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hw/rdma: PVRDMA commands and data-path ops

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First PVRDMA sub-module - implementation of the PVRDMA device.
- PVRDMA commands such as create CQ and create MR.
- Data path QP operations - post_send and post_recv.
- Completion handler.

Reviewed-by: Dotan Barak <dotanb@mellanox.com>
Reviewed-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
This commit is contained in:
Yuval Shaia 2018-02-09 15:39:19 +02:00 committed by Marcel Apfelbaum
parent ef6d4ccdc9
commit 98d176f8e5
7 changed files with 1243 additions and 0 deletions
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2
hw/rdma/Makefile.objs
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@ -1,3 +1,5 @@
ifeq ($(CONFIG_RDMA),y)
obj-$(CONFIG_PCI) += rdma_utils.o rdma_backend.o rdma_rm.o
obj-$(CONFIG_PCI) += vmw/pvrdma_dev_ring.o vmw/pvrdma_cmd.o \
vmw/pvrdma_qp_ops.o
endif

122
hw/rdma/vmw/pvrdma.h Normal file
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@ -0,0 +1,122 @@
/*
* QEMU VMWARE paravirtual RDMA device definitions
*
* 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.
*
*/
#ifndef PVRDMA_PVRDMA_H
#define PVRDMA_PVRDMA_H
#include <hw/pci/pci.h>
#include <hw/pci/msix.h>
#include "../rdma_backend_defs.h"
#include "../rdma_rm_defs.h"
#include <standard-headers/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h>
#include <standard-headers/drivers/infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h>
#include "pvrdma_dev_ring.h"
/* BARs */
#define RDMA_MSIX_BAR_IDX 0
#define RDMA_REG_BAR_IDX 1
#define RDMA_UAR_BAR_IDX 2
#define RDMA_BAR0_MSIX_SIZE (16 * 1024)
#define RDMA_BAR1_REGS_SIZE 256
#define RDMA_BAR2_UAR_SIZE (0x1000 * MAX_UCS) /* each uc gets page */
/* MSIX */
#define RDMA_MAX_INTRS 3
#define RDMA_MSIX_TABLE 0x0000
#define RDMA_MSIX_PBA 0x2000
/* Interrupts Vectors */
#define INTR_VEC_CMD_RING 0
#define INTR_VEC_CMD_ASYNC_EVENTS 1
#define INTR_VEC_CMD_COMPLETION_Q 2
/* HW attributes */
#define PVRDMA_HW_NAME "pvrdma"
#define PVRDMA_HW_VERSION 17
#define PVRDMA_FW_VERSION 14
typedef struct DSRInfo {
dma_addr_t dma;
struct pvrdma_device_shared_region *dsr;
union pvrdma_cmd_req *req;
union pvrdma_cmd_resp *rsp;
struct pvrdma_ring *async_ring_state;
PvrdmaRing async;
struct pvrdma_ring *cq_ring_state;
PvrdmaRing cq;
} DSRInfo;
typedef struct PVRDMADev {
PCIDevice parent_obj;
MemoryRegion msix;
MemoryRegion regs;
uint32_t regs_data[RDMA_BAR1_REGS_SIZE];
MemoryRegion uar;
uint32_t uar_data[RDMA_BAR2_UAR_SIZE];
DSRInfo dsr_info;
int interrupt_mask;
struct ibv_device_attr dev_attr;
uint64_t node_guid;
char *backend_device_name;
uint8_t backend_gid_idx;
uint8_t backend_port_num;
RdmaBackendDev backend_dev;
RdmaDeviceResources rdma_dev_res;
} PVRDMADev;
#define PVRDMA_DEV(dev) OBJECT_CHECK(PVRDMADev, (dev), PVRDMA_HW_NAME)
static inline int get_reg_val(PVRDMADev *dev, hwaddr addr, uint32_t *val)
