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Re: [PATCH v3 08/10] drivers/char: mark DMA buffers as reserved for the XHCI
- To: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 5 Aug 2022 09:05:27 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Fri, 05 Aug 2022 07:05:46 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 26.07.2022 05:23, Marek Marczykowski-Górecki wrote:
> @@ -1046,13 +1047,20 @@ static struct uart_driver dbc_uart_driver = {
> .flush = dbc_uart_flush,
> };
>
> -static struct xhci_trb evt_trb[DBC_TRB_RING_CAP];
> -static struct xhci_trb out_trb[DBC_TRB_RING_CAP];
> -static struct xhci_trb in_trb[DBC_TRB_RING_CAP];
> -static struct xhci_erst_segment erst __aligned(64);
> -static struct xhci_dbc_ctx ctx __aligned(64);
Why the change from 64 ...
> -static uint8_t out_wrk_buf[DBC_WORK_RING_CAP] __aligned(DBC_PAGE_SIZE);
> -static struct xhci_string_descriptor str_buf[DBC_STRINGS_COUNT];
> +struct dbc_dma_bufs {
> + struct xhci_trb evt_trb[DBC_TRB_RING_CAP];
> + struct xhci_trb out_trb[DBC_TRB_RING_CAP];
> + struct xhci_trb in_trb[DBC_TRB_RING_CAP];
> + uint8_t out_wrk_buf[DBC_WORK_RING_CAP] __aligned(DBC_PAGE_SIZE);
> + struct xhci_erst_segment erst __aligned(16);
> + struct xhci_dbc_ctx ctx __aligned(16);
... to 16?
Jan
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