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-rw-r--r--drivers/ntb/test/ntb_perf.c1820
1 files changed, 1219 insertions, 601 deletions
diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c
index 6f6c602d04af..8de72f3fba4d 100644
--- a/drivers/ntb/test/ntb_perf.c
+++ b/drivers/ntb/test/ntb_perf.c
@@ -5,6 +5,7 @@
* GPL LICENSE SUMMARY
*
* Copyright(c) 2015 Intel Corporation. All rights reserved.
+ * Copyright(c) 2017 T-Platforms. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
@@ -13,6 +14,7 @@
* BSD LICENSE
*
* Copyright(c) 2015 Intel Corporation. All rights reserved.
+ * Copyright(c) 2017 T-Platforms. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -40,859 +42,1475 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
- * PCIe NTB Perf Linux driver
+ * PCIe NTB Perf Linux driver
+ */
+
+/*
+ * How to use this tool, by example.
+ *
+ * Assuming $DBG_DIR is something like:
+ * '/sys/kernel/debug/ntb_perf/0000:00:03.0'
+ * Suppose aside from local device there is at least one remote device
+ * connected to NTB with index 0.
+ *-----------------------------------------------------------------------------
+ * Eg: install driver with specified chunk/total orders and dma-enabled flag
+ *
+ * root@self# insmod ntb_perf.ko chunk_order=19 total_order=28 use_dma
+ *-----------------------------------------------------------------------------
+ * Eg: check NTB ports (index) and MW mapping information
+ *
+ * root@self# cat $DBG_DIR/info
+ *-----------------------------------------------------------------------------
+ * Eg: start performance test with peer (index 0) and get the test metrics
+ *
+ * root@self# echo 0 > $DBG_DIR/run
+ * root@self# cat $DBG_DIR/run
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/kthread.h>
-#include <linux/time.h>
-#include <linux/timer.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
#include <linux/pci.h>
+#include <linux/ktime.h>
#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/debugfs.h>
-#include <linux/dmaengine.h>
#include <linux/delay.h>
#include <linux/sizes.h>
+#include <linux/workqueue.h>
+#include <linux/debugfs.h>
+#include <linux/random.h>
#include <linux/ntb.h>
-#include <linux/mutex.h>
#define DRIVER_NAME "ntb_perf"
-#define DRIVER_DESCRIPTION "PCIe NTB Performance Measurement Tool"
-
-#define DRIVER_VERSION "1.0"
-#define DRIVER_AUTHOR "Dave Jiang <dave.jiang@intel.com>"
-
-#define PERF_LINK_DOWN_TIMEOUT 10
-#define PERF_VERSION 0xffff0001
-#define MAX_THREADS 32
-#define MAX_TEST_SIZE SZ_1M
-#define MAX_SRCS 32
-#define DMA_OUT_RESOURCE_TO msecs_to_jiffies(50)
-#define DMA_RETRIES 20
-#define SZ_4G (1ULL << 32)
-#define MAX_SEG_ORDER 20 /* no larger than 1M for kmalloc buffer */
-#define PIDX NTB_DEF_PEER_IDX
+#define DRIVER_VERSION "2.0"
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(DRIVER_VERSION);
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
+MODULE_AUTHOR("Dave Jiang <dave.jiang@intel.com>");
+MODULE_DESCRIPTION("PCIe NTB Performance Measurement Tool");
+
+#define MAX_THREADS_CNT 32
+#define DEF_THREADS_CNT 1
+#define MAX_CHUNK_SIZE SZ_1M
+#define MAX_CHUNK_ORDER 20 /* no larger than 1M */
+
+#define DMA_TRIES 100
+#define DMA_MDELAY 10
-static struct dentry *perf_debugfs_dir;
+#define MSG_TRIES 500
+#define MSG_UDELAY_LOW 1000
+#define MSG_UDELAY_HIGH 2000
+
+#define PERF_BUF_LEN 1024
static unsigned long max_mw_size;
module_param(max_mw_size, ulong, 0644);
-MODULE_PARM_DESC(max_mw_size, "Limit size of large memory windows");
+MODULE_PARM_DESC(max_mw_size, "Upper limit of memory window size");
-static unsigned int seg_order = 19; /* 512K */
-module_param(seg_order, uint, 0644);
-MODULE_PARM_DESC(seg_order, "size order [2^n] of buffer segment for testing");
+static unsigned char chunk_order = 19; /* 512K */
+module_param(chunk_order, byte, 0644);
+MODULE_PARM_DESC(chunk_order, "Data chunk order [2^n] to transfer");
-static unsigned int run_order = 32; /* 4G */
-module_param(run_order, uint, 0644);
-MODULE_PARM_DESC(run_order, "size order [2^n] of total data to transfer");
+static unsigned char total_order = 30; /* 1G */
+module_param(total_order, byte, 0644);
+MODULE_PARM_DESC(total_order, "Total data order [2^n] to transfer");
static bool use_dma; /* default to 0 */
module_param(use_dma, bool, 0644);
-MODULE_PARM_DESC(use_dma, "Using DMA engine to measure performance");
-
-static bool on_node = true; /* default to 1 */
-module_param(on_node, bool, 0644);
-MODULE_PARM_DESC(on_node, "Run threads only on NTB device node (default: true)");
-
-struct perf_mw {
- phys_addr_t phys_addr;
- resource_size_t phys_size;
- void __iomem *vbase;
- size_t xlat_size;
- size_t buf_size;
- void *virt_addr;
- dma_addr_t dma_addr;
+MODULE_PARM_DESC(use_dma, "Use DMA engine to measure performance");
+
+/*==============================================================================
+ * Perf driver data definition
+ *==============================================================================
+ */
+
+enum perf_cmd {
+ PERF_CMD_INVAL = -1,/* invalid spad command */
+ PERF_CMD_SSIZE = 0, /* send out buffer size */
+ PERF_CMD_RSIZE = 1, /* recv in buffer size */
+ PERF_CMD_SXLAT = 2, /* send in buffer xlat */
+ PERF_CMD_RXLAT = 3, /* recv out buffer xlat */
+ PERF_CMD_CLEAR = 4, /* clear allocated memory */
+ PERF_STS_DONE = 5, /* init is done */
+ PERF_STS_LNKUP = 6, /* link up state flag */
};
struct perf_ctx;
-struct pthr_ctx {
- struct task_struct *thread;
- struct perf_ctx *perf;
- atomic_t dma_sync;
- struct dma_chan *dma_chan;
- int dma_prep_err;
- int src_idx;
- void *srcs[MAX_SRCS];
- wait_queue_head_t *wq;
- int status;
- u64 copied;
- u64 diff_us;
+struct perf_peer {
+ struct perf_ctx *perf;
+ int pidx;
+ int gidx;
+
+ /* Outbound MW params */
+ u64 outbuf_xlat;
+ resource_size_t outbuf_size;
+ void __iomem *outbuf;
+
+ /* Inbound MW params */
+ dma_addr_t inbuf_xlat;
+ resource_size_t inbuf_size;
+ void *inbuf;
+
+ /* NTB connection setup service */
+ struct work_struct service;
+ unsigned long sts;
};
+#define to_peer_service(__work) \
+ container_of(__work, struct perf_peer, service)
-struct perf_ctx {
- struct ntb_dev *ntb;
- spinlock_t db_lock;
- struct perf_mw mw;
- bool link_is_up;
- struct delayed_work link_work;
- wait_queue_head_t link_wq;
- u8 perf_threads;
- /* mutex ensures only one set of threads run at once */
- struct mutex run_mutex;
- struct pthr_ctx pthr_ctx[MAX_THREADS];
- atomic_t tsync;
- atomic_t tdone;
+struct perf_thread {
+ struct perf_ctx *perf;
+ int tidx;
+
+ /* DMA-based test sync parameters */
+ atomic_t dma_sync;
+ wait_queue_head_t dma_wait;
+ struct dma_chan *dma_chan;
+
+ /* Data source and measured statistics */
+ void *src;
+ u64 copied;
+ ktime_t duration;
+ int status;
+ struct work_struct work;
};
+#define to_thread_work(__work) \
+ container_of(__work, struct perf_thread, work)
-enum {
- VERSION = 0,
- MW_SZ_HIGH,
- MW_SZ_LOW,
- MAX_SPAD
+struct perf_ctx {
+ struct ntb_dev *ntb;
+
+ /* Global device index and peers descriptors */
+ int gidx;
+ int pcnt;
+ struct perf_peer *peers;
+
+ /* Performance measuring work-threads interface */
+ unsigned long busy_flag;
+ wait_queue_head_t twait;
+ atomic_t tsync;
+ u8 tcnt;
+ struct perf_peer *test_peer;
+ struct perf_thread threads[MAX_THREADS_CNT];
+
+ /* Scratchpad/Message IO operations */
+ int (*cmd_send)(struct perf_peer *peer, enum perf_cmd cmd, u64 data);
+ int (*cmd_recv)(struct perf_ctx *perf, int *pidx, enum perf_cmd *cmd,
+ u64 *data);
+
+ struct dentry *dbgfs_dir;
};
+/*
+ * Scratchpads-base commands interface
+ */
+#define PERF_SPAD_CNT(_pcnt) \
+ (3*((_pcnt) + 1))
+#define PERF_SPAD_CMD(_gidx) \
+ (3*(_gidx))
+#define PERF_SPAD_LDATA(_gidx) \
+ (3*(_gidx) + 1)
+#define PERF_SPAD_HDATA(_gidx) \
+ (3*(_gidx) + 2)
+#define PERF_SPAD_NOTIFY(_gidx) \
+ (BIT_ULL(_gidx))
+
+/*
+ * Messages-base commands interface
+ */
+#define PERF_MSG_CNT 3
+#define PERF_MSG_CMD 0
+#define PERF_MSG_LDATA 1
+#define PERF_MSG_HDATA 2
+
+/*==============================================================================
+ * Static data declarations
+ *==============================================================================
+ */
+
+static struct dentry *perf_dbgfs_topdir;
+
+static struct workqueue_struct *perf_wq __read_mostly;
+
+/*==============================================================================
+ * NTB cross-link commands execution service
+ *==============================================================================
+ */
+
+static void perf_terminate_test(struct perf_ctx *perf);
+
+static inline bool perf_link_is_up(struct perf_peer *peer)
+{
+ u64 link;
+
+ link = ntb_link_is_up(peer->perf->ntb, NULL, NULL);
+ return !!(link & BIT_ULL_MASK(peer->pidx));
+}
+
+static int perf_spad_cmd_send(struct perf_peer *peer, enum perf_cmd cmd,
+ u64 data)
+{
+ struct perf_ctx *perf = peer->perf;
+ int try;
+ u32 sts;
+
+ dev_dbg(&perf->ntb->dev, "CMD send: %d 0x%llx\n", cmd, data);
+
+ /*
+ * Perform predefined number of attempts before give up.
