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Date: Mon, 01 Nov 2010 20:51:27 +0000
From: Ben Hutchings <bhutchings@...arflare.com>
To: Jon Mason <jon.mason@...r.com>
Cc: David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
Sivakumar Subramani <sivakumar.subramani@...r.com>,
Sreenivasa Honnur <sreenivasa.honnur@...r.com>,
Ram Vepa <ram.vepa@...r.com>
Subject: Re: [PATCH 05/11] vxge: add support for ethtool firmware flashing
On Thu, 2010-10-28 at 21:19 -0500, Jon Mason wrote:
> Add the ability in the vxge driver to flash firmware via ethtool.
[...]
> +enum vxge_hw_status
> +vxge_update_fw_image(struct __vxge_hw_device *hldev, const u8 *fwdata, int size)
> +{
> + u64 data0 = 0, data1 = 0, steer_ctrl = 0;
> + struct __vxge_hw_virtualpath *vpath;
> + enum vxge_hw_status status;
> + int ret_code, sec_code, i;
> +
> + vpath = &hldev->virtual_paths[hldev->first_vp_id];
> +
> + /* send upgrade start command */
> + status = vxge_hw_vpath_fw_api(vpath,
> + VXGE_HW_FW_UPGRADE_ACTION,
> + VXGE_HW_FW_UPGRADE_MEMO,
> + VXGE_HW_FW_UPGRADE_OFFSET_START,
> + &data0, &data1, &steer_ctrl);
> + if (status != VXGE_HW_OK) {
> + vxge_debug_init(VXGE_ERR, " %s: Upgrade start cmd failed",
> + __func__);
> + return status;
> + }
> +
> + /* Transfer fw image to adapter 16 bytes at a time */
> + for (; size > 0; size -= VXGE_HW_FW_UPGRADE_BLK_SIZE) {
> + data0 = data1 = steer_ctrl = 0;
> +
> + /* send 16 bytes at a time */
> + for (i = 0; i < VXGE_HW_BYTES_PER_U64; i++) {
> + data0 |= (u64)fwdata[i] << (i * VXGE_HW_BYTES_PER_U64);
You apparently mean to multiply i by the number of bits in a byte here.
This happens to be equal to VXGE_HW_BYTES_PER_U64 but it still doesn't
make sense to use that name for it.
[...]
> diff --git a/drivers/net/vxge/vxge-ethtool.c b/drivers/net/vxge/vxge-ethtool.c
> index 6194fd9..c5ab375 100644
> --- a/drivers/net/vxge/vxge-ethtool.c
> +++ b/drivers/net/vxge/vxge-ethtool.c
> @@ -11,7 +11,7 @@
> * Virtualized Server Adapter.
> * Copyright(c) 2002-2010 Exar Corp.
> ******************************************************************************/
> -#include<linux/ethtool.h>
> +#include <linux/ethtool.h>
> #include <linux/slab.h>
> #include <linux/pci.h>
> #include <linux/etherdevice.h>
> @@ -29,7 +29,6 @@
> * Return value:
> * 0 on success.
