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husb: Make control transactions asynchronous (Max Krasnyansky)
USB is 99.8% async now :). 0.2% is the three control requests that we need to execute synchronously. We could off-load that to a thread or something but it's not worth the pain since those requests are performed only during device initialization (ie when device is connected to the VM). The change is a bit bigger than I wanted due to the fact that generic handle_packet()/handle_control() interface was not designed for async transactions. So I ended up adding custom handle_packet() code to usb-linux. We can make that generic if/when some other component needs it. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5204 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori
parent
9d0efc88e4
commit
446ab1284e
464
usb-linux.c
464
usb-linux.c
@ -25,28 +25,20 @@
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.h"
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#include "qemu-timer.h"
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#include "hw/usb.h"
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#include "console.h"
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#if defined(__linux__)
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#include <dirent.h>
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#include <sys/ioctl.h>
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#include <linux/usbdevice_fs.h>
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#include <linux/version.h>
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#include <signal.h>
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/* We redefine it to avoid version problems */
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struct usb_ctrltransfer {
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uint8_t bRequestType;
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uint8_t bRequest;
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uint16_t wValue;
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uint16_t wIndex;
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uint16_t wLength;
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uint32_t timeout;
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void *data;
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};
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#include <linux/usb/ch9.h>
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#include <linux/usbdevice_fs.h>
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#include <linux/version.h>
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#include "hw/usb.h"
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typedef int USBScanFunc(void *opaque, int bus_num, int addr, int class_id,
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int vendor_id, int product_id,
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@ -54,7 +46,6 @@ typedef int USBScanFunc(void *opaque, int bus_num, int addr, int class_id,
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static int usb_host_find_device(int *pbus_num, int *paddr,
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char *product_name, int product_name_size,
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const char *devname);
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//#define DEBUG
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#ifdef DEBUG
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@ -67,14 +58,32 @@ static int usb_host_find_device(int *pbus_num, int *paddr,
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#define PRODUCT_NAME_SZ 32
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#define MAX_ENDPOINTS 16
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struct sigaction sigact;
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/* endpoint association data */
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struct endp_data {
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uint8_t type;
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uint8_t halted;
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};
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enum {
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CTRL_STATE_IDLE = 0,
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CTRL_STATE_SETUP,
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CTRL_STATE_DATA,
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CTRL_STATE_ACK
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};
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/*
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* Control transfer state.
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* Note that 'buffer' _must_ follow 'req' field because
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* we need contigious buffer when we submit control URB.
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*/
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struct ctrl_struct {
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uint16_t len;
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uint16_t offset;
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uint8_t state;
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struct usb_ctrlrequest req;
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uint8_t buffer[1024];
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};
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typedef struct USBHostDevice {
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USBDevice dev;
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int fd;
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@ -82,8 +91,10 @@ typedef struct USBHostDevice {
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uint8_t descr[1024];
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int descr_len;
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int configuration;
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int ninterfaces;
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int closing;
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struct ctrl_struct ctrl;
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struct endp_data endp_table[MAX_ENDPOINTS];
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/* Host side address */
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@ -172,6 +183,26 @@ static void async_free(AsyncURB *aurb)
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qemu_free(aurb);
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}
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static void async_complete_ctrl(USBHostDevice *s, USBPacket *p)
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{
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switch(s->ctrl.state) {
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case CTRL_STATE_SETUP:
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if (p->len < s->ctrl.len)
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s->ctrl.len = p->len;
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s->ctrl.state = CTRL_STATE_DATA;
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p->len = 8;
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break;
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case CTRL_STATE_ACK:
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s->ctrl.state = CTRL_STATE_IDLE;
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p->len = 0;
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break;
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default:
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break;
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}
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}
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static void async_complete(void *opaque)
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{
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USBHostDevice *s = opaque;
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@ -204,6 +235,8 @@ static void async_complete(void *opaque)
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switch (aurb->urb.status) {
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case 0:
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p->len = aurb->urb.actual_length;