+ * We are sending the data to the port specific scratchpad, so
+ * to prevent a multi-port access race-condition. Additionally
+ * there is no need in local locking since only thread-safe
+ * service work is using this method.
+ */
+ for (try = 0; try < MSG_TRIES; try++) {
+ if (!perf_link_is_up(peer))
+ return -ENOLINK;
+
+ sts = ntb_peer_spad_read(perf->ntb, peer->pidx,
+ PERF_SPAD_CMD(perf->gidx));
+ if (le32_to_cpu(sts) != PERF_CMD_INVAL) {
+ usleep_range(MSG_UDELAY_LOW, MSG_UDELAY_HIGH);
+ continue;
+ }
+
+ ntb_peer_spad_write(perf->ntb, peer->pidx,
+ PERF_SPAD_LDATA(perf->gidx),
+ cpu_to_le32(lower_32_bits(data)));
+ ntb_peer_spad_write(perf->ntb, peer->pidx,
+ PERF_SPAD_HDATA(perf->gidx),
+ cpu_to_le32(upper_32_bits(data)));
+ mmiowb();
+ ntb_peer_spad_write(perf->ntb, peer->pidx,
+ PERF_SPAD_CMD(perf->gidx),
+ cpu_to_le32(cmd));
+ mmiowb();
+ ntb_peer_db_set(perf->ntb, PERF_SPAD_NOTIFY(peer->gidx));
+
+ dev_dbg(&perf->ntb->dev, "DB ring peer %#llx\n",
+ PERF_SPAD_NOTIFY(peer->gidx));
+
+ break;
+ }
+
+ return try < MSG_TRIES ? 0 : -EAGAIN;
+}
+
+static int perf_spad_cmd_recv(struct perf_ctx *perf, int *pidx,
+ enum perf_cmd *cmd, u64 *data)
+{
+ struct perf_peer *peer;
+ u32 val;
+
+ ntb_db_clear(perf->ntb, PERF_SPAD_NOTIFY(perf->gidx));
+
+ /*
+ * We start scanning all over, since cleared DB may have been set
+ * by any peer. Yes, it makes peer with smaller index being
+ * serviced with greater priority, but it's convenient for spad
+ * and message code unification and simplicity.
+ */
+ for (*pidx = 0; *pidx < perf->pcnt; (*pidx)++) {
+ peer = &perf->peers[*pidx];
+
+ if (!perf_link_is_up(peer))
+ continue;
+
+ val = ntb_spad_read(perf->ntb, PERF_SPAD_CMD(peer->gidx));
+ val = le32_to_cpu(val);
+ if (val == PERF_CMD_INVAL)
+ continue;
+
+ *cmd = val;
+
+ val = ntb_spad_read(perf->ntb, PERF_SPAD_LDATA(peer->gidx));
+ *data = le32_to_cpu(val);
+
+ val = ntb_spad_read(perf->ntb, PERF_SPAD_HDATA(peer->gidx));
+ *data |= (u64)le32_to_cpu(val) << 32;
+
+ /* Next command can be retrieved from now */
+ ntb_spad_write(perf->ntb, PERF_SPAD_CMD(peer->gidx),
+ cpu_to_le32(PERF_CMD_INVAL));
+
+ dev_dbg(&perf->ntb->dev, "CMD recv: %d 0x%llx\n", *cmd, *data);
+
+ return 0;
+ }
+
+ return -ENODATA;
+}
+
+static int perf_msg_cmd_send(struct perf_peer *peer, enum perf_cmd cmd,
+ u64 data)
+{
+ struct perf_ctx *perf = peer->perf;
+ int try, ret;
+ u64 outbits;
+
+ dev_dbg(&perf->ntb->dev, "CMD send: %d 0x%llx\n", cmd, data);
+
+ /*
+ * Perform predefined number of attempts before give up. Message
+ * registers are free of race-condition problem when accessed
+ * from different ports, so we don't need splitting registers
+ * by global device index. We also won't have local locking,
+ * since the method is used from service work only.
+ */
+ outbits = ntb_msg_outbits(perf->ntb);
+ for (try = 0; try < MSG_TRIES; try++) {
+ if (!perf_link_is_up(peer))
+ return -ENOLINK;
+
+ ret = ntb_msg_clear_sts(perf->ntb, outbits);
+ if (ret)
+ return ret;
+
+ ntb_peer_msg_write(perf->ntb, peer->pidx, PERF_MSG_LDATA,
+ cpu_to_le32(lower_32_bits(data)));
+
+ if (ntb_msg_read_sts(perf->ntb) & outbits) {
+ usleep_range(MSG_UDELAY_LOW, MSG_UDELAY_HIGH);
+ continue;
+ }
+
+ ntb_peer_msg_write(perf->ntb, peer->pidx, PERF_MSG_HDATA,
+ cpu_to_le32(upper_32_bits(data)));
+ mmiowb();
+
+ /* This call shall trigger peer message event */
+ ntb_peer_msg_write(perf->ntb, peer->pidx, PERF_MSG_CMD,
+ cpu_to_le32(cmd));
+
+ break;
+ }
+
+ return try < MSG_TRIES ? 0 : -EAGAIN;
+}
+
+static int perf_msg_cmd_recv(struct perf_ctx *perf, int *pidx,
+ enum perf_cmd *cmd, u64 *data)
+{
+ u64 inbits;
+ u32 val;
+
+ inbits = ntb_msg_inbits(perf->ntb);
+
+ if (hweight64(ntb_msg_read_sts(perf->ntb) & inbits) < 3)
+ return -ENODATA;
+
+ val = ntb_msg_read(perf->ntb, pidx, PERF_MSG_CMD);
+ *cmd = le32_to_cpu(val);
+
+ val = ntb_msg_read(perf->ntb, pidx, PERF_MSG_LDATA);
+ *data = le32_to_cpu(val);
+
+ val = ntb_msg_read(perf->ntb, pidx, PERF_MSG_HDATA);
+ *data |= (u64)le32_to_cpu(val) << 32;
+
+ /* Next command can be retrieved from now */
+ ntb_msg_clear_sts(perf->ntb, inbits);
+
+ dev_dbg(&perf->ntb->dev, "CMD recv: %d 0x%llx\n", *cmd, *data);
+
+ return 0;
+}
+
+static int perf_cmd_send(struct perf_peer *peer, enum perf_cmd cmd, u64 data)
+{
+ struct perf_ctx *perf = peer->perf;
+
+ if (cmd == PERF_CMD_SSIZE || cmd == PERF_CMD_SXLAT)
+ return perf->cmd_send(peer, cmd, data);
+
+ dev_err(&perf->ntb->dev, "Send invalid command\n");
+ return -EINVAL;
+}
+
+static int perf_cmd_exec(struct perf_peer *peer, enum perf_cmd cmd)
+{
+ switch (cmd) {
+ case PERF_CMD_SSIZE:
+ case PERF_CMD_RSIZE:
+ case PERF_CMD_SXLAT:
+ case PERF_CMD_RXLAT:
+ case PERF_CMD_CLEAR:
+ break;
+ default:
+ dev_err(&peer->perf->ntb->dev, "Exec invalid command\n");
+ return -EINVAL;
+ }
+
+ /* No need of memory barrier, since bit ops have invernal lock */
+ set_bit(cmd, &peer->sts);
+
+ dev_dbg(&peer->perf->ntb->dev, "CMD exec: %d\n", cmd);
+
+ (void)queue_work(system_highpri_wq, &peer->service);
+
+ return 0;
+}
+
+static int perf_cmd_recv(struct perf_ctx *perf)
+{
+ struct perf_peer *peer;
+ int ret, pidx, cmd;
+ u64 data;
+
+ while (!(ret = perf->cmd_recv(perf, &pidx, &cmd, &data))) {
+ peer = &perf->peers[pidx];
+
+ switch (cmd) {
+ case PERF_CMD_SSIZE:
+ peer->inbuf_size = data;
+ return perf_cmd_exec(peer, PERF_CMD_RSIZE);
+ case PERF_CMD_SXLAT:
+ peer->outbuf_xlat = data;
