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Date: Thu, 04 Feb 2010 17:54:43 +0200
From: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
To: Roland Dreier <rdreier@...co.com>
CC: general@...ts.openfabrics.org, netdev@...r.kernel.org,
liranl@...lanox.co.il, tziporet@...lanox.co.il
Subject: [PATCH 03/23 v3] mlx4_core: add WRITE_MTT support
Used by vfs to modify mtts, since they cannot access in-memory mtts directly.
Signed-off-by: Liran Liss <liranl@...lanox.co.il>
Signed-off-by: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
---
drivers/net/mlx4/cmd.c | 10 +++++-
drivers/net/mlx4/mlx4.h | 5 +++
drivers/net/mlx4/mr.c | 67 ++++++++++++++++++++++++++++++++++++++++++----
3 files changed, 74 insertions(+), 8 deletions(-)
diff --git a/drivers/net/mlx4/cmd.c b/drivers/net/mlx4/cmd.c
index 6c3d25c..9e85330 100644
--- a/drivers/net/mlx4/cmd.c
+++ b/drivers/net/mlx4/cmd.c
@@ -36,8 +36,6 @@
#include <linux/pci.h>
#include <linux/errno.h>
-#include <linux/mlx4/cmd.h>
-
#include <asm/io.h>
#include "mlx4.h"
@@ -497,6 +495,14 @@ static struct mlx4_cmd_info {
.wrapper = NULL
},
{
+ .opcode = MLX4_CMD_WRITE_MTT,
+ .has_inbox = true,
+ .has_outbox = false,
+ .out_is_imm = false,
+ .verify = NULL, /* need verifier */
+ .wrapper = mlx4_WRITE_MTT_wrapper
+ },
+ {
.opcode = MLX4_CMD_SYNC_TPT,
.has_inbox = true,
.has_outbox = false,
diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h
index 92d0682..18ac62d 100644
--- a/drivers/net/mlx4/mlx4.h
+++ b/drivers/net/mlx4/mlx4.h
@@ -45,6 +45,7 @@
#include <linux/mlx4/device.h>
#include <linux/mlx4/driver.h>
#include <linux/mlx4/doorbell.h>
+#include <linux/mlx4/cmd.h>
#define DRV_NAME "mlx4_core"
#define PFX DRV_NAME ": "
@@ -419,6 +420,10 @@ void mlx4_cleanup_qp_table(struct mlx4_dev *dev);
void mlx4_cleanup_srq_table(struct mlx4_dev *dev);
void mlx4_cleanup_mcg_table(struct mlx4_dev *dev);
+int mlx4_WRITE_MTT_wrapper(struct mlx4_dev *dev, int slave, struct mlx4_vhcr *vhcr,
+ struct mlx4_cmd_mailbox *inbox,
+ struct mlx4_cmd_mailbox *outbox);
+
void mlx4_start_catas_poll(struct mlx4_dev *dev);
void mlx4_stop_catas_poll(struct mlx4_dev *dev);
void mlx4_catas_init(void);
diff --git a/drivers/net/mlx4/mr.c b/drivers/net/mlx4/mr.c
index ca7ab8e..9e4ab0f 100644
--- a/drivers/net/mlx4/mr.c
+++ b/drivers/net/mlx4/mr.c
@@ -262,6 +262,35 @@ static int mlx4_HW2SW_MPT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox
!mailbox, MLX4_CMD_HW2SW_MPT, MLX4_CMD_TIME_CLASS_B);
}
+int mlx4_WRITE_MTT_wrapper(struct mlx4_dev *dev, int slave, struct mlx4_vhcr *vhcr,
+ struct mlx4_cmd_mailbox *inbox,
+ struct mlx4_cmd_mailbox *outbox)
+{
+ struct mlx4_mtt mtt;
+ u64 *page_list = inbox->buf;
+ int i;
+
+ /* Call the SW implementation of write_mtt:
+ * - Prepare a dummy mtt struct
+ * - Translate inbox contents to simple addresses in host endianess */
+ mtt.first_seg = 0;
+ mtt.order = 0;
+ mtt.page_shift = 0;
+ for (i = 0; i < vhcr->in_modifier; ++i)
+ page_list[i + 2] = be64_to_cpu(page_list[i + 2]) & ~1ULL;
+ vhcr->errno = mlx4_write_mtt(dev, &mtt, be64_to_cpu(page_list[0]),
+ vhcr->in_modifier,
+ page_list + 2);
+ return 0;
+}
+
+static int mlx4_WRITE_MTT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
+ int num_entries)
+{
+ return mlx4_cmd(dev, mailbox->dma, num_entries, 0, MLX4_CMD_WRITE_MTT,
+ MLX4_CMD_TIME_CLASS_A);
+}
+
int mlx4_mr_alloc(struct mlx4_dev *dev, u32 pd, u64 iova, u64 size, u32 access,
int npages, int page_shift, struct mlx4_mr *mr)
{
@@ -413,24 +442,50 @@ static int mlx4_write_mtt_chunk(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
int mlx4_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
int start_index, int npages, u64 *page_list)
{
+ struct mlx4_cmd_mailbox *mailbox = NULL;
int chunk;
- int err;
+ int err = 0;
+ __be64 *inbox = NULL;
+ int i;
if (mtt->order < 0)
return -EINVAL;
+ if (mlx4_is_slave(dev)) {
+ mailbox = mlx4_alloc_cmd_mailbox(dev);
+ if (IS_ERR(mailbox))
+ return PTR_ERR(mailbox);
+ inbox = mailbox->buf;
+ }
+
while (npages > 0) {
- chunk = min_t(int, PAGE_SIZE / sizeof(u64), npages);
- err = mlx4_write_mtt_chunk(dev, mtt, start_index, chunk, page_list);
+ if (mlx4_is_slave(dev)) {
+ int s = mtt->first_seg * dev->caps.mtts_per_seg + start_index;
+ chunk = min_t(int, MLX4_MAILBOX_SIZE / sizeof(u64) - dev->caps.mtts_per_seg, npages);
+ if (s / (PAGE_SIZE / sizeof (u64)) !=
+ (s + chunk - 1) / (PAGE_SIZE / sizeof (u64)))
+ chunk = PAGE_SIZE / sizeof (u64) - (s % (PAGE_SIZE / sizeof (u64)));
+
+ inbox[0] = cpu_to_be64(mtt->first_seg * dev->caps.mtts_per_seg + start_index);
+ inbox[1] = 0;
+ for (i = 0; i < chunk; ++i)
+ inbox[i + 2] = cpu_to_be64(page_list[i] | MLX4_MTT_FLAG_PRESENT);
+ err = mlx4_WRITE_MTT(dev, mailbox, chunk);
+ } else {
+ chunk = min_t(int, PAGE_SIZE / sizeof(u64), npages);
+ err = mlx4_write_mtt_chunk(dev, mtt, start_index, chunk, page_list);
+ }
if (err)
- return err;
+ goto out;
npages -= chunk;
start_index += chunk;
page_list += chunk;
}
-
- return 0;
+out:
+ if (mlx4_is_slave(dev))
+ mlx4_free_cmd_mailbox(dev, mailbox);
+ return err;
}
EXPORT_SYMBOL_GPL(mlx4_write_mtt);
--
1.6.1.3
--
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