linux/ena update ENA linux driver to version 2.1.4

**New Features**
* Add support for the RX offset feature - where the device writes data
  with an offset from the beginning of an RX buffer.

Signed-off-by: Sameeh Jubran <[email protected]>
Signed-off-by: Arthur Kiyanovski <[email protected]>

Author: akiyano

kernel/linux/common/ena_com/ena_admin_defs.h

@@ -821,7 +821,8 @@ struct ena_admin_host_info {
 
 	u16 reserved;
 
-	/* 1:0 : reserved
+	/* 0 : reserved
+	 * 1 : rx_offset
 	 * 2 : interrupt_moderation
 	 * 31:3 : reserved
 	 */
@@ -1137,6 +1138,8 @@ struct ena_admin_ena_mmio_req_read_less_resp {
 #define ENA_ADMIN_HOST_INFO_DEVICE_MASK                     GENMASK(7, 3)
 #define ENA_ADMIN_HOST_INFO_BUS_SHIFT                       8
 #define ENA_ADMIN_HOST_INFO_BUS_MASK                        GENMASK(15, 8)
+#define ENA_ADMIN_HOST_INFO_RX_OFFSET_SHIFT                 1
+#define ENA_ADMIN_HOST_INFO_RX_OFFSET_MASK                  BIT(1)
 #define ENA_ADMIN_HOST_INFO_INTERRUPT_MODERATION_SHIFT      2
 #define ENA_ADMIN_HOST_INFO_INTERRUPT_MODERATION_MASK       BIT(2)
 

kernel/linux/common/ena_com/ena_eth_com.c

@@ -521,7 +521,7 @@ int ena_com_rx_pkt(struct ena_com_io_cq *io_cq,
 	struct ena_eth_io_rx_cdesc_base *cdesc = NULL;
 	u16 cdesc_idx = 0;
 	u16 nb_hw_desc;
-	u16 i;
+	u16 i = 0;
 
 	WARN(io_cq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX, "wrong Q type");
 
@@ -540,13 +540,14 @@ int ena_com_rx_pkt(struct ena_com_io_cq *io_cq,
 		return -ENOSPC;
 	}
 
-	for (i = 0; i < nb_hw_desc; i++) {
-		cdesc = ena_com_rx_cdesc_idx_to_ptr(io_cq, cdesc_idx + i);
+	cdesc = ena_com_rx_cdesc_idx_to_ptr(io_cq, cdesc_idx);
+	ena_rx_ctx->pkt_offset = cdesc->offset;
 
+	do {
 		ena_buf->len = cdesc->length;
 		ena_buf->req_id = cdesc->req_id;
 		ena_buf++;
-	}
+	} while ((++i < nb_hw_desc) && (cdesc = ena_com_rx_cdesc_idx_to_ptr(io_cq, cdesc_idx + i)));
 
 	/* Update SQ head ptr */
 	io_sq->next_to_comp += nb_hw_desc;

kernel/linux/common/ena_com/ena_eth_com.h

@@ -73,6 +73,7 @@ struct ena_com_rx_ctx {
 	u32 hash;
 	u16 descs;
 	int max_bufs;
+	u8 pkt_offset;
 };
 
 int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,

kernel/linux/common/ena_com/ena_eth_io_defs.h

@@ -264,7 +264,9 @@ struct ena_eth_io_rx_cdesc_base {
 
 	u16 sub_qid;
 
-	u16 reserved;
+	u8 offset;
+
+	u8 reserved;
 };
 
 /* 8-word format */

kernel/linux/ena/RELEASENOTES.md

@@ -39,6 +39,11 @@ The driver was verified on the following distributions:
 SUSE Linux Enterprise Server 12 SP2
 SUSE Linux Enterprise Server 12 SP3
 
+## r2.1.4 release notes
+**New Features**
+* Add support for the RX offset feature - where the device writes data
+  with an offset from the beginning of an RX buffer.
+
 ## r2.1.3 release notes
 **New Features**
 * Replace old adaptive interrupt moderation algorithm with the DIM

kernel/linux/ena/ena_netdev.c

@@ -891,7 +891,8 @@ static struct sk_buff *ena_alloc_skb(struct ena_ring *rx_ring, bool frags)
 static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
 				  struct ena_com_rx_buf_info *ena_bufs,
 				  u32 descs,
-				  u16 *next_to_clean)
+				  u16 *next_to_clean,
+				  u8 offset)
 {
 	struct sk_buff *skb;
 	struct ena_rx_buffer *rx_info;
@@ -911,6 +912,7 @@ static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
 	}
 
 	rx_info = &rx_ring->rx_buffer_info[req_id];
+	rx_info->page_offset = offset;
 
 	if (unlikely(!rx_info->page)) {
 		netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
@@ -974,6 +976,8 @@ static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
 
 		skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_info->page,
 				rx_info->page_offset, len, ENA_PAGE_SIZE);
+		/* The offset is non zero only for the first buffer */
+		rx_info->page_offset = 0;
 
 		netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 			  "rx skb updated. len %d. data_len %d\n",
@@ -1141,6 +1145,7 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
 		ena_rx_ctx.ena_bufs = rx_ring->ena_bufs;
 		ena_rx_ctx.max_bufs = rx_ring->sgl_size;
 		ena_rx_ctx.descs = 0;
+		ena_rx_ctx.pkt_offset = 0;
 		rc = ena_com_rx_pkt(rx_ring->ena_com_io_cq,
 				    rx_ring->ena_com_io_sq,
 				    &ena_rx_ctx);
@@ -1157,7 +1162,7 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
 