{
int idx = addr >> 2;
if (idx > RDMA_BAR1_REGS_SIZE) {
return -EINVAL;
}
*val = dev->regs_data[idx];
return 0;
}
static inline int set_reg_val(PVRDMADev *dev, hwaddr addr, uint32_t val)
{
int idx = addr >> 2;
if (idx > RDMA_BAR1_REGS_SIZE) {
return -EINVAL;
}
dev->regs_data[idx] = val;
return 0;
}
static inline void post_interrupt(PVRDMADev *dev, unsigned vector)
{
PCIDevice *pci_dev = PCI_DEVICE(dev);
if (likely(!dev->interrupt_mask)) {
msix_notify(pci_dev, vector);
}
}
int execute_command(PVRDMADev *dev);
#endif

673
hw/rdma/vmw/pvrdma_cmd.c Normal file
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@ -0,0 +1,673 @@
/*
* 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 <qemu/error-report.h>
#include <cpu.h>
#include <linux/types.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 "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) {
pr_dbg("nchunks=0\n");
return NULL;
}
dir = rdma_pci_dma_map(pdev, pdir_dma, TARGET_PAGE_SIZE);
if (!dir) {
error_report("PVRDMA: Failed to map to page directory");
return NULL;
}
tbl = rdma_pci_dma_map(pdev, dir[0], TARGET_PAGE_SIZE);
if (!tbl) {
error_report("PVRDMA: 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) {
error_report("PVRDMA: Failed to map the first page");
goto out_unmap_tbl;
}
host_virt = mremap(curr_page, 0, length, MREMAP_MAYMOVE);
if (host_virt == MAP_FAILED) {
host_virt = NULL;
error_report("PVRDMA: Failed to remap memory for host_virt");
goto out_unmap_tbl;
}
rdma_pci_dma_unmap(pdev, curr_page, TARGET_PAGE_SIZE);
pr_dbg("host_virt=%p\n", host_virt);
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++;
pr_dbg("Mapping to table %d\n", 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) {
error_report("PVRDMA: Failed to map to page table %d", dir_idx);
goto out_unmap_host_virt;
}
}
pr_dbg("guest_dma[%d]=0x%lx\n", addr_idx, tbl[tbl_idx]);
curr_page = rdma_pci_dma_map(pdev, (dma_addr_t)tbl[tbl_idx],
TARGET_PAGE_SIZE);
if (!curr_page) {
error_report("PVRDMA: 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);
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};
pr_dbg("port=%d\n", cmd->port_num);
if (rdma_backend_query_port(&dev->backend_dev,
(struct ibv_port_attr *)&attrs)) {
return -ENOMEM;
}
memset(resp, 0, sizeof(*resp));
resp->hdr.response = cmd->hdr.response;
resp->hdr.ack = PVRDMA_CMD_QUERY_PORT_RESP;
resp->hdr.err = 0;
resp->attrs.state = attrs.state;
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;
pr_dbg("port=%d\n", cmd->port_num);
pr_dbg("index=%d\n", cmd->index);
memset(resp, 0, sizeof(*resp));
resp->hdr.response = cmd->hdr.response;
resp->hdr.ack = PVRDMA_CMD_QUERY_PKEY_RESP;
resp->hdr.err = 0;
resp->pkey = 0x7FFF;
pr_dbg("pkey=0x%x\n", resp->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;
pr_dbg("context=0x%x\n", cmd->ctx_handle ? cmd->ctx_handle : 0);
memset(resp, 0, sizeof(*resp));
resp->hdr.response = cmd->hdr.response;
