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HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR07MB4714 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Laszczak Pawel --- drivers/usb/usbssp/gadget-debugfs.c | 514 ++++++++++++++++++++++++++++ drivers/usb/usbssp/gadget-debugfs.h | 137 ++++++++ 2 files changed, 651 insertions(+) create mode 100644 drivers/usb/usbssp/gadget-debugfs.c create mode 100644 drivers/usb/usbssp/gadget-debugfs.h diff --git a/drivers/usb/usbssp/gadget-debugfs.c b/drivers/usb/usbssp/gadget-debugfs.c new file mode 100644 index 000000000000..c0d1e96728e6 --- /dev/null +++ b/drivers/usb/usbssp/gadget-debugfs.c @@ -0,0 +1,514 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * USBSSP device controller driver + * + * Copyright (C) 2018 Cadence. + * + * Author: Pawel Laszczak + * Some code borrowed from the Linux XHCI driver. + */ + +#include + +#include "gadget.h" +#include "gadget-debugfs.h" + +static const struct debugfs_reg32 usbssp_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 usbssp_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 usbssp_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 usbssp_extcap_legsup[] = { + dump_register(EXTCAP_USBLEGSUP), + dump_register(EXTCAP_USBLEGCTLSTS), +}; + +static const struct debugfs_reg32 usbssp_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 usbssp_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 *usbssp_debugfs_root; + +static struct usbssp_regset *usbssp_debugfs_alloc_regset( + struct usbssp_udc *usbssp_data) +{ + struct usbssp_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, &usbssp_data->regset_list); + + return regset; +} + +static void usbssp_debugfs_free_regset(struct usbssp_regset *regset) +{ + if (!regset) + return; + + list_del(®set->list); + kfree(regset); +} + +static void usbssp_debugfs_regset(struct usbssp_udc *usbssp_data, u32 base, + const struct debugfs_reg32 *regs, + size_t nregs, struct dentry *parent, + const char *fmt, ...) +{ + struct usbssp_regset *rgs; + va_list args; + struct debugfs_regset32 *regset; + + rgs = usbssp_debugfs_alloc_regset(usbssp_data); + 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 = usbssp_data->regs + base; + + debugfs_create_regset32((const char *)rgs->name, 0444, parent, regset); +} + +static void usbssp_debugfs_extcap_regset(struct usbssp_udc *usbssp_data, + 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 = &usbssp_data->cap_regs->hc_capbase; + + offset = usbssp_find_next_ext_cap(base, 0, cap_id); + while (offset) { + if (cap_id == USBSSP_EXT_CAPS_PROTOCOL) { + psic = USBSSP_EXT_PORT_PSIC(readl(base + offset + 8)); + nregs = min(4 + psic, n); + } + + usbssp_debugfs_regset(usbssp_data, offset, regs, nregs, + usbssp_data->debugfs_root, "%s:%02d", + cap_name, index); + offset = usbssp_find_next_ext_cap(base, offset, cap_id); + index++; + } +} + +static int usbssp_ring_enqueue_show(struct seq_file *s, void *unused) +{ + dma_addr_t dma; + struct usbssp_ring *ring = *(struct usbssp_ring **)s->private; + + dma = usbssp_trb_virt_to_dma(ring->enq_seg, ring->enqueue); + seq_printf(s, "%pad\n", &dma); + + return 0; +} + +static int usbssp_ring_dequeue_show(struct seq_file *s, void *unused) +{ + dma_addr_t dma; + struct usbssp_ring *ring = *(struct usbssp_ring **)s->private; + + dma = usbssp_trb_virt_to_dma(ring->deq_seg, ring->dequeue); + seq_printf(s, "%pad\n", &dma); + + return 0; +} + +static int usbssp_ring_cycle_show(struct seq_file *s, void *unused) +{ + struct usbssp_ring *ring = *(struct usbssp_ring **)s->private; + + seq_printf(s, "%d\n", ring->cycle_state); + + return 0; +} + +static void usbssp_ring_dump_segment(struct seq_file *s, + struct usbssp_segment *seg) +{ + int i; + dma_addr_t dma; + union usbssp_trb *trb; + + 