[sync] Apply C API rubric to libsync

Test: No behavior change
Change-Id: I30a413f7fb5d3f4e741e5204532b82e73595c086

[clock] zx_clock_get(ZX_CLOCK_MONOTONIC) -> zx_clock_get_monotonic()

Test: no functional change

Change-Id: Iaa513c521d96b178458acc707be3646067971701

[dev][usb][xhci] Disable xdc_bind error message when not on x64

Change-Id: Ic6e5e2c28cf1b3c855a671c2c8ed32e89f2e1a0d

[dev][xdc] Beginnings of XHCI Debug Capability.

Polling / transfers left to future CL.

Change-Id: Ic8ab93d1fa4449781356237468d17f09468fba52

[dev][xhci] Generalize extended capability searching logic into
xhci_get_next_ext_cap.

This is as we also need to search for the debug capability in the XDC
driver.

Change-Id: I4eab6a107f5b4b32a0775acc3cc24e85fe80b47a

[dev][xhci] Switch to using io_buffer_physmap

io_buffer_physmap_range has dubious lifetime management, which will be
resolved soon. However, the resolution will force bookkeeping on the
caller, which is unncessary in this usecase.

Change-Id: I92a7028ecd2eb758beb29032d3521818b12d0e53

[ddk][io-buffer] Rename callsites of io_buffer_init*_with_bti

ZX-1804 #comment Move all zircon callsites to final name

Change-Id: Ie35de5654841e84653582126dc1f976664c0f49d

[dev][usb][xhci] Modify transfer ring and event ring init
to take the ring pointer and bti handle rather than xhci struct.

Would like to reuse these components for xhci debug capability,
but don't want to share the same xhci structure.

Change-Id: I440036a24483855e6618e9477682ec45100f4650

[dev][usb][xhci] Fix some problems in driver shut-down path:

- Free our BTI handle last, so we don't fail unpinning when releasing io_buffers.

- Shut down the device enumeration thread before stopping the controller.
Otherwise we hang when trying to clean up device slots

Change-Id: I11ab688ba67c0ab46241f5478523b527e81b6604

[dev][usb][xhci] Switch to io_buffer_init_with_bti()

Change-Id: I8aeaafe864c003689760c4233072db4fb4b82108

[dev][usb][xhci] Always use cached buffers on x86

ZX-1816

Change-Id: I239271271230fa6b4c36f62c269e7d9ef942c61e

[dev][usb][xhci] Use uncached io_buffers and eliminate cache flushing/invalidating

Now we only need a memory barrier before ringing the doorbell
after queueing new requests in the command ring.

Change-Id: Ie7e2a6c8761fc624c2c5e143636ffc71cec25aad

[dev][usb-xhci] Fix bug with passing the number of interrupts to set_irq_mode.

xhci->num_interrupts is not initialized until after interrupts are
configured, so we can't use it in the call to set_irq_mode.

ZX-1789 #done

Change-Id: Ic4b7ca65698332f2d56365ec7730b92d6e821ef0

[ddk][io-buffer] Improve safety of io_buffer_phys()

Populating the io_buffer_t's phys field for non-contiguous buffers is a
set-up for accidentally issuing DMA to incorrect addresses, since
io_buffer_phys() will still work. This patch causes io_buffer_phys()
to trip a ZX_DEBUG_ASSERT if it is used on a non-contiguous buffer.

Change-Id: I7dbae4a7d3b548a96b19c5e596c17d058004980b

[syscalls] Rename zx_time_get to zx_clock_get

This change frees up the get() method in for a zx_time_t accessor in the
zx::time class.

Change-Id: Ia4cdc7e3e558df5ba0cfeedb27a442abf4d6f305

[dev][usb][xhci] Two DMA cache management fixes:

- Invalidate device context buffer after allocating it so the VM system's
zeroing of the buffer does not interfere with the controller writing to it

- Add two missing xhci_cache_flush() in xhci_handle-enumerate_device()

Fixes USB breakage on ARM that was introduced by
https://fuchsia-review.googlesource.com/c/zircon/+/103016

Change-Id: Id50cfe9a4dcd3927b2f7d695662963290206319d

[dev][usb][xhci] Use zx_cache_flush instead of zx_vmo_op_range for cache management

Change-Id: I261246de12f4c915b485dfb15830d084658e9ffc

[ddk] rename dprintf() to zxlogf() to avoid conflicts

dprintf is still defined by ddk/debug.h but with a deprecation warning

Change-Id: I00b34803571c468007e069c1da6a292feba2bc3c

[dev][xhci] XHCI interrupt handling fixes

- Don't update event ring dequeue pointer and clear the
event handler busy flag until we have processed all the new events
in the event ring.

- Always clear the interrupt pending flag in the IMAN register

- Don't bother clearing the EINT and PCD bits in the USBSTS register.
According to the XHCI specification, clearing these bits aren't needed
for acknowledging interrupts.

- Use the port status change event instead of the USBSTS_PCD bit
for handling root hub events.

This makes USB more stable on Gauss and might help with ZX-1221

Change-Id: Ie927b6e019930a69c7f0c4f5907153a6c944cdbc

[dev][usb] Migrate xhci to usb_request.

Change-Id: Ifd0ceb3f033d530e70c88fc80321cf9fc0be8f40

[ddk][io-buffer] Add io_buffer_physmap for storing physical pages
of non contiguous buffers.

Renamed original io_buffer_physmap to io_buffer_physmap_range.

