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greybus: add num_cports field to greybus hd 

This commit is doing the preparation work in order to get the number of cports
supported from the UniPro IP instead of using a constant defined in a Kconfig
file.

Greybus host device is now holding the cport count, and all the code will now
use this value instead of the constant CPORT_ID_MAX when referring to an AP's
CPort ID.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
[johan: es1 supports 256 cports, minor style changes ]
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
This commit is contained in:
Fabien Parent 2015-09-02 15:50:35 +02:00 committed by Johan Hovold
parent e074a2e287
commit 144670c2ae
6 changed files with 31 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/staging/greybus/connection.c
View File

@ -311,7 +311,7 @@ struct gb_connection *gb_connection_create(struct gb_bundle *bundle,
{
return gb_connection_create_range(bundle->intf->hd, bundle,
&bundle->dev, cport_id, protocol_id,
0, CPORT_ID_MAX);
0, bundle->intf->hd->num_cports - 1);
}
/*

9
drivers/staging/greybus/core.c
View File

@ -168,7 +168,8 @@ static void free_hd(struct kref *kref)
struct greybus_host_device *greybus_create_hd(struct greybus_host_driver *driver,
struct device *parent,
size_t buffer_size_max)
size_t buffer_size_max,
size_t num_cports)
{
struct greybus_host_device *hd;
@ -186,6 +187,11 @@ struct greybus_host_device *greybus_create_hd(struct greybus_host_driver *driver
return NULL;
}
if (num_cports == 0 || num_cports > CPORT_ID_MAX) {
dev_err(parent, "Invalid number of CPorts: %zu\n", num_cports);
return ERR_PTR(-EINVAL);
}
/*
* Make sure to never allocate messages larger than what the Greybus
* protocol supports.
@ -207,6 +213,7 @@ struct greybus_host_device *greybus_create_hd(struct greybus_host_driver *driver
INIT_LIST_HEAD(&hd->connections);
ida_init(&hd->cport_id_map);
hd->buffer_size_max = buffer_size_max;
hd->num_cports = num_cports;
/*
* Initialize AP's SVC protocol connection:

10
drivers/staging/greybus/es1.c
View File

@ -33,6 +33,9 @@ static struct dentry *apb1_log_enable_dentry;
static struct task_struct *apb1_log_task;
static DEFINE_KFIFO(apb1_log_fifo, char, APB1_LOG_SIZE);
/* Number of CPorts supported by es1 */
#define CPORT_COUNT 256
/*
* 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
@ -193,7 +196,7 @@ static int message_send(struct greybus_host_device *hd, u16 cport_id,
* of where the data should be sent. Do one last check of
* the target CPort id before filling it in.
*/
if (!cport_id_valid(cport_id)) {
if (!cport_id_valid(hd, cport_id)) {
pr_err("invalid destination cport 0x%02x\n", cport_id);
return -EINVAL;
}
@ -372,7 +375,7 @@ static void cport_in_callback(struct urb *urb)
header = urb->transfer_buffer;
cport_id = gb_message_cport_unpack(header);
if (cport_id_valid(cport_id))
if (cport_id_valid(hd, cport_id))
greybus_data_rcvd(hd, cport_id, urb->transfer_buffer,
urb->actual_length);
else
@ -560,7 +563,8 @@ static int ap_probe(struct usb_interface *interface,
udev = usb_get_dev(interface_to_usbdev(interface));
hd = greybus_create_hd(&es1_driver, &udev->dev, ES1_GBUF_MSG_SIZE_MAX);
hd = greybus_create_hd(&es1_driver, &udev->dev, ES1_GBUF_MSG_SIZE_MAX,
CPORT_COUNT);
if (IS_ERR(hd)) {
usb_put_dev(udev);
return PTR_ERR(hd);