resp->hdr.ack = PVRDMA_CMD_CREATE_PD_RESP;
resp->hdr.err = rdma_rm_alloc_pd(&dev->rdma_dev_res, &dev->backend_dev,
&resp->pd_handle, cmd->ctx_handle);
pr_dbg("ret=%d\n", resp->hdr.err);
return resp->hdr.err;
}
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;
pr_dbg("pd_handle=%d\n", cmd->pd_handle);
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;
memset(resp, 0, sizeof(*resp));
resp->hdr.response = cmd->hdr.response;
resp->hdr.ack = PVRDMA_CMD_CREATE_MR_RESP;
pr_dbg("pd_handle=%d\n", cmd->pd_handle);
pr_dbg("access_flags=0x%x\n", cmd->access_flags);
pr_dbg("flags=0x%x\n", cmd->flags);
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) {
pr_dbg("Failed to map to pdir\n");
resp->hdr.err = -EINVAL;
goto out;
}
}
resp->hdr.err = 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 (!resp->hdr.err) {
munmap(host_virt, cmd->length);
}
out:
pr_dbg("ret=%d\n", resp->hdr.err);
return resp->hdr.err;
}
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;
pr_dbg("mr_handle=%d\n", cmd->mr_handle);
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];
pr_dbg("pdir_dma=0x%llx\n", (long long unsigned int)pdir_dma);
dir = rdma_pci_dma_map(pci_dev, pdir_dma, TARGET_PAGE_SIZE);
if (!dir) {
pr_dbg("Failed to map to CQ page directory\n");
goto out;
}
tbl = rdma_pci_dma_map(pci_dev, dir[0], TARGET_PAGE_SIZE);
if (!tbl) {
pr_dbg("Failed to map to CQ page table\n");
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) {
pr_dbg("Failed to map to CQ ring state\n");
goto out_free_ring;
}
sprintf(ring_name, "cq_ring_%lx", 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 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;
memset(resp, 0, sizeof(*resp));
resp->hdr.response = cmd->hdr.response;
resp->hdr.ack = PVRDMA_CMD_CREATE_CQ_RESP;
resp->cqe = cmd->cqe;
resp->hdr.err = create_cq_ring(PCI_DEVICE(dev), &ring, cmd->pdir_dma,
cmd->nchunks, cmd->cqe);
if (resp->hdr.err) {
goto out;
}
pr_dbg("ring=%p\n", ring);
resp->hdr.err = rdma_rm_alloc_cq(&dev->rdma_dev_res, &dev->backend_dev,
cmd->cqe, &resp->cq_handle, ring);
resp->cqe = cmd->cqe;
out:
pr_dbg("ret=%d\n", resp->hdr.err);
return resp->hdr.err;
}
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;
pr_dbg("cq_handle=%d\n", cmd->cq_handle);
cq = rdma_rm_get_cq(&dev->rdma_dev_res, cmd->cq_handle);
if (!cq) {
pr_dbg("Invalid CQ handle\n");
return -EINVAL;
}
ring = (PvrdmaRing *)cq->opaque;
pvrdma_ring_free(ring);
/* ring_state was in slot 1, not 0 so need to jump back */
rdma_pci_dma_unmap(PCI_DEVICE(dev), --ring->ring_state, TARGET_PAGE_SIZE);
g_free(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;
pr_dbg("pdir_dma=0x%llx\n", (long long unsigned int)pdir_dma);
dir = rdma_pci_dma_map(pci_dev, pdir_dma, TARGET_PAGE_SIZE);
if (!dir) {
pr_dbg("Failed to map to CQ page directory\n");
goto out;
}
tbl = rdma_pci_dma_map(pci_dev, dir[0], TARGET_PAGE_SIZE);
if (!tbl) {
pr_dbg("Failed to map to CQ page table\n");
goto out;
