From: Scott Branden <scott.branden@broadcom.com>
To: Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Scott Branden <scott.branden@broadcom.com>,
Desmond Yan <desmond.yan@broadcom.com>
Cc: Kees Cook <keescook@chromium.org>,
linux-kernel@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com,
Olof Johansson <olof@lixom.net>, James Hu <james.hu@broadcom.com>
Subject: [PATCH v8 07/13] misc: bcm-vk: add ioctl load_image
Date: Mon, 30 Nov 2020 10:41:54 -0800 [thread overview]
Message-ID: <20201130184200.5095-8-scott.branden@broadcom.com> (raw)
In-Reply-To: <20201130184200.5095-1-scott.branden@broadcom.com>
Add ioctl support to issue load_image operation to VK card.
Co-developed-by: Desmond Yan <desmond.yan@broadcom.com>
Signed-off-by: Desmond Yan <desmond.yan@broadcom.com>
Co-developed-by: James Hu <james.hu@broadcom.com>
Signed-off-by: James Hu <james.hu@broadcom.com>
Signed-off-by: Scott Branden <scott.branden@broadcom.com>
---
drivers/misc/bcm-vk/bcm_vk.h | 3 +
drivers/misc/bcm-vk/bcm_vk_dev.c | 95 ++++++++++++++++++++++++++++++++
2 files changed, 98 insertions(+)
diff --git a/drivers/misc/bcm-vk/bcm_vk.h b/drivers/misc/bcm-vk/bcm_vk.h
index 5f0fcfdaf265..726aab71bb6b 100644
--- a/drivers/misc/bcm-vk/bcm_vk.h
+++ b/drivers/misc/bcm-vk/bcm_vk.h
@@ -12,6 +12,7 @@
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/sched/signal.h>
+#include <linux/uaccess.h>
#include <uapi/linux/misc/bcm_vk.h>
#include "bcm_vk_msg.h"
@@ -220,6 +221,8 @@ struct bcm_vk {
struct bcm_vk_dauth_info dauth_info;
+ /* mutex to protect the ioctls */
+ struct mutex mutex;
struct miscdevice miscdev;
int devid; /* dev id allocated */
diff --git a/drivers/misc/bcm-vk/bcm_vk_dev.c b/drivers/misc/bcm-vk/bcm_vk_dev.c
index 79fffb1e6f84..203a1cf2bae3 100644
--- a/drivers/misc/bcm-vk/bcm_vk_dev.c
+++ b/drivers/misc/bcm-vk/bcm_vk_dev.c
@@ -10,6 +10,7 @@
#include <linux/idr.h>
#include <linux/kref.h>
#include <linux/module.h>
+#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/pci_regs.h>
#include <uapi/linux/misc/bcm_vk.h>
@@ -580,6 +581,71 @@ static void bcm_vk_wq_handler(struct work_struct *work)
}
}
+static long bcm_vk_load_image(struct bcm_vk *vk,
+ const struct vk_image __user *arg)
+{
+ struct device *dev = &vk->pdev->dev;
+ const char *image_name;
+ struct vk_image image;
+ u32 next_loadable;
+ enum soc_idx idx;
+ int image_idx;
+ int ret = -EPERM;
+
+ if (copy_from_user(&image, arg, sizeof(image)))
+ return -EACCES;
+
+ if ((image.type != VK_IMAGE_TYPE_BOOT1) &&
+ (image.type != VK_IMAGE_TYPE_BOOT2)) {
+ dev_err(dev, "invalid image.type %u\n", image.type);
+ return ret;
+ }
+
+ next_loadable = bcm_vk_next_boot_image(vk);
+ if (next_loadable != image.type) {
+ dev_err(dev, "Next expected image %u, Loading %u\n",
+ next_loadable, image.type);
+ return ret;
+ }
+
+ /*
+ * if something is pending download already. This could only happen
+ * for now when the driver is being loaded, or if someone has issued
+ * another download command in another shell.
