[PATCH 1/1] drivers: misc: Add support for nCipher HSM devices

From: Dave Kim
Date: Tue Dec 17 2019 - 08:23:28 EST

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ïFrom: David Kim <david.kim@xxxxxxxxxxx>

Introduce the driver for nCipher's Solo and Solo XC range of PCIe hardware
security modules (HSM), which provide key creation/management and
cryptography services.

Co-developed-by: Tim Magee <tim.magee@xxxxxxxxxxx>
Signed-off-by: Tim Magee <tim.magee@xxxxxxxxxxx>
Signed-off-by: David Kim <david.kim@xxxxxxxxxxx>

---
MAINTAINERS | 8 +
drivers/misc/Kconfig | 1 +
drivers/misc/Makefile | 1 +
drivers/misc/ncipher/Kconfig | 8 +
drivers/misc/ncipher/Makefile | 7 +
drivers/misc/ncipher/fsl.c | 911 +++++++++++++++++
drivers/misc/ncipher/fsl.h | 117 +++
drivers/misc/ncipher/hostif.c | 1521 +++++++++++++++++++++++++++++
drivers/misc/ncipher/i21555.c | 553 +++++++++++
drivers/misc/ncipher/i21555.h | 68 ++
drivers/misc/ncipher/solo.h | 316 ++++++
include/uapi/linux/nshield_solo.h | 181 ++++
12 files changed, 3692 insertions(+)
create mode 100644 drivers/misc/ncipher/Kconfig
create mode 100644 drivers/misc/ncipher/Makefile
create mode 100644 drivers/misc/ncipher/fsl.c
create mode 100644 drivers/misc/ncipher/fsl.h
create mode 100644 drivers/misc/ncipher/hostif.c
create mode 100644 drivers/misc/ncipher/i21555.c
create mode 100644 drivers/misc/ncipher/i21555.h
create mode 100644 drivers/misc/ncipher/solo.h
create mode 100644 include/uapi/linux/nshield_solo.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 061d59a4a80b..e49b9e44fd3d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11319,6 +11319,14 @@ NATSEMI ETHERNET DRIVER (DP8381x)
S: Orphan
F: drivers/net/ethernet/natsemi/natsemi.c

+NCIPHER NSHIELD HARDWARE SECURITY MODULE DRIVERS
+M: Tim Magee <tim.magee@xxxxxxxxxxx>
+M: David Kim <david.kim@xxxxxxxxxxx>
+M: Hamish Cameron <hamish.cameron@xxxxxxxxxxx>
+L: linux-kernel@xxxxxxxxxxxxxxx
+S: Supported
+F: drivers/misc/ncipher/
+
NCR 5380 SCSI DRIVERS
M: Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx>
M: Michael Schmitz <schmitzmic@xxxxxxxxx>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 7f0d48f406e3..a6265ad5ca98 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -480,4 +480,5 @@ source "drivers/misc/cxl/Kconfig"
source "drivers/misc/ocxl/Kconfig"
source "drivers/misc/cardreader/Kconfig"
source "drivers/misc/habanalabs/Kconfig"
+source "drivers/misc/ncipher/Kconfig"
endmenu
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index c1860d35dc7e..8e4a6ab0a7ba 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -57,3 +57,4 @@ obj-y += cardreader/
obj-$(CONFIG_PVPANIC) += pvpanic.o
obj-$(CONFIG_HABANA_AI) += habanalabs/
obj-$(CONFIG_XILINX_SDFEC) += xilinx_sdfec.o
+obj-$(CONFIG_NCIPHER) += ncipher/
diff --git a/drivers/misc/ncipher/Kconfig b/drivers/misc/ncipher/Kconfig
new file mode 100644
index 000000000000..5b466cd1896a
--- /dev/null
+++ b/drivers/misc/ncipher/Kconfig
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+# Enable support for nCipher's nShield Solo and Solo XC
+config HSM_NCIPHER_NSHIELD_SOLO
+ tristate "nCipher Solo and Solo XC family of PCIe HSMs"
+ depends on PCI
+ help
+ Select this as built-in or module if you expect to use
+ a Hardware Security Module from nCipher's Solo or Solo XC range.
diff --git a/drivers/misc/ncipher/Makefile b/drivers/misc/ncipher/Makefile
new file mode 100644
index 000000000000..b4d5f92addee
--- /dev/null
+++ b/drivers/misc/ncipher/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for nCipher nShield HSM drivers
+#
+
+obj-$(CONFIG_HSM_NCIPHER_NSHIELD_SOLO) := nshield_solo.o
+nshield_solo-y := hostif.o fsl.o i21555.o
diff --git a/drivers/misc/ncipher/fsl.c b/drivers/misc/ncipher/fsl.c
new file mode 100644
index 000000000000..5c4edeef64c0
--- /dev/null
+++ b/drivers/misc/ncipher/fsl.c
@@ -0,0 +1,911 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *
+ * fsl.c: nCipher PCI HSM FSL command driver
+ * Copyright 2019 nCipher Security Ltd
+ *
+ */
+
+#include "solo.h"
+#include "fsl.h"
+
+/**
+ * Resets FSL device.
+ *
+ * Extra device info is initialized the first time created.
+ *
+ * @param ndev common device.
+ * @returns 0 if successful, other value if error.
+ */
+static int fsl_create(struct nfp_dev *ndev)
+{
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ if (ndev->created) {
+ dev_notice(&ndev->pcidev->dev,
+ "%s: device already created", __func__);
+ return 0;
+ }
+
+ ndev->active_bar = -1;
+ ndev->detection_type = NFP_HSM_POLLING;
+ ndev->conn_status = NFP_HSM_STARTING;
+
+ /* try to reset check doorbell registers
+ * (don't read back in case they hang)
+ */
+ ndev->active_bar = FSL_MEMBAR;
+ fsl_outl(ndev, FSL_OFFSET_DOORBELL_CS_STATUS, NFAST_INT_DEVICE_CLR);
+
+ if (!ndev->bar[ndev->active_bar]) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: null FSL memory BAR[%d]",
+ __func__, ndev->active_bar);
+ return -ENOMEM;
+ }
+
+ /* set our context to just be a pointer to ourself */
+ ndev->cmdctx = ndev;
+
+ /* try to reset read/write doorbell registers
+ * (don't read back in case they hang)
+ */
+ dev_notice(&ndev->pcidev->dev,
+ "%s: clearing read/write doorbell registers", __func__);
+ fsl_outl(ndev, FSL_OFFSET_DOORBELL_WR_CMD, NFAST_INT_HOST_CLR);
+ fsl_outl(ndev, FSL_OFFSET_DOORBELL_RD_CMD, NFAST_INT_HOST_CLR);
+
+ dev_notice(&ndev->pcidev->dev, "%s: exiting %s active_bar: %d.",
+ __func__, __func__, ndev->active_bar);
+
+ ndev->created = 1;
+
+ return 0;
+}
+
+/**
+ * Destroys an FSL device.
+ *
+ * @param ctx device context (always the device itself).
+ * @returns 0 if successful, other value if error.
+ */
+static int fsl_destroy(struct nfp_dev *ctx)
+{
+ struct nfp_dev *ndev;
+
+ /* check for device */
+ ndev = ctx;
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* clear doorbell registers */
+ if (ndev->bar[ndev->active_bar]) {
+ dev_notice(&ndev->pcidev->dev,
+ "%s: clearing doorbell registers", __func__);
+ fsl_outl(ndev,
+ FSL_OFFSET_DOORBELL_WR_STATUS, NFAST_INT_DEVICE_CLR);
+ fsl_outl(ndev,
+ FSL_OFFSET_DOORBELL_RD_STATUS, NFAST_INT_DEVICE_CLR);
+ fsl_outl(ndev,
+ FSL_OFFSET_DOORBELL_CS_STATUS, NFAST_INT_DEVICE_CLR);
+ } else {
+ dev_err(&ndev->pcidev->dev,
+ "%s: warning: no FSL BAR[%d] memory",
+ __func__, ndev->active_bar);
+ }
+
+ return 0;
+}
+
+/**
+ * Returns fsl_created status.
+ *
+ * @param ndev common device.
+ * @returns 0 if created or other value if error.
+ */
+static int fsl_created(struct nfp_dev *ndev)
+{
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ if (!ndev->created) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: device not created", __func__);
+ return -ENODEV;
+ }
+
+ if (!ndev->bar[ndev->active_bar]) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: no FSL BAR[%d] memory", __func__,
+ ndev->active_bar);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+/* ----------------------------------------------------- */
+/* This call needs to be in synch with the ISR or the ISR will come in the
+ * middle of a write/read op and cause problems.
+ */
+static int fsl_connection_status(struct nfp_dev *ndev, int lock_flag,
+ int epd_status)
+{
+ int status = NFP_HSM_STARTING;
+
+ /* check for device */
+ if (!ndev)
+ return -ENODEV;
+
+ /* this code is mainly to support backwards compatibility with the
+ * interrupt driven approach to detection.
+ */
+ if (epd_status == NFP_HSM_POLLING) {
+ ndev->detection_type = NFP_HSM_POLLING;
+ ndev->conn_status = 0;
+ } else if (epd_status == NFAST_INT_DEVICE_PCI_DOWN) {
+ ndev->conn_status = NFP_HSM_STARTING;
+ }
+
+ status = ndev->conn_status;
+ return status;
+}
+
+/**
+ * Returns connection check status.
+ *
+ * @param ndev common device.
+ * @returns 0 if started, NFP_HSM_STARTING if not ready,
+ * or other value if error.
+ */
+static int fsl_started(struct nfp_dev *ndev, int lock_flag)
+{
+ int status = NFP_HSM_STARTING;
+ int epd_status = NFP_HSM_STARTING;
+ u32 doorbell_cs = 0x0;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ if (!ndev->bar[ndev->active_bar]) {
+ dev_err(&ndev->pcidev->dev, "%s: error: no FSL BAR[%d] memory",
+ __func__, ndev->active_bar);
+ return -ENOMEM;
+ }
+
+ /* check the status register to see if epd has started */
+ doorbell_cs = fsl_inl(ndev, FSL_OFFSET_DOORBELL_POLLING);
+ dev_notice(&ndev->pcidev->dev,
+ "%s: doorbell_polling is: %x", __func__, doorbell_cs);
+
+ if (doorbell_cs == NFAST_INT_DEVICE_POLL) {
+ epd_status = NFP_HSM_POLLING;
+ dev_notice(&ndev->pcidev->dev,
+ "%s: EPD in polling mode", __func__);
+ } else if (doorbell_cs == NFAST_INT_DEVICE_PCI_DOWN) {
+ epd_status = NFAST_INT_DEVICE_PCI_DOWN;
+ }
+ /* check current connection status */
+ status = fsl_connection_status(ndev, lock_flag, epd_status);
+
+ if (status == 0) {
+ dev_notice(&ndev->pcidev->dev, "%s: device started", __func__);
+ } else if (status == NFP_HSM_STARTING) {
+ dev_notice(&ndev->pcidev->dev, "%s: device starting", __func__);
+ /* Closest existing error code */
+ status = -EAGAIN;
+ } else {
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: device failure: code 0x%x",
+ __func__, status);
+ }
+
+ return status;
+}
+
+/**
+ * Updates the connection check status.
+ *
+ * @param ndev common device.
+ * @param status new status
+ * @returns 0 if stopped or other value if error.
+ */
+
+static int fsl_update_connection_status(struct nfp_dev *ndev, int status)
+{
+ int current_status;
+
+ if (!ndev)
+ return -ENODEV;
+
+ current_status = ndev->conn_status;
+ ndev->conn_status = status;
+ return current_status;
+}
+
+/**
+ * Completes a connection check status interrupt.
+ *
+ * @param ndev common device.
+ * @param status device status.
+ */
+static void fsl_check_complete(struct nfp_dev *ndev, int status)
+{
+ int ne;
+ int started;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* check for device */
+
+ ne = fsl_created(ndev);
+ if (ne != 0) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: check not completed", __func__);
+ return;
+ }
+
+ /* started becomes true after fsl_create and the first cs interrupt is
+ * successful.
+ * It switches to false right after since cs_status is set to
+ * 0 right after this check
+ * A fsl_close or a fsl_create can
+ * reset the cs_status to NFP_HSM_STARTING again.
+ */
+ started =
+ (fsl_update_connection_status(ndev, status) ==
+ NFP_HSM_STARTING) && (status == 0);
+
+ /* reset read/write doorbell registers if just started */
+
+ if (started) {
+ dev_notice(&ndev->pcidev->dev,
+ "fsl_create: clearing read/write doorbell registers");
+ fsl_outl(ndev, FSL_OFFSET_DOORBELL_WR_CMD, NFAST_INT_HOST_CLR);
+ fsl_inl(ndev, FSL_OFFSET_DOORBELL_WR_CMD);
+ fsl_outl(ndev, FSL_OFFSET_DOORBELL_RD_CMD, NFAST_INT_HOST_CLR);
+ fsl_inl(ndev, FSL_OFFSET_DOORBELL_RD_CMD);
+ fsl_outl(ndev,
+ FSL_OFFSET_DOORBELL_WR_STATUS, NFAST_INT_DEVICE_CLR);
+ fsl_inl(ndev, FSL_OFFSET_DOORBELL_WR_STATUS);
+ fsl_outl(ndev,
+ FSL_OFFSET_DOORBELL_RD_STATUS, NFAST_INT_DEVICE_CLR);
+ fsl_inl(ndev, FSL_OFFSET_DOORBELL_RD_STATUS);
+ }
+
+ if (status == 0) {
+ dev_notice(&ndev->pcidev->dev, "%s: device started", __func__);
+ } else if (status == NFP_HSM_STARTING) {
+ dev_notice(&ndev->pcidev->dev,
+ "%s: device not started yet", __func__);
+ } else {
+ dev_err(&ndev->pcidev->dev,
+ "%s: device check failed with code: 0x%x",
+ __func__, status);
+ }
+}
+
+/**
+ * Handles an interrupt from the FSL device.
+ *
+ * @param ctx device context (always the device itself).
+ * @param handled set non-zero by this routine if interrupt considered handled
+ * @returns 0 if successful, other value if error.
+ */
+static int fsl_isr(struct nfp_dev *ctx, int *handled)
+{
+ struct nfp_dev *ndev = ctx;
+ int ne;
+ u32 doorbell_rd, doorbell_wr, doorbell_cs;
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* mark not yet handled */
+ *handled = 0;
+
+ ne = fsl_created(ndev);
+ if (ne != 0) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: interrupt not handled", __func__);
+ return ne;
+ }
+
+ ++ndev->stats.isr;
+
+ doorbell_wr = fsl_inl(ndev, FSL_OFFSET_DOORBELL_WR_STATUS);
+ doorbell_rd = fsl_inl(ndev, FSL_OFFSET_DOORBELL_RD_STATUS);
+ doorbell_cs = fsl_inl(ndev, FSL_OFFSET_DOORBELL_CS_STATUS);
+ dev_notice(&ndev->pcidev->dev, "%s: cs:= %x,rd:=%x,wr:=%x",
+ __func__, doorbell_cs, doorbell_rd, doorbell_wr);
+
+ while (doorbell_rd || doorbell_wr || doorbell_cs) {
+ /* prevent any illegal combination of set bits from triggering
+ * processing. Note that if anyone of these registers have an
+ * incorrect bit set, it would prevent the other operations from
+ * being processed since we return from the ISR, even if they
+ * have legal values. This is an unlikely scenario since these
+ * registers are written either to 0 or one of the legal values
+ * by the software on the card.