}
sr = g_malloc(2 * sizeof(*rr));
rr = &sr[1];
pr_dbg("sring=%p\n", sr);
pr_dbg("rring=%p\n", rr);
*rings = sr;
pr_dbg("scqe=%d\n", scqe);
pr_dbg("smax_sge=%d\n", smax_sge);
pr_dbg("spages=%d\n", spages);
pr_dbg("rcqe=%d\n", rcqe);
pr_dbg("rmax_sge=%d\n", rmax_sge);
pr_dbg("rpages=%d\n", rpages);
/* Create send ring */
sr->ring_state = (struct pvrdma_ring *)
rdma_pci_dma_map(pci_dev, tbl[0], TARGET_PAGE_SIZE);
if (!sr->ring_state) {
pr_dbg("Failed to map to CQ ring state\n");
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_%lx", 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_%lx", 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 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;
memset(resp, 0, sizeof(*resp));
resp->hdr.response = cmd->hdr.response;
resp->hdr.ack = PVRDMA_CMD_CREATE_QP_RESP;
pr_dbg("total_chunks=%d\n", cmd->total_chunks);
pr_dbg("send_chunks=%d\n", cmd->send_chunks);
resp->hdr.err = 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 (resp->hdr.err) {
goto out;
}
pr_dbg("rings=%p\n", rings);
resp->hdr.err = 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);
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;
out:
pr_dbg("ret=%d\n", resp->hdr.err);
return resp->hdr.err;
}
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;
pr_dbg("qp_handle=%d\n", cmd->qp_handle);
memset(rsp, 0, sizeof(*rsp));
rsp->hdr.response = cmd->hdr.response;
rsp->hdr.ack = PVRDMA_CMD_MODIFY_QP_RESP;
rsp->hdr.err = rdma_rm_modify_qp(&dev->rdma_dev_res, &dev->backend_dev,
cmd->qp_handle, cmd->attr_mask,
(union ibv_gid *)&cmd->attrs.ah_attr.grh.dgid,
cmd->attrs.dest_qp_num, cmd->attrs.qp_state,
cmd->attrs.qkey, cmd->attrs.rq_psn,
cmd->attrs.sq_psn);
pr_dbg("ret=%d\n", rsp->hdr.err);
return rsp->hdr.err;
}
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) {
pr_dbg("Invalid QP handle\n");
return -EINVAL;
}
rdma_rm_dealloc_qp(&dev->rdma_dev_res, cmd->qp_handle);
ring = (PvrdmaRing *)qp->opaque;
pr_dbg("sring=%p\n", &ring[0]);
pvrdma_ring_free(&ring[0]);
pr_dbg("rring=%p\n", &ring[1]);
pvrdma_ring_free(&ring[1]);
rdma_pci_dma_unmap(PCI_DEVICE(dev), ring->ring_state, TARGET_PAGE_SIZE);
g_free(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;
#ifdef PVRDMA_DEBUG
__be64 *subnet = (__be64 *)&cmd->new_gid[0];
__be64 *if_id = (__be64 *)&cmd->new_gid[8];
#endif
pr_dbg("index=%d\n", cmd->index);
if (cmd->index > MAX_PORT_GIDS) {
return -EINVAL;
}
pr_dbg("gid[%d]=0x%llx,0x%llx\n", cmd->index,
(long long unsigned int)be64_to_cpu(*subnet),
(long long unsigned int)be64_to_cpu(*if_id));
/* Driver forces to one port only */
memcpy(dev->rdma_dev_res.ports[0].gid_tbl[cmd->index].raw, &cmd->new_gid,
sizeof(cmd->new_gid));
/* TODO: Since drivers stores node_guid at load_dsr phase then this
* assignment is not relevant, i need to figure out a way how to
* retrieve MAC of our netdev */
dev->node_guid = dev->rdma_dev_res.ports[0].gid_tbl[0].global.interface_id;
