lkml.org 
[lkml]   [2018]   [Jul]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 14/31] usb: usbssp: added procedure handling command completion events.
Date
This patch extends the usbssp_handle_event function with a new case,
that is responsible for servicing command completion events.

For this purpose, it adds handle_cmd_completion function which in turn
invokes some other functions depending of handling command type.

Signed-off-by: Pawel Laszczak <pawell@cadence.com>
---
drivers/usb/usbssp/gadget-mem.c | 53 +++-
drivers/usb/usbssp/gadget-ring.c | 510 +++++++++++++++++++++++++++++++
drivers/usb/usbssp/gadget.c | 11 +
drivers/usb/usbssp/gadget.h | 12 +
4 files changed, 584 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/usbssp/gadget-mem.c b/drivers/usb/usbssp/gadget-mem.c
index fef83b6b6cf0..5708a0090ead 100644
--- a/drivers/usb/usbssp/gadget-mem.c
+++ b/drivers/usb/usbssp/gadget-mem.c
@@ -504,6 +504,38 @@ void usbssp_free_container_ctx(struct usbssp_udc *usbssp_data,
kfree(ctx);
}

+struct usbssp_input_control_ctx *usbssp_get_input_control_ctx(
+ struct usbssp_container_ctx *ctx)
+{
+ if (ctx->type != USBSSP_CTX_TYPE_INPUT)
+ return NULL;
+
+ return (struct usbssp_input_control_ctx *)ctx->bytes;
+}
+
+struct usbssp_slot_ctx *usbssp_get_slot_ctx(struct usbssp_udc *usbssp_data,
+ struct usbssp_container_ctx *ctx)
+{
+ if (ctx->type == USBSSP_CTX_TYPE_DEVICE)
+ return (struct usbssp_slot_ctx *)ctx->bytes;
+
+ return (struct usbssp_slot_ctx *) (ctx->bytes +
+ CTX_SIZE(usbssp_data->hcc_params));
+}
+
+struct usbssp_ep_ctx *usbssp_get_ep_ctx(struct usbssp_udc *usbssp_data,
+ struct usbssp_container_ctx *ctx,
+ unsigned int ep_index)
+{
+ /* increment ep index by offset of start of ep ctx array */
+ ep_index++;
+ if (ctx->type == USBSSP_CTX_TYPE_INPUT)
+ ep_index++;
+
+ return (struct usbssp_ep_ctx *) (ctx->bytes +
+ (ep_index * CTX_SIZE(usbssp_data->hcc_params)));
+}
+
/***************** Streams structures manipulation *************************/
static void usbssp_free_stream_ctx(struct usbssp_udc *usbssp_data,
unsigned int num_stream_ctxs,
@@ -523,8 +555,25 @@ static void usbssp_free_stream_ctx(struct usbssp_udc *usbssp_data,
stream_ctx, dma);
}

-/**
- * Frees all stream contexts associated with the endpoint,
+struct usbssp_ring *usbssp_stream_id_to_ring(struct usbssp_device *dev,
+ unsigned int ep_index,
+ unsigned int stream_id)
+{
+ struct usbssp_ep *ep = &dev->eps[ep_index];
+
+ if (stream_id == 0)
+ return ep->ring;
+
+ if (!ep->stream_info)
+ return NULL;
+
+ if (stream_id > ep->stream_info->num_streams)
+ return NULL;
+ return ep->stream_info->stream_rings[stream_id];
+}
+
+/*
+ * Frees all stream contexts associated with the endpoint,
*
* Caller should fix the endpoint context streams fields.
*/
diff --git a/drivers/usb/usbssp/gadget-ring.c b/drivers/usb/usbssp/gadget-ring.c
index 6679d8ec7152..c704b939b48a 100644
--- a/drivers/usb/usbssp/gadget-ring.c
+++ b/drivers/usb/usbssp/gadget-ring.c
@@ -225,6 +225,107 @@ static bool usbssp_mod_cmd_timer(struct usbssp_udc *usbssp_data,
return 0;
}

