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Message-Id: <1303766647-30156-11-git-send-email-dykmanj@linux.vnet.ibm.com>
Date: Mon, 25 Apr 2011 17:23:50 -0400
From: dykmanj@...ux.vnet.ibm.com
To: netdev@...r.kernel.org
Cc: Jim Dykman <dykmanj@...ux.vnet.ibm.com>,
Piyush Chaudhary <piyushc@...ux.vnet.ibm.com>,
Fu-Chung Chang <fcchang@...ux.vnet.ibm.com>,
" William S. Cadden" <wscadden@...ux.vnet.ibm.com>,
" Wen C. Chen" <winstonc@...ux.vnet.ibm.com>,
Scot Sakolish <sakolish@...ux.vnet.ibm.com>,
Jian Xiao <jian@...ux.vnet.ibm.com>,
" Carol L. Soto" <clsoto@...ux.vnet.ibm.com>,
" Sarah J. Sheppard" <sjsheppa@...ux.vnet.ibm.com>
Subject: [PATCH v4 10/27] HFI: HFIDD_REQ_OPEN_WINDOW request
From: Jim Dykman <dykmanj@...ux.vnet.ibm.com>
Set up protocol access to an HFI window.
Signed-off-by: Piyush Chaudhary <piyushc@...ux.vnet.ibm.com>
Signed-off-by: Jim Dykman <dykmanj@...ux.vnet.ibm.com>
Signed-off-by: Fu-Chung Chang <fcchang@...ux.vnet.ibm.com>
Signed-off-by: William S. Cadden <wscadden@...ux.vnet.ibm.com>
Signed-off-by: Wen C. Chen <winstonc@...ux.vnet.ibm.com>
Signed-off-by: Scot Sakolish <sakolish@...ux.vnet.ibm.com>
Signed-off-by: Jian Xiao <jian@...ux.vnet.ibm.com>
Signed-off-by: Carol L. Soto <clsoto@...ux.vnet.ibm.com>
Signed-off-by: Sarah J. Sheppard <sjsheppa@...ux.vnet.ibm.com>
---
drivers/net/hfi/core/Makefile | 1 +
drivers/net/hfi/core/hfidd_init.c | 14 +++++++
drivers/net/hfi/core/hfidd_proto.h | 3 +
drivers/net/hfi/core/hfidd_window.c | 70 +++++++++++++++++++++++++++++++++++
include/linux/hfi/hfidd_client.h | 22 +++++++++++
include/linux/hfi/hfidd_internal.h | 26 +++++++++++++
include/linux/hfi/hfidd_requests.h | 1 +
7 files changed, 137 insertions(+), 0 deletions(-)
create mode 100644 drivers/net/hfi/core/hfidd_window.c
diff --git a/drivers/net/hfi/core/Makefile b/drivers/net/hfi/core/Makefile
index 4e6cbd6..0224a57 100644
--- a/drivers/net/hfi/core/Makefile
+++ b/drivers/net/hfi/core/Makefile
@@ -2,6 +2,7 @@
# Makefile for the HFI device driver for IBM eServer System p
#
hfi_core-objs:= hfidd_adpt.o \
+ hfidd_window.o \
hfidd_init.o \
hfidd_hcalls.o
obj-$(CONFIG_HFI) += hfi_core.o
diff --git a/drivers/net/hfi/core/hfidd_init.c b/drivers/net/hfi/core/hfidd_init.c
index df79ae9..49099ec 100644
--- a/drivers/net/hfi/core/hfidd_init.c
+++ b/drivers/net/hfi/core/hfidd_init.c
@@ -129,6 +129,20 @@ static ssize_t hfidd_cmd_write(struct file *filep, const char __user *buf,
}
switch (cmd.req) {
+ case HFIDD_REQ_OPEN_WINDOW:
+ if (cmd.req_len != sizeof(struct hfi_client_info)) {
+ dev_printk(KERN_ERR, p_acs->hfidd_dev,
+ "hfidd_cmd_write: hdr.reqlen 0x%x expected "
+ "0x%lx for cmd req 0x%x\n",
+ cmd.req_len,
+ sizeof(struct hfi_client_info), cmd.req);
+ return -EINVAL;
+ }
+ rc = hfidd_open_window_func(p_acs, is_userspace,
+ (struct hfi_client_info *) buf,
+ (struct hfi_client_info *) cmd.result.use.kptr);
+ break;
+
case HFIDD_REQ_QUERY_DD_INFO:
if (cmd.req_len != sizeof(struct hfi_query_dd_info)) {
dev_printk(KERN_ERR, p_acs->hfidd_dev,
diff --git a/drivers/net/hfi/core/hfidd_proto.h b/drivers/net/hfi/core/hfidd_proto.h
index c61387e..e7f2901 100644
--- a/drivers/net/hfi/core/hfidd_proto.h
+++ b/drivers/net/hfi/core/hfidd_proto.h
@@ -39,6 +39,9 @@ int hfidd_alloc_windows(struct hfidd_acs *p_acs);
void hfidd_free_windows(struct hfidd_acs *p_acs);
int hfidd_init_adapter(struct hfidd_acs *p_acs, void *uiop);
int hfidd_age_hcall(u64 time_start);
+int hfidd_open_window_func(struct hfidd_acs *p_acs, unsigned int is_userspace,
+ struct hfi_client_info *user_p,
+ struct hfi_client_info *out_p);
int hfidd_get_phyp_page(struct hfidd_acs *p_acs, caddr_t *page,
caddr_t *laddr, int size);
void hfidd_release_phyp_page(caddr_t page, int size);
diff --git a/drivers/net/hfi/core/hfidd_window.c b/drivers/net/hfi/core/hfidd_window.c
new file mode 100644
index 0000000..f16caf7
--- /dev/null
+++ b/drivers/net/hfi/core/hfidd_window.c
@@ -0,0 +1,70 @@
+/*
+ * hfidd_window.c
+ *
+ * HFI device driver for IBM System p
+ *
+ * Authors:
+ * Fu-Chung Chang <fcchang@...ux.vnet.ibm.com>
+ * William S. Cadden <wscadden@...ux.vnet.ibm.com>
+ * Wen C. Chen <winstonc@...ux.vnet.ibm.com>
+ * Scot Sakolish <sakolish@...ux.vnet.ibm.com>
+ * Jian Xiao <jian@...ux.vnet.ibm.com>
+ * Carol L. Soto <clsoto@...ux.vnet.ibm.com>
+ * Sarah J. Sheppard <sjsheppa@...ux.vnet.ibm.com>
+ *
+ * (C) Copyright IBM Corp. 2010
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/hfi/hfidd_internal.h>
+#include <linux/hfi/hfidd_hcalls.h>
+#include "hfidd_proto.h"
+#include <linux/hfi/hfidd_requests.h>
+
+/*
+ * Allows an user/kernel window to send/receive network traffic thru HFI
+ * adapter. This function will allocate the system resources needed to open
+ * a window. If any problem detected, then the request will fail. This function
+ * is called directly by kernel users and by a write system call by userspace.