+ return perf_cmd_exec(peer, PERF_CMD_RXLAT);
+ default:
+ dev_err(&perf->ntb->dev, "Recv invalid command\n");
+ return -EINVAL;
+ }
+ }
+
+ /* Return 0 if no data left to process, otherwise an error */
+ return ret == -ENODATA ? 0 : ret;
+}
+
static void perf_link_event(void *ctx)
{
struct perf_ctx *perf = ctx;
+ struct perf_peer *peer;
+ bool lnk_up;
+ int pidx;
- if (ntb_link_is_up(perf->ntb, NULL, NULL) == 1) {
- schedule_delayed_work(&perf->link_work, 2*HZ);
- } else {
- dev_dbg(&perf->ntb->pdev->dev, "link down\n");
+ for (pidx = 0; pidx < perf->pcnt; pidx++) {
+ peer = &perf->peers[pidx];
- if (!perf->link_is_up)
- cancel_delayed_work_sync(&perf->link_work);
+ lnk_up = perf_link_is_up(peer);
- perf->link_is_up = false;
+ if (lnk_up &&
+ !test_and_set_bit(PERF_STS_LNKUP, &peer->sts)) {
+ perf_cmd_exec(peer, PERF_CMD_SSIZE);
+ } else if (!lnk_up &&
+ test_and_clear_bit(PERF_STS_LNKUP, &peer->sts)) {
+ perf_cmd_exec(peer, PERF_CMD_CLEAR);
+ }
}
}
static void perf_db_event(void *ctx, int vec)
{
struct perf_ctx *perf = ctx;
- u64 db_bits, db_mask;
- db_mask = ntb_db_vector_mask(perf->ntb, vec);
- db_bits = ntb_db_read(perf->ntb);
+ dev_dbg(&perf->ntb->dev, "DB vec %d mask %#llx bits %#llx\n", vec,
+ ntb_db_vector_mask(perf->ntb, vec), ntb_db_read(perf->ntb));
+
+ /* Just receive all available commands */
+ (void)perf_cmd_recv(perf);
+}
+
+static void perf_msg_event(void *ctx)
+{
+ struct perf_ctx *perf = ctx;
+
+ dev_dbg(&perf->ntb->dev, "Msg status bits %#llx\n",
+ ntb_msg_read_sts(perf->ntb));
- dev_dbg(&perf->ntb->dev, "doorbell vec %d mask %#llx bits %#llx\n",
- vec, db_mask, db_bits);
+ /* Messages are only sent one-by-one */
+ (void)perf_cmd_recv(perf);
}
static const struct ntb_ctx_ops perf_ops = {
.link_event = perf_link_event,
.db_event = perf_db_event,
+ .msg_event = perf_msg_event
};
-static void perf_copy_callback(void *data)
+static void perf_free_outbuf(struct perf_peer *peer)
+{
+ (void)ntb_peer_mw_clear_trans(peer->perf->ntb, peer->pidx, peer->gidx);
+}
+
+static int perf_setup_outbuf(struct perf_peer *peer)
{
- struct pthr_ctx *pctx = data;
+ struct perf_ctx *perf = peer->perf;
+ int ret;
+
+ /* Outbuf size can be unaligned due to custom max_mw_size */
+ ret = ntb_peer_mw_set_trans(perf->ntb, peer->pidx, peer->gidx,
+ peer->outbuf_xlat, peer->outbuf_size);
+ if (ret) {
+ dev_err(&perf->ntb->dev, "Failed to set outbuf translation\n");
+ return ret;
+ }
+
+ /* Initialization is finally done */
+ set_bit(PERF_STS_DONE, &peer->sts);
- atomic_dec(&pctx->dma_sync);
+ return 0;
}
-static ssize_t perf_copy(struct pthr_ctx *pctx, char __iomem *dst,
- char *src, size_t size)
+static void perf_free_inbuf(struct perf_peer *peer)
{
- struct perf_ctx *perf = pctx->perf;
- struct dma_async_tx_descriptor *txd;
- struct dma_chan *chan = pctx->dma_chan;
- struct dma_device *device;
- struct dmaengine_unmap_data *unmap;
- dma_cookie_t cookie;
- size_t src_off, dst_off;
- struct perf_mw *mw = &perf->mw;
- void __iomem *vbase;
- void __iomem *dst_vaddr;
- dma_addr_t dst_phys;
- int retries = 0;
+ if (!peer->inbuf)
+ return;
- if (!use_dma) {
- memcpy_toio(dst, src, size);
- return size;
+ (void)ntb_mw_clear_trans(peer->perf->ntb, peer->pidx, peer->gidx);
+ dma_free_coherent(&peer->perf->ntb->dev, peer->inbuf_size,
+ peer->inbuf, peer->inbuf_xlat);
+ peer->inbuf = NULL;
+}
+
+static int perf_setup_inbuf(struct perf_peer *peer)
+{
+ resource_size_t xlat_align, size_align, size_max;
+ struct perf_ctx *perf = peer->perf;
+ int ret;
+
+ /* Get inbound MW parameters */
+ ret = ntb_mw_get_align(perf->ntb, peer->pidx, perf->gidx,
+ &xlat_align, &size_align, &size_max);
+ if (ret) {
+ dev_err(&perf->ntb->dev, "Couldn't get inbuf restrictions\n");
+ return ret;
}
- if (!chan) {
- dev_err(&perf->ntb->dev, "DMA engine does not exist\n");
+ if (peer->inbuf_size > size_max) {
+ dev_err(&perf->ntb->dev, "Too big inbuf size %pa > %pa\n",
+ &peer->inbuf_size, &size_max);
return -EINVAL;
}
- device = chan->device;
- src_off = (uintptr_t)src & ~PAGE_MASK;
- dst_off = (uintptr_t __force)dst & ~PAGE_MASK;
+ peer->inbuf_size = round_up(peer->inbuf_size, size_align);
- if (!is_dma_copy_aligned(device, src_off, dst_off, size))
- return -ENODEV;
-
- vbase = mw->vbase;
- dst_vaddr = dst;
- dst_phys = mw->phys_addr + (dst_vaddr - vbase);
+ perf_free_inbuf(peer);
- unmap = dmaengine_get_unmap_data(device->dev, 1, GFP_NOWAIT);
- if (!unmap)
+ peer->inbuf = dma_alloc_coherent(&perf->ntb->dev, peer->inbuf_size,
+ &peer->inbuf_xlat, GFP_KERNEL);
+ if (!peer->inbuf) {
+ dev_err(&perf->ntb->dev, "Failed to alloc inbuf of %pa\n",
+ &peer->inbuf_size);
return -ENOMEM;
+ }
+ if (!IS_ALIGNED(peer->inbuf_xlat, xlat_align)) {
+ dev_err(&perf->ntb->dev, "Unaligned inbuf allocated\n");
+ goto err_free_inbuf;
+ }
- unmap->len = size;
- unmap->addr[0] = dma_map_page(device->dev, virt_to_page(src),
- src_off, size, DMA_TO_DEVICE);
- if (dma_mapping_error(device->dev, unmap->addr[0]))
- goto err_get_unmap;
+ ret = ntb_mw_set_trans(perf->ntb, peer->pidx, peer->gidx,
+ peer->inbuf_xlat, peer->inbuf_size);
+ if (ret) {
+ dev_err(&perf->ntb->dev, "Failed to set inbuf translation\n");
+ goto err_free_inbuf;
+ }
- unmap->to_cnt = 1;
+ /*
+ * We submit inbuf xlat transmission cmd for execution here to follow
+ * the code architecture, even though this method is called from service
+ * work itself so the command will be executed right after it returns.
