diff options
| -rw-r--r-- | drivers/ntb/test/ntb_tool.c | 1820 |
1 files changed, 1240 insertions, 580 deletions
diff --git a/drivers/ntb/test/ntb_tool.c b/drivers/ntb/test/ntb_tool.c index e490bbc8726c..920fc9b161b0 100644 --- a/drivers/ntb/test/ntb_tool.c +++ b/drivers/ntb/test/ntb_tool.c @@ -5,6 +5,7 @@ * GPL LICENSE SUMMARY * * Copyright (C) 2015 EMC 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 @@ -18,6 +19,7 @@ * BSD LICENSE * * Copyright (C) 2015 EMC 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 @@ -46,9 +48,6 @@ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * PCIe NTB Debugging Tool Linux driver - * - * Contact Information: - * Allen Hubbe <Allen.Hubbe@emc.com> */ /* @@ -56,42 +55,125 @@ * * Assuming $DBG_DIR is something like: * '/sys/kernel/debug/ntb_tool/0000:00:03.0' + * Suppose aside from local device there is at least one remote device + * connected to NTB with index 0. + *----------------------------------------------------------------------------- + * Eg: check local/peer device information. + * + * # Get local device port number + * root@self# cat $DBG_DIR/port + * + * # Check local device functionality + * root@self# ls $DBG_DIR + * db msg1 msg_sts peer4/ port + * db_event msg2 peer0/ peer5/ spad0 + * db_mask msg3 peer1/ peer_db spad1 + * link msg_event peer2/ peer_db_mask spad2 + * msg0 msg_mask peer3/ peer_spad spad3 + * # As one can see it supports: + * # 1) four inbound message registers + * # 2) four inbound scratchpads + * # 3) up to six peer devices + * + * # Check peer device port number + * root@self# cat $DBG_DIR/peer0/port + * + * # Check peer device(s) functionality to be used + * root@self# ls $DBG_DIR/peer0 + * link mw_trans0 mw_trans6 port + * link_event mw_trans1 mw_trans7 spad0 + * msg0 mw_trans2 peer_mw_trans0 spad1 + * msg1 mw_trans3 peer_mw_trans1 spad2 + * msg2 mw_trans4 peer_mw_trans2 spad3 + * msg3 mw_trans5 peer_mw_trans3 + * # As one can see we got: + * # 1) four outbound message registers + * # 2) four outbound scratchpads + * # 3) eight inbound memory windows + * # 4) four outbound memory windows + *----------------------------------------------------------------------------- + * Eg: NTB link tests * - * Eg: check if clearing the doorbell mask generates an interrupt. + * # Set local link up/down + * root@self# echo Y > $DBG_DIR/link + * root@self# echo N > $DBG_DIR/link * - * # Check the link status - * root@self# cat $DBG_DIR/link + * # Check if link with peer device is up/down: + * root@self# cat $DBG_DIR/peer0/link * - * # Block until the link is up - * root@self# echo Y > $DBG_DIR/link_event + * # Block until the link is up/down + * root@self# echo Y > $DBG_DIR/peer0/link_event + * root@self# echo N > $DBG_DIR/peer0/link_event + *----------------------------------------------------------------------------- + * Eg: Doorbell registers tests (some functionality might be absent) * - * # Set the doorbell mask - * root@self# echo 's 1' > $DBG_DIR/mask + * # Set/clear/get local doorbell + * root@self# echo 's 1' > $DBG_DIR/db + * root@self# echo 'c 1' > $DBG_DIR/db + * root@self# cat $DBG_DIR/db * - * # Ring the doorbell from the peer + * # Set/clear/get local doorbell mask + * root@self# echo 's 1' > $DBG_DIR/db_mask + * root@self# echo 'c 1' > $DBG_DIR/db_mask + * root@self# cat $DBG_DIR/db_mask + * + * # Ring/clear/get peer doorbell * root@peer# echo 's 1' > $DBG_DIR/peer_db + * root@peer# echo 'c 1' > $DBG_DIR/peer_db + * root@peer# cat $DBG_DIR/peer_db + * + * # Set/clear/get peer doorbell mask + * root@self# echo 's 1' > $DBG_DIR/peer_db_mask + * root@self# echo 'c 1' > $DBG_DIR/peer_db_mask + * root@self# cat $DBG_DIR/peer_db_mask + * + * # Block until local doorbell is set with specified value + * root@self# echo 1 > $DBG_DIR/db_event + *----------------------------------------------------------------------------- + * Eg: Message registers tests (functionality might be absent) * - * # Clear the doorbell mask - * root@self# echo 'c 1' > $DBG_DIR/mask + * # Set/clear/get in/out message registers status + * root@self# echo 's 1' > $DBG_DIR/msg_sts + * root@self# echo 'c 1' > $DBG_DIR/msg_sts + * root@self# cat $DBG_DIR/msg_sts * - * Observe debugging output in dmesg or your console. You should see a - * doorbell event triggered by clearing the mask. If not, this may indicate an - * issue with the hardware that needs to be worked around in the driver. + * # Set/clear in/out message registers mask + * root@self# echo 's 1' > $DBG_DIR/msg_mask + * root@self# echo 'c 1' > $DBG_DIR/msg_mask * - * Eg: read and write scratchpad registers + * # Get inbound message register #0 value and source of port index + * root@self# cat $DBG_DIR/msg0 * - * root@peer# echo '0 0x01010101 1 0x7f7f7f7f' > $DBG_DIR/peer_spad + * # Send some data to peer over outbound message register #0 + * root@self# echo 0x01020304 > $DBG_DIR/peer0/msg0 + *----------------------------------------------------------------------------- + * Eg: Scratchpad registers tests (functionality might be absent) * - * root@self# cat $DBG_DIR/spad + * # Write/read to/from local scratchpad register #0 + * root@peer# echo 0x01020304 > $DBG_DIR/spad0 + * root@peer# cat $DBG_DIR/spad0 * - * Observe that spad 0 and 1 have the values set by the peer. + * # Write/read to/from peer scratchpad register #0 + * root@peer# echo 0x01020304 > $DBG_DIR/peer0/spad0 + * root@peer# cat $DBG_DIR/peer0/spad0 + *----------------------------------------------------------------------------- + * Eg: Memory windows tests * - * # Check the memory window translation info - * cat $DBG_DIR/peer_trans0 + * # Create inbound memory window buffer of specified size/get its base address + * root@peer# echo 16384 > $DBG_DIR/peer0/mw_trans0 + * root@peer# cat $DBG_DIR/peer0/mw_trans0 * - * # Setup a 16k memory window buffer - * echo 16384 > $DBG_DIR/peer_trans0 + * # Write/read data to/from inbound memory window + * root@peer# echo Hello > $DBG_DIR/peer0/mw0 + * root@peer# head -c 7 $DBG_DIR/peer0/mw0 * + * # Map outbound memory window/check it settings (on peer device) + * root@peer# echo 0xADD0BA5E:16384 > $DBG_DIR/peer0/peer_mw_trans0 + * root@peer# cat $DBG_DIR/peer0/peer_mw_trans0 + * + * # Write/read data to/from outbound memory window (on peer device) + * root@peer# echo olleH > $DBG_DIR/peer0/peer_mw0 + * root@peer# head -c 7 $DBG_DIR/peer0/peer_mw0 */ #include <linux/init.h> @@ -106,48 +188,87 @@ #include <linux/ntb.h> -#define DRIVER_NAME "ntb_tool" -#define DRIVER_DESCRIPTION "PCIe NTB Debugging Tool" - -#define DRIVER_VERSION "1.0" -#define DRIVER_RELDATE "22 April 2015" -#define DRIVER_AUTHOR "Allen Hubbe <Allen.Hubbe@emc.com>" +#define DRIVER_NAME "ntb_tool" +#define DRIVER_VERSION "2.0" MODULE_LICENSE("Dual BSD/GPL"); MODULE_VERSION(DRIVER_VERSION); -MODULE_AUTHOR(DRIVER_AUTHOR); -MODULE_DESCRIPTION(DRIVER_DESCRIPTION); - -/* It is rare to have hadrware with greater than six MWs */ -#define MAX_MWS 6 -/* Only two-ports devices are supported */ -#define PIDX