 		/* allocate skb and fill it */
 		skb = ena_rx_skb(rx_ring, rx_ring->ena_bufs, ena_rx_ctx.descs,
-				 &next_to_clean);
+				 &next_to_clean, ena_rx_ctx.pkt_offset);
 
 		/* exit if we failed to retrieve a buffer */
 		if (unlikely(!skb)) {
@@ -2664,6 +2669,7 @@ static void ena_config_host_info(struct ena_com_dev *ena_dev, struct pci_dev *pd
 	host_info->num_cpus = num_online_cpus();
 
 	host_info->driver_supported_features =
+		ENA_ADMIN_HOST_INFO_RX_OFFSET_MASK |
 		ENA_ADMIN_HOST_INFO_INTERRUPT_MODERATION_MASK;
 
 	rc = ena_com_set_host_attributes(ena_dev);

kernel/linux/ena/ena_netdev.h

@@ -52,7 +52,7 @@
 
 #define DRV_MODULE_VER_MAJOR	2
 #define DRV_MODULE_VER_MINOR	1
-#define DRV_MODULE_VER_SUBMINOR 3
+#define DRV_MODULE_VER_SUBMINOR 4
 
 #define DRV_MODULE_NAME		"ena"
 #ifndef DRV_MODULE_VERSION

kernel/linux/rpm/Makefile

@@ -3,7 +3,7 @@
 # Author: Cristian Gafton <[email protected]>
 
 NAME	= ena
-VERSION	= 2.1.3
+VERSION	= 2.1.4
 
 TOPDIR	:= $(shell git rev-parse --show-toplevel)
 

kernel/linux/rpm/README-rpm.txt

@@ -32,7 +32,7 @@ Once the pre-requisites have been installed, you can simply issue a
 "make" in this directory to build the kmod src.rpm package:
 
 bash$ make
-cd .. && git archive --format=tar --prefix=ena-2.1.3/ -o rpm/ena-2.1.3.tar ena_linux_2.1.3
+cd .. && git archive --format=tar --prefix=ena-2.1.4/ -o rpm/ena-2.1.4.tar ena_linux_2.1.4
 rpmbuild -bs \
             --define '_topdir %(pwd)' --define '_ntopdir %(pwd)' \
             --define '_builddir  %{_ntopdir}' \
@@ -41,7 +41,7 @@ rpmbuild -bs \
             --define '_rpmdir    %{_ntopdir}' \
             --define '_srcrpmdir %{_ntopdir}' \
         ena.spec
-Wrote: /home/ec2-user/amzn-drivers/rpm/ena-2.1.3-1.el7.3.src.rpm
+Wrote: /home/ec2-user/amzn-drivers/rpm/ena-2.1.4-1.el7.3.src.rpm
 bash$ _
 
 
@@ -50,16 +50,16 @@ COMPILING AND INSTALLING
 Once the src.rpm has been created, you can build binary packages for
 the installed kernel-devel and kernel-headers environments:
 
-bash$ rpmbuild --rebuild ena-2.1.3-1.el7.3.src.rpm
+bash$ rpmbuild --rebuild ena-2.1.4-1.el7.3.src.rpm
 [....]
-Wrote: /home/ec2-user/rpmbuild/RPMS/x86_64/kmod-ena-2.1.3-1.el7.3.x86_64.rpm
-Wrote: /home/ec2-user/rpmbuild/RPMS/x86_64/ena-debuginfo-2.1.3-1.el7.3.x86_64.rpm
+Wrote: /home/ec2-user/rpmbuild/RPMS/x86_64/kmod-ena-2.1.4-1.el7.3.x86_64.rpm
+Wrote: /home/ec2-user/rpmbuild/RPMS/x86_64/ena-debuginfo-2.1.4-1.el7.3.x86_64.rpm
 [...]
 bash$ _
 
 Now you should be able to install/deploy the resulting binary rpm
 packages using your preferred rpm install too. For example, using yum:
 
 bash$ sudo yum -y localinstall
-/home/ec2-user/rpmbuild/RPMS/x86_64/kmod-ena-2.1.3-1.el7.3.x86_64.rpm
+/home/ec2-user/rpmbuild/RPMS/x86_64/kmod-ena-2.1.4-1.el7.3.x86_64.rpm
 

kernel/linux/rpm/ena.spec

@@ -1,5 +1,5 @@
 %define kmod_name		ena
-%define kmod_driver_version	2.1.3
+%define kmod_driver_version	2.1.4
 %define kmod_rpm_release	1
 %define kmod_git_hash		3ac3e0bf079b2c0468f759f2213541e214a6dd77
 %define kmod_kbuild_dir		kernel/linux/ena
@@ -22,7 +22,7 @@ Source7:	preamble
 
 Name:		%{kmod_name}
 Version:	%{kmod_driver_version}
-Release:	%{kmod_rpm_release}%{?dist}.14
+Release:	%{kmod_rpm_release}%{?dist}.15
 Summary:	%{kmod_name} kernel module
 
 Group:		System/Kernel
@@ -99,6 +99,9 @@ install -m 644 -D source/%{kmod_kbuild_dir}/RELEASENOTES.md $RPM_BUILD_ROOT/usr/
 rm -rf $RPM_BUILD_ROOT
 
 %changelog
+* Thu Dec 12 2019 Arthur Kiyanovski [email protected] - 2.1.4-1.15
+- Update ENA driver to version 2.1.4
+
 * Wed Oct 23 2019 Arthur Kiyanovski [email protected] - 2.1.3-1.14
 - Update ENA driver to version 2.1.3