+ */
+ (void)perf_cmd_exec(peer, PERF_CMD_SXLAT);
- do {
- txd = device->device_prep_dma_memcpy(chan, dst_phys,
- unmap->addr[0],
- size, DMA_PREP_INTERRUPT);
- if (!txd) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(DMA_OUT_RESOURCE_TO);
- }
- } while (!txd && (++retries < DMA_RETRIES));
+ return 0;
- if (!txd) {
- pctx->dma_prep_err++;
- goto err_get_unmap;
- }
+err_free_inbuf:
+ perf_free_inbuf(peer);
- txd->callback = perf_copy_callback;
- txd->callback_param = pctx;
- dma_set_unmap(txd, unmap);
+ return ret;
+}
- cookie = dmaengine_submit(txd);
- if (dma_submit_error(cookie))
- goto err_set_unmap;
+static void perf_service_work(struct work_struct *work)
+{
+ struct perf_peer *peer = to_peer_service(work);
- dmaengine_unmap_put(unmap);
+ if (test_and_clear_bit(PERF_CMD_SSIZE, &peer->sts))
+ perf_cmd_send(peer, PERF_CMD_SSIZE, peer->outbuf_size);
- atomic_inc(&pctx->dma_sync);
- dma_async_issue_pending(chan);
+ if (test_and_clear_bit(PERF_CMD_RSIZE, &peer->sts))
+ perf_setup_inbuf(peer);
- return size;
+ if (test_and_clear_bit(PERF_CMD_SXLAT, &peer->sts))
+ perf_cmd_send(peer, PERF_CMD_SXLAT, peer->inbuf_xlat);
-err_set_unmap:
- dmaengine_unmap_put(unmap);
-err_get_unmap:
- dmaengine_unmap_put(unmap);
- return 0;
-}
+ if (test_and_clear_bit(PERF_CMD_RXLAT, &peer->sts))
+ perf_setup_outbuf(peer);
-static int perf_move_data(struct pthr_ctx *pctx, char __iomem *dst, char *src,
- u64 buf_size, u64 win_size, u64 total)
-{
- int chunks, total_chunks, i;
- int copied_chunks = 0;
- u64 copied = 0, result;
- char __iomem *tmp = dst;
- u64 perf, diff_us;
- ktime_t kstart, kstop, kdiff;
- unsigned long last_sleep = jiffies;
-
- chunks = div64_u64(win_size, buf_size);
- total_chunks = div64_u64(total, buf_size);
- kstart = ktime_get();
-
- for (i = 0; i < total_chunks; i++) {
- result = perf_copy(pctx, tmp, src, buf_size);
- copied += result;
- copied_chunks++;
- if (copied_chunks == chunks) {
- tmp = dst;
- copied_chunks = 0;
- } else
- tmp += buf_size;
-
- /* Probably should schedule every 5s to prevent soft hang. */
- if (unlikely((jiffies - last_sleep) > 5 * HZ)) {
- last_sleep = jiffies;
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(1);
+ if (test_and_clear_bit(PERF_CMD_CLEAR, &peer->sts)) {
+ clear_bit(PERF_STS_DONE, &peer->sts);
+ if (test_bit(0, &peer->perf->busy_flag) &&
+ peer == peer->perf->test_peer) {
+ dev_warn(&peer->perf->ntb->dev,
+ "Freeing while test on-fly\n");
+ perf_terminate_test(peer->perf);
}
+ perf_free_outbuf(peer);
+ perf_free_inbuf(peer);
+ }
+}
- if (unlikely(kthread_should_stop()))
- break;
+static int perf_init_service(struct perf_ctx *perf)
+{
+ u64 mask;
+
+ if (ntb_peer_mw_count(perf->ntb) < perf->pcnt + 1) {
+ dev_err(&perf->ntb->dev, "Not enough memory windows\n");
+ return -EINVAL;
}
- if (use_dma) {
- pr_debug("%s: All DMA descriptors submitted\n", current->comm);
- while (atomic_read(&pctx->dma_sync) != 0) {
- if (kthread_should_stop())
- break;
- msleep(20);
- }
+ if (ntb_msg_count(perf->ntb) >= PERF_MSG_CNT) {
+ perf->cmd_send = perf_msg_cmd_send;
+ perf->cmd_recv = perf_msg_cmd_recv;
+
+ dev_dbg(&perf->ntb->dev, "Message service initialized\n");
+
+ return 0;
}
- kstop = ktime_get();
- kdiff = ktime_sub(kstop, kstart);
- diff_us = ktime_to_us(kdiff);
+ dev_dbg(&perf->ntb->dev, "Message service unsupported\n");
- pr_debug("%s: copied %llu bytes\n", current->comm, copied);
+ mask = GENMASK_ULL(perf->pcnt, 0);
+ if (ntb_spad_count(perf->ntb) >= PERF_SPAD_CNT(perf->pcnt) &&
+ (ntb_db_valid_mask(perf->ntb) & mask) == mask) {
+ perf->cmd_send = perf_spad_cmd_send;
+ perf->cmd_recv = perf_spad_cmd_recv;
- pr_debug("%s: lasted %llu usecs\n", current->comm, diff_us);
+ dev_dbg(&perf->ntb->dev, "Scratchpad service initialized\n");
- perf = div64_u64(copied, diff_us);
+ return 0;
+ }
- pr_debug("%s: MBytes/s: %llu\n", current->comm, perf);
+ dev_dbg(&perf->ntb->dev, "Scratchpad service unsupported\n");
- pctx->copied = copied;
- pctx->diff_us = diff_us;
+ dev_err(&perf->ntb->dev, "Command services unsupported\n");
- return 0;
+ return -EINVAL;
}
-static bool perf_dma_filter_fn(struct dma_chan *chan, void *node)
+static int perf_enable_service(struct perf_ctx *perf)
{
- /* Is the channel required to be on the same node as the device? */
- if (!on_node)
- return true;
+ u64 mask, incmd_bit;
+ int ret, sidx, scnt;
- return dev_to_node(&chan->dev->device) == (int)(unsigned long)node;
-}
+ mask = ntb_db_valid_mask(perf->ntb);
+ (void)ntb_db_set_mask(perf->ntb, mask);
-static int ntb_perf_thread(void *data)
-{
- struct pthr_ctx *pctx = data;
- struct perf_ctx *perf = pctx->perf;
- struct pci_dev *pdev = perf->ntb->pdev;
- struct perf_mw *mw = &perf->mw;
- char __iomem *dst;
- u64 win_size, buf_size, total;
- void *src;
- int rc, node, i;
- struct dma_chan *dma_chan = NULL;
+ ret = ntb_set_ctx(perf->ntb, perf, &perf_ops);
+ if (ret)
+ return ret;
- pr_debug("kthread %s starting...\n", current->comm);
+ if (perf->cmd_send == perf_msg_cmd_send) {
+ u64 inbits, outbits;
- node = on_node ? dev_to_node(&pdev->dev) : NUMA_NO_NODE;
+ inbits = ntb_msg_inbits(perf->ntb);
+ outbits = ntb_msg_outbits(perf->ntb);
+ (void)ntb_msg_set_mask(perf->ntb, inbits | outbits);
- if (use_dma && !pctx->dma_chan) {
- dma_cap_mask_t dma_mask;
+ incmd_bit = BIT_ULL(__ffs64(inbits));
+ ret = ntb_msg_clear_mask(perf->ntb, incmd_bit);
- dma_cap_zero(dma_mask);
- dma_cap_set(DMA_MEMCPY, dma_mask);
- dma_chan = dma_request_channel(dma_mask, perf_dma_filter_fn,
- (void *)(unsigned long)node);
- if (!dma_chan) {
- pr_warn("%s: cannot acquire DMA channel, quitting\n",
- current->comm);
- return -ENODEV;
- }
- pctx->dma_chan = dma_chan;
+ dev_dbg(&perf->ntb->dev, "MSG sts unmasked %#llx\n", incmd_bit);
+ } else {
+ scnt = ntb_spad_count(perf->ntb);
+ for (sidx = 0; sidx < scnt; sidx++)
+ ntb_spad_write(perf->ntb, sidx, PERF_CMD_INVAL);
+ incmd_bit = PERF_SPAD_NOTIFY(perf->gidx);
+ ret = ntb_db_clear_mask(perf->ntb, incmd_bit);
+
+ dev_dbg(&perf->ntb->dev, "DB bits unmasked %#llx\n", incmd_bit);
+ }
+ if (ret) {
+ ntb_clear_ctx(perf->ntb);
+ return ret;
}
- for (i = 0; i < MAX_SRCS; i++) {
- pctx->srcs[i] = kmalloc_node(MAX_TEST_SIZE, GFP_KERNEL, node);
- if (!pctx->srcs[i]) {
- rc = -ENOMEM;
- goto err;
- }
+ ntb_link_enable(perf->ntb, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);
+ /* Might be not necessary */
+ ntb_link_event(perf->ntb);
+
+ return 0;
+}
+
+static void perf_disable_service(struct perf_ctx *perf)
+{
+ int pidx;
+
+ ntb_link_disable(perf->ntb);
+
+ if (perf->cmd_send == perf_msg_cmd_send) {
+ u64 inbits;
+
+ inbits = ntb_msg_inbits(perf->ntb);
+ (void)ntb_msg_set_mask(perf->ntb, inbits);
+ } else {
+ (void)ntb_db_set_mask(perf->ntb, PERF_SPAD_NOTIFY(perf->gidx));
}
- win_size = mw->phys_size;
- buf_size = 1ULL << seg_order;
- total = 1ULL << run_order;
+ ntb_clear_ctx(perf->ntb);
- if (buf_size > MAX_TEST_SIZE)
- buf_size = MAX_TEST_SIZE;
+ for (pidx = 0; pidx < perf->pcnt; pidx++)
+ perf_cmd_exec(&perf->peers[pidx], PERF_CMD_CLEAR);
- dst = (char __iomem *)mw->vbase;
+ for (pidx = 0; pidx < perf->pcnt; pidx++)
+ flush_work(&perf->peers[pidx].service);
+}
- atomic_inc(&perf->tsync);
- while (atomic_read(&perf->tsync) != perf->perf_threads)
- schedule();
+/*==============================================================================
