From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/usb/host/xhci-debugfs.c | 726 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 726 insertions(+) create mode 100644 drivers/usb/host/xhci-debugfs.c (limited to 'drivers/usb/host/xhci-debugfs.c') diff --git a/drivers/usb/host/xhci-debugfs.c b/drivers/usb/host/xhci-debugfs.c new file mode 100644 index 000000000..bd40caeeb --- /dev/null +++ b/drivers/usb/host/xhci-debugfs.c @@ -0,0 +1,726 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * xhci-debugfs.c - xHCI debugfs interface + * + * Copyright (C) 2017 Intel Corporation + * + * Author: Lu Baolu + */ + +#include +#include + +#include "xhci.h" +#include "xhci-debugfs.h" + +static const struct debugfs_reg32 xhci_cap_regs[] = { + dump_register(CAPLENGTH), + dump_register(HCSPARAMS1), + dump_register(HCSPARAMS2), + dump_register(HCSPARAMS3), + dump_register(HCCPARAMS1), + dump_register(DOORBELLOFF), + dump_register(RUNTIMEOFF), + dump_register(HCCPARAMS2), +}; + +static const struct debugfs_reg32 xhci_op_regs[] = { + dump_register(USBCMD), + dump_register(USBSTS), + dump_register(PAGESIZE), + dump_register(DNCTRL), + dump_register(CRCR), + dump_register(DCBAAP_LOW), + dump_register(DCBAAP_HIGH), + dump_register(CONFIG), +}; + +static const struct debugfs_reg32 xhci_runtime_regs[] = { + dump_register(MFINDEX), + dump_register(IR0_IMAN), + dump_register(IR0_IMOD), + dump_register(IR0_ERSTSZ), + dump_register(IR0_ERSTBA_LOW), + dump_register(IR0_ERSTBA_HIGH), + dump_register(IR0_ERDP_LOW), + dump_register(IR0_ERDP_HIGH), +}; + +static const struct debugfs_reg32 xhci_extcap_legsup[] = { + dump_register(EXTCAP_USBLEGSUP), + dump_register(EXTCAP_USBLEGCTLSTS), +}; + +static const struct debugfs_reg32 xhci_extcap_protocol[] = { + dump_register(EXTCAP_REVISION), + dump_register(EXTCAP_NAME), + dump_register(EXTCAP_PORTINFO), + dump_register(EXTCAP_PORTTYPE), + dump_register(EXTCAP_MANTISSA1), + dump_register(EXTCAP_MANTISSA2), + dump_register(EXTCAP_MANTISSA3), + dump_register(EXTCAP_MANTISSA4), + dump_register(EXTCAP_MANTISSA5), + dump_register(EXTCAP_MANTISSA6), +}; + +static const struct debugfs_reg32 xhci_extcap_dbc[] = { + dump_register(EXTCAP_DBC_CAPABILITY), + dump_register(EXTCAP_DBC_DOORBELL), + dump_register(EXTCAP_DBC_ERSTSIZE), + dump_register(EXTCAP_DBC_ERST_LOW), + dump_register(EXTCAP_DBC_ERST_HIGH), + dump_register(EXTCAP_DBC_ERDP_LOW), + dump_register(EXTCAP_DBC_ERDP_HIGH), + dump_register(EXTCAP_DBC_CONTROL), + dump_register(EXTCAP_DBC_STATUS), + dump_register(EXTCAP_DBC_PORTSC), + dump_register(EXTCAP_DBC_CONT_LOW), + dump_register(EXTCAP_DBC_CONT_HIGH), + dump_register(EXTCAP_DBC_DEVINFO1), + dump_register(EXTCAP_DBC_DEVINFO2), +}; + +static struct dentry *xhci_debugfs_root; + +static struct xhci_regset *xhci_debugfs_alloc_regset(struct xhci_hcd *xhci) +{ + struct xhci_regset *regset; + + regset = kzalloc(sizeof(*regset), GFP_KERNEL); + if (!regset) + return NULL; + + /* + * The allocation and free of regset are executed in order. + * We needn't a lock here. + */ + INIT_LIST_HEAD(®set->list); + list_add_tail(®set->list, &xhci->regset_list); + + return