NTB_DEF_PEER_IDX - -static struct dentry *tool_dbgfs; +MODULE_AUTHOR("Allen Hubbe <Allen.Hubbe@emc.com>"); +MODULE_DESCRIPTION("PCIe NTB Debugging Tool"); +/* + * Inbound and outbound memory windows descriptor. Union members selection + * depends on the MW type the structure describes. mm_base/dma_base are the + * virtual and DMA address of an inbound MW. io_base/tr_base are the MMIO + * mapped virtual and xlat addresses of an outbound MW respectively. + */ struct tool_mw { - int idx; + int widx; + int pidx; struct tool_ctx *tc; - resource_size_t win_size; + union { + u8 *mm_base; + u8 __iomem *io_base; + }; + union { + dma_addr_t dma_base; + u64 tr_base; + }; resource_size_t size; - u8 __iomem *local; - u8 *peer; - dma_addr_t peer_dma; - struct dentry *peer_dbg_file; + struct dentry *dbgfs_file; +}; + +/* + * Wrapper structure is used to distinguish the outbound MW peers reference + * within the corresponding DebugFS directory IO operation. + */ +struct tool_mw_wrap { + int pidx; + struct tool_mw *mw; +}; + +struct tool_msg { + int midx; + int pidx; + struct tool_ctx *tc; +}; + +struct tool_spad { + int sidx; + int pidx; + struct tool_ctx *tc; +}; + +struct tool_peer { + int pidx; + struct tool_ctx *tc; + int inmw_cnt; + struct tool_mw *inmws; + int outmw_cnt; + struct tool_mw_wrap *outmws; + int outmsg_cnt; + struct tool_msg *outmsgs; + int outspad_cnt; + struct tool_spad *outspads; + struct dentry *dbgfs_dir; }; struct tool_ctx { struct ntb_dev *ntb; - struct dentry *dbgfs; wait_queue_head_t link_wq; - int mw_count; - struct tool_mw mws[MAX_MWS]; + wait_queue_head_t db_wq; + wait_queue_head_t msg_wq; + int outmw_cnt; + struct tool_mw *outmws; + int peer_cnt; + struct tool_peer *peers; + int inmsg_cnt; + struct tool_msg *inmsgs; + int inspad_cnt; + struct tool_spad *inspads; + struct dentry *dbgfs_dir; }; -#define SPAD_FNAME_SIZE 0x10 -#define INT_PTR(x) ((void *)(unsigned long)x) -#define PTR_INT(x) ((int)(unsigned long)x) - #define TOOL_FOPS_RDWR(__name, __read, __write) \ const struct file_operations __name = { \ .owner = THIS_MODULE, \ @@ -156,6 +277,15 @@ struct tool_ctx { .write = __write, \ } +#define TOOL_BUF_LEN 32 + +static struct dentry *tool_dbgfs_topdir; + +/*============================================================================== + * NTB events handlers + *============================================================================== + */ + static void tool_link_event(void *ctx) { struct tool_ctx *tc = ctx; @@ -181,580 +311,576 @@ static void tool_db_event(void *ctx, int vec) dev_dbg(&tc->ntb->dev, "doorbell vec %d mask %#llx bits %#llx\n", vec, db_mask, db_bits); + + wake_up(&tc->db_wq); +} + +static void tool_msg_event(void *ctx) +{ + struct tool_ctx *tc = ctx; + u64 msg_sts; + + msg_sts = ntb_msg_read_sts(tc->ntb); + + dev_dbg(&tc->ntb->dev, "message bits %#llx\n", msg_sts); + + wake_up(&tc->msg_wq); } static const struct ntb_ctx_ops tool_ops = { .link_event = tool_link_event, .db_event = tool_db_event, + .msg_event = tool_msg_event }; -static ssize_t tool_dbfn_read(struct tool_ctx *tc, char __user *ubuf, - size_t size, loff_t *offp, - u64 (*db_read_fn)(struct ntb_dev *)) +/*============================================================================== + * Common read/write methods + *============================================================================== + */ + +static ssize_t tool_fn_read(struct tool_ctx *tc, char __user *ubuf, + size_t size, loff_t *offp, + u64 (*fn_read)(struct ntb_dev *)) { size_t buf_size; - char *buf; - ssize_t pos, rc; + char buf[TOOL_BUF_LEN]; + ssize_t pos; - if (!db_read_fn) + if (!fn_read) return -EINVAL; - buf_size = min_t(size_t, size, 0x20); - - buf = kmalloc(buf_size, GFP_KERNEL); - if (!buf) - return -ENOMEM; - - pos = scnprintf(buf, buf_size, "%#llx\n", - db_read_fn(tc->ntb)); + buf_size = min(size, sizeof(buf)); - rc = simple_read_from_buffer(ubuf, size, offp, buf, pos); + pos = scnprintf(buf, buf_size, "%#llx\n", fn_read(tc->ntb)); - kfree(buf); - - return rc; + return simple_read_from_buffer(ubuf, size, offp, buf, pos); } -static ssize_t tool_dbfn_write(struct tool_ctx *tc, - const char __user *ubuf, - size_t size, loff_t *offp, - int (*db_set_fn)(struct ntb_dev *, u64), - int (*db_clear_fn)(struct ntb_dev *, u64)) +static ssize_t tool_fn_write(struct tool_ctx *tc, + const char __user *ubuf, + size_t size, loff_t *offp, + int (*fn_set)(struct ntb_dev *, u64), + int (*fn_clear)(struct ntb_dev *, u64)) { - u64 db_bits; char *buf, cmd; - ssize_t rc; + ssize_t ret; + u64 bits; int n; buf = kmalloc(size + 1, GFP_KERNEL); if (!buf) return -ENOMEM; - rc = simple_write_to_buffer(buf, size, offp, ubuf, size); - if (rc < 0) { + ret = simple_write_to_buffer(buf, size, offp, ubuf, size); + if (ret < 0) { kfree(buf); - return rc; + return ret; } buf[size] = 0; - n = sscanf(buf, "%c %lli", &cmd, &db_bits); + n = sscanf(buf, "%c %lli", &cmd, &bits); kfree(buf); if (n != 2) { - rc = -EINVAL; + ret = -EINVAL; } else if (cmd == 's') { - if (!db_set_fn) - rc = -EINVAL; + if (!fn_set) + ret = -EINVAL; else - rc = db_set_fn(tc->ntb, db_bits); + ret = fn_set(tc->ntb, bits); } else if (cmd == 'c') { - if (!db_clear_fn) - rc = -EINVAL; + if (!fn_clear) + ret = -EINVAL; else - rc = db_clear_fn(tc->ntb, db_bits); + ret = fn_clear(tc->ntb, bits); } else { - rc = -EINVAL; + ret = -EINVAL; } - return rc ? : size; + return ret ? : size; } -static ssize_t tool_spadfn_read(struct tool_ctx *tc, char __user *ubuf, - size_t size, loff_t *offp, - u32 (*spad_read_fn)(struct ntb_dev *, int)) -{ - size_t buf_size; - char *buf; - ssize_t pos, rc; - int i, spad_count; - - if (!spad_read_fn) - return -EINVAL; - - spad_count = ntb_spad_count(tc->ntb); +/*============================================================================== + * Port read/write methods + *============================================================================== + */ - /* - * We multiply the number of spads by 15 to get the buffer size - * this is from 3 for the %d, 10 for the largest hex value - * (0x00000000) and 2 for the tab and line feed. - */ - buf_size = min_t(size_t, size, spad_count * 15); +static ssize_t tool_port_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + char buf[TOOL_BUF_LEN]; + int pos; - buf = kmalloc(buf_size, GFP_KERNEL); - if (!buf) - return -ENOMEM; + pos = scnprintf(buf, sizeof(buf), "%d\n", ntb_port_number(tc->ntb)); - pos = 0; + return simple_read_from_buffer(ubuf, size, offp, buf, pos); +} - for (i = 0; i < spad_count; ++i) { - pos += scnprintf(buf + pos, buf_size - pos, "%d\t%#x\n", - i, spad_read_fn(tc->ntb, i)); - } +static TOOL_FOPS_RDWR(tool_port_fops, + tool_port_read, + NULL); - rc = simple_read_from_buffer(ubuf, size, offp, buf, pos); +static ssize_t tool_peer_port_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_peer *peer = filep->private_data; + struct tool_ctx *tc = peer->tc; + char buf[TOOL_BUF_LEN]; + int pos; - kfree(buf); + pos = scnprintf(buf, sizeof(buf), "%d\n", + ntb_peer_port_number(tc->ntb, peer->pidx)); - return