+ */
+int hfidd_open_window_func(struct hfidd_acs *p_acs, unsigned int is_userspace,
+ struct hfi_client_info *user_p,
+ struct hfi_client_info *out_p)
+{
+ int rc = 0;
+ struct hfi_client_info *local_p = NULL;
+
+ /* Allocate local data structure */
+ local_p = kmalloc(sizeof(struct hfi_client_info), GFP_KERNEL);
+ if (local_p == NULL) {
+ dev_printk(KERN_ERR, p_acs->hfidd_dev,
+ "open_window_func: kmalloc local_p failed\n");
+ return -ENOMEM;
+ }
+
+ /* Copy into local from user */
+ rc = hfi_copy_from_user((void *)local_p, (void *)user_p,
+ is_userspace, sizeof(struct hfi_client_info));
+ if (rc) {
+ dev_printk(KERN_ERR, p_acs->hfidd_dev,
+ "open_window_func: hfi_copy_from_user failed\n");
+ }
+
+ kfree(local_p);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(hfidd_open_window_func);
diff --git a/include/linux/hfi/hfidd_client.h b/include/linux/hfi/hfidd_client.h
index c3c8fef..7e4c1a7 100644
--- a/include/linux/hfi/hfidd_client.h
+++ b/include/linux/hfi/hfidd_client.h
@@ -69,6 +69,28 @@ struct fifo_info {
unsigned long long size; /* bytes */
};
+/*
+ * HFIDD_REQ_OPEN_WINDOW: Window Open
+ * For reserved windows
+ * The job scheduler provides the application with window number and
+ * jobid, which need to be passed in/will be checked on the window open.
+ * Immediate send slots were also reserved by the job scheduler, and the
+ * DD returns the count. The application has the option of setting
+ * protection keys by task or by jobid. Protection key is passed in.
+ * For Dynamic windows
+ * The DD will select a free dynamic window and return its window number.
+ * The jobid will be assigned by the DD (upper bits set to select a
+ * reserved range of jobids, lower bits come from userid). The
+ * protection key flag is always by task. The protection key is passed in.
+ * For Kernel/IP windows
+ * The DD will select a free dynamic window and return its window number.
+ * The jobid is passed in. The jobid is used for the protection key.
+ *
+ * Finished vectors:
+ * sfifo_finishvec and imm_finishvec must reside in an extra page (last
+ * page) in the sfifo memory range, provided by the user.
+ */
+
#define HFIDD_IP_WIN 1 /* IP windows get broadcasts forwarded
to them... */
#define HFIDD_KERNEL_WIN 2 /* ... other kernel windows do not */
diff --git a/include/linux/hfi/hfidd_internal.h b/include/linux/hfi/hfidd_internal.h
index 233c232..c2b4591 100644
--- a/include/linux/hfi/hfidd_internal.h
+++ b/include/linux/hfi/hfidd_internal.h
@@ -141,4 +141,30 @@ struct hfidd_global {
struct hfidd_acs *p_acs[MAX_HFIS];
};
+static inline int hfi_copy_to_user(void *user_p, void *local_p,
+ unsigned int is_userspace, unsigned int size)
+{
+ int rc = 0;
+
+ if (is_userspace)
+ rc = copy_to_user(user_p, local_p, size);
+ else
+ memcpy(user_p, local_p, size);
+
+ return rc;
+}
+
+static inline int hfi_copy_from_user(void *local_p, void *user_p,
+ unsigned int is_userspace, unsigned int size)
+{
+ int rc = 0;
+
+ if (is_userspace)
+ rc = copy_from_user(local_p, user_p, size);
+ else
+ memcpy(local_p, user_p, size);
+
+ return rc;
+}
+
#endif
diff --git a/include/linux/hfi/hfidd_requests.h b/include/linux/hfi/hfidd_requests.h
index b6e255f..4f1c74d 100644
--- a/include/linux/hfi/hfidd_requests.h
+++ b/include/linux/hfi/hfidd_requests.h
@@ -33,6 +33,7 @@
#ifndef _HFIDD_REQUESTS_H_
#define _HFIDD_REQUESTS_H_
+#define HFIDD_REQ_OPEN_WINDOW 0x00000a01
#define HFIDD_REQ_QUERY_DD_INFO 0x00001004
#endif /* _HFIDD_REQUESTS_H_ */
--
1.7.3.5
--
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