+ */
+ if ((doorbell_cs) &&
+ ((doorbell_cs & ~NFAST_INT_DEVICE_CHECK_OK) &&
+ (doorbell_cs & ~NFAST_INT_DEVICE_CHECK_FAILED))) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: illegal bits in doorbell_cs %x",
+ __func__, doorbell_cs);
+ *handled = 1;
+ /* clear the register*/
+ fsl_outl(ndev, FSL_OFFSET_DOORBELL_CS_STATUS,
+ NFAST_INT_DEVICE_CLR);
+ return 0;
+ }
+ if ((doorbell_rd) &&
+ ((doorbell_rd & ~NFAST_INT_DEVICE_READ_OK) &&
+ (doorbell_rd & ~NFAST_INT_DEVICE_READ_FAILED))) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: illegal bits in doorbell_rd %x",
+ __func__, doorbell_rd);
+ *handled = 1;
+ /* clear the register*/
+ fsl_outl(ndev, FSL_OFFSET_DOORBELL_RD_STATUS,
+ NFAST_INT_DEVICE_CLR);
+ return 0;
+ }
+ if ((doorbell_wr) &&
+ ((doorbell_wr & ~NFAST_INT_DEVICE_WRITE_OK) &&
+ (doorbell_wr & ~NFAST_INT_DEVICE_WRITE_FAILED))) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: illegal bits in doorbell_wr %x",
+ __func__, doorbell_wr);
+ /* clear the register*/
+ fsl_outl(ndev, FSL_OFFSET_DOORBELL_WR_STATUS,
+ NFAST_INT_DEVICE_CLR);
+ *handled = 1;
+ return 0;
+ }
+
+ /* service interrupts.
+ * if we made it here, the doorbell registers are all valid,
+ * so no need to check for their validity anymore.
+ */
+
+ if (doorbell_wr) {
+ fsl_outl(ndev, FSL_OFFSET_DOORBELL_WR_STATUS,
+ NFAST_INT_DEVICE_CLR);
+ ndev->stats.isr_write++;
+ nfp_write_complete(ndev,
+ doorbell_wr &
+ NFAST_INT_DEVICE_WRITE_OK ?
+ 1 : 0);
+ dev_notice(&ndev->pcidev->dev,
+ "%s: acknowledging write interrupt: ok = %d",
+ __func__,
+ doorbell_wr & NFAST_INT_DEVICE_WRITE_OK
+ ? 1 : 0);
+ }
+
+ if (doorbell_rd) {
+ fsl_outl(ndev, FSL_OFFSET_DOORBELL_RD_STATUS,
+ NFAST_INT_DEVICE_CLR);
+ ndev->stats.isr_read++;
+ nfp_read_complete(ndev,
+ doorbell_rd &
+ NFAST_INT_DEVICE_READ_OK ? 1 : 0);
+ dev_notice(&ndev->pcidev->dev,
+ "%s: acknowledging read interrupt: ok = %d",
+ __func__,
+ doorbell_rd & NFAST_INT_DEVICE_READ_OK ? 1 : 0);
+ }
+ /* the doorbell_cs is being phased out in favor of polling since
+ * there were issues caused by this interrupt being issued from
+ * the card on its own when the driver was not even present.
+ * To maintain backwards compatibility, this code is being kept,
+ * but might be removed in the future.
+ */
+ dev_notice(&ndev->pcidev->dev, "%s: doorbell_cs is: %x",
+ __func__, doorbell_cs);
+ if (doorbell_cs) {
+ fsl_outl(ndev, FSL_OFFSET_DOORBELL_CS_STATUS,
+ NFAST_INT_DEVICE_CLR);
+ fsl_check_complete(ndev,
+ doorbell_cs &
+ NFAST_INT_DEVICE_CHECK_OK ?
+ 0 :
+ NFP_HSM_STARTING);
+ dev_notice(&ndev->pcidev->dev,
+ "%s: acknowledging check interrupt: status:0x%x",
+ __func__,
+ doorbell_cs & NFAST_INT_DEVICE_CHECK_OK ?
+ 0 :
+ NFP_HSM_STARTING);
+ }
+
+ doorbell_wr = fsl_inl(ndev, FSL_OFFSET_DOORBELL_WR_STATUS);
+ doorbell_rd = fsl_inl(ndev, FSL_OFFSET_DOORBELL_RD_STATUS);
+ doorbell_cs = fsl_inl(ndev, FSL_OFFSET_DOORBELL_CS_STATUS);
+
+ dev_notice(&ndev->pcidev->dev, "%s: cs status in isr is: %x",
+ __func__, doorbell_cs);
+ }
+
+ /* always report the interrupt as handled */
+ *handled = 1;
+
+ dev_notice(&ndev->pcidev->dev, "%s: exiting", __func__);
+
+ return 0;
+}
+
+/**
+ * Performs additional FSL-specific actions when opening a device.
+ *
+ * This routine returns an error if the device has not properly started.
+ *
+ * @param ctx device context (always the device itself).
+ * @returns 0 if successful, other value if error.
+ */
+static int fsl_open(struct nfp_dev *ctx)
+{
+ struct nfp_dev *ndev = ctx;
+ int ne;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* check for device */
+
+ ne = fsl_started(ndev, NFP_WITH_LOCK);
+ if (ne != 0) {
+ ndev->stats.ensure_fail++;
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: device not started", __func__);
+ return ne;
+ }
+
+ return 0;
+}
+
+/**
+ * Performs additional FSL-specific actions when closing a device.
+ *
+ * @param ctx device context (always the device itself).
+ * @returns 0 if successful, other value if error.
+ */
+static int fsl_close(struct nfp_dev *ctx)
+{
+ struct nfp_dev *ndev = ctx;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ return 0;
+}
+
+/**
+ * Sets control data.
+ *
+ * The device control register is writen directly. No doorbell style handshake
+ * is used.
+ *
+ * @param control control string to copy from.
+ * @param ctx device context (always the device itself).
+ * @returns 0 if successful, other value if error.
+ */
+static int fsl_set_control(const struct nfdev_control_str *control,
+ struct nfp_dev *ctx)
+{
+ struct nfp_dev *ndev = ctx;
+ int ne;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* check for device */
+
+ ndev = (struct nfp_dev *)ctx;
+ ne = fsl_started(ndev, NFP_WITH_LOCK);
+ if (ne != 0) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: unable to set control", __func__);
+ return ne;
+ }
+
+ /* set control (written immediately with no explicit
+ * synchronization with the firmware)
+ */
+
+ fsl_outl(ndev, FSL_OFFSET_REGISTER_CONTROL, control->control);
+
+ return 0;
+}
+
+/**
+ * Returns status data.
+ *
+ * The device status registers are read immediately. No doorbell style
+ * handshake is used. Without explicit synchronization, it is possible
+ * that an inconsistent state may be returned if the status is being
+ * updated by the firmware while simultaneously being read by the host.
+ * For example, the call could return an updated status word with a not
+ * as yet updated error string. This is likely a degenerate case.
+ *
+ * @param status string to copy into.
+ * @param ctx device context (always the device itself).
+ * @returns 0 if successful, other value if error.
+ */
+static int fsl_get_status(struct nfdev_status_str *status, struct nfp_dev *ctx)
+{
+ struct nfp_dev *ndev = ctx;
+ int ne;
+ u32 *error = (uint32_t *)status->error;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* check for device */
+
+ ndev = (struct nfp_dev *)ctx;
+ ne = fsl_started(ndev, NFP_WITH_LOCK);
+ if (ne != 0) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: unable to get status", __func__);
+ return ne;
+ }
+
+ /* get status (read immediately with no explicit synchronization
+ * with the firmware)
+ */
+
+ status->status = fsl_inl(ndev, FSL_OFFSET_REGISTER_STATUS);
+ error[0] = fsl_inl(ndev, FSL_OFFSET_REGISTER_ERROR_LO);
+ error[1] = fsl_inl(ndev, FSL_OFFSET_REGISTER_ERROR_HI);
+
+ return 0;
+}
+
+/**
+ * Initiates a device read request.
+ *
+ * @param addr 32-bit bus address used by DMA to push reply from device.
+ * @param len maximum length data to return.
+ * @param ctx device context (always the device itself).
+ * @returns 0 if read initiated, NFP_HSM_STARTING if device not ready,
+ * or other value if error.
+ */
+static int fsl_ensure_reading(dma_addr_t addr,
+ int len, struct nfp_dev *ctx, int lock_flag)
+{
+ struct nfp_dev *ndev = ctx;
+ __le32 hdr[3];
+ __le32 tmp32;
+ int ne;
+ int hdr_len;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* check for device */
+
+ ndev = (struct nfp_dev *)ctx;
+ ne = fsl_started(ndev, lock_flag);
+ if (ne != 0) {
+ ndev->stats.ensure_fail++;
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: unable to initiate read", __func__);
+ return ne;
+ }
+
+ dev_notice(&ndev->pcidev->dev, "%s: ndev->bar[ndev->active_bar]= %p",
+ __func__, (void *)ndev->bar[ndev->active_bar]);
+
+ /* send read request */
+
+ if (addr) {
+ dev_notice(&ndev->pcidev->dev,
+ "%s: requesting DMA reply to bus address %p",
+ __func__, (void *)addr);
+ hdr[0] = cpu_to_le32(NFPCI_JOB_CONTROL_PCI_PUSH);
+ hdr[1] = cpu_to_le32(len);
+ hdr[2] = cpu_to_le32(addr);
+ hdr_len = 3 * sizeof(hdr[0]);
+ } else {
+ hdr[0] = cpu_to_le32(NFPCI_JOB_CONTROL);
+ hdr[1] = cpu_to_le32(len);
+ hdr_len = 2 * sizeof(hdr[0]);
+ }
+ memcpy(ndev->bar[ndev->active_bar] + NFPCI_JOBS_RD_CONTROL,
+ (char const *)hdr, hdr_len);
+
+ /* confirm read request */
+
+ memcpy((char *)hdr,
+ ndev->bar[ndev->active_bar] + NFPCI_JOBS_RD_LENGTH,
+ sizeof(hdr[0]));
+ tmp32 = cpu_to_le32(len);
+ if (hdr[0] != tmp32) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: expected length not written (%08x != %08x)",
+ __func__, hdr[0], tmp32);
+ ndev->stats.ensure_fail++;
+ return -EIO;
+ }
+
+ /* trigger read request */
+
+ fsl_outl(ndev, FSL_OFFSET_DOORBELL_RD_CMD, NFAST_INT_HOST_READ_REQUEST);
+
+ ndev->stats.ensure++;
+
+ dev_notice(&ndev->pcidev->dev,
+ "%s: requesting max %d bytes", __func__, len);
+
+ return 0;
+}
+
+/**
+ * Reads a device read reply.
+ *
+ * @param block data buffer to copy into.
+ * @param len maximum length of data to copy.
+ * @param ctx device context (always the device itself).
+ * @param rcnt returned actual # of bytes copied
+ * @returns 0 if read initiated, NFP_HSM_STARTING if device not ready,
+ * or other value if error.
+ */
+static int fsl_read(char *block, int len, struct nfp_dev *ctx, int *rcnt)
+{
+ struct nfp_dev *ndev = ctx;
+ int ne;
+ int cnt;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ *rcnt = 0;
+
+ /* check for device */
+
+ ndev = (struct nfp_dev *)ctx;
+ ne = fsl_started(ndev, NFP_WITH_LOCK);
+ if (ne != 0) {
+ ndev->stats.read_fail++;
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: unable to complete read", __func__);
+ return ne;
+ }
+
+ /* receive reply length */
+
+ memcpy((char *)&cnt,
+ ndev->bar[ndev->active_bar] + NFPCI_JOBS_RD_LENGTH,
+ sizeof(cnt));
+ cnt = le32_to_cpu(cnt);
+ dev_notice(&ndev->pcidev->dev, "%s: cnt=%u.", __func__, cnt);
+ if (cnt < 0 || cnt > len) {
+ ndev->stats.read_fail++;
+ dev_err(&ndev->pcidev->dev, "%s: error: bad byte count (%d) from device",
+ __func__, cnt);
+ return -EIO;
+ }
+
+ /* receive data */
+
+ ne = copy_to_user(block, ndev->bar[ndev->active_bar] +
+ NFPCI_JOBS_RD_DATA, cnt) ? -EFAULT : 0;
+ if (ne != 0) {
+ ndev->stats.read_fail++;
+ dev_err(&ndev->pcidev->dev, "%s: error: copy_to_user failed",
+ __func__);
+ return ne;
+ }
+
+ *rcnt = cnt;
+ ndev->stats.read_block++;
+ ndev->stats.read_byte += cnt;
+ dev_warn(&ndev->pcidev->dev, "%s: read %d bytes (std)", __func__, cnt);
+
+ return 0;
+}
+
+/**
+ * Initiates a device write request.
+ *
+ * @param addr 32-bit bus address used by DMA to pull request to device.
+ * @param block data buffer to copy from.
+ * @param len length of data to copy.
+ * @param ctx device context (always the device itself).
+ * @returns 0 if write successful, NFP_HSM_STARTING if device not
+ * ready, or other value if error.