+ * Performance measuring work-thread
+ *==============================================================================
+ */
- src = pctx->srcs[pctx->src_idx];
- pctx->src_idx = (pctx->src_idx + 1) & (MAX_SRCS - 1);
+static void perf_dma_copy_callback(void *data)
+{
+ struct perf_thread *pthr = data;
- rc = perf_move_data(pctx, dst, src, buf_size, win_size, total);
+ atomic_dec(&pthr->dma_sync);
+ wake_up(&pthr->dma_wait);
+}
- atomic_dec(&perf->tsync);
+static int perf_copy_chunk(struct perf_thread *pthr,
+ void __iomem *dst, void *src, size_t len)
+{
+ struct dma_async_tx_descriptor *tx;
+ struct dmaengine_unmap_data *unmap;
+ struct device *dma_dev;
+ int try = 0, ret = 0;
- if (rc < 0) {
- pr_err("%s: failed\n", current->comm);
- rc = -ENXIO;
- goto err;
+ if (!use_dma) {
+ memcpy_toio(dst, src, len);
+ goto ret_check_tsync;
}
- for (i = 0; i < MAX_SRCS; i++) {
- kfree(pctx->srcs[i]);
- pctx->srcs[i] = NULL;
+ dma_dev = pthr->dma_chan->device->dev;
+
+ if (!is_dma_copy_aligned(pthr->dma_chan->device, offset_in_page(src),
+ offset_in_page(dst), len))
+ return -EIO;
+
+ unmap = dmaengine_get_unmap_data(dma_dev, 2, GFP_NOWAIT);
+ if (!unmap)
+ return -ENOMEM;
+
+ unmap->len = len;
+ unmap->addr[0] = dma_map_page(dma_dev, virt_to_page(src),
+ offset_in_page(src), len, DMA_TO_DEVICE);
+ if (dma_mapping_error(dma_dev, unmap->addr[0])) {
+ ret = -EIO;
+ goto err_free_resource;
}
+ unmap->to_cnt = 1;
- atomic_inc(&perf->tdone);
- wake_up(pctx->wq);
- rc = 0;
- goto done;
+ unmap->addr[1] = dma_map_page(dma_dev, virt_to_page(dst),
+ offset_in_page(dst), len, DMA_FROM_DEVICE);
+ if (dma_mapping_error(dma_dev, unmap->addr[1])) {
+ ret = -EIO;
+ goto err_free_resource;
+ }
+ unmap->from_cnt = 1;
-err:
- for (i = 0; i < MAX_SRCS; i++) {
- kfree(pctx->srcs[i]);
- pctx->srcs[i] = NULL;
+ do {
+ tx = dmaengine_prep_dma_memcpy(pthr->dma_chan, unmap->addr[1],
+ unmap->addr[0], len, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ if (!tx)
+ msleep(DMA_MDELAY);
+ } while (!tx && (try++ < DMA_TRIES));
+
+ if (!tx) {
+ ret = -EIO;
+ goto err_free_resource;
}
- if (dma_chan) {
- dma_release_channel(dma_chan);
- pctx->dma_chan = NULL;
+ tx->callback = perf_dma_copy_callback;
+ tx->callback_param = pthr;
+ dma_set_unmap(tx, unmap);
+
+ if (dma_submit_error(dmaengine_submit(tx))) {
+ dmaengine_unmap_put(unmap);
+ goto err_free_resource;
}
-done:
- /* Wait until we are told to stop */
- for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (kthread_should_stop())
- break;
- schedule();
+ dmaengine_unmap_put(unmap);
+
+ atomic_inc(&pthr->dma_sync);
+ dma_async_issue_pending(pthr->dma_chan);
+
+ret_check_tsync:
+ return likely(atomic_read(&pthr->perf->tsync) > 0) ? 0 : -EINTR;
+
+err_free_resource:
+ dmaengine_unmap_put(unmap);
+
+ return ret;
+}
+
+static bool perf_dma_filter(struct dma_chan *chan, void *data)
+{
+ struct perf_ctx *perf = data;
+ int node;
+
+ node = dev_to_node(&perf->ntb->dev);
+
+ return node == NUMA_NO_NODE || node == dev_to_node(chan->device->dev);
+}
+
+static int perf_init_test(struct perf_thread *pthr)
+{
+ struct perf_ctx *perf = pthr->perf;
+ dma_cap_mask_t dma_mask;
+
+ pthr->src = kmalloc_node(perf->test_peer->outbuf_size, GFP_KERNEL,
+ dev_to_node(&perf->ntb->dev));
+ if (!pthr->src)
+ return -ENOMEM;
+
+ get_random_bytes(pthr->src, perf->test_peer->outbuf_size);
+
+ if (!use_dma)
+ return 0;
+
+ dma_cap_zero(dma_mask);
+ dma_cap_set(DMA_MEMCPY, dma_mask);
+ pthr->dma_chan = dma_request_channel(dma_mask, perf_dma_filter, perf);
+ if (!pthr->dma_chan) {
+ dev_err(&perf->ntb->dev, "%d: Failed to get DMA channel\n",
+ pthr->tidx);
+ atomic_dec(&perf->tsync);
+ wake_up(&perf->twait);
+ kfree(pthr->src);
+ return -ENODEV;
}
- __set_current_state(TASK_RUNNING);
- return rc;
+ atomic_set(&pthr->dma_sync, 0);
+
+ return 0;
}
-static void perf_free_mw(struct perf_ctx *perf)
+static int perf_run_test(struct perf_thread *pthr)
{
- struct perf_mw *mw = &perf->mw;
- struct pci_dev *pdev = perf->ntb->pdev;
+ struct perf_peer *peer = pthr->perf->test_peer;
+ struct perf_ctx *perf = pthr->perf;
+ void __iomem *flt_dst, *bnd_dst;
+ u64 total_size, chunk_size;
+ void *flt_src;
+ int ret = 0;
+
+ total_size = 1ULL << total_order;
+ chunk_size = 1ULL << chunk_order;
+ chunk_size = min_t(u64, peer->outbuf_size, chunk_size);
+
+ flt_src = pthr->src;
+ bnd_dst = peer->outbuf + peer->outbuf_size;
+ flt_dst = peer->outbuf;
+
+ pthr->duration = ktime_get();
+
+ /* Copied field is cleared on test launch stage */
+ while (pthr->copied < total_size) {
+ ret = perf_copy_chunk(pthr, flt_dst, flt_src, chunk_size);
+ if (ret) {
+ dev_err(&perf->ntb->dev, "%d: Got error %d on test\n",
+ pthr->tidx, ret);
+ return ret;
+ }
- if (!mw->virt_addr)
- return;
+ pthr->copied += chunk_size;
+
+ flt_dst += chunk_size;
+ flt_src += chunk_size;
+ if (flt_dst >= bnd_dst || flt_dst < peer->outbuf) {
+ flt_dst = peer->outbuf;
+ flt_src = pthr->src;
+ }
- ntb_mw_clear_trans(perf->ntb, PIDX, 0);
- dma_free_coherent(&pdev->dev, mw->buf_size,
- mw->virt_addr, mw->dma_addr);
- mw->xlat_size = 0;
- mw->buf_size = 0;
- mw->virt_addr = NULL;
+ /* Give up CPU to give a chance for other threads to use it */
+ schedule();
+ }
+
+ return 0;
}
-static int perf_set_mw(struct perf_ctx *perf, resource_size_t size)
+static int perf_sync_test(struct perf_thread *pthr)
{
- struct perf_mw *mw = &perf->mw;
- size_t xlat_size, buf_size;
- resource_size_t xlat_align;
- resource_size_t xlat_align_size;
- int rc;
+ struct perf_ctx *perf = pthr->perf;
- if (!size)
- return -EINVAL;
+ if (!use_dma)
+ goto no_dma_ret;
- rc = ntb_mw_get_align(perf->ntb, PIDX, 0, &xlat_align,
- &xlat_align_size, NULL);
- if (rc)
- return rc;
+ wait_event(pthr->dma_wait,
+ (atomic_read(&pthr->dma_sync) == 0 ||
+ atomic_read(&perf->tsync) < 0));
- xlat_size = round_up(size, xlat_align_size);
- buf_size = round_up(size, xlat_align);
+ if (atomic_read(&perf->tsync) < 0)
+ return -EINTR;
- if (mw->xlat_size == xlat_size)
- return 0;
+no_dma_ret:
+ pthr->duration = ktime_sub(ktime_get(), pthr->duration);
- if (mw->buf_size)
- perf_free_mw(perf);
+ dev_dbg(&perf->ntb->dev, "%d: copied %llu bytes\n",
+ pthr->tidx, pthr->copied);
- mw->xlat_size = xlat_size;
- mw->buf_size = buf_size;
+ dev_dbg(&perf->ntb->dev, "%d: lasted %llu usecs\n",
+ pthr->tidx, ktime_to_us(pthr->duration));
+
+ dev_dbg(&perf->ntb->dev, "%d: %llu MBytes/s\n", pthr->tidx,
+ div64_u64(pthr->copied, ktime_to_us(pthr->duration)));
+
+ return 0;
+}
+
+static void perf_clear_test(struct perf_thread *pthr)
+{
+ struct perf_ctx *perf = pthr->perf;
+
+ if (!use_dma)
+ goto no_dma_notify;
+
+ /*
+ * If test finished without errors, termination isn't needed.
+ * We call it anyway just to be sure of the transfers completion.
+ */
+ (void)dmaengine_terminate_sync(pthr->dma_chan);
+
+ dma_release_channel(pthr->dma_chan);
+
+no_dma_notify:
+ atomic_dec(&perf->tsync);
+ wake_up(&perf->twait);
+ kfree(pthr->src);
+}
- mw->virt_addr = dma_alloc_coherent(&perf->ntb->pdev->dev, buf_size,
- &mw->dma_addr, GFP_KERNEL);
- if (!mw->virt_addr) {
- mw->xlat_size = 0;
- mw->buf_size = 0;
+static void perf_thread_work(struct work_struct *work)
+{
+ struct perf_thread *pthr = to_thread_work(work);
+ int ret;
+
+ /*
+ * Perform stages in compliance with use_dma flag value.
