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Subject[PATCH v2 03/17] soc: qcom: ipa: main code
Date
This patch includes three source files that represent some basic "main
program" code for the IPA driver. They are:
- "ipa.h" defines the top-level IPA structure which represents an IPA
device throughout the code.
- "ipa_main.c" contains the platform driver probe function, along with
some general code used during initialization.
- "ipa_reg.h" defines the offsets of the 32-bit registers used for the
IPA device, along with masks that define the position and width of
fields within these registers.
- "version.h" defines some symbolic IPA version numbers.

Each file includes some documentation that provides a little more
overview of how the code is organized and used.

Signed-off-by: Alex Elder <elder@linaro.org>
---
drivers/net/ipa/ipa.h | 148 ++++++
drivers/net/ipa/ipa_main.c | 954 ++++++++++++++++++++++++++++++++++
drivers/net/ipa/ipa_reg.c | 38 ++
drivers/net/ipa/ipa_reg.h | 476 +++++++++++++++++
drivers/net/ipa/ipa_version.h | 23 +
5 files changed, 1639 insertions(+)
create mode 100644 drivers/net/ipa/ipa.h
create mode 100644 drivers/net/ipa/ipa_main.c
create mode 100644 drivers/net/ipa/ipa_reg.c
create mode 100644 drivers/net/ipa/ipa_reg.h
create mode 100644 drivers/net/ipa/ipa_version.h

diff --git a/drivers/net/ipa/ipa.h b/drivers/net/ipa/ipa.h
new file mode 100644
index 000000000000..23fb29889e5a
--- /dev/null
+++ b/drivers/net/ipa/ipa.h
@@ -0,0 +1,148 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2018-2020 Linaro Ltd.
+ */
+#ifndef _IPA_H_
+#define _IPA_H_
+
+#include <linux/types.h>
+#include <linux/device.h>
+#include <linux/notifier.h>
+#include <linux/pm_wakeup.h>
+
+#include "ipa_version.h"
+#include "gsi.h"
+#include "ipa_mem.h"
+#include "ipa_qmi.h"
+#include "ipa_endpoint.h"
+#include "ipa_interrupt.h"
+
+struct clk;
+struct icc_path;
+struct net_device;
+struct platform_device;
+
+struct ipa_clock;
+struct ipa_smp2p;
+struct ipa_interrupt;
+
+/**
+ * struct ipa - IPA information
+ * @gsi: Embedded GSI structure
+ * @version: IPA hardware version
+ * @pdev: Platform device
+ * @modem_rproc: Remoteproc handle for modem subsystem
+ * @smp2p: SMP2P information
+ * @clock: IPA clocking information
+ * @suspend_ref: Whether clock reference preventing suspend taken
+ * @table_addr: DMA address of filter/route table content
+ * @table_virt: Virtual address of filter/route table content
+ * @interrupt: IPA Interrupt information
+ * @uc_loaded: true after microcontroller has reported it's ready
+ * @reg_addr: DMA address used for IPA register access
+ * @reg_virt: Virtual address used for IPA register access
+ * @mem_addr: DMA address of IPA-local memory space
+ * @mem_virt: Virtual address of IPA-local memory space
+ * @mem_offset: Offset from @mem_virt used for access to IPA memory
+ * @mem_size: Total size (bytes) of memory at @mem_virt
+ * @mem: Array of IPA-local memory region descriptors
+ * @zero_addr: DMA address of preallocated zero-filled memory
+ * @zero_virt: Virtual address of preallocated zero-filled memory
+ * @zero_size: Size (bytes) of preallocated zero-filled memory
+ * @wakeup_source: Wakeup source information
+ * @available: Bit mask indicating endpoints hardware supports
+ * @filter_map: Bit mask indicating endpoints that support filtering
+ * @initialized: Bit mask indicating endpoints initialized
+ * @set_up: Bit mask indicating endpoints set up
+ * @enabled: Bit mask indicating endpoints enabled
+ * @endpoint: Array of endpoint information
+ * @channel_map: Mapping of GSI channel to IPA endpoint
+ * @name_map: Mapping of IPA endpoint name to IPA endpoint
+ * @setup_complete: Flag indicating whether setup stage has completed
+ * @modem_state: State of modem (stopped, running)
+ * @modem_netdev: Network device structure used for modem
+ * @qmi: QMI information
+ */
+struct ipa {
+ struct gsi gsi;
+ enum ipa_version version;
+ struct platform_device *pdev;
+ struct rproc *modem_rproc;
+ struct ipa_smp2p *smp2p;
+ struct ipa_clock *clock;
+ atomic_t suspend_ref;
+
+ dma_addr_t table_addr;
+ __le64 *table_virt;
+
+ struct ipa_interrupt *interrupt;
+ bool uc_loaded;
+
+ dma_addr_t reg_addr;
+ void __iomem *reg_virt;
+
+ dma_addr_t mem_addr;
+ void *mem_virt;
+ u32 mem_offset;
+ u32 mem_size;
+ const struct ipa_mem *mem;
+
+ dma_addr_t zero_addr;
+ void *zero_virt;
+ size_t zero_size;
+
+ struct wakeup_source *wakeup_source;
+
+ /* Bit masks indicating endpoint state */
+ u32 available; /* supported by hardware */
+ u32 filter_map;
+ u32 initialized;
+ u32 set_up;
+ u32 enabled;
+
+ struct ipa_endpoint endpoint[IPA_ENDPOINT_MAX];
+ struct ipa_endpoint *channel_map[GSI_CHANNEL_COUNT_MAX];
+ struct ipa_endpoint *name_map[IPA_ENDPOINT_COUNT];
+
+ bool setup_complete;
+
+ atomic_t modem_state; /* enum ipa_modem_state */
+ struct net_device *modem_netdev;
+ struct ipa_qmi qmi;
+};
+
+/**
+ * ipa_setup() - Perform IPA setup
+ * @ipa: IPA pointer
+ *
+ * IPA initialization is broken into stages: init; config; and setup.
+ * (These have inverses exit, deconfig, and teardown.)
+ *
+ * Activities performed at the init stage can be done without requiring
+ * any access to IPA hardware. Activities performed at the config stage
+ * require the IPA clock to be running, because they involve access
+ * to IPA registers. The setup stage is performed only after the GSI
+ * hardware is ready (more on this below). The setup stage allows
+ * the AP to perform more complex initialization by issuing "immediate
+ * commands" using a special interface to the IPA.
+ *
+ * This function, @ipa_setup(), starts the setup stage.
+ *
+ * In order for the GSI hardware to be functional it needs firmware to be
+ * loaded (in addition to some other low-level initialization). This early
+ * GSI initialization can be done either by Trust Zone on the AP or by the
+ * modem.
+ *
+ * If it's done by Trust Zone, the AP loads the GSI firmware and supplies
+ * it to Trust Zone to verify and install. When this completes, if
+ * verification was successful, the GSI layer is ready and ipa_setup()
+ * implements the setup phase of initialization.
+ *
+ * If the modem performs early GSI initialization, the AP needs to know
+ * when this has occurred. An SMP2P interrupt is used for this purpose,
+ * and receipt of that interrupt triggers the call to ipa_setup().
+ */
+int ipa_setup(struct ipa *ipa);
+
+#endif /* _IPA_H_ */
diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
new file mode 100644
index 000000000000..d6e7f257e99d
--- /dev/null
+++ b/drivers/net/ipa/ipa_main.c
@@ -0,0 +1,954 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2018-2020 Linaro Ltd.
+ */
+
+#include <linux/types.h>
+#include <linux/atomic.h>
+#include <linux/bitfield.h>
+#include <linux/device.h>
+#include <linux/bug.h>
+#include <linux/io.h>
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/remoteproc.h>
+#include <linux/qcom_scm.h>
+#include <linux/soc/qcom/mdt_loader.h>
+
+#include "ipa.h"
+#include "ipa_clock.h"
+#include "ipa_data.h"
+#include "ipa_endpoint.h"
+#include "ipa_cmd.h"
+#include "ipa_reg.h"
+#include "ipa_mem.h"
+#include "ipa_table.h"
+#include "ipa_modem.h"
+#include "ipa_uc.h"
+#include "ipa_interrupt.h"
+#include "gsi_trans.h"
+
+/**
+ * DOC: The IP Accelerator
+ *
+ * This driver supports the Qualcomm IP Accelerator (IPA), which is a
+ * networking component found in many Qualcomm SoCs. The IPA is connected
+ * to the application processor (AP), but is also connected (and partially
+ * controlled by) other "execution environments" (EEs), such as a modem.
+ *
+ * The IPA is the conduit between the AP and the modem that carries network
+ * traffic. This driver presents a network interface representing the
+ * connection of the modem to external (e.g. LTE) networks.
+ *
+ * The IPA provides protocol checksum calculation, offloading this work
+ * from the AP. The IPA offers additional functionality, including routing,
+ * filtering, and NAT support, but that more advanced functionality is not
+ * currently supported. Despite that, some resources--including routing
+ * tables and filter tables--are defined in this driver because they must
+ * be initialized even when the advanced hardware features are not used.
