net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NUL

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NULL with the justification that there's no need
to set tx_info->xdpf to NULL and tx_info->num_of_bufs to 0 in case
of a mapping error. Both values won't be used once the mapping function
returns an error, and their values would be overridden by the next
transmitted packet.

While both values do indeed get overridden in the next transmission
call, the value of tx_info->xdpf is also used to check whether a TX
descriptor's transmission has been completed (i.e. a completion for it
was polled).

An example scenario:
1. Mapping failed, tx_info->xdpf wasn't set to NULL
2. A VF reset occurred leading to IO resource destruction and
a call to ena_free_tx_bufs() function
3. Although the descriptor whose mapping failed was freed by the
transmission function, it still passes the check
if (!tx_info->skb)

(skb and xdp_frame are in a union)
4. The xdp_frame associated with the descriptor is freed twice

This patch returns the assignment of NULL to tx_info->xdpf to make the
cleaning function knows that the descriptor is already freed.

Fixes: 504fd6a5390c ("net: ena: fix DMA mapping function issues in XDP")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

[ Upstream commit 911a8c960110b03ed519ce43ea6c9990a0ee0ceb ]

When an XDP program is loaded the existing channels in the driver split
int

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

[ Upstream commit 911a8c960110b03ed519ce43ea6c9990a0ee0ceb ]

When an XDP program is loaded the existing channels in the driver split
into two halves:
- The first half of the channels contain RX and TX rings, these queues
are used for receiving traffic and sending packets originating from
kernel.
- The second half of the channels contain only a TX ring. These queues
are used for sending packets that were redirected using XDP_TX
or XDP_REDIRECT.

Referring to the queues in the second half of the channels as "xdp_ring"
can be confusing and may give the impression that ENA has the capability
to generate an additional special queue.

This patch ensures that the xdp_ring field is exclusively used to
describe the XDP TX queue that a specific RX queue needs to utilize when
forwarding packets with XDP TX and XDP REDIRECT, preserving the
integrity of the xdp_ring field in ena_ring.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-6-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

[ Upstream commit 39a044f4dcfee1c776603a6589b6fb98a9e222f2 ]

This change will enable the ability to use ena_xmit_common()
in fu

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

[ Upstream commit 39a044f4dcfee1c776603a6589b6fb98a9e222f2 ]

This change will enable the ability to use ena_xmit_common()
in functions that don't have a net_device pointer.
While it can be retrieved by dereferencing
ena_adapter (adapter->netdev), there's no reason to do it in
fast path code where this pointer is only needed for
debug prints.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-3-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Move XDP code to its new files

[ Upstream commit d000574d02870710c62751148cbfe22993222b98 ]

XDP system has a very large footprint in the driver's overall code.
makes the whole driver's co

net: ena: Move XDP code to its new files

[ Upstream commit d000574d02870710c62751148cbfe22993222b98 ]

XDP system has a very large footprint in the driver's overall code.
makes the whole driver's code much harder to read.

Moving XDP code to dedicated files.

This patch doesn't make any changes to the code itself and only
cut-pastes the code into ena_xdp.c and ena_xdp.h files so the change
is purely cosmetic.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-2-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NUL

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NULL with the justification that there's no need
to set tx_info->xdpf to NULL and tx_info->num_of_bufs to 0 in case
of a mapping error. Both values won't be used once the mapping function
returns an error, and their values would be overridden by the next
transmitted packet.

While both values do indeed get overridden in the next transmission
call, the value of tx_info->xdpf is also used to check whether a TX
descriptor's transmission has been completed (i.e. a completion for it
was polled).

An example scenario:
1. Mapping failed, tx_info->xdpf wasn't set to NULL
2. A VF reset occurred leading to IO resource destruction and
a call to ena_free_tx_bufs() function
3. Although the descriptor whose mapping failed was freed by the
transmission function, it still passes the check
if (!tx_info->skb)

(skb and xdp_frame are in a union)
4. The xdp_frame associated with the descriptor is freed twice

This patch returns the assignment of NULL to tx_info->xdpf to make the
cleaning function knows that the descriptor is already freed.

