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linux_dsm_epyc7002/drivers/net/ethernet/freescale/fman/fman_keygen.c
Iordache Florinel-R70177 7472f4f281 fsl/fman: enable FMan Keygen 
Add support for the FMan Keygen with a hardcoded scheme to spread
incoming traffic on a FQ range based on source and destination IPs
and ports.

Signed-off-by: Iordache Florinel <florinel.iordache@nxp.com>
Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-28 16:41:00 -07:00

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/*
* Copyright 2017 NXP
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of NXP nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY NXP ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NXP BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/slab.h>
#include "fman_keygen.h"
/* Maximum number of HW Ports */
#define FMAN_MAX_NUM_OF_HW_PORTS 64
/* Maximum number of KeyGen Schemes */
#define FM_KG_MAX_NUM_OF_SCHEMES 32
/* Number of generic KeyGen Generic Extract Command Registers */
#define FM_KG_NUM_OF_GENERIC_REGS 8
/* Dummy port ID */
#define DUMMY_PORT_ID 0
/* Select Scheme Value Register */
#define KG_SCH_DEF_USE_KGSE_DV_0 2
#define KG_SCH_DEF_USE_KGSE_DV_1 3
/* Registers Shifting values */
#define FM_KG_KGAR_NUM_SHIFT 16
#define KG_SCH_DEF_L4_PORT_SHIFT 8
#define KG_SCH_DEF_IP_ADDR_SHIFT 18
#define KG_SCH_HASH_CONFIG_SHIFT_SHIFT 24
/* KeyGen Registers bit field masks: */
/* Enable bit field mask for KeyGen General Configuration Register */
#define FM_KG_KGGCR_EN 0x80000000
/* KeyGen Global Registers bit field masks */
#define FM_KG_KGAR_GO 0x80000000
#define FM_KG_KGAR_READ 0x40000000
#define FM_KG_KGAR_WRITE 0x00000000
#define FM_KG_KGAR_SEL_SCHEME_ENTRY 0x00000000
#define FM_KG_KGAR_SCM_WSEL_UPDATE_CNT 0x00008000
#define FM_KG_KGAR_ERR 0x20000000
#define FM_KG_KGAR_SEL_CLS_PLAN_ENTRY 0x01000000
#define FM_KG_KGAR_SEL_PORT_ENTRY 0x02000000
#define FM_KG_KGAR_SEL_PORT_WSEL_SP 0x00008000
#define FM_KG_KGAR_SEL_PORT_WSEL_CPP 0x00004000
/* Error events exceptions */
#define FM_EX_KG_DOUBLE_ECC 0x80000000
#define FM_EX_KG_KEYSIZE_OVERFLOW 0x40000000
/* Scheme Registers bit field masks */
#define KG_SCH_MODE_EN 0x80000000
#define KG_SCH_VSP_NO_KSP_EN 0x80000000
#define KG_SCH_HASH_CONFIG_SYM 0x40000000
/* Known Protocol field codes */
#define KG_SCH_KN_PORT_ID 0x80000000
#define KG_SCH_KN_MACDST 0x40000000
#define KG_SCH_KN_MACSRC 0x20000000
#define KG_SCH_KN_TCI1 0x10000000
#define KG_SCH_KN_TCI2 0x08000000
#define KG_SCH_KN_ETYPE 0x04000000
#define KG_SCH_KN_PPPSID 0x02000000
#define KG_SCH_KN_PPPID 0x01000000
#define KG_SCH_KN_MPLS1 0x00800000
#define KG_SCH_KN_MPLS2 0x00400000
#define KG_SCH_KN_MPLS_LAST 0x00200000
#define KG_SCH_KN_IPSRC1 0x00100000
#define KG_SCH_KN_IPDST1 0x00080000
#define KG_SCH_KN_PTYPE1 0x00040000
#define KG_SCH_KN_IPTOS_TC1 0x00020000
#define KG_SCH_KN_IPV6FL1 0x00010000
#define KG_SCH_KN_IPSRC2 0x00008000
#define KG_SCH_KN_IPDST2 0x00004000
#define KG_SCH_KN_PTYPE2 0x00002000
#define KG_SCH_KN_IPTOS_TC2 0x00001000