regset; +} + +static void xhci_debugfs_free_regset(struct xhci_regset *regset) +{ + if (!regset) + return; + + list_del(®set->list); + kfree(regset); +} + +__printf(6, 7) +static void xhci_debugfs_regset(struct xhci_hcd *xhci, u32 base, + const struct debugfs_reg32 *regs, + size_t nregs, struct dentry *parent, + const char *fmt, ...) +{ + struct xhci_regset *rgs; + va_list args; + struct debugfs_regset32 *regset; + struct usb_hcd *hcd = xhci_to_hcd(xhci); + + rgs = xhci_debugfs_alloc_regset(xhci); + if (!rgs) + return; + + va_start(args, fmt); + vsnprintf(rgs->name, sizeof(rgs->name), fmt, args); + va_end(args); + + regset = &rgs->regset; + regset->regs = regs; + regset->nregs = nregs; + regset->base = hcd->regs + base; + regset->dev = hcd->self.controller; + + debugfs_create_regset32((const char *)rgs->name, 0444, parent, regset); +} + +static void xhci_debugfs_extcap_regset(struct xhci_hcd *xhci, int cap_id, + const struct debugfs_reg32 *regs, + size_t n, const char *cap_name) +{ + u32 offset; + int index = 0; + size_t psic, nregs = n; + void __iomem *base = &xhci->cap_regs->hc_capbase; + + offset = xhci_find_next_ext_cap(base, 0, cap_id); + while (offset) { + if (cap_id == XHCI_EXT_CAPS_PROTOCOL) { + psic = XHCI_EXT_PORT_PSIC(readl(base + offset + 8)); + nregs = min(4 + psic, n); + } + + xhci_debugfs_regset(xhci, offset, regs, nregs, + xhci->debugfs_root, "%s:%02d", + cap_name, index); + offset = xhci_find_next_ext_cap(base, offset, cap_id); + index++; + } +} + +static int xhci_ring_enqueue_show(struct seq_file *s, void *unused) +{ + dma_addr_t dma; + struct xhci_ring *ring = *(struct xhci_ring **)s->private; + + dma = xhci_trb_virt_to_dma(ring->enq_seg, ring->enqueue); + seq_printf(s, "%pad\n", &dma); + + return 0; +} + +static int xhci_ring_dequeue_show(struct seq_file *s, void *unused) +{ + dma_addr_t dma; + struct xhci_ring *ring = *(struct xhci_ring **)s->private; + + dma = xhci_trb_virt_to_dma(ring->deq_seg, ring->dequeue); + seq_printf(s, "%pad\n", &dma); + + return 0; +} + +static int xhci_ring_cycle_show(struct seq_file *s, void *unused) +{ + struct xhci_ring *ring = *(struct xhci_ring **)s->private; + + seq_printf(s, "%d\n", ring->cycle_state); + + return 0; +} + +static void xhci_ring_dump_segment(struct seq_file *s, + struct xhci_segment *seg) +{ + int i; + dma_addr_t dma; + union xhci_trb *trb; + char str[XHCI_MSG_MAX]; + + for (i = 0; i < TRBS_PER_SEGMENT; i++) { + trb = &seg->trbs[i]; + dma = seg->dma + i * sizeof(*trb); + seq_printf(s, "%pad: %s\n", &dma, + xhci_decode_trb(str, XHCI_MSG_MAX, le32_to_cpu(trb->generic.field[0]), + le32_to_cpu(trb->generic.field[1]), + le32_to_cpu(trb->generic.field[2]), + le32_to_cpu(trb->generic.field[3]))); + } +} + +static int xhci_ring_trb_show(struct seq_file *s, void *unused) +{ + int i; + struct xhci_ring *ring = *(struct xhci_ring **)s->private; + struct xhci_segment *seg = ring->first_seg; + + for (i = 0; i < ring->num_segs; i++) { + xhci_ring_dump_segment(s, seg); + seg = seg->next; + } + + return 0; +} + +static struct xhci_file_map ring_files[] = { + {"enqueue", xhci_ring_enqueue_show, }, + {"dequeue", xhci_ring_dequeue_show, }, + {"cycle", xhci_ring_cycle_show, }, + {"trbs", xhci_ring_trb_show, }, +}; + +static