Fixes: 504fd6a5390c ("net: ena: fix DMA mapping function issues in XDP")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

[ Upstream commit 911a8c960110b03ed519ce43ea6c9990a0ee0ceb ]

When an XDP program is loaded the existing channels in the driver split
int

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

[ Upstream commit 911a8c960110b03ed519ce43ea6c9990a0ee0ceb ]

When an XDP program is loaded the existing channels in the driver split
into two halves:
- The first half of the channels contain RX and TX rings, these queues
are used for receiving traffic and sending packets originating from
kernel.
- The second half of the channels contain only a TX ring. These queues
are used for sending packets that were redirected using XDP_TX
or XDP_REDIRECT.

Referring to the queues in the second half of the channels as "xdp_ring"
can be confusing and may give the impression that ENA has the capability
to generate an additional special queue.

This patch ensures that the xdp_ring field is exclusively used to
describe the XDP TX queue that a specific RX queue needs to utilize when
forwarding packets with XDP TX and XDP REDIRECT, preserving the
integrity of the xdp_ring field in ena_ring.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-6-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

[ Upstream commit 39a044f4dcfee1c776603a6589b6fb98a9e222f2 ]

This change will enable the ability to use ena_xmit_common()
in fu

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

[ Upstream commit 39a044f4dcfee1c776603a6589b6fb98a9e222f2 ]

This change will enable the ability to use ena_xmit_common()
in functions that don't have a net_device pointer.
While it can be retrieved by dereferencing
ena_adapter (adapter->netdev), there's no reason to do it in
fast path code where this pointer is only needed for
debug prints.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-3-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Move XDP code to its new files

[ Upstream commit d000574d02870710c62751148cbfe22993222b98 ]

XDP system has a very large footprint in the driver's overall code.
makes the whole driver's co

net: ena: Move XDP code to its new files

[ Upstream commit d000574d02870710c62751148cbfe22993222b98 ]

XDP system has a very large footprint in the driver's overall code.
makes the whole driver's code much harder to read.

Moving XDP code to dedicated files.

This patch doesn't make any changes to the code itself and only
cut-pastes the code into ena_xdp.c and ena_xdp.h files so the change
is purely cosmetic.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-2-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NUL

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NULL with the justification that there's no need
to set tx_info->xdpf to NULL and tx_info->num_of_bufs to 0 in case
of a mapping error. Both values won't be used once the mapping function
returns an error, and their values would be overridden by the next
transmitted packet.

While both values do indeed get overridden in the next transmission
call, the value of tx_info->xdpf is also used to check whether a TX
descriptor's transmission has been completed (i.e. a completion for it
was polled).

An example scenario:
1. Mapping failed, tx_info->xdpf wasn't set to NULL
2. A VF reset occurred leading to IO resource destruction and
a call to ena_free_tx_bufs() function
3. Although the descriptor whose mapping failed was freed by the
transmission function, it still passes the check
if (!tx_info->skb)

(skb and xdp_frame are in a union)
4. The xdp_frame associated with the descriptor is freed twice

This patch returns the assignment of NULL to tx_info->xdpf to make the
cleaning function knows that the descriptor is already freed.

Fixes: 504fd6a5390c ("net: ena: fix DMA mapping function issues in XDP")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

[ Upstream commit 911a8c960110b03ed519ce43ea6c9990a0ee0ceb ]

When an XDP program is loaded the existing channels in the driver split
int

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

[ Upstream commit 911a8c960110b03ed519ce43ea6c9990a0ee0ceb ]

When an XDP program is loaded the existing channels in the driver split
into two halves:
- The first half of the channels contain RX and TX rings, these queues
are used for receiving traffic and sending packets originating from
kernel.
- The second half of the channels contain only a TX ring. These queues
are used for sending packets that were redirected using XDP_TX
or XDP_REDIRECT.

Referring to the queues in the second half of the channels as "xdp_ring"
can be confusing and may give the impression that ENA has the capability
to generate an additional special queue.