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if (aurb->urb.type == USBDEVFS_URB_TYPE_CONTROL)
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async_complete_ctrl(s, p);
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break;
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case -EPIPE:
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@ -237,7 +270,7 @@ static void async_cancel(USBPacket *unused, void *opaque)
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}
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}
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static int usb_host_update_interfaces(USBHostDevice *dev, int configuration)
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static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration)
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{
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int dev_descr_len, config_descr_len;
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int interface, nb_interfaces, nb_configurations;
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@ -246,6 +279,8 @@ static int usb_host_update_interfaces(USBHostDevice *dev, int configuration)
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if (configuration == 0) /* address state - ignore */
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return 1;
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dprintf("husb: claiming interfaces. config %d\n", configuration);
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i = 0;
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dev_descr_len = dev->descr[0];
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if (dev_descr_len > dev->descr_len)
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@ -265,8 +300,10 @@ static int usb_host_update_interfaces(USBHostDevice *dev, int configuration)
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printf("husb: config #%d need %d\n", dev->descr[i + 5], configuration);
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if (configuration < 0 || configuration == dev->descr[i + 5])
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if (configuration < 0 || configuration == dev->descr[i + 5]) {
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configuration = dev->descr[i + 5];
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break;
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}
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i += config_descr_len;
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}
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@ -310,17 +347,37 @@ static int usb_host_update_interfaces(USBHostDevice *dev, int configuration)
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printf("husb: %d interfaces claimed for configuration %d\n",
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nb_interfaces, configuration);
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dev->ninterfaces = nb_interfaces;
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dev->configuration = configuration;
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return 1;
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}
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static int usb_host_release_interfaces(USBHostDevice *s)
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{
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int ret, i;
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dprintf("husb: releasing interfaces\n");
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for (i = 0; i < s->ninterfaces; i++) {
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ret = ioctl(s->fd, USBDEVFS_RELEASEINTERFACE, &i);
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if (ret < 0) {
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perror("husb: failed to release interface");
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return 0;
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}
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}
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return 1;
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}
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static void usb_host_handle_reset(USBDevice *dev)
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{
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USBHostDevice *s = (USBHostDevice *)dev;
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USBHostDevice *s = (USBHostDevice *) dev;
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dprintf("husb: reset device %u.%u\n", s->bus_num, s->addr);
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ioctl(s->fd, USBDEVFS_RESET);
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usb_host_update_interfaces(s, s->configuration);
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usb_host_claim_interfaces(s, s->configuration);
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}
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static void usb_host_handle_destroy(USBDevice *dev)
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@ -343,73 +400,10 @@ static void usb_host_handle_destroy(USBDevice *dev)
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static int usb_linux_update_endp_table(USBHostDevice *s);
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static int usb_host_handle_control(USBDevice *dev,
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int request,
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int value,
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int index,
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int length,
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uint8_t *data)
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static int usb_host_handle_data(USBHostDevice *s, USBPacket *p)
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{
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USBHostDevice *s = (USBHostDevice *)dev;
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struct usb_ctrltransfer ct;
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struct usbdevfs_setinterface si;
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int intf_update_required = 0;
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int ret;
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if (request == (DeviceOutRequest | USB_REQ_SET_ADDRESS)) {
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/* specific SET_ADDRESS support */
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dev->addr = value;
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return 0;
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} else if (request == ((USB_RECIP_INTERFACE << 8) |
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USB_REQ_SET_INTERFACE)) {
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/* set alternate setting for the interface */
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si.interface = index;
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si.altsetting = value;
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ret = ioctl(s->fd, USBDEVFS_SETINTERFACE, &si);
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usb_linux_update_endp_table(s);
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} else if (request == (DeviceOutRequest | USB_REQ_SET_CONFIGURATION)) {
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dprintf("husb: ctrl set config %d\n", value & 0xff);
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if (s->configuration != (value & 0xff)) {
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s->configuration = (value & 0xff);
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intf_update_required = 1;
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}
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goto do_request;
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} else {
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do_request:
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ct.bRequestType = request >> 8;
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ct.bRequest = request;
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ct.wValue = value;
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ct.wIndex = index;
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ct.wLength = length;
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ct.timeout = 50;