rc; + return simple_read_from_buffer(ubuf, size, offp, buf, pos); } -static ssize_t tool_spadfn_write(struct tool_ctx *tc, - const char __user *ubuf, - size_t size, loff_t *offp, - int (*spad_write_fn)(struct ntb_dev *, - int, u32)) +static TOOL_FOPS_RDWR(tool_peer_port_fops, + tool_peer_port_read, + NULL); + +static int tool_init_peers(struct tool_ctx *tc) { - int spad_idx; - u32 spad_val; - char *buf, *buf_ptr; - int pos, n; - ssize_t rc; - - if (!spad_write_fn) { - dev_dbg(&tc->ntb->dev, "no spad write fn\n"); - return -EINVAL; - } + int pidx; - buf = kmalloc(size + 1, GFP_KERNEL); - if (!buf) + tc->peer_cnt = ntb_peer_port_count(tc->ntb); + tc->peers = devm_kcalloc(&tc->ntb->dev, tc->peer_cnt, + sizeof(*tc->peers), GFP_KERNEL); + if (tc->peers == NULL) return -ENOMEM; - rc = simple_write_to_buffer(buf, size, offp, ubuf, size); - if (rc < 0) { - kfree(buf); - return rc; + for (pidx = 0; pidx < tc->peer_cnt; pidx++) { + tc->peers[pidx].pidx = pidx; + tc->peers[pidx].tc = tc; } - buf[size] = 0; - buf_ptr = buf; - n = sscanf(buf_ptr, "%d %i%n", &spad_idx, &spad_val, &pos); - while (n == 2) { - buf_ptr += pos; - rc = spad_write_fn(tc->ntb, spad_idx, spad_val); - if (rc) - break; - - n = sscanf(buf_ptr, "%d %i%n", &spad_idx, &spad_val, &pos); - } - - if (n < 0) - rc = n; - - kfree(buf); - - return rc ? : size; + return 0; } -static ssize_t tool_db_read(struct file *filep, char __user *ubuf, - size_t size, loff_t *offp) -{ - struct tool_ctx *tc = filep->private_data; - - return tool_dbfn_read(tc, ubuf, size, offp, - tc->ntb->ops->db_read); -} +/*============================================================================== + * Link state read/write methods + *============================================================================== + */ -static ssize_t tool_db_write(struct file *filep, const char __user *ubuf, - size_t size, loff_t *offp) +static ssize_t tool_link_write(struct file *filep, const char __user *ubuf, + size_t size, loff_t *offp) { struct tool_ctx *tc = filep->private_data; + bool val; + int ret; - return tool_dbfn_write(tc, ubuf, size, offp, - tc->ntb->ops->db_set, - tc->ntb->ops->db_clear); -} + ret = kstrtobool_from_user(ubuf, size, &val); + if (ret) + return ret; -static TOOL_FOPS_RDWR(tool_db_fops, - tool_db_read, - tool_db_write); + if (val) + ret = ntb_link_enable(tc->ntb, NTB_SPEED_AUTO, NTB_WIDTH_AUTO); + else + ret = ntb_link_disable(tc->ntb); -static ssize_t tool_mask_read(struct file *filep, char __user *ubuf, - size_t size, loff_t *offp) -{ - struct tool_ctx *tc = filep->private_data; + if (ret) + return ret; - return tool_dbfn_read(tc, ubuf, size, offp, - tc->ntb->ops->db_read_mask); + return size; } -static ssize_t tool_mask_write(struct file *filep, const char __user *ubuf, - size_t size, loff_t *offp) +static TOOL_FOPS_RDWR(tool_link_fops, + NULL, + tool_link_write); + +static ssize_t tool_peer_link_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) { - struct tool_ctx *tc = filep->private_data; + struct tool_peer *peer = filep->private_data; + struct tool_ctx *tc = peer->tc; + char buf[3]; - return tool_dbfn_write(tc, ubuf, size, offp, - tc->ntb->ops->db_set_mask, - tc->ntb->ops->db_clear_mask); + if (ntb_link_is_up(tc->ntb, NULL, NULL) & BIT(peer->pidx)) + buf[0] = 'Y'; + else + buf[0] = 'N'; + buf[1] = '\n'; + buf[2] = '\0'; + + return simple_read_from_buffer(ubuf, size, offp, buf, 3); } -static TOOL_FOPS_RDWR(tool_mask_fops, - tool_mask_read, - tool_mask_write); +static TOOL_FOPS_RDWR(tool_peer_link_fops, + tool_peer_link_read, + NULL); -static ssize_t tool_peer_db_read(struct file *filep, char __user *ubuf, - size_t size, loff_t *offp) +static ssize_t tool_peer_link_event_write(struct file *filep, + const char __user *ubuf, + size_t size, loff_t *offp) { - struct tool_ctx *tc = filep->private_data; + struct tool_peer *peer = filep->private_data; + struct tool_ctx *tc = peer->tc; + u64 link_msk; + bool val; + int ret; - return tool_dbfn_read(tc, ubuf, size, offp, - tc->ntb->ops->peer_db_read); -} + ret = kstrtobool_from_user(ubuf, size, &val); + if (ret) + return ret; -static ssize_t tool_peer_db_write(struct file *filep, const char __user *ubuf, - size_t size, loff_t *offp) -{ - struct tool_ctx *tc = filep->private_data; + link_msk = BIT_ULL_MASK(peer->pidx); - return tool_dbfn_write(tc, ubuf, size, offp, - tc->ntb->ops->peer_db_set, - tc->ntb->ops->peer_db_clear); + if (wait_event_interruptible(tc->link_wq, + !!(ntb_link_is_up(tc->ntb, NULL, NULL) & link_msk) == val)) + return -ERESTART; + + return size; } -static TOOL_FOPS_RDWR(tool_peer_db_fops, - tool_peer_db_read, - tool_peer_db_write); +static TOOL_FOPS_RDWR(tool_peer_link_event_fops, + NULL, + tool_peer_link_event_write); -static ssize_t tool_peer_mask_read(struct file *filep, char __user *ubuf, - size_t size, loff_t *offp) +/*============================================================================== + * Memory windows read/write/setting methods + *============================================================================== + */ + +static ssize_t tool_mw_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) { - struct tool_ctx *tc = filep->private_data; + struct tool_mw *inmw = filep->private_data; + + if (inmw->mm_base == NULL) + return -ENXIO; - return tool_dbfn_read(tc, ubuf, size, offp, - tc->ntb->ops->peer_db_read_mask); + return simple_read_from_buffer(ubuf, size, offp, + inmw->mm_base, inmw->size); } -static ssize_t tool_peer_mask_write(struct file *filep, const char __user *ubuf, - size_t size, loff_t *offp) +static ssize_t tool_mw_write(struct file *filep, const char __user *ubuf, + size_t size, loff_t *offp) { - struct tool_ctx *tc = filep->private_data; + struct tool_mw *inmw = filep->private_data; - return tool_dbfn_write(tc, ubuf, size, offp, - tc->ntb->ops->peer_db_set_mask, - tc->ntb->ops->peer_db_clear_mask); + if (inmw->mm_base == NULL) + return -ENXIO; + + return simple_write_to_buffer(inmw->mm_base, inmw->size, offp, + ubuf, size); } -static TOOL_FOPS_RDWR(tool_peer_mask_fops, - tool_peer_mask_read, - tool_peer_mask_write); +static TOOL_FOPS_RDWR(tool_mw_fops, + tool_mw_read, + tool_mw_write); -static ssize_t tool_spad_read(struct file *filep, char __user *ubuf, - size_t size, loff_t *offp) +static int tool_setup_mw(struct tool_ctx *tc, int pidx, int widx, + size_t req_size) { - struct tool_ctx *tc = filep->private_data; + resource_size_t size, addr_align, size_align; + struct tool_mw *inmw = &tc->peers[pidx].inmws[widx]; + char buf[TOOL_BUF_LEN]; + int ret; - return tool_spadfn_read(tc, ubuf, size, offp, - tc->ntb->ops->spad_read); -} + if (inmw->mm_base != NULL) + return 0; -static ssize_t tool_spad_write(struct file *filep, const char __user *ubuf, - size_t size, loff_t *offp) -{ - struct tool_ctx *tc = filep->private_data; + ret = ntb_mw_get_align(tc->ntb, pidx, widx, &addr_align, + &size_align, &size); + if (ret) + return ret; + + inmw->size = min_t(resource_size_t, req_size, size); + inmw->size = round_up(inmw->size, addr_align); + inmw->size = round_up(inmw->size, size_align); + inmw->mm_base = dma_alloc_coherent(&tc->ntb->dev, inmw->size, + &inmw->dma_base, GFP_KERNEL); + if (!inmw->mm_base) + return -ENOMEM; - return tool_spadfn_write(tc, ubuf, size, offp, - tc->ntb->ops->spad_write); -} + if (!IS_ALIGNED(inmw->dma_base, addr_align)) { + ret = -ENOMEM; + goto err_free_dma; + } -static TOOL_FOPS_RDWR(tool_spad_fops, - tool_spad_read, - tool_spad_write); + ret = ntb_mw_set_trans(tc->ntb, pidx, widx, inmw->dma_base, inmw->size); + if (ret) + goto err_free_dma; -static u32 ntb_tool_peer_spad_read(struct ntb_dev *ntb, int sidx) -{ - return ntb_peer_spad_read(ntb, PIDX, sidx); -} + snprintf(buf, sizeof(buf), "mw%d", widx); + inmw->dbgfs_file = debugfs_create_file(buf, 0600, + tc->peers[pidx].dbgfs_dir, inmw, + &tool_mw_fops); -static ssize_t tool_peer_spad_read(struct file *filep, char __user *ubuf, - size_t size, loff_t *offp) -{ - struct tool_ctx *tc = filep->private_data; + return 0; - return tool_spadfn_read(tc, ubuf, size, offp, ntb_tool_peer_spad_read); -} +err_free_dma: + dma_free_coherent(&tc->ntb->dev, inmw->size, inmw->mm_base, + inmw->dma_base); + inmw->mm_base = NULL; + inmw->dma_base = 0; + inmw->size = 0; -static int ntb_tool_peer_spad_write(struct ntb_dev *ntb, int sidx, u32 val) -{ - return ntb_peer_spad_write(ntb, PIDX, sidx, val); + return ret; } -static ssize_t tool_peer_spad_write(struct file *filep, const char __user *ubuf, - size_t size, loff_t *offp) +static void tool_free_mw(struct tool_ctx *tc, int pidx, int widx) { - struct tool_ctx *tc = filep->private_data; - - return tool_spadfn_write(tc, ubuf, size, offp, - ntb_tool_peer_spad_write); -} - -static TOOL_FOPS_RDWR(tool_peer_spad_fops, - tool_peer_spad_read, - tool_peer_spad_write); + struct tool_mw *inmw = &tc->peers[pidx].inmws[widx]; -static ssize_t tool_link_read(struct file *filep, char __user *ubuf, - size_t size, loff_t *offp) -{ - struct tool_ctx *tc = filep->private_data; - char buf[3]; + debugfs_remove(inmw->dbgfs_file); - buf[0] = ntb_link_is_up(tc->ntb, NULL, NULL) ? 'Y' : 'N'; - buf[1] = '\n'; - buf[2] = '\0'; + if (inmw->mm_base != NULL) { + ntb_mw_clear_trans(tc->ntb, pidx, widx); + dma_free_coherent(&tc->ntb->dev, inmw->size, + inmw->mm_base, inmw->dma_base); + } - return simple_read_from_buffer(ubuf, size, offp, buf, 2); + inmw->mm_base = NULL; + inmw->dma_base = 0; + inmw->size = 0; + inmw->dbgfs_file = NULL; } -static ssize_t tool_link_write(struct file *filep, const char __user *ubuf, - size_t size, loff_t *offp) +static ssize_t tool_mw_trans_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) { - struct tool_ctx *tc = filep->private_data; - char buf[32]; + struct tool_mw *inmw = filep->private_data; + resource_size_t addr_align; + resource_size_t size_align; + resource_size_t size_max; + ssize_t ret, off = 0; size_t buf_size; - bool val; - int rc; + char *buf; - buf_size = min(size, (sizeof(buf) - 1)); - if (copy_from_user(buf, ubuf, buf_size)) - return -EFAULT; + buf_size = min_t(size_t, size, 512); - buf[buf_size] = '\0'; + buf = kmalloc(buf_size, GFP_KERNEL); + if (!buf) + return -ENOMEM; - rc = strtobool(buf, &val); - if (rc) - return rc; + ret = ntb_mw_get_align(inmw->tc->ntb, inmw->pidx, inmw->widx, + &addr_align, &size_align, &size_max); + if (ret) + return ret; - if (val) - rc = ntb_link_enable(tc->ntb, NTB_SPEED_AUTO, NTB_WIDTH_AUTO); - else - rc = ntb_link_disable(tc->ntb); + off += scnprintf(buf + off, buf_size - off, + "Inbound MW \t%d\n", + inmw->widx); - if (rc) - return rc; + off += scnprintf(buf + off, buf_size - off, + "Port \t%d (%d)\n", + ntb_peer_port_number(inmw->tc->ntb, inmw->pidx), + inmw->pidx); - return size; -} + off += scnprintf(buf + off, buf_size - off, + "Window Address \t0x%pK\n", inmw->mm_base); -static TOOL_FOPS_RDWR(tool_link_fops, - tool_link_read, - tool_link_write); + off += scnprintf(buf + off, buf_size - off, + "DMA Address \t%pad\n", + &inmw->dma_base); -static ssize_t tool_link_event_write(struct file *filep, - const char __user *ubuf, - size_t size, loff_t *offp) -{ - struct tool_ctx *tc = filep->private_data; - char buf[32]; - size_t buf_size; - bool val; - int rc; + off += scnprintf(buf + off, buf_size - off, + "Window Size \t%pa[p]\n", + &inmw->size); - buf_size = min(size, (sizeof(buf) - 1)); - if (copy_from_user(buf, ubuf, buf_size)) - return -EFAULT; + off += scnprintf(buf + off, buf_size - off, + "Alignment \t%pa[p]\n", + &addr_align); - buf[buf_size] = '\0'; + off += scnprintf(buf + off, buf_size - off, + "Size Alignment \t%pa[p]\n", + &size_align); - rc = strtobool(buf, &val); - if (rc) - return rc; + off += scnprintf(buf + off, buf_size - off, + "Size Max \t%pa[p]\n", + &size_max); - if (wait_event_interruptible(tc->link_wq, - ntb_link_is_up(tc->ntb, NULL, NULL) == val)) - return -ERESTART; + ret = simple_read_from_buffer(ubuf, size, offp, buf, off); + kfree(buf); + + return ret; +} + +static ssize_t tool_mw_trans_write(struct file *filep, const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_mw *inmw = filep->private_data; + unsigned int val; + int ret; + + ret = kstrtouint_from_user(ubuf, size, 0, &val); + if (ret) + return ret; + + tool_free_mw(inmw->tc, inmw->pidx, inmw->widx); + if (val) { + ret = tool_setup_mw(inmw->tc, inmw->pidx, inmw->widx, val); + if (ret) + return ret; + } return size; } -static TOOL_FOPS_RDWR(tool_link_event_fops, - NULL, - tool_link_event_write); +static TOOL_FOPS_RDWR(tool_mw_trans_fops, + tool_mw_trans_read, + tool_mw_trans_write); -static ssize_t tool_mw_read(struct file *filep, char __user *ubuf, - size_t size, loff_t *offp) +static ssize_t tool_peer_mw_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) { - struct tool_mw *mw = filep->private_data; - ssize_t rc; + struct tool_mw *outmw = filep->private_data; loff_t pos = *offp; + ssize_t ret; void *buf; - if (mw->local == NULL) + if (outmw->io_base == NULL) return -EIO; - if (pos < 0) - return -EINVAL; - if (pos >= mw->win_size || !size) + + if (pos >= outmw->size || !size) return 0; - if (size > mw->win_size - pos) - size = mw->win_size - pos; + + if (size > outmw->size - pos) + size = outmw->size - pos; buf = kmalloc(size, GFP_KERNEL); if (!buf) return -ENOMEM; - memcpy_fromio(buf, mw->local + pos, size); - rc = copy_to_user(ubuf, buf, size); - if (rc == size) { - rc = -EFAULT; + memcpy_fromio(buf, outmw->io_base + pos, size); + ret = copy_to_user(ubuf, buf, size); + if (ret == size) { + ret = -EFAULT; goto err_free; } - size -= rc; + size -= ret; *offp = pos + size; - rc = size; + ret = size; err_free: kfree(buf); - return rc; + return ret; } -static ssize_t tool_mw_write(struct file *filep, const char __user *ubuf, - size_t size, loff_t *offp) +static ssize_t tool_peer_mw_write(struct file *filep, const char __user *ubuf, + size_t size, loff_t *offp) { - struct tool_mw *mw = filep->private_data; - ssize_t rc; + struct tool_mw *outmw = filep->private_data; + ssize_t ret; loff_t pos = *offp; void *buf; - if (pos < 0) - return -EINVAL; - if (pos >= mw->win_size || !size) + if (outmw->io_base == NULL) + return -EIO; + + if (pos >= outmw->size || !size) return 0; - if (size > mw->win_size - pos) - size = mw->win_size - pos; + if (size > outmw->size - pos) + size = outmw->size - pos; buf = kmalloc(size, GFP_KERNEL); if (!buf) return -ENOMEM; - rc = copy_from_user(buf, ubuf, size); - if (rc == size) { - rc = -EFAULT; + ret = copy_from_user(buf, ubuf, size); + if (ret == size) { + ret = -EFAULT; goto err_free; } - size -= rc; + size -= ret; *offp = pos + size; - rc = size; + ret = size; - memcpy_toio(mw->local + pos, buf, size); + memcpy_toio(outmw->io_base + pos, buf, size); err_free: kfree(buf); - return rc; -} - -static TOOL_FOPS_RDWR(tool_mw_fops, - tool_mw_read, - tool_mw_write); - -static ssize_t tool_peer_mw_read(struct file *filep, char __user *ubuf, - size_t size, loff_t *offp) -{ - struct tool_mw *mw = filep->private_data; - - if (!mw->peer) - return -ENXIO; - - return simple_read_from_buffer(ubuf, size, offp, mw->peer, mw->size); -} - -static ssize_t tool_peer_mw_write(struct file *filep, const char __user *ubuf, - size_t size, loff_t *offp) -{ - struct tool_mw *mw = filep->private_data; - - if (!mw->peer) - return -ENXIO; - - return simple_write_to_buffer(mw->peer, mw->size, offp, ubuf, size); + return ret; } static TOOL_FOPS_RDWR(tool_peer_mw_fops, tool_peer_mw_read, tool_peer_mw_write); -static int tool_setup_mw(struct tool_ctx *tc, int idx, size_t req_size) +static int tool_setup_peer_mw(struct tool_ctx *tc, int pidx, int widx, + u64 req_addr, size_t req_size) { - int rc; - struct tool_mw *mw = &tc->mws[idx]; - resource_size_t size, align_addr, align_size; - char buf[16]; + struct tool_mw *outmw = &tc->outmws[widx]; + resource_size_t map_size; + phys_addr_t map_base; + char buf[TOOL_BUF_LEN]; + int ret; - if (mw->peer) + if (outmw->io_base != NULL) return 0; - rc = ntb_mw_get_align(tc->ntb, PIDX, idx, &align_addr, - &align_size, &size); - if (rc) - return rc; + ret = ntb_peer_mw_get_addr(tc->ntb, widx, &map_base, &map_size); + if (ret) + return ret; - mw->size = min_t(resource_size_t, req_size, size); - mw->size = round_up(mw->size, align_addr); - mw->size = round_up(mw->size, align_size); - mw->peer = dma_alloc_coherent(&tc->ntb->pdev->dev, mw->size, - &mw->peer_dma, GFP_KERNEL); + ret = ntb_peer_mw_set_trans(tc->ntb, pidx, widx, req_addr, req_size); + if (ret) + return ret; - if (!mw->peer || !IS_ALIGNED(mw->peer_dma, align_addr)) - return -ENOMEM; + outmw->io_base = ioremap_wc(map_base, map_size); + if (outmw->io_base == NULL) { + ret = -EFAULT; + goto err_clear_trans; + } - rc = ntb_mw_set_trans(tc->ntb, PIDX, idx, mw->peer_dma, mw->size); - if (rc) - goto err_free_dma; + outmw->tr_base = req_addr; + outmw->size = req_size; + outmw->pidx = pidx; - snprintf(buf, sizeof(buf), "peer_mw%d", idx); - mw->peer_dbg_file = debugfs_create_file(buf, S_IRUSR | S_IWUSR, - mw->tc->dbgfs, mw, - &tool_peer_mw_fops); + snprintf(buf, sizeof(buf), "peer_mw%d", widx); + outmw->dbgfs_file = debugfs_create_file(buf, 0600, + tc->peers[pidx].dbgfs_dir, outmw, + &tool_peer_mw_fops); return 0; -err_free_dma: - dma_free_coherent(&tc->ntb->pdev->dev, mw->size, - mw->peer, - mw->peer_dma); - mw->peer = NULL; - mw->peer_dma = 0; - mw->size = 0; - - return rc; +err_clear_trans: + ntb_peer_mw_clear_trans(tc->ntb, pidx, widx); + + return ret; } -static void tool_free_mw(struct tool_ctx *tc, int idx) +static void tool_free_peer_mw(struct tool_ctx *tc, int widx) { - struct tool_mw *mw = &tc->mws[idx]; - - if (mw->peer) { - ntb_mw_clear_trans(tc->ntb, PIDX, idx); - dma_free_coherent(&tc->ntb->pdev->dev, mw->size, - mw->peer, - mw->peer_dma); - } + struct tool_mw *outmw = &tc->outmws[widx]; - mw->peer = NULL; - mw->peer_dma = 0; + debugfs_remove(outmw->dbgfs_file); - debugfs_remove(mw->peer_dbg_file); + if (outmw->io_base != NULL) { + iounmap(tc->outmws[widx].io_base); + ntb_peer_mw_clear_trans(tc->ntb, outmw->pidx, widx); + } - mw->peer_dbg_file = NULL; + outmw->io_base = NULL; + outmw->tr_base = 0; + outmw->size = 0; + outmw->pidx = -1; + outmw->dbgfs_file = NULL; } -static ssize_t tool_peer_mw_trans_read(struct file *filep, - char __user *ubuf, - size_t size, loff_t *offp) +static ssize_t tool_peer_mw_trans_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) { - struct tool_mw *mw = filep->private_data; - - char *buf; + struct tool_mw_wrap *outmw_wrap = filep->private_data; + struct tool_mw *outmw = outmw_wrap->mw; + resource_size_t map_size; + phys_addr_t map_base; + ssize_t off = 0; size_t buf_size; - ssize_t ret, off = 0; + char *buf; + int ret; - phys_addr_t base; - resource_size_t mw_size; - resource_size_t align_addr = 0; - resource_size_t align_size = 0; - resource_size_t max_size = 0; + ret = ntb_peer_mw_get_addr(outmw->tc->ntb, outmw->widx, + &map_base, &map_size); + if (ret) + return ret; buf_size = min_t(size_t, size, 512); @@ -762,43 +888,37 @@ static ssize_t tool_peer_mw_trans_read(struct file *filep, if (!buf) return -ENOMEM; - ntb_mw_get_align(mw->tc->ntb, PIDX, mw->idx, - &align_addr, &align_size, &max_size); - ntb_peer_mw_get_addr(mw->tc->ntb, mw->idx, &base, &mw_size); - - off += scnprintf(buf + off, buf_size - off, - "Peer MW %d Information:\n", mw->idx); - off += scnprintf(buf + off, buf_size - off, - "Physical Address \t%pa[p]\n", - &base); + "Outbound MW: \t%d\n", outmw->widx); - off += scnprintf(buf + off, buf_size - off, - "Window Size \t%lld\n", - (unsigned long long)mw_size); + if (outmw->io_base != NULL) { + off += scnprintf(buf + off, buf_size - off, + "Port attached \t%d (%d)\n", + ntb_peer_port_number(outmw->tc->ntb, outmw->pidx), + outmw->pidx); + } else { + off += scnprintf(buf + off, buf_size - off, + "Port attached \t-1 (-1)\n"); + } off += scnprintf(buf + off, buf_size - off, - "Alignment \t%lld\n", - (unsigned long long)align_addr); + "Virtual address \t0x%pK\n", outmw->io_base); off += scnprintf(buf + off, buf_size - off, - "Size Alignment \t%lld\n", - (unsigned long long)align_size); + "Phys Address \t%pa[p]\n", &map_base); off += scnprintf(buf + off, buf_size - off, - "Size Max \t%lld\n", - (unsigned long long)max_size); + "Mapping Size \t%pa[p]\n", &map_size); off += scnprintf(buf + off, buf_size - off, - "Ready \t%c\n", - (mw->peer) ? 