This patch ensures that the xdp_ring field is exclusively used to
describe the XDP TX queue that a specific RX queue needs to utilize when
forwarding packets with XDP TX and XDP REDIRECT, preserving the
integrity of the xdp_ring field in ena_ring.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-6-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

[ Upstream commit 39a044f4dcfee1c776603a6589b6fb98a9e222f2 ]

This change will enable the ability to use ena_xmit_common()
in fu

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

[ Upstream commit 39a044f4dcfee1c776603a6589b6fb98a9e222f2 ]

This change will enable the ability to use ena_xmit_common()
in functions that don't have a net_device pointer.
While it can be retrieved by dereferencing
ena_adapter (adapter->netdev), there's no reason to do it in
fast path code where this pointer is only needed for
debug prints.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-3-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Move XDP code to its new files

[ Upstream commit d000574d02870710c62751148cbfe22993222b98 ]

XDP system has a very large footprint in the driver's overall code.
makes the whole driver's co

net: ena: Move XDP code to its new files

[ Upstream commit d000574d02870710c62751148cbfe22993222b98 ]

XDP system has a very large footprint in the driver's overall code.
makes the whole driver's code much harder to read.

Moving XDP code to dedicated files.

This patch doesn't make any changes to the code itself and only
cut-pastes the code into ena_xdp.c and ena_xdp.h files so the change
is purely cosmetic.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-2-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NUL

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NULL with the justification that there's no need
to set tx_info->xdpf to NULL and tx_info->num_of_bufs to 0 in case
of a mapping error. Both values won't be used once the mapping function
returns an error, and their values would be overridden by the next
transmitted packet.

While both values do indeed get overridden in the next transmission
call, the value of tx_info->xdpf is also used to check whether a TX
descriptor's transmission has been completed (i.e. a completion for it
was polled).

An example scenario:
1. Mapping failed, tx_info->xdpf wasn't set to NULL
2. A VF reset occurred leading to IO resource destruction and
a call to ena_free_tx_bufs() function
3. Although the descriptor whose mapping failed was freed by the
transmission function, it still passes the check
if (!tx_info->skb)

(skb and xdp_frame are in a union)
4. The xdp_frame associated with the descriptor is freed twice

This patch returns the assignment of NULL to tx_info->xdpf to make the
cleaning function knows that the descriptor is already freed.

Fixes: 504fd6a5390c ("net: ena: fix DMA mapping function issues in XDP")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

[ Upstream commit 911a8c960110b03ed519ce43ea6c9990a0ee0ceb ]

When an XDP program is loaded the existing channels in the driver split
int

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

[ Upstream commit 911a8c960110b03ed519ce43ea6c9990a0ee0ceb ]

When an XDP program is loaded the existing channels in the driver split
into two halves:
- The first half of the channels contain RX and TX rings, these queues
are used for receiving traffic and sending packets originating from
kernel.
- The second half of the channels contain only a TX ring. These queues
are used for sending packets that were redirected using XDP_TX
or XDP_REDIRECT.

Referring to the queues in the second half of the channels as "xdp_ring"
can be confusing and may give the impression that ENA has the capability
to generate an additional special queue.

This patch ensures that the xdp_ring field is exclusively used to
describe the XDP TX queue that a specific RX queue needs to utilize when
forwarding packets with XDP TX and XDP REDIRECT, preserving the
integrity of the xdp_ring field in ena_ring.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-6-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

[ Upstream commit 39a044f4dcfee1c776603a6589b6fb98a9e222f2 ]

This change will enable the ability to use ena_xmit_common()
in fu

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

[ Upstream commit 39a044f4dcfee1c776603a6589b6fb98a9e222f2 ]

This change will enable the ability to use ena_xmit_common()
in functions that don't have a net_device pointer.
While it can be retrieved by dereferencing
ena_adapter (adapter->netdev), there's no reason to do it in
fast path code where this pointer is only needed for
debug prints.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-3-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Move XDP code to its new files

[ Upstream commit d000574d02870710c62751148cbfe22993222b98 ]

XDP system has a very large footprint in the driver's overall code.
makes the whole driver's co

net: ena: Move XDP code to its new files

[ Upstream commit d000574d02870710c62751148cbfe22993222b98 ]

XDP system has a very large footprint in the driver's overall code.
makes the whole driver's code much harder to read.

