crypto: qat - Intel(R) QAT DH895xcc accelerator

This patch adds DH895xCC hardware specific code. It hooks to the common infrastructure and provides acceleration for crypto algorithms. Acked-by: John Griffin <john.griffin@intel.com> Reviewed-by: Bruce W. Allan <bruce.w.allan@intel.com> Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
mariux64 · Jun 20, 2014 · 7afa232 · 7afa232
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diff --git a/drivers/crypto/qat/qat_dh895xcc/Makefile b/drivers/crypto/qat/qat_dh895xcc/Makefile
@@ -0,0 +1,8 @@
+ccflags-y := -I$(CURDIR)/drivers/crypto/qat/qat_common
+obj-$(CONFIG_CRYPTO_DEV_QAT_DH895xCC) += qat_dh895xcc.o
+qat_dh895xcc-objs := adf_drv.o \
+		adf_isr.o \
+		adf_dh895xcc_hw_data.o \
+		adf_hw_arbiter.o \
+		qat_admin.o \
+		adf_admin.o
diff --git a/drivers/crypto/qat/qat_dh895xcc/adf_admin.c b/drivers/crypto/qat/qat_dh895xcc/adf_admin.c
@@ -0,0 +1,144 @@
+/*
+  This file is provided under a dual BSD/GPLv2 license.  When using or
+  redistributing this file, you may do so under either license.
+
+  GPL LICENSE SUMMARY
+  Copyright(c) 2014 Intel Corporation.
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of version 2 of the GNU General Public License as
+  published by the Free Software Foundation.
+
+  This program is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  Contact Information:
+  qat-linux@intel.com
+
+  BSD LICENSE
+  Copyright(c) 2014 Intel Corporation.
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in
+      the documentation and/or other materials provided with the
+      distribution.
+    * Neither the name of Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <adf_accel_devices.h>
+#include "adf_drv.h"
+#include "adf_dh895xcc_hw_data.h"
+
+#define ADF_ADMINMSG_LEN 32
+
+struct adf_admin_comms {
+	dma_addr_t phy_addr;
+	void *virt_addr;
+	void __iomem *mailbox_addr;
+	struct mutex lock;	/* protects adf_admin_comms struct */
+};
+
+int adf_put_admin_msg_sync(struct adf_accel_dev *accel_dev,
+			   uint32_t ae, void *in, void *out)
+{
+	struct adf_admin_comms *admin = accel_dev->admin;
+	int offset = ae * ADF_ADMINMSG_LEN * 2;
+	void __iomem *mailbox = admin->mailbox_addr;
+	int mb_offset = ae * ADF_DH895XCC_MAILBOX_STRIDE;
+	int times, received;
+
+	mutex_lock(&admin->lock);
+
+	if (ADF_CSR_RD(mailbox, mb_offset) == 1) {
+		mutex_unlock(&admin->lock);
+		return -EAGAIN;
+	}
+
+	memcpy(admin->virt_addr + offset, in, ADF_ADMINMSG_LEN);
+	ADF_CSR_WR(mailbox, mb_offset, 1);
+	received = 0;
+	for (times = 0; times < 50; times++) {
+		msleep(20);
+		if (ADF_CSR_RD(mailbox, mb_offset) == 0) {
+			received = 1;
+			break;
+		}
+	}
+	if (received)
+		memcpy(out, admin->virt_addr + offset +
+		       ADF_ADMINMSG_LEN, ADF_ADMINMSG_LEN);
+	else
+		pr_err("QAT: Failed to send admin msg to accelerator\n");
+
+	mutex_unlock(&admin->lock);
+	return received ? 0 : -EFAULT;
+}
+
+int adf_init_admin_comms(struct adf_accel_dev *accel_dev)
+{
+	struct adf_admin_comms *admin;
+	struct adf_bar *pmisc = &GET_BARS(accel_dev)[ADF_DH895XCC_PMISC_BAR];
+	void __iomem *csr = pmisc->virt_addr;
+	void __iomem *mailbox = csr + ADF_DH895XCC_MAILBOX_BASE_OFFSET;
+	uint64_t reg_val;
+
+	admin = kzalloc_node(sizeof(*accel_dev->admin), GFP_KERNEL,
+			     accel_dev->numa_node);
+	if (!admin)
+		return -ENOMEM;
+	admin->virt_addr = dma_zalloc_coherent(&GET_DEV(accel_dev), PAGE_SIZE,
+					       &admin->phy_addr, GFP_KERNEL);
+	if (!admin->virt_addr) {
+		dev_err(&GET_DEV(accel_dev), "Failed to allocate dma buff\n");
+		kfree(admin);
+		return -ENOMEM;
+	}
+	reg_val = (uint64_t)admin->phy_addr;
+	ADF_CSR_WR(csr, ADF_DH895XCC_ADMINMSGUR_OFFSET, reg_val >> 32);
+	ADF_CSR_WR(csr, ADF_DH895XCC_ADMINMSGLR_OFFSET, reg_val);
+	mutex_init(&admin->lock);
+	admin->mailbox_addr = mailbox;
+	accel_dev->admin = admin;
+	return 0;
+}
+
+void adf_exit_admin_comms(struct adf_accel_dev *accel_dev)
+{
+	struct adf_admin_comms *admin = accel_dev->admin;
+
+	if (!admin)
+		return;
+
+	if (admin->virt_addr)
+		dma_free_coherent(&GET_DEV(accel_dev), PAGE_SIZE,
+				  admin->virt_addr, admin->phy_addr);
+
+	mutex_destroy(&admin->lock);
+	kfree(admin);
+	accel_dev->admin = NULL;
+}
diff --git a/drivers/crypto/qat/qat_dh895xcc/adf_dh895xcc_hw_data.c b/drivers/crypto/qat/qat_dh895xcc/adf_dh895xcc_hw_data.c
@@ -0,0 +1,214 @@
+/*
+  This file is provided under a dual BSD/GPLv2 license.  When using or
+  redistributing this file, you may do so under either license.