#define KG_SCH_KN_IPV6FL2 0x00000800
#define KG_SCH_KN_GREPTYPE 0x00000400
#define KG_SCH_KN_IPSEC_SPI 0x00000200
#define KG_SCH_KN_IPSEC_NH 0x00000100
#define KG_SCH_KN_IPPID 0x00000080
#define KG_SCH_KN_L4PSRC 0x00000004
#define KG_SCH_KN_L4PDST 0x00000002
#define KG_SCH_KN_TFLG 0x00000001
/* NIA values */
#define NIA_ENG_BMI 0x00500000
#define NIA_BMI_AC_ENQ_FRAME 0x00000002
#define ENQUEUE_KG_DFLT_NIA (NIA_ENG_BMI | NIA_BMI_AC_ENQ_FRAME)
/* Hard-coded configuration:
* These values are used as hard-coded values for KeyGen configuration
* and they replace user selections for this hard-coded version
*/
/* Hash distribution shift */
#define DEFAULT_HASH_DIST_FQID_SHIFT 0
/* Hash shift */
#define DEFAULT_HASH_SHIFT 0
/* Symmetric hash usage:
* Warning:
* - the value for symmetric hash usage must be in accordance with hash
* key defined below
* - according to tests performed, spreading is not working if symmetric
* hash is set on true
* So ultimately symmetric hash functionality should be always disabled:
*/
#define DEFAULT_SYMMETRIC_HASH false
/* Hash Key extraction fields: */
#define DEFAULT_HASH_KEY_EXTRACT_FIELDS \
(KG_SCH_KN_IPSRC1 | KG_SCH_KN_IPDST1 | \
KG_SCH_KN_L4PSRC | KG_SCH_KN_L4PDST)
/* Default values to be used as hash key in case IPv4 or L4 (TCP, UDP)
* don't exist in the frame
*/
/* Default IPv4 address */
#define DEFAULT_HASH_KEY_IPv4_ADDR 0x0A0A0A0A
/* Default L4 port */
#define DEFAULT_HASH_KEY_L4_PORT 0x0B0B0B0B
/* KeyGen Memory Mapped Registers: */
/* Scheme Configuration RAM Registers */
struct fman_kg_scheme_regs {
u32 kgse_mode; /* 0x100: MODE */
u32 kgse_ekfc; /* 0x104: Extract Known Fields Command */
u32 kgse_ekdv; /* 0x108: Extract Known Default Value */
u32 kgse_bmch; /* 0x10C: Bit Mask Command High */
u32 kgse_bmcl; /* 0x110: Bit Mask Command Low */
u32 kgse_fqb; /* 0x114: Frame Queue Base */
u32 kgse_hc; /* 0x118: Hash Command */
u32 kgse_ppc; /* 0x11C: Policer Profile Command */
u32 kgse_gec[FM_KG_NUM_OF_GENERIC_REGS];
/* 0x120: Generic Extract Command */
u32 kgse_spc;
/* 0x140: KeyGen Scheme Entry Statistic Packet Counter */
u32 kgse_dv0; /* 0x144: KeyGen Scheme Entry Default Value 0 */
u32 kgse_dv1; /* 0x148: KeyGen Scheme Entry Default Value 1 */
u32 kgse_ccbs;
/* 0x14C: KeyGen Scheme Entry Coarse Classification Bit*/
u32 kgse_mv; /* 0x150: KeyGen Scheme Entry Match vector */
u32 kgse_om; /* 0x154: KeyGen Scheme Entry Operation Mode bits */
u32 kgse_vsp;
/* 0x158: KeyGen Scheme Entry Virtual Storage Profile */
};
/* Port Partition Configuration Registers */
struct fman_kg_pe_regs {
u32 fmkg_pe_sp; /* 0x100: KeyGen Port entry Scheme Partition */
u32 fmkg_pe_cpp;
/* 0x104: KeyGen Port Entry Classification Plan Partition */
};
/* General Configuration and Status Registers
* Global Statistic Counters
* KeyGen Global Registers
*/
struct fman_kg_regs {
u32 fmkg_gcr; /* 0x000: KeyGen General Configuration Register */
u32 res004; /* 0x004: Reserved */
u32 res008; /* 0x008: Reserved */
u32 fmkg_eer; /* 0x00C: KeyGen Error Event Register */
