mlx4: Move the Mellanox driver

Moves the Mellanox driver into drivers/net/ethernet/mellanox/ and
make the necessary Kconfig and Makefile changes.

CC: Roland Dreier <roland@kernel.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 443 deletions

diff --git a/drivers/net/mlx4/cmd.c b/drivers/net/mlx4/cmd.c
deleted file mode 100644
index 23cee7b..0000000
--- a/drivers/net/mlx4/cmd.c
+++ /dev/null
@@ -1,443 +0,0 @@
-/*
- * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
- * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
- * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc.  All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/pci.h>
-#include <linux/errno.h>
-
-#include <linux/mlx4/cmd.h>
-
-#include <asm/io.h>
-
-#include "mlx4.h"
-
-#define CMD_POLL_TOKEN 0xffff
-
-enum {
-	/* command completed successfully: */
-	CMD_STAT_OK		= 0x00,
-	/* Internal error (such as a bus error) occurred while processing command: */
-	CMD_STAT_INTERNAL_ERR	= 0x01,
-	/* Operation/command not supported or opcode modifier not supported: */
-	CMD_STAT_BAD_OP		= 0x02,
-	/* Parameter not supported or parameter out of range: */
-	CMD_STAT_BAD_PARAM	= 0x03,
-	/* System not enabled or bad system state: */
-	CMD_STAT_BAD_SYS_STATE	= 0x04,
-	/* Attempt to access reserved or unallocaterd resource: */
-	CMD_STAT_BAD_RESOURCE	= 0x05,
-	/* Requested resource is currently executing a command, or is otherwise busy: */
-	CMD_STAT_RESOURCE_BUSY	= 0x06,
-	/* Required capability exceeds device limits: */
-	CMD_STAT_EXCEED_LIM	= 0x08,
-	/* Resource is not in the appropriate state or ownership: */
-	CMD_STAT_BAD_RES_STATE	= 0x09,
-	/* Index out of range: */
-	CMD_STAT_BAD_INDEX	= 0x0a,
-	/* FW image corrupted: */
-	CMD_STAT_BAD_NVMEM	= 0x0b,
-	/* Error in ICM mapping (e.g. not enough auxiliary ICM pages to execute command): */
-	CMD_STAT_ICM_ERROR	= 0x0c,
-	/* Attempt to modify a QP/EE which is not in the presumed state: */
-	CMD_STAT_BAD_QP_STATE   = 0x10,
-	/* Bad segment parameters (Address/Size): */
-	CMD_STAT_BAD_SEG_PARAM	= 0x20,
-	/* Memory Region has Memory Windows bound to: */
-	CMD_STAT_REG_BOUND	= 0x21,
-	/* HCA local attached memory not present: */
-	CMD_STAT_LAM_NOT_PRE	= 0x22,
-	/* Bad management packet (silently discarded): */
-	CMD_STAT_BAD_PKT	= 0x30,
-	/* More outstanding CQEs in CQ than new CQ size: */
-	CMD_STAT_BAD_SIZE	= 0x40,
-	/* Multi Function device support required: */
-	CMD_STAT_MULTI_FUNC_REQ	= 0x50,
-};
-
-enum {
-	HCR_IN_PARAM_OFFSET	= 0x00,
-	HCR_IN_MODIFIER_OFFSET	= 0x08,
-	HCR_OUT_PARAM_OFFSET	= 0x0c,
-	HCR_TOKEN_OFFSET	= 0x14,
-	HCR_STATUS_OFFSET	= 0x18,
-
-	HCR_OPMOD_SHIFT		= 12,
-	HCR_T_BIT		= 21,
-	HCR_E_BIT		= 22,
-	HCR_GO_BIT		= 23
-};
-
-enum {
-	GO_BIT_TIMEOUT_MSECS	= 10000
-};
-
-struct mlx4_cmd_context {
-	struct completion	done;