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ct.data = data;
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ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
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dprintf("husb: ctrl req 0x%x val 0x%x index %u len %u ret %d\n",
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ct.bRequest, ct.wValue, ct.wIndex, ct.wLength, ret);
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}
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if (ret < 0) {
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switch(errno) {
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case ETIMEDOUT:
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return USB_RET_NAK;
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default:
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return USB_RET_STALL;
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}
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} else {
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if (intf_update_required) {
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dprintf("husb: updating interfaces\n");
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usb_host_update_interfaces(s, value & 0xff);
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}
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return ret;
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}
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}
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static int usb_host_handle_data(USBDevice *dev, USBPacket *p)
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{
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USBHostDevice *s = (USBHostDevice *) dev;
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AsyncURB *aurb;
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struct usbdevfs_urb *urb;
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AsyncURB *aurb;
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int ret;
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aurb = async_alloc();
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@ -474,12 +468,292 @@ static int usb_host_handle_data(USBDevice *dev, USBPacket *p)
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return USB_RET_ASYNC;
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}
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static int ctrl_error(void)
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{
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if (errno == ETIMEDOUT)
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return USB_RET_NAK;
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else
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return USB_RET_STALL;
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}
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static int usb_host_set_address(USBHostDevice *s, int addr)
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{
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dprintf("husb: ctrl set addr %u\n", addr);
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s->dev.addr = addr;
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return 0;
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}
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static int usb_host_set_config(USBHostDevice *s, int config)
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{
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usb_host_release_interfaces(s);
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int ret = ioctl(s->fd, USBDEVFS_SETCONFIGURATION, &config);
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dprintf("husb: ctrl set config %d ret %d errno %d\n", config, ret, errno);
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if (ret < 0)
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return ctrl_error();
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usb_host_claim_interfaces(s, config);
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return 0;
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}
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static int usb_host_set_interface(USBHostDevice *s, int iface, int alt)
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{
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struct usbdevfs_setinterface si;
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int ret;
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si.interface = iface;
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si.altsetting = alt;
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ret = ioctl(s->fd, USBDEVFS_SETINTERFACE, &si);
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dprintf("husb: ctrl set iface %d altset %d ret %d errno %d\n",
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iface, alt, ret, errno);
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if (ret < 0)
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return ctrl_error();
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usb_linux_update_endp_table(s);
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return 0;
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}
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static int usb_host_handle_control(USBHostDevice *s, USBPacket *p)
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{
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struct usbdevfs_urb *urb;
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AsyncURB *aurb;
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int ret, value, index;
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/*
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* Process certain standard device requests.
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* These are infrequent and are processed synchronously.
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*/
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value = le16_to_cpu(s->ctrl.req.wValue);
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index = le16_to_cpu(s->ctrl.req.wIndex);
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dprintf("husb: ctrl type 0x%x req 0x%x val 0x%x index %u len %u\n",
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s->ctrl.req.bRequestType, s->ctrl.req.bRequest, value, index,
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s->ctrl.len);
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if (s->ctrl.req.bRequestType == 0) {
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switch (s->ctrl.req.bRequest) {
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case USB_REQ_SET_ADDRESS:
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return usb_host_set_address(s, value);
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case USB_REQ_SET_CONFIGURATION:
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return usb_host_set_config(s, value & 0xff);
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}
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}
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if (s->ctrl.req.bRequestType == 1 &&
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s->ctrl.req.bRequest == USB_REQ_SET_INTERFACE)
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return usb_host_set_interface(s, index, value);
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/* The rest are asynchronous */
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aurb = async_alloc();
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if (!aurb) {
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dprintf("husb: async malloc failed\n");
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return USB_RET_NAK;
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}
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aurb->hdev = s;
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aurb->packet = p;
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/*
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* Setup ctrl transfer.
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*
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* s->ctrl is layed out such that data buffer immediately follows
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* 'req' struct which is exactly what usbdevfs expects.