+void usbssp_ring_ep_doorbell(struct usbssp_udc *usbssp_data,
+ unsigned int ep_index,
+ unsigned int stream_id)
+{
+ __le32 __iomem *db_addr =
+ &usbssp_data->dba->doorbell[usbssp_data->slot_id];
+ struct usbssp_ep *ep = &usbssp_data->devs.eps[ep_index];
+ unsigned int ep_state = ep->ep_state;
+ unsigned int db_value;
+
+ /*
+ * Don't ring the doorbell for this endpoint if there are pending
+ * cancellations because we don't want to interrupt processing.
+ * We don't want to restart any stream rings if there's a set dequeue
+ * pointer command pending because the device can choose to start any
+ * stream once the endpoint is on the HW schedule.
+ * Also we don't want restart any endpoint if endpoint is halted or
+ * disabled and also if endpoint disabling is pending.
+ */
+ if ((ep_state & EP_STOP_CMD_PENDING) ||
+ (ep_state & SET_DEQ_PENDING) ||
+ (ep_state & EP_HALTED) ||
+ !(ep_state & USBSSP_EP_ENABLED) ||
+ (ep_state & USBSSP_EP_DISABLE_PENDING))
+ return;
+
+ if (ep_index == 0 && !usbssp_data->ep0_expect_in &&
+ usbssp_data->ep0state == USBSSP_EP0_DATA_PHASE)
+ db_value = DB_VALUE_EP0_OUT(ep_index, stream_id);
+ else
+ db_value = DB_VALUE(ep_index, stream_id);
+
+ dev_dbg(usbssp_data->dev, "// Ding dong transfer ring for %s!"
+ " - [DB addr/DB val]: [%p/%08x]\n",
+ usbssp_data->devs.eps[ep_index].name, db_addr,
+ db_value);
+
+ writel(db_value, db_addr);
+ /*
+ * The CPU has better things to do at this point than wait for a
+ * write-posting flush. It'll get there soon enough.
+ */
+}
+
+/* Ring the doorbell for any rings with pending USB requests */
+static void ring_doorbell_for_active_rings(struct usbssp_udc *usbssp_data,
+ unsigned int ep_index)
+{
+ unsigned int stream_id;
+ struct usbssp_ep *ep;
+
+ ep = &usbssp_data->devs.eps[ep_index];
+
+ dev_dbg(usbssp_data->dev, "Ring all active ring for %s\n",
+ ep->name);
+
+ /* A ring has pending Request if its TD list is not empty */
+ if (!(ep->ep_state & EP_HAS_STREAMS)) {
+ if (ep->ring && !(list_empty(&ep->ring->td_list)))
+ usbssp_ring_ep_doorbell(usbssp_data, ep_index, 0);
+ return;
+ }
+
+ for (stream_id = 1; stream_id < ep->stream_info->num_streams;
+ stream_id++) {
+ struct usbssp_stream_info *stream_info = ep->stream_info;
+
+ if (!list_empty(&stream_info->stream_rings[stream_id]->td_list))
+ usbssp_ring_ep_doorbell(usbssp_data, ep_index,
+ stream_id);
+ }
+}
+
+/*
+ * When we get a command completion for a Stop Endpoint Command, we need to
+ * stop timer and clear EP_STOP_CMD_PENDING flag.
+ */
+static void usbssp_handle_cmd_stop_ep(struct usbssp_udc *usbssp_data,
+ union usbssp_trb *trb,
+ struct usbssp_event_cmd *event)
+{
+ unsigned int ep_index;
+ struct usbssp_ep *ep;
+ struct usbssp_ep_ctx *ep_ctx;
+ struct usbssp_device *priv_dev;
+
+ ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3]));
+ ep = &usbssp_data->devs.eps[ep_index];
+
+ dev_dbg(usbssp_data->dev,
+ "CMD stop endpoint completion for ep index: %d - %s\n",
+ ep_index, ep->name);
+
+
+ priv_dev = &usbssp_data->devs;
+ ep_ctx = usbssp_get_ep_ctx(usbssp_data, priv_dev->out_ctx, ep_index);
+ trace_usbssp_handle_cmd_stop_ep(ep_ctx);
+
+ ep->ep_state &= ~EP_STOP_CMD_PENDING;
+}
+
static void usbssp_kill_ring_requests(struct usbssp_udc *usbssp_data,
struct usbssp_ring *ring)
{
@@ -300,6 +401,262 @@ void usbssp_udc_died(struct usbssp_udc *usbssp_data)
usbssp_kill_endpoint_request(usbssp_data, i);
}