+ *
+ * There are two distinct layers that implement the IPA hardware, and this
+ * is reflected in the organization of the driver. The generic software
+ * interface (GSI) is an integral component of the IPA, providing a
+ * well-defined communication layer between the AP subsystem and the IPA
+ * core. The GSI implements a set of "channels" used for communication
+ * between the AP and the IPA.
+ *
+ * The IPA layer uses GSI channels to implement its "endpoints". And while
+ * a GSI channel carries data between the AP and the IPA, a pair of IPA
+ * endpoints is used to carry traffic between two EEs. Specifically, the main
+ * modem network interface is implemented by two pairs of endpoints: a TX
+ * endpoint on the AP coupled with an RX endpoint on the modem; and another
+ * RX endpoint on the AP receiving data from a TX endpoint on the modem.
+ */
+
+/* The name of the GSI firmware file relative to /lib/firmware */
+#define IPA_FWS_PATH "ipa_fws.mdt"
+#define IPA_PAS_ID 15
+
+/**
+ * ipa_suspend_handler() - Handle the suspend IPA interrupt
+ * @ipa: IPA pointer
+ * @irq_id: IPA interrupt type (unused)
+ *
+ * When in suspended state, the IPA can trigger a resume by sending a SUSPEND
+ * IPA interrupt.
+ */
+static void ipa_suspend_handler(struct ipa *ipa, enum ipa_irq_id irq_id)
+{
+ /* Take a a single clock reference to prevent suspend. All
+ * endpoints will be resumed as a result. This reference will
+ * be dropped when we get a power management suspend request.
+ */
+ if (!atomic_xchg(&ipa->suspend_ref, 1))
+ ipa_clock_get(ipa);
+
+ /* Acknowledge/clear the suspend interrupt on all endpoints */
+ ipa_interrupt_suspend_clear_all(ipa->interrupt);
+}
+
+/**
+ * ipa_setup() - Set up IPA hardware
+ * @ipa: IPA pointer
+ *
+ * Perform initialization that requires issuing immediate commands on
+ * the command TX endpoint. If the modem is doing GSI firmware load
+ * and initialization, this function will be called when an SMP2P
+ * interrupt has been signaled by the modem. Otherwise it will be
+ * called from ipa_probe() after GSI firmware has been successfully
+ * loaded, authenticated, and started by Trust Zone.
+ */
+int ipa_setup(struct ipa *ipa)
+{
+ struct ipa_endpoint *exception_endpoint;
+ struct ipa_endpoint *command_endpoint;
+ int ret;
+
+ /* IPA v4.0 and above don't use the doorbell engine. */
+ ret = gsi_setup(&ipa->gsi, ipa->version == IPA_VERSION_3_5_1);
+ if (ret)
+ return ret;
+
+ ipa->interrupt = ipa_interrupt_setup(ipa);
+ if (IS_ERR(ipa->interrupt)) {
+ ret = PTR_ERR(ipa->interrupt);
+ goto err_gsi_teardown;
+ }
+ ipa_interrupt_add(ipa->interrupt, IPA_IRQ_TX_SUSPEND,
+ ipa_suspend_handler);
+
+ ipa_uc_setup(ipa);
+
+ ipa_endpoint_setup(ipa);
+
+ /* We need to use the AP command TX endpoint to perform other
+ * initialization, so we enable first.
+ */
+ command_endpoint = ipa->name_map[IPA_ENDPOINT_AP_COMMAND_TX];
+ ret = ipa_endpoint_enable_one(command_endpoint);
+ if (ret)
+ goto err_endpoint_teardown;
+
+ ret = ipa_mem_setup(ipa);
+ if (ret)
+ goto err_command_disable;
+
+ ret = ipa_table_setup(ipa);
+ if (ret)
+ goto err_mem_teardown;
+
+ /* Enable the exception handling endpoint, and tell the hardware
+ * to use it by default.
+ */
+ exception_endpoint = ipa->name_map[IPA_ENDPOINT_AP_LAN_RX];
+ ret = ipa_endpoint_enable_one(exception_endpoint);
+ if (ret)
+ goto err_table_teardown;
+
+ ipa_endpoint_default_route_set(ipa, exception_endpoint->endpoint_id);
+
+ /* We're all set. Now prepare for communication with the modem */
+ ret = ipa_modem_setup(ipa);
+ if (ret)
+ goto err_default_route_clear;
+
+ ipa->setup_complete = true;
+
+ dev_info(&ipa->pdev->dev, "IPA driver setup completed successfully\n");
+
+ return 0;
+
+err_default_route_clear:
+ ipa_endpoint_default_route_clear(ipa);
+ ipa_endpoint_disable_one(exception_endpoint);
+err_table_teardown:
+ ipa_table_teardown(ipa);
+err_mem_teardown:
+ ipa_mem_teardown(ipa);
+err_command_disable:
+ ipa_endpoint_disable_one(command_endpoint);
+err_endpoint_teardown:
+ ipa_endpoint_teardown(ipa);
+ ipa_uc_teardown(ipa);
+ ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND);
+ ipa_interrupt_teardown(ipa->interrupt);
+err_gsi_teardown:
+ gsi_teardown(&ipa->gsi);
+
+ return ret;
+}
+
+/**
+ * ipa_teardown() - Inverse of ipa_setup()
+ * @ipa: IPA pointer
+ */
+static void ipa_teardown(struct ipa *ipa)
+{
+ struct ipa_endpoint *exception_endpoint;
+ struct ipa_endpoint *command_endpoint;
+
+ ipa_modem_teardown(ipa);
+ ipa_endpoint_default_route_clear(ipa);
+ exception_endpoint = ipa->name_map[IPA_ENDPOINT_AP_LAN_RX];
+ ipa_endpoint_disable_one(exception_endpoint);
+ ipa_table_teardown(ipa);
+ ipa_mem_teardown(ipa);
+ command_endpoint = ipa->name_map[IPA_ENDPOINT_AP_COMMAND_TX];
+ ipa_endpoint_disable_one(command_endpoint);
+ ipa_endpoint_teardown(ipa);
+ ipa_uc_teardown(ipa);
+ ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND);
+ ipa_interrupt_teardown(ipa->interrupt);
+ gsi_teardown(&ipa->gsi);
+}
+
+/* Configure QMB Core Master Port selection */
+static void ipa_hardware_config_comp(struct ipa *ipa)
+{
+ u32 val;
+
+ /* Nothing to configure for IPA v3.5.1 */
+ if (ipa->version == IPA_VERSION_3_5_1)
+ return;
+
+ val = ioread32(ipa->reg_virt + IPA_REG_COMP_CFG_OFFSET);
+
+ if (ipa->version == IPA_VERSION_4_0) {
+ val &= ~IPA_QMB_SELECT_CONS_EN_FMASK;
+ val &= ~IPA_QMB_SELECT_PROD_EN_FMASK;
+ val &= ~IPA_QMB_SELECT_GLOBAL_EN_FMASK;
+ } else {
+ val |= GSI_MULTI_AXI_MASTERS_DIS_FMASK;
+ }
+
+ val |= GSI_MULTI_INORDER_RD_DIS_FMASK;
+ val |= GSI_MULTI_INORDER_WR_DIS_FMASK;
+
+ iowrite32(val, ipa->reg_virt + IPA_REG_COMP_CFG_OFFSET);
+}
+
+/* Configure DDR and PCIe max read/write QSB values */
+static void ipa_hardware_config_qsb(struct ipa *ipa)
+{
+ u32 val;
+
+ /* QMB_0 represents DDR; QMB_1 represents PCIe (not present in 4.2) */
+ val = u32_encode_bits(8, GEN_QMB_0_MAX_WRITES_FMASK);
+ if (ipa->version == IPA_VERSION_4_2)
+ val |= u32_encode_bits(0, GEN_QMB_1_MAX_WRITES_FMASK);
+ else
+ val |= u32_encode_bits(4, GEN_QMB_1_MAX_WRITES_FMASK);
+ iowrite32(val, ipa->reg_virt + IPA_REG_QSB_MAX_WRITES_OFFSET);
+
+ if (ipa->version == IPA_VERSION_3_5_1) {
+ val = u32_encode_bits(8, GEN_QMB_0_MAX_READS_FMASK);
+ val |= u32_encode_bits(12, GEN_QMB_1_MAX_READS_FMASK);
+ } else {
+ val = u32_encode_bits(12, GEN_QMB_0_MAX_READS_FMASK);
+ if (ipa->version == IPA_VERSION_4_2)
+ val |= u32_encode_bits(0, GEN_QMB_1_MAX_READS_FMASK);
+ else
+ val |= u32_encode_bits(12, GEN_QMB_1_MAX_READS_FMASK);
+ /* GEN_QMB_0_MAX_READS_BEATS is 0 */
+ /* GEN_QMB_1_MAX_READS_BEATS is 0 */
+ }
+ iowrite32(val, ipa->reg_virt + IPA_REG_QSB_MAX_READS_OFFSET);
+}
+
+static void ipa_idle_indication_cfg(struct ipa *ipa,
+ u32 enter_idle_debounce_thresh,
+ bool const_non_idle_enable)
+{
+ u32 offset;
+ u32 val;
+
+ val = u32_encode_bits(enter_idle_debounce_thresh,
+ ENTER_IDLE_DEBOUNCE_THRESH_FMASK);
+ if (const_non_idle_enable)
+ val |= CONST_NON_IDLE_ENABLE_FMASK;
+
+ offset = ipa_reg_idle_indication_cfg_offset(ipa->version);
+ iowrite32(val, ipa->reg_virt + offset);
+}
+
+/**
+ * ipa_hardware_dcd_config() - Enable dynamic clock division on IPA
+ *
+ * Configures when the IPA signals it is idle to the global clock
+ * controller, which can respond by scalling down the clock to
+ * save power.