+ * Test status is changed only if error happened, otherwise
+ * status -ENODATA is kept while test is on-fly. Results
+ * synchronization is performed only if test fininshed
+ * without an error or interruption.
+ */
+ ret = perf_init_test(pthr);
+ if (ret) {
+ pthr->status = ret;
+ return;
}
- rc = ntb_mw_set_trans(perf->ntb, PIDX, 0, mw->dma_addr, mw->xlat_size);
- if (rc) {
- dev_err(&perf->ntb->dev, "Unable to set mw0 translation\n");
- perf_free_mw(perf);
- return -EIO;
+ ret = perf_run_test(pthr);
+ if (ret) {
+ pthr->status = ret;
+ goto err_clear_test;
}
- return 0;
+ pthr->status = perf_sync_test(pthr);
+
+err_clear_test:
+ perf_clear_test(pthr);
}
-static void perf_link_work(struct work_struct *work)
+static int perf_set_tcnt(struct perf_ctx *perf, u8 tcnt)
{
- struct perf_ctx *perf =
- container_of(work, struct perf_ctx, link_work.work);
- struct ntb_dev *ndev = perf->ntb;
- struct pci_dev *pdev = ndev->pdev;
- u32 val;
- u64 size;
- int rc;
+ if (tcnt == 0 || tcnt > MAX_THREADS_CNT)
+ return -EINVAL;
- dev_dbg(&perf->ntb->pdev->dev, "%s called\n", __func__);
+ if (test_and_set_bit_lock(0, &perf->busy_flag))
+ return -EBUSY;
+
+ perf->tcnt = tcnt;
+
+ clear_bit_unlock(0, &perf->busy_flag);
- size = perf->mw.phys_size;
+ return 0;
+}
- if (max_mw_size && size > max_mw_size)
- size = max_mw_size;
+static void perf_terminate_test(struct perf_ctx *perf)
+{
+ int tidx;
- ntb_peer_spad_write(ndev, PIDX, MW_SZ_HIGH, upper_32_bits(size));
- ntb_peer_spad_write(ndev, PIDX, MW_SZ_LOW, lower_32_bits(size));
- ntb_peer_spad_write(ndev, PIDX, VERSION, PERF_VERSION);
+ atomic_set(&perf->tsync, -1);
+ wake_up(&perf->twait);
- /* now read what peer wrote */
- val = ntb_spad_read(ndev, VERSION);
- if (val != PERF_VERSION) {
- dev_dbg(&pdev->dev, "Remote version = %#x\n", val);
- goto out;
+ for (tidx = 0; tidx < MAX_THREADS_CNT; tidx++) {
+ wake_up(&perf->threads[tidx].dma_wait);
+ cancel_work_sync(&perf->threads[tidx].work);
}
+}
+
+static int perf_submit_test(struct perf_peer *peer)
+{
+ struct perf_ctx *perf = peer->perf;
+ struct perf_thread *pthr;
+ int tidx, ret;
- val = ntb_spad_read(ndev, MW_SZ_HIGH);
- size = (u64)val << 32;
+ if (!test_bit(PERF_STS_DONE, &peer->sts))
+ return -ENOLINK;
- val = ntb_spad_read(ndev, MW_SZ_LOW);
- size |= val;
+ if (test_and_set_bit_lock(0, &perf->busy_flag))
+ return -EBUSY;
- dev_dbg(&pdev->dev, "Remote MW size = %#llx\n", size);
+ perf->test_peer = peer;
+ atomic_set(&perf->tsync, perf->tcnt);
- rc = perf_set_mw(perf, size);
- if (rc)
- goto out1;
+ for (tidx = 0; tidx < MAX_THREADS_CNT; tidx++) {
+ pthr = &perf->threads[tidx];
- perf->link_is_up = true;
- wake_up(&perf->link_wq);
+ pthr->status = -ENODATA;
+ pthr->copied = 0;
+ pthr->duration = ktime_set(0, 0);
+ if (tidx < perf->tcnt)
+ (void)queue_work(perf_wq, &pthr->work);
+ }
- return;
+ ret = wait_event_interruptible(perf->twait,
+ atomic_read(&perf->tsync) <= 0);
+ if (ret == -ERESTARTSYS) {
+ perf_terminate_test(perf);
+ ret = -EINTR;
+ }
-out1:
- perf_free_mw(perf);
+ clear_bit_unlock(0, &perf->busy_flag);
-out:
- if (ntb_link_is_up(ndev, NULL, NULL) == 1)
- schedule_delayed_work(&perf->link_work,
- msecs_to_jiffies(PERF_LINK_DOWN_TIMEOUT));
+ return ret;
}
-static int perf_setup_mw(struct ntb_dev *ntb, struct perf_ctx *perf)
+static int perf_read_stats(struct perf_ctx *perf, char *buf,
+ size_t size, ssize_t *pos)
{
- struct perf_mw *mw;
- int rc;
+ struct perf_thread *pthr;
+ int tidx;
+
+ if (test_and_set_bit_lock(0, &perf->busy_flag))
+ return -EBUSY;
- mw = &perf->mw;
+ (*pos) += scnprintf(buf + *pos, size - *pos,
+ " Peer %d test statistics:\n", perf->test_peer->pidx);
- rc = ntb_peer_mw_get_addr(ntb, 0, &mw->phys_addr, &mw->phys_size);
- if (rc)
- return rc;
+ for (tidx = 0; tidx < MAX_THREADS_CNT; tidx++) {
+ pthr = &perf->threads[tidx];
- perf->mw.vbase = ioremap_wc(mw->phys_addr, mw->phys_size);
- if (!mw->vbase)
- return -ENOMEM;
+ if (pthr->status == -ENODATA)
+ continue;
+
+ if (pthr->status) {
+ (*pos) += scnprintf(buf + *pos, size - *pos,
+ "%d: error status %d\n", tidx, pthr->status);
+ continue;
+ }
+
+ (*pos) += scnprintf(buf + *pos, size - *pos,
+ "%d: copied %llu bytes in %llu usecs, %llu MBytes/s\n",
+ tidx, pthr->copied, ktime_to_us(pthr->duration),
+ div64_u64(pthr->copied, ktime_to_us(pthr->duration)));
+ }
+
+ clear_bit_unlock(0, &perf->busy_flag);
return 0;
}
-static ssize_t debugfs_run_read(struct file *filp, char __user *ubuf,
- size_t count, loff_t *offp)
+static void perf_init_threads(struct perf_ctx *perf)
{
- struct perf_ctx *perf = filp->private_data;
+ struct perf_thread *pthr;
+ int tidx;
+
+ perf->tcnt = DEF_THREADS_CNT;
+ perf->test_peer = &perf->peers[0];
+ init_waitqueue_head(&perf->twait);
+
+ for (tidx = 0; tidx < MAX_THREADS_CNT; tidx++) {
+ pthr = &perf->threads[tidx];
+
+ pthr->perf = perf;
+ pthr->tidx = tidx;
+ pthr->status = -ENODATA;
+ init_waitqueue_head(&pthr->dma_wait);
+ INIT_WORK(&pthr->work, perf_thread_work);
+ }
+}
+
+static void perf_clear_threads(struct perf_ctx *perf)
+{
+ perf_terminate_test(perf);
+}
+
+/*==============================================================================
+ * DebugFS nodes
+ *==============================================================================
+ */
+
+static ssize_t perf_dbgfs_read_info(struct file *filep, char __user *ubuf,
+ size_t size, loff_t *offp)
+{
+ struct perf_ctx *perf = filep->private_data;
+ struct perf_peer *peer;
+ size_t buf_size;
+ ssize_t pos = 0;
+ int ret, pidx;
char *buf;
- ssize_t ret, out_off = 0;
- struct pthr_ctx *pctx;
- int i;
- u64 rate;
- if (!perf)
- return 0;
+ buf_size = min_t(size_t, size, 0x1000U);
- buf = kmalloc(1024, GFP_KERNEL);
+ buf = kmalloc(buf_size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
- if (mutex_is_locked(&perf->run_mutex)) {
- out_off = scnprintf(buf, 64, "running\n");
- goto read_from_buf;
+ pos += scnprintf(buf + pos, buf_size - pos,
+ " Performance measuring tool info:\n\n");
+
+ pos += scnprintf(buf + pos, buf_size - pos,
+ "Local port %d, Global index %d\n", ntb_port_number(perf->ntb),
+ perf->gidx);
+ pos += scnprintf(buf + pos, buf_size - pos, "Test status: ");
+ if (test_bit(0, &perf->busy_flag)) {
+ pos += scnprintf(buf + pos, buf_size - pos,
+ "on-fly with port %d (%d)\n",
+ ntb_peer_port_number(perf->ntb, perf->test_peer->pidx),
+ perf->test_peer->pidx);
+ } else {
+ pos += scnprintf(buf + pos, buf_size - pos, "idle\n");
}
- for (i = 0; i < MAX_THREADS; i++) {
- pctx = &perf->pthr_ctx[i];
+ for (pidx = 0; pidx < perf->pcnt; pidx++) {
+ peer = &perf->peers[pidx];
+
+ pos += scnprintf(buf + pos, buf_size - pos,
+ "Port %d (%d), Global index %d:\n",
+ ntb_peer_port_number(perf->ntb, peer->pidx), peer->pidx,
+ peer->gidx);