+
+  GPL LICENSE SUMMARY
+  Copyright(c) 2014 Intel Corporation.
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of version 2 of the GNU General Public License as
+  published by the Free Software Foundation.
+
+  This program is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  Contact Information:
+  qat-linux@intel.com
+
+  BSD LICENSE
+  Copyright(c) 2014 Intel Corporation.
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in
+      the documentation and/or other materials provided with the
+      distribution.
+    * Neither the name of Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#include <adf_accel_devices.h>
+#include "adf_dh895xcc_hw_data.h"
+#include "adf_drv.h"
+
+/* Worker thread to service arbiter mappings based on dev SKUs */
+static const uint32_t thrd_to_arb_map_sku4[] = {
+	0x12222AAA, 0x11666666, 0x12222AAA, 0x11666666,
+	0x12222AAA, 0x11222222, 0x12222AAA, 0x11222222,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000
+};
+
+static const uint32_t thrd_to_arb_map_sku6[] = {
+	0x12222AAA, 0x11666666, 0x12222AAA, 0x11666666,
+	0x12222AAA, 0x11222222, 0x12222AAA, 0x11222222,
+	0x12222AAA, 0x11222222, 0x12222AAA, 0x11222222
+};
+
+static struct adf_hw_device_class dh895xcc_class = {
+	.name = ADF_DH895XCC_DEVICE_NAME,
+	.type = DEV_DH895XCC,
+	.instances = 0
+};
+
+static uint32_t get_accel_mask(uint32_t fuse)
+{
+	return (~fuse) >> ADF_DH895XCC_ACCELERATORS_REG_OFFSET &
+			  ADF_DH895XCC_ACCELERATORS_MASK;
+}
+
+static uint32_t get_ae_mask(uint32_t fuse)
+{
+	return (~fuse) & ADF_DH895XCC_ACCELENGINES_MASK;
+}
+
+static uint32_t get_num_accels(struct adf_hw_device_data *self)
+{
+	uint32_t i, ctr = 0;
+
+	if (!self || !self->accel_mask)
+		return 0;
+
+	for (i = 0; i < ADF_DH895XCC_MAX_ACCELERATORS; i++) {
+		if (self->accel_mask & (1 << i))
+			ctr++;
+	}
+	return ctr;
+}
+
+static uint32_t get_num_aes(struct adf_hw_device_data *self)
+{
+	uint32_t i, ctr = 0;
+
+	if (!self || !self->ae_mask)
+		return 0;
+
+	for (i = 0; i < ADF_DH895XCC_MAX_ACCELENGINES; i++) {
+		if (self->ae_mask & (1 << i))
+			ctr++;
+	}
+	return ctr;
+}
+
+static uint32_t get_misc_bar_id(struct adf_hw_device_data *self)
+{
+	return ADF_DH895XCC_PMISC_BAR;
+}
+
+static uint32_t get_etr_bar_id(struct adf_hw_device_data *self)
+{
+	return ADF_DH895XCC_ETR_BAR;
+}
+
+static enum dev_sku_info get_sku(struct adf_hw_device_data *self)
+{
+	int sku = (self->fuses & ADF_DH895XCC_FUSECTL_SKU_MASK)
+	    >> ADF_DH895XCC_FUSECTL_SKU_SHIFT;
+
+	switch (sku) {
+	case ADF_DH895XCC_FUSECTL_SKU_1:
+		return DEV_SKU_1;
+	case ADF_DH895XCC_FUSECTL_SKU_2:
+		return DEV_SKU_2;
+	case ADF_DH895XCC_FUSECTL_SKU_3:
+		return DEV_SKU_3;
+	case ADF_DH895XCC_FUSECTL_SKU_4:
+		return DEV_SKU_4;
+	default:
+		return DEV_SKU_UNKNOWN;
+	}
+	return DEV_SKU_UNKNOWN;