+ */
+static int fsl_write(u32 addr, char const *block, int len, struct nfp_dev *ctx)
+{
+ struct nfp_dev *ndev = ctx;
+ __le32 hdr[3];
+ int ne;
+ __le32 tmp32;
+ int hdr_len;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* check for device */
+
+ ndev = (struct nfp_dev *)ctx;
+ ne = fsl_started(ndev, NFP_WITH_LOCK);
+ if (ne != 0) {
+ ndev->stats.write_fail++;
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: unable to initiate write", __func__);
+ return ne;
+ }
+
+ if (addr == 0) {
+ /* std write */
+
+ dev_notice(&ndev->pcidev->dev, "%s: ndev->bar[ndev->active_bar]= %p",
+ __func__, (void *)ndev->bar[ndev->active_bar]);
+ dev_notice(&ndev->pcidev->dev,
+ "%s: block len %d", __func__, len);
+
+ /* send write request */
+
+ ne = copy_from_user(ndev->bar[ndev->active_bar] +
+ NFPCI_JOBS_WR_DATA, block, len)
+ ? -EFAULT : 0;
+ if (ne != 0) {
+ ndev->stats.write_fail++;
+ dev_err(&ndev->pcidev->dev,
+ "%s: error: copy_from_user failed", __func__);
+ return ne;
+ }
+
+ hdr[0] = cpu_to_le32(NFPCI_JOB_CONTROL);
+ hdr[1] = cpu_to_le32(len);
+ hdr_len = 2 * sizeof(hdr[0]);
+ memcpy(ndev->bar[ndev->active_bar] + NFPCI_JOBS_WR_CONTROL,
+ (char const *)hdr, hdr_len);
+
+ /* confirm write request */
+
+ memcpy((char *)hdr,
+ ndev->bar[ndev->active_bar] + NFPCI_JOBS_WR_LENGTH,
+ sizeof(hdr[0]));
+ tmp32 = cpu_to_le32(len);
+ if (hdr[0] != tmp32) {
+ ndev->stats.write_fail++;
+ dev_err(&ndev->pcidev->dev, "%s: length not written (%08x != %08x)",
+ __func__, hdr[0], tmp32);
+ return -EIO;
+ }
+ } else {
+ /* dma write */
+
+ dev_notice(&ndev->pcidev->dev, "%s: ndev->bar[ndev->active_bar]= %p",
+ __func__, (void *)ndev->bar[ndev->active_bar]);
+ dev_notice(&ndev->pcidev->dev,
+ "%s: block len %d", __func__, len);
+ dev_notice(&ndev->pcidev->dev, "%s: pull from 0x%016x using DMA",
+ __func__, addr);
+
+ /* submit write request */
+
+ hdr[0] = cpu_to_le32(NFPCI_JOB_CONTROL_PCI_PULL);
+ hdr[1] = cpu_to_le32(len);
+ hdr[2] = cpu_to_le32(addr);
+ hdr_len = 3 * sizeof(hdr[0]);
+ memcpy(ndev->bar[ndev->active_bar] + NFPCI_JOBS_WR_CONTROL,
+ (char const *)hdr, hdr_len);
+
+ /* confirm write request */
+
+ memcpy((char *)hdr,
+ ndev->bar[ndev->active_bar] + NFPCI_JOBS_WR_LENGTH,
+ sizeof(hdr[0]));
+ tmp32 = cpu_to_le32(len);
+ if (hdr[0] != tmp32) {
+ ndev->stats.write_fail++;
+ dev_err(&ndev->pcidev->dev,
+ "%s: length not written (%08x != %08x)",
+ __func__, tmp32, hdr[0]);
+ return -EIO;
+ }
+ }
+
+ /* trigger write */
+
+ fsl_outl(ndev,
+ FSL_OFFSET_DOORBELL_WR_CMD, NFAST_INT_HOST_WRITE_REQUEST);
+
+ ndev->stats.write_block++;
+ ndev->stats.write_byte += len;
+
+ dev_notice(&ndev->pcidev->dev, "%s: done", __func__);
+ return 0;
+}
+
+/** FSL Sawshark T1022 device configuration. */
+const struct nfpcmd_dev fsl_t1022_cmddev = { "nCipher nShield Solo XC",
+ PCI_VENDOR_ID_FREESCALE,
+ PCI_DEVICE_ID_FREESCALE_T1022,
+ PCI_VENDOR_ID_NCIPHER,
+ PCI_SUBSYSTEM_ID_NFAST_REV1,
+ { 0, FSL_MEMSIZE, 0, 0, 0, 0 },
+ NFP_CMD_FLG_NEED_MSI,
+ NFDEV_IF_PCI_PULL,
+ fsl_create,
+ fsl_destroy,
+ fsl_open,
+ fsl_close,
+ fsl_isr,
+ fsl_write,
+ fsl_read,
+ fsl_ensure_reading,
+ fsl_set_control,
+ fsl_get_status };
+/* end of file */
diff --git a/drivers/misc/ncipher/fsl.h b/drivers/misc/ncipher/fsl.h
new file mode 100644
index 000000000000..d0fa32496215
--- /dev/null
+++ b/drivers/misc/ncipher/fsl.h
@@ -0,0 +1,117 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ *
+ * Interface to the Solo XC's T1022 communication processor
+ * Copyright 2019 nCipher Security Ltd
+ *
+ */
+
+#ifndef NFP_FSL_H
+#define NFP_FSL_H
+
+#include <linux/io.h>
+#include "solo.h"
+
+/* Always use a lock when 'we' call fsl_started */
+#define NFP_WITH_LOCK 1
+
+/* PCI FSL definitions */
+
+#ifndef PCI_VENDOR_ID_FREESCALE
+#define PCI_VENDOR_ID_FREESCALE 0x1957
+#endif
+
+#ifndef PCI_DEVICE_ID_FREESCALE_T1022
+#define PCI_DEVICE_ID_FREESCALE_T1022 0x082c
+#endif
+
+#ifndef PCI_VENDOR_ID_NCIPHER
+#define PCI_VENDOR_ID_NCIPHER 0x0100
+#endif
+
+#ifndef PCI_SUBSYSTEM_ID_NFAST_REV1
+#define PCI_SUBSYSTEM_ID_NFAST_REV1 0x0100
+#endif
+
+#define FSL_CFG_SEC_CMD_STATUS 0x4C
+#define FSL_CFG_CMD_MASTER 0x10
+
+#define FSL_MEMBAR 1
+
+/* NFAST extended PCI register definitions */
+
+#define NFPCI_OFFSET_JOBS_DS 0x00020000
+
+/* Interrupts from device to host */
+
+#define NFAST_INT_DEVICE_CLR 0x00000000
+#define NFAST_INT_DEVICE_CHECK_OK 0x00000100
+#define NFAST_INT_DEVICE_CHECK_FAILED 0x00000200
+#define NFAST_INT_DEVICE_POLL 0x00000300
+#define NFAST_INT_DEVICE_PCI_DOWN 0x00000400
+
+/* Interrupts from host to device */
+
+#define NFAST_INT_HOST_CLR 0x00000000
+
+/* PCI FSL register definitions */
+
+#define FSL_LENGTH NFPCI_RAM_MINSIZE_JOBS
+#define FSL_MEMSIZE NFPCI_RAM_MINSIZE_KERN
+
+#define FSL_DOORBELL_LOCATION (FSL_MEMSIZE - 0x100)
+
+#define FSL_OFFSET_DOORBELL_RD_CMD 0x00u
+#define FSL_OFFSET_DOORBELL_WR_CMD 0x04u
+#define FSL_OFFSET_DOORBELL_RD_STATUS 0x08u
+#define FSL_OFFSET_DOORBELL_WR_STATUS 0x0Cu
+#define FSL_OFFSET_DOORBELL_CS_STATUS 0x10u
+
+#define FSL_OFFSET_REGISTER_CONTROL 0x20u
+#define FSL_OFFSET_REGISTER_STATUS 0x24u
+#define FSL_OFFSET_REGISTER_ERROR_LO 0x28u
+#define FSL_OFFSET_REGISTER_ERROR_HI 0x2Cu
+#define FSL_OFFSET_DOORBELL_POLLING 0x30u
+
+#define FSL_MAGIC 0x12345678u
+
+/** Monitor firmware supports MOI control and error reporting */
+#define NFDEV_STATUS_MONITOR_MOI 0x0001
+
+/** Application firmware supports MOI control and error reporting */
+#define NFDEV_STATUS_APPLICATION_MOI 0x0002
+
+/** Application firmware running and supports error reporting */
+#define NFDEV_STATUS_APPLICATION_RUNNING 0x0004
+
+/**
+ * Writes a 32 bit word across PCI to the FSL card.
+ *
+ * @param ndev command device.
+ * @param bar base address region id.
+ * @param offset offset in bytes from base address.
+ * @param value 32 bit value being written.
+ */
+static inline void fsl_outl(struct nfp_dev *ndev, int offset, u32 value)
+{
+ iowrite32(cpu_to_le32(value), ndev->bar[ndev->active_bar] +
+ FSL_DOORBELL_LOCATION + offset);
+}
+
+/**
+ * Reads a 32 bit word across PCI from the FSL card.
+ *
+ * @param ndev command device.
+ * @param bar base address region id.
+ * @param offset offset in bytes from base address.
+ * @returns 32 bit value.
+ */
+static inline uint32_t fsl_inl(struct nfp_dev *ndev, int offset)
+{
+ return le32_to_cpu(ioread32(ndev->bar[ndev->active_bar]
+ + FSL_DOORBELL_LOCATION + offset));
+}
+
+#endif /* NFP_FSL_H */
+
+/* end of file */
diff --git a/drivers/misc/ncipher/hostif.c b/drivers/misc/ncipher/hostif.c
new file mode 100644
index 000000000000..1562c0e2fe07
--- /dev/null
+++ b/drivers/misc/ncipher/hostif.c
@@ -0,0 +1,1521 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *
+ * hostif.c: nCipher PCI HSM linux host interface
+ * Copyright 2019 nCipher Security Ltd
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/bitops.h>
+
+#include "solo.h"
+#include "i21555.h"
+#include "fsl.h"
+
+/* limits & sizes ------------------------------------------------ */
+#define NFP_READ_MAX (8 * 1024)
+#define NFP_WRITE_MAX (8 * 1024)
+#define NFP_READBUF_SIZE (NFP_READ_MAX + 8)
+#define NFP_WRITEBUF_SIZE (NFP_WRITE_MAX + 8)
+#define NFP_MAXDEV 16
+
+/* other operating constants ------------------------------------- */
+#define NFP_TIMEOUT_SEC 20
+#define NFP_DMA_NBYTES_OFFSET (4)
+#define NFP_DMA_ADDRESS_OFFSET (8)
+#define NFP_DRVNAME "nCipher nFast PCI driver"
+#define NFP_TIMEOUT ((NFP_TIMEOUT_SEC) * HZ)
+
+/* Interpretation of the bits of struct nfp_dev.rd_outstanding */
+#define WAIT_BIT 0 /* waiting for data */
+#define CMPLT_BIT 1 /* completing a read (got data or timing out) */
+
+/* Used to determine which installed module we're looking at
+ * from its minor device number
+ */
+#define INODE_FROM_FILE(file) ((file)->f_path.dentry->d_inode)
+
+/* Major device type
+ * "nCipher nFast PCI crypto accelerator" in
+ * https://www.kernel.org/doc/html/v4.11/admin-guide/devices.html
+ */
+#define NFP_MAJOR 176 /* */
+
+/* device list --------------------------------------------------- */
+
+static struct nfp_dev *nfp_dev_list[NFP_MAXDEV];
+static int nfp_num_devices;
+static struct class *nfp_class;
+/*! @} */
+
+/**
+ * @addtogroup modparams
+ * Module structures.
+ * @{
+ */
+
+/**
+ * NSHIELD_SOLO module interface version parameter.
+ *
+ * This value can be overridden when the module is loaded, for example:
+ *
+ * insmod nshield_solo.ko nfp_ifvers=<n>
+ *
+ * where n = 0 allows any supported interface,
+ * n > 0 allows only interface versions <= n.
+ * See nfdev-common.h for a list of supported interface versions.
+ * Specific card models may not support all interface versions.
+ */
+static int nfp_ifvers;
+
+MODULE_AUTHOR("nCipher");
+MODULE_DESCRIPTION("nCipher PCI HSM driver");
+module_param(nfp_ifvers, int, 0444);
+MODULE_PARM_DESC(nfp_ifvers, "maximum interface version (1-2), or any (0)");
+MODULE_LICENSE("GPL");
+
+/** @} */
+
+/**
+ * @addtogroup fops
+ * NSHIELD_SOLO character device file operations.
+ * @{
+ */
+
+/**
+ * Polls an NSHIELD SOLO device.
+ *
+ * The kernel calls this function when a user tries to poll an NSHIELD SOLO
+ * device. The function returns a bit mask which indicates if the device is
+ * immediately readable or writable. A readable device will set
+ * (POLLIN | POLLRDNORM). A writable device will set (POLLOUT | POLLWRNORM).
+ *
+ * @param filep device file pointer.
+ * @param wait poll table pointer.
+ * @returns mask indicating if readable and/or writable.
+ */
+static u32 nfp_poll(struct file *file, poll_table *wait)
+{
+ struct nfp_dev *ndev;
+ u32 mask = 0;
+ int minor = MINOR(INODE_FROM_FILE(file)->i_rdev);
+
+ if (minor >= NFP_MAXDEV) {
+ pr_err("%s: minor out of range.", __func__);
+ return -ENODEV;
+ }
+
+ ndev = nfp_dev_list[minor];
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* find ndev from minor */
+
+ poll_wait(file, &ndev->wr_queue, wait);
+ poll_wait(file, &ndev->rd_queue, wait);
+
+ if (test_bit(0, &ndev->wr_ready))
+ mask |= POLLOUT | POLLWRNORM; /* writeable */
+ if (test_bit(0, &ndev->rd_ready))
+ mask |= POLLIN | POLLRDNORM; /* readable */
+
+ dev_notice(&ndev->pcidev->dev, "%s: device is %swritable, %sreadable",
+ __func__,
+ mask & POLLOUT ? "" : "not ", mask & POLLIN ? "" : "not ");
+
+ return mask;
+}
+
+void nfp_write_complete(struct nfp_dev *ndev, int ok)
+{
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* could be executed simultaneously by more than one thread -
+ * e.g. from the write isr and from the nfp_write/timeout
+ * we don't want that to happen.
+ */
+ if (test_and_set_bit(CMPLT_BIT, &ndev->wr_outstanding))
+ return;
+
+ if (!test_bit(WAIT_BIT, &ndev->wr_outstanding)) {
+ /* we can only get here if the write has already
+ * been completed
+ */
+ dev_err(&ndev->pcidev->dev,
+ "%s: no write outstanding to complete; ignoring completion",
+ __func__);
+ clear_bit(CMPLT_BIT, &ndev->wr_outstanding);
+ return;
+ }
+
+ /* complete write by waking waiting processes */
+ ndev->wr_ok = ok;
+
+ dev_notice(&ndev->pcidev->dev, "%s: write completed %sokay",
+ __func__, ok ? "" : "not ");
+
+ /* make sure that write is complete before we clear wr_outstanding */
+ smp_mb__before_atomic();
+ clear_bit(CMPLT_BIT, &ndev->wr_outstanding);
+ clear_bit(WAIT_BIT, &ndev->wr_outstanding);
+
+ /* wake up anyone waiting */
+
+ wake_up_all(&ndev->wr_queue);
+}
+
+#define CREATE_TRACE_POINTS
+
+/**
+ * Writes to an NSHIELD SOLO device.
+ *
+ * Data in the user space buffer is written to the NSHIELD SOLO device. Any
+ * previous data is overwritten. An error is returned if not all
+ * bytes are written from the user space buffer.
+ *
+ * @param file device file pointer.
+ * @param buf pointer to a user space buffer.
+ * @param count size of user space buffer.
+ * @param off offset position (ignored).
+ * @returns actual number of bytes written or a negative value if an erroR
+ * occurred.
+ */
+static ssize_t nfp_write(struct file *file, char const __user *buf,
+ size_t count, loff_t *off)
+{
+ struct nfp_dev *ndev;
+ u32 addr;
+ int nbytes;
+ int minor;
+ int ne;
+
+ /* find ndev from minor */
+ minor = MINOR(INODE_FROM_FILE(file)->i_rdev);
+ if (minor >= NFP_MAXDEV) {
+ pr_err("%s: minor out of range.", __func__);
+ return -ENODEV;
+ }
+
+ ndev = nfp_dev_list[minor];
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* check max length requested */
+ if (count <= 0 || NFP_WRITE_MAX < count) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: invalid requested write length %lu",
+ __func__, count);
+ return -EINVAL;
+ }
+
+ /* check if called before ready */
+ if (!test_and_clear_bit(0, &ndev->wr_ready)) {
+ dev_err(&ndev->pcidev->dev, "%s: write called when not ready.",
+ __func__);
+ return -ENXIO;
+ }
+ set_bit(WAIT_BIT, &ndev->wr_outstanding);
+
+ dev_notice(&ndev->pcidev->dev, "%s: writing %ld bytes",
+ __func__, count);
+
+ addr = 0;
+ if (ndev->ifvers >= NFDEV_IF_PCI_PULL) {
+ dev_notice(&ndev->pcidev->dev,
+ "%s: copying %lu bytes to dma buffer",
+ __func__, count);
+ addr = ndev->write_dma;
+ nbytes = cpu_to_le32(count);
+ *(u32 *)(ndev->write_buf + NFP_DMA_NBYTES_OFFSET) = nbytes;
+ if (0 !=
+ copy_from_user(ndev->write_buf + NFP_DMA_ADDRESS_OFFSET,
+ buf, count)) {
+ clear_bit(WAIT_BIT, &ndev->wr_outstanding);
+ set_bit(0, &ndev->wr_ready);
+ dev_err(&ndev->pcidev->dev,
+ "%s: copy from user space failed", __func__);
+ return -EIO;
+ }
+ }
+
+ ne = ndev->cmddev->write_block(addr, buf, count, ndev->cmdctx);
+ if (ne != 0) {
+ nfp_write_complete(ndev, 0);
+ if (ne != -EAGAIN)
+ dev_err(&ndev->pcidev->dev,
+ "%s: write_block failed", __func__);
+ }
+
+ while (test_bit(WAIT_BIT, &ndev->wr_outstanding)) {
+ if (!wait_event_timeout(ndev->wr_queue,
+ test_bit(WAIT_BIT,
+ &ndev->wr_outstanding) == 0,
+ NFP_TIMEOUT)) {
+ nfp_write_complete(ndev, 0);
+ set_bit(0, &ndev->wr_ready);
+ dev_err(&ndev->pcidev->dev,
+ "%s: module timed out", __func__);
+ return -ENXIO;
+ }
+ if (test_bit(WAIT_BIT, &ndev->wr_outstanding)) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: handling spurious wake-up", __func__);
+ }
+ }
+ set_bit(0, &ndev->wr_ready);
+
+ dev_warn(&ndev->pcidev->dev, "%s: returning %ld.", __func__,
+ ndev->wr_ok ? count : -EIO);
+
+ if (!ndev->wr_ok) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: device write failed", __func__);
+ return -EIO;
+ }
+
+ dev_warn(&ndev->pcidev->dev,
+ "%s: wrote %ld bytes (%s)", __func__, count,
+ ndev->ifvers >= NFDEV_IF_PCI_PULL ? "dma" : "std");
+ return count;
+}
+
+void nfp_read_complete(struct nfp_dev *ndev, int ok)
+{
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* could be executed simultaneously by more than one thread -
+ * e.g. from the read isr and from the timeout
+ * we don't want that to happen.