+static void update_ring_for_set_deq_completion(struct usbssp_udc *usbssp_data,
+ struct usbssp_device *dev,
+ struct usbssp_ring *ep_ring,
+ unsigned int ep_index)
+{
+ union usbssp_trb *dequeue_temp;
+ int num_trbs_free_temp;
+ bool revert = false;
+
+ num_trbs_free_temp = ep_ring->num_trbs_free;
+ dequeue_temp = ep_ring->dequeue;
+
+ if (trb_is_link(ep_ring->dequeue)) {
+ ep_ring->deq_seg = ep_ring->deq_seg->next;
+ ep_ring->dequeue = ep_ring->deq_seg->trbs;
+ }
+
+ while (ep_ring->dequeue != dev->eps[ep_index].queued_deq_ptr) {
+ /* We have more usable TRBs */
+ ep_ring->num_trbs_free++;
+ ep_ring->dequeue++;
+ if (trb_is_link(ep_ring->dequeue)) {
+ if (ep_ring->dequeue ==
+ dev->eps[ep_index].queued_deq_ptr)
+ break;
+ ep_ring->deq_seg = ep_ring->deq_seg->next;
+ ep_ring->dequeue = ep_ring->deq_seg->trbs;
+ }
+ if (ep_ring->dequeue == dequeue_temp) {
+ revert = true;
+ break;
+ }
+ }
+
+ if (revert) {
+ dev_dbg(usbssp_data->dev, "Unable to find new dequeue pointer\n");
+ ep_ring->num_trbs_free = num_trbs_free_temp;
+ }
+}
+
+/*
+ * When we get a completion for a Set Transfer Ring Dequeue Pointer command,
+ * we need to clear the set deq pending flag in the endpoint ring state, so that
+ * the TD queueing code can ring the doorbell again. We also need to ring the
+ * endpoint doorbell to restart the ring
+ */
+static void usbssp_handle_cmd_set_deq(struct usbssp_udc *usbssp_data,
+ union usbssp_trb *trb, u32 cmd_comp_code)
+{
+ unsigned int ep_index;
+ unsigned int stream_id;
+ struct usbssp_ring *ep_ring;
+ struct usbssp_device *dev;
+ struct usbssp_ep *ep;
+ struct usbssp_ep_ctx *ep_ctx;
+ struct usbssp_slot_ctx *slot_ctx;
+
+ ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3]));
+ stream_id = TRB_TO_STREAM_ID(le32_to_cpu(trb->generic.field[2]));
+ dev = &usbssp_data->devs;
+ ep = &dev->eps[ep_index];
+
+ ep_ring = usbssp_stream_id_to_ring(dev, ep_index, stream_id);
+ if (!ep_ring) {
+ dev_warn(usbssp_data->dev,
+ "WARN Set TR deq ptr command for freed stream ID %u\n",
+ stream_id);
+ goto cleanup;
+ }
+
+ ep_ctx = usbssp_get_ep_ctx(usbssp_data, dev->out_ctx, ep_index);
+ slot_ctx = usbssp_get_slot_ctx(usbssp_data, dev->out_ctx);
+ trace_usbssp_handle_cmd_set_deq(slot_ctx);
+ trace_usbssp_handle_cmd_set_deq_ep(ep_ctx);
+
+ if (cmd_comp_code != COMP_SUCCESS) {
+ unsigned int ep_state;
+ unsigned int slot_state;
+
+ switch (cmd_comp_code) {
+ case COMP_TRB_ERROR:
+ dev_warn(usbssp_data->dev,
+ "WARN Set TR Deq Ptr cmd invalid because of "
+ "stream ID configuration\n");
+ break;
+ case COMP_CONTEXT_STATE_ERROR:
+ dev_warn(usbssp_data->dev, "WARN Set TR Deq Ptr cmd "
+ "failed due to incorrect slot or ep state.\n");
+ ep_state = GET_EP_CTX_STATE(ep_ctx);
+ slot_state = le32_to_cpu(slot_ctx->dev_state);
+ slot_state = GET_SLOT_STATE(slot_state);
+ usbssp_dbg_trace(usbssp_data,
+ trace_usbssp_dbg_cancel_request,
+ "Slot state = %u, EP state = %u",
+ slot_state, ep_state);
+ break;
+ case COMP_SLOT_NOT_ENABLED_ERROR:
+ dev_warn(usbssp_data->dev,
+ "WARN Set TR Deq Ptr cmd failed because"
+ " slot %u was not enabled.\n",
+ usbssp_data->slot_id);
+ break;
+ default:
+ dev_warn(usbssp_data->dev, "WARN Set TR Deq Ptr cmd with"
+ " unknown completion code of %u.\n",
+ cmd_comp_code);
+ break;
+ }
+
+ } else {
+ u64 deq;
+ /* deq ptr is written to the stream ctx for streams */
+ if (ep->ep_state & EP_HAS_STREAMS) {
+ struct usbssp_stream_ctx *ctx =
+ &ep->stream_info->stream_ctx_array[stream_id];
+ deq = le64_to_cpu(ctx->stream_ring) & SCTX_DEQ_MASK;
+ } else {
+ deq = le64_to_cpu(ep_ctx->deq) & ~EP_CTX_CYCLE_MASK;
+ }
+ usbssp_dbg_trace(usbssp_data, trace_usbssp_dbg_cancel_request,
+ "Successful Set TR Deq Ptr cmd, deq = @%08llx", deq);
+ if (usbssp_trb_virt_to_dma(ep->queued_deq_seg,
+ ep->queued_deq_ptr) == deq) {
+
+ /*
+ * Update the ring's dequeue segment and dequeue pointer