+}
+
+void adf_get_arbiter_mapping(struct adf_accel_dev *accel_dev,
+			     uint32_t const **arb_map_config)
+{
+	switch (accel_dev->accel_pci_dev.sku) {
+	case DEV_SKU_1:
+		*arb_map_config = thrd_to_arb_map_sku4;
+		break;
+
+	case DEV_SKU_2:
+	case DEV_SKU_4:
+		*arb_map_config = thrd_to_arb_map_sku6;
+		break;
+	default:
+		pr_err("QAT: The configuration doesn't match any SKU");
+		*arb_map_config = NULL;
+	}
+}
+
+static void adf_enable_error_correction(struct adf_accel_dev *accel_dev)
+{
+	struct adf_hw_device_data *hw_device = accel_dev->hw_device;
+	struct adf_bar *misc_bar = &GET_BARS(accel_dev)[ADF_DH895XCC_PMISC_BAR];
+	void __iomem *csr = misc_bar->virt_addr;
+	unsigned int val, i;
+
+	/* Enable Accel Engine error detection & correction */
+	for (i = 0; i < hw_device->get_num_aes(hw_device); i++) {
+		val = ADF_CSR_RD(csr, ADF_DH895XCC_AE_CTX_ENABLES(i));
+		val |= ADF_DH895XCC_ENABLE_AE_ECC_ERR;
+		ADF_CSR_WR(csr, ADF_DH895XCC_AE_CTX_ENABLES(i), val);
+		val = ADF_CSR_RD(csr, ADF_DH895XCC_AE_MISC_CONTROL(i));
+		val |= ADF_DH895XCC_ENABLE_AE_ECC_PARITY_CORR;
+		ADF_CSR_WR(csr, ADF_DH895XCC_AE_MISC_CONTROL(i), val);
+	}
+
+	/* Enable shared memory error detection & correction */
+	for (i = 0; i < hw_device->get_num_accels(hw_device); i++) {
+		val = ADF_CSR_RD(csr, ADF_DH895XCC_UERRSSMSH(i));
+		val |= ADF_DH895XCC_ERRSSMSH_EN;
+		ADF_CSR_WR(csr, ADF_DH895XCC_UERRSSMSH(i), val);
+		val = ADF_CSR_RD(csr, ADF_DH895XCC_CERRSSMSH(i));
+		val |= ADF_DH895XCC_ERRSSMSH_EN;
+		ADF_CSR_WR(csr, ADF_DH895XCC_CERRSSMSH(i), val);
+	}
+}
+
+void adf_init_hw_data_dh895xcc(struct adf_hw_device_data *hw_data)
+{
+	hw_data->dev_class = &dh895xcc_class;
+	hw_data->instance_id = dh895xcc_class.instances++;
+	hw_data->num_banks = ADF_DH895XCC_ETR_MAX_BANKS;
+	hw_data->num_accel = ADF_DH895XCC_MAX_ACCELERATORS;
+	hw_data->pci_dev_id = ADF_DH895XCC_PCI_DEVICE_ID;
+	hw_data->num_logical_accel = 1;
+	hw_data->num_engines = ADF_DH895XCC_MAX_ACCELENGINES;
+	hw_data->tx_rx_gap = ADF_DH895XCC_RX_RINGS_OFFSET;
+	hw_data->tx_rings_mask = ADF_DH895XCC_TX_RINGS_MASK;
+	hw_data->alloc_irq = adf_isr_resource_alloc;
+	hw_data->free_irq = adf_isr_resource_free;
+	hw_data->enable_error_correction = adf_enable_error_correction;
+	hw_data->hw_arb_ring_enable = adf_update_ring_arb_enable;
+	hw_data->hw_arb_ring_disable = adf_update_ring_arb_enable;
+	hw_data->get_accel_mask = get_accel_mask;
+	hw_data->get_ae_mask = get_ae_mask;
+	hw_data->get_num_accels = get_num_accels;
+	hw_data->get_num_aes = get_num_aes;
+	hw_data->get_etr_bar_id = get_etr_bar_id;
+	hw_data->get_misc_bar_id = get_misc_bar_id;
+	hw_data->get_sku = get_sku;
+	hw_data->fw_name = ADF_DH895XCC_FW;
+}
+
+void adf_clean_hw_data_dh895xcc(struct adf_hw_device_data *hw_data)
+{
+	hw_data->dev_class->instances--;
+}