13
drivers/staging/greybus/es2.c
View File

@ -128,7 +128,7 @@ static void usb_log_disable(struct es1_ap_dev *es1);
static int cport_to_ep(struct es1_ap_dev *es1, u16 cport_id)
{
if (cport_id >= CPORT_COUNT)
if (cport_id >= es1->hd->num_cports)
return 0;
return es1->cport_to_ep[cport_id];
}
@ -139,7 +139,7 @@ static int ep_in_use(struct es1_ap_dev *es1, int bulk_ep_set)
{
int i;
for (i = 0; i < CPORT_COUNT; i++) {
for (i = 0; i < es1->hd->num_cports; i++) {
if (es1->cport_to_ep[i] == bulk_ep_set)
return 1;
}
@ -154,7 +154,7 @@ int map_cport_to_ep(struct es1_ap_dev *es1,
if (bulk_ep_set == 0 || bulk_ep_set >= NUM_BULKS)
return -EINVAL;
if (cport_id >= CPORT_COUNT)
if (cport_id >= es1->hd->num_cports)
return -EINVAL;
if (bulk_ep_set && ep_in_use(es1, bulk_ep_set))
return -EINVAL;
@ -287,7 +287,7 @@ static int message_send(struct greybus_host_device *hd, u16 cport_id,
* of where the data should be sent. Do one last check of
* the target CPort id before filling it in.
*/
if (!cport_id_valid(cport_id)) {
if (!cport_id_valid(hd, cport_id)) {
pr_err("invalid destination cport 0x%02x\n", cport_id);
return -EINVAL;
}
@ -472,7 +472,7 @@ static void cport_in_callback(struct urb *urb)
header = urb->transfer_buffer;
cport_id = gb_message_cport_unpack(header);
if (cport_id_valid(cport_id))
if (cport_id_valid(hd, cport_id))
greybus_data_rcvd(hd, cport_id, urb->transfer_buffer,
urb->actual_length);
else
@ -660,7 +660,8 @@ static int ap_probe(struct usb_interface *interface,
udev = usb_get_dev(interface_to_usbdev(interface));
hd = greybus_create_hd(&es1_driver, &udev->dev, ES1_GBUF_MSG_SIZE_MAX);
hd = greybus_create_hd(&es1_driver, &udev->dev, ES1_GBUF_MSG_SIZE_MAX,
CPORT_COUNT);
if (IS_ERR(hd)) {
usb_put_dev(udev);
return PTR_ERR(hd);

10
drivers/staging/greybus/greybus.h
View File

@ -96,6 +96,9 @@ struct greybus_host_device {
struct ida cport_id_map;
u8 device_id;
/* Number of CPorts supported by the UniPro IP */
size_t num_cports;
/* Host device buffer constraints */
size_t buffer_size_max;
@ -109,7 +112,8 @@ struct greybus_host_device {
struct greybus_host_device *greybus_create_hd(struct greybus_host_driver *hd,
struct device *parent,
size_t buffer_size_max);
size_t buffer_size_max,
size_t num_cports);
int greybus_endo_setup(struct greybus_host_device *hd, u16 endo_id,
u8 ap_intf_id);
void greybus_remove_hd(struct greybus_host_device *hd);
@ -191,9 +195,9 @@ static inline int is_gb_connection(const struct device *dev)
return dev->type == &greybus_connection_type;
}
static inline bool cport_id_valid(u16 cport_id)
static inline bool cport_id_valid(struct greybus_host_device *hd, u16 cport_id)
{
return cport_id != CPORT_ID_BAD && cport_id <= CPORT_ID_MAX;
return cport_id != CPORT_ID_BAD && cport_id < hd->num_cports;
}
#endif /* __KERNEL__ */

2
drivers/staging/greybus/interface.c
View File

@ -84,7 +84,7 @@ int gb_create_bundle_connection(struct gb_interface *intf, u8 class)
bundle_id = GB_CONTROL_BUNDLE_ID;
cport_id = GB_CONTROL_CPORT_ID;
ida_start = 0;
ida_end = CPORT_ID_MAX;
ida_end = intf->hd->num_cports - 1;
} else if (class == GREYBUS_CLASS_SVC) {
protocol_id = GREYBUS_PROTOCOL_SVC;
bundle_id = GB_SVC_BUNDLE_ID;