Moving XDP code to dedicated files.

This patch doesn't make any changes to the code itself and only
cut-pastes the code into ena_xdp.c and ena_xdp.h files so the change
is purely cosmetic.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-2-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NUL

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NULL with the justification that there's no need
to set tx_info->xdpf to NULL and tx_info->num_of_bufs to 0 in case
of a mapping error. Both values won't be used once the mapping function
returns an error, and their values would be overridden by the next
transmitted packet.

While both values do indeed get overridden in the next transmission
call, the value of tx_info->xdpf is also used to check whether a TX
descriptor's transmission has been completed (i.e. a completion for it
was polled).

An example scenario:
1. Mapping failed, tx_info->xdpf wasn't set to NULL
2. A VF reset occurred leading to IO resource destruction and
a call to ena_free_tx_bufs() function
3. Although the descriptor whose mapping failed was freed by the
transmission function, it still passes the check
if (!tx_info->skb)

(skb and xdp_frame are in a union)
4. The xdp_frame associated with the descriptor is freed twice

This patch returns the assignment of NULL to tx_info->xdpf to make the
cleaning function knows that the descriptor is already freed.

Fixes: 504fd6a5390c ("net: ena: fix DMA mapping function issues in XDP")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

[ Upstream commit 911a8c960110b03ed519ce43ea6c9990a0ee0ceb ]

When an XDP program is loaded the existing channels in the driver split
int

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

[ Upstream commit 911a8c960110b03ed519ce43ea6c9990a0ee0ceb ]

When an XDP program is loaded the existing channels in the driver split
into two halves:
- The first half of the channels contain RX and TX rings, these queues
are used for receiving traffic and sending packets originating from
kernel.
- The second half of the channels contain only a TX ring. These queues
are used for sending packets that were redirected using XDP_TX
or XDP_REDIRECT.

Referring to the queues in the second half of the channels as "xdp_ring"
can be confusing and may give the impression that ENA has the capability
to generate an additional special queue.

This patch ensures that the xdp_ring field is exclusively used to
describe the XDP TX queue that a specific RX queue needs to utilize when
forwarding packets with XDP TX and XDP REDIRECT, preserving the
integrity of the xdp_ring field in ena_ring.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-6-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

[ Upstream commit 39a044f4dcfee1c776603a6589b6fb98a9e222f2 ]

This change will enable the ability to use ena_xmit_common()
in fu

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

[ Upstream commit 39a044f4dcfee1c776603a6589b6fb98a9e222f2 ]

This change will enable the ability to use ena_xmit_common()
in functions that don't have a net_device pointer.
While it can be retrieved by dereferencing
ena_adapter (adapter->netdev), there's no reason to do it in
fast path code where this pointer is only needed for
debug prints.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-3-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Move XDP code to its new files

[ Upstream commit d000574d02870710c62751148cbfe22993222b98 ]

XDP system has a very large footprint in the driver's overall code.
makes the whole driver's co

net: ena: Move XDP code to its new files

[ Upstream commit d000574d02870710c62751148cbfe22993222b98 ]

XDP system has a very large footprint in the driver's overall code.
makes the whole driver's code much harder to read.

Moving XDP code to dedicated files.

This patch doesn't make any changes to the code itself and only
cut-pastes the code into ena_xdp.c and ena_xdp.h files so the change
is purely cosmetic.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-2-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NUL

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NULL with the justification that there's no need
to set tx_info->xdpf to NULL and tx_info->num_of_bufs to 0 in case
of a mapping error. Both values won't be used once the mapping function
returns an error, and their values would be overridden by the next
transmitted packet.

While both values do indeed get overridden in the next transmission
call, the value of tx_info->xdpf is also used to check whether a TX
descriptor's transmission has been completed (i.e. a completion for it
was polled).