+ */
+static void ipa_hardware_dcd_config(struct ipa *ipa)
+{
+ /* Recommended values for IPA 3.5 according to IPA HPG */
+ ipa_idle_indication_cfg(ipa, 256, false);
+}
+
+static void ipa_hardware_dcd_deconfig(struct ipa *ipa)
+{
+ /* Power-on reset values */
+ ipa_idle_indication_cfg(ipa, 0, true);
+}
+
+/**
+ * ipa_hardware_config() - Primitive hardware initialization
+ * @ipa: IPA pointer
+ */
+static void ipa_hardware_config(struct ipa *ipa)
+{
+ u32 granularity;
+ u32 val;
+
+ /* Fill in backward-compatibility register, based on version */
+ val = ipa_reg_bcr_val(ipa->version);
+ iowrite32(val, ipa->reg_virt + IPA_REG_BCR_OFFSET);
+
+ if (ipa->version != IPA_VERSION_3_5_1) {
+ /* Enable open global clocks (hardware workaround) */
+ val = GLOBAL_FMASK;
+ val |= GLOBAL_2X_CLK_FMASK;
+ iowrite32(val, ipa->reg_virt + IPA_REG_CLKON_CFG_OFFSET);
+
+ /* Disable PA mask to allow HOLB drop (hardware workaround) */
+ val = ioread32(ipa->reg_virt + IPA_REG_TX_CFG_OFFSET);
+ val &= ~PA_MASK_EN;
+ iowrite32(val, ipa->reg_virt + IPA_REG_TX_CFG_OFFSET);
+ }
+
+ ipa_hardware_config_comp(ipa);
+
+ /* Configure system bus limits */
+ ipa_hardware_config_qsb(ipa);
+
+ /* Configure aggregation granularity */
+ val = ioread32(ipa->reg_virt + IPA_REG_COUNTER_CFG_OFFSET);
+ granularity = ipa_aggr_granularity_val(IPA_AGGR_GRANULARITY);
+ val = u32_encode_bits(granularity, AGGR_GRANULARITY);
+ iowrite32(val, ipa->reg_virt + IPA_REG_COUNTER_CFG_OFFSET);
+
+ /* Disable hashed IPv4 and IPv6 routing and filtering for IPA v4.2 */
+ if (ipa->version == IPA_VERSION_4_2)
+ iowrite32(0, ipa->reg_virt + IPA_REG_FILT_ROUT_HASH_EN_OFFSET);
+
+ /* Enable dynamic clock division */
+ ipa_hardware_dcd_config(ipa);
+}
+
+/**
+ * ipa_hardware_deconfig() - Inverse of ipa_hardware_config()
+ * @ipa: IPA pointer
+ *
+ * This restores the power-on reset values (even if they aren't different)
+ */
+static void ipa_hardware_deconfig(struct ipa *ipa)
+{
+ /* Mostly we just leave things as we set them. */
+ ipa_hardware_dcd_deconfig(ipa);
+}
+
+#ifdef IPA_VALIDATION
+
+/* # IPA resources used based on version (see IPA_RESOURCE_GROUP_COUNT) */
+static int ipa_resource_group_count(struct ipa *ipa)
+{
+ switch (ipa->version) {
+ case IPA_VERSION_3_5_1:
+ return 3;
+
+ case IPA_VERSION_4_0:
+ case IPA_VERSION_4_1:
+ return 4;
+
+ case IPA_VERSION_4_2:
+ return 1;
+
+ default:
+ return 0;
+ }
+}
+
+static bool ipa_resource_limits_valid(struct ipa *ipa,
+ const struct ipa_resource_data *data)
+{
+ u32 group_count = ipa_resource_group_count(ipa);
+ u32 i;
+ u32 j;
+
+ if (!group_count)
+ return false;
+
+ /* Return an error if a non-zero resource group limit is specified
+ * for a resource not supported by hardware.
+ */
+ for (i = 0; i < data->resource_src_count; i++) {
+ const struct ipa_resource_src *resource;
+
+ resource = &data->resource_src[i];
+ for (j = group_count; j < IPA_RESOURCE_GROUP_COUNT; j++)
+ if (resource->limits[j].min || resource->limits[j].max)
+ return false;
+ }
+
+ for (i = 0; i < data->resource_dst_count; i++) {
+ const struct ipa_resource_dst *resource;
+
+ resource = &data->resource_dst[i];
+ for (j = group_count; j < IPA_RESOURCE_GROUP_COUNT; j++)
+ if (resource->limits[j].min || resource->limits[j].max)
+ return false;
+ }
+
+ return true;
+}
+
+#else /* !IPA_VALIDATION */
+
+static bool ipa_resource_limits_valid(struct ipa *ipa,
+ const struct ipa_resource_data *data)
+{
+ return true;
+}
+
+#endif /* !IPA_VALIDATION */
+
+static void
+ipa_resource_config_common(struct ipa *ipa, u32 offset,
+ const struct ipa_resource_limits *xlimits,
+ const struct ipa_resource_limits *ylimits)
+{
+ u32 val;
+
+ val = u32_encode_bits(xlimits->min, X_MIN_LIM_FMASK);
+ val |= u32_encode_bits(xlimits->max, X_MAX_LIM_FMASK);
+ val |= u32_encode_bits(ylimits->min, Y_MIN_LIM_FMASK);
+ val |= u32_encode_bits(ylimits->max, Y_MAX_LIM_FMASK);
+
+ iowrite32(val, ipa->reg_virt + offset);
+}
+
+static void ipa_resource_config_src_01(struct ipa *ipa,
+ const struct ipa_resource_src *resource)
+{
+ u32 offset = IPA_REG_SRC_RSRC_GRP_01_RSRC_TYPE_N_OFFSET(resource->type);
+
+ ipa_resource_config_common(ipa, offset,
+ &resource->limits[0], &resource->limits[1]);
+}
+
+static void ipa_resource_config_src_23(struct ipa *ipa,
+ const struct ipa_resource_src *resource)
+{
+ u32 offset = IPA_REG_SRC_RSRC_GRP_23_RSRC_TYPE_N_OFFSET(resource->type);
+
+ ipa_resource_config_common(ipa, offset,
+ &resource->limits[2], &resource->limits[3]);
+}
+
+static void ipa_resource_config_dst_01(struct ipa *ipa,
+ const struct ipa_resource_dst *resource)
+{
+ u32 offset = IPA_REG_DST_RSRC_GRP_01_RSRC_TYPE_N_OFFSET(resource->type);
+
+ ipa_resource_config_common(ipa, offset,
+ &resource->limits[0], &resource->limits[1]);
+}
+
+static void ipa_resource_config_dst_23(struct ipa *ipa,
+ const struct ipa_resource_dst *resource)
+{
+ u32 offset = IPA_REG_DST_RSRC_GRP_23_RSRC_TYPE_N_OFFSET(resource->type);
+
+ ipa_resource_config_common(ipa, offset,
+ &resource->limits[2], &resource->limits[3]);
+}
+
+static int
+ipa_resource_config(struct ipa *ipa, const struct ipa_resource_data *data)
+{
+ u32 i;
+
+ if (!ipa_resource_limits_valid(ipa, data))
+ return -EINVAL;
+
+ for (i = 0; i < data->resource_src_count; i++) {
+ ipa_resource_config_src_01(ipa, &data->resource_src[i]);
+ ipa_resource_config_src_23(ipa, &data->resource_src[i]);
+ }
+
+ for (i = 0; i < data->resource_dst_count; i++) {
+ ipa_resource_config_dst_01(ipa, &data->resource_dst[i]);
+ ipa_resource_config_dst_23(ipa, &data->resource_dst[i]);
+ }
+
+ return 0;
+}
+
+static void ipa_resource_deconfig(struct ipa *ipa)
+{
+ /* Nothing to do */
+}
+
+/**
+ * ipa_config() - Configure IPA hardware
+ * @ipa: IPA pointer
+ *
+ * Perform initialization requiring IPA clock to be enabled.
+ */
+static int ipa_config(struct ipa *ipa, const struct ipa_data *data)
+{
+ int ret;
+
+ /* Get a clock reference to allow initialization. This reference
+ * is held after initialization completes, and won't get dropped
+ * unless/until a system suspend request arrives.