-	int			result;
-	int			next;
-	u64			out_param;
-	u16			token;
-};
-
-static int mlx4_status_to_errno(u8 status)
-{
-	static const int trans_table[] = {
-		[CMD_STAT_INTERNAL_ERR]	  = -EIO,
-		[CMD_STAT_BAD_OP]	  = -EPERM,
-		[CMD_STAT_BAD_PARAM]	  = -EINVAL,
-		[CMD_STAT_BAD_SYS_STATE]  = -ENXIO,
-		[CMD_STAT_BAD_RESOURCE]	  = -EBADF,
-		[CMD_STAT_RESOURCE_BUSY]  = -EBUSY,
-		[CMD_STAT_EXCEED_LIM]	  = -ENOMEM,
-		[CMD_STAT_BAD_RES_STATE]  = -EBADF,
-		[CMD_STAT_BAD_INDEX]	  = -EBADF,
-		[CMD_STAT_BAD_NVMEM]	  = -EFAULT,
-		[CMD_STAT_ICM_ERROR]	  = -ENFILE,
-		[CMD_STAT_BAD_QP_STATE]   = -EINVAL,
-		[CMD_STAT_BAD_SEG_PARAM]  = -EFAULT,
-		[CMD_STAT_REG_BOUND]	  = -EBUSY,
-		[CMD_STAT_LAM_NOT_PRE]	  = -EAGAIN,
-		[CMD_STAT_BAD_PKT]	  = -EINVAL,
-		[CMD_STAT_BAD_SIZE]	  = -ENOMEM,
-		[CMD_STAT_MULTI_FUNC_REQ] = -EACCES,
-	};
-
-	if (status >= ARRAY_SIZE(trans_table) ||
-	    (status != CMD_STAT_OK && trans_table[status] == 0))
-		return -EIO;
-
-	return trans_table[status];
-}
-
-static int cmd_pending(struct mlx4_dev *dev)
-{
-	u32 status = readl(mlx4_priv(dev)->cmd.hcr + HCR_STATUS_OFFSET);
-
-	return (status & swab32(1 << HCR_GO_BIT)) ||
-		(mlx4_priv(dev)->cmd.toggle ==
-		 !!(status & swab32(1 << HCR_T_BIT)));
-}
-
-static int mlx4_cmd_post(struct mlx4_dev *dev, u64 in_param, u64 out_param,
-			 u32 in_modifier, u8 op_modifier, u16 op, u16 token,
-			 int event)
-{
-	struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
-	u32 __iomem *hcr = cmd->hcr;
-	int ret = -EAGAIN;
-	unsigned long end;
-
-	mutex_lock(&cmd->hcr_mutex);
-
-	end = jiffies;
-	if (event)
-		end += msecs_to_jiffies(GO_BIT_TIMEOUT_MSECS);
-
-	while (cmd_pending(dev)) {
-		if (time_after_eq(jiffies, end))
-			goto out;
-		cond_resched();
-	}
-
-	/*
-	 * We use writel (instead of something like memcpy_toio)
-	 * because writes of less than 32 bits to the HCR don't work
-	 * (and some architectures such as ia64 implement memcpy_toio
-	 * in terms of writeb).
-	 */
-	__raw_writel((__force u32) cpu_to_be32(in_param >> 32),		  hcr + 0);
-	__raw_writel((__force u32) cpu_to_be32(in_param & 0xfffffffful),  hcr + 1);
-	__raw_writel((__force u32) cpu_to_be32(in_modifier),		  hcr + 2);
-	__raw_writel((__force u32) cpu_to_be32(out_param >> 32),	  hcr + 3);
-	__raw_writel((__force u32) cpu_to_be32(out_param & 0xfffffffful), hcr + 4);
-	__raw_writel((__force u32) cpu_to_be32(token << 16),		  hcr + 5);
-
-	/* __raw_writel may not order writes. */
-	wmb();
-
-	__raw_writel((__force u32) cpu_to_be32((1 << HCR_GO_BIT)		|
-					       (cmd->toggle << HCR_T_BIT)	|
-					       (event ? (1 << HCR_E_BIT) : 0)	|
-					       (op_modifier << HCR_OPMOD_SHIFT) |
-					       op),			  hcr + 6);
-
-	/*
-	 * Make sure that our HCR writes don't get mixed in with
-	 * writes from another CPU starting a FW command.
