#include <linux/usb.h>
#include <linux/kfifo.h>
#include <linux/debugfs.h>
+#include <linux/list.h>
#include <asm/unaligned.h>
#include "greybus.h"
+#include "greybus_trace.h"
#include "kernel_ver.h"
#include "connection.h"
-#include "greybus_trace.h"
-
/* Fixed CPort numbers */
#define ES2_CPORT_CDSI0 16
/* Memory sizes for the buffers sent to/from the ES2 controller */
#define ES2_GBUF_MSG_SIZE_MAX 2048
+/* Memory sizes for the ARPC buffers */
+#define ARPC_OUT_SIZE_MAX U16_MAX
+#define ARPC_IN_SIZE_MAX 128
+
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x18d1, 0x1eaf) },
{ },
/* Number of bulk in and bulk out couple */
#define NUM_BULKS 7
+/* Expected number of bulk out endpoints */
+#define NUM_BULKS_OUT NUM_BULKS
+
+/* Expected number of bulk in endpoints (including ARPC endpoint) */
+#define NUM_BULKS_IN (NUM_BULKS + 1)
+
/*
* Number of CPort IN urbs in flight at any point in time.
* Adjust if we are having stalls in the USB buffer due to not enough urbs in
*/
#define NUM_CPORT_OUT_URB (8 * NUM_BULKS)
+/*
+ * Number of ARPC in urbs in flight at any point in time.
+ */
+#define NUM_ARPC_IN_URB 2
+
/*
* @endpoint: bulk in endpoint for CPort data
* @urb: array of urbs for the CPort in messages
* @apb_log_dentry: file system entry for the log file interface
* @apb_log_enable_dentry: file system entry for enabling logging
* @apb_log_fifo: kernel FIFO to carry logged data
+ * @arpc_urb: array of urbs for the ARPC in messages
+ * @arpc_buffer: array of buffers for the @arpc_urb urbs
+ * @arpc_endpoint_in: bulk in endpoint for APBridgeA RPC
+ * @arpc_id_cycle: gives an unique id to ARPC
+ * @arpc_lock: locks ARPC list
+ * @arpcs: list of in progress ARPCs
*/
struct es2_ap_dev {
struct usb_device *usb_dev;
struct dentry *apb_log_dentry;
struct dentry *apb_log_enable_dentry;
DECLARE_KFIFO(apb_log_fifo, char, APB1_LOG_SIZE);
+
+ __u8 arpc_endpoint_in;
+ struct urb *arpc_urb[NUM_ARPC_IN_URB];
+ u8 *arpc_buffer[NUM_ARPC_IN_URB];
+
+ int arpc_id_cycle;
+ spinlock_t arpc_lock;
+ struct list_head arpcs;
};
/**
__le64 frame_time[GB_TIMESYNC_MAX_STROBES];
} __packed;
+struct arpc {
+ struct list_head list;
+ struct arpc_request_message *req;
+ struct arpc_response_message *resp;
+ struct completion response_received;
+ bool active;
+};
+
static inline struct es2_ap_dev *hd_to_es2(struct gb_host_device *hd)
{
return (struct es2_ap_dev *)&hd->hd_priv;
static void cport_out_callback(struct urb *urb);
static void usb_log_enable(struct es2_ap_dev *es2);
static void usb_log_disable(struct es2_ap_dev *es2);
+static int arpc_sync(struct es2_ap_dev *es2, u8 type, void *payload,
+ size_t size, int *result, unsigned int timeout);
/* Get the endpoints pair mapped to the cport */
static int cport_to_ep_pair(struct es2_ap_dev *es2, u16 cport_id)
}
}
+static int es2_arpc_in_enable(struct es2_ap_dev *es2)
+{