+ */
+ atomic_set(&ipa->suspend_ref, 1);
+ ipa_clock_get(ipa);
+
+ ipa_hardware_config(ipa);
+
+ ret = ipa_endpoint_config(ipa);
+ if (ret)
+ goto err_hardware_deconfig;
+
+ ret = ipa_mem_config(ipa);
+ if (ret)
+ goto err_endpoint_deconfig;
+
+ ipa_table_config(ipa);
+
+ /* Assign resource limitation to each group */
+ ret = ipa_resource_config(ipa, data->resource_data);
+ if (ret)
+ goto err_table_deconfig;
+
+ ret = ipa_modem_config(ipa);
+ if (ret)
+ goto err_resource_deconfig;
+
+ return 0;
+
+err_resource_deconfig:
+ ipa_resource_deconfig(ipa);
+err_table_deconfig:
+ ipa_table_deconfig(ipa);
+ ipa_mem_deconfig(ipa);
+err_endpoint_deconfig:
+ ipa_endpoint_deconfig(ipa);
+err_hardware_deconfig:
+ ipa_hardware_deconfig(ipa);
+ ipa_clock_put(ipa);
+ atomic_set(&ipa->suspend_ref, 0);
+
+ return ret;
+}
+
+/**
+ * ipa_deconfig() - Inverse of ipa_config()
+ * @ipa: IPA pointer
+ */
+static void ipa_deconfig(struct ipa *ipa)
+{
+ ipa_modem_deconfig(ipa);
+ ipa_resource_deconfig(ipa);
+ ipa_table_deconfig(ipa);
+ ipa_mem_deconfig(ipa);
+ ipa_endpoint_deconfig(ipa);
+ ipa_hardware_deconfig(ipa);
+ ipa_clock_put(ipa);
+ atomic_set(&ipa->suspend_ref, 0);
+}
+
+static int ipa_firmware_load(struct device *dev)
+{
+ const struct firmware *fw;
+ struct device_node *node;
+ struct resource res;
+ phys_addr_t phys;
+ ssize_t size;
+ void *virt;
+ int ret;
+
+ node = of_parse_phandle(dev->of_node, "memory-region", 0);
+ if (!node) {
+ dev_err(dev, "DT error getting \"memory-region\" property\n");
+ return -EINVAL;
+ }
+
+ ret = of_address_to_resource(node, 0, &res);
+ if (ret) {
+ dev_err(dev, "error %d getting \"memory-region\" resource\n",
+ ret);
+ return ret;
+ }
+
+ ret = request_firmware(&fw, IPA_FWS_PATH, dev);
+ if (ret) {
+ dev_err(dev, "error %d requesting \"%s\"\n", ret, IPA_FWS_PATH);
+ return ret;
+ }
+
+ phys = res.start;
+ size = (size_t)resource_size(&res);
+ virt = memremap(phys, size, MEMREMAP_WC);
+ if (!virt) {
+ dev_err(dev, "unable to remap firmware memory\n");
+ ret = -ENOMEM;
+ goto out_release_firmware;
+ }
+
+ ret = qcom_mdt_load(dev, fw, IPA_FWS_PATH, IPA_PAS_ID,
+ virt, phys, size, NULL);
+ if (ret)
+ dev_err(dev, "error %d loading \"%s\"\n", ret, IPA_FWS_PATH);
+ else if ((ret = qcom_scm_pas_auth_and_reset(IPA_PAS_ID)))
+ dev_err(dev, "error %d authenticating \"%s\"\n", ret,
+ IPA_FWS_PATH);
+
+ memunmap(virt);
+out_release_firmware:
+ release_firmware(fw);
+
+ return ret;
+}
+
+static const struct of_device_id ipa_match[] = {
+ {
+ .compatible = "qcom,sdm845-ipa",
+ .data = &ipa_data_sdm845,
+ },
+ {
+ .compatible = "qcom,sc7180-ipa",
+ .data = &ipa_data_sc7180,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, ipa_match);
+
+static phandle of_property_read_phandle(const struct device_node *np,
+ const char *name)
+{
+ struct property *prop;
+ int len = 0;
+
+ prop = of_find_property(np, name, &len);
+ if (!prop || len != sizeof(__be32))
+ return 0;
+
+ return be32_to_cpup(prop->value);
+}
+
+/* Check things that can be validated at build time. This just
+ * groups these things BUILD_BUG_ON() calls don't clutter the rest
+ * of the code.
+ * */
+static void ipa_validate_build(void)
+{
+#ifdef IPA_VALIDATE
+ /* We assume we're working on 64-bit hardware */
+ BUILD_BUG_ON(!IS_ENABLED(CONFIG_64BIT));
+
+ /* Code assumes the EE ID for the AP is 0 (zeroed structure field) */
+ BUILD_BUG_ON(GSI_EE_AP != 0);
+
+ /* There's no point if we have no channels or event rings */
+ BUILD_BUG_ON(!GSI_CHANNEL_COUNT_MAX);
+ BUILD_BUG_ON(!GSI_EVT_RING_COUNT_MAX);
+
+ /* GSI hardware design limits */
+ BUILD_BUG_ON(GSI_CHANNEL_COUNT_MAX > 32);
+ BUILD_BUG_ON(GSI_EVT_RING_COUNT_MAX > 31);
+
+ /* The number of TREs in a transaction is limited by the channel's
+ * TLV FIFO size. A transaction structure uses 8-bit fields
+ * to represents the number of TREs it has allocated and used.
+ */
+ BUILD_BUG_ON(GSI_TLV_MAX > U8_MAX);
+
+ /* Exceeding 128 bytes makes the transaction pool *much* larger */
+ BUILD_BUG_ON(sizeof(struct gsi_trans) > 128);
+
+ /* This is used as a divisor */
+ BUILD_BUG_ON(!IPA_AGGR_GRANULARITY);
+#endif /* IPA_VALIDATE */
+}
+
+/**
+ * ipa_probe() - IPA platform driver probe function
+ * @pdev: Platform device pointer
+ *
+ * @Return: 0 if successful, or a negative error code (possibly
+ * EPROBE_DEFER)
+ *
+ * This is the main entry point for the IPA driver. Initialization proceeds
+ * in several stages:
+ * - The "init" stage involves activities that can be initialized without
+ * access to the IPA hardware.
+ * - The "config" stage requires the IPA clock to be active so IPA registers
+ * can be accessed, but does not require the use of IPA immediate commands.
+ * - The "setup" stage uses IPA immediate commands, and so requires the GSI
+ * layer to be initialized.
+ *
+ * A Boolean Device Tree "modem-init" property determines whether GSI
+ * initialization will be performed by the AP (Trust Zone) or the modem.
+ * If the AP does GSI initialization, the setup phase is entered after
+ * this has completed successfully. Otherwise the modem initializes
+ * the GSI layer and signals it has finished by sending an SMP2P interrupt
+ * to the AP; this triggers the start if IPA setup.
+ */
+static int ipa_probe(struct platform_device *pdev)
+{
+ struct wakeup_source *wakeup_source;
+ struct device *dev = &pdev->dev;
+ const struct ipa_data *data;
+ struct ipa_clock *clock;
+ struct rproc *rproc;
+ bool modem_alloc;
+ bool modem_init;
+ struct ipa *ipa;
+ phandle phandle;
+ bool prefetch;
+ int ret;
+
+ ipa_validate_build();
+
+ /* If we need Trust Zone, make sure it's available */
+ modem_init = of_property_read_bool(dev->of_node, "modem-init");
+ if (!modem_init)
+ if (!qcom_scm_is_available())
+ return -EPROBE_DEFER;
+
+ /* We rely on remoteproc to tell us about modem state changes */
+ phandle = of_property_read_phandle(dev->of_node, "modem-remoteproc");
+ if (!phandle) {
+ dev_err(dev, "DT missing \"modem-remoteproc\" property\n");
+ return -EINVAL;
+ }
+
+ rproc = rproc_get_by_phandle(phandle);
+ if (!rproc)
+ return -EPROBE_DEFER;
+
+ /* The clock and interconnects might not be ready when we're
+ * probed, so might return -EPROBE_DEFER.
+ */
+ clock = ipa_clock_init(dev);
+ if (IS_ERR(clock)) {
+ ret = PTR_ERR(clock);
+ goto err_rproc_put;
+ }
+
+ /* No more EPROBE_DEFER. Get our configuration data */
+ data = of_device_get_match_data(dev);
+ if (!data) {
+ /* This is really IPA_VALIDATE (should never happen) */
+ dev_err(dev, "matched hardware not supported\n");
+ ret = -ENOTSUPP;
+ goto err_clock_exit;
+ }
+
+ /* Create a wakeup source. */
+ wakeup_source = wakeup_source_register(dev, "ipa");
+ if (!wakeup_source) {
+ /* The most likely reason for failure is memory exhaustion */
+ ret = -ENOMEM;
+ goto err_clock_exit;
+ }
+
+ /* Allocate and initialize the IPA structure */
+ ipa = kzalloc(sizeof(*ipa), GFP_KERNEL);
+ if (!ipa) {
+ ret = -ENOMEM;
+ goto err_wakeup_source_unregister;
+ }
+
+ ipa->pdev = pdev;
+ dev_set_drvdata(dev, ipa);
+ ipa->modem_rproc = rproc;
+ ipa->clock = clock;
+ atomic_set(&ipa->suspend_ref, 0);
+ ipa->wakeup_source = wakeup_source;
+ ipa->version = data->version;
+
+ ret = ipa_reg_init(ipa);
+ if (ret)
+ goto err_kfree_ipa;
+
+ ret = ipa_mem_init(ipa, data->mem_count, data->mem_data);
+ if (ret)
+ goto err_reg_exit;
+
+ /* GSI v2.0+ (IPA v4.0+) uses prefetch for the command channel */
+ prefetch = ipa->version != IPA_VERSION_3_5_1;
+ /* IPA v4.2 requires the AP to allocate channels for the modem */
+ modem_alloc = ipa->version == IPA_VERSION_4_2;
+
+ ret = gsi_init(&ipa->gsi, pdev, prefetch, data->endpoint_count,
+ data->endpoint_data, modem_alloc);
+ if (ret)
+ goto err_mem_exit;
+
+ /* Result is a non-zero mask endpoints that support filtering */
+ ipa->filter_map = ipa_endpoint_init(ipa, data->endpoint_count,
+ data->endpoint_data);
+ if (!ipa->filter_map) {
+ ret = -EINVAL;
+ goto err_gsi_exit;
+ }
+
+ ret = ipa_table_init(ipa);
+ if (ret)
+ goto err_endpoint_exit;
+
+ ret = ipa_modem_init(ipa, modem_init);
+ if (ret)
+ goto err_table_exit;
+
+ ret = ipa_config(ipa, data);
+ if (ret)
+ goto err_modem_exit;
+
+ dev_info(dev, "IPA driver initialized");
+
+ /* If the modem is doing early initialization, it will trigger a
+ * call to ipa_setup() call when it has finished. In that case
+ * we're done here.