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*/
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urb = &aurb->urb;
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urb->type = USBDEVFS_URB_TYPE_CONTROL;
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urb->endpoint = p->devep;
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urb->buffer = &s->ctrl.req;
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urb->buffer_length = 8 + s->ctrl.len;
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urb->usercontext = s;
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ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
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dprintf("husb: submit ctrl. len %u aurb %p\n", urb->buffer_length, aurb);
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if (ret < 0) {
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dprintf("husb: submit failed. errno %d\n", errno);
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async_free(aurb);
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switch(errno) {
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case ETIMEDOUT:
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return USB_RET_NAK;
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case EPIPE:
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default:
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return USB_RET_STALL;
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}
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}
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usb_defer_packet(p, async_cancel, aurb);
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return USB_RET_ASYNC;
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}
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static int do_token_setup(USBDevice *dev, USBPacket *p)
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{
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USBHostDevice *s = (USBHostDevice *) dev;
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int ret = 0;
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if (p->len != 8)
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return USB_RET_STALL;
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memcpy(&s->ctrl.req, p->data, 8);
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s->ctrl.len = le16_to_cpu(s->ctrl.req.wLength);
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s->ctrl.offset = 0;
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s->ctrl.state = CTRL_STATE_SETUP;
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if (s->ctrl.req.bRequestType & USB_DIR_IN) {
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ret = usb_host_handle_control(s, p);
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if (ret < 0)
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return ret;
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if (ret < s->ctrl.len)
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s->ctrl.len = ret;
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s->ctrl.state = CTRL_STATE_DATA;
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} else {
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if (s->ctrl.len == 0)
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s->ctrl.state = CTRL_STATE_ACK;
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else
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s->ctrl.state = CTRL_STATE_DATA;
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}
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return ret;
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}
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static int do_token_in(USBDevice *dev, USBPacket *p)
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{
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USBHostDevice *s = (USBHostDevice *) dev;
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int ret = 0;
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if (p->devep != 0)
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return usb_host_handle_data(s, p);
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switch(s->ctrl.state) {
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case CTRL_STATE_ACK:
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if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
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ret = usb_host_handle_control(s, p);
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if (ret == USB_RET_ASYNC)
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return USB_RET_ASYNC;
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s->ctrl.state = CTRL_STATE_IDLE;
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return ret > 0 ? 0 : ret;
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}
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return 0;
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case CTRL_STATE_DATA:
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if (s->ctrl.req.bRequestType & USB_DIR_IN) {
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int len = s->ctrl.len - s->ctrl.offset;
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if (len > p->len)
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len = p->len;
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memcpy(p->data, s->ctrl.buffer + s->ctrl.offset, len);
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s->ctrl.offset += len;
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if (s->ctrl.offset >= s->ctrl.len)
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s->ctrl.state = CTRL_STATE_ACK;
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return len;
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}
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s->ctrl.state = CTRL_STATE_IDLE;
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return USB_RET_STALL;
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default:
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return USB_RET_STALL;
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}
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}
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static int do_token_out(USBDevice *dev, USBPacket *p)
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{
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USBHostDevice *s = (USBHostDevice *) dev;
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if (p->devep != 0)
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return usb_host_handle_data(s, p);
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switch(s->ctrl.state) {
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case CTRL_STATE_ACK:
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||||
if (s->ctrl.req.bRequestType & USB_DIR_IN) {
|
||||
s->ctrl.state = CTRL_STATE_IDLE;
|
||||
/* transfer OK */
|
||||
} else {
|
||||
/* ignore additional output */
|
||||
}
|
||||
return 0;
|
||||
|
||||
case CTRL_STATE_DATA:
|
||||
if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
|
||||
int len = s->ctrl.len - s->ctrl.offset;
|
||||
if (len > p->len)
|
||||
len = p->len;
|
||||
memcpy(s->ctrl.buffer + s->ctrl.offset, p->data, len);
|
||||
s->ctrl.offset += len;
|
||||
if (s->ctrl.offset >= s->ctrl.len)
|
||||
s->ctrl.state = CTRL_STATE_ACK;
|
||||
return len;
|
||||
}
|
||||
|
||||
s->ctrl.state = CTRL_STATE_IDLE;
|
||||
return USB_RET_STALL;
|
||||
|
||||
default:
|
||||
return USB_RET_STALL;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Packet handler.
