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[gve] Use raw DMA addresses in descriptors in DQO-QPL mode

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The DQO-QPL operating mode uses registered queue page lists but still
requires the raw DMA address (rather than the linear offset within the
QPL) to be provided in transmit and receive descriptors.

Set the queue page list base device address appropriately.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-10-10 12:44:01 +01:00
parent 1cc1f1cd4f
commit f5ca1de738
2 changed files with 5 additions and 4 deletions
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2
src/drivers/net/gve.c
View File

@@ -938,7 +938,7 @@ static int gve_alloc_qpl ( struct gve_nic *gve, struct gve_qpl *qpl,
qpl->data = dma_umalloc ( gve->dma, &qpl->map, len, GVE_ALIGN );
if ( ! qpl->data )
return -ENOMEM;
qpl->base = ( ( gve->mode & GVE_MODE_QPL ) ?
qpl->base = ( ( gve->mode == GVE_MODE_QPL ) ?
0 : dma ( &qpl->map, qpl->data ) );
DBGC ( gve, "GVE %p QPL %#08x at [%08lx,%08lx)\n",

7
src/drivers/net/gve.h
View File

@@ -530,9 +530,10 @@ struct gve_qpl {
unsigned int id;
/** Queue page list base device address
*
* This will be zero if queue page list addressing is in use,
* or the DMA address of the first page if raw DMA addressing
* is in use.
* This will be zero in the GQI-QPL operating mode, or the DMA
* address of the first page in any other operating mode.
* (Despite its name, DQO-QPL still requires the use of raw
* DMA addresses in transmit and receive descriptors.)
*/
physaddr_t base;
};