pr_dbg("dev->node_guid=0x%llx\n",
(long long unsigned int)be64_to_cpu(dev->node_guid));
return 0;
}
static int destroy_bind(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp)
{
struct pvrdma_cmd_destroy_bind *cmd = &req->destroy_bind;
pr_dbg("clear index %d\n", cmd->index);
memset(dev->rdma_dev_res.ports[0].gid_tbl[cmd->index].raw, 0,
sizeof(dev->rdma_dev_res.ports[0].gid_tbl[cmd->index].raw));
return 0;
}
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;
pr_dbg("pfn=%d\n", cmd->pfn);
memset(resp, 0, sizeof(*resp));
resp->hdr.response = cmd->hdr.response;
resp->hdr.ack = PVRDMA_CMD_CREATE_UC_RESP;
resp->hdr.err = rdma_rm_alloc_uc(&dev->rdma_dev_res, cmd->pfn,
&resp->ctx_handle);
pr_dbg("ret=%d\n", resp->hdr.err);
return 0;
}
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;
pr_dbg("ctx_handle=%d\n", cmd->ctx_handle);
rdma_rm_dealloc_uc(&dev->rdma_dev_res, cmd->ctx_handle);
return 0;
}
struct cmd_handler {
uint32_t cmd;
int (*exec)(PVRDMADev *dev, union pvrdma_cmd_req *req,
union pvrdma_cmd_resp *rsp);
};
static struct cmd_handler cmd_handlers[] = {
{PVRDMA_CMD_QUERY_PORT, query_port},
{PVRDMA_CMD_QUERY_PKEY, query_pkey},
{PVRDMA_CMD_CREATE_PD, create_pd},
{PVRDMA_CMD_DESTROY_PD, destroy_pd},
{PVRDMA_CMD_CREATE_MR, create_mr},
{PVRDMA_CMD_DESTROY_MR, destroy_mr},
{PVRDMA_CMD_CREATE_CQ, create_cq},
{PVRDMA_CMD_RESIZE_CQ, NULL},
{PVRDMA_CMD_DESTROY_CQ, destroy_cq},
{PVRDMA_CMD_CREATE_QP, create_qp},
{PVRDMA_CMD_MODIFY_QP, modify_qp},
{PVRDMA_CMD_QUERY_QP, NULL},
{PVRDMA_CMD_DESTROY_QP, destroy_qp},
{PVRDMA_CMD_CREATE_UC, create_uc},
{PVRDMA_CMD_DESTROY_UC, destroy_uc},
{PVRDMA_CMD_CREATE_BIND, create_bind},
{PVRDMA_CMD_DESTROY_BIND, destroy_bind},
};
int execute_command(PVRDMADev *dev)
{
int err = 0xFFFF;
DSRInfo *dsr_info;
dsr_info = &dev->dsr_info;
pr_dbg("cmd=%d\n", dsr_info->req->hdr.cmd);
if (dsr_info->req->hdr.cmd >= sizeof(cmd_handlers) /
sizeof(struct cmd_handler)) {
pr_dbg("Unsupported command\n");
goto out;
}
if (!cmd_handlers[dsr_info->req->hdr.cmd].exec) {
pr_dbg("Unsupported command (not implemented yet)\n");
goto out;
}
err = cmd_handlers[dsr_info->req->hdr.cmd].exec(dev, dsr_info->req,
dsr_info->rsp);
out:
set_reg_val(dev, PVRDMA_REG_ERR, err);
post_interrupt(dev, INTR_VEC_CMD_RING);
return (err == 0) ? 0 : -EINVAL;
}

155
hw/rdma/vmw/pvrdma_dev_ring.c Normal file
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/*
* QEMU paravirtual RDMA - Device rings
*
* 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 <hw/pci/pci.h>
#include <cpu.h>
#include "../rdma_utils.h"
#include <standard-headers/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h>
#include "pvrdma_dev_ring.h"
int pvrdma_ring_init(PvrdmaRing *ring, const char *name, PCIDevice *dev,
struct pvrdma_ring *ring_state, uint32_t max_elems,
size_t elem_sz, dma_addr_t *tbl, dma_addr_t npages)
{
int i;
int rc = 0;
strncpy(ring->name, name, MAX_RING_NAME_SZ);