+ */
+ if (test_and_set_bit(CMPLT_BIT, &ndev->rd_outstanding))
+ return;
+
+ if (!test_bit(WAIT_BIT, &ndev->rd_outstanding)) {
+ /* we can only get here if the read has already been completed
+ * and no new ENSUREREADING request has been received since
+ */
+ dev_err(&ndev->pcidev->dev,
+ "%s: no read outstanding to complete; ignoring completion",
+ __func__);
+ clear_bit(CMPLT_BIT, &ndev->rd_outstanding);
+ return;
+ }
+
+ /* in case the timer has not expired */
+ del_timer(&ndev->rd_timer);
+
+ ndev->rd_ok = ok;
+ set_bit(0, &ndev->rd_ready);
+
+ dev_notice(&ndev->pcidev->dev, "%s: read completed %sokay",
+ __func__, ok ? "" : "not ");
+
+ /* make sure that rd_ready is set before we clear rd_outstanding */
+ smp_mb__before_atomic();
+ clear_bit(CMPLT_BIT, &ndev->rd_outstanding);
+ clear_bit(WAIT_BIT, &ndev->rd_outstanding);
+
+ /* wake up anyone waiting */
+
+ wake_up_all(&ndev->rd_queue);
+}
+
+static void nfp_read_timeout(struct timer_list *t)
+{
+ struct nfp_dev *ndev = from_timer(ndev, t, rd_timer);
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ nfp_read_complete(ndev, 0);
+}
+
+/**
+ * Reads from an NSHIELD SOLO device.
+ *
+ * Data is read from the NSHIELD SOLO device into the user space buffer.
+ * The read removes the data from the device. An error is returned is not
+ * all the bytes are read from the user space buffer.
+ *
+ * @param file device file pointer.
+ * @param buf pointer to a user space buffer.
+ * @param count maximum size of user space buffer.
+ * @param off offset position (ignored).
+ * @returns actual number of bytes read or a negative
+ * value if an error occurred.
+ */
+static ssize_t nfp_read(struct file *file, char __user *buf, size_t count,
+ loff_t *off)
+{
+ struct nfp_dev *ndev;
+ int nbytes;
+ int minor;
+ int ne;
+
+ minor = MINOR(INODE_FROM_FILE(file)->i_rdev);
+ if (minor >= NFP_MAXDEV) {
+ pr_err("%s: minor out of range.", __func__);
+ return -ENODEV;
+ }
+
+ ndev = nfp_dev_list[minor];
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* check user space buffer */
+ if (!access_ok(buf, count)) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: user space verify failed.", __func__);
+ return -EFAULT;
+ }
+
+ /* check max length requested */
+
+ if (count <= 0 || NFP_READ_MAX < count) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: invalid requested max read length %lu",
+ __func__, count);
+ return -EINVAL;
+ }
+
+ if (!test_and_clear_bit(0, &ndev->rd_ready)) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: read called when not ready.", __func__);
+ return -EIO;
+ }
+ nbytes = 0;
+
+ /* check if read was ok */
+
+ if (!ndev->rd_ok) {
+ dev_err(&ndev->pcidev->dev, "%s: read failed", __func__);
+ return -EIO;
+ }
+
+ /* finish read */
+
+ if (ndev->ifvers >= NFDEV_IF_PCI_PUSH) {
+ nbytes = *(u32 *)(ndev->read_buf + NFP_DMA_NBYTES_OFFSET);
+ nbytes = le32_to_cpu(nbytes);
+ dev_notice(&ndev->pcidev->dev,
+ "%s: nbytes %d", __func__, nbytes);
+ if (nbytes < 0 || nbytes > count) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: bad byte count (%d) from device",
+ __func__, nbytes);
+ return -EIO;
+ }
+ if (copy_to_user(buf, ndev->read_buf + NFP_DMA_ADDRESS_OFFSET,
+ nbytes) != 0) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: copy to user space failed", __func__);
+ return -EIO;
+ }
+ } else {
+ nbytes = 0;
+ ne = ndev->cmddev->read_block(buf, count, ndev->cmdctx,
+ (void *)&nbytes);
+ if (ne != 0) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: device read failed", __func__);
+ return ne;
+ }
+ }
+
+ if (nbytes > NFP_READ_MAX) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: read reply overflow: %d > %d max",
+ __func__, nbytes, NFP_READ_MAX);
+ return -EIO;
+ }
+
+ dev_warn(&ndev->pcidev->dev, "%s: read %d bytes (%s)", __func__, nbytes,
+ ndev->ifvers >= NFDEV_IF_PCI_PUSH ? "dma" : "std");
+ return nbytes;
+}
+
+static int nfp_alloc_pci_push(struct nfp_dev *ndev)
+{
+ /* allocate resources needed for PCI Push,
+ * if not already allocated.
+ * return True if successful
+ */
+ if (!ndev->read_buf) {
+ ndev->read_buf =
+ kzalloc(NFP_READBUF_SIZE, GFP_KERNEL | GFP_DMA);
+ if (!ndev->read_buf)
+ return -ENOMEM;
+
+ ndev->read_dma =
+ dma_map_single(&ndev->pcidev->dev, ndev->read_buf,
+ NFP_READBUF_SIZE, DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(&ndev->pcidev->dev, ndev->read_dma)) {
+ dev_err(&ndev->pcidev->dev,
+ "dma_mapping_error found after attempting dma_map_single");
+ kfree(ndev->read_buf);
+ ndev->read_buf = NULL;
+ ndev->read_dma = 0;
+ }
+ }
+ return ndev->read_buf ? 1 : 0;
+}
+
+static int nfp_alloc_pci_pull(struct nfp_dev *ndev)
+{
+ /* allocate resources needed for PCI Pull,
+ * if not already allocated.
+ * return True if successful
+ */
+ if (!ndev->write_buf) {
+ ndev->write_buf =
+ kzalloc(NFP_WRITEBUF_SIZE, GFP_KERNEL | GFP_DMA);
+ if (!ndev->write_buf)
+ return -ENOMEM;
+
+ ndev->write_dma = dma_map_single(&ndev->pcidev->dev,
+ ndev->write_buf,
+ NFP_WRITEBUF_SIZE,
+ DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(&ndev->pcidev->dev, ndev->write_dma)) {
+ dev_err(&ndev->pcidev->dev,
+ "dma_mapping_error found after attempting dma_map_single");
+ kfree(ndev->write_buf);
+ ndev->write_buf = NULL;
+ ndev->write_dma = 0;
+ }
+ }
+ return ndev->write_buf ? 1 : 0;
+}
+
+static void nfp_free_pci_push(struct nfp_dev *ndev)
+{
+ /* free resources allocated to PCI Push */
+ if (ndev->read_buf) {
+ dma_unmap_single(&ndev->pcidev->dev, ndev->read_dma,
+ NFP_READBUF_SIZE, DMA_BIDIRECTIONAL);
+ kfree(ndev->read_buf);
+ ndev->read_buf = NULL;
+ ndev->read_dma = 0;
+ }
+}
+
+static void nfp_free_pci_pull(struct nfp_dev *ndev)
+{
+ /* free resources allocated to PCI Pull */
+ if (ndev->write_buf) {
+ dma_unmap_single(&ndev->pcidev->dev, ndev->write_dma,
+ NFP_WRITEBUF_SIZE, DMA_BIDIRECTIONAL);
+ kfree(ndev->write_buf);
+ ndev->write_buf = NULL;
+ ndev->write_dma = 0;
+ }
+}
+
+/*
+ * Sets device interface version.
+ *
+ * @param ndev an NSHIELD SOLO device.
+ * @param ifvers interface version.
+ * @returns interface version actually set.
+ */
+static int nfp_set_ifvers(struct nfp_dev *ndev, int ifvers)
+{
+ int max_ifvers;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return 0; /* no interface version */
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ max_ifvers = ndev->cmddev->max_ifvers;
+ if (nfp_ifvers != 0 && max_ifvers > nfp_ifvers)
+ max_ifvers = nfp_ifvers;
+
+ /* on any error, ifvers remains unchanged */
+ if (ifvers < 0 || ifvers > max_ifvers) {
+ /* invalid nfp_ifvers: set to max as fallback */
+ dev_err(&ndev->pcidev->dev, "%s: %d out of allowable range [0:%d]",
+ __func__, ifvers, max_ifvers);
+ return ndev->ifvers;
+ }
+
+ if (ifvers == 0 &&
+ ndev->cmddev->deviceid == PCI_DEVICE_ID_FREESCALE_T1022) {
+ /* default ifvers: set to max for ngsolo not for legacy!
+ * The legacy card needs it set to 0 when in Maintenance
+ * mode and then the hardserver steps it up to ifvers 2
+ * when switching back to Operational mode. Solo XC starts
+ * at the max (3) whenever possible.
+ */
+ ifvers = max_ifvers;
+ }
+
+ if (ifvers >= NFDEV_IF_PCI_PUSH) {
+ if (!nfp_alloc_pci_push(ndev)) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: can't set ifvers %d as resources not available",
+ __func__, ifvers);
+ return ndev->ifvers;
+ }
+ } else {
+ nfp_free_pci_push(ndev);
+ }
+
+ if (ifvers >= NFDEV_IF_PCI_PULL) {
+ if (!nfp_alloc_pci_pull(ndev)) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: can't set ifvers %d as resources not available",
+ __func__, ifvers);
+ return ndev->ifvers;
+ }
+ } else {
+ nfp_free_pci_pull(ndev);
+ }
+
+ ndev->ifvers = ifvers;
+ dev_warn(&ndev->pcidev->dev,
+ "%s: setting ifvers = %d", __func__, ifvers);
+
+ return ifvers;
+}
+
+/**
+ * Performs an NSHIELD SOLO device IOCTL call.
+ *
+ * @param inode device inode pointer.
+ * @param file device file pointer.
+ * @param cmd command id.
+ * @param arg command argument.
+ * @returns 0 if successful.
+ */
+static int nfp_ioctl(struct inode *inode,
+ struct file *file,
+ u32 cmd,
+ u64 arg)
+{
+ struct nfp_dev *ndev;
+ int minor;
+
+ /* find ndev from minor */
+ minor = MINOR(INODE_FROM_FILE(file)->i_rdev);
+
+ if (minor >= NFP_MAXDEV) {
+ pr_err("%s: minor out of range.", __func__);
+ return -ENODEV;
+ }
+
+ ndev = nfp_dev_list[minor];
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ switch (cmd) {
+ case NFDEV_IOCTL_ENQUIRY: {
+ struct nfdev_enquiry_str enq_data;
+ int err = -EIO;
+
+ dev_dbg(&ndev->pcidev->dev, "%s: enquiry", __func__);
+ enq_data.busno = ndev->busno;
+ enq_data.slotno = ndev->slotno;
+ if ((void *)arg) {
+ err = copy_to_user((void __user *)arg, &enq_data,
+ sizeof(enq_data)) ? -EFAULT : 0;
+ if (err) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: copy to user space failed.",
+ __func__);
+ return err;
+ }
+ } else {
+ dev_err(&ndev->pcidev->dev,
+ "%s enquiry: arg pointer is NULL!", __func__);
+ return err;
+ }
+ } break;
+ case NFDEV_IOCTL_ENSUREREADING:
+ case NFDEV_IOCTL_ENSUREREADING_BUG3349: {
+ dma_addr_t addr;
+ u32 len;
+ int err = -EIO;
+ int ne;
+
+ dev_dbg(&ndev->pcidev->dev, "%s: ensure reading", __func__);
+
+ /* get and check max length */
+ if ((void *)arg) {
+ err = copy_from_user((void *)&len, (void __user *)arg,
+ sizeof(u32)) ? -EFAULT : 0;
+ if (err) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: ensure reading: copy from user space failed.",
+ __func__);
+ return err;
+ }
+ /* signal a read to the module */
+ dev_warn(&ndev->pcidev->dev,
+ "%s: signalling read request to module, len = %x.",
+ __func__, len);
+ if (len > NFP_READ_MAX) {
+ dev_err(&ndev->pcidev->dev, "%s: len > %x = %x.",
+ __func__, NFP_READ_MAX, len);
+ return -EINVAL;
+ }
+ } else {
+ dev_err(&ndev->pcidev->dev,
+ "%s ensure reading: arg pointer is NULL!",
+ __func__);
+ return err;
+ }
+
+ if (len <= 0 || NFP_READ_MAX < len) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: ensure reading: invalid max length %d/%d",
+ __func__, len, NFP_READ_MAX);
+ err = -EINVAL;
+ return err;
+ }
+
+ /* check if okay to start read */
+
+ if (test_and_set_bit(WAIT_BIT, &ndev->rd_outstanding)) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: ensure reading: another read is outstanding",
+ __func__);
+ return -EBUSY;
+ }
+
+ dev_warn(&ndev->pcidev->dev,
+ "%s: ndev->rd_outstanding=1", __func__);
+
+ /* start read ready timeout */
+
+ mod_timer(&ndev->rd_timer, jiffies + (NFP_TIMEOUT_SEC * HZ));
+
+ dev_warn(&ndev->pcidev->dev, "%s: read request", __func__);
+ /* start read */
+
+ addr = (ndev->ifvers < NFDEV_IF_PCI_PUSH) ? 0 : ndev->read_dma;
+ dev_notice(&ndev->pcidev->dev,
+ "%s: ensure reading: read request with ifvers=%d addr=%p",
+ __func__, ndev->ifvers, (void *)addr);
+
+ ne = ndev->cmddev->ensure_reading(addr, len, ndev->cmdctx, 1);
+
+ if (ne != 0) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: ensure reading: read request failed",
+ __func__);
+ del_timer_sync(&ndev->rd_timer);
+ /* make sure that del_timer_sync is done before
+ * we clear rd_outstanding
+ */
+ smp_mb__before_atomic();
+ clear_bit(WAIT_BIT, &ndev->rd_outstanding);
+ return -EIO;
+ }
+ } break;
+
+ case NFDEV_IOCTL_PCI_IFVERS: {
+ int vers, err = -EIO;
+
+ dev_dbg(&ndev->pcidev->dev, "%s: set ifvers", __func__);
+ if ((void *)arg) {
+ err = copy_from_user(&vers, (void __user *)arg,
+ sizeof(vers)) ? -EFAULT : 0;
+ if (err) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: set ifvers: copy from user space failed.",
+ __func__);
+ return err;
+ }
+ } else {
+ dev_err(&ndev->pcidev->dev,
+ "%s ifvers: arg pointer is NULL!",
+ __func__);
+ return err;
+ }
+
+ if (test_bit(WAIT_BIT, &ndev->rd_outstanding)) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: set ifvers: unable to set interface version while read outstanding",
+ __func__);
+ return -EIO;
+ }
+
+ nfp_set_ifvers(ndev, vers);
+ } break;
+
+ case NFDEV_IOCTL_CHUPDATE:
+ dev_err(&ndev->pcidev->dev,
+ "%s: channel update ignored", __func__);
+ break;
+
+ case NFDEV_IOCTL_STATS: {
+ int err = -EIO;
+
+ dev_dbg(&ndev->pcidev->dev, "%s: stats", __func__);
+ if ((void *)arg) {
+ err = copy_to_user((void __user *)arg, &ndev->stats,
+ sizeof(struct nfdev_stats_str))
+ ? -EFAULT : 0;
+ if (err) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: stats: copy to user space failed.",
+ __func__);
+ return err;
+ }
+ } else {
+ dev_err(&ndev->pcidev->dev,
+ "%s stats: arg pointer is NULL!", __func__);
+ return err;
+ }
+ } break;
+
+ case NFDEV_IOCTL_CONTROL: {
+ int err = -EIO;
+ struct nfdev_control_str control;
+
+ dev_dbg(&ndev->pcidev->dev, "%s: control", __func__);
+ if ((void *)arg) {
+ err = copy_from_user(&control, (void __user *)arg,
+ sizeof(control)) ? -EFAULT : 0;
+ if (err) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: control: copy from user space failed.",
+ __func__);
+ return err;
+ }
+ } else {
+ dev_err(&ndev->pcidev->dev,
+ "%s control: arg pointer is NULL!", __func__);
+ return err;
+ }
+ if (!ndev->cmddev->setcontrol) {
+ dev_warn(&ndev->pcidev->dev,
+ "%s: control: set control not supported for this device: ignored",
+ __func__);
+ return -EINVAL;
+ }
+ dev_notice(&ndev->pcidev->dev,
+ "%s: control: updating HSM control register to 0x%x.",
+ __func__,
+ control.control);
+
+ return ndev->cmddev->setcontrol(&control, ndev->cmdctx);
+ } break;
+
+ case NFDEV_IOCTL_STATUS: {
+ int err = -EIO;
+ struct nfdev_status_str status;
+
+ dev_dbg(&ndev->pcidev->dev, "%s: status", __func__);
+
+ if (!ndev->cmddev->getstatus) {
+ dev_warn(&ndev->pcidev->dev,
+ "%s: status not supported for this device: ignored",
+ __func__);
+ return -EINVAL;
+ }
+ err = ndev->cmddev->getstatus(&status,
+ ndev->cmdctx);
+
+ if (err)
+ return err;
+
+ if ((void *)arg) {
+ err = copy_to_user((void __user *)arg, &status,
+ sizeof(status)) ? -EFAULT : 0;
+ if (err) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: status: copy from user space failed.",
+ __func__);
+ return err;
+ }
+ } else {
+ dev_err(&ndev->pcidev->dev,
+ "%s status: arg pointer is NULL!",
+ __func__);
+ return err;
+ }
+ dev_notice(&ndev->pcidev->dev,
+ "%s: read status: 0x%x, error: 0x%02x%02x%02x%02x%02x%02x%02x%02x",
+ __func__,
+ status.status, status.error[0], status.error[1],
+ status.error[2], status.error[3], status.error[4],
+ status.error[5], status.error[6], status.error[7]);
+ } break;
+
+ default: {
+ dev_err(&ndev->pcidev->dev, "%s: unknown ioctl.", __func__);
+ return -EINVAL;
+ } break;
+ }
+
+ return 0;
+}
+
+/**
+ * Performs an NSHIELD SOLO device unlocked IOCTL call.