int xhci_ring_open(struct inode *inode, struct file *file) +{ + int i; + struct xhci_file_map *f_map; + const char *file_name = file_dentry(file)->d_iname; + + for (i = 0; i < ARRAY_SIZE(ring_files); i++) { + f_map = &ring_files[i]; + + if (strcmp(f_map->name, file_name) == 0) + break; + } + + return single_open(file, f_map->show, inode->i_private); +} + +static const struct file_operations xhci_ring_fops = { + .open = xhci_ring_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int xhci_slot_context_show(struct seq_file *s, void *unused) +{ + struct xhci_hcd *xhci; + struct xhci_slot_ctx *slot_ctx; + struct xhci_slot_priv *priv = s->private; + struct xhci_virt_device *dev = priv->dev; + char str[XHCI_MSG_MAX]; + + xhci = hcd_to_xhci(bus_to_hcd(dev->udev->bus)); + slot_ctx = xhci_get_slot_ctx(xhci, dev->out_ctx); + seq_printf(s, "%pad: %s\n", &dev->out_ctx->dma, + xhci_decode_slot_context(str, + le32_to_cpu(slot_ctx->dev_info), + le32_to_cpu(slot_ctx->dev_info2), + le32_to_cpu(slot_ctx->tt_info), + le32_to_cpu(slot_ctx->dev_state))); + + return 0; +} + +static int xhci_endpoint_context_show(struct seq_file *s, void *unused) +{ + int ep_index; + dma_addr_t dma; + struct xhci_hcd *xhci; + struct xhci_ep_ctx *ep_ctx; + struct xhci_slot_priv *priv = s->private; + struct xhci_virt_device *dev = priv->dev; + char str[XHCI_MSG_MAX]; + + xhci = hcd_to_xhci(bus_to_hcd(dev->udev->bus)); + + for (ep_index = 0; ep_index < 31; ep_index++) { + ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index); + dma = dev->out_ctx->dma + (ep_index + 1) * CTX_SIZE(xhci->hcc_params); + seq_printf(s, "%pad: %s\n", &dma, + xhci_decode_ep_context(str, + le32_to_cpu(ep_ctx->ep_info), + le32_to_cpu(ep_ctx->ep_info2), + le64_to_cpu(ep_ctx->deq), + le32_to_cpu(ep_ctx->tx_info))); + } + + return 0; +} + +static int xhci_device_name_show(struct seq_file *s, void *unused) +{ + struct xhci_slot_priv *priv = s->private; + struct xhci_virt_device *dev = priv->dev; + + seq_printf(s, "%s\n", dev_name(&dev->udev->dev)); + + return 0; +} + +static struct xhci_file_map context_files[] = { + {"name", xhci_device_name_show, }, + {"slot-context", xhci_slot_context_show, }, + {"ep-context", xhci_endpoint_context_show, }, +}; + +static int xhci_context_open(struct inode *inode, struct file *file) +{ + int i; + struct xhci_file_map *f_map; + const char *file_name = file_dentry(file)->d_iname; + + for (i = 0; i < ARRAY_SIZE(context_files); i++) { + f_map = &context_files[i]; + + if (strcmp(f_map->name, file_name) == 0) + break; + } + + return single_open(file, f_map->show, inode->i_private); +} + +static const struct file_operations xhci_context_fops = { + .open = xhci_context_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + + + +static int xhci_portsc_show(struct seq_file *s, void *unused) +{ + struct xhci_port *port = s->private; + u32 portsc; + char str[XHCI_MSG_MAX]; + + portsc = readl(port->addr); + seq_printf(s, "%s\n", xhci_decode_portsc(str, portsc)); + + return 0; +} + +static int xhci_port_open(struct inode *inode, struct file *file) +{ + return single_open(file, xhci_portsc_show, inode->i_private); +} + +static ssize_t xhci_port_write(struct file *file, const char __user *ubuf, + size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct xhci_port *port = s->private; + struct xhci_hcd *xhci = hcd_to_xhci(port->rhub->hcd); + char buf[32]; + u32 portsc; + unsigned long flags; + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (!strncmp(buf, "compliance", 10)) { + /* If CTC is clear, compliance is enabled by default */ + if (!HCC2_CTC(xhci->hcc_params2)) + return count; + spin_lock_irqsave(&xhci->lock, flags); + /* compliance mode can only be enabled on ports in RxDetect */ + portsc = readl(port->addr); + if ((portsc & PORT_PLS_MASK) != XDEV_RXDETECT) { + spin_unlock_irqrestore(&xhci->lock, flags); + return -EPERM; + } + portsc = xhci_port_state_to_neutral(portsc); + portsc &= ~PORT_PLS_MASK; + portsc |= PORT_LINK_STROBE | XDEV_COMP_MODE; + writel(portsc, port->addr); + spin_unlock_irqrestore(&xhci->lock, flags); + } else { + return -EINVAL; + } + return count; +} + +static const struct file_operations port_fops = { + .open = xhci_port_open, + .write = xhci_port_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static void xhci_debugfs_create_files(struct xhci_hcd *xhci, + struct xhci_file_map *files, + size_t nentries, void *data, + struct dentry *parent, + const struct file_operations *fops) +{ + int i; + + for (i = 0; i < nentries; i++) + debugfs_create_file(files[i].name, 0444, parent, data, fops); +} + +static struct dentry *xhci_debugfs_create_ring_dir(struct xhci_hcd *xhci, + struct xhci_ring **ring, + const char *name, + struct dentry *parent) +{ + struct dentry *dir; + + dir = debugfs_create_dir(name, parent); + xhci_debugfs_create_files(xhci, ring_files, ARRAY_SIZE(ring_files), + ring, dir, &xhci_ring_fops); + + return dir; +} + +static void xhci_debugfs_create_context_files(struct xhci_hcd *xhci, + struct dentry *parent, + int slot_id) +{ + struct xhci_virt_device *dev = xhci->devs[slot_id]; + + xhci_debugfs_create_files(xhci, context_files, + ARRAY_SIZE(context_files), + dev->debugfs_private, + parent, &xhci_context_fops); +} + +void xhci_debugfs_create_endpoint(struct xhci_hcd *xhci, + struct xhci_virt_device *dev, + int ep_index) +{ + struct xhci_ep_priv *epriv; + struct xhci_slot_priv *spriv = dev->debugfs_private; + + if (!spriv) + return; + + if (spriv->eps[ep_index]) + return; + + epriv = kzalloc(sizeof(*epriv), GFP_KERNEL); + if (!epriv) + return; + + epriv->show_ring = dev->eps[ep_index].ring; + + snprintf(epriv->name, sizeof(epriv->name), "ep%02d", ep_index); + epriv->root = xhci_debugfs_create_ring_dir(xhci, + &epriv->show_ring, + epriv->name, + spriv->root); + spriv->eps[ep_index] = epriv; +} + +void xhci_debugfs_remove_endpoint(struct xhci_hcd *xhci, + struct xhci_virt_device *dev, + int ep_index) +{ + struct xhci_ep_priv *epriv; + struct xhci_slot_priv *spriv = dev->debugfs_private; + + if (!spriv || !spriv->eps[ep_index]) + return; + + epriv = spriv->eps[ep_index]; + debugfs_remove_recursive(epriv->root); + spriv->eps[ep_index] = NULL; + kfree(epriv); +} + +static int