+
+ pos += scnprintf(buf + pos, buf_size - pos,
+ "\tLink status: %s\n",
+ test_bit(PERF_STS_LNKUP, &peer->sts) ? "up" : "down");
+
+ pos += scnprintf(buf + pos, buf_size - pos,
+ "\tOut buffer addr 0x%pK\n", peer->outbuf);
- if (pctx->status == -ENODATA)
- break;
+ pos += scnprintf(buf + pos, buf_size - pos,
+ "\tOut buffer size %pa\n", &peer->outbuf_size);
- if (pctx->status) {
- out_off += scnprintf(buf + out_off, 1024 - out_off,
- "%d: error %d\n", i,
- pctx->status);
+ pos += scnprintf(buf + pos, buf_size - pos,
+ "\tOut buffer xlat 0x%016llx[p]\n", peer->outbuf_xlat);
+
+ if (!peer->inbuf) {
+ pos += scnprintf(buf + pos, buf_size - pos,
+ "\tIn buffer addr: unallocated\n");
continue;
}
- rate = div64_u64(pctx->copied, pctx->diff_us);
- out_off += scnprintf(buf + out_off, 1024 - out_off,
- "%d: copied %llu bytes in %llu usecs, %llu MBytes/s\n",
- i, pctx->copied, pctx->diff_us, rate);
+ pos += scnprintf(buf + pos, buf_size - pos,
+ "\tIn buffer addr 0x%pK\n", peer->inbuf);
+
+ pos += scnprintf(buf + pos, buf_size - pos,
+ "\tIn buffer size %pa\n", &peer->inbuf_size);
+
+ pos += scnprintf(buf + pos, buf_size - pos,
+ "\tIn buffer xlat %pad[p]\n", &peer->inbuf_xlat);
}
-read_from_buf:
- ret = simple_read_from_buffer(ubuf, count, offp, buf, out_off);
+ ret = simple_read_from_buffer(ubuf, size, offp, buf, pos);
kfree(buf);
return ret;
}
-static void threads_cleanup(struct perf_ctx *perf)
+static const struct file_operations perf_dbgfs_info = {
+ .open = simple_open,
+ .read = perf_dbgfs_read_info
+};
+
+static ssize_t perf_dbgfs_read_run(struct file *filep, char __user *ubuf,
+ size_t size, loff_t *offp)
{
- struct pthr_ctx *pctx;
- int i;
+ struct perf_ctx *perf = filep->private_data;
+ ssize_t ret, pos = 0;
+ char *buf;
- for (i = 0; i < MAX_THREADS; i++) {
- pctx = &perf->pthr_ctx[i];
- if (pctx->thread) {
- pctx->status = kthread_stop(pctx->thread);
- pctx->thread = NULL;
- }
- }
-}
+ buf = kmalloc(PERF_BUF_LEN, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
-static void perf_clear_thread_status(struct perf_ctx *perf)
-{
- int i;
+ ret = perf_read_stats(perf, buf, PERF_BUF_LEN, &pos);
+ if (ret)
+ goto err_free;
+
+ ret = simple_read_from_buffer(ubuf, size, offp, buf, pos);
+err_free:
+ kfree(buf);
- for (i = 0; i < MAX_THREADS; i++)
- perf->pthr_ctx[i].status = -ENODATA;
+ return ret;
}
-static ssize_t debugfs_run_write(struct file *filp, const char __user *ubuf,
- size_t count, loff_t *offp)
+static ssize_t perf_dbgfs_write_run(struct file *filep, const char __user *ubuf,
+ size_t size, loff_t *offp)
{
- struct perf_ctx *perf = filp->private_data;
- int node, i;
- DECLARE_WAIT_QUEUE_HEAD(wq);
+ struct perf_ctx *perf = filep->private_data;
+ struct perf_peer *peer;
+ int pidx, ret;
- if (wait_event_interruptible(perf->link_wq, perf->link_is_up))
- return -ENOLINK;
+ ret = kstrtoint_from_user(ubuf, size, 0, &pidx);
+ if (ret)
+ return ret;
- if (perf->perf_threads == 0)
+ if (pidx < 0 || pidx >= perf->pcnt)
return -EINVAL;
- if (!mutex_trylock(&perf->run_mutex))
- return -EBUSY;
+ peer = &perf->peers[pidx];
- perf_clear_thread_status(perf);
+ ret = perf_submit_test(peer);
+ if (ret)
+ return ret;
- if (perf->perf_threads > MAX_THREADS) {
- perf->perf_threads = MAX_THREADS;
- pr_info("Reset total threads to: %u\n", MAX_THREADS);
- }
+ return size;
+}
- /* no greater than 1M */
- if (seg_order > MAX_SEG_ORDER) {
- seg_order = MAX_SEG_ORDER;
- pr_info("Fix seg_order to %u\n", seg_order);
- }
+static const struct file_operations perf_dbgfs_run = {
+ .open = simple_open,
+ .read = perf_dbgfs_read_run,
+ .write = perf_dbgfs_write_run
+};
- if (run_order < seg_order) {
- run_order = seg_order;
- pr_info("Fix run_order to %u\n", run_order);
- }
+static ssize_t perf_dbgfs_read_tcnt(struct file *filep, char __user *ubuf,
+ size_t size, loff_t *offp)
+{
+ struct perf_ctx *perf = filep->private_data;
+ char buf[8];
+ ssize_t pos;
- node = on_node ? dev_to_node(&perf->ntb->pdev->dev)
- : NUMA_NO_NODE;
- atomic_set(&perf->tdone, 0);
+ pos = scnprintf(buf, sizeof(buf), "%hhu\n", perf->tcnt);
- /* launch kernel thread */
- for (i = 0; i < perf->perf_threads; i++) {
- struct pthr_ctx *pctx;
+ return simple_read_from_buffer(ubuf, size, offp, buf, pos);
+}
- pctx = &perf->pthr_ctx[i];
- atomic_set(&pctx->dma_sync, 0);
- pctx->perf = perf;
- pctx->wq = &wq;
- pctx->thread =
- kthread_create_on_node(ntb_perf_thread,
- (void *)pctx,
- node, "ntb_perf %d", i);
- if (IS_ERR(pctx->thread)) {
- pctx->thread = NULL;
- goto err;
- } else {
- wake_up_process(pctx->thread);
- }
- }
+static ssize_t perf_dbgfs_write_tcnt(struct file *filep,
+ const char __user *ubuf,
+ size_t size, loff_t *offp)
+{
+ struct perf_ctx *perf = filep->private_data;
+ int ret;
+ u8 val;
- wait_event_interruptible(wq,
- atomic_read(&perf->tdone) == perf->perf_threads);
+ ret = kstrtou8_from_user(ubuf, size, 0, &val);
+ if (ret)
+ return ret;
- threads_cleanup(perf);
- mutex_unlock(&perf->run_mutex);
- return count;
+ ret = perf_set_tcnt(perf, val);
+ if (ret)
+ return ret;
-err:
- threads_cleanup(perf);
- mutex_unlock(&perf->run_mutex);
- return -ENXIO;
+ return size;
}
-static const struct file_operations ntb_perf_debugfs_run = {
- .owner = THIS_MODULE,
+static const struct file_operations perf_dbgfs_tcnt = {
.open = simple_open,
- .read = debugfs_run_read,
- .write = debugfs_run_write,
+ .read = perf_dbgfs_read_tcnt,
+ .write = perf_dbgfs_write_tcnt
};
-static int perf_debugfs_setup(struct perf_ctx *perf)
+static void perf_setup_dbgfs(struct perf_ctx *perf)
{
struct pci_dev *pdev = perf->ntb->pdev;
- struct dentry *debugfs_node_dir;
- struct dentry *debugfs_run;
- struct dentry *debugfs_threads;
- struct dentry *debugfs_seg_order;
- struct dentry *debugfs_run_order;
- struct dentry *debugfs_use_dma;
- struct dentry *debugfs_on_node;
-
- if (!debugfs_initialized())
- return -ENODEV;
- /* Assumpion: only one NTB device in the system */
- if (!perf_debugfs_dir) {
- perf_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
- if (!perf_debugfs_dir)
- return -ENODEV;
- }
-
- debugfs_node_dir = debugfs_create_dir(pci_name(pdev),
- perf_debugfs_dir);
- if (!debugfs_node_dir)
- goto err;
-
- debugfs_run = debugfs_create_file("run", S_IRUSR | S_IWUSR,
- debugfs_node_dir, perf,
- &ntb_perf_debugfs_run);
- if (!debugfs_run)
- goto err;
-
- debugfs_threads = debugfs_create_u8("threads", S_IRUSR | S_IWUSR,
- debugfs_node_dir,
- &perf->perf_threads);
- if (!debugfs_threads)
- goto err;
-
- debugfs_seg_order = debugfs_create_u32("seg_order", 0600,
- debugfs_node_dir,
- &seg_order);
- if (!debugfs_seg_order)
- goto err;
-
- debugfs_run_order = debugfs_create_u32("run_order", 0600,
- debugfs_node_dir,
- &run_order);
- if (!debugfs_run_order)
