On Thu, Mar 28, 2024 at 04:49:04PM +0530, Kiran K wrote: > Add to support to download firmware. > > Signed-off-by: Kiran K <kiran.k@xxxxxxxxx> > Co-developed-by: Chandrashekar <chandrashekar.devegowda@xxxxxxxxx> > Signed-off-by: Chandrashekar <chandrashekar.devegowda@xxxxxxxxx> > + /* Due to the fw limitation, the type header of the packet should be > + * 4 bytes unlikely 1 byte for UART. In UART, the firmware can reads s/unlikely/unlike/ (I think?) s/can reads/can read/ > + * the first byte to get the packet type and redirect the rest of data > + * packet to the right handler. But for PCIe, THF(Transfer Flow Handler) > + * fetches the 4 bytes of data from DMA memory and by the time it reads > + * the first 4 bytes, it already consumes some part of packet. Thus > + * the packet type indicator for iBT PCIe is 4 bytes. > + * Luckily, when HCI core creates the skb, it allocated 8 bytes of > + * head room for profile and driver use, and before sending the data > + * to the device, append the iBT PCIe packet type in the front. > + */