+ * to reflect the new position.
+ */
+ update_ring_for_set_deq_completion(usbssp_data, dev,
+ ep_ring, ep_index);
+ } else {
+ dev_warn(usbssp_data->dev,
+ "Mismatch between completed Set TR Deq "
+ "Ptr command & DC internal state.\n");
+ dev_warn(usbssp_data->dev,
+ "ep deq seg = %p, deq ptr = %p\n",
+ ep->queued_deq_seg, ep->queued_deq_ptr);
+ }
+ }
+
+cleanup:
+ dev->eps[ep_index].ep_state &= ~SET_DEQ_PENDING;
+ dev->eps[ep_index].queued_deq_seg = NULL;
+ dev->eps[ep_index].queued_deq_ptr = NULL;
+ /* Restart any rings with pending requests */
+ ring_doorbell_for_active_rings(usbssp_data, ep_index);
+}
+
+
+static void usbssp_handle_cmd_reset_ep(struct usbssp_udc *usbssp_data,
+ union usbssp_trb *trb,
+ u32 cmd_comp_code)
+{
+ struct usbssp_ep *dep;
+ struct usbssp_ep_ctx *ep_ctx;
+ unsigned int ep_index;
+
+ ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3]));
+ ep_ctx = usbssp_get_ep_ctx(usbssp_data, usbssp_data->devs.out_ctx,
+ ep_index);
+ trace_usbssp_handle_cmd_reset_ep(ep_ctx);
+
+ /*
+ * This command will only fail if the endpoint wasn't halted,
+ * but we don't care.
+ */
+ usbssp_dbg_trace(usbssp_data, trace_usbssp_dbg_reset_ep,
+ "Ignoring reset ep completion code of %u",
+ cmd_comp_code);
+
+ dep = &usbssp_data->devs.eps[ep_index];
+
+ /* Clear our internal halted state */
+ dep->ep_state &= ~EP_HALTED;
+
+ ring_doorbell_for_active_rings(usbssp_data, ep_index);
+}
+
+static void usbssp_handle_cmd_enable_slot(struct usbssp_udc *usbssp_data,
+ int slot_id,
+ struct usbssp_command *command,
+ u32 cmd_comp_code)
+{
+ if (cmd_comp_code == COMP_SUCCESS) {
+ dev_dbg(usbssp_data->dev,
+ "CMD enable slot complition successfully "
+ "- slto id: %d\n", slot_id);
+ usbssp_data->slot_id = slot_id;
+ } else {
+ dev_dbg(usbssp_data->dev, "CMD enable slot complition failed\n");
+ usbssp_data->slot_id = 0;
+ }
+}
+
+static void usbssp_handle_cmd_disable_slot(struct usbssp_udc *usbssp_data)
+{
+ struct usbssp_device *dev_priv;
+ struct usbssp_slot_ctx *slot_ctx;
+
+ dev_dbg(usbssp_data->dev, "CMD disable slot complition\n");
+
+ dev_priv = &usbssp_data->devs;
+ if (!dev_priv)
+ return;
+
+ usbssp_data->slot_id = 0;
+ slot_ctx = usbssp_get_slot_ctx(usbssp_data, dev_priv->out_ctx);
+ trace_usbssp_handle_cmd_disable_slot(slot_ctx);
+}
+
+static void usbssp_handle_cmd_config_ep(struct usbssp_udc *usbssp_data,
+ struct usbssp_event_cmd *event,
+ u32 cmd_comp_code)
+{
+ struct usbssp_device *priv_dev;
+ struct usbssp_input_control_ctx *ctrl_ctx;
+ struct usbssp_ep_ctx *ep_ctx;
+ unsigned int ep_index;
+ u32 add_flags, drop_flags;
+
+ /*
+ * Configure endpoint commands can come, becaouse device
+ * receive USB_SET_CONFIGURATION or SET_INTERFACE request,
+ * or because the HW needed an extra configure endpoint
+ * command after a reset or disconnect event.
+ */
+ priv_dev = &usbssp_data->devs;
+ ctrl_ctx = usbssp_get_input_control_ctx(priv_dev->in_ctx);
+ if (!ctrl_ctx) {
+ dev_warn(usbssp_data->dev,
+ "Could not get input context, bad type.\n");
+ return;
+ }
+
+ add_flags = le32_to_cpu(ctrl_ctx->add_flags);
+ drop_flags = le32_to_cpu(ctrl_ctx->drop_flags);
+ /* Input ctx add_flags are the endpoint index plus one */
+ ep_index = usbssp_last_valid_endpoint(add_flags) - 1;
+
+ ep_ctx = usbssp_get_ep_ctx(usbssp_data, priv_dev->out_ctx, ep_index);
+ trace_usbssp_handle_cmd_config_ep(ep_ctx);
+}
+
+static void usbssp_handle_cmd_reset_dev(struct usbssp_udc *usbssp_data,
+ struct usbssp_event_cmd *event)
+{
+ struct usbssp_device *dev_priv;
+ struct usbssp_slot_ctx *slot_ctx;
+
+ dev_priv = &usbssp_data->devs;
+ slot_ctx = usbssp_get_slot_ctx(usbssp_data, dev_priv->out_ctx);
+ trace_usbssp_handle_cmd_reset_dev(slot_ctx);
+ dev_dbg(usbssp_data->dev, "Completed reset device command.\n");
+ if (!usbssp_data->devs.gadget)
+ dev_warn(usbssp_data->dev, "Reset device command completion\n");
+}