+ *
+ * @param file device file pointer.
+ * @param cmd command id.
+ * @param arg command argument.
+ * @returns 0 if successful.
+ */
+static long nfp_unlocked_ioctl(struct file *file,
+ u32 cmd,
+ unsigned long arg)
+{
+ long ret;
+ int minor;
+ struct nfp_dev *ndev;
+
+ minor = MINOR(INODE_FROM_FILE(file)->i_rdev);
+ if (minor >= NFP_MAXDEV) {
+ pr_err("%s: minor out of range.", __func__);
+ return -ENODEV;
+ }
+
+ ndev = nfp_dev_list[minor];
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ mutex_lock(&ndev->ioctl_mutex);
+ ret = nfp_ioctl(NULL, file, cmd, arg);
+ mutex_unlock(&ndev->ioctl_mutex);
+
+ dev_dbg(&ndev->pcidev->dev, "%s: left", __func__);
+ return ret;
+}
+
+static irqreturn_t nfp_isr(int irq, void *context)
+{
+ struct nfp_dev *ndev = (struct nfp_dev *)context;
+ int handled;
+ int ne;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return IRQ_NONE;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ ne = ndev->cmddev->isr(ndev->cmdctx, &handled);
+
+ if (ne != 0)
+ dev_err(&ndev->pcidev->dev, "%s: cmddev isr failed (%d)",
+ __func__, ne);
+
+ return IRQ_RETVAL(handled);
+}
+
+/**
+ * Opens an NSHIELD SOLO device.
+ *
+ * The kernel calls this function when a user tries to open an
+ * NSHIELD SOLO device. It is an error to attempt to open an
+ * already opened device.
+ *
+ * @param inode device inode pointer.
+ * @param file device file pointer.
+ * @return 0 if successful.
+ */
+static int nfp_open(struct inode *inode, struct file *file)
+{
+ struct nfp_dev *ndev;
+ int ne;
+ int minor = MINOR(INODE_FROM_FILE(file)->i_rdev);
+
+ /* find ndev */
+
+ if (minor >= NFP_MAXDEV) {
+ pr_err("%s: minor out of range.", __func__);
+ return -ENODEV;
+ }
+
+ ndev = nfp_dev_list[minor];
+ if (!ndev) {
+ pr_err("%s: cannot find dev %d.", __func__, minor);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ dev_notice(&ndev->pcidev->dev,
+ "%s: opening file at %p.", __func__, file);
+
+ /* check if already open */
+
+ if (atomic_read(&ndev->busy)) {
+ dev_err(&ndev->pcidev->dev, "%s: device %s busy", __func__,
+ pci_name(ndev->pcidev));
+ return -EBUSY;
+ }
+ atomic_set(&ndev->busy, 1);
+
+ /* drop any old data */
+
+ clear_bit(0, &ndev->rd_ready);
+
+ /* set interface to module default */
+
+ if (ndev->cmddev->deviceid == PCI_DEVICE_ID_FREESCALE_T1022)
+ nfp_set_ifvers(ndev, NFDEV_IF_PCI_PULL);
+ else
+ nfp_set_ifvers(ndev, NFDEV_IF_STANDARD);
+
+ dev_notice(&ndev->pcidev->dev,
+ "%s: ifvers set to %d", __func__, ndev->ifvers);
+
+ /* open device */
+
+ ne = ndev->cmddev->open(ndev->cmdctx);
+ if (ne != 0) {
+ dev_err(&ndev->pcidev->dev, "%s: device open failed: error %d",
+ __func__, ne);
+ atomic_set(&ndev->busy, 0);
+ return ne;
+ }
+
+ dev_warn(&ndev->pcidev->dev, "%s: device %s open",
+ __func__, pci_name(ndev->pcidev));
+
+ return 0;
+}
+
+/**
+ * Releases an NSHIELD SOLO device.
+ *
+ * The kernel calls this function when a user tries to close an
+ * NSHIELD SOLO device. It is an error to attempt to close an
+ * already closed device.
+ *
+ * @param node device inode pointer.
+ * @param file device file pointer.
+ * @returns 0 if successful.
+ */
+static int nfp_release(struct inode *node, struct file *file)
+{
+ struct nfp_dev *ndev;
+ long timeout;
+ int ne;
+ int minor = MINOR(INODE_FROM_FILE(file)->i_rdev);
+
+ /* find ndev from minor */
+ if (minor >= NFP_MAXDEV) {
+ pr_err("%s: minor out of range.", __func__);
+ return(-ENODEV);
+ }
+
+ ndev = nfp_dev_list[minor];
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ dev_warn(&ndev->pcidev->dev, "%s: closing file at %p.", __func__, file);
+
+ {
+ wait_queue_entry_t wait;
+
+ timeout = 1;
+ init_waitqueue_entry(&wait, current);
+ current->state = TASK_UNINTERRUPTIBLE;
+ add_wait_queue(&ndev->rd_queue, &wait);
+ if (test_bit(WAIT_BIT, &ndev->rd_outstanding)) {
+ dev_dbg(&ndev->pcidev->dev,
+ "%s: read outstanding", __func__);
+ timeout = schedule_timeout(NFP_TIMEOUT);
+ dev_dbg(&ndev->pcidev->dev,
+ "%s: finished waiting", __func__);
+ }
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&ndev->rd_queue, &wait);
+ if (!timeout) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: outstanding read timed out", __func__);
+ }
+ }
+
+ atomic_set(&ndev->busy, 1);
+ if (test_bit(WAIT_BIT, &ndev->rd_outstanding)) {
+ del_timer_sync(&ndev->rd_timer);
+ /* make sure that del_timer_sync is done before
+ * we clear rd_outstanding
+ */
+ smp_mb__before_atomic();
+ clear_bit(WAIT_BIT, &ndev->rd_outstanding);
+ }
+ atomic_set(&ndev->busy, 0);
+
+ /* close device */
+
+ ne = ndev->cmddev->close(ndev->cmdctx);
+ if (ne != 0) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: device close failed", __func__);
+ return ne;
+ }
+
+ return(0);
+}
+
+/**
+ * NSHIELD SOLO character device file operations table.
+ */
+static const struct file_operations nfp_fops = { .owner = THIS_MODULE,
+ .poll = nfp_poll,
+ .write = nfp_write,
+ .read = nfp_read,
+ .unlocked_ioctl = nfp_unlocked_ioctl,
+ .open = nfp_open,
+ .release = nfp_release,
+};
+
+/**
+ * @addtogroup devmgr
+ * NSHIELD SOLO device management.
+ * @{
+ */
+
+/* device setup -------------------------------------------------- */
+
+static void nfp_dev_destroy(struct nfp_dev *ndev, struct pci_dev *pci_dev)
+{
+ int i;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return;
+ }
+
+ dev_dbg(&ndev->pcidev->dev, "%s: entered", __func__);
+ if (ndev) {
+ nfp_free_pci_push(ndev);
+ nfp_free_pci_pull(ndev);
+
+ if (ndev->irq) {
+ dev_notice(&ndev->pcidev->dev, "%s: freeing irq, %x",
+ __func__, ndev->irq);
+ free_irq(ndev->irq, ndev);
+ }
+ for (i = 0; i < 6; i++)
+ if (ndev->bar[i]) {
+ dev_notice(&ndev->pcidev->dev,
+ "%s: freeing MEM BAR, %d",
+ __func__, i);
+ release_mem_region(pci_resource_start(pci_dev,
+ i),
+ pci_resource_len(pci_dev,
+ i));
+ iounmap(ndev->bar[i]);
+ }
+ dev_notice(&ndev->pcidev->dev, "%s: freeing ndev", __func__);
+ kfree(ndev);
+ }
+}
+
+static int nfp_setup(const struct nfpcmd_dev *cmddev, u8 bus, u8 slot,
+ u32 bar[6], u32 irq_line, struct pci_dev *pcidev)
+{
+ struct nfp_dev *ndev = 0;
+ int ne;
+ int i;
+
+ dev_warn(&pcidev->dev,
+ "%s: Found '%s' at bus %x, slot %x, irq %d.",
+ __func__, cmddev->name, bus, slot, irq_line);
+
+ if (nfp_num_devices >= NFP_MAXDEV) {
+ dev_err(&pcidev->dev,
+ "%s: minor out of range.", __func__);
+ goto fail_continue;
+ }
+
+ ndev = kzalloc(sizeof(*ndev), GFP_KERNEL);
+ if (!ndev) {
+ /* logged by the allocator */
+ goto fail_continue;
+ }
+ dev_warn(&pcidev->dev,
+ "%s: allocated device structure.", __func__);
+
+ ndev->busno = bus;
+ ndev->pcidev = pcidev;
+ ndev->slotno = slot;
+ ndev->cmddev = cmddev;
+
+ for (i = 0; i < NFP_BARSIZES_COUNT; i++) {
+ int map_bar_size = cmddev->bar_sizes[i] & NFP_BARSIZES_MASK;
+ int bar_flags = cmddev->bar_sizes[i] & ~NFP_BARSIZES_MASK;
+
+ if (map_bar_size) {
+ if (!request_mem_region(pci_resource_start(pcidev, i),
+ pci_resource_len(pcidev, i),
+ cmddev->name)) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: request_mem_region failed, %llx %llx %d (%s)",
+ __func__,
+ pci_resource_start(pcidev, i),
+ pci_resource_len(pcidev, i), i,
+ cmddev->name);
+ goto fail_continue;
+ }
+
+ if (bar_flags & PCI_BASE_ADDRESS_SPACE_PREFETCHABLE) {
+ ndev->bar[i] =
+ ioremap(bar[i], map_bar_size);
+ } else {
+ ndev->bar[i] =
+ ioremap_nocache(bar[i], map_bar_size);
+ }
+
+ if (!ndev->bar[i]) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: unable to map memory BAR %d, (0x%x).",
+ __func__, i, bar[i]);
+ goto fail_continue;
+ }
+ }
+ }
+
+ mutex_init(&ndev->ioctl_mutex);
+
+ init_waitqueue_head(&ndev->wr_queue);
+ init_waitqueue_head(&ndev->rd_queue);
+
+ set_bit(0, &ndev->wr_ready);
+
+ ne = ndev->cmddev->create(ndev);
+ if (ne != 0) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: failed to create command device (%d)",
+ __func__, ne);
+ goto fail_continue;
+ }
+
+ if (request_irq(irq_line, nfp_isr, IRQF_SHARED, cmddev->name, ndev)) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: unable to claim interrupt.", __func__);
+ goto fail_continue;
+ }
+ ndev->irq = irq_line;
+
+ memset(&ndev->stats, 0, sizeof(ndev->stats));
+
+ pci_set_drvdata(pcidev, ndev);
+
+ /* setup timeout timer */
+ timer_setup(&ndev->rd_timer, nfp_read_timeout, 0);
+ mod_timer(&ndev->rd_timer, jiffies + (NFP_TIMEOUT_SEC * HZ));
+
+ nfp_dev_list[nfp_num_devices] = ndev;
+ device_create(nfp_class, NULL, /* parent */
+ MKDEV(NFP_MAJOR, nfp_num_devices), NULL, /* drvdata */
+ "nshield_solo%d", nfp_num_devices);
+ dev_warn(&ndev->pcidev->dev, "%s: nfp_num_devices= %d, ndev = %p.",
+ __func__, nfp_num_devices, ndev);
+ nfp_num_devices++;
+ return 1;
+
+fail_continue:
+ nfp_dev_destroy(ndev, pcidev);
+
+ return 0;
+}
+
+/* device probing ---------------------------------------------------------- */
+
+/**
+ * Adds a PCI device to the module. The PCI subsystem calls this function
+ * when a PCI device is found.
+ *
+ * @param pcidev PCI device.
+ * @param id PCI device ids.
+ * @returns 0 if successful.
+ */
+static int nfp_pci_probe(struct pci_dev *pcidev,
+ struct pci_device_id const *id)
+{
+ int i;
+ u32 bar[6];
+ const struct nfpcmd_dev *nfp_drvlist[] = { &i21555_cmddev,
+ &fsl_t1022_cmddev, NULL };
+ const struct nfpcmd_dev *cmddev = nfp_drvlist[id->driver_data];
+ u64 iosize;
+ u32 irq_line;
+ int pos = 0u;
+ int err = 0;
+
+ if (!pcidev || !id) {
+ pr_err("%s: pcidev or id was NULL!", __func__);
+ return -ENODEV;
+ }
+
+ dev_notice(&pcidev->dev, "%s: probing PCI device %s",
+ __func__, pci_name(pcidev));
+
+ /* enable the device */
+ err = pci_enable_device(pcidev);
+ if (err) {
+ dev_err(&pcidev->dev, "%s: pci_enable_device failed", __func__);
+ err = -ENODEV;
+ goto probe_err;
+ }
+
+ pci_set_master(pcidev);
+
+ /* save PCI device info */
+ irq_line = pcidev->irq;
+ for (i = 0; i < NFP_BARSIZES_COUNT; ++i) {
+ iosize = cmddev->bar_sizes[i] & NFP_BARSIZES_MASK;
+ if (pci_resource_len(pcidev, i) < iosize) {
+ dev_err(&pcidev->dev,
+ "%s: %s region request overflow: bar %d, requested %llx, maximum %llx",
+ __func__, pci_name(pcidev), i, iosize,
+ pci_resource_len(pcidev, i));
+ err = -ENODEV;
+ goto probe_err;
+ }
+ bar[i] = pci_resource_start(pcidev, i);
+ }
+
+ if (cmddev->flags & NFP_CMD_FLG_NEED_MSI) {
+ pos = pci_find_capability(pcidev, PCI_CAP_ID_MSI);
+ if (!pos) {
+ dev_err(&pcidev->dev, "%s: %s MSI not supported",
+ __func__, pci_name(pcidev));
+ err = -ENODEV;
+ goto probe_err;
+ }
+ dev_err(&pcidev->dev, "%s: %s MSI support at %d",
+ __func__, pci_name(pcidev), pos);
+
+ err = pci_enable_msi(pcidev);
+ if (err) {
+ dev_err(&pcidev->dev,
+ "%s: %s unable to enable MSI",
+ __func__, pci_name(pcidev));
+ goto probe_err;
+ }
+
+ /* IRQ vector changes if MSI is enabled. */
+ irq_line = pcidev->irq;
+ dev_notice(&pcidev->dev, "%s: %s MSI IRQ at %d",
+ __func__, pci_name(pcidev), irq_line);
+ }
+
+ dev_warn(&pcidev->dev, "%s: devname %s, slotname %s, busname %s",
+ __func__, "", pci_name(pcidev), pcidev->bus->name);
+
+ err = nfp_setup(cmddev, pcidev->bus->number, PCI_SLOT(pcidev->devfn),
+ bar, irq_line, pcidev);
+ if (!err) {
+ err = -ENODEV;
+ goto probe_err;
+ }
+
+ return 0;
+
+probe_err:
+ pci_disable_msi(pcidev);
+ pci_clear_master(pcidev);
+ pci_disable_device(pcidev);
+ return err;
+}
+
+/**
+ * Removes a PCI device from the module. The PCI subsystem calls this function
+ * when a PCI device is removed.