+ */
+ if (test_and_set_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload) != 0) {
+ dev_err(dev, "Download operation already pending.\n");
+ return ret;
+ }
+
+ image_name = image.filename;
+ if (image_name[0] == '\0') {
+ /* Use default image name if NULL */
+ idx = get_soc_idx(vk);
+ if (idx == VK_IDX_INVALID)
+ goto err_idx;
+
+ /* Image idx starts with boot1 */
+ image_idx = image.type - VK_IMAGE_TYPE_BOOT1;
+ image_name = get_load_fw_name(vk, &image_tab[idx][image_idx]);
+ if (!image_name) {
+ dev_err(dev, "No suitable image found for type %d",
+ image.type);
+ ret = -ENOENT;
+ goto err_idx;
+ }
+ } else {
+ /* Ensure filename is NULL terminated */
+ image.filename[sizeof(image.filename) - 1] = '\0';
+ }
+ ret = bcm_vk_load_image_by_type(vk, image.type, image_name);
+ dev_info(dev, "Load %s, ret %d\n", image_name, ret);
+err_idx:
+ clear_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload);
+
+ return ret;
+}
+
static void bcm_to_v_reset_doorbell(struct bcm_vk *vk, u32 db_val)
{
vkwrite32(vk, db_val, BAR_0, VK_BAR0_RESET_DB_BASE);
@@ -636,10 +702,38 @@ static int bcm_vk_trigger_reset(struct bcm_vk *vk)
return 0;
}
+static long bcm_vk_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ long ret = -EINVAL;
+ struct bcm_vk_ctx *ctx = file->private_data;
+ struct bcm_vk *vk = container_of(ctx->miscdev, struct bcm_vk, miscdev);
+ void __user *argp = (void __user *)arg;
+
+ dev_dbg(&vk->pdev->dev,
+ "ioctl, cmd=0x%02x, arg=0x%02lx\n",
+ cmd, arg);
+
+ mutex_lock(&vk->mutex);
+
+ switch (cmd) {
+ case VK_IOCTL_LOAD_IMAGE:
+ ret = bcm_vk_load_image(vk, argp);
+ break;
+
+ default:
+ break;
+ }
+
+ mutex_unlock(&vk->mutex);
+
+ return ret;
+}
+
static const struct file_operations bcm_vk_fops = {
.owner = THIS_MODULE,
.open = bcm_vk_open,
.release = bcm_vk_release,
+ .unlocked_ioctl = bcm_vk_ioctl,
};
static int bcm_vk_on_panic(struct notifier_block *nb,
@@ -670,6 +764,7 @@ static int bcm_vk_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
return -ENOMEM;
kref_init(&vk->kref);
+ mutex_init(&vk->mutex);
err = pci_enable_device(pdev);
if (err) {
--
2.17.1
next prev parent reply other threads:[~2020-11-30 18:44 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-30 18:41 [PATCH v8 00/13] Add Broadcom VK driver Scott Branden
2020-11-30 18:41 ` [PATCH v8 01/13] bcm-vk: add bcm_vk UAPI Scott Branden
2020-11-30 18:41 ` [PATCH v8 02/13] misc: bcm-vk: add Broadcom VK driver Scott Branden
2020-11-30 18:41 ` [PATCH v8 03/13] misc: bcm-vk: add autoload support Scott Branden
2020-11-30 18:41 ` [PATCH v8 04/13] misc: bcm-vk: add misc device to Broadcom VK driver Scott Branden
2020-11-30 18:41 ` [PATCH v8 05/13] misc: bcm-vk: add triggers when host panic or reboots to notify card Scott Branden
2020-11-30 18:41 ` [PATCH v8 06/13] misc: bcm-vk: add open/release Scott Branden
2020-11-30 18:41 ` Scott Branden [this message]
2020-11-30 18:41 ` [PATCH v8 08/13] misc: bcm-vk: add get_card_info, peerlog_info, and proc_mon_info Scott Branden
2020-11-30 18:41 ` [PATCH v8 09/13] misc: bcm-vk: add VK messaging support Scott Branden
2020-11-30 18:41 ` [PATCH v8 10/13] misc: bcm-vk: reset_pid support Scott Branden
2020-11-30 18:41 ` [PATCH v8 11/13] misc: bcm-vk: add mmap function for exposing BAR2 Scott Branden
2020-11-30 18:41 ` [PATCH v8 12/13] MAINTAINERS: bcm-vk: add maintainer for Broadcom VK Driver Scott Branden
2020-11-30 18:42 ` [PATCH v8 13/13] misc: bcm-vk: add ttyVK support Scott Branden
2021-01-17 18:47 ` [PATCH v8 00/13] Add Broadcom VK driver Olof Johansson
2021-01-18 7:17 ` Greg Kroah-Hartman
2021-01-18 23:06 ` Olof Johansson
2021-01-19 20:21 ` Scott Branden
2021-01-20 7:59 ` Greg Kroah-Hartman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201130184200.5095-8-scott.branden@broadcom.com \
--to=scott.branden@broadcom.com \
--cc=arnd@arndb.de \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=desmond.yan@broadcom.com \
--cc=gregkh@linuxfoundation.org \
--cc=james.hu@broadcom.com \
--cc=keescook@chromium.org \
--cc=linux-kernel@vger.kernel.org \
--cc=olof@lixom.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).