'Y' : 'N'); + "Translation Address \t0x%016llx\n", outmw->tr_base); off += scnprintf(buf + off, buf_size - off, - "Allocated Size \t%zd\n", - (mw->peer) ? (size_t)mw->size : 0); + "Window Size \t%pa[p]\n", &outmw->size); ret = simple_read_from_buffer(ubuf, size, offp, buf, off); kfree(buf); + return ret; } @@ -806,12 +926,12 @@ static ssize_t tool_peer_mw_trans_write(struct file *filep, const char __user *ubuf, size_t size, loff_t *offp) { - struct tool_mw *mw = filep->private_data; - - char buf[32]; - size_t buf_size; - unsigned long long val; - int rc; + struct tool_mw_wrap *outmw_wrap = filep->private_data; + struct tool_mw *outmw = outmw_wrap->mw; + size_t buf_size, wsize; + char buf[TOOL_BUF_LEN]; + int ret, n; + u64 addr; buf_size = min(size, (sizeof(buf) - 1)); if (copy_from_user(buf, ubuf, buf_size)) @@ -819,16 +939,17 @@ static ssize_t tool_peer_mw_trans_write(struct file *filep, buf[buf_size] = '\0'; - rc = kstrtoull(buf, 0, &val); - if (rc) - return rc; - - tool_free_mw(mw->tc, mw->idx); - if (val) - rc = tool_setup_mw(mw->tc, mw->idx, val); + n = sscanf(buf, "%lli:%zi", &addr, &wsize); + if (n != 2) + return -EINVAL; - if (rc) - return rc; + tool_free_peer_mw(outmw->tc, outmw->widx); + if (wsize) { + ret = tool_setup_peer_mw(outmw->tc, outmw_wrap->pidx, + outmw->widx, addr, wsize); + if (ret) + return ret; + } return size; } @@ -837,195 +958,734 @@ static TOOL_FOPS_RDWR(tool_peer_mw_trans_fops, tool_peer_mw_trans_read, tool_peer_mw_trans_write); -static int tool_init_mw(struct tool_ctx *tc, int idx) +static int tool_init_mws(struct tool_ctx *tc) { - struct tool_mw *mw = &tc->mws[idx]; - phys_addr_t base; - int rc; - - rc = ntb_peer_mw_get_addr(tc->ntb, idx, &base, &mw->win_size); - if (rc) - return rc; - - mw->tc = tc; - mw->idx = idx; - mw->local = ioremap_wc(base, mw->win_size); - if (!mw->local) - return -EFAULT; + int widx, pidx; + + /* Initialize outbound memory windows */ + tc->outmw_cnt = ntb_peer_mw_count(tc->ntb); + tc->outmws = devm_kcalloc(&tc->ntb->dev, tc->outmw_cnt, + sizeof(*tc->outmws), GFP_KERNEL); + if (tc->outmws == NULL) + return -ENOMEM; + + for (widx = 0; widx < tc->outmw_cnt; widx++) { + tc->outmws[widx].widx = widx; + tc->outmws[widx].pidx = -1; + tc->outmws[widx].tc = tc; + } + + /* Initialize inbound memory windows and outbound MWs wrapper */ + for (pidx = 0; pidx < tc->peer_cnt; pidx++) { + tc->peers[pidx].inmw_cnt = ntb_mw_count(tc->ntb, pidx); + tc->peers[pidx].inmws = + devm_kcalloc(&tc->ntb->dev, tc->peers[pidx].inmw_cnt, + sizeof(*tc->peers[pidx].inmws), GFP_KERNEL); + if (tc->peers[pidx].inmws == NULL) + return -ENOMEM; + + for (widx = 0; widx < tc->peers[pidx].inmw_cnt; widx++) { + tc->peers[pidx].inmws[widx].widx = widx; + tc->peers[pidx].inmws[widx].pidx = pidx; + tc->peers[pidx].inmws[widx].tc = tc; + } + + tc->peers[pidx].outmw_cnt = ntb_peer_mw_count(tc->ntb); + tc->peers[pidx].outmws = + devm_kcalloc(&tc->ntb->dev, tc->peers[pidx].outmw_cnt, + sizeof(*tc->peers[pidx].outmws), GFP_KERNEL); + + for (widx = 0; widx < tc->peers[pidx].outmw_cnt; widx++) { + tc->peers[pidx].outmws[widx].pidx = pidx; + tc->peers[pidx].outmws[widx].mw = &tc->outmws[widx]; + } + } return 0; } -static void tool_free_mws(struct tool_ctx *tc) +static void tool_clear_mws(struct tool_ctx *tc) { - int i; + int widx, pidx; + + /* Free outbound memory windows */ + for (widx = 0; widx < tc->outmw_cnt; widx++) + tool_free_peer_mw(tc, widx); - for (i = 0; i < tc->mw_count; i++) { - tool_free_mw(tc, i); + /* Free outbound memory windows */ + for (pidx = 0; pidx < tc->peer_cnt; pidx++) + for (widx = 0; widx < tc->peers[pidx].inmw_cnt; widx++) + tool_free_mw(tc, pidx, widx); +} - if (tc->mws[i].local) - iounmap(tc->mws[i].local); +/*============================================================================== + * Doorbell read/write methods + *============================================================================== + */ - tc->mws[i].local = NULL; - } +static ssize_t tool_db_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_read(tc, ubuf, size, offp, tc->ntb->ops->db_read); } -static void tool_setup_dbgfs(struct tool_ctx *tc) +static ssize_t tool_db_write(struct file *filep, const char __user *ubuf, + size_t size, loff_t *offp) { - int i; + struct tool_ctx *tc = filep->private_data; - /* This modules is useless without dbgfs... */ - if (!tool_dbgfs) { - tc->dbgfs = NULL; - return; + return tool_fn_write(tc, ubuf, size, offp, tc->ntb->ops->db_set, + tc->ntb->ops->db_clear); +} + +static TOOL_FOPS_RDWR(tool_db_fops, + tool_db_read, + tool_db_write); + +static ssize_t tool_db_valid_mask_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_read(tc, ubuf, size, offp, tc->ntb->ops->db_valid_mask); +} + +static TOOL_FOPS_RDWR(tool_db_valid_mask_fops, + tool_db_valid_mask_read, + NULL); + +static ssize_t tool_db_mask_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_read(tc, ubuf, size, offp, tc->ntb->ops->db_read_mask); +} + +static ssize_t tool_db_mask_write(struct file *filep, const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_write(tc, ubuf, size, offp, tc->ntb->ops->db_set_mask, + tc->ntb->ops->db_clear_mask); +} + +static TOOL_FOPS_RDWR(tool_db_mask_fops, + tool_db_mask_read, + tool_db_mask_write); + +static ssize_t tool_peer_db_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_read(tc, ubuf, size, offp, tc->ntb->ops->peer_db_read); +} + +static ssize_t tool_peer_db_write(struct file *filep, const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_write(tc, ubuf, size, offp, tc->ntb->ops->peer_db_set, + tc->ntb->ops->peer_db_clear); +} + +static TOOL_FOPS_RDWR(tool_peer_db_fops, + tool_peer_db_read, + tool_peer_db_write); + +static ssize_t tool_peer_db_mask_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_read(tc, ubuf, size, offp, + tc->ntb->ops->peer_db_read_mask); +} + +static ssize_t tool_peer_db_mask_write(struct file *filep, + const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_write(tc, ubuf, size, offp, + tc->ntb->ops->peer_db_set_mask, + tc->ntb->ops->peer_db_clear_mask); +} + +static TOOL_FOPS_RDWR(tool_peer_db_mask_fops, + tool_peer_db_mask_read, + tool_peer_db_mask_write); + +static ssize_t tool_db_event_write(struct file *filep, + const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + u64 val; + int ret; + + ret = kstrtou64_from_user(ubuf, size, 0, &val); + if (ret) + return ret; + + if (wait_event_interruptible(tc->db_wq, ntb_db_read(tc->ntb) == val)) + return -ERESTART; + + return size; +} + +static TOOL_FOPS_RDWR(tool_db_event_fops, + NULL, + tool_db_event_write); + +/*============================================================================== + * Scratchpads read/write methods + *============================================================================== + */ + +static ssize_t tool_spad_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_spad *spad = filep->private_data; + char buf[TOOL_BUF_LEN]; + ssize_t pos; + + if (!spad->tc->ntb->ops->spad_read) + return -EINVAL; + + pos = scnprintf(buf, sizeof(buf), "%#x\n", + ntb_spad_read(spad->tc->ntb, spad->sidx)); + + return simple_read_from_buffer(ubuf, size, offp, buf, pos); +} + +static ssize_t tool_spad_write(struct file *filep, const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_spad *spad = filep->private_data; + u32 val; + int ret; + + if (!spad->tc->ntb->ops->spad_write) { + dev_dbg(&spad->tc->ntb->dev, "no spad write fn\n"); + return -EINVAL; } - tc->dbgfs = debugfs_create_dir(dev_name(&tc->ntb->dev), - tool_dbgfs); - if (!tc->dbgfs) - return; + ret = kstrtou32_from_user(ubuf, size, 0, &val); + if (ret) + return ret; - debugfs_create_file("db", S_IRUSR | S_IWUSR, tc->dbgfs, - tc, &tool_db_fops); + ret = ntb_spad_write(spad->tc->ntb, spad->sidx, val); - debugfs_create_file("mask", S_IRUSR | S_IWUSR, tc->dbgfs, - tc, &tool_mask_fops); + return ret ?: size; +} - debugfs_create_file("peer_db", S_IRUSR | S_IWUSR, tc->dbgfs, - tc, &tool_peer_db_fops); +static TOOL_FOPS_RDWR(tool_spad_fops, + tool_spad_read, + tool_spad_write); - debugfs_create_file("peer_mask", S_IRUSR | S_IWUSR, tc->dbgfs, - tc, &tool_peer_mask_fops); +static ssize_t tool_peer_spad_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_spad *spad = filep->private_data; + char buf[TOOL_BUF_LEN]; + ssize_t pos; - debugfs_create_file("spad", S_IRUSR | S_IWUSR, tc->dbgfs, - tc, &tool_spad_fops); + if (!spad->tc->ntb->ops->peer_spad_read) + return -EINVAL; - debugfs_create_file("peer_spad", S_IRUSR | S_IWUSR, tc->dbgfs, - tc, &tool_peer_spad_fops); + pos = scnprintf(buf, sizeof(buf), "%#x\n", + ntb_peer_spad_read(spad->tc->ntb, spad->pidx, spad->sidx)); - debugfs_create_file("link", S_IRUSR | S_IWUSR, tc->dbgfs, - tc, &tool_link_fops); + return simple_read_from_buffer(ubuf, size, offp, buf, pos); +} - debugfs_create_file("link_event", S_IWUSR, tc->dbgfs, - tc, &tool_link_event_fops); +static ssize_t tool_peer_spad_write(struct file *filep, const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_spad *spad = filep->private_data; + u32 val; + int ret; + + if (!spad->tc->ntb->ops->peer_spad_write) { + dev_dbg(&spad->tc->ntb->dev, "no spad write fn\n"); + return -EINVAL; + } + + ret = kstrtou32_from_user(ubuf, size, 0, &val); + if (ret) + return ret; + + ret = ntb_peer_spad_write(spad->tc->ntb, spad->pidx, spad->sidx, val); + + return ret ?: size; +} - for (i = 0; i < tc->mw_count; i++) { - char buf[30]; +static TOOL_FOPS_RDWR(tool_peer_spad_fops, + tool_peer_spad_read, + tool_peer_spad_write); - snprintf(buf, sizeof(buf), "mw%d", i); - debugfs_create_file(buf, S_IRUSR | S_IWUSR, tc->dbgfs, - &tc->mws[i], &tool_mw_fops); +static int tool_init_spads(struct tool_ctx *tc) +{ + int sidx, pidx; + + /* Initialize inbound scratchpad structures */ + tc->inspad_cnt = ntb_spad_count(tc->ntb); + tc->inspads = devm_kcalloc(&tc->ntb->dev, tc->inspad_cnt, + sizeof(*tc->inspads), GFP_KERNEL); + if (tc->inspads == NULL) + return -ENOMEM; + + for (sidx = 0; sidx < tc->inspad_cnt; sidx++) { + tc->inspads[sidx].sidx = sidx; + tc->inspads[sidx].pidx = -1; + tc->inspads[sidx].tc = tc; + } - snprintf(buf, sizeof(buf), "peer_trans%d", i); - debugfs_create_file(buf, S_IRUSR | S_IWUSR, tc->dbgfs, - &tc->mws[i], &tool_peer_mw_trans_fops); + /* Initialize outbound scratchpad structures */ + for (pidx = 0; pidx < tc->peer_cnt; pidx++) { + tc->peers[pidx].outspad_cnt = ntb_spad_count(tc->ntb); + tc->peers[pidx].outspads = + devm_kcalloc(&tc->ntb->dev, tc->peers[pidx].outspad_cnt, + sizeof(*tc->peers[pidx].outspads), GFP_KERNEL); + if (tc->peers[pidx].outspads == NULL) + return -ENOMEM; + + for (sidx = 0; sidx < tc->peers[pidx].outspad_cnt; sidx++) { + tc->peers[pidx].outspads[sidx].sidx = sidx; + tc->peers[pidx].outspads[sidx].pidx = pidx; + tc->peers[pidx].outspads[sidx].tc = tc; + } } + + return 0; } -static int tool_probe(struct ntb_client *self, struct ntb_dev *ntb) +/*============================================================================== + * Messages read/write methods + *============================================================================== + */ + +static ssize_t tool_inmsg_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) { - struct tool_ctx *tc; - int rc; - int i; + struct tool_msg *msg = filep->private_data; + char buf[TOOL_BUF_LEN]; + ssize_t pos; + u32 data; + int pidx; + + data = ntb_msg_read(msg->tc->ntb, &pidx, msg->midx); + + pos = scnprintf(buf, sizeof(buf), "0x%08x<-%d\n", data, pidx); + + return simple_read_from_buffer(ubuf, size, offp, buf, pos); +} + +static TOOL_FOPS_RDWR(tool_inmsg_fops, + tool_inmsg_read, + NULL); + +static ssize_t tool_outmsg_write(struct file *filep, + const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_msg *msg = filep->private_data; + u32 val; + int ret; + + ret = kstrtou32_from_user(ubuf, size, 0, &val); + if (ret) + return ret; + + ret = ntb_peer_msg_write(msg->tc->ntb, msg->pidx, msg->midx, val); + + return ret ? : size; +} + +static TOOL_FOPS_RDWR(tool_outmsg_fops, + NULL, + tool_outmsg_write); + +static ssize_t tool_msg_sts_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_read(tc, ubuf, size, offp, tc->ntb->ops->msg_read_sts); +} + +static ssize_t tool_msg_sts_write(struct file *filep, const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_write(tc, ubuf, size, offp, NULL, + tc->ntb->ops->msg_clear_sts); +} + +static TOOL_FOPS_RDWR(tool_msg_sts_fops, + tool_msg_sts_read, + tool_msg_sts_write); + +static ssize_t tool_msg_inbits_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_read(tc, ubuf, size, offp, tc->ntb->ops->msg_inbits); +} + +static TOOL_FOPS_RDWR(tool_msg_inbits_fops, + tool_msg_inbits_read, + NULL); - if (!ntb->ops->mw_set_trans) { - dev_dbg(&ntb->dev, "need inbound MW based NTB API\n"); - rc = -EINVAL; - goto err_tc; +static ssize_t tool_msg_outbits_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_read(tc, ubuf, size, offp, tc->ntb->ops->msg_outbits); +} + +static TOOL_FOPS_RDWR(tool_msg_outbits_fops, + tool_msg_outbits_read, + NULL); + +static ssize_t tool_msg_mask_write(struct file *filep, const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + + return tool_fn_write(tc, ubuf, size, offp, + tc->ntb->ops->msg_set_mask, + tc->ntb->ops->msg_clear_mask); +} + +static TOOL_FOPS_RDWR(tool_msg_mask_fops, + NULL, + tool_msg_mask_write); + +static ssize_t tool_msg_event_write(struct file *filep, + const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + u64 val; + int ret; + + ret = kstrtou64_from_user(ubuf, size, 0, &val); + if (ret) + return ret; + + if (wait_event_interruptible(tc->msg_wq, + ntb_msg_read_sts(tc->ntb) == val)) + return -ERESTART; + + return size; +} + +static TOOL_FOPS_RDWR(tool_msg_event_fops, + NULL, + tool_msg_event_write); + +static int tool_init_msgs(struct tool_ctx *tc) +{ + int midx, pidx; + + /* Initialize inbound message structures */ + tc->inmsg_cnt = ntb_msg_count(tc->ntb); + tc->inmsgs = devm_kcalloc(&tc->ntb->dev, tc->inmsg_cnt, + sizeof(*tc->inmsgs), GFP_KERNEL); + if (tc->inmsgs == NULL) + return -ENOMEM; + + for (midx = 0; midx < tc->inmsg_cnt; midx++) { + tc->inmsgs[midx].midx = midx; + tc->inmsgs[midx].pidx = -1; + tc->inmsgs[midx].tc = tc; } - if (ntb_spad_count(ntb) < 1) { - dev_dbg(&ntb->dev, "no enough scratchpads\n"); - rc = -EINVAL; - goto err_tc; + /* Initialize outbound message structures */ + for (pidx = 0; pidx < tc->peer_cnt; pidx++) { + tc->peers[pidx].outmsg_cnt = ntb_msg_count(tc->ntb); + tc->peers[pidx].outmsgs = + devm_kcalloc(&tc->ntb->dev, tc->peers[pidx].outmsg_cnt, + sizeof(*tc->peers[pidx].outmsgs), GFP_KERNEL); + if (tc->peers[pidx].outmsgs == NULL) + return -ENOMEM; + + for (midx = 0; midx < tc->peers[pidx].outmsg_cnt; midx++) { + tc->peers[pidx].outmsgs[midx].midx = midx; + tc->peers[pidx].outmsgs[midx].pidx = pidx; + tc->peers[pidx].outmsgs[midx].tc = tc; + } } + return 0; +} + +/*============================================================================== + * Initialization methods + *============================================================================== + */ + +static struct tool_ctx *tool_create_data(struct ntb_dev *ntb) +{ + struct tool_ctx *tc; + + tc = devm_kzalloc(&ntb->dev, sizeof(*tc), GFP_KERNEL); + if (tc == NULL) + return ERR_PTR(-ENOMEM); + + tc->ntb = ntb; + init_waitqueue_head(&tc->link_wq); + init_waitqueue_head(&tc->db_wq); + init_waitqueue_head(&tc->msg_wq); + if (ntb_db_is_unsafe(ntb)) dev_dbg(&ntb->dev, "doorbell is unsafe\n"); if (ntb_spad_is_unsafe(ntb)) dev_dbg(&ntb->dev, "scratchpad is unsafe\n"); - if (ntb_peer_port_count(ntb) != NTB_DEF_PEER_CNT) - dev_warn(&ntb->dev, "multi-port NTB is unsupported\n"); + return tc; +} + +static void tool_clear_data(struct tool_ctx *tc) +{ + wake_up(&tc->link_wq); + wake_up(&tc->db_wq); + wake_up(&tc->msg_wq); +} + +static int tool_init_ntb(struct tool_ctx *tc) +{ + return ntb_set_ctx(tc->ntb, tc, &tool_ops); +} - tc = kzalloc(sizeof(*tc), GFP_KERNEL); - if (!tc) { - rc = -ENOMEM; - goto err_tc; +static void tool_clear_ntb(struct tool_ctx *tc) +{ + ntb_clear_ctx(tc->ntb); + ntb_link_disable(tc->ntb); +} + +static void tool_setup_dbgfs(struct tool_ctx *tc) +{ + int pidx, widx, sidx, midx; + char buf[TOOL_BUF_LEN]; + + /* This modules is useless without dbgfs... */ + if (!tool_dbgfs_topdir) { + tc->dbgfs_dir = NULL; + return; } - tc->ntb = ntb; - init_waitqueue_head(&tc->link_wq); + tc->dbgfs_dir = debugfs_create_dir(dev_name(&tc->ntb->dev), + tool_dbgfs_topdir); + if (!tc->dbgfs_dir) + return; + + debugfs_create_file("port", 0600, tc->dbgfs_dir, + tc, &tool_port_fops); + + debugfs_create_file("link", 0600, tc->dbgfs_dir, + tc, &tool_link_fops); + + debugfs_create_file("db", 0600, tc->dbgfs_dir, + tc, &tool_db_fops); + + debugfs_create_file("db_valid_mask", 0600, tc->dbgfs_dir, + tc, &tool_db_valid_mask_fops); + + debugfs_create_file("db_mask", 0600, tc->dbgfs_dir, + tc, &tool_db_mask_fops); - tc->mw_count = min(ntb_peer_mw_count(tc->ntb), MAX_MWS); - for (i = 0; i < tc->mw_count; i++) { - rc = tool_init_mw(tc, i); - if (rc) - goto err_ctx; + debugfs_create_file("db_event", 0600, tc->dbgfs_dir, + tc, &tool_db_event_fops); + + debugfs_create_file("peer_db", 0600, tc->dbgfs_dir, + tc, &tool_peer_db_fops); + + debugfs_create_file("peer_db_mask", 0600, tc->dbgfs_dir, + tc, &tool_peer_db_mask_fops); + + if (tc->inspad_cnt != 0) { + for (sidx = 0; sidx < tc->inspad_cnt; sidx++) { + snprintf(buf, sizeof(buf), "spad%d", sidx); + + debugfs_create_file(buf, 0600, tc->dbgfs_dir, + &tc->inspads[sidx], &tool_spad_fops); + } } - tool_setup_dbgfs(tc); + if (tc->inmsg_cnt != 0) { + for (midx = 0; midx < tc->inmsg_cnt; midx++) { + snprintf(buf, sizeof(buf), "msg%d", midx); + debugfs_create_file(buf, 0600, tc->dbgfs_dir, + &tc->inmsgs[midx], &tool_inmsg_fops); + } + + debugfs_create_file("msg_sts", 0600, tc->dbgfs_dir, + tc, &tool_msg_sts_fops); + + debugfs_create_file("msg_inbits", 0600, tc->dbgfs_dir, + tc, &tool_msg_inbits_fops); - rc = ntb_set_ctx(ntb, tc, &tool_ops); - if (rc) - goto err_ctx; + debugfs_create_file("msg_outbits", 0600, tc->dbgfs_dir, + tc, &tool_msg_outbits_fops); - ntb_link_enable(ntb, NTB_SPEED_AUTO, NTB_WIDTH_AUTO); - ntb_link_event(ntb); + debugfs_create_file("msg_mask", 0600, tc->dbgfs_dir, + tc, &tool_msg_mask_fops); + + debugfs_create_file("msg_event", 0600, tc->dbgfs_dir, + tc, &tool_msg_event_fops); + } + + for (pidx = 0; pidx < tc->peer_cnt; pidx++) { + snprintf(buf, sizeof(buf), "peer%d", pidx); + tc->peers[pidx].dbgfs_dir = + debugfs_create_dir(buf, tc->dbgfs_dir); + + debugfs_create_file("port", 0600, + tc->peers[pidx].dbgfs_dir, + &tc->peers[pidx], &tool_peer_port_fops); + + debugfs_create_file("link", 0200, + tc->peers[pidx].dbgfs_dir, + &tc->peers[pidx], &tool_peer_link_fops); + + debugfs_create_file("link_event", 0200, + tc->peers[pidx].dbgfs_dir, + &tc->peers[pidx], &tool_peer_link_event_fops); + + for (widx = 0; widx < tc->peers[pidx].inmw_cnt; widx++) { + snprintf(buf, sizeof(buf), "mw_trans%d", widx); + debugfs_create_file(buf, 0600, + tc->peers[pidx].dbgfs_dir, + &tc->peers[pidx].inmws[widx], + &tool_mw_trans_fops); + } + + for (widx = 0; widx < tc->peers[pidx].outmw_cnt; widx++) { + snprintf(buf, sizeof(buf), "peer_mw_trans%d", widx); + debugfs_create_file(buf, 0600, + tc->peers[pidx].dbgfs_dir, + &tc->peers[pidx].outmws[widx], + &tool_peer_mw_trans_fops); + } + + for (sidx = 0; sidx < tc->peers[pidx].outspad_cnt; sidx++) { + snprintf(buf, sizeof(buf), "spad%d", sidx); + + debugfs_create_file(buf, 0600, + tc->peers[pidx].dbgfs_dir, + &tc->peers[pidx].outspads[sidx], + &tool_peer_spad_fops); + } + + for (midx = 0; midx < tc->peers[pidx].outmsg_cnt; midx++) { + snprintf(buf, sizeof(buf), "msg%d", midx); + debugfs_create_file(buf, 0600, + tc->peers[pidx].dbgfs_dir, + &tc->peers[pidx].outmsgs[midx], + &tool_outmsg_fops); + } + } +} + +static void tool_clear_dbgfs(struct tool_ctx *tc) +{ + debugfs_remove_recursive(tc->dbgfs_dir); +} + +static int tool_probe(struct ntb_client *self, struct ntb_dev *ntb) +{ + struct tool_ctx *tc; + int ret; + + tc = tool_create_data(ntb); + if (IS_ERR(tc)) + return PTR_ERR(tc); + + ret = tool_init_peers(tc); + if (ret != 0) + goto err_clear_data; + + ret = tool_init_mws(tc); + if (ret != 0) + goto err_clear_data; + + ret = tool_init_spads(tc); + if (ret != 0) + goto err_clear_mws; + + ret = tool_init_msgs(tc); + if (ret != 0) + goto err_clear_mws; + + ret = tool_init_ntb(tc); + if (ret != 0) + goto err_clear_mws; + + tool_setup_dbgfs(tc); return 0; -err_ctx: - tool_free_mws(tc); - debugfs_remove_recursive(tc->dbgfs); - kfree(tc); -err_tc: - return rc; +err_clear_mws: + tool_clear_mws(tc); + +err_clear_data: + tool_clear_data(tc); + + return ret; } static void tool_remove(struct ntb_client *self, struct ntb_dev *ntb) { struct tool_ctx *tc = ntb->ctx; - tool_free_mws(tc); + tool_clear_dbgfs(tc); - ntb_clear_ctx(ntb); - ntb_link_disable(ntb); + tool_clear_ntb(tc); - debugfs_remove_recursive(tc->dbgfs); - kfree(tc); + tool_clear_mws(tc); + + tool_clear_data(tc); } static struct ntb_client tool_client = { .ops = { .probe = tool_probe, .remove = tool_remove, - }, + } }; static int __init tool_init(void) { - int rc; + int ret; if (debugfs_initialized()) - tool_dbgfs = debugfs_create_dir(KBUILD_MODNAME, NULL); + tool_dbgfs_topdir = debugfs_create_dir(KBUILD_MODNAME, NULL); - rc = ntb_register_client(&tool_client); - if (rc) - goto err_client; + ret = ntb_register_client(&tool_client); + if (ret) + debugfs_remove_recursive(tool_dbgfs_topdir); - return 0; - -err_client: - debugfs_remove_recursive(tool_dbgfs); - return rc; + return ret; } module_init(tool_init); static void __exit tool_exit(void) { ntb_unregister_client(&tool_client); - debugfs_remove_recursive(tool_dbgfs); + debugfs_remove_recursive(tool_dbgfs_topdir); } module_exit(tool_exit); + |