+ *
+ * @param pcidev PCI device.
+ * @returns 0 if successful.
+ */
+static void nfp_pci_remove(struct pci_dev *pcidev)
+{
+ int index;
+ struct nfp_dev *ndev;
+
+ dev_err(&pcidev->dev, "%s: removing PCI device %s",
+ __func__, pci_name(pcidev));
+
+ /* find existing device */
+
+ ndev = pci_get_drvdata(pcidev);
+ if (!ndev) {
+ dev_err(&pcidev->dev,
+ "%s: no NSHIELD SOLO device associated with this PCI device",
+ __func__);
+ return;
+ }
+
+ /* destroy common device */
+
+ if (ndev->cmddev)
+ ndev->cmddev->destroy(ndev->cmdctx);
+
+ nfp_dev_destroy(ndev, pcidev);
+
+ pci_disable_msi(pcidev);
+ pci_clear_master(pcidev);
+ pci_disable_device(pcidev);
+
+ index = 0;
+ while (index < NFP_MAXDEV) {
+ if (nfp_dev_list[index] == ndev) {
+ nfp_dev_list[index] = NULL;
+ device_destroy(nfp_class, MKDEV(NFP_MAJOR, index));
+ }
+ index++;
+ }
+}
+
+/**
+ * PCI device ID table. We use the driver_data field to hold an index into
+ * nfp_drvlist, so bear than in mind when editing either.
+ */
+static struct pci_device_id nfp_pci_tbl[] = {
+ {
+ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_21555,
+ PCI_VENDOR_ID_NCIPHER, PCI_SUBSYSTEM_ID_NFAST_REV1, 0,
+ 0, /* Ignore class */
+ 0 /* Index into nfp_drvlist */
+ },
+ {
+ PCI_VENDOR_ID_FREESCALE, PCI_DEVICE_ID_FREESCALE_T1022,
+ PCI_VENDOR_ID_NCIPHER, PCI_SUBSYSTEM_ID_NFAST_REV1, 0,
+ 0, /* Ignore class */
+ 1 /* Index into nfp_drvlist */
+ },
+ {
+ 0,
+ } /* terminate list */
+};
+MODULE_DEVICE_TABLE(pci, nfp_pci_tbl);
+
+/**
+ * PCI driver operations.
+ */
+static struct pci_driver nfp_pci_driver = { .name = "nshield_solo",
+ .probe = nfp_pci_probe,
+ .remove = nfp_pci_remove,
+ .id_table = nfp_pci_tbl };
+
+/*--------------------*/
+/* init */
+/*--------------------*/
+
+static int nfp_init(void)
+{
+ int index;
+
+ pr_info("%s: entered", __func__);
+
+ if (register_chrdev(NFP_MAJOR, NFP_DRVNAME, &nfp_fops)) {
+ pr_err("unable to get major for nshield_solo device.");
+ return -EIO;
+ }
+
+ for (index = 0; index < NFP_MAXDEV; index++)
+ nfp_dev_list[index] = NULL;
+
+ nfp_class = class_create(THIS_MODULE, "nshield_solo");
+ if (IS_ERR(nfp_class)) {
+ pr_err("%s: failed to create a class for this device, err = %ld",
+ __func__, PTR_ERR(nfp_class));
+ return -EIO;
+ }
+
+ index = 0;
+ return pci_register_driver(&nfp_pci_driver);
+}
+
+/** @} */
+
+/**
+ * Initializes this NSHIELD SOLO kernel module.
+ */
+static int __init nfp_module_init(void)
+{
+ int err;
+
+ pr_err("%s: inserting nshield_solo module", __func__);
+
+ err = nfp_init();
+
+ return err;
+}
+
+/**
+ * Exits this NSHIELD SOLO kernel module.
+ */
+static void __exit nfp_module_exit(void)
+{
+ pr_notice("%s: removing nshield_solo module", __func__);
+
+ /* unregister pci driver */
+
+ pci_unregister_driver(&nfp_pci_driver);
+ /* ... which triggers device removals */
+
+ class_destroy(nfp_class);
+
+ unregister_chrdev(NFP_MAJOR, NFP_DRVNAME);
+ pr_notice("%s: removed nshield_solo module", __func__);
+}
+
+module_init(nfp_module_init);
+module_exit(nfp_module_exit);
+
+/* end of file */
diff --git a/drivers/misc/ncipher/i21555.c b/drivers/misc/ncipher/i21555.c
new file mode 100644
index 000000000000..29ff6d10b2ea
--- /dev/null
+++ b/drivers/misc/ncipher/i21555.c
@@ -0,0 +1,553 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *
+ * i21555.c: nCipher PCI HSM intel 21555 command driver
+ * Copyright 2019 nCipher Security Ltd
+ *
+ */
+
+#include "solo.h"
+#include "i21555.h"
+
+/* pci fixed length accessors. ----------------------------------
+ * The below functions are used predominantly
+ * to access CSR registers in pci memory space.
+ */
+static u32 nfp_inl(struct nfp_dev *ndev, int bar, int offset)
+{
+ dev_dbg(&ndev->pcidev->dev,
+ "%s: addr %p", __func__, ndev->bar[bar] + offset);
+ return le32_to_cpu(ioread32(ndev->bar[bar] + offset));
+}
+
+static u16 nfp_inw(struct nfp_dev *ndev, int bar, int offset)
+{
+ dev_dbg(&ndev->pcidev->dev,
+ "%s: addr %p", __func__, ndev->bar[bar] + offset);
+ return le16_to_cpu(ioread16(ndev->bar[bar] + offset));
+}
+
+static void nfp_outl(struct nfp_dev *ndev, int bar, int offset, u32 data)
+{
+ dev_dbg(&ndev->pcidev->dev, "%s: addr %p, data %x",
+ __func__, ndev->bar[bar] + offset, data);
+ iowrite32(cpu_to_le32(data), ndev->bar[bar] + offset);
+}
+
+static void nfp_outw(struct nfp_dev *ndev, int bar, int offset, u16 data)
+{
+ dev_dbg(&ndev->pcidev->dev, "%s: addr %p, data %x",
+ __func__, ndev->bar[bar] + offset, data);
+ iowrite16(cpu_to_le16(data), ndev->bar[bar] + offset);
+}
+
+static int nfp_config_inl(struct nfp_dev *ndev, int offset, u32 *res)
+{
+ if (!ndev || !ndev->pcidev)
+ return -ENODEV;
+ pci_read_config_dword(ndev->pcidev, offset, res);
+ return 0;
+}
+
+/* started ------------------------------------------------------
+ *
+ * Check that device is ready to talk, by checking that
+ * the i21555 has master enabled on its secondary interface
+ */
+
+static int i21555_started(struct nfp_dev *ndev)
+{
+ u32 tmp32;
+ int ne;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_info(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ ne = nfp_config_inl(ndev, I21555_CFG_SEC_CMD_STATUS, &tmp32);
+ if (ne != 0) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: nfp_config_inl failed", __func__);
+ return ne;
+ }
+
+ tmp32 = le32_to_cpu(tmp32) & 0xffff;
+
+ if (tmp32 & CFG_CMD_MASTER) {
+ dev_notice(&ndev->pcidev->dev,
+ "%s: Yes %x", __func__, tmp32);
+ } else {
+ dev_err(&ndev->pcidev->dev, "%s: device not started yet %x",
+ __func__, tmp32);
+ ne = -EAGAIN;
+ }
+ return ne;
+}
+
+/* create ------------------------------------------------------- */
+
+static int i21555_create(struct nfp_dev *ndev)
+{
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_info(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ /* set our context to just be a pointer to our struct nfp_dev */
+ ndev->cmdctx = ndev;
+
+ if (!ndev->bar[CSR_BAR]) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: null BAR[%d]", __func__, CSR_BAR);
+ return -ENOMEM;
+ }
+ dev_warn(&ndev->pcidev->dev, "%s: enable doorbell", __func__);
+ nfp_outl(ndev, CSR_BAR, I21555_OFFSET_DOORBELL_PRI_SET_MASK,
+ I21555_DOORBELL_PRI_ENABLE);
+ nfp_outl(ndev, CSR_BAR, I21555_OFFSET_DOORBELL_PRI_CLEAR_MASK,
+ I21555_DOORBELL_PRI_ENABLE);
+ return 0;
+}
+
+/* stop ------------------------------------------------------- */
+
+static int i21555_destroy(struct nfp_dev *ctx)
+{
+ struct nfp_dev *ndev = ctx;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_info(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ if (!ndev) {
+ dev_err(&ndev->pcidev->dev, "%s: NULL ndev", __func__);
+ return -ENODEV;
+ }
+ if (!ndev->bar[CSR_BAR]) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: null BAR[%d]", __func__, CSR_BAR);
+ return -ENOMEM;
+ }
+ nfp_outl(ndev, CSR_BAR, I21555_OFFSET_DOORBELL_PRI_SET_MASK,
+ I21555_DOORBELL_PRI_DISABLE);
+ nfp_outl(ndev, CSR_BAR, I21555_OFFSET_DOORBELL_PRI_CLEAR_MASK,
+ I21555_DOORBELL_PRI_DISABLE);
+
+ return 0;
+}
+
+/* open ------------------------------------------------------- */
+
+static int i21555_open(struct nfp_dev *ctx)
+{
+ struct nfp_dev *ndev = ctx;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_info(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ return 0;
+}
+
+/* close ------------------------------------------------------- */
+
+static int i21555_close(struct nfp_dev *ctx)
+{
+ struct nfp_dev *ndev = ctx;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_info(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ return 0;
+}
+
+/* isr ------------------------------------------------------- */
+
+static int i21555_isr(struct nfp_dev *ctx, int *handled)
+{
+ struct nfp_dev *ndev = ctx;
+ u16 doorbell;
+ u16 tmp16;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_info(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ *handled = 0;
+
+ ndev->stats.isr++;
+
+ if (!ndev->bar[CSR_BAR]) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: null BAR[%d]", __func__, CSR_BAR);
+ return -ENOMEM;
+ }
+
+ /* This interrupt may not be from our module, so check that it
+ * actually is us before handling it.
+ */
+ doorbell = nfp_inw(ndev, CSR_BAR, I21555_OFFSET_DOORBELL_PRI_SET);
+ while (doorbell && doorbell != 0xffff) {
+ *handled = 1;
+ /* service interrupts */
+ if (doorbell & (NFAST_INT_DEVICE_WRITE_OK |
+ NFAST_INT_DEVICE_WRITE_FAILED)) {
+ ndev->stats.isr_write++;
+ tmp16 = (NFAST_INT_DEVICE_WRITE_OK |
+ NFAST_INT_DEVICE_WRITE_FAILED);
+ nfp_outw(ndev, CSR_BAR,
+ I21555_OFFSET_DOORBELL_PRI_CLEAR, tmp16);
+
+ dev_warn(&ndev->pcidev->dev,
+ "%s: write done interrupt, ok = %d.", __func__,
+ doorbell & NFAST_INT_DEVICE_WRITE_OK ? 1 : 0);
+
+ nfp_write_complete(ndev, doorbell &
+ NFAST_INT_DEVICE_WRITE_OK ? 1 : 0);
+ }
+
+ if (doorbell &
+ (NFAST_INT_DEVICE_READ_OK |
+ NFAST_INT_DEVICE_READ_FAILED)) {
+ ndev->stats.isr_read++;
+ tmp16 = (NFAST_INT_DEVICE_READ_OK |
+ NFAST_INT_DEVICE_READ_FAILED);
+ nfp_outw(ndev, CSR_BAR,
+ I21555_OFFSET_DOORBELL_PRI_CLEAR, tmp16);
+
+ dev_warn(&ndev->pcidev->dev,
+ "%s: read ack interrupt, ok = %d.", __func__,
+ doorbell & NFAST_INT_DEVICE_READ_OK ? 1 : 0);
+ nfp_read_complete(ndev, doorbell &
+ NFAST_INT_DEVICE_READ_OK ? 1 : 0);
+ }
+
+ if (doorbell &
+ ~(NFAST_INT_DEVICE_READ_OK | NFAST_INT_DEVICE_READ_FAILED |
+ NFAST_INT_DEVICE_WRITE_OK |
+ NFAST_INT_DEVICE_WRITE_FAILED)) {
+ nfp_outw(ndev, CSR_BAR,
+ I21555_OFFSET_DOORBELL_PRI_CLEAR, doorbell);
+ dev_err(&ndev->pcidev->dev, "%s: unexpected interrupt %x",
+ __func__, doorbell);
+ }
+ doorbell = nfp_inw(ndev, CSR_BAR,
+ I21555_OFFSET_DOORBELL_PRI_SET);
+ }
+ dev_notice(&ndev->pcidev->dev, "%s: exiting", __func__);
+ return 0;
+}
+
+/* write ------------------------------------------------------- */
+
+static int i21555_write(u32 addr, const char *block, int len,
+ struct nfp_dev *ctx)
+{
+ struct nfp_dev *ndev = ctx;
+ __le32 hdr[2];
+ int ne;
+ u16 tmp16;
+ __le32 tmp32;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_info(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ ndev->stats.write_fail++;
+
+ if (!ndev->bar[CSR_BAR]) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: null BAR[%d]", __func__, CSR_BAR);
+ return -ENOMEM;
+ }
+
+ ne = i21555_started(ndev);
+ if (ne != 0) {
+ if (ne != -EAGAIN) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: i21555_started failed", __func__);
+ }
+ return ne;
+ }
+
+ dev_notice(&ndev->pcidev->dev, "%s: ndev->bar[ MEMBAR2 ]= %p",
+ __func__, ndev->bar[MEMBAR2]);
+ dev_notice(&ndev->pcidev->dev, "%s: ndev->bar[ CSR_BAR ]= %p",
+ __func__, ndev->bar[CSR_BAR]);
+ dev_notice(&ndev->pcidev->dev, "%s: block len %d", __func__, len);
+
+ /* send write request */
+
+ ne = copy_from_user(ndev->bar[MEMBAR2] + NFPCI_JOBS_WR_DATA,
+ block, len) ? -EFAULT : 0;
+ if (ne != 0) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: copy_from_user failed", __func__);
+ return ne;
+ }
+ hdr[0] = cpu_to_le32(NFPCI_JOB_CONTROL);
+ hdr[1] = cpu_to_le32(len);
+ memcpy(ndev->bar[MEMBAR2] + NFPCI_JOBS_WR_CONTROL,
+ (const char *)hdr, 2 * sizeof(hdr[0]));
+
+ /* confirm write request */
+
+ memcpy((char *)hdr, ndev->bar[MEMBAR2] + NFPCI_JOBS_WR_LENGTH,
+ sizeof(hdr[0]));
+ tmp32 = cpu_to_le32(len);
+ if (hdr[0] != tmp32) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: length not written", __func__);
+ return -EIO;
+ }
+
+ tmp16 = NFAST_INT_HOST_WRITE_REQUEST >> 16;
+ nfp_outw(ndev, CSR_BAR, I21555_OFFSET_DOORBELL_SEC_SET, tmp16);
+
+ ndev->stats.write_fail--;
+ ndev->stats.write_block++;
+ ndev->stats.write_byte += len;
+
+ dev_warn(&ndev->pcidev->dev, "%s: done", __func__);
+ return 0;
+}
+
+/* read ------------------------------------------------------- */
+
+static int i21555_read(char *block, int len, struct nfp_dev *ctx, int *rcount)
+{
+ struct nfp_dev *ndev = ctx;
+ int ne;
+ int count;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_info(&ndev->pcidev->dev, "%s: entered", __func__);
+ *rcount = 0;
+
+ ndev->stats.read_fail++;
+
+ if (!ndev->bar[CSR_BAR]) {
+ dev_err(&ndev->pcidev->dev, "%s: null BAR[%d]",
+ __func__, CSR_BAR);
+ return -ENOMEM;
+ }
+
+ ne = i21555_started(ndev);
+ if (ne != 0) {
+ if (ne != -EAGAIN)
+ dev_err(&ndev->pcidev->dev,
+ "%s: i21555_started failed", __func__);
+
+ return ne;