-	 */
-	mmiowb();
-
-	cmd->toggle = cmd->toggle ^ 1;
-
-	ret = 0;
-
-out:
-	mutex_unlock(&cmd->hcr_mutex);
-	return ret;
-}
-
-static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
-			 int out_is_imm, u32 in_modifier, u8 op_modifier,
-			 u16 op, unsigned long timeout)
-{
-	struct mlx4_priv *priv = mlx4_priv(dev);
-	void __iomem *hcr = priv->cmd.hcr;
-	int err = 0;
-	unsigned long end;
-
-	down(&priv->cmd.poll_sem);
-
-	err = mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
-			    in_modifier, op_modifier, op, CMD_POLL_TOKEN, 0);
-	if (err)
-		goto out;
-
-	end = msecs_to_jiffies(timeout) + jiffies;
-	while (cmd_pending(dev) && time_before(jiffies, end))
-		cond_resched();
-
-	if (cmd_pending(dev)) {
-		err = -ETIMEDOUT;
-		goto out;
-	}
-
-	if (out_is_imm)
-		*out_param =
-			(u64) be32_to_cpu((__force __be32)
-					  __raw_readl(hcr + HCR_OUT_PARAM_OFFSET)) << 32 |
-			(u64) be32_to_cpu((__force __be32)
-					  __raw_readl(hcr + HCR_OUT_PARAM_OFFSET + 4));
-
-	err = mlx4_status_to_errno(be32_to_cpu((__force __be32)
-					       __raw_readl(hcr + HCR_STATUS_OFFSET)) >> 24);
-
-out:
-	up(&priv->cmd.poll_sem);
-	return err;
-}
-
-void mlx4_cmd_event(struct mlx4_dev *dev, u16 token, u8 status, u64 out_param)
-{
-	struct mlx4_priv *priv = mlx4_priv(dev);
-	struct mlx4_cmd_context *context =
-		&priv->cmd.context[token & priv->cmd.token_mask];
-
-	/* previously timed out command completing at long last */
-	if (token != context->token)
-		return;
-
-	context->result    = mlx4_status_to_errno(status);
-	context->out_param = out_param;
-
-	complete(&context->done);
-}
-
-static int mlx4_cmd_wait(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
-			 int out_is_imm, u32 in_modifier, u8 op_modifier,
-			 u16 op, unsigned long timeout)
-{
-	struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
-	struct mlx4_cmd_context *context;
-	int err = 0;
-
-	down(&cmd->event_sem);
-
-	spin_lock(&cmd->context_lock);
-	BUG_ON(cmd->free_head < 0);
-	context = &cmd->context[cmd->free_head];
-	context->token += cmd->token_mask + 1;
-	cmd->free_head = context->next;
-	spin_unlock(&cmd->context_lock);
-
-	init_completion(&context->done);
-
-	mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
-		      in_modifier, op_modifier, op, context->token, 1);
-
-	if (!wait_for_completion_timeout(&context->done, msecs_to_jiffies(timeout))) {
-		err = -EBUSY;
-		goto out;
-	}
-
-	err = context->result;
-	if (err)
-		goto out;
-
-	if (out_is_imm)
-		*out_param = context->out_param;
-
-out:
-	spin_lock(&cmd->context_lock);
-	context->next = cmd->free_head;
-	cmd->free_head = context - cmd->context;
-	spin_unlock(&cmd->context_lock);
-
-	up(&cmd->event_sem);
-	return err;
-}
-
-int __mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
-	       int out_is_imm, u32 in_modifier, u8 op_modifier,
-	       u16 op, unsigned long timeout)
-{
-	if (mlx4_priv(dev)->cmd.use_events)
-		return mlx4_cmd_wait(dev, in_param, out_param, out_is_imm,
-				     in_modifier, op_modifier, op, timeout);
-	else
-		return mlx4_cmd_poll(dev, in_param, out_param, out_is_imm,
-				     in_modifier, op_modifier, op, timeout);
-}
-EXPORT_SYMBOL_GPL(__mlx4_cmd);
-
-int mlx4_cmd_init(struct mlx4_dev *dev)
-{
-	struct mlx4_priv *priv = mlx4_priv(dev);
-
-	mutex_init(&priv->cmd.hcr_mutex);
-	sema_init(&priv->cmd.poll_sem, 1);
-	priv->cmd.use_events = 0;
-	priv->cmd.toggle     = 1;
-
-	priv->cmd.hcr = ioremap(pci_resource_start(dev->pdev, 0) + MLX4_HCR_BASE,
-				MLX4_HCR_SIZE);
-	if (!priv->cmd.hcr) {
-		mlx4_err(dev, "Couldn't map command register.");
-		return -ENOMEM;
-	}
-
-	priv->cmd.pool = pci_pool_create("mlx4_cmd", dev->pdev,
-					 MLX4_MAILBOX_SIZE,
-					 MLX4_MAILBOX_SIZE, 0);
-	if (!priv->cmd.pool) {
-		iounmap(priv->cmd.hcr);
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-void mlx4_cmd_cleanup(struct mlx4_dev *dev)
-{
-	struct mlx4_priv *priv = mlx4_priv(dev);
-
-	pci_pool_destroy(priv->cmd.pool);
-	iounmap(priv->cmd.hcr);
-}
-
-/*
- * Switch to using events to issue FW commands (can only be called
- * after event queue for command events has been initialized).