void usbssp_handle_command_timeout(struct work_struct *work)
{
@@ -327,6 +684,156 @@ void usbssp_cleanup_command_queue(struct usbssp_udc *usbssp_data)
usbssp_complete_del_and_free_cmd(cur_cmd, COMP_COMMAND_ABORTED);
}

+static void handle_cmd_completion(struct usbssp_udc *usbssp_data,
+ struct usbssp_event_cmd *event)
+{
+ int slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags));
+ u64 cmd_dma;
+ dma_addr_t cmd_dequeue_dma;
+ u32 cmd_comp_code;
+ union usbssp_trb *cmd_trb;
+ struct usbssp_command *cmd;
+ u32 cmd_type;
+
+ cmd_dma = le64_to_cpu(event->cmd_trb);
+ cmd_trb = usbssp_data->cmd_ring->dequeue;
+
+ trace_usbssp_handle_command(usbssp_data->cmd_ring, &cmd_trb->generic);
+
+ cmd_dequeue_dma = usbssp_trb_virt_to_dma(usbssp_data->cmd_ring->deq_seg,
+ cmd_trb);
+
+ /*
+ * Check whether the completion event is for our internal kept
+ * command.
+ */
+ if (!cmd_dequeue_dma || cmd_dma != (u64)cmd_dequeue_dma) {
+ dev_warn(usbssp_data->dev,
+ "ERROR mismatched command completion event\n");
+ return;
+ }
+
+ cmd = list_entry(usbssp_data->cmd_list.next, struct usbssp_command,
+ cmd_list);
+
+ cancel_delayed_work(&usbssp_data->cmd_timer);
+
+ cmd_comp_code = GET_COMP_CODE(le32_to_cpu(event->status));
+
+ /* If CMD ring stopped we own the trbs between enqueue and dequeue */
+ if (cmd_comp_code == COMP_COMMAND_RING_STOPPED) {
+ complete_all(&usbssp_data->cmd_ring_stop_completion);
+ return;
+ }
+
+ if (cmd->command_trb != usbssp_data->cmd_ring->dequeue) {
+ dev_err(usbssp_data->dev,
+ "Command completion event does not match command\n");
+ return;
+ }
+
+ /*
+ * device aborted the command ring, check if the current command was
+ * supposed to be aborted, otherwise continue normally.
+ * The command ring is stopped now, but the DC will issue a Command
+ * Ring Stopped event which will cause us to restart it.
+ */
+ if (cmd_comp_code == COMP_COMMAND_ABORTED) {
+ usbssp_data->cmd_ring_state = CMD_RING_STATE_STOPPED;
+
+ if (cmd->status == COMP_COMMAND_ABORTED) {
+ if (usbssp_data->current_cmd == cmd)
+ usbssp_data->current_cmd = NULL;
+ goto event_handled;
+ }
+ }
+
+ cmd_type = TRB_FIELD_TO_TYPE(le32_to_cpu(cmd_trb->generic.field[3]));
+ switch (cmd_type) {
+ case TRB_ENABLE_SLOT:
+ usbssp_handle_cmd_enable_slot(usbssp_data, slot_id,
+ cmd, cmd_comp_code);
+ break;
+ case TRB_DISABLE_SLOT:
+ usbssp_handle_cmd_disable_slot(usbssp_data);
+ break;
+ case TRB_CONFIG_EP:
+ if (!cmd->completion)
