ring_init(rr, ring_name, pci_dev, rr->ring_state,
rcqe, wqe_sz, (dma_addr_t *)&tbl[1 + spages], rpages);
if (rc) {
goto out_free_sr;
}
goto out;
out_free_sr:
pvrdma_ring_free(sr);
out_unmap_ring_state:
rdma_pci_dma_unmap(pci_dev, sr->ring_state, TARGET_PAGE_SIZE);
out_free_sr_mem:
g_free(sr);
out:
rdma_pci_dma_unmap(pci_dev, tbl, TARGET_PAGE_SIZE);
rdma_pci_dma_unmap(pci_dev, dir, TARGET_PAGE_SIZE);
return rc;
}
static void destroy_qp_rings(PvrdmaRing *ring)
{
pvrdma_ring_free(&ring[0]);
pvrdma_ring_free(&ring[1]);
rdma_pci_dma_unmap(ring->dev, ring->ring_state, TARGET_PAGE_SIZE);
g_free(ring);
}
static int create_qp(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_create_qp *cmd = &req->create_qp;
struct pvrdma_cmd_create_qp_resp *resp = &rsp->create_qp_resp;
PvrdmaRing *rings = NULL;
int rc;
memset(resp, 0, sizeof(*resp));
rc = create_qp_rings(PCI_DEVICE(dev), cmd->pdir_dma, &rings,
cmd->max_send_wr, cmd->max_send_sge, cmd->send_chunks,
cmd->max_recv_wr, cmd->max_recv_sge,
cmd->total_chunks - cmd->send_chunks - 1);
if (rc) {
return rc;
}
rc = rdma_rm_alloc_qp(&dev->rdma_dev_res, cmd->pd_handle, cmd->qp_type,
cmd->max_send_wr, cmd->max_send_sge,
cmd->send_cq_handle, cmd->max_recv_wr,
cmd->max_recv_sge, cmd->recv_cq_handle, rings,
&resp->qpn);
if (rc) {
destroy_qp_rings(rings);
return rc;
}
resp->max_send_wr = cmd->max_send_wr;
resp->max_recv_wr = cmd->max_recv_wr;
resp->max_send_sge = cmd->max_send_sge;
resp->max_recv_sge = cmd->max_recv_sge;
resp->max_inline_data = cmd->max_inline_data;
return 0;
}
static int modify_qp(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_modify_qp *cmd = &req->modify_qp;
int rc;
memset(rsp, 0, sizeof(*rsp));
/* No need to verify sgid_index since it is u8 */
rc = rdma_rm_modify_qp(&dev->rdma_dev_res, &dev->backend_dev,
cmd->qp_handle, cmd->attr_mask,
cmd->attrs.ah_attr.grh.sgid_index,
(union ibv_gid *)&cmd->attrs.ah_attr.grh.dgid,
cmd->attrs.dest_qp_num,
(enum ibv_qp_state)cmd->attrs.qp_state,
cmd->attrs.qkey, cmd->attrs.rq_psn,
cmd->attrs.sq_psn);
return rc;
}
static int query_qp(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_query_qp *cmd = &req->query_qp;
struct pvrdma_cmd_query_qp_resp *resp = &rsp->query_qp_resp;
struct ibv_qp_init_attr init_attr;
int rc;
memset(rsp, 0, sizeof(*rsp));
rc = rdma_rm_query_qp(&dev->rdma_dev_res, &dev->backend_dev, cmd->qp_handle,
(struct ibv_qp_attr *)&resp->attrs, cmd->attr_mask,
&init_attr);
return rc;
}
static int destroy_qp(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_destroy_qp *cmd = &req->destroy_qp;
RdmaRmQP *qp;
PvrdmaRing *ring;
qp = rdma_rm_get_qp(&dev->rdma_dev_res, cmd->qp_handle);
if (!qp) {
return -EINVAL;
}
rdma_rm_dealloc_qp(&dev->rdma_dev_res, cmd->qp_handle);
ring = (PvrdmaRing *)qp->opaque;
destroy_qp_rings(ring);
return 0;
}
static int create_bind(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_create_bind *cmd = &req->create_bind;
int rc;
union ibv_gid *gid = (union ibv_gid *)&cmd->new_gid;
if (cmd->index >= MAX_PORT_GIDS) {
return -EINVAL;
}
rc = rdma_rm_add_gid(&dev->rdma_dev_res, &dev->backend_dev,