xhci_stream_id_show(struct seq_file *s, void *unused) +{ + struct xhci_ep_priv *epriv = s->private; + + if (!epriv->stream_info) + return -EPERM; + + seq_printf(s, "Show stream ID %d trb ring, supported [1 - %d]\n", + epriv->stream_id, epriv->stream_info->num_streams - 1); + + return 0; +} + +static int xhci_stream_id_open(struct inode *inode, struct file *file) +{ + return single_open(file, xhci_stream_id_show, inode->i_private); +} + +static ssize_t xhci_stream_id_write(struct file *file, const char __user *ubuf, + size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct xhci_ep_priv *epriv = s->private; + int ret; + u16 stream_id; /* MaxPStreams + 1 <= 16 */ + + if (!epriv->stream_info) + return -EPERM; + + /* Decimal number */ + ret = kstrtou16_from_user(ubuf, count, 10, &stream_id); + if (ret) + return ret; + + if (stream_id == 0 || stream_id >= epriv->stream_info->num_streams) + return -EINVAL; + + epriv->stream_id = stream_id; + epriv->show_ring = epriv->stream_info->stream_rings[stream_id]; + + return count; +} + +static const struct file_operations stream_id_fops = { + .open = xhci_stream_id_open, + .write = xhci_stream_id_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int xhci_stream_context_array_show(struct seq_file *s, void *unused) +{ + struct xhci_ep_priv *epriv = s->private; + struct xhci_stream_ctx *stream_ctx; + dma_addr_t dma; + int id; + + if (!epriv->stream_info) + return -EPERM; + + seq_printf(s, "Allocated %d streams and %d stream context array entries\n", + epriv->stream_info->num_streams, + epriv->stream_info->num_stream_ctxs); + + for (id = 0; id < epriv->stream_info->num_stream_ctxs; id++) { + stream_ctx = epriv->stream_info->stream_ctx_array + id; + dma = epriv->stream_info->ctx_array_dma + id * 16; + if (id < epriv->stream_info->num_streams) + seq_printf(s, "%pad stream id %d deq %016llx\n", &dma, + id, le64_to_cpu(stream_ctx->stream_ring)); + else + seq_printf(s, "%pad stream context entry not used deq %016llx\n", + &dma, le64_to_cpu(stream_ctx->stream_ring)); + } + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(xhci_stream_context_array); + +void xhci_debugfs_create_stream_files(struct xhci_hcd *xhci, + struct xhci_virt_device *dev, + int ep_index) +{ + struct xhci_slot_priv *spriv = dev->debugfs_private; + struct xhci_ep_priv *epriv; + + if (!spriv || !spriv->eps[ep_index] || + !dev->eps[ep_index].stream_info) + return; + + epriv = spriv->eps[ep_index]; + epriv->stream_info = dev->eps[ep_index].stream_info; + + /* Show trb ring of stream ID 1 by default */ + epriv->stream_id = 1; + epriv->show_ring = epriv->stream_info->stream_rings[1]; + debugfs_create_file("stream_id", 0644, + epriv->root, epriv, + &stream_id_fops); + debugfs_create_file("stream_context_array", 0444, + epriv->root, epriv, + &xhci_stream_context_array_fops); +} + +void xhci_debugfs_create_slot(struct xhci_hcd *xhci, int slot_id) +{ + struct xhci_slot_priv *priv; + struct xhci_virt_device *dev = xhci->devs[slot_id]; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return; + + snprintf(priv->name, sizeof(priv->name), "%02d", slot_id); + priv->root = debugfs_create_dir(priv->name, xhci->debugfs_slots); + priv->dev = dev; + dev->debugfs_private = priv; + + xhci_debugfs_create_ring_dir(xhci, &dev->eps[0].ring, + "ep00", priv->root); + + xhci_debugfs_create_context_files(xhci, priv->root, slot_id); +} + +void xhci_debugfs_remove_slot(struct xhci_hcd *xhci, int slot_id) +{ + int i; + struct xhci_slot_priv *priv; + struct xhci_virt_device *dev = xhci->devs[slot_id]; + + if (!dev || !dev->debugfs_private) + return; + + priv = dev->debugfs_private; + + debugfs_remove_recursive(priv->root); + + for (i = 0; i < 31; i++) + kfree(priv->eps[i]); + + kfree(priv); + dev->debugfs_private = NULL; +} + +static void xhci_debugfs_create_ports(struct xhci_hcd *xhci, + struct dentry *parent) +{ + unsigned int num_ports; + char port_name[8]; + struct xhci_port *port; + struct dentry *dir; + + num_ports = HCS_MAX_PORTS(xhci->hcs_params1); + + parent = debugfs_create_dir("ports", parent); + + while (num_ports--) { + scnprintf(port_name, sizeof(port_name), "port%02d", + num_ports + 1); + dir = debugfs_create_dir(port_name, parent); + port = &xhci->hw_ports[num_ports]; + debugfs_create_file("portsc", 0644, dir, port, &port_fops); + } +} + +void xhci_debugfs_init(struct xhci_hcd *xhci) +{ + struct device *dev = xhci_to_hcd(xhci)->self.controller; + + xhci->debugfs_root = debugfs_create_dir(dev_name(dev), + xhci_debugfs_root); + + INIT_LIST_HEAD(&xhci->regset_list); + + xhci_debugfs_regset(xhci, + 0, + xhci_cap_regs, ARRAY_SIZE(xhci_cap_regs), + xhci->debugfs_root, "reg-cap"); + + xhci_debugfs_regset(xhci, + HC_LENGTH(readl(&xhci->cap_regs->hc_capbase)), + xhci_op_regs, ARRAY_SIZE(xhci_op_regs), + xhci->debugfs_root, "reg-op"); + + xhci_debugfs_regset(xhci, + readl(&xhci->cap_regs->run_regs_off) & RTSOFF_MASK, + xhci_runtime_regs, ARRAY_SIZE(xhci_runtime_regs), + xhci->debugfs_root, "reg-runtime"); + + xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_LEGACY, + xhci_extcap_legsup, + ARRAY_SIZE(xhci_extcap_legsup), + "reg-ext-legsup"); + + xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_PROTOCOL, + xhci_extcap_protocol, + ARRAY_SIZE(xhci_extcap_protocol), + "reg-ext-protocol"); + + xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_DEBUG, + xhci_extcap_dbc, + ARRAY_SIZE(xhci_extcap_dbc), + "reg-ext-dbc"); + + xhci_debugfs_create_ring_dir(xhci, &xhci->cmd_ring, + "command-ring", + xhci->debugfs_root); + + xhci_debugfs_create_ring_dir(xhci, &xhci->event_ring, + "event-ring", + xhci->debugfs_root); + + xhci->debugfs_slots = debugfs_create_dir("devices", xhci->debugfs_root); + + xhci_debugfs_create_ports(xhci, xhci->debugfs_root); +} + +void xhci_debugfs_exit(struct xhci_hcd *xhci) +{ + struct xhci_regset *rgs, *tmp; + + debugfs_remove_recursive(xhci->debugfs_root); + xhci->debugfs_root = NULL; + xhci->debugfs_slots = NULL; + + list_for_each_entry_safe(rgs, tmp, &xhci->regset_list, list) + xhci_debugfs_free_regset(rgs); +} + +void __init xhci_debugfs_create_root(void) +{ + xhci_debugfs_root = debugfs_create_dir("xhci", usb_debug_root); +} + +void __exit xhci_debugfs_remove_root(void) +{ + debugfs_remove_recursive(xhci_debugfs_root); + xhci_debugfs_root = NULL; +} -- cgit v1.2.3