+ }
+
+ memcpy((char *)&count, ndev->bar[MEMBAR2] + NFPCI_JOBS_RD_LENGTH,
+ sizeof(count));
+ count = le32_to_cpu(count);
+ if (count < 0 || count > len) {
+ dev_err(&ndev->pcidev->dev, "%s: bad byte count (%d) from device",
+ __func__, count);
+ return -EIO;
+ }
+ ne = copy_to_user(block, ndev->bar[MEMBAR2] + NFPCI_JOBS_RD_DATA,
+ count) ? -EFAULT : 0;
+ if (ne != 0) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: copy_to_user failed", __func__);
+ return ne;
+ }
+ dev_warn(&ndev->pcidev->dev, "%s: done", __func__);
+ *rcount = count;
+ ndev->stats.read_fail--;
+ ndev->stats.read_block++;
+ ndev->stats.read_byte += len;
+ return 0;
+}
+
+/* ensure reading -------------------------------------------------- */
+
+static int i21555_ensure_reading(dma_addr_t addr,
+ int len, struct nfp_dev *ctx, int lock_flag)
+{
+ struct nfp_dev *ndev = ctx;
+ __le32 hdr[3];
+ u16 tmp16;
+ __le32 tmp32;
+ int ne;
+ int hdr_len;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_info(&ndev->pcidev->dev, "%s: entered", __func__);
+
+ ndev->stats.ensure_fail++;
+
+ if (!ndev->bar[CSR_BAR]) {
+ dev_err(&ndev->pcidev->dev, "%s: null BAR[%d]",
+ __func__, CSR_BAR);
+ return -ENOMEM;
+ }
+
+ ne = i21555_started(ndev);
+ if (ne != 0) {
+ if (ne != -EAGAIN) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: i21555_started failed", __func__);
+ }
+ return ne;
+ }
+
+ dev_notice(&ndev->pcidev->dev, "%s: ndev->bar[ MEMBAR2 ]= %p", __func__,
+ ndev->bar[MEMBAR2]);
+ dev_notice(&ndev->pcidev->dev, "%s: ndev->bar[ CSR_BAR ]= %p", __func__,
+ ndev->bar[CSR_BAR]);
+
+ /* send read request */
+
+ if (addr) {
+ dev_notice(&ndev->pcidev->dev, "%s: new format, addr %p",
+ __func__, (void *)addr);
+ hdr[0] = cpu_to_le32(NFPCI_JOB_CONTROL_PCI_PUSH);
+ hdr[1] = cpu_to_le32(len);
+ hdr[2] = cpu_to_le32(addr);
+ hdr_len = 3 * sizeof(hdr[0]);
+ } else {
+ hdr[0] = cpu_to_le32(NFPCI_JOB_CONTROL);
+ hdr[1] = cpu_to_le32(len);
+ hdr_len = 2 * sizeof(hdr[0]);
+ }
+
+ memcpy(ndev->bar[MEMBAR2] + NFPCI_JOBS_RD_CONTROL,
+ (const char *)hdr, hdr_len);
+
+ /* confirm read request */
+
+ memcpy((char *)hdr, ndev->bar[MEMBAR2] + NFPCI_JOBS_RD_LENGTH,
+ sizeof(hdr[0]));
+ tmp32 = cpu_to_le32(len);
+ if (hdr[0] != tmp32) {
+ dev_err(&ndev->pcidev->dev, "%s: len not written", __func__);
+ return -EIO;
+ }
+
+ tmp16 = NFAST_INT_HOST_READ_REQUEST >> 16;
+ nfp_outw(ndev, CSR_BAR, I21555_OFFSET_DOORBELL_SEC_SET, tmp16);
+
+ ndev->stats.ensure_fail--;
+ ndev->stats.ensure++;
+
+ return 0;
+}
+
+/* set control register ----------------------------------------- */
+
+static int i21555_set_control(const struct nfdev_control_str *control,
+ struct nfp_dev *ctx)
+{
+ struct nfp_dev *ndev = ctx;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_info(&ndev->pcidev->dev, "%s: entered", __func__);
+ if (!ndev->bar[CSR_BAR]) {
+ dev_err(&ndev->pcidev->dev, "%s: null BAR[%d]",
+ __func__, CSR_BAR);
+ return -ENOMEM;
+ }
+ nfp_outl(ndev, CSR_BAR, I21555_SCRATCHPAD_REGISTER_CONTROL,
+ control->control);
+ return 0;
+}
+
+/* get status/error registers ----------------------------------- */
+
+static int i21555_get_status(struct nfdev_status_str *status,
+ struct nfp_dev *ctx)
+{
+ struct nfp_dev *ndev = ctx;
+ u32 *error = (u32 *)status->error;
+
+ /* check for device */
+ if (!ndev) {
+ pr_err("%s: error: no device", __func__);
+ return -ENODEV;
+ }
+
+ dev_info(&ndev->pcidev->dev, "%s: entered", __func__);
+ if (!ndev->bar[CSR_BAR]) {
+ dev_err(&ndev->pcidev->dev,
+ "%s: null BAR[%d]", __func__, CSR_BAR);
+ return -ENOMEM;
+ }
+ status->status = nfp_inl(ndev,
+ CSR_BAR, I21555_SCRATCHPAD_REGISTER_STATUS);
+ error[0] = nfp_inl(ndev, CSR_BAR, I21555_SCRATCHPAD_REGISTER_ERROR_LO);
+ error[1] = nfp_inl(ndev, CSR_BAR, I21555_SCRATCHPAD_REGISTER_ERROR_HI);
+ return 0;
+}
+
+/* command device structure ------------------------------------- */
+
+const struct nfpcmd_dev i21555_cmddev = {
+ .name = "nCipher nShield Solo",
+ .vendorid = PCI_VENDOR_ID_INTEL,
+ .deviceid = PCI_DEVICE_ID_INTEL_21555,
+ .sub_vendorid = PCI_VENDOR_ID_NCIPHER,
+ .sub_deviceid = PCI_SUBSYSTEM_ID_NFAST_REV1,
+ .bar_sizes = BAR_SIZES,
+ .flags = 0,
+ .max_ifvers = NFDEV_IF_PCI_PUSH,
+ .create = i21555_create,
+ .destroy = i21555_destroy,
+ .open = i21555_open,
+ .close = i21555_close,
+ .isr = i21555_isr,
+ .write_block = i21555_write,
+ .read_block = i21555_read,
+ .ensure_reading = i21555_ensure_reading,
+ .setcontrol = i21555_set_control,
+ .getstatus = i21555_get_status,
+};
+
+/* end of file */
diff --git a/drivers/misc/ncipher/i21555.h b/drivers/misc/ncipher/i21555.h
new file mode 100644
index 000000000000..e4794d21a428
--- /dev/null
+++ b/drivers/misc/ncipher/i21555.h
@@ -0,0 +1,68 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ *
+ * Interfaces to the Solo's Intel 21555 bridge
+ * Copyright 2019 nCipher Security Ltd
+ *
+ */
+
+#ifndef NFP_I21555_H
+#define NFP_I21555_H
+
+#include "solo.h"
+
+#ifndef PCI_VENDOR_ID_INTEL
+#define PCI_VENDOR_ID_INTEL 0x8086
+#endif
+
+#ifndef PCI_DEVICE_ID_INTEL_21555
+#define PCI_DEVICE_ID_INTEL_21555 0xb555
+#endif
+
+#ifndef PCI_VENDOR_ID_NCIPHER
+#define PCI_VENDOR_ID_NCIPHER 0x0100
+#endif
+
+#ifndef PCI_SUBSYSTEM_ID_NFAST_REV1
+#define PCI_SUBSYSTEM_ID_NFAST_REV1 0x0100
+#endif
+
+#define I21555_OFFSET_DOORBELL_PRI_SET 0x9C
+#define I21555_OFFSET_DOORBELL_SEC_SET 0x9E
+#define I21555_OFFSET_DOORBELL_PRI_CLEAR 0x98
+
+#define I21555_OFFSET_DOORBELL_PRI_SET_MASK 0xA4
+#define I21555_OFFSET_DOORBELL_PRI_CLEAR_MASK 0xA0
+
+#define I21555_DOORBELL_PRI_ENABLE 0x0000
+#define I21555_DOORBELL_PRI_DISABLE 0xFFFF
+
+/* 8 32-bit scratchpad registers start here; bridge manual section 11.4 */
+#define I21555_SCRATCHPAD_REGISTER(n) (0xA8 + 4 * (n))
+
+/* Scratchpad register assignments */
+#define I21555_SCRATCHPAD_REGISTER_CONTROL I21555_SCRATCHPAD_REGISTER(0)
+#define I21555_SCRATCHPAD_REGISTER_STATUS I21555_SCRATCHPAD_REGISTER(1)
+#define I21555_SCRATCHPAD_REGISTER_ERROR_LO I21555_SCRATCHPAD_REGISTER(2)
+#define I21555_SCRATCHPAD_REGISTER_ERROR_HI I21555_SCRATCHPAD_REGISTER(3)
+
+#define I21555_CFG_SEC_CMD_STATUS 0x44
+
+#define CFG_CMD_MASTER 0x0004
+
+#define MEMBAR1 0
+#define MEMBAR2 2
+
+/* lower 4k of BAR0 map the 21555 CSRs (doorbell IRQs etc) */
+#define MEMBAR1_SIZE 4096
+
+#define CSR_BAR MEMBAR1
+#define BAR_SIZES {MEMBAR1_SIZE, \
+ 0, \
+ NFPCI_RAM_MINSIZE_JOBS | \
+ PCI_BASE_ADDRESS_SPACE_PREFETCHABLE, \
+ 0, \
+ 0, \
+ 0}
+
+#endif /* NFP_I21555_H */
diff --git a/drivers/misc/ncipher/solo.h b/drivers/misc/ncipher/solo.h
new file mode 100644
index 000000000000..5240805e6610
--- /dev/null
+++ b/drivers/misc/ncipher/solo.h
@@ -0,0 +1,316 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ *
+ * solo.h: nCipher PCI HSM interface
+ * Copyright 2019 nCipher Security Ltd
+ *
+ * Declares the nFast PCI register interface, driver runtime
+ * structures, and supporting items.
+ *
+ * The interface presented by nFast PCI devices consists of:
+ *
+ * - a region of shared RAM used for data transfer & control information
+ * - a doorbell interrupt register, so both sides can give each other
+ * interrupts
+ * - a number of DMA channels for transferring data
+ *
+ */
+
+#ifndef SOLO_H
+#define SOLO_H
+
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/time.h>
+#include <linux/io.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/poll.h>
+#include <linux/mutex.h>
+#include <linux/nshield_solo.h>
+
+/* Sizes of some regions */
+
+/*
+ * This is the minimum size of shared RAM. In future it may be possible to
+ * negotiate larger sizes of shared RAM or auto-detect how big it is
+ */
+#define NFPCI_RAM_MINSIZE 0x00100000
+#define NFPCI_RAM_MINSIZE_JOBS 0x00020000 /* standard jobs only */
+#define NFPCI_RAM_MINSIZE_KERN 0x00040000 /* standard and
+ * kernel jobs
+ */
+
+/* Offsets within shared memory space.
+ * The following main regions are:
+ * jobs input area
+ * jobs output area
+ * kernel jobs input area
+ * kernel output area
+ */
+
+#define NFPCI_OFFSET_JOBS 0x00000000
+#define NFPCI_OFFSET_JOBS_WR 0x00000000
+#define NFPCI_OFFSET_JOBS_RD 0x00010000
+#define NFPCI_OFFSET_KERN 0x00020000
+#define NFPCI_OFFSET_KERN_WR 0x00020000
+#define NFPCI_OFFSET_KERN_RD 0x00030000
+
+/* Interrupts, defined by bit position in doorbell register */
+
+/* Interrupts from device to host */
+#define NFAST_INT_DEVICE_WRITE_OK 0x00000001
+#define NFAST_INT_DEVICE_WRITE_FAILED 0x00000002
+#define NFAST_INT_DEVICE_READ_OK 0x00000004
+#define NFAST_INT_DEVICE_READ_FAILED 0x00000008
+#define NFAST_INT_DEVICE_KERN_WRITE_OK 0x00000010
+#define NFAST_INT_DEVICE_KERN_WRITE_FAILED 0x00000020
+#define NFAST_INT_DEVICE_KERN_READ_OK 0x00000040
+#define NFAST_INT_DEVICE_KERN_READ_FAILED 0x00000080
+
+/* Interrupts from host to device */
+#define NFAST_INT_HOST_WRITE_REQUEST 0x00010000
+#define NFAST_INT_HOST_READ_REQUEST 0x00020000
+#define NFAST_INT_HOST_DEBUG 0x00040000
+#define NFAST_INT_HOST_KERN_WRITE_REQUEST 0x00080000
+#define NFAST_INT_HOST_KERN_READ_REQUEST 0x00100000
+
+/* Ordinary job submission */
+
+/*
+ * The NFPCI_OFFSET_JOBS_WR and NFPCI_OFFSET_JOBS_RD regions
+ * are defined by the following (byte) address offsets.
+ */
+
+#define NFPCI_OFFSET_CONTROL 0x0
+#define NFPCI_OFFSET_LENGTH 0x4
+#define NFPCI_OFFSET_DATA 0x8
+#define NFPCI_OFFSET_PUSH_ADDR 0x8
+#define NFPCI_OFFSET_PULL_ADDR 0x8
+
+#define NFPCI_JOBS_WR_CONTROL (NFPCI_OFFSET_JOBS_WR + \
+ NFPCI_OFFSET_CONTROL)
+#define NFPCI_JOBS_WR_LENGTH (NFPCI_OFFSET_JOBS_WR + \
+ NFPCI_OFFSET_LENGTH)
+#define NFPCI_JOBS_WR_DATA (NFPCI_OFFSET_JOBS_WR + \
+ NFPCI_OFFSET_DATA)
+/* address in PCI space of host buffer for NFPCI_JOB_CONTROL_PCI_PUSH */
+#define NFPCI_JOBS_WR_PULL_ADDR (NFPCI_OFFSET_JOBS_WR + \
+ NFPCI_OFFSET_PULL_ADDR)
+#define NFPCI_MAX_JOBS_WR_LEN (0x0000FFF8)
+
+#define NFPCI_JOBS_RD_CONTROL (NFPCI_OFFSET_JOBS_RD + \
+ NFPCI_OFFSET_CONTROL)
+#define NFPCI_JOBS_RD_LENGTH (NFPCI_OFFSET_JOBS_RD + \
+ NFPCI_OFFSET_LENGTH)
+#define NFPCI_JOBS_RD_DATA (NFPCI_OFFSET_JOBS_RD + \
+ NFPCI_OFFSET_DATA)
+/* address in PCI space of host buffer for NFPCI_JOB_CONTROL_PCI_PUSH */
+#define NFPCI_JOBS_RD_PUSH_ADDR (NFPCI_OFFSET_JOBS_RD + \
+ NFPCI_OFFSET_PUSH_ADDR)
+#define NFPCI_MAX_JOBS_RD_LEN (0x000FFF8)
+
+/* Kernel interface job submission */
+
+#define NFPCI_KERN_WR_CONTROL (NFPCI_OFFSET_KERN_WR + \
+ NFPCI_OFFSET_CONTROL)
+#define NFPCI_KERN_WR_LENGTH (NFPCI_OFFSET_KERN_WR + \
+ NFPCI_OFFSET_LENGTH)
+#define NFPCI_KERN_WR_DATA (NFPCI_OFFSET_KERN_WR + \
+ NFPCI_OFFSET_DATA)
+/* address in PCI space of host buffer for NFPCI_JOB_CONTROL_PCI_PUSH */
+#define NFPCI_KERN_WR_PULL_ADDR (NFPCI_OFFSET_KERN_WR + \
+ NFPCI_OFFSET_PULL_ADDR)
+#define NFPCI_MAX_KERN_WR_LEN (0x0000FFF8)
+
+#define NFPCI_KERN_RD_CONTROL (NFPCI_OFFSET_KERN_RD + \
+ NFPCI_OFFSET_CONTROL)
+#define NFPCI_KERN_RD_LENGTH (NFPCI_OFFSET_KERN_RD + \
+ NFPCI_OFFSET_LENGTH)
+#define NFPCI_KERN_RD_DATA (NFPCI_OFFSET_KERN_RD + \
+ NFPCI_OFFSET_DATA)
+/* address in PCI space of host buffer for NFPCI_JOB_CONTROL_PCI_PUSH */
+#define NFPCI_KERN_RD_PUSH_ADDR (NFPCI_OFFSET_KERN_RD + \
+ NFPCI_OFFSET_PUSH_ADDR)
+#define NFPCI_MAX_KERN_RD_LEN (0x000FFF8)
+
+#define NFPCI_JOB_CONTROL 0x00000001
+#define NFPCI_JOB_CONTROL_PCI_PUSH 0x00000002
+#define NFPCI_JOB_CONTROL_PCI_PULL 0x00000003
+
+/*
+ * The 'Control' word is analogous to the SCSI read/write address;
+ * 1 = standard push/pull I/O
+ * 2 = push/push I/O
+ * 3 = pull/push I/O
+ *
+ * To submit a block of job data, the host:
+ * - sets the (32-bit, little-endian) word at NFPCI_JOBS_WR_CONTROL to
+ * NFPCI_JOB_CONTROL
+ * - sets the word at NFPCI_JOBS_WR_LENGTH to the length of the data
+ * - copies the data to NFPCI_JOBS_WR_DATA
+ * - sets interrupt NFAST_INT_HOST_WRITE_REQUEST in the doorbell register
+ * - awaits the NFAST_INT_DEVICE_WRITE_OK (or _FAILED) interrupts back
+ *
+ * To read a block of jobs back, the host:
+ * - sets the word at NFPCI_JOBS_RD_CONTROL to NFPCI_JOB_CONTROL
+ * - sets the word at NFPCI_JOBS_RD_LENGTH to the max length for returned data
+ * - sets interrupt NFAST_INT_HOST_READ_REQUEST
+ * - awaits the NFAST_INT_DEVICE_READ_OK (or _FAILED) interrupt
+ * - reads the data from NFPCI_JOBS_RD_DATA; the module will set the word at
+ * NFPCI_JOBS_RD_LENGTH to its actual length.