Will add a way of iterating over it in usb request in a future CL.

Change-Id: Iab8c8621cfe0ec4a63a8dbe7c7d6a09d8e0bd44a

[dev][usb-xhci] Fix xhci driver unbind path

This is needed for shutting down xhci when switching from host
to peripheral role.

Change-Id: I83b154060374ef9c94fee4c994e5919f382f2679

[dev][usb][xhci] Clean and invalidate caches as necessary on non-x86 platforms

Also made VMOs for event rings and device contexts read-only

Change-Id: I1aee51c7ba4515523219826fc0b013d6771e514b

[dev][usb][xhci] Use io-buffers instead of raw VMOs for DMA memory

Change-Id: Iec8c48ae077dd3f6ff789d861d872446d2f3d28c

[dev][usb][xhci] Add support for binding to a platform device

We will use this for XHCI support on platforms with dwc3 IP.

Change-Id: I2414ba9d6e7b1ecbf82506b9163480cc3dfe9212

[zx] Magenta -> Zircon

The Great Renaming is here!

Change-Id: I3229bdeb2a3d0e40fb4db6fec8ca7d971fbffb94

[dev][xhci] Switch to new DDK dprintf() logging calls

Change-Id: I629e2b486de24749fb217e63d4ca40cb39b14390

[usb][xhci] Use two interrupts / completers, isoch transfers are sent to
HIGH_PRIORITY thread.

MG-937 #comment

Change-Id: Ibaa2eb3c2fea12164d141966ef8f18d48688ccf1

[usb] add support for canceling and timing out transactions

Added usb_cancel_all() to the USB protocol, which cancels all
pending iotxns on an endpoint.

The "timeout" parameter to usb_control() is now being honored.

Also replaced the "enabled", "halted" and endpoint flags with
a new xhci_ep_state_t enum.

To avoid confusion, the endpoint state in the hardware's endpoint context
has been renamed from EP_STATE_* to EP_CTX_STATE_* and the accessor
has been renamed to xhci_get_ep_ctx_state()

Change-Id: Id4daafc88c4767e8723deeed373b5321440469b9

[xhci] Fix interruptor typo

Change-Id: I325b8d492ea4b30acd08330173968f979fc8be05

[xhci] move bus mastering to after stopping controller.

Reapplies commit 4a8ec2834232150c830a65306fa997fa7640d977 which was reverted
by a164c3bde4d317919192831f8d97c7547ec8b4a9.

The original change was causing a large stall in boot due to bus mastering
being disabled on boot. https://fuchsia-review.googlesource.com/#/c/41110/
resolves that issue.

MG-928 #done

Change-Id: I5efd58eb42c3407e41a5528ae30b8bcffd6c119c

Revert "[xhci] move bus mastering to after stopping controller."

This reverts commit 4a8ec2834232150c830a65306fa997fa7640d977, was causing a slowdown on boot

Change-Id: I28b688285352f2e93dc5b019a91afe99ccf3c162

[xhci] move bus mastering to after stopping controller.

MG-928 #done

Change-Id: Ifc6bb9d53f65f60a0f7510e36d68f608fea4c106

[usb] Set the interrupter modulation interval

The default was 1ms, which is a little slow for bulk ethernet transfers.

Change-Id: I5e4b74cc613a93ab2516bd65a99427613e46487a

[usb] Revert changes related to canceling USB transactions

These changes introduced a number of bugs and need more work.

Squashed commit of:

Revert "[usb] add support for canceling and timing out transactions"

This reverts commit b986f57f0d5776585086d1eb6a99d65cdcff2486.

Revert "[dev][usb-xhci] Endpoint state cleanup work"

This reverts commit 5d8c3e1594c0f8161c1e2ca8e80533d0e83f5c8e.

Revert "[dev][usb-xhci] Cleanup completing transactions when stopping an endpoint"

This reverts commit cdbc4364957bc9c3067caba54adfb73fae887f03.

Change-Id: I1ab9ba1fbc06ba9e992ec71bb41ecf2465e72e29

[dev][usb-xhci] Endpoint state cleanup work

Replace the "enabled", "halted" and "stopped_reason" endpoint flags with
a new xhci_ep_state_t enum.

To avoid confusion, the endpoint state in the hardware's endpoint context
has been renamed from EP_STATE_* to EP_CTX_STATE_* and the accessor
has been renamed to xhci_get_ep_ctx_state()

Change-Id: I195d688948d4ca65db395205e35f52145893d400

[udev][usb-xhci] Add support for timing out controller commands

In particular, we now time out and retry "address device" commands
during initial device setup.
This fixes problems enumerating devices that do not respond to the
first SET_ADDRESS control request.

Change-Id: Ic0d7c8804bdeed8e90c7338f9dfc061fbe16940f

[udev][usb-xhci] Recover from stalls during device enumeration

The asix-88179 based Plugable USB ethernet/hub combo has an intermittent problem
where the initial get device descriptor command will fail, resulting in the
USB 2.0 side of the hub not to enumerate.
Catching this and clearing the stall allows us to recover.

Also added accessor for reading endpoint state from the endpoint context.

Change-Id: I33a1f78513c55fd2d16d44d8dfaac979ccfc2b23

[dev][usb] Use new magenta error names

Change-Id: Ie4901fe957ee96cf7c7d425a948c1b66a0d3a0f3

[udev][usb-xhci] rename

Change-Id: I9301fac7ba04cb881cbc84cc4d34f9a3061ed848