dev->backend_eth_device_name, gid, cmd->index);
return rc;
}
static int destroy_bind(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
int rc;
struct pvrdma_cmd_destroy_bind *cmd = &req->destroy_bind;
if (cmd->index >= MAX_PORT_GIDS) {
return -EINVAL;
}
rc = rdma_rm_del_gid(&dev->rdma_dev_res, &dev->backend_dev,
dev->backend_eth_device_name, cmd->index);
return rc;
}
static int create_uc(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_create_uc *cmd = &req->create_uc;
struct pvrdma_cmd_create_uc_resp *resp = &rsp->create_uc_resp;
int rc;
memset(resp, 0, sizeof(*resp));
rc = rdma_rm_alloc_uc(&dev->rdma_dev_res, cmd->pfn, &resp->ctx_handle);
return rc;
}
static int destroy_uc(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_destroy_uc *cmd = &req->destroy_uc;
rdma_rm_dealloc_uc(&dev->rdma_dev_res, cmd->ctx_handle);
return 0;
}
struct cmd_handler {
uint32_t cmd;
uint32_t ack;
int (*exec)(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp);
};
static struct cmd_handler cmd_handlers[] = {
{PVRDMA_CMD_QUERY_PORT, PVRDMA_CMD_QUERY_PORT_RESP, query_port},
{PVRDMA_CMD_QUERY_PKEY, PVRDMA_CMD_QUERY_PKEY_RESP, query_pkey},
{PVRDMA_CMD_CREATE_PD, PVRDMA_CMD_CREATE_PD_RESP, create_pd},
{PVRDMA_CMD_DESTROY_PD, PVRDMA_CMD_DESTROY_PD_RESP_NOOP, destroy_pd},
{PVRDMA_CMD_CREATE_MR, PVRDMA_CMD_CREATE_MR_RESP, create_mr},
{PVRDMA_CMD_DESTROY_MR, PVRDMA_CMD_DESTROY_MR_RESP_NOOP, destroy_mr},
{PVRDMA_CMD_CREATE_CQ, PVRDMA_CMD_CREATE_CQ_RESP, create_cq},
{PVRDMA_CMD_RESIZE_CQ, PVRDMA_CMD_RESIZE_CQ_RESP, NULL},
{PVRDMA_CMD_DESTROY_CQ, PVRDMA_CMD_DESTROY_CQ_RESP_NOOP, destroy_cq},
{PVRDMA_CMD_CREATE_QP, PVRDMA_CMD_CREATE_QP_RESP, create_qp},
{PVRDMA_CMD_MODIFY_QP, PVRDMA_CMD_MODIFY_QP_RESP, modify_qp},
{PVRDMA_CMD_QUERY_QP, PVRDMA_CMD_QUERY_QP_RESP, query_qp},
{PVRDMA_CMD_DESTROY_QP, PVRDMA_CMD_DESTROY_QP_RESP, destroy_qp},
{PVRDMA_CMD_CREATE_UC, PVRDMA_CMD_CREATE_UC_RESP, create_uc},
{PVRDMA_CMD_DESTROY_UC, PVRDMA_CMD_DESTROY_UC_RESP_NOOP, destroy_uc},
{PVRDMA_CMD_CREATE_BIND, PVRDMA_CMD_CREATE_BIND_RESP_NOOP, create_bind},
{PVRDMA_CMD_DESTROY_BIND, PVRDMA_CMD_DESTROY_BIND_RESP_NOOP, destroy_bind},
};
int pvrdma_exec_cmd(PVRDMADev *dev)
{
int err = 0xFFFF;
DSRInfo *dsr_info;
dsr_info = &dev->dsr_info;
if (dsr_info->req->hdr.cmd >= sizeof(cmd_handlers) /
sizeof(struct cmd_handler)) {
rdma_error_report("Unsupported command");
goto out;
}
if (!cmd_handlers[dsr_info->req->hdr.cmd].exec) {
rdma_error_report("Unsupported command (not implemented yet)");
goto out;
}
err = cmd_handlers[dsr_info->req->hdr.cmd].exec(dev, dsr_info->req,
dsr_info->rsp);
dsr_info->rsp->hdr.response = dsr_info->req->hdr.response;
dsr_info->rsp->hdr.ack = cmd_handlers[dsr_info->req->hdr.cmd].ack;
dsr_info->rsp->hdr.err = err < 0 ? -err : 0;
trace_pvrdma_exec_cmd(dsr_info->req->hdr.cmd, dsr_info->rsp->hdr.err);
dev->stats.commands++;
out:
set_reg_val(dev, PVRDMA_REG_ERR, err);
post_interrupt(dev, INTR_VEC_CMD_RING);
return (err == 0) ? 0 : -EINVAL;
}
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