An example scenario:
1. Mapping failed, tx_info->xdpf wasn't set to NULL
2. A VF reset occurred leading to IO resource destruction and
a call to ena_free_tx_bufs() function
3. Although the descriptor whose mapping failed was freed by the
transmission function, it still passes the check
if (!tx_info->skb)

(skb and xdp_frame are in a union)
4. The xdp_frame associated with the descriptor is freed twice

This patch returns the assignment of NULL to tx_info->xdpf to make the
cleaning function knows that the descriptor is already freed.

Fixes: 504fd6a5390c ("net: ena: fix DMA mapping function issues in XDP")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

[ Upstream commit 911a8c960110b03ed519ce43ea6c9990a0ee0ceb ]

When an XDP program is loaded the existing channels in the driver split
int

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

[ Upstream commit 911a8c960110b03ed519ce43ea6c9990a0ee0ceb ]

When an XDP program is loaded the existing channels in the driver split
into two halves:
- The first half of the channels contain RX and TX rings, these queues
are used for receiving traffic and sending packets originating from
kernel.
- The second half of the channels contain only a TX ring. These queues
are used for sending packets that were redirected using XDP_TX
or XDP_REDIRECT.

Referring to the queues in the second half of the channels as "xdp_ring"
can be confusing and may give the impression that ENA has the capability
to generate an additional special queue.

This patch ensures that the xdp_ring field is exclusively used to
describe the XDP TX queue that a specific RX queue needs to utilize when
forwarding packets with XDP TX and XDP REDIRECT, preserving the
integrity of the xdp_ring field in ena_ring.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-6-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

[ Upstream commit 39a044f4dcfee1c776603a6589b6fb98a9e222f2 ]

This change will enable the ability to use ena_xmit_common()
in fu

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

[ Upstream commit 39a044f4dcfee1c776603a6589b6fb98a9e222f2 ]

This change will enable the ability to use ena_xmit_common()
in functions that don't have a net_device pointer.
While it can be retrieved by dereferencing
ena_adapter (adapter->netdev), there's no reason to do it in
fast path code where this pointer is only needed for
debug prints.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-3-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Move XDP code to its new files

[ Upstream commit d000574d02870710c62751148cbfe22993222b98 ]

XDP system has a very large footprint in the driver's overall code.
makes the whole driver's co

net: ena: Move XDP code to its new files

[ Upstream commit d000574d02870710c62751148cbfe22993222b98 ]

XDP system has a very large footprint in the driver's overall code.
makes the whole driver's code much harder to read.

Moving XDP code to dedicated files.

This patch doesn't make any changes to the code itself and only
cut-pastes the code into ena_xdp.c and ena_xdp.h files so the change
is purely cosmetic.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Link: https://lore.kernel.org/r/20240101190855.18739-2-darinzon@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 36a1ca01f045 ("net: ena: Set tx_info->xdpf value to NULL")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NUL

net: ena: Set tx_info->xdpf value to NULL

[ Upstream commit 36a1ca01f0452f2549420e7279c2588729bd94df ]

The patch mentioned in the `Fixes` tag removed the explicit assignment
of tx_info->xdpf to NULL with the justification that there's no need
to set tx_info->xdpf to NULL and tx_info->num_of_bufs to 0 in case
of a mapping error. Both values won't be used once the mapping function
returns an error, and their values would be overridden by the next
transmitted packet.

While both values do indeed get overridden in the next transmission
call, the value of tx_info->xdpf is also used to check whether a TX
descriptor's transmission has been completed (i.e. a completion for it
was polled).

An example scenario:
1. Mapping failed, tx_info->xdpf wasn't set to NULL
2. A VF reset occurred leading to IO resource destruction and
a call to ena_free_tx_bufs() function
3. Although the descriptor whose mapping failed was freed by the
transmission function, it still passes the check
if (!tx_info->skb)

(skb and xdp_frame are in a union)
4. The xdp_frame associated with the descriptor is freed twice

This patch returns the assignment of NULL to tx_info->xdpf to make the
cleaning function knows that the descriptor is already freed.

Fixes: 504fd6a5390c ("net: ena: fix DMA mapping function issues in XDP")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...