- goto err;
-
- debugfs_use_dma = debugfs_create_bool("use_dma", 0600,
- debugfs_node_dir,
- &use_dma);
- if (!debugfs_use_dma)
- goto err;
-
- debugfs_on_node = debugfs_create_bool("on_node", 0600,
- debugfs_node_dir,
- &on_node);
- if (!debugfs_on_node)
- goto err;
+ perf->dbgfs_dir = debugfs_create_dir(pci_name(pdev), perf_dbgfs_topdir);
+ if (!perf->dbgfs_dir) {
+ dev_warn(&perf->ntb->dev, "DebugFS unsupported\n");
+ return;
+ }
+
+ debugfs_create_file("info", 0600, perf->dbgfs_dir, perf,
+ &perf_dbgfs_info);
- return 0;
+ debugfs_create_file("run", 0600, perf->dbgfs_dir, perf,
+ &perf_dbgfs_run);
-err:
- debugfs_remove_recursive(perf_debugfs_dir);
- perf_debugfs_dir = NULL;
- return -ENODEV;
+ debugfs_create_file("threads_count", 0600, perf->dbgfs_dir, perf,
+ &perf_dbgfs_tcnt);
+
+ /* They are made read-only for test exec safety and integrity */
+ debugfs_create_u8("chunk_order", 0500, perf->dbgfs_dir, &chunk_order);
+
+ debugfs_create_u8("total_order", 0500, perf->dbgfs_dir, &total_order);
+
+ debugfs_create_bool("use_dma", 0500, perf->dbgfs_dir, &use_dma);
}
-static int perf_probe(struct ntb_client *client, struct ntb_dev *ntb)
+static void perf_clear_dbgfs(struct perf_ctx *perf)
+{
+ debugfs_remove_recursive(perf->dbgfs_dir);
+}
+
+/*==============================================================================
+ * Basic driver initialization
+ *==============================================================================
+ */
+
+static struct perf_ctx *perf_create_data(struct ntb_dev *ntb)
{
- struct pci_dev *pdev = ntb->pdev;
struct perf_ctx *perf;
- int node;
- int rc = 0;
- if (ntb_spad_count(ntb) < MAX_SPAD) {
- dev_err(&ntb->dev, "Not enough scratch pad registers for %s",
- DRIVER_NAME);
- return -EIO;
- }
+ perf = devm_kzalloc(&ntb->dev, sizeof(*perf), GFP_KERNEL);
+ if (!perf)
+ return ERR_PTR(-ENOMEM);
- if (!ntb->ops->mw_set_trans) {
- dev_err(&ntb->dev, "Need inbound MW based NTB API\n");
- return -EINVAL;
+ perf->pcnt = ntb_peer_port_count(ntb);
+ perf->peers = devm_kcalloc(&ntb->dev, perf->pcnt, sizeof(*perf->peers),
+ GFP_KERNEL);
+ if (!perf->peers)
+ return ERR_PTR(-ENOMEM);
+
+ perf->ntb = ntb;
+
+ return perf;
+}
+
+static int perf_setup_peer_mw(struct perf_peer *peer)
+{
+ struct perf_ctx *perf = peer->perf;
+ phys_addr_t phys_addr;
+ int ret;
+
+ /* Get outbound MW parameters and map it */
+ ret = ntb_peer_mw_get_addr(perf->ntb, peer->gidx, &phys_addr,
+ &peer->outbuf_size);
+ if (ret)
+ return ret;
+
+ peer->outbuf = devm_ioremap_wc(&perf->ntb->dev, phys_addr,
+ peer->outbuf_size);
+ if (!peer->outbuf)
+ return -ENOMEM;
+
+ if (max_mw_size && peer->outbuf_size > max_mw_size) {
+ peer->outbuf_size = max_mw_size;
+ dev_warn(&peer->perf->ntb->dev,
+ "Peer %d outbuf reduced to %#llx\n", peer->pidx,
+ peer->outbuf_size);
}
- if (ntb_peer_port_count(ntb) != NTB_DEF_PEER_CNT)
- dev_warn(&ntb->dev, "Multi-port NTB devices unsupported\n");
+ return 0;
+}
- node = on_node ? dev_to_node(&pdev->dev) : NUMA_NO_NODE;
- perf = kzalloc_node(sizeof(*perf), GFP_KERNEL, node);
- if (!perf) {
- rc = -ENOMEM;
- goto err_perf;
+static int perf_init_peers(struct perf_ctx *perf)
+{
+ struct perf_peer *peer;
+ int pidx, lport, ret;
+
+ lport = ntb_port_number(perf->ntb);
+ perf->gidx = -1;
+ for (pidx = 0; pidx < perf->pcnt; pidx++) {
+ peer = &perf->peers[pidx];
+
+ peer->perf = perf;
+ peer->pidx = pidx;
+ if (lport < ntb_peer_port_number(perf->ntb, pidx)) {
+ if (perf->gidx == -1)
+ perf->gidx = pidx;
+ peer->gidx = pidx + 1;
+ } else {
+ peer->gidx = pidx;
+ }
+ INIT_WORK(&peer->service, perf_service_work);
}
+ if (perf->gidx == -1)
+ perf->gidx = pidx;
- perf->ntb = ntb;
- perf->perf_threads = 1;
- atomic_set(&perf->tsync, 0);
- mutex_init(&perf->run_mutex);
- spin_lock_init(&perf->db_lock);
- perf_setup_mw(ntb, perf);
- init_waitqueue_head(&perf->link_wq);
- INIT_DELAYED_WORK(&perf->link_work, perf_link_work);
+ for (pidx = 0; pidx < perf->pcnt; pidx++) {
+ ret = perf_setup_peer_mw(&perf->peers[pidx]);
+ if (ret)
+ return ret;
+ }
+
+ dev_dbg(&perf->ntb->dev, "Global port index %d\n", perf->gidx);
+
+ return 0;
+}
- rc = ntb_set_ctx(ntb, perf, &perf_ops);
- if (rc)
- goto err_ctx;
+static int perf_probe(struct ntb_client *client, struct ntb_dev *ntb)
+{
+ struct perf_ctx *perf;
+ int ret;
- perf->link_is_up = false;
- ntb_link_enable(ntb, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);
- ntb_link_event(ntb);
+ perf = perf_create_data(ntb);
+ if (IS_ERR(perf))
+ return PTR_ERR(perf);
- rc = perf_debugfs_setup(perf);
- if (rc)
- goto err_ctx;
+ ret = perf_init_peers(perf);
+ if (ret)
+ return ret;
- perf_clear_thread_status(perf);
+ perf_init_threads(perf);
- return 0;
+ ret = perf_init_service(perf);
+ if (ret)
+ return ret;
-err_ctx:
- cancel_delayed_work_sync(&perf->link_work);
- kfree(perf);
-err_perf:
- return rc;
+ ret = perf_enable_service(perf);
+ if (ret)
+ return ret;
+
+ perf_setup_dbgfs(perf);
+
+ return 0;
}
static void perf_remove(struct ntb_client *client, struct ntb_dev *ntb)
{
struct perf_ctx *perf = ntb->ctx;
- int i;
- dev_dbg(&perf->ntb->dev, "%s called\n", __func__);
+ perf_clear_dbgfs(perf);
- mutex_lock(&perf->run_mutex);
+ perf_disable_service(perf);
- cancel_delayed_work_sync(&perf->link_work);
+ perf_clear_threads(perf);
+}
- ntb_clear_ctx(ntb);
- ntb_link_disable(ntb);
+static struct ntb_client perf_client = {
+ .ops = {
+ .probe = perf_probe,
+ .remove = perf_remove
+ }
+};
- debugfs_remove_recursive(perf_debugfs_dir);
- perf_debugfs_dir = NULL;
+static int __init perf_init(void)
+{
+ int ret;
- if (use_dma) {
- for (i = 0; i < MAX_THREADS; i++) {
- struct pthr_ctx *pctx = &perf->pthr_ctx[i];
+ if (chunk_order > MAX_CHUNK_ORDER) {
+ chunk_order = MAX_CHUNK_ORDER;
+ pr_info("Chunk order reduced to %hhu\n", chunk_order);
+ }
- if (pctx->dma_chan)
- dma_release_channel(pctx->dma_chan);
- }
+ if (total_order < chunk_order) {
+ total_order = chunk_order;
+ pr_info("Total data order reduced to %hhu\n", total_order);
}
- kfree(perf);
+ perf_wq = alloc_workqueue("perf_wq", WQ_UNBOUND | WQ_SYSFS, 0);
+ if (!perf_wq)
+ return -ENOMEM;
+
+ if (debugfs_initialized())
+ perf_dbgfs_topdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
+
+ ret = ntb_register_client(&perf_client);
+ if (ret) {
+ debugfs_remove_recursive(perf_dbgfs_topdir);
+ destroy_workqueue(perf_wq);
+ }
+
+ return ret;
}
+module_init(perf_init);
+
+static void __exit perf_exit(void)
+{
+ ntb_unregister_client(&perf_client);
+ debugfs_remove_recursive(perf_dbgfs_topdir);
+ destroy_workqueue(perf_wq);
+}
+module_exit(perf_exit);
-static struct ntb_client perf_client = {
- .ops = {
- .probe = perf_probe,
- .remove = perf_remove,
- },
-};
-module_ntb_client(perf_client);