+ */
+ if (modem_init)
+ return 0;
+
+ /* Otherwise we need to load the firmware and have Trust Zone validate
+ * and install it. If that succeeds we can proceed with setup.
+ */
+ ret = ipa_firmware_load(dev);
+ if (ret)
+ goto err_deconfig;
+
+ ret = ipa_setup(ipa);
+ if (ret)
+ goto err_deconfig;
+
+ return 0;
+
+err_deconfig:
+ ipa_deconfig(ipa);
+err_modem_exit:
+ ipa_modem_exit(ipa);
+err_table_exit:
+ ipa_table_exit(ipa);
+err_endpoint_exit:
+ ipa_endpoint_exit(ipa);
+err_gsi_exit:
+ gsi_exit(&ipa->gsi);
+err_mem_exit:
+ ipa_mem_exit(ipa);
+err_reg_exit:
+ ipa_reg_exit(ipa);
+err_kfree_ipa:
+ kfree(ipa);
+err_wakeup_source_unregister:
+ wakeup_source_unregister(wakeup_source);
+err_clock_exit:
+ ipa_clock_exit(clock);
+err_rproc_put:
+ rproc_put(rproc);
+
+ return ret;
+}
+
+static int ipa_remove(struct platform_device *pdev)
+{
+ struct ipa *ipa = dev_get_drvdata(&pdev->dev);
+ struct rproc *rproc = ipa->modem_rproc;
+ struct ipa_clock *clock = ipa->clock;
+ struct wakeup_source *wakeup_source;
+ int ret;
+
+ wakeup_source = ipa->wakeup_source;
+
+ if (ipa->setup_complete) {
+ ret = ipa_modem_stop(ipa);
+ if (ret)
+ return ret;
+
+ ipa_teardown(ipa);
+ }
+
+ ipa_deconfig(ipa);
+ ipa_modem_exit(ipa);
+ ipa_table_exit(ipa);
+ ipa_endpoint_exit(ipa);
+ gsi_exit(&ipa->gsi);
+ ipa_mem_exit(ipa);
+ ipa_reg_exit(ipa);
+ kfree(ipa);
+ wakeup_source_unregister(wakeup_source);
+ ipa_clock_exit(clock);
+ rproc_put(rproc);
+
+ return 0;
+}
+
+/**
+ * ipa_suspend() - Power management system suspend callback
+ * @dev: IPA device structure
+ *
+ * @Return: Zero
+ *
+ * Called by the PM framework when a system suspend operation is invoked.
+ */
+static int ipa_suspend(struct device *dev)
+{
+ struct ipa *ipa = dev_get_drvdata(dev);
+
+ ipa_clock_put(ipa);
+ atomic_set(&ipa->suspend_ref, 0);
+
+ return 0;
+}
+
+/**
+ * ipa_resume() - Power management system resume callback
+ * @dev: IPA device structure
+ *
+ * @Return: Always returns 0
+ *
+ * Called by the PM framework when a system resume operation is invoked.
+ */
+static int ipa_resume(struct device *dev)
+{
+ struct ipa *ipa = dev_get_drvdata(dev);
+
+ /* This clock reference will keep the IPA out of suspend
+ * until we get a power management suspend request.
+ */
+ atomic_set(&ipa->suspend_ref, 1);
+ ipa_clock_get(ipa);
+
+ return 0;
+}
+
+static const struct dev_pm_ops ipa_pm_ops = {
+ .suspend_noirq = ipa_suspend,
+ .resume_noirq = ipa_resume,
+};
+
+static struct platform_driver ipa_driver = {
+ .probe = ipa_probe,
+ .remove = ipa_remove,
+ .driver = {
+ .name = "ipa",
+ .owner = THIS_MODULE,
+ .pm = &ipa_pm_ops,
+ .of_match_table = ipa_match,
+ },
+};
+
+module_platform_driver(ipa_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Qualcomm IP Accelerator device driver");
diff --git a/drivers/net/ipa/ipa_reg.c b/drivers/net/ipa/ipa_reg.c
new file mode 100644
index 000000000000..e6147a1cd787
--- /dev/null
+++ b/drivers/net/ipa/ipa_reg.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2019-2020 Linaro Ltd.
+ */
+
+#include <linux/io.h>
+
+#include "ipa.h"
+#include "ipa_reg.h"
+
+int ipa_reg_init(struct ipa *ipa)
+{
+ struct device *dev = &ipa->pdev->dev;
+ struct resource *res;
+
+ /* Setup IPA register memory */
+ res = platform_get_resource_byname(ipa->pdev, IORESOURCE_MEM,
+ "ipa-reg");
+ if (!res) {
+ dev_err(dev, "DT error getting \"ipa-reg\" memory property\n");
+ return -ENODEV;
+ }
+
+ ipa->reg_virt = ioremap(res->start, resource_size(res));
+ if (!ipa->reg_virt) {
+ dev_err(dev, "unable to remap \"ipa-reg\" memory\n");
+ return -ENOMEM;
+ }
+ ipa->reg_addr = res->start;
+
+ return 0;
+}
+
+void ipa_reg_exit(struct ipa *ipa)
+{
+ iounmap(ipa->reg_virt);
+}
diff --git a/drivers/net/ipa/ipa_reg.h b/drivers/net/ipa/ipa_reg.h
new file mode 100644
index 000000000000..3b8106aa277a
--- /dev/null
+++ b/drivers/net/ipa/ipa_reg.h
@@ -0,0 +1,476 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2018-2020 Linaro Ltd.
+ */
+#ifndef _IPA_REG_H_
+#define _IPA_REG_H_
+
+#include <linux/bitfield.h>
+
+#include "ipa_version.h"
+
+struct ipa;
+
+/**
+ * DOC: IPA Registers
+ *
+ * IPA registers are located within the "ipa-reg" address space defined by
+ * Device Tree. The offset of each register within that space is specified
+ * by symbols defined below. The address space is mapped to virtual memory
+ * space in ipa_mem_init(). All IPA registers are 32 bits wide.
+ *
+ * Certain register types are duplicated for a number of instances of
+ * something. For example, each IPA endpoint has an set of registers
+ * defining its configuration. The offset to an endpoint's set of registers
+ * is computed based on an "base" offset, plus an endpoint's ID multiplied
+ * and a "stride" value for the register. For such registers, the offset is
+ * computed by a function-like macro that takes a parameter used in the
+ * computation.
+ *
+ * Some register offsets depend on execution environment. For these an "ee"
+ * parameter is supplied to the offset macro. The "ee" value is a member of
+ * the gsi_ee enumerated type.
+ *
+ * The offset of a register dependent on endpoint id is computed by a macro
+ * that is supplied a parameter "ep". The "ep" value is assumed to be less
+ * than the maximum endpoint value for the current hardware, and that will
+ * not exceed IPA_ENDPOINT_MAX.
+ *
+ * The offset of registers related to filter and route tables is computed
+ * by a macro that is supplied a parameter "er". The "er" represents an
+ * endpoint ID for filters, or a route ID for routes. For filters, the
+ * endpoint ID must be less than IPA_ENDPOINT_MAX, but is further restricted
+ * because not all endpoints support filtering. For routes, the route ID
+ * must be less than IPA_ROUTE_MAX.
+ *
+ * The offset of registers related to resource types is computed by a macro
+ * that is supplied a parameter "rt". The "rt" represents a resource type,
+ * which is is a member of the ipa_resource_type_src enumerated type for
+ * source endpoint resources or the ipa_resource_type_dst enumerated type
+ * for destination endpoint resources.
+ *
+ * Some registers encode multiple fields within them. For these, each field
+ * has a symbol below defining a field mask that encodes both the position
+ * and width of the field within its register.
+ *
+ * In some cases, different versions of IPA hardware use different offset or
+ * field mask values. In such cases an inline_function(ipa) is used rather
+ * than a MACRO to define the offset or field mask to use.
+ *
+ * Finally, some registers hold bitmasks representing endpoints. In such
+ * cases the @available field in the @ipa structure defines the "full" set
+ * of valid bits for the register.