+ struct urb *urb;
+ int ret;
+ int i;
+
+ for (i = 0; i < NUM_ARPC_IN_URB; ++i) {
+ urb = es2->arpc_urb[i];
+
+ ret = usb_submit_urb(urb, GFP_KERNEL);
+ if (ret) {
+ dev_err(&es2->usb_dev->dev,
+ "failed to submit arpc in-urb: %d\n", ret);
+ goto err_kill_urbs;
+ }
+ }
+
+ return 0;
+
+err_kill_urbs:
+ for (--i; i >= 0; --i) {
+ urb = es2->arpc_urb[i];
+ usb_kill_urb(urb);
+ }
+
+ return ret;
+}
+
+static void es2_arpc_in_disable(struct es2_ap_dev *es2)
+{
+ struct urb *urb;
+ int i;
+
+ for (i = 0; i < NUM_ARPC_IN_URB; ++i) {
+ urb = es2->arpc_urb[i];
+ usb_kill_urb(urb);
+ }
+}
+
static struct urb *next_free_urb(struct es2_ap_dev *es2, gfp_t gfp_mask)
{
struct urb *urb = NULL;
message->buffer, buffer_size,
cport_out_callback, message);
urb->transfer_flags |= URB_ZERO_PACKET;
- trace_gb_host_device_send(hd, cport_id, buffer_size);
+
+ trace_gb_message_submit(message);
+
retval = usb_submit_urb(urb, gfp_mask);
if (retval) {
dev_err(&udev->dev, "failed to submit out-urb: %d\n", retval);
{
struct es2_ap_dev *es2 = hd_to_es2(hd);
struct usb_device *udev = es2->usb_dev;
+ struct arpc_cport_reset_req req;
int retval;
+ int result;
switch (cport_id) {
case GB_SVC_CPORT_ID:
return 0;
}
- retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
- GB_APB_REQUEST_RESET_CPORT,
- USB_DIR_OUT | USB_TYPE_VENDOR |
- USB_RECIP_INTERFACE, cport_id, 0,
- NULL, 0, ES2_TIMEOUT);
- if (retval < 0) {
+ req.cport_id = cpu_to_le16(cport_id);
+ retval = arpc_sync(es2, ARPC_TYPE_CPORT_RESET, &req, sizeof(req),
+ &result, ES2_TIMEOUT);
+ if (retval == -EREMOTEIO) {
dev_err(&udev->dev, "failed to reset cport %u: %d\n", cport_id,
- retval);
- return retval;
+ result);
}
- return 0;
+ return retval;
}
static int es2_cport_allocate(struct gb_host_device *hd, int cport_id,
ida_simple_remove(&hd->cport_id_map, cport_id);
}
-static int cport_enable(struct gb_host_device *hd, u16 cport_id)
+static int cport_enable(struct gb_host_device *hd, u16 cport_id,
+ unsigned long flags)
+{
+ struct es2_ap_dev *es2 = hd_to_es2(hd);
+ struct usb_device *udev = es2->usb_dev;
+ struct gb_apb_request_cport_flags *req;
+ u32 connection_flags;
+ int ret;
+
+ req = kzalloc(sizeof(*req), GFP_KERNEL);
+ if (!req)
+ return -ENOMEM;
+
+ connection_flags = 0;
+ if (flags & GB_CONNECTION_FLAG_CONTROL)
+ connection_flags |= GB_APB_CPORT_FLAG_CONTROL;
+ if (flags & GB_CONNECTION_FLAG_HIGH_PRIO)
+ connection_flags |= GB_APB_CPORT_FLAG_HIGH_PRIO;
+
+ req->flags = cpu_to_le32(connection_flags);
+
+ dev_dbg(&hd->dev, "%s - cport = %u, flags = %02x\n", __func__,
+ cport_id, connection_flags);
+
+ ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ GB_APB_REQUEST_CPORT_FLAGS,
+ USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_INTERFACE, cport_id, 0,
+ req, sizeof(*req), ES2_TIMEOUT);
+ if (ret != sizeof(*req)) {
+ dev_err(&udev->dev, "failed to set cport flags for port %d\n",