+ usbssp_handle_cmd_config_ep(usbssp_data, event,
+ cmd_comp_code);
+ break;
+ case TRB_EVAL_CONTEXT:
+ break;
+ case TRB_ADDR_DEV: {
+ struct usbssp_slot_ctx *slot_ctx;
+
+ slot_ctx = usbssp_get_slot_ctx(usbssp_data,
+ usbssp_data->devs.out_ctx);
+ trace_usbssp_handle_cmd_addr_dev(slot_ctx);
+ break;
+ }
+ case TRB_STOP_RING:
+ WARN_ON(slot_id != TRB_TO_SLOT_ID(
+ le32_to_cpu(cmd_trb->generic.field[3])));
+ usbssp_handle_cmd_stop_ep(usbssp_data, cmd_trb, event);
+ break;
+ case TRB_SET_DEQ:
+ WARN_ON(slot_id != TRB_TO_SLOT_ID(
+ le32_to_cpu(cmd_trb->generic.field[3])));
+ usbssp_handle_cmd_set_deq(usbssp_data, cmd_trb, cmd_comp_code);
+ break;
+ case TRB_CMD_NOOP:
+ /* Is this an aborted command turned to NO-OP? */
+ if (cmd->status == COMP_COMMAND_RING_STOPPED)
+ cmd_comp_code = COMP_COMMAND_RING_STOPPED;
+ break;
+ case TRB_HALT_ENDPOINT:
+ if (cmd->status == COMP_COMMAND_RING_STOPPED)
+ cmd_comp_code = COMP_COMMAND_RING_STOPPED;
+ break;
+ case TRB_FLUSH_ENDPOINT:
+ if (cmd->status == COMP_COMMAND_RING_STOPPED)
+ cmd_comp_code = COMP_COMMAND_RING_STOPPED;
+ break;
+ case TRB_RESET_EP:
+ WARN_ON(slot_id != TRB_TO_SLOT_ID(
+ le32_to_cpu(cmd_trb->generic.field[3])));
+ usbssp_handle_cmd_reset_ep(usbssp_data, cmd_trb, cmd_comp_code);
+ break;
+ case TRB_RESET_DEV:
+ /*
+ * SLOT_ID field in reset device cmd completion event TRB is 0.
+ * Use the SLOT_ID from the command TRB instead.
+ */
+ slot_id = TRB_TO_SLOT_ID(
+ le32_to_cpu(cmd_trb->generic.field[3]));
+
+ WARN_ON(slot_id != 0);
+ usbssp_handle_cmd_reset_dev(usbssp_data, event);
+ break;
+ case TRB_FORCE_HEADER:
+ break;
+ default:
+ /* Skip over unknown commands on the event ring */
+ dev_info(usbssp_data->dev, "INFO unknown command type %d\n",
+ cmd_type);
+ break;
+ }
+
+ /* restart timer if this wasn't the last command */
+ if (!list_is_singular(&usbssp_data->cmd_list)) {
+ usbssp_data->current_cmd = list_first_entry(&cmd->cmd_list,
+ struct usbssp_command, cmd_list);
+ usbssp_mod_cmd_timer(usbssp_data, USBSSP_CMD_DEFAULT_TIMEOUT);
+ } else if (usbssp_data->current_cmd == cmd) {
+ usbssp_data->current_cmd = NULL;
+ }
+
+event_handled:
+ usbssp_complete_del_and_free_cmd(cmd, cmd_comp_code);
+ inc_deq(usbssp_data, usbssp_data->cmd_ring);
+}
+
static void handle_port_status(struct usbssp_udc *usbssp_data,
union usbssp_trb *event)
{
@@ -596,6 +1103,9 @@ int usbssp_handle_event(struct usbssp_udc *usbssp_data)
rmb();