+ *
+ * Optionally the host can request the PCI read data to be pushed to host PCI
+ * mapped ram:
+ * - allocates a contiguous PCI addressable buffer for a NFPCI_JOBS_BLOCK of
+ * max size NFPCI_MAX_JOBS_RD_LEN (or NFPCI_MAX_KERN_RD_LEN) + 8
+ * - sets the word at NFPCI_JOBS_RD_CONTROL to NFPCI_JOB_CONTROL_PCI_PUSH
+ * - sets the word at NFPCI_JOBS_RD_LENGTH to the max length for returned data
+ * - sets the word at NFPCI_JOBS_RD_PUSH_ADDR to be the host PCI address of
+ * the buffer
+ * - sets interrupt NFAST_INT_HOST_READ_REQUEST
+ * - awaits the NFAST_INT_DEVICE_READ_OK (or _FAILED) interrupt
+ * - reads the data from the buffer at NFPCI_OFFSET_DATA in the buffer. The
+ * module will set NFPCI_OFFSET_LENGTH to the actual length.
+ *
+ * Optionally the host can request the PCI write data to be pulled from host
+ * PCI mapped ram:
+ * - allocates a contiguous PCI addressable buffer for a NFPCI_JOBS_BLOCK of
+ * max size NFPCI_MAX_JOBS_WR_LEN (or NFPCI_MAX_KERN_WR_LEN) + 8
+ * - copies the data to the PCI addressable buffer
+ * - sets the word at NFPCI_JOBS_WR_CONTROL to NFPCI_JOB_CONTROL_PCI_PULL
+ * - sets the word at NFPCI_JOBS_WR_LENGTH to the length of the data
+ * - sets the word at NFPCI_JOBS_RD_PULL_ADDR to be the host PCI address of
+ * the buffer
+ * - sets interrupt NFAST_INT_HOST_WRITE_REQUEST in the doorbell register
+ * - awaits the NFAST_INT_DEVICE_WRITE_OK (or _FAILED) interrupts back
+ */
+
+#define NFPCI_SCRATCH_CONTROL 0
+
+#define NFPCI_SCRATCH_CONTROL_HOST_MOI (0x1)
+#define NFPCI_SCRATCH_CONTROL_MODE_SHIFT 1
+#define NFPCI_SCRATCH_CONTROL_MODE_MASK (3 << \
+ NFPCI_SCRATCH_CONTROL_MODE_SHIFT)
+
+#define NFPCI_SCRATCH_STATUS 1
+
+#define NFPCI_SCRATCH_STATUS_MONITOR_MOI (0x1)
+#define NFPCI_SCRATCH_STATUS_APPLICATION_MOI (0x2)
+#define NFPCI_SCRATCH_STATUS_APPLICATION_RUNNING (0x4)
+#define NFPCI_SCRATCH_STATUS_ERROR (0x8)
+
+#define NFPCI_SCRATCH_ERROR_LO 2
+#define NFPCI_SCRATCH_ERROR_HI 3
+
+#define NFP_BARSIZES_COUNT 6
+/*
+ * This masks off the bottom bits of the PCI_CSR_BAR which signify that the
+ * BAR is an IO BAR rather than a MEM BAR
+ */
+#define NFP_BARSIZES_MASK ~0xF
+
+/* per-instance device structure */
+struct nfp_dev {
+ /* downward facing part of the device interface */
+ void __iomem *bar[NFP_BARSIZES_COUNT];
+ void *extra[NFP_BARSIZES_COUNT];
+ int busno;
+ int slotno;
+ struct nfp_dev *cmdctx;
+ char *iobuf;
+ int active_bar;
+ int created;
+ int conn_status;
+ int detection_type;
+ int iosize[6];
+ u32 irq;
+ struct nfpcmd_dev const *cmddev;
+ struct nfdev_stats_str stats;
+
+ /* upward facing part of the device interface */
+ u8 *read_buf;
+ dma_addr_t read_dma;
+
+ u8 *write_buf;
+ dma_addr_t write_dma;
+
+ struct pci_dev *pcidev;
+
+ atomic_t busy;
+ int ifvers;
+ struct timer_list rd_timer;
+
+ wait_queue_head_t rd_queue;
+ unsigned long rd_ready;
+ unsigned long rd_outstanding;
+ int rd_ok;
+
+ wait_queue_head_t wr_queue;
+ unsigned long wr_ready;
+ unsigned long wr_outstanding;
+ int wr_ok;
+
+ struct mutex ioctl_mutex; /* lock across ioctl */
+};
+
+/* Per-device-type command handlers */
+struct nfpcmd_dev {
+ const char *name;
+ u16 vendorid, deviceid, sub_vendorid, sub_deviceid;
+ u32 bar_sizes[NFP_BARSIZES_COUNT]; /* includes IO bit */
+ u32 flags, max_ifvers;
+
+ int (*create)(struct nfp_dev *ndev);
+ int (*destroy)(struct nfp_dev *ctx);
+ int (*open)(struct nfp_dev *ctx);
+ int (*close)(struct nfp_dev *ctx);
+ int (*isr)(struct nfp_dev *ctx, int *handled);
+ int (*write_block)(u32 addr,
+ const char __user *ublock, int len,
+ struct nfp_dev *ctx);
+ int (*read_block)(char __user *ublock,
+ int len, struct nfp_dev *ctx, int *rcount);
+ int (*ensure_reading)(dma_addr_t addr,
+ int len, struct nfp_dev *ctx, int lock_flag);
+ int (*setcontrol)(const struct nfdev_control_str *control,
+ struct nfp_dev *ctx); /* may be NULL */
+ int (*getstatus)(struct nfdev_status_str *status,
+ struct nfp_dev *ctx); /* may be NULL */
+};
+
+/* These instances are defined in the per-board driver modules */
+extern const struct nfpcmd_dev i21555_cmddev;
+extern const struct nfpcmd_dev fsl_t1022_cmddev;
+
+#define NFP_CMD_FLG_NEED_MSI 0x2
+
+#ifndef PCI_BASE_ADDRESS_SPACE_PREFETCHABLE
+#define PCI_BASE_ADDRESS_SPACE_PREFETCHABLE 0x8
+#endif
+
+/* callbacks from command drivers */
+void nfp_read_complete(struct nfp_dev *ndev, int ok);
+void nfp_write_complete(struct nfp_dev *ndev, int ok);
+
+/* status codes */
+#define NFP_HSM_STARTING 1 /* The HSM hasn't readied its PCI interface yet */
+#define NFP_HSM_POLLING 2 /* The HSM's EPD will use polling */
+
+/* error conversions table */
+struct errstr {
+ int oserr;
+ int nferr;
+};
+
+extern struct errstr errtab[];
+
+#endif /* SOLO_H */
diff --git a/include/uapi/linux/nshield_solo.h b/include/uapi/linux/nshield_solo.h
new file mode 100644
index 000000000000..9a45a792aebf
--- /dev/null
+++ b/include/uapi/linux/nshield_solo.h
@@ -0,0 +1,181 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ *
+ * nshield_solo.h: UAPI header for driving the nCipher PCI HSMs using the
+ * nshield_solo module
+ *
+ */
+#ifndef _UAPI_NSHIELD_SOLO_H_
+#define _UAPI_NSHIELD_SOLO_H_
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+/* Device ioctl struct definitions */
+
+/* Result of the ENQUIRY ioctl. */
+struct nfdev_enquiry_str {
+ __u32 busno; /**< Which bus is the PCI device on. */
+ __u8 slotno; /**< Which slot is the PCI device in. */
+ __u8 reserved[3]; /**< for consistent struct alignment */
+};
+
+/* Result of the STATS ioctl. */
+struct nfdev_stats_str {
+ __u32 isr; /**< Count interrupts. */
+ __u32 isr_read; /**< Count read interrupts. */
+ __u32 isr_write; /**< Count write interrupts. */
+ __u32 write_fail; /**< Count write failures. */
+ __u32 write_block; /**< Count blocks written. */
+ __u32 write_byte; /**< Count bytes written. */
+ __u32 read_fail; /**< Count read failures. */
+ __u32 read_block; /**< Count blocks read. */
+ __u32 read_byte; /**< Count bytes read. */
+ __u32 ensure_fail; /**< Count read request failures. */
+ __u32 ensure; /**< Count read requests. */
+};
+
+/* Result of the STATUS ioctl. */
+struct nfdev_status_str {
+ __u32 status; /**< Status flags. */
+ char error[8]; /**< Error string. */
+};
+
+/* Input to the CONTROL ioctl. */
+struct nfdev_control_str {
+ __u32 control; /**< Control flags. */
+};
+
+/** Index of control bits indicating desired mode
+ *
+ * Desired mode follows the M_ModuleMode enumeration.
+ */
+#define NFDEV_CONTROL_MODE_SHIFT 1
+
+/** Detect a backwards-compatible control value
+ *
+ * Returns true if the request control value "makes no difference", i.e.
+ * and the failure of an attempt to set it is therefore uninteresting.
+ */
+#define NFDEV_CONTROL_HARMLESS(c) ((c) <= 1)
+
+/** Monitor firmware supports MOI control and error reporting
+ */
+#define NFDEV_STATUS_MONITOR_MOI 0x0001
+
+/** Application firmware supports MOI control and error reporting
+ */
+#define NFDEV_STATUS_APPLICATION_MOI 0x0002
+
+/** Application firmware running and supports error reporting
+ */
+#define NFDEV_STATUS_APPLICATION_RUNNING 0x0004
+
+/** HSM failed
+ *
+ * Consult error[] for additional information.
+ */
+#define NFDEV_STATUS_FAILED 0x0008
+
+/** Standard PCI interface. */
+#define NFDEV_IF_STANDARD 0x01
+
+/** PCI interface with read replies pushed from device
+ * via DMA.
+ */
+#define NFDEV_IF_PCI_PUSH 0x02
+
+/** PCI interface with read replies pushed from device
+ * and write requests pulled from host via DMA.
+ */
+#define NFDEV_IF_PCI_PULL 0x03
+
+/** Maximum PCI interface. */
+#define NFDEV_IF_MAX_VERS NFDEV_IF_PCI_PUSH_PULL
+
+/* platform independent base ioctl numbers */
+
+enum {
+ /** Enquiry ioctl.
+ * \return nfdev_enquiry_str describing the attached device.
+ */
+ NFDEV_IOCTL_NUM_ENQUIRY = 1,
+
+ /** Channel Update ioctl.
+ * \deprecated
+ */
+ NFDEV_IOCTL_NUM_CHUPDATE,
+
+ /** Ensure Reading ioctl.
+ * Signal a read request to the device.
+ * \param (unsigned int) Length of data to be read.
+ */
+ NFDEV_IOCTL_NUM_ENSUREREADING,
+
+ /** Device Count ioctl.
+ * Not implemented for on all platforms.
+ * \return (int) the number of attached devices.
+ */
+ NFDEV_IOCTL_NUM_DEVCOUNT,
+
+ /** Internal Debug ioctl.
+ * Not implemented in release drivers.
+ */
+ NFDEV_IOCTL_NUM_DEBUG,
+
+ /** PCI Interface Version ioctl.
+ * \param (int) Maximum PCI interface version
+ * supported by the user of the device.
+ */
+ NFDEV_IOCTL_NUM_PCI_IFVERS,
+
+ /** Statistics ioctl.
+ * \return nfdev_enquiry_str describing the attached device.
+ */
+ NFDEV_IOCTL_NUM_STATS,
+
+ /** Module control ioctl
+ * \param (nfdev_control_str) Value to write to HSM
+ * control register
+ */
+ NFDEV_IOCTL_NUM_CONTROL,
+
+ /** Module state ioctl
+ * \return (nfdev_status_str) Values read from HSM
+ * status/error registers
+ */
+ NFDEV_IOCTL_NUM_STATUS,
+};
+
+#define NFDEV_IOCTL_TYPE 0x10
+
+#define NFDEV_IOCTL_CHUPDATE \
+ _IO(NFDEV_IOCTL_TYPE, NFDEV_IOCTL_NUM_CHUPDATE)
+
+#define NFDEV_IOCTL_ENQUIRY \
+ _IOR(NFDEV_IOCTL_TYPE, NFDEV_IOCTL_NUM_ENQUIRY, \
+ struct nfdev_enquiry_str)
+
+#define NFDEV_IOCTL_ENSUREREADING \
+ _IOW(NFDEV_IOCTL_TYPE, NFDEV_IOCTL_NUM_ENSUREREADING, int)
+
+#define NFDEV_IOCTL_ENSUREREADING_BUG3349 \
+ _IO(NFDEV_IOCTL_TYPE, NFDEV_IOCTL_NUM_ENSUREREADING)
+
+#define NFDEV_IOCTL_DEBUG \
+ _IOW(NFDEV_IOCTL_TYPE, NFDEV_IOCTL_NUM_DEBUG, int)
+
+#define NFDEV_IOCTL_PCI_IFVERS \
+ _IOW(NFDEV_IOCTL_TYPE, NFDEV_IOCTL_NUM_PCI_IFVERS, int)
+
+#define NFDEV_IOCTL_STATS \
+ _IOR(NFDEV_IOCTL_TYPE, NFDEV_IOCTL_NUM_STATS, struct nfdev_stats_str)
+
+#define NFDEV_IOCTL_CONTROL \
+ _IOW(NFDEV_IOCTL_TYPE, NFDEV_IOCTL_NUM_CONTROL, \
+ const struct nfdev_control_str)
+
+#define NFDEV_IOCTL_STATUS \
+ _IOR(NFDEV_IOCTL_TYPE, NFDEV_IOCTL_NUM_STATUS, struct nfdev_status_str)
+
+#endif /* _UAPI_NSHIELD_SOLO_H_ */
--
2.24.1

DavidÂKim
Senior Software Engineer
Tel: +44 1223 703449

nCipher Security
One Station Square
Cambridge CB1 2GA
United Kingdom

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