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soc: qcom: ipa: main code

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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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Elder 2020-03-05 22:28:17 -06:00 committed by David S. Miller
parent fc39c40a15
commit cdf2e9419d
5 changed files with 1639 additions and 0 deletions
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148
drivers/net/ipa/ipa.h Normal file
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/* 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_ */

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drivers/net/ipa/ipa_main.c Normal file
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// 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");

38
drivers/net/ipa/ipa_reg.c Normal file
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// 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);
}

476
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/* 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_ */

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drivers/net/ipa/ipa_version.h Normal file
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/* 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_ */