> */
> -
> static int vxge_ethtool_sset(struct net_device *dev, struct ethtool_cmd *info)
> {
> /* We currently only support 10Gb/FULL */
> @@ -148,8 +147,7 @@ static void vxge_ethtool_gregs(struct net_device *dev,
> static int vxge_ethtool_idnic(struct net_device *dev, u32 data)
> {
> struct vxgedev *vdev = (struct vxgedev *)netdev_priv(dev);
> - struct __vxge_hw_device *hldev = (struct __vxge_hw_device *)
> - pci_get_drvdata(vdev->pdev);
> + struct __vxge_hw_device *hldev = vdev->devh;
>
> vxge_hw_device_flick_link_led(hldev, VXGE_FLICKER_ON);
> msleep_interruptible(data ? (data * HZ) : VXGE_MAX_FLICKER_TIME);
> @@ -168,11 +166,10 @@ static int vxge_ethtool_idnic(struct net_device *dev, u32 data)
> * void
> */
> static void vxge_ethtool_getpause_data(struct net_device *dev,
> - struct ethtool_pauseparam *ep)
> + struct ethtool_pauseparam *ep)
> {
> struct vxgedev *vdev = (struct vxgedev *)netdev_priv(dev);
> - struct __vxge_hw_device *hldev = (struct __vxge_hw_device *)
> - pci_get_drvdata(vdev->pdev);
> + struct __vxge_hw_device *hldev = vdev->devh;
>
> vxge_hw_device_getpause_data(hldev, 0, &ep->tx_pause, &ep->rx_pause);
> }
> @@ -188,11 +185,10 @@ static void vxge_ethtool_getpause_data(struct net_device *dev,
> * int, returns 0 on Success
> */
> static int vxge_ethtool_setpause_data(struct net_device *dev,
> - struct ethtool_pauseparam *ep)
> + struct ethtool_pauseparam *ep)
> {
> struct vxgedev *vdev = (struct vxgedev *)netdev_priv(dev);
> - struct __vxge_hw_device *hldev = (struct __vxge_hw_device *)
> - pci_get_drvdata(vdev->pdev);
> + struct __vxge_hw_device *hldev = vdev->devh;
>
> vxge_hw_device_setpause_data(hldev, 0, ep->tx_pause, ep->rx_pause);
>
> @@ -211,7 +207,7 @@ static void vxge_get_ethtool_stats(struct net_device *dev,
> struct vxge_vpath *vpath = NULL;
>
> struct vxgedev *vdev = (struct vxgedev *)netdev_priv(dev);
> - struct __vxge_hw_device *hldev = vdev->devh;
> + struct __vxge_hw_device *hldev = vdev->devh;
> struct vxge_hw_xmac_stats *xmac_stats;
> struct vxge_hw_device_stats_sw_info *sw_stats;
> struct vxge_hw_device_stats_hw_info *hw_stats;
These changes seem to be entirely unrelated to the patch description.
> @@ -1153,6 +1149,25 @@ static int vxge_set_flags(struct net_device *dev, u32 data)
> return 0;
> }
>
> +static int vxge_fw_flash(struct net_device *dev, struct ethtool_flash *parms)
> +{
> + struct vxgedev *vdev = (struct vxgedev *)netdev_priv(dev);
> +
> + if (vdev->max_vpath_supported != VXGE_HW_MAX_VIRTUAL_PATHS) {
> + printk(KERN_INFO "Single Function Mode is required to flash the"
> + " firmware\n");
> + return -EINVAL;
> + }
> +
> + if (netif_running(dev)) {
> + printk(KERN_INFO "Interface %s must be down to flash the "
> + "firmware\n", dev->name);
> + return -EINVAL;
> + }
> +
> + return vxge_fw_upgrade(vdev, parms->data, 1);
> +}
I think EBUSY is a more appropriate error code. There is nothing wrong
with the arguments, only the current state of the device.
[...]
> diff --git a/drivers/net/vxge/vxge-main.c b/drivers/net/vxge/vxge-main.c
> index d977a63..52a48e7 100644
> --- a/drivers/net/vxge/vxge-main.c
> +++ b/drivers/net/vxge/vxge-main.c
[...]
> @@ -3277,30 +3279,23 @@ vxge_device_unregister(struct __vxge_hw_device *hldev)
> struct vxgedev *vdev;
> struct net_device *dev;
> char buf[IFNAMSIZ];
> -#if ((VXGE_DEBUG_INIT & VXGE_DEBUG_MASK) || \
> - (VXGE_DEBUG_ENTRYEXIT & VXGE_DEBUG_MASK))
> - u32 level_trace;
> -#endif
>
> dev = hldev->ndev;
> vdev = netdev_priv(dev);
> -#if ((VXGE_DEBUG_INIT & VXGE_DEBUG_MASK) || \
> - (VXGE_DEBUG_ENTRYEXIT & VXGE_DEBUG_MASK))
> - level_trace = vdev->level_trace;
> -#endif
> - vxge_debug_entryexit(level_trace,
> - "%s: %s:%d", vdev->ndev->name, __func__, __LINE__);
> + vxge_debug_entryexit(vdev->level_trace, "%s: %s:%d", dev->name,
> + __func__, __LINE__);
>
> - memcpy(buf, vdev->ndev->name, IFNAMSIZ);
> + memcpy(buf, dev->name, IFNAMSIZ);
>
> /* in 2.6 will call stop() if device is up */
> unregister_netdev(dev);
>
> flush_scheduled_work();
>
> - vxge_debug_init(level_trace, "%s: ethernet device unregistered", buf);
> - vxge_debug_entryexit(level_trace,
> - "%s: %s:%d Exiting...", buf, __func__, __LINE__);
> + vxge_debug_init(vdev->level_trace, "%s: ethernet device unregistered",
> + buf);
> + vxge_debug_entryexit(vdev->level_trace, "%s: %s:%d Exiting...", buf,
> + __func__, __LINE__);
> }
>
> /*
More apparently unrelated changes.