+ */
+
+#define IPA_REG_ENABLED_PIPES_OFFSET 0x00000038
+
+#define IPA_REG_COMP_CFG_OFFSET 0x0000003c
+#define ENABLE_FMASK GENMASK(0, 0)
+#define GSI_SNOC_BYPASS_DIS_FMASK GENMASK(1, 1)
+#define GEN_QMB_0_SNOC_BYPASS_DIS_FMASK GENMASK(2, 2)
+#define GEN_QMB_1_SNOC_BYPASS_DIS_FMASK GENMASK(3, 3)
+#define IPA_DCMP_FAST_CLK_EN_FMASK GENMASK(4, 4)
+#define IPA_QMB_SELECT_CONS_EN_FMASK GENMASK(5, 5)
+#define IPA_QMB_SELECT_PROD_EN_FMASK GENMASK(6, 6)
+#define GSI_MULTI_INORDER_RD_DIS_FMASK GENMASK(7, 7)
+#define GSI_MULTI_INORDER_WR_DIS_FMASK GENMASK(8, 8)
+#define GEN_QMB_0_MULTI_INORDER_RD_DIS_FMASK GENMASK(9, 9)
+#define GEN_QMB_1_MULTI_INORDER_RD_DIS_FMASK GENMASK(10, 10)
+#define GEN_QMB_0_MULTI_INORDER_WR_DIS_FMASK GENMASK(11, 11)
+#define GEN_QMB_1_MULTI_INORDER_WR_DIS_FMASK GENMASK(12, 12)
+#define GEN_QMB_0_SNOC_CNOC_LOOP_PROT_DIS_FMASK GENMASK(13, 13)
+#define GSI_SNOC_CNOC_LOOP_PROT_DISABLE_FMASK GENMASK(14, 14)
+#define GSI_MULTI_AXI_MASTERS_DIS_FMASK GENMASK(15, 15)
+#define IPA_QMB_SELECT_GLOBAL_EN_FMASK GENMASK(16, 16)
+#define IPA_ATOMIC_FETCHER_ARB_LOCK_DIS_FMASK GENMASK(20, 17)
+
+#define IPA_REG_CLKON_CFG_OFFSET 0x00000044
+#define RX_FMASK GENMASK(0, 0)
+#define PROC_FMASK GENMASK(1, 1)
+#define TX_WRAPPER_FMASK GENMASK(2, 2)
+#define MISC_FMASK GENMASK(3, 3)
+#define RAM_ARB_FMASK GENMASK(4, 4)
+#define FTCH_HPS_FMASK GENMASK(5, 5)
+#define FTCH_DPS_FMASK GENMASK(6, 6)
+#define HPS_FMASK GENMASK(7, 7)
+#define DPS_FMASK GENMASK(8, 8)
+#define RX_HPS_CMDQS_FMASK GENMASK(9, 9)
+#define HPS_DPS_CMDQS_FMASK GENMASK(10, 10)
+#define DPS_TX_CMDQS_FMASK GENMASK(11, 11)
+#define RSRC_MNGR_FMASK GENMASK(12, 12)
+#define CTX_HANDLER_FMASK GENMASK(13, 13)
+#define ACK_MNGR_FMASK GENMASK(14, 14)
+#define D_DCPH_FMASK GENMASK(15, 15)
+#define H_DCPH_FMASK GENMASK(16, 16)
+#define DCMP_FMASK GENMASK(17, 17)
+#define NTF_TX_CMDQS_FMASK GENMASK(18, 18)
+#define TX_0_FMASK GENMASK(19, 19)
+#define TX_1_FMASK GENMASK(20, 20)
+#define FNR_FMASK GENMASK(21, 21)
+#define QSB2AXI_CMDQ_L_FMASK GENMASK(22, 22)
+#define AGGR_WRAPPER_FMASK GENMASK(23, 23)
+#define RAM_SLAVEWAY_FMASK GENMASK(24, 24)
+#define QMB_FMASK GENMASK(25, 25)
+#define WEIGHT_ARB_FMASK GENMASK(26, 26)
+#define GSI_IF_FMASK GENMASK(27, 27)
+#define GLOBAL_FMASK GENMASK(28, 28)
+#define GLOBAL_2X_CLK_FMASK GENMASK(29, 29)
+
+#define IPA_REG_ROUTE_OFFSET 0x00000048
+#define ROUTE_DIS_FMASK GENMASK(0, 0)
+#define ROUTE_DEF_PIPE_FMASK GENMASK(5, 1)
+#define ROUTE_DEF_HDR_TABLE_FMASK GENMASK(6, 6)
+#define ROUTE_DEF_HDR_OFST_FMASK GENMASK(16, 7)
+#define ROUTE_FRAG_DEF_PIPE_FMASK GENMASK(21, 17)
+#define ROUTE_DEF_RETAIN_HDR_FMASK GENMASK(24, 24)
+
+#define IPA_REG_SHARED_MEM_SIZE_OFFSET 0x00000054
+#define SHARED_MEM_SIZE_FMASK GENMASK(15, 0)
+#define SHARED_MEM_BADDR_FMASK GENMASK(31, 16)
+
+#define IPA_REG_QSB_MAX_WRITES_OFFSET 0x00000074
+#define GEN_QMB_0_MAX_WRITES_FMASK GENMASK(3, 0)
+#define GEN_QMB_1_MAX_WRITES_FMASK GENMASK(7, 4)
+
+#define IPA_REG_QSB_MAX_READS_OFFSET 0x00000078
+#define GEN_QMB_0_MAX_READS_FMASK GENMASK(3, 0)
+#define GEN_QMB_1_MAX_READS_FMASK GENMASK(7, 4)
+/* The next two fields are present for IPA v4.0 and above */
+#define GEN_QMB_0_MAX_READS_BEATS_FMASK GENMASK(23, 16)
+#define GEN_QMB_1_MAX_READS_BEATS_FMASK GENMASK(31, 24)
+
+static inline u32 ipa_reg_state_aggr_active_offset(enum ipa_version version)
+{
+ if (version == IPA_VERSION_3_5_1)
+ return 0x0000010c;
+
+ return 0x000000b4;
+}
+/* ipa->available defines the valid bits in the STATE_AGGR_ACTIVE register */
+
+/* The next register is present for IPA v4.2 and above */
+#define IPA_REG_FILT_ROUT_HASH_EN_OFFSET 0x00000148
+#define IPV6_ROUTER_HASH_EN GENMASK(0, 0)
+#define IPV6_FILTER_HASH_EN GENMASK(4, 4)
+#define IPV4_ROUTER_HASH_EN GENMASK(8, 8)
+#define IPV4_FILTER_HASH_EN GENMASK(12, 12)
+
+static inline u32 ipa_reg_filt_rout_hash_flush_offset(enum ipa_version version)
+{
+ if (version == IPA_VERSION_3_5_1)
+ return 0x0000090;
+
+ return 0x000014c;
+}
+
+#define IPV6_ROUTER_HASH_FLUSH GENMASK(0, 0)
+#define IPV6_FILTER_HASH_FLUSH GENMASK(4, 4)
+#define IPV4_ROUTER_HASH_FLUSH GENMASK(8, 8)
+#define IPV4_FILTER_HASH_FLUSH GENMASK(12, 12)
+
+#define IPA_REG_BCR_OFFSET 0x000001d0
+#define BCR_CMDQ_L_LACK_ONE_ENTRY BIT(0)
+#define BCR_TX_NOT_USING_BRESP BIT(1)
+#define BCR_SUSPEND_L2_IRQ BIT(3)
+#define BCR_HOLB_DROP_L2_IRQ BIT(4)
+#define BCR_DUAL_TX BIT(5)
+
+/* Backward compatibility register value to use for each version */
+static inline u32 ipa_reg_bcr_val(enum ipa_version version)
+{
+ if (version == IPA_VERSION_3_5_1)
+ return BCR_CMDQ_L_LACK_ONE_ENTRY | BCR_TX_NOT_USING_BRESP |
+ BCR_SUSPEND_L2_IRQ | BCR_HOLB_DROP_L2_IRQ | BCR_DUAL_TX;
+
+ if (version == IPA_VERSION_4_0 || version == IPA_VERSION_4_1)
+ return BCR_CMDQ_L_LACK_ONE_ENTRY | BCR_SUSPEND_L2_IRQ |
+ BCR_HOLB_DROP_L2_IRQ | BCR_DUAL_TX;
+
+ return 0x00000000;
+}
+
+
+#define IPA_REG_LOCAL_PKT_PROC_CNTXT_BASE_OFFSET 0x000001e8
+
+#define IPA_REG_AGGR_FORCE_CLOSE_OFFSET 0x000001ec
+/* ipa->available defines the valid bits in the AGGR_FORCE_CLOSE register */
+
+#define IPA_REG_COUNTER_CFG_OFFSET 0x000001f0
+#define AGGR_GRANULARITY GENMASK(8, 4)
+/* Compute the value to use in the AGGR_GRANULARITY field representing
+ * the given number of microseconds (up to 1 millisecond).