ring->name[MAX_RING_NAME_SZ - 1] = 0;
pr_dbg("Initializing %s ring\n", ring->name);
ring->dev = dev;
ring->ring_state = ring_state;
ring->max_elems = max_elems;
ring->elem_sz = elem_sz;
pr_dbg("ring->elem_sz=%ld\n", ring->elem_sz);
pr_dbg("npages=%ld\n", npages);
/* TODO: Give a moment to think if we want to redo driver settings
atomic_set(&ring->ring_state->prod_tail, 0);
atomic_set(&ring->ring_state->cons_head, 0);
*/
ring->npages = npages;
ring->pages = g_malloc(npages * sizeof(void *));
for (i = 0; i < npages; i++) {
if (!tbl[i]) {
pr_err("npages=%ld but tbl[%d] is NULL\n", (long)npages, i);
continue;
}
ring->pages[i] = rdma_pci_dma_map(dev, tbl[i], TARGET_PAGE_SIZE);
if (!ring->pages[i]) {
rc = -ENOMEM;
pr_dbg("Failed to map to page %d\n", i);
goto out_free;
}
memset(ring->pages[i], 0, TARGET_PAGE_SIZE);
}
goto out;
out_free:
while (i--) {
rdma_pci_dma_unmap(dev, ring->pages[i], TARGET_PAGE_SIZE);
}
g_free(ring->pages);
out:
return rc;
}
void *pvrdma_ring_next_elem_read(PvrdmaRing *ring)
{
unsigned int idx = 0, offset;
/*
pr_dbg("%s: t=%d, h=%d\n", ring->name, ring->ring_state->prod_tail,
ring->ring_state->cons_head);
*/
if (!pvrdma_idx_ring_has_data(ring->ring_state, ring->max_elems, &idx)) {
pr_dbg("No more data in ring\n");
return NULL;
}
offset = idx * ring->elem_sz;
/*
pr_dbg("idx=%d\n", idx);
pr_dbg("offset=%d\n", offset);
*/
return ring->pages[offset / TARGET_PAGE_SIZE] + (offset % TARGET_PAGE_SIZE);
}
void pvrdma_ring_read_inc(PvrdmaRing *ring)
{
pvrdma_idx_ring_inc(&ring->ring_state->cons_head, ring->max_elems);
/*
pr_dbg("%s: t=%d, h=%d, m=%ld\n", ring->name,
ring->ring_state->prod_tail, ring->ring_state->cons_head,
ring->max_elems);
*/
}
void *pvrdma_ring_next_elem_write(PvrdmaRing *ring)
{
unsigned int idx, offset, tail;
/*
pr_dbg("%s: t=%d, h=%d\n", ring->name, ring->ring_state->prod_tail,
ring->ring_state->cons_head);
*/
if (!pvrdma_idx_ring_has_space(ring->ring_state, ring->max_elems, &tail)) {
pr_dbg("CQ is full\n");
return NULL;
}
idx = pvrdma_idx(&ring->ring_state->prod_tail, ring->max_elems);
/* TODO: tail == idx */
offset = idx * ring->elem_sz;
return ring->pages[offset / TARGET_PAGE_SIZE] + (offset % TARGET_PAGE_SIZE);
}
void pvrdma_ring_write_inc(PvrdmaRing *ring)
{
pvrdma_idx_ring_inc(&ring->ring_state->prod_tail, ring->max_elems);
/*
pr_dbg("%s: t=%d, h=%d, m=%ld\n", ring->name,
ring->ring_state->prod_tail, ring->ring_state->cons_head,
ring->max_elems);
*/
}
void pvrdma_ring_free(PvrdmaRing *ring)
{
if (!ring) {
return;
}
if (!ring->pages) {
return;
}
pr_dbg("ring->npages=%d\n", ring->npages);
while (ring->npages--) {
rdma_pci_dma_unmap(ring->dev, ring->pages[ring->npages],
TARGET_PAGE_SIZE);
}
g_free(ring->pages);
ring->pages = NULL;
}

42
hw/rdma/vmw/pvrdma_dev_ring.h Normal file
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/*
* QEMU VMWARE paravirtual RDMA ring utilities
*
* 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.