switch ((le32_to_cpu(event->event_cmd.flags) & TRB_TYPE_BITMASK)) {
+ case TRB_TYPE(TRB_COMPLETION):
+ handle_cmd_completion(usbssp_data, &event->event_cmd);
+ break;
case TRB_TYPE(TRB_PORT_STATUS):
handle_port_status(usbssp_data, event);
update_ptrs = 0;
diff --git a/drivers/usb/usbssp/gadget.c b/drivers/usb/usbssp/gadget.c
index 2996b1d3baf7..6b3dc973c0d9 100644
--- a/drivers/usb/usbssp/gadget.c
+++ b/drivers/usb/usbssp/gadget.c
@@ -262,6 +262,17 @@ int usbssp_resume(struct usbssp_udc *usbssp_data, bool hibernated)

#endif /* CONFIG_PM */

+/* Compute the last valid endpoint context index. Basically, this is the
+ * endpoint index plus one. For slot contexts with more than valid endpoint,
+ * we find the most significant bit set in the added contexts flags.
+ * e.g. ep 1 IN (with epnum 0x81) => added_ctxs = 0b1000
+ * fls(0b1000) = 4, but the endpoint context index is 3, so subtract one.
+ */
+unsigned int usbssp_last_valid_endpoint(u32 added_ctxs)
+{
+ return fls(added_ctxs) - 1;
+}
+
int usbssp_gen_setup(struct usbssp_udc *usbssp_data)
{
int retval;
diff --git a/drivers/usb/usbssp/gadget.h b/drivers/usb/usbssp/gadget.h
index 33eccffc885d..145371eee47d 100644
--- a/drivers/usb/usbssp/gadget.h
+++ b/drivers/usb/usbssp/gadget.h
@@ -1685,9 +1685,13 @@ void usbssp_dbg_trace(struct usbssp_udc *usbssp_data,
/* USBSSP memory management */
void usbssp_mem_cleanup(struct usbssp_udc *usbssp_data);
int usbssp_mem_init(struct usbssp_udc *usbssp_data, gfp_t flags);
+unsigned int usbssp_last_valid_endpoint(u32 added_ctxs);
int usbssp_ring_expansion(struct usbssp_udc *usbssp_data,
struct usbssp_ring *ring,
unsigned int num_trbs, gfp_t flags);
+struct usbssp_ring *usbssp_stream_id_to_ring(struct usbssp_device *dev,
+ unsigned int ep_index,
+ unsigned int stream_id);

struct usbssp_command *usbssp_alloc_command(struct usbssp_udc *usbssp_data,
bool allocate_completion,
@@ -1732,6 +1736,14 @@ void usbssp_set_link_state(struct usbssp_udc *usbssp_data,
void usbssp_test_and_clear_bit(struct usbssp_udc *usbssp_data,
__le32 __iomem *port_regs, u32 port_bit);

+/* USBSSP DC contexts */
+struct usbssp_input_control_ctx *usbssp_get_input_control_ctx(
+ struct usbssp_container_ctx *ctx);
+struct usbssp_slot_ctx *usbssp_get_slot_ctx(struct usbssp_udc *usbssp_data,
+ struct usbssp_container_ctx *ctx);
+struct usbssp_ep_ctx *usbssp_get_ep_ctx(struct usbssp_udc *usbssp_data,
+ struct usbssp_container_ctx *ctx,
+ unsigned int ep_index);
/* USBSSP gadget interface*/
void usbssp_suspend_gadget(struct usbssp_udc *usbssp_data);
void usbssp_resume_gadget(struct usbssp_udc *usbssp_data);
--
2.17.1
\
 
 \ /
  Last update: 2018-07-19 20:03    [W:0.310 / U:8.596 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site