+ * x = (32 * usec) / 1000 - 1
+ */
+static inline u32 ipa_aggr_granularity_val(u32 microseconds)
+{
+ /* assert(microseconds >= 16); (?) */
+ /* assert(microseconds <= 1015); */
+
+ return DIV_ROUND_CLOSEST(32 * microseconds, 1000) - 1;
+}
+
+#define IPA_REG_TX_CFG_OFFSET 0x000001fc
+/* The first three fields are present for IPA v3.5.1 only */
+#define TX0_PREFETCH_DISABLE GENMASK(0, 0)
+#define TX1_PREFETCH_DISABLE GENMASK(1, 1)
+#define PREFETCH_ALMOST_EMPTY_SIZE GENMASK(4, 2)
+/* The next fields are present for IPA v4.0 and above */
+#define PREFETCH_ALMOST_EMPTY_SIZE_TX0 GENMASK(5, 2)
+#define DMAW_SCND_OUTSD_PRED_THRESHOLD GENMASK(9, 6)
+#define DMAW_SCND_OUTSD_PRED_EN GENMASK(10, 10)
+#define DMAW_MAX_BEATS_256_DIS GENMASK(11, 11)
+#define PA_MASK_EN GENMASK(12, 12)
+#define PREFETCH_ALMOST_EMPTY_SIZE_TX1 GENMASK(16, 13)
+/* The last two fields are present for IPA v4.2 and above */
+#define SSPND_PA_NO_START_STATE GENMASK(18, 18)
+#define SSPND_PA_NO_BQ_STATE GENMASK(19, 19)
+
+#define IPA_REG_FLAVOR_0_OFFSET 0x00000210
+#define BAM_MAX_PIPES_FMASK GENMASK(4, 0)
+#define BAM_MAX_CONS_PIPES_FMASK GENMASK(12, 8)
+#define BAM_MAX_PROD_PIPES_FMASK GENMASK(20, 16)
+#define BAM_PROD_LOWEST_FMASK GENMASK(27, 24)
+
+static inline u32 ipa_reg_idle_indication_cfg_offset(enum ipa_version version)
+{
+ if (version == IPA_VERSION_4_2)
+ return 0x00000240;
+
+ return 0x00000220;
+}
+
+#define ENTER_IDLE_DEBOUNCE_THRESH_FMASK GENMASK(15, 0)
+#define CONST_NON_IDLE_ENABLE_FMASK GENMASK(16, 16)
+
+#define IPA_REG_SRC_RSRC_GRP_01_RSRC_TYPE_N_OFFSET(rt) \
+ (0x00000400 + 0x0020 * (rt))
+#define IPA_REG_SRC_RSRC_GRP_23_RSRC_TYPE_N_OFFSET(rt) \
+ (0x00000404 + 0x0020 * (rt))
+#define IPA_REG_SRC_RSRC_GRP_45_RSRC_TYPE_N_OFFSET(rt) \
+ (0x00000408 + 0x0020 * (rt))
+#define IPA_REG_DST_RSRC_GRP_01_RSRC_TYPE_N_OFFSET(rt) \
+ (0x00000500 + 0x0020 * (rt))
+#define IPA_REG_DST_RSRC_GRP_23_RSRC_TYPE_N_OFFSET(rt) \
+ (0x00000504 + 0x0020 * (rt))
+#define IPA_REG_DST_RSRC_GRP_45_RSRC_TYPE_N_OFFSET(rt) \
+ (0x00000508 + 0x0020 * (rt))
+#define X_MIN_LIM_FMASK GENMASK(5, 0)
+#define X_MAX_LIM_FMASK GENMASK(13, 8)
+#define Y_MIN_LIM_FMASK GENMASK(21, 16)
+#define Y_MAX_LIM_FMASK GENMASK(29, 24)
+
+#define IPA_REG_ENDP_INIT_CTRL_N_OFFSET(ep) \
+ (0x00000800 + 0x0070 * (ep))
+#define ENDP_SUSPEND_FMASK GENMASK(0, 0)
+#define ENDP_DELAY_FMASK GENMASK(1, 1)
+
+#define IPA_REG_ENDP_INIT_CFG_N_OFFSET(ep) \
+ (0x00000808 + 0x0070 * (ep))
+#define FRAG_OFFLOAD_EN_FMASK GENMASK(0, 0)
+#define CS_OFFLOAD_EN_FMASK GENMASK(2, 1)
+#define CS_METADATA_HDR_OFFSET_FMASK GENMASK(6, 3)
+#define CS_GEN_QMB_MASTER_SEL_FMASK GENMASK(8, 8)
+
+#define IPA_REG_ENDP_INIT_HDR_N_OFFSET(ep) \
+ (0x00000810 + 0x0070 * (ep))
+#define HDR_LEN_FMASK GENMASK(5, 0)
+#define HDR_OFST_METADATA_VALID_FMASK GENMASK(6, 6)
+#define HDR_OFST_METADATA_FMASK GENMASK(12, 7)
+#define HDR_ADDITIONAL_CONST_LEN_FMASK GENMASK(18, 13)
+#define HDR_OFST_PKT_SIZE_VALID_FMASK GENMASK(19, 19)
+#define HDR_OFST_PKT_SIZE_FMASK GENMASK(25, 20)
+#define HDR_A5_MUX_FMASK GENMASK(26, 26)
+#define HDR_LEN_INC_DEAGG_HDR_FMASK GENMASK(27, 27)
+#define HDR_METADATA_REG_VALID_FMASK GENMASK(28, 28)
+
+#define IPA_REG_ENDP_INIT_HDR_EXT_N_OFFSET(ep) \
+ (0x00000814 + 0x0070 * (ep))
+#define HDR_ENDIANNESS_FMASK GENMASK(0, 0)
+#define HDR_TOTAL_LEN_OR_PAD_VALID_FMASK GENMASK(1, 1)
+#define HDR_TOTAL_LEN_OR_PAD_FMASK GENMASK(2, 2)
+#define HDR_PAYLOAD_LEN_INC_PADDING_FMASK GENMASK(3, 3)
+#define HDR_TOTAL_LEN_OR_PAD_OFFSET_FMASK GENMASK(9, 4)
+#define HDR_PAD_TO_ALIGNMENT_FMASK GENMASK(13, 10)
+
+#define IPA_REG_ENDP_INIT_HDR_METADATA_MASK_N_OFFSET(ep) \
+ (0x00000818 + 0x0070 * (ep))
+
+#define IPA_REG_ENDP_INIT_MODE_N_OFFSET(ep) \
+ (0x00000820 + 0x0070 * (ep))
+#define MODE_FMASK GENMASK(2, 0)
+#define DEST_PIPE_INDEX_FMASK GENMASK(8, 4)
+#define BYTE_THRESHOLD_FMASK GENMASK(27, 12)
+#define PIPE_REPLICATION_EN_FMASK GENMASK(28, 28)
+#define PAD_EN_FMASK GENMASK(29, 29)
+#define HDR_FTCH_DISABLE_FMASK GENMASK(30, 30)
+
+#define IPA_REG_ENDP_INIT_AGGR_N_OFFSET(ep) \
+ (0x00000824 + 0x0070 * (ep))
+#define AGGR_EN_FMASK GENMASK(1, 0)
+#define AGGR_TYPE_FMASK GENMASK(4, 2)
+#define AGGR_BYTE_LIMIT_FMASK GENMASK(9, 5)
+#define AGGR_TIME_LIMIT_FMASK GENMASK(14, 10)
+#define AGGR_PKT_LIMIT_FMASK GENMASK(20, 15)
+#define AGGR_SW_EOF_ACTIVE_FMASK GENMASK(21, 21)
+#define AGGR_FORCE_CLOSE_FMASK GENMASK(22, 22)
+#define AGGR_HARD_BYTE_LIMIT_ENABLE_FMASK GENMASK(24, 24)
+
+#define IPA_REG_ENDP_INIT_HOL_BLOCK_EN_N_OFFSET(ep) \
+ (0x0000082c + 0x0070 * (ep))
+#define HOL_BLOCK_EN_FMASK GENMASK(0, 0)
+
+/* The next register is valid only for RX (IPA producer) endpoints */
+#define IPA_REG_ENDP_INIT_HOL_BLOCK_TIMER_N_OFFSET(ep) \
+ (0x00000830 + 0x0070 * (ep))
+/* The next fields are present for IPA v4.2 only */
+#define BASE_VALUE_FMASK GENMASK(4, 0)
+#define SCALE_FMASK GENMASK(12, 8)
+
+#define IPA_REG_ENDP_INIT_DEAGGR_N_OFFSET(ep) \
+ (0x00000834 + 0x0070 * (ep))
+#define DEAGGR_HDR_LEN_FMASK GENMASK(5, 0)
+#define PACKET_OFFSET_VALID_FMASK GENMASK(7, 7)
+#define PACKET_OFFSET_LOCATION_FMASK GENMASK(13, 8)
+#define MAX_PACKET_LEN_FMASK GENMASK(31, 16)
+
+#define IPA_REG_ENDP_INIT_RSRC_GRP_N_OFFSET(ep) \
+ (0x00000838 + 0x0070 * (ep))
+#define RSRC_GRP_FMASK GENMASK(1, 0)
+
+#define IPA_REG_ENDP_INIT_SEQ_N_OFFSET(ep) \
+ (0x0000083c + 0x0070 * (ep))
+#define HPS_SEQ_TYPE_FMASK GENMASK(3, 0)
+#define DPS_SEQ_TYPE_FMASK GENMASK(7, 4)