|
||||
* Called by the HC (host controller).
|
||||
*
|
||||
* Returns length of the transaction or one of the USB_RET_XXX codes.
|
||||
*/
|
||||
int usb_host_handle_packet(USBDevice *s, USBPacket *p)
|
||||
{
|
||||
switch(p->pid) {
|
||||
case USB_MSG_ATTACH:
|
||||
s->state = USB_STATE_ATTACHED;
|
||||
return 0;
|
||||
|
||||
case USB_MSG_DETACH:
|
||||
s->state = USB_STATE_NOTATTACHED;
|
||||
return 0;
|
||||
|
||||
case USB_MSG_RESET:
|
||||
s->remote_wakeup = 0;
|
||||
s->addr = 0;
|
||||
s->state = USB_STATE_DEFAULT;
|
||||
s->handle_reset(s);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Rest of the PIDs must match our address */
|
||||
if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
|
||||
return USB_RET_NODEV;
|
||||
|
||||
switch (p->pid) {
|
||||
case USB_TOKEN_SETUP:
|
||||
return do_token_setup(s, p);
|
||||
|
||||
case USB_TOKEN_IN:
|
||||
return do_token_in(s, p);
|
||||
|
||||
case USB_TOKEN_OUT:
|
||||
return do_token_out(s, p);
|
||||
|
||||
default:
|
||||
return USB_RET_STALL;
|
||||
}
|
||||
}
|
||||
|
||||
/* returns 1 on problem encountered or 0 for success */
|
||||
static int usb_linux_update_endp_table(USBHostDevice *s)
|
||||
{
|
||||
uint8_t *descriptors;
|
||||
uint8_t devep, type, configuration, alt_interface;
|
||||
struct usb_ctrltransfer ct;
|
||||
struct usbdevfs_ctrltransfer ct;
|
||||
int interface, ret, length, i;
|
||||
|
||||
ct.bRequestType = USB_DIR_IN;
|
||||
@ -624,10 +898,14 @@ static USBDevice *usb_host_device_open_addr(int bus_num, int addr, const char *p
|
||||
#endif
|
||||
|
||||
dev->fd = fd;
|
||||
dev->configuration = 1;
|
||||
|
||||
/* XXX - do something about initial configuration */
|
||||
if (!usb_host_update_interfaces(dev, -1))
|
||||
/*
|
||||
* Initial configuration is -1 which makes us claim first
|
||||
* available config. We used to start with 1, which does not
|
||||
* always work. I've seen devices where first config starts
|
||||
* with 2.
|
||||
*/
|
||||
if (!usb_host_claim_interfaces(dev, -1))
|
||||
goto fail;
|
||||
|
||||
ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
|
||||
@ -646,11 +924,9 @@ static USBDevice *usb_host_device_open_addr(int bus_num, int addr, const char *p
|
||||
dev->dev.speed = USB_SPEED_LOW;
|
||||
else
|
||||
dev->dev.speed = USB_SPEED_HIGH;
|
||||
dev->dev.handle_packet = usb_generic_handle_packet;
|
||||
|
||||
dev->dev.handle_reset = usb_host_handle_reset;
|
||||
dev->dev.handle_control = usb_host_handle_control;
|
||||
dev->dev.handle_data = usb_host_handle_data;
|
||||
dev->dev.handle_packet = usb_host_handle_packet;
|
||||
dev->dev.handle_reset = usb_host_handle_reset;
|
||||
dev->dev.handle_destroy = usb_host_handle_destroy;
|
||||
|
||||
if (!prod_name || prod_name[0] == '\0')
|
||||
@ -1055,6 +1331,8 @@ void usb_host_info(void)
|
||||
|
||||
#else
|
||||
|
||||
#include "hw/usb.h"
|
||||
|
||||
void usb_host_info(void)
|
||||
{
|
||||
term_printf("USB host devices not supported\n");
|
||||
|
||||
Loading…
Reference in New Issue
Block a user