- */
-int mlx4_cmd_use_events(struct mlx4_dev *dev)
-{
-	struct mlx4_priv *priv = mlx4_priv(dev);
-	int i;
-
-	priv->cmd.context = kmalloc(priv->cmd.max_cmds *
-				   sizeof (struct mlx4_cmd_context),
-				   GFP_KERNEL);
-	if (!priv->cmd.context)
-		return -ENOMEM;
-
-	for (i = 0; i < priv->cmd.max_cmds; ++i) {
-		priv->cmd.context[i].token = i;
-		priv->cmd.context[i].next  = i + 1;
-	}
-
-	priv->cmd.context[priv->cmd.max_cmds - 1].next = -1;
-	priv->cmd.free_head = 0;
-
-	sema_init(&priv->cmd.event_sem, priv->cmd.max_cmds);
-	spin_lock_init(&priv->cmd.context_lock);
-
-	for (priv->cmd.token_mask = 1;
-	     priv->cmd.token_mask < priv->cmd.max_cmds;
-	     priv->cmd.token_mask <<= 1)
-		; /* nothing */
-	--priv->cmd.token_mask;
-
-	priv->cmd.use_events = 1;
-
-	down(&priv->cmd.poll_sem);
-
-	return 0;
-}
-
-/*
- * Switch back to polling (used when shutting down the device)
- */
-void mlx4_cmd_use_polling(struct mlx4_dev *dev)
-{
-	struct mlx4_priv *priv = mlx4_priv(dev);
-	int i;
-
-	priv->cmd.use_events = 0;
-
-	for (i = 0; i < priv->cmd.max_cmds; ++i)
-		down(&priv->cmd.event_sem);
-
-	kfree(priv->cmd.context);
-
-	up(&priv->cmd.poll_sem);
-}
-
-struct mlx4_cmd_mailbox *mlx4_alloc_cmd_mailbox(struct mlx4_dev *dev)
-{
-	struct mlx4_cmd_mailbox *mailbox;
-
-	mailbox = kmalloc(sizeof *mailbox, GFP_KERNEL);
-	if (!mailbox)
-		return ERR_PTR(-ENOMEM);
-
-	mailbox->buf = pci_pool_alloc(mlx4_priv(dev)->cmd.pool, GFP_KERNEL,
-				      &mailbox->dma);
-	if (!mailbox->buf) {
-		kfree(mailbox);
-		return ERR_PTR(-ENOMEM);
-	}
-
-	return mailbox;
-}
-EXPORT_SYMBOL_GPL(mlx4_alloc_cmd_mailbox);
-
-void mlx4_free_cmd_mailbox(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox)
-{
-	if (!mailbox)
-		return;
-
-	pci_pool_free(mlx4_priv(dev)->cmd.pool, mailbox->buf, mailbox->dma);
-	kfree(mailbox);
-}
-EXPORT_SYMBOL_GPL(mlx4_free_cmd_mailbox);