+ cport_id);
+ if (ret >= 0)
+ ret = -EIO;
+
+ goto out;
+ }
+
+ ret = 0;
+out:
+ kfree(req);
+
+ return ret;
+}
+
+static int cport_disable(struct gb_host_device *hd, u16 cport_id)
{
int retval;
struct es2_ap_dev *es2 = hd_to_es2(hd);
struct usb_device *udev = es2->usb_dev;
- if (!cport_id_valid(hd, cport_id)) {
- dev_err(&udev->dev, "invalid cport %u\n", cport_id);
- return -EINVAL;
- }
-
retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
GB_APB_REQUEST_LATENCY_TAG_EN,
USB_DIR_OUT | USB_TYPE_VENDOR |
struct es2_ap_dev *es2 = hd_to_es2(hd);
struct usb_device *udev = es2->usb_dev;
- if (!cport_id_valid(hd, cport_id)) {
- dev_err(&udev->dev, "invalid cport %u\n", cport_id);
- return -EINVAL;
- }
-
retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
GB_APB_REQUEST_LATENCY_TAG_DIS,
USB_DIR_OUT | USB_TYPE_VENDOR |
int retval;
struct es2_ap_dev *es2 = hd_to_es2(hd);
struct usb_device *udev = es2->usb_dev;
- u64 *response_frame_time;
+ __le64 *response_frame_time;
response_frame_time = kzalloc(sizeof(*response_frame_time), GFP_KERNEL);
if (!response_frame_time)
.cport_allocate = es2_cport_allocate,
.cport_release = es2_cport_release,
.cport_enable = cport_enable,
+ .cport_disable = cport_disable,
.latency_tag_enable = latency_tag_enable,
.latency_tag_disable = latency_tag_disable,
.output = output,
es2->cport_out_urb_busy[i] = false; /* just to be anal */
}
+ for (i = 0; i < NUM_ARPC_IN_URB; ++i) {
+ struct urb *urb = es2->arpc_urb[i];
+
+ if (!urb)
+ break;
+ usb_free_urb(urb);
+ kfree(es2->arpc_buffer[i]);
+ es2->arpc_buffer[i] = NULL;
+ }
+
for (bulk_in = 0; bulk_in < NUM_BULKS; bulk_in++) {
struct es2_cport_in *cport_in = &es2->cport_in[bulk_in];
kfree(es2->cport_to_ep);
+ /* release reserved CDSI0 and CDSI1 cports */
+ gb_hd_cport_release_reserved(es2->hd, ES2_CPORT_CDSI1);
+ gb_hd_cport_release_reserved(es2->hd, ES2_CPORT_CDSI0);
+
udev = es2->usb_dev;
gb_hd_put(es2->hd);
cport_id = gb_message_cport_unpack(header);
if (cport_id_valid(hd, cport_id)) {
- trace_gb_host_device_recv(hd, cport_id, urb->actual_length);
greybus_data_rcvd(hd, cport_id, urb->transfer_buffer,
urb->actual_length);
} else {
free_urb(es2, urb);
}
+static struct arpc *arpc_alloc(void *payload, u16 size, u8 type)
+{
+ struct arpc *rpc;
+
+ if (size + sizeof(*rpc->req) > ARPC_OUT_SIZE_MAX)
+ return NULL;
+
+ rpc = kzalloc(sizeof(*rpc), GFP_KERNEL);
+ if (!rpc)
+ return NULL;
+
+ INIT_LIST_HEAD(&rpc->list);
+ rpc->req = kzalloc(sizeof(*rpc->req) + size, GFP_KERNEL);
+ if (!rpc->req)
+ goto err_free_rpc;
+
+ rpc->resp = kzalloc(sizeof(*rpc->resp), GFP_KERNEL);
+ if (!rpc->resp)
+ goto err_free_req;
+
+ rpc->req->type = type;
+ rpc->req->size = cpu_to_le16(sizeof(rpc->req) + size);
+ memcpy(rpc->req->data, payload, size);
+
+ init_completion(&rpc->response_received);
+
+ return rpc;
+
+err_free_req:
+ kfree(rpc->req);
+err_free_rpc:
+ kfree(rpc);
+
+ return NULL;
+}
+
+static void arpc_free(struct arpc *rpc)
+{
+ kfree(rpc->req);
+ kfree(rpc->resp);
+ kfree(rpc);
+}
+
+static struct arpc *arpc_find(struct es2_ap_dev *es2, __le16 id)
+{
+ struct arpc *rpc;
+
+ list_for_each_entry(rpc, &es2->arpcs, list) {
+ if (rpc->req->id == id)
+ return rpc;
+ }
+
+ return NULL;
+}
+
+static void arpc_add(struct es2_ap_dev *es2, struct arpc *rpc)
+{
+ rpc->active = true;
+ rpc->req->id = cpu_to_le16(es2->arpc_id_cycle++);
+ list_add_tail(&rpc->list, &es2->arpcs);
+}
+
+static void arpc_del(struct es2_ap_dev *es2, struct arpc *rpc)
+{
+ if (rpc->active) {
+ rpc->active = false;
+ list_del(&rpc->list);
+ }
+}
+
+static int arpc_send(struct es2_ap_dev *es2, struct arpc *rpc, int timeout)
+{
+ struct usb_device *udev = es2->usb_dev;
+ int retval;
+
+ retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ APBA_REQUEST_ARPC_RUN,
+ USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_INTERFACE,
+ 0, 0,
+ rpc->req, le16_to_cpu(rpc->req->size),
+ ES2_TIMEOUT);
+ if (retval != le16_to_cpu(rpc->req->size)) {
+ dev_err(&udev->dev,
+ "failed to send ARPC request %d: %d\n",
+ rpc->req->type, retval);
+ if (retval > 0)
+ retval = -EIO;
+ return retval;
+ }
+
+ return 0;
+}
+
+static int arpc_sync(struct es2_ap_dev *es2, u8 type, void *payload,
+ size_t size, int *result, unsigned int timeout)
+{
+ struct arpc *rpc;
+ unsigned long flags;
+ int retval;
+
+ *result = 0;
+
+ rpc = arpc_alloc(payload, size, type);
+ if (!rpc)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&es2->arpc_lock, flags);
+ arpc_add(es2, rpc);
+ spin_unlock_irqrestore(&es2->arpc_lock, flags);
+
+ retval = arpc_send(es2, rpc, timeout);
+ if (retval)
+ goto out_arpc_del;
+
+ retval = wait_for_completion_interruptible_timeout(
+ &rpc->response_received,
+ msecs_to_jiffies(timeout));
+ if (retval <= 0) {
+ if (!retval)
+ retval = -ETIMEDOUT;
+ goto out_arpc_del;
+ }
+
+ if (rpc->resp->result) {
+ retval = -EREMOTEIO;
+ *result = rpc->resp->result;
+ } else {
+ retval = 0;
+ }
+
+out_arpc_del:
+ spin_lock_irqsave(&es2->arpc_lock, flags);
+ arpc_del(es2, rpc);
+ spin_unlock_irqrestore(&es2->arpc_lock, flags);
+ arpc_free(rpc);
+
+ if (retval < 0 && retval != -EREMOTEIO) {
+ dev_err(&es2->usb_dev->dev,
+ "failed to execute ARPC: %d\n", retval);
+ }
+
+ return retval;
+}
+
+static void arpc_in_callback(struct urb *urb)
+{
+ struct es2_ap_dev *es2 = urb->context;
+ struct device *dev = &urb->dev->dev;
+ int status = check_urb_status(urb);
+ struct arpc *rpc;
+ struct arpc_response_message *resp;
+ unsigned long flags;
+ int retval;
+
+ if (status) {
+ if ((status == -EAGAIN) || (status == -EPROTO))
+ goto exit;
+
+ /* The urb is being unlinked */
+ if (status == -ENOENT || status == -ESHUTDOWN)
+ return;
+
+ dev_err(dev, "arpc in-urb error %d (dropped)\n", status);