*
*/
#ifndef PVRDMA_DEV_RING_H
#define PVRDMA_DEV_RING_H
#include <qemu/typedefs.h>
#define MAX_RING_NAME_SZ 32
typedef struct PvrdmaRing {
char name[MAX_RING_NAME_SZ];
PCIDevice *dev;
uint32_t max_elems;
size_t elem_sz;
struct pvrdma_ring *ring_state; /* used only for unmap */
int npages;
void **pages;
} PvrdmaRing;
int pvrdma_ring_init(PvrdmaRing *ring, const char *name, PCIDevice *dev,
struct pvrdma_ring *ring_state, uint32_t max_elems,
size_t elem_sz, dma_addr_t *tbl, dma_addr_t npages);
void *pvrdma_ring_next_elem_read(PvrdmaRing *ring);
void pvrdma_ring_read_inc(PvrdmaRing *ring);
void *pvrdma_ring_next_elem_write(PvrdmaRing *ring);
void pvrdma_ring_write_inc(PvrdmaRing *ring);
void pvrdma_ring_free(PvrdmaRing *ring);
#endif

222
hw/rdma/vmw/pvrdma_qp_ops.c Normal file
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/*
* QEMU paravirtual RDMA - QP implementation
*
* 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 "../rdma_utils.h"
#include "../rdma_rm.h"
#include "../rdma_backend.h"
#include "pvrdma.h"
#include <standard-headers/rdma/vmw_pvrdma-abi.h>
#include "pvrdma_qp_ops.h"
typedef struct CompHandlerCtx {
PVRDMADev *dev;
uint32_t cq_handle;
struct pvrdma_cqe cqe;
} CompHandlerCtx;
/* Send Queue WQE */
typedef struct PvrdmaSqWqe {
struct pvrdma_sq_wqe_hdr hdr;
struct pvrdma_sge sge[0];
} PvrdmaSqWqe;
/* Recv Queue WQE */
typedef struct PvrdmaRqWqe {
struct pvrdma_rq_wqe_hdr hdr;
struct pvrdma_sge sge[0];
} PvrdmaRqWqe;
/*
* 1. Put CQE on send CQ ring
* 2. Put CQ number on dsr completion ring
* 3. Interrupt host
*/
static int pvrdma_post_cqe(PVRDMADev *dev, uint32_t cq_handle,
struct pvrdma_cqe *cqe)
{
struct pvrdma_cqe *cqe1;
struct pvrdma_cqne *cqne;
PvrdmaRing *ring;
RdmaRmCQ *cq = rdma_rm_get_cq(&dev->rdma_dev_res, cq_handle);
if (unlikely(!cq)) {
pr_dbg("Invalid cqn %d\n", cq_handle);
return -EINVAL;
}
ring = (PvrdmaRing *)cq->opaque;
pr_dbg("ring=%p\n", ring);
/* Step #1: Put CQE on CQ ring */
pr_dbg("Writing CQE\n");
cqe1 = pvrdma_ring_next_elem_write(ring);
if (unlikely(!cqe1)) {
return -EINVAL;
}
cqe1->wr_id = cqe->wr_id;
cqe1->qp = cqe->qp;
cqe1->opcode = cqe->opcode;
cqe1->status = cqe->status;
cqe1->vendor_err = cqe->vendor_err;
pvrdma_ring_write_inc(ring);
/* Step #2: Put CQ number on dsr completion ring */
pr_dbg("Writing CQNE\n");
cqne = pvrdma_ring_next_elem_write(&dev->dsr_info.cq);
if (unlikely(!cqne)) {
return -EINVAL;
}
cqne->info = cq_handle;
pvrdma_ring_write_inc(&dev->dsr_info.cq);
pr_dbg("cq->notify=%d\n", cq->notify);
if (cq->notify) {
cq->notify = false;
post_interrupt(dev, INTR_VEC_CMD_COMPLETION_Q);
}
return 0;
}
static void pvrdma_qp_ops_comp_handler(int status, unsigned int vendor_err,
void *ctx)
{
CompHandlerCtx *comp_ctx = (CompHandlerCtx *)ctx;
pr_dbg("cq_handle=%d\n", comp_ctx->cq_handle);
pr_dbg("wr_id=%ld\n", comp_ctx->cqe.wr_id);
pr_dbg("status=%d\n", status);
pr_dbg("vendor_err=0x%x\n", vendor_err);