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, + usbssp_decode_trb(trb->generic.field[0], + trb->generic.field[1], + trb->generic.field[2], + trb->generic.field[3])); + } +} + +static int usbssp_ring_trb_show(struct seq_file *s, void *unused) +{ + int i; + struct usbssp_ring *ring = *(struct usbssp_ring **)s->private; + struct usbssp_segment *seg = ring->first_seg; + + for (i = 0; i < ring->num_segs; i++) { + usbssp_ring_dump_segment(s, seg); + seg = seg->next; + } + + return 0; +} + +static struct usbssp_file_map ring_files[] = { + {"enqueue", usbssp_ring_enqueue_show, }, + {"dequeue", usbssp_ring_dequeue_show, }, + {"cycle", usbssp_ring_cycle_show, }, + {"trbs", usbssp_ring_trb_show, }, +}; + +static int usbssp_ring_open(struct inode *inode, struct file *file) +{ + int i; + struct usbssp_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); + return 0; +} + +static const struct file_operations usbssp_ring_fops = { + .open = usbssp_ring_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int usbssp_slot_context_show(struct seq_file *s, void *unused) +{ + struct usbssp_udc *usbssp_data; + struct usbssp_slot_ctx *slot_ctx; + struct usbssp_slot_priv *priv = s->private; + struct usbssp_device *dev = priv->dev; + + usbssp_data = gadget_to_usbssp(dev->gadget); + slot_ctx = usbssp_get_slot_ctx(usbssp_data, dev->out_ctx); + seq_printf(s, "%pad: %s\n", &dev->out_ctx->dma, + usbssp_decode_slot_context(slot_ctx->dev_info, + slot_ctx->dev_info2, slot_ctx->int_target, + slot_ctx->dev_state)); + + return 0; +} + +static int usbssp_endpoint_context_show(struct seq_file *s, void *unused) +{ + int dci; + dma_addr_t dma; + struct usbssp_udc *usbssp_data; + struct usbssp_ep_ctx *ep_ctx; + struct usbssp_slot_priv *priv = s->private; + struct usbssp_device *dev = priv->dev; + + usbssp_data = gadget_to_usbssp(dev->gadget); + + for (dci = 1; dci < 32; dci++) { + ep_ctx = usbssp_get_ep_ctx(usbssp_data, dev->out_ctx, dci); + dma = dev->out_ctx->dma + + dci * CTX_SIZE(usbssp_data->hcc_params); + seq_printf(s, "%pad: %s\n", &dma, + usbssp_decode_ep_context(ep_ctx->ep_info, + ep_ctx->ep_info2, ep_ctx->deq, + ep_ctx->tx_info)); + } + + return 0; +} + +static int usbssp_device_name_show(struct seq_file *s, void *unused) +{ + struct usbssp_slot_priv *priv = s->private; + struct usbssp_device *dev = priv->dev; + + seq_printf(s, "%s\n", dev_name(&dev->gadget->dev)); + + return 0; +} + +static struct usbssp_file_map context_files[] = { + {"name", usbssp_device_name_show, }, + {"slot-context", usbssp_slot_context_show, }, + {"ep-context", usbssp_endpoint_context_show, }, +}; + +static int usbssp_context_open(struct inode *inode, struct file *file) +{ + int i; + struct usbssp_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 usbssp_context_fops = { + .open = usbssp_context_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static void usbssp_debugfs_create_files(struct usbssp_udc *usbssp_data, + struct usbssp_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 *usbssp_debugfs_create_ring_dir(struct usbssp_udc + *usbssp_data, + struct usbssp_ring **ring, + const char *name, + struct dentry *parent) +{ + struct dentry *dir; + + dir = debugfs_create_dir(name, parent); + usbssp_debugfs_create_files(usbssp_data, ring_files, + ARRAY_SIZE(ring_files), ring, dir, &usbssp_ring_fops); + + return dir; +} + +static void usbssp_debugfs_create_context_files(struct usbssp_udc *usbssp_data, + struct dentry *parent, + int slot_id) +{ + struct usbssp_device *dev = &usbssp_data->devs; + + usbssp_debugfs_create_files(usbssp_data, context_files, + ARRAY_SIZE(context_files), dev->debugfs_private, + parent, &usbssp_context_fops); +} + +void usbssp_debugfs_create_endpoint(struct usbssp_udc *usbssp_data, + struct usbssp_device *dev, + int ep_index) +{ + struct usbssp_ep_priv *epriv; + struct usbssp_slot_priv *spriv = dev->debugfs_private; + + if (spriv->eps[ep_index]) + return; + + epriv = kzalloc(sizeof(*epriv), GFP_KERNEL); + if (!epriv) + return; + + snprintf(epriv->name, sizeof(epriv->name), "ep%02d", ep_index); + epriv->root = usbssp_debugfs_create_ring_dir(usbssp_data, + &dev->eps[ep_index].ring, epriv->name, + spriv->root); + spriv->eps[ep_index] = epriv; +} + +void usbssp_debugfs_remove_endpoint(struct usbssp_udc *usbssp_data, + struct usbssp_device *dev, + int ep_index) +{ + struct usbssp_ep_priv *epriv; + struct usbssp_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); +} + +void usbssp_debugfs_create_slot(struct usbssp_udc *usbssp_data, int slot_id) +{ + struct usbssp_slot_priv *priv; + struct usbssp_device *dev = &usbssp_data->devs; + + priv = kzalloc(sizeof(*priv), GFP_ATOMIC); + if (!priv) + return; + + snprintf(priv->name, sizeof(priv->name), "%02d", slot_id); + priv->root = debugfs_create_dir(priv->name, usbssp_data->debugfs_slots); + priv->dev = dev; + dev->debugfs_private = priv; + + usbssp_debugfs_create_ring_dir(usbssp_data, &dev->eps[0].ring, + "ep00", priv->root); + + usbssp_debugfs_create_context_files(usbssp_data, priv->root, slot_id); +} + +void usbssp_debugfs_remove_slot(struct usbssp_udc *usbssp_data, int slot_id) +{ + int i; + struct usbssp_slot_priv *priv; + struct usbssp_device *dev = &usbssp_data->devs; + + 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; +} + +void usbssp_debugfs_init(struct usbssp_udc *usbssp_data) +{ + struct device *dev = usbssp_data->dev; + + usbssp_data->debugfs_root = debugfs_create_dir(dev_name(dev), + usbssp_debugfs_root); + + INIT_LIST_HEAD(&usbssp_data->regset_list); + + usbssp_debugfs_regset(usbssp_data, + 0, usbssp_cap_regs, ARRAY_SIZE(usbssp_cap_regs), + usbssp_data->debugfs_root, "reg-cap"); + + usbssp_debugfs_regset(usbssp_data, + HC_LENGTH(readl(&usbssp_data->cap_regs->hc_capbase)), + usbssp_op_regs, ARRAY_SIZE(usbssp_op_regs), + usbssp_data->debugfs_root, "reg-op"); + + usbssp_debugfs_regset(usbssp_data, + readl(&usbssp_data->cap_regs->run_regs_off) & RTSOFF_MASK, + usbssp_runtime_regs, ARRAY_SIZE(usbssp_runtime_regs), + usbssp_data->debugfs_root, "reg-runtime"); + + usbssp_debugfs_extcap_regset(usbssp_data, USBSSP_EXT_CAPS_PROTOCOL, + usbssp_extcap_protocol, + ARRAY_SIZE(usbssp_extcap_protocol), + "reg-ext-protocol"); + + usbssp_debugfs_create_ring_dir(usbssp_data, &usbssp_data->cmd_ring, + "command-ring", + usbssp_data->debugfs_root); + + usbssp_debugfs_create_ring_dir(usbssp_data, &usbssp_data->event_ring, + "event-ring", + usbssp_data->debugfs_root); + + usbssp_data->debugfs_slots = debugfs_create_dir("devices", + usbssp_data->debugfs_root); +} + +void usbssp_debugfs_exit(struct usbssp_udc *usbssp_data) +{ + struct usbssp_regset *rgs, *tmp; + + debugfs_remove_recursive(usbssp_data->debugfs_root); + usbssp_data->debugfs_root = NULL; + usbssp_data->debugfs_slots = NULL; + + list_for_each_entry_safe(rgs, tmp, &usbssp_data->regset_list, list) + usbssp_debugfs_free_regset(rgs); +} + +void __init usbssp_debugfs_create_root(void) +{ + usbssp_debugfs_root = debugfs_create_dir("usbssp", usb_debug_root); +} + +void __exit usbssp_debugfs_remove_root(void) +{ + debugfs_remove_recursive(usbssp_debugfs_root); + usbssp_debugfs_root = NULL; +} diff --git a/drivers/usb/usbssp/gadget-debugfs.h b/drivers/usb/usbssp/gadget-debugfs.h new file mode 100644 index 000000000000..53adb028e7f2 --- /dev/null +++ b/drivers/usb/usbssp/gadget-debugfs.h @@ -0,0 +1,137 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * USBSSP device controller driver + * + * Copyright (C) 2018 Cadence. + * + * Author: Pawel Laszczak + * Some code borrowed from the Linux XHCI driver. + */ + +#ifndef __LINUX_USBSSP_DEBUGFS_H +#define __LINUX_USBSSP_DEBUGFS_H + +#include + +#define DEBUGFS_NAMELEN 32 + +#define REG_CAPLENGTH 0x00 +#define REG_HCSPARAMS1 0x04 +#define REG_HCSPARAMS2 0x08 +#define REG_HCSPARAMS3 0x0c +#define REG_HCCPARAMS1 0x10 +#define REG_DOORBELLOFF 0x14 +#define REG_RUNTIMEOFF 0x18 +#define REG_HCCPARAMS2 0x1c + +#define REG_USBCMD 0x00 +#define REG_USBSTS 0x04 +#define REG_PAGESIZE 0x08 +#define REG_DNCTRL 0x14 +#define REG_CRCR 0x18 +#define REG_DCBAAP_LOW 0x30 +#define REG_DCBAAP_HIGH 0x34 +#define REG_CONFIG 0x38 + +#define REG_MFINDEX 0x00 +#define REG_IR0_IMAN 0x20 +#define REG_IR0_IMOD 0x24 +#define REG_IR0_ERSTSZ 0x28 +#define REG_IR0_ERSTBA_LOW 0x30 +#define REG_IR0_ERSTBA_HIGH 0x34 +#define REG_IR0_ERDP_LOW 0x38 +#define REG_IR0_ERDP_HIGH 0x3c + +#define REG_EXTCAP_USBLEGSUP 0x00 +#define REG_EXTCAP_USBLEGCTLSTS 0x04 + +#define REG_EXTCAP_REVISION 0x00 +#define REG_EXTCAP_NAME 0x04 +#define REG_EXTCAP_PORTINFO 0x08 +#define REG_EXTCAP_PORTTYPE 0x0c +#define REG_EXTCAP_MANTISSA1 0x10 +#define REG_EXTCAP_MANTISSA2 0x14 +#define REG_EXTCAP_MANTISSA3 0x18 +#define REG_EXTCAP_MANTISSA4 0x1c +#define REG_EXTCAP_MANTISSA5 0x20 +#define REG_EXTCAP_MANTISSA6 0x24 + +#define REG_EXTCAP_DBC_CAPABILITY 0x00 +#define REG_EXTCAP_DBC_DOORBELL 0x04 +#define REG_EXTCAP_DBC_ERSTSIZE 0x08 +#define REG_EXTCAP_DBC_ERST_LOW 0x10 +#define REG_EXTCAP_DBC_ERST_HIGH 0x14 +#define REG_EXTCAP_DBC_ERDP_LOW 0x18 +#define REG_EXTCAP_DBC_ERDP_HIGH 0x1c +#define REG_EXTCAP_DBC_CONTROL 0x20 +#define REG_EXTCAP_DBC_STATUS 0x24 +#define REG_EXTCAP_DBC_PORTSC 0x28 +#define REG_EXTCAP_DBC_CONT_LOW 0x30 +#define REG_EXTCAP_DBC_CONT_HIGH 0x34 +#define REG_EXTCAP_DBC_DEVINFO1 0x38 +#define REG_EXTCAP_DBC_DEVINFO2 0x3c + +#define dump_register(nm) \ +{ \ + .name = __stringify(nm), \ + .offset = REG_ ##nm, \ +} + +struct usbssp_regset { + char name[DEBUGFS_NAMELEN]; + struct debugfs_regset32 regset; + size_t nregs; + struct dentry *parent; + struct list_head list; +}; + +struct usbssp_file_map { + const char *name; + int (*show)(struct seq_file *s, void *unused); +}; + +struct usbssp_ep_priv { + char name[DEBUGFS_NAMELEN]; + struct dentry *root; +}; + +struct usbssp_slot_priv { + char name[DEBUGFS_NAMELEN]; + struct dentry *root; + struct usbssp_ep_priv *eps[31]; + struct usbssp_device *dev; +}; + +#ifdef CONFIG_DEBUG_FS +void usbssp_debugfs_init(struct usbssp_udc *usbssp_data); +void usbssp_debugfs_exit(struct usbssp_udc *usbssp_data); +void __init usbssp_debugfs_create_root(void); +void __exit usbssp_debugfs_remove_root(void); +void usbssp_debugfs_create_slot(struct usbssp_udc *usbssp_data, int slot_id); +void usbssp_debugfs_remove_slot(struct usbssp_udc *usbssp_data, int slot_id); +void usbssp_debugfs_create_endpoint(struct usbssp_udc *usbssp_data, + struct usbssp_device *dev_priv, + int ep_index); +void usbssp_debugfs_remove_endpoint(struct usbssp_udc *usbssp_data, + struct usbssp_device *dev_priv, + int ep_index); +#else +static inline void usbssp_debugfs_init(struct usbssp_udc *usbssp_data) { } +static inline void usbssp_debugfs_exit(struct usbssp_udc *usbssp_data) { } +static inline void __init usbssp_debugfs_create_root(void) { } +static inline void __exit usbssp_debugfs_remove_root(void) { } +static inline void usbssp_debugfs_create_slot(struct usbssp_udc *usbssp_data, + int s) { } +static inline void usbssp_debugfs_remove_slot(struct usbssp_udc *xusbssp_data, + int s) { } +static inline void +usbssp_debugfs_create_endpoint(struct usbssp_udc *usbssp_data, + struct usbssp_device *dev_priv, + int ep_index) { } +static inline void +usbssp_debugfs_remove_endpoint(struct usbssp_udc *usbssp_data, + struct usbssp_device *dev_priv, + int ep_index) { } +#endif /* CONFIG_DEBUG_FS */ +#endif /*__LINUX_USBSSP_DEBUGFS_H*/ -- 2.17.1