+ return;
+ }
+
+ if (urb->actual_length < sizeof(*resp)) {
+ dev_err(dev, "short aprc response received\n");
+ goto exit;
+ }
+
+ resp = urb->transfer_buffer;
+ spin_lock_irqsave(&es2->arpc_lock, flags);
+ rpc = arpc_find(es2, resp->id);
+ if (!rpc) {
+ dev_err(dev, "invalid arpc response id received: %u\n",
+ le16_to_cpu(resp->id));
+ spin_unlock_irqrestore(&es2->arpc_lock, flags);
+ goto exit;
+ }
+
+ arpc_del(es2, rpc);
+ memcpy(rpc->resp, resp, sizeof(*resp));
+ complete(&rpc->response_received);
+ spin_unlock_irqrestore(&es2->arpc_lock, flags);
+
+exit:
+ /* put our urb back in the request pool */
+ retval = usb_submit_urb(urb, GFP_ATOMIC);
+ if (retval)
+ dev_err(dev, "failed to resubmit arpc in-urb: %d\n", retval);
+}
+
#define APB1_LOG_MSG_SIZE 64
static void apb_log_get(struct es2_ap_dev *es2, char *buf)
{
endpoint = &iface_desc->endpoint[i].desc;
if (usb_endpoint_is_bulk_in(endpoint)) {
- es2->cport_in[bulk_in++].endpoint =
- endpoint->bEndpointAddress;
+ if (bulk_in < NUM_BULKS)
+ es2->cport_in[bulk_in].endpoint =
+ endpoint->bEndpointAddress;
+ else
+ es2->arpc_endpoint_in =
+ endpoint->bEndpointAddress;
+ bulk_in++;
} else if (usb_endpoint_is_bulk_out(endpoint)) {
es2->cport_out[bulk_out++].endpoint =
endpoint->bEndpointAddress;
endpoint->bEndpointAddress);
}
}
- if (bulk_in != NUM_BULKS || bulk_out != NUM_BULKS) {
+ if (bulk_in != NUM_BULKS_IN || bulk_out != NUM_BULKS_OUT) {
dev_err(&udev->dev, "Not enough endpoints found in device, aborting!\n");
retval = -ENODEV;
goto error;
}
}
+ /* Allocate buffers for ARPC in messages */
+ for (i = 0; i < NUM_ARPC_IN_URB; ++i) {
+ struct urb *urb;
+ u8 *buffer;
+
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb) {
+ retval = -ENOMEM;
+ goto error;
+ }
+ buffer = kmalloc(ARPC_IN_SIZE_MAX, GFP_KERNEL);
+ if (!buffer) {
+ retval = -ENOMEM;
+ goto error;
+ }
+
+ usb_fill_bulk_urb(urb, udev,
+ usb_rcvbulkpipe(udev,
+ es2->arpc_endpoint_in),
+ buffer, ARPC_IN_SIZE_MAX,
+ arpc_in_callback, es2);
+
+ es2->arpc_urb[i] = urb;
+ es2->arpc_buffer[i] = buffer;
+ }
+
/* Allocate urbs for our CPort OUT messages */
for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
struct urb *urb;
gb_debugfs_get(), es2,
&apb_log_enable_fops);
+ INIT_LIST_HEAD(&es2->arpcs);
+ spin_lock_init(&es2->arpc_lock);
+
+ if (es2_arpc_in_enable(es2))
+ goto error;
+
retval = gb_hd_add(hd);
if (retval)
- goto error;
+ goto err_disable_arpc_in;
for (i = 0; i < NUM_BULKS; ++i) {
retval = es2_cport_in_enable(es2, &es2->cport_in[i]);
for (--i; i >= 0; --i)
es2_cport_in_disable(es2, &es2->cport_in[i]);
gb_hd_del(hd);
+err_disable_arpc_in:
+ es2_arpc_in_disable(es2);
error:
es2_destroy(es2);
for (i = 0; i < NUM_BULKS; ++i)
es2_cport_in_disable(es2, &es2->cport_in[i]);
+ es2_arpc_in_disable(es2);
es2_destroy(es2);
}
projects / cascardo / linux.git / blobdiff