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[gve] Add concept of a queue page list base device address

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Allow for the existence of a queue page list where the base device
address is non-zero, as will be the case for the raw DMA addressing
(RDA) operating mode.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-09-29 12:04:13 +01:00
parent 91db5b68ff
commit 9f554ec9d0
2 changed files with 27 additions and 6 deletions
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26
src/drivers/net/gve.c
View File

@@ -848,14 +848,14 @@ static void gve_free_qpl ( struct gve_nic *nic __unused,
} }
/** /**
* Get buffer address (within queue page list address space) * Get buffer offset (within queue page list allocation)
* *
* @v queue Descriptor queue * @v queue Descriptor queue
* @v index Buffer index * @v index Buffer index
* @ret addr Buffer address within queue page list address space * @ret addr Buffer address within queue page list address space
*/ */
static inline __attribute__ (( always_inline)) size_t static inline __attribute__ (( always_inline)) size_t
gve_address ( struct gve_queue *queue, unsigned int index ) { gve_offset ( struct gve_queue *queue, unsigned int index ) {
/* We allocate sufficient pages for the maximum fill level of /* We allocate sufficient pages for the maximum fill level of
* buffers, and reuse the pages in strict rotation as we * buffers, and reuse the pages in strict rotation as we
@@ -864,6 +864,20 @@ gve_address ( struct gve_queue *queue, unsigned int index ) {
return ( ( index & ( queue->fill - 1 ) ) * GVE_BUF_SIZE ); return ( ( index & ( queue->fill - 1 ) ) * GVE_BUF_SIZE );
} }
/**
* Get buffer address (within queue page list address space)
*
* @v queue Descriptor queue
* @v index Buffer index
* @ret addr Buffer address within queue page list address space
*/
static inline __attribute__ (( always_inline)) physaddr_t
gve_address ( struct gve_queue *queue, unsigned int index ) {
/* Pages are allocated as a single contiguous block */
return ( queue->qpl.base + gve_offset ( queue, index ) );
}
/** /**
* Get buffer address * Get buffer address
* *
@@ -874,8 +888,8 @@ gve_address ( struct gve_queue *queue, unsigned int index ) {
static inline __attribute__ (( always_inline )) void * static inline __attribute__ (( always_inline )) void *
gve_buffer ( struct gve_queue *queue, unsigned int index ) { gve_buffer ( struct gve_queue *queue, unsigned int index ) {
/* Pages are currently allocated as a single contiguous block */ /* Pages are allocated as a single contiguous block */
return ( queue->qpl.data + gve_address ( queue, index ) ); return ( queue->qpl.data + gve_offset ( queue, index ) );
} }
/** /**
@@ -1326,7 +1340,7 @@ static int gve_transmit ( struct net_device *netdev, struct io_buffer *iobuf ) {
DBGC2 ( gve, "GVE %p TX %#04x %#02x:%#02x len %#04x/%#04x at " DBGC2 ( gve, "GVE %p TX %#04x %#02x:%#02x len %#04x/%#04x at "
"%#08zx\n", gve, index, desc->type, desc->count, "%#08zx\n", gve, index, desc->type, desc->count,
be16_to_cpu ( desc->len ), be16_to_cpu ( desc->total ), be16_to_cpu ( desc->len ), be16_to_cpu ( desc->total ),
gve_address ( tx, index ) ); gve_offset ( tx, index ) );
} }
assert ( ( tx->prod - tx->cons ) <= tx->fill ); assert ( ( tx->prod - tx->cons ) <= tx->fill );
@@ -1401,7 +1415,7 @@ static void gve_poll_rx ( struct net_device *netdev ) {
len = be16_to_cpu ( cmplt->len ); len = be16_to_cpu ( cmplt->len );
DBGC2 ( gve, "GVE %p RX %#04x %#02x:%#02x len %#04zx at " DBGC2 ( gve, "GVE %p RX %#04x %#02x:%#02x len %#04zx at "
"%#08zx\n", gve, index, cmplt->seq, cmplt->flags, "%#08zx\n", gve, index, cmplt->seq, cmplt->flags,
len, gve_address ( rx, index ) ); len, gve_offset ( rx, index ) );
/* Accumulate a complete packet */ /* Accumulate a complete packet */
if ( cmplt->flags & GVE_RXF_ERROR ) { if ( cmplt->flags & GVE_RXF_ERROR ) {

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

@@ -524,6 +524,13 @@ struct gve_qpl {
unsigned int count; unsigned int count;
/** Queue page list ID */ /** Queue page list ID */
unsigned int id; 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.
*/
physaddr_t base;
}; };
/** /**