diff options
Diffstat (limited to 'meta-egvirt/recipes-kernel/linux/linux-yocto/virtio-scmi/0005-firmware-arm_scmi-Add-xfer_init_buffers-transport-op.patch')
| -rw-r--r-- | meta-egvirt/recipes-kernel/linux/linux-yocto/virtio-scmi/0005-firmware-arm_scmi-Add-xfer_init_buffers-transport-op.patch | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/meta-egvirt/recipes-kernel/linux/linux-yocto/virtio-scmi/0005-firmware-arm_scmi-Add-xfer_init_buffers-transport-op.patch b/meta-egvirt/recipes-kernel/linux/linux-yocto/virtio-scmi/0005-firmware-arm_scmi-Add-xfer_init_buffers-transport-op.patch deleted file mode 100644 index e62e5c50..00000000 --- a/meta-egvirt/recipes-kernel/linux/linux-yocto/virtio-scmi/0005-firmware-arm_scmi-Add-xfer_init_buffers-transport-op.patch +++ /dev/null @@ -1,79 +0,0 @@ -From fddb9bcd706ed3bb262f4f37707616dd06c7a4cc Mon Sep 17 00:00:00 2001 -From: Igor Skalkin <igor.skalkin@opensynergy.com> -Date: Thu, 5 Nov 2020 22:21:11 +0100 -Subject: [PATCH] firmware: arm_scmi: Add xfer_init_buffers transport op - -The virtio transport in this patch series can be simplified by using the -scmi_xfer tx/rx buffers for data exchange with the virtio device, and -for saving the message state. But the virtio transport requires -prepending a transport-specific header. Also, for data exchange using -virtqueues, the tx and rx buffers should not overlap. - -After the previous patch, this is the second and final step to enable -the virtio transport to use the scmi_xfer buffers for data exchange. - -Add an optional op through which the transport can allocate the tx/rx -buffers along with room for the prepended transport-specific headers. - -Co-developed-by: Peter Hilber <peter.hilber@opensynergy.com> -Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com> -Signed-off-by: Igor Skalkin <igor.skalkin@opensynergy.com> -Signed-off-by: Vasyl Vavrychuk <vasyl.vavrychuk@opensynergy.com> ---- - drivers/firmware/arm_scmi/common.h | 3 +++ - drivers/firmware/arm_scmi/driver.c | 21 +++++++++++++++------ - 2 files changed, 18 insertions(+), 6 deletions(-) - -diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h -index c998ec29018e..ae5db602e45d 100644 ---- a/drivers/firmware/arm_scmi/common.h -+++ b/drivers/firmware/arm_scmi/common.h -@@ -208,6 +208,7 @@ struct scmi_chan_info { - * @get_max_msg: Optional callback to provide max_msg dynamically - * @max_msg: Maximum number of messages for the channel type (tx or rx) - * that can be pending simultaneously in the system -+ * @xfer_init_buffers: Callback to initialize buffers for scmi_xfer - * @send_message: Callback to send a message - * @mark_txdone: Callback to mark tx as done - * @fetch_response: Callback to fetch response -@@ -222,6 +223,8 @@ struct scmi_transport_ops { - int (*chan_free)(int id, void *p, void *data); - int (*get_max_msg)(bool tx, struct scmi_chan_info *base_cinfo, - int *max_msg); -+ int (*xfer_init_buffers)(struct scmi_chan_info *cinfo, -+ struct scmi_xfer *xfer, int max_msg_size); - int (*send_message)(struct scmi_chan_info *cinfo, - struct scmi_xfer *xfer); - void (*mark_txdone)(struct scmi_chan_info *cinfo, int ret); -diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c -index 5baa23789a49..27dd43dcff5b 100644 ---- a/drivers/firmware/arm_scmi/driver.c -+++ b/drivers/firmware/arm_scmi/driver.c -@@ -640,12 +640,21 @@ static int __scmi_xfer_info_init(struct scmi_info *sinfo, - - /* Pre-initialize the buffer pointer to pre-allocated buffers */ - for (i = 0, xfer = info->xfer_block; i < info->max_msg; i++, xfer++) { -- xfer->rx.buf = devm_kcalloc(dev, sizeof(u8), desc->max_msg_size, -- GFP_KERNEL); -- if (!xfer->rx.buf) -- return -ENOMEM; -- -- xfer->tx.buf = xfer->rx.buf; -+ if (desc->ops->xfer_init_buffers) { -+ int ret = desc->ops->xfer_init_buffers( -+ base_cinfo, xfer, desc->max_msg_size); -+ -+ if (ret) -+ return ret; -+ } else { -+ xfer->rx.buf = devm_kcalloc(dev, sizeof(u8), -+ desc->max_msg_size, -+ GFP_KERNEL); -+ if (!xfer->rx.buf) -+ return -ENOMEM; -+ -+ xfer->tx.buf = xfer->rx.buf; -+ } - init_completion(&xfer->done); - } - |