+#define HPS_REP_SEQ_TYPE_FMASK GENMASK(11, 8)
+#define DPS_REP_SEQ_TYPE_FMASK GENMASK(15, 12)
+
+#define IPA_REG_ENDP_STATUS_N_OFFSET(ep) \
+ (0x00000840 + 0x0070 * (ep))
+#define STATUS_EN_FMASK GENMASK(0, 0)
+#define STATUS_ENDP_FMASK GENMASK(5, 1)
+#define STATUS_LOCATION_FMASK GENMASK(8, 8)
+/* The next field is present for IPA v4.0 and above */
+#define STATUS_PKT_SUPPRESS_FMASK GENMASK(9, 9)
+
+/* "er" is either an endpoint id (for filters) or a route id (for routes) */
+#define IPA_REG_ENDP_FILTER_ROUTER_HSH_CFG_N_OFFSET(er) \
+ (0x0000085c + 0x0070 * (er))
+#define FILTER_HASH_MSK_SRC_ID_FMASK GENMASK(0, 0)
+#define FILTER_HASH_MSK_SRC_IP_FMASK GENMASK(1, 1)
+#define FILTER_HASH_MSK_DST_IP_FMASK GENMASK(2, 2)
+#define FILTER_HASH_MSK_SRC_PORT_FMASK GENMASK(3, 3)
+#define FILTER_HASH_MSK_DST_PORT_FMASK GENMASK(4, 4)
+#define FILTER_HASH_MSK_PROTOCOL_FMASK GENMASK(5, 5)
+#define FILTER_HASH_MSK_METADATA_FMASK GENMASK(6, 6)
+#define IPA_REG_ENDP_FILTER_HASH_MSK_ALL GENMASK(6, 0)
+
+#define ROUTER_HASH_MSK_SRC_ID_FMASK GENMASK(16, 16)
+#define ROUTER_HASH_MSK_SRC_IP_FMASK GENMASK(17, 17)
+#define ROUTER_HASH_MSK_DST_IP_FMASK GENMASK(18, 18)
+#define ROUTER_HASH_MSK_SRC_PORT_FMASK GENMASK(19, 19)
+#define ROUTER_HASH_MSK_DST_PORT_FMASK GENMASK(20, 20)
+#define ROUTER_HASH_MSK_PROTOCOL_FMASK GENMASK(21, 21)
+#define ROUTER_HASH_MSK_METADATA_FMASK GENMASK(22, 22)
+#define IPA_REG_ENDP_ROUTER_HASH_MSK_ALL GENMASK(22, 16)
+
+#define IPA_REG_IRQ_STTS_OFFSET \
+ IPA_REG_IRQ_STTS_EE_N_OFFSET(GSI_EE_AP)
+#define IPA_REG_IRQ_STTS_EE_N_OFFSET(ee) \
+ (0x00003008 + 0x1000 * (ee))
+
+#define IPA_REG_IRQ_EN_OFFSET \
+ IPA_REG_IRQ_EN_EE_N_OFFSET(GSI_EE_AP)
+#define IPA_REG_IRQ_EN_EE_N_OFFSET(ee) \
+ (0x0000300c + 0x1000 * (ee))
+
+#define IPA_REG_IRQ_CLR_OFFSET \
+ IPA_REG_IRQ_CLR_EE_N_OFFSET(GSI_EE_AP)
+#define IPA_REG_IRQ_CLR_EE_N_OFFSET(ee) \
+ (0x00003010 + 0x1000 * (ee))
+
+#define IPA_REG_IRQ_UC_OFFSET \
+ IPA_REG_IRQ_UC_EE_N_OFFSET(GSI_EE_AP)
+#define IPA_REG_IRQ_UC_EE_N_OFFSET(ee) \
+ (0x0000301c + 0x1000 * (ee))
+
+#define IPA_REG_IRQ_SUSPEND_INFO_OFFSET \
+ IPA_REG_IRQ_SUSPEND_INFO_EE_N_OFFSET(GSI_EE_AP)
+#define IPA_REG_IRQ_SUSPEND_INFO_EE_N_OFFSET(ee) \
+ (0x00003030 + 0x1000 * (ee))
+/* ipa->available defines the valid bits in the SUSPEND_INFO register */
+
+#define IPA_REG_SUSPEND_IRQ_EN_OFFSET \
+ IPA_REG_SUSPEND_IRQ_EN_EE_N_OFFSET(GSI_EE_AP)
+#define IPA_REG_SUSPEND_IRQ_EN_EE_N_OFFSET(ee) \
+ (0x00003034 + 0x1000 * (ee))
+/* ipa->available defines the valid bits in the SUSPEND_IRQ_EN register */
+
+#define IPA_REG_SUSPEND_IRQ_CLR_OFFSET \
+ IPA_REG_SUSPEND_IRQ_CLR_EE_N_OFFSET(GSI_EE_AP)
+#define IPA_REG_SUSPEND_IRQ_CLR_EE_N_OFFSET(ee) \
+ (0x00003038 + 0x1000 * (ee))
+/* ipa->available defines the valid bits in the SUSPEND_IRQ_CLR register */
+
+/** enum ipa_cs_offload_en - checksum offload field in ENDP_INIT_CFG_N */
+enum ipa_cs_offload_en {
+ IPA_CS_OFFLOAD_NONE = 0,
+ IPA_CS_OFFLOAD_UL = 1,
+ IPA_CS_OFFLOAD_DL = 2,
+ IPA_CS_RSVD
+};
+
+/** enum ipa_aggr_en - aggregation type field in ENDP_INIT_AGGR_N */
+enum ipa_aggr_en {
+ IPA_BYPASS_AGGR = 0,
+ IPA_ENABLE_AGGR = 1,
+ IPA_ENABLE_DEAGGR = 2,
+};
+
+/** enum ipa_aggr_type - aggregation type field in in_ENDP_INIT_AGGR_N */
+enum ipa_aggr_type {
+ IPA_MBIM_16 = 0,
+ IPA_HDLC = 1,
+ IPA_TLP = 2,
+ IPA_RNDIS = 3,
+ IPA_GENERIC = 4,
+ IPA_COALESCE = 5,
+ IPA_QCMAP = 6,
+};
+
+/** enum ipa_mode - mode field in ENDP_INIT_MODE_N */
+enum ipa_mode {
+ IPA_BASIC = 0,
+ IPA_ENABLE_FRAMING_HDLC = 1,
+ IPA_ENABLE_DEFRAMING_HDLC = 2,
+ IPA_DMA = 3,
+};
+
+/**
+ * enum ipa_seq_type - HPS and DPS sequencer type fields in in ENDP_INIT_SEQ_N
+ * @IPA_SEQ_DMA_ONLY: only DMA is performed
+ * @IPA_SEQ_PKT_PROCESS_NO_DEC_UCP:
+ * packet processing + no decipher + microcontroller (Ethernet Bridging)
+ * @IPA_SEQ_2ND_PKT_PROCESS_PASS_NO_DEC_UCP:
+ * second packet processing pass + no decipher + microcontroller
+ * @IPA_SEQ_DMA_DEC: DMA + cipher/decipher
+ * @IPA_SEQ_DMA_COMP_DECOMP: DMA + compression/decompression
+ * @IPA_SEQ_INVALID: invalid sequencer type
+ *
+ * The values defined here are broken into 4-bit nibbles that are written
+ * into fields of the INIT_SEQ_N endpoint registers.
+ */
+enum ipa_seq_type {
+ IPA_SEQ_DMA_ONLY = 0x0000,
+ IPA_SEQ_PKT_PROCESS_NO_DEC_UCP = 0x0002,
+ IPA_SEQ_2ND_PKT_PROCESS_PASS_NO_DEC_UCP = 0x0004,
+ IPA_SEQ_DMA_DEC = 0x0011,
+ IPA_SEQ_DMA_COMP_DECOMP = 0x0020,
+ IPA_SEQ_PKT_PROCESS_NO_DEC_NO_UCP_DMAP = 0x0806,
+ IPA_SEQ_INVALID = 0xffff,
+};
+
+int ipa_reg_init(struct ipa *ipa);
+void ipa_reg_exit(struct ipa *ipa);
+
+#endif /* _IPA_REG_H_ */
diff --git a/drivers/net/ipa/ipa_version.h b/drivers/net/ipa/ipa_version.h
new file mode 100644
index 000000000000..85449df0f512
--- /dev/null
+++ b/drivers/net/ipa/ipa_version.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2019-2020 Linaro Ltd.
+ */
+#ifndef _IPA_VERSION_H_
+#define _IPA_VERSION_H_
+
+/**
+ * enum ipa_version
+ *
+ * Defines the version of IPA (and GSI) hardware present on the platform.
+ * It seems this might be better defined elsewhere, but having it here gets
+ * it where it's needed.
+ */
+enum ipa_version {
+ IPA_VERSION_3_5_1, /* GSI version 1.3.0 */
+ IPA_VERSION_4_0, /* GSI version 2.0 */
+ IPA_VERSION_4_1, /* GSI version 2.1 */
+ IPA_VERSION_4_2, /* GSI version 2.2 */
+};
+
+#endif /* _IPA_VERSION_H_ */
--
2.20.1
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