> @@ -3924,6 +3919,142 @@ static inline u32 vxge_get_num_vfs(u64 function_mode)
> return num_functions;
> }
>
> +int vxge_fw_upgrade(struct vxgedev *vdev, char *fw_name, int override)
> +{
> + struct __vxge_hw_device *hldev = vdev->devh;
> + u32 maj, min, bld, cmaj, cmin, cbld;
> + enum vxge_hw_status status;
> + const struct firmware *fw;
> + int ret;
> +
> + ret = request_firmware(&fw, fw_name, &vdev->pdev->dev);
> + if (ret) {
> + vxge_debug_init(VXGE_ERR, "%s: Firmware file '%s' not found",
> + VXGE_DRIVER_NAME, fw_name);
> + goto out;
> + }
> +
> + /* Load the new firmware onto the adapter */
> + status = vxge_update_fw_image(hldev, fw->data, fw->size);
> + if (status != VXGE_HW_OK) {
> + vxge_debug_init(VXGE_ERR,
> + "%s: FW image download to adapter failed '%s'.",
> + VXGE_DRIVER_NAME, fw_name);
> + ret = -EFAULT;
Surely EIO or EINVAL.
> + goto out;
> + }
> +
> + /* Read the version of the new firmware */
> + status = vxge_hw_upgrade_read_version(hldev, &maj, &min, &bld);
> + if (status != VXGE_HW_OK) {
> + vxge_debug_init(VXGE_ERR,
> + "%s: Upgrade read version failed '%s'.",
> + VXGE_DRIVER_NAME, fw_name);
> + ret = -EFAULT;
EIO.
> + goto out;
> + }
> +
> + cmaj = vdev->config.device_hw_info.fw_version.major;
> + cmin = vdev->config.device_hw_info.fw_version.minor;
> + cbld = vdev->config.device_hw_info.fw_version.build;
> + /* It's possible the version in /lib/firmware is not the latest version.
> + * If so, we could get into a loop of trying to upgrade to the latest
> + * and flashing the older version.
> + */
> + if (VXGE_FW_VER(maj, min, bld) == VXGE_FW_VER(cmaj, cmin, cbld) &&
> + !override) {
> + ret = -EINVAL;
> + goto out;
> + }
> +
> + printk(KERN_NOTICE "Upgrade to firmware version %d.%d.%d commencing\n",
> + maj, min, bld);
> +
> + /* Flash the adapter with the new firmware */
> + status = vxge_hw_flash_fw(hldev);
> + if (status != VXGE_HW_OK) {
> + vxge_debug_init(VXGE_ERR, "%s: Upgrade commit failed '%s'.",
> + VXGE_DRIVER_NAME, fw_name);
> + ret = -EFAULT;
> + goto out;
> + }
> +
> + printk(KERN_NOTICE "Upgrade of firmware successful! Adapter must be "
> + "hard reset before using, thus requiring a system reboot or a "
> + "hotplug event.\n");
Then what is the point of having the driver manage this? And how can
you be sure the user will even see this message?
[...]
> +static int vxge_probe_fw_update(struct vxgedev *vdev)
> +{
[...]
> + ret = vxge_fw_upgrade(vdev, fw_name, 0);
> + /* -EINVAL and -ENOENT are not fatal errors for flashing firmware on
> + * probe, so ignore them
> + */
> + if (ret != -EINVAL && ret != -ENOENT)
> + return -EFAULT;
[..]
EIO.
Ben.
--
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
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