comp_ctx->cqe.status = status;
comp_ctx->cqe.vendor_err = vendor_err;
pvrdma_post_cqe(comp_ctx->dev, comp_ctx->cq_handle, &comp_ctx->cqe);
g_free(ctx);
}
void pvrdma_qp_ops_fini(void)
{
rdma_backend_unregister_comp_handler();
}
int pvrdma_qp_ops_init(void)
{
rdma_backend_register_comp_handler(pvrdma_qp_ops_comp_handler);
return 0;
}
int pvrdma_qp_send(PVRDMADev *dev, uint32_t qp_handle)
{
RdmaRmQP *qp;
PvrdmaSqWqe *wqe;
PvrdmaRing *ring;
pr_dbg("qp_handle=%d\n", qp_handle);
qp = rdma_rm_get_qp(&dev->rdma_dev_res, qp_handle);
if (unlikely(!qp)) {
return -EINVAL;
}
ring = (PvrdmaRing *)qp->opaque;
pr_dbg("sring=%p\n", ring);
wqe = (struct PvrdmaSqWqe *)pvrdma_ring_next_elem_read(ring);
while (wqe) {
CompHandlerCtx *comp_ctx;
pr_dbg("wr_id=%ld\n", wqe->hdr.wr_id);
/* Prepare CQE */
comp_ctx = g_malloc(sizeof(CompHandlerCtx));
comp_ctx->dev = dev;
comp_ctx->cq_handle = qp->send_cq_handle;
comp_ctx->cqe.wr_id = wqe->hdr.wr_id;
comp_ctx->cqe.qp = qp_handle;
comp_ctx->cqe.opcode = wqe->hdr.opcode;
rdma_backend_post_send(&dev->backend_dev, &qp->backend_qp, qp->qp_type,
(struct ibv_sge *)&wqe->sge[0], wqe->hdr.num_sge,
(union ibv_gid *)wqe->hdr.wr.ud.av.dgid,
wqe->hdr.wr.ud.remote_qpn,
wqe->hdr.wr.ud.remote_qkey, comp_ctx);
pvrdma_ring_read_inc(ring);
wqe = pvrdma_ring_next_elem_read(ring);
}
return 0;
}
int pvrdma_qp_recv(PVRDMADev *dev, uint32_t qp_handle)
{
RdmaRmQP *qp;
PvrdmaRqWqe *wqe;
PvrdmaRing *ring;
pr_dbg("qp_handle=%d\n", qp_handle);
qp = rdma_rm_get_qp(&dev->rdma_dev_res, qp_handle);
if (unlikely(!qp)) {
return -EINVAL;
}
ring = &((PvrdmaRing *)qp->opaque)[1];
pr_dbg("rring=%p\n", ring);
wqe = (struct PvrdmaRqWqe *)pvrdma_ring_next_elem_read(ring);
while (wqe) {
CompHandlerCtx *comp_ctx;
pr_dbg("wr_id=%ld\n", wqe->hdr.wr_id);
/* Prepare CQE */
comp_ctx = g_malloc(sizeof(CompHandlerCtx));
comp_ctx->dev = dev;
comp_ctx->cq_handle = qp->recv_cq_handle;
comp_ctx->cqe.qp = qp_handle;
comp_ctx->cqe.wr_id = wqe->hdr.wr_id;
rdma_backend_post_recv(&dev->backend_dev, &dev->rdma_dev_res,
&qp->backend_qp, qp->qp_type,
(struct ibv_sge *)&wqe->sge[0], wqe->hdr.num_sge,
comp_ctx);
pvrdma_ring_read_inc(ring);
wqe = pvrdma_ring_next_elem_read(ring);
}
return 0;
}
void pvrdma_cq_poll(RdmaDeviceResources *dev_res, uint32_t cq_handle)
{
RdmaRmCQ *cq;
cq = rdma_rm_get_cq(dev_res, cq_handle);
if (!cq) {
pr_dbg("Invalid CQ# %d\n", cq_handle);
}
rdma_backend_poll_cq(dev_res, &cq->backend_cq);
}

27
hw/rdma/vmw/pvrdma_qp_ops.h Normal file
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/*
* QEMU VMWARE paravirtual RDMA QP Operations
*
* 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.
*
*/
#ifndef PVRDMA_QP_H
#define PVRDMA_QP_H
#include "pvrdma.h"
int pvrdma_qp_ops_init(void);
void pvrdma_qp_ops_fini(void);
int pvrdma_qp_send(PVRDMADev *dev, uint32_t qp_handle);
int pvrdma_qp_recv(PVRDMADev *dev, uint32_t qp_handle);
void pvrdma_cq_poll(RdmaDeviceResources *dev_res, uint32_t cq_handle);
#endif