u32 fmkg_eeer; /* 0x010: KeyGen Error Event Enable Register */
u32 res014; /* 0x014: Reserved */
u32 res018; /* 0x018: Reserved */
u32 fmkg_seer; /* 0x01C: KeyGen Scheme Error Event Register */
u32 fmkg_seeer; /* 0x020: KeyGen Scheme Error Event Enable Register */
u32 fmkg_gsr; /* 0x024: KeyGen Global Status Register */
u32 fmkg_tpc; /* 0x028: Total Packet Counter Register */
u32 fmkg_serc; /* 0x02C: Soft Error Capture Register */
u32 res030[4]; /* 0x030: Reserved */
u32 fmkg_fdor; /* 0x034: Frame Data Offset Register */
u32 fmkg_gdv0r; /* 0x038: Global Default Value Register 0 */
u32 fmkg_gdv1r; /* 0x03C: Global Default Value Register 1 */
u32 res04c[6]; /* 0x040: Reserved */
u32 fmkg_feer; /* 0x044: Force Error Event Register */
u32 res068[38]; /* 0x048: Reserved */
union {
u32 fmkg_indirect[63]; /* 0x100: Indirect Access Registers */
struct fman_kg_scheme_regs fmkg_sch; /* Scheme Registers */
struct fman_kg_pe_regs fmkg_pe; /* Port Partition Registers */
};
u32 fmkg_ar; /* 0x1FC: KeyGen Action Register */
};
/* KeyGen Scheme data */
struct keygen_scheme {
bool used; /* Specifies if this scheme is used */
u8 hw_port_id;
/* Hardware port ID
* schemes sharing between multiple ports is not
* currently supported
* so we have only one port id bound to a scheme
*/
u32 base_fqid;
/* Base FQID:
* Must be between 1 and 2^24-1
* If hash is used and an even distribution is
* expected according to hash_fqid_count,
* base_fqid must be aligned to hash_fqid_count
*/
u32 hash_fqid_count;
/* FQ range for hash distribution:
* Must be a power of 2
* Represents the range of queues for spreading
*/
bool use_hashing; /* Usage of Hashing and spreading over FQ */
bool symmetric_hash; /* Symmetric Hash option usage */
u8 hashShift;
/* Hash result right shift.
* Select the 24 bits out of the 64 hash result.
* 0 means using the 24 LSB's, otherwise
* use the 24 LSB's after shifting right
*/
u32 match_vector; /* Match Vector */
};
/* KeyGen driver data */
struct fman_keygen {
struct keygen_scheme schemes[FM_KG_MAX_NUM_OF_SCHEMES];
/* Array of schemes */
struct fman_kg_regs __iomem *keygen_regs; /* KeyGen registers */
};
/* keygen_write_ar_wait
*
* Write Action Register with specified value, wait for GO bit field to be
* idle and then read the error
*
* regs: KeyGen registers
* fmkg_ar: Action Register value
*
* Return: Zero for success or error code in case of failure
*/
static int keygen_write_ar_wait(struct fman_kg_regs __iomem *regs, u32 fmkg_ar)
{
iowrite32be(fmkg_ar, &regs->fmkg_ar);
/* Wait for GO bit field to be idle */
while (fmkg_ar & FM_KG_KGAR_GO)
fmkg_ar = ioread32be(&regs->fmkg_ar);
if (fmkg_ar & FM_KG_KGAR_ERR)
return -EINVAL;
return 0;
}
/* build_ar_scheme
*
* Build Action Register value for scheme settings
*
* scheme_id: Scheme ID
* update_counter: update scheme counter
* write: true for action to write the scheme or false for read action
*
* Return: AR value
*/
static u32 build_ar_scheme(u8 scheme_id, bool update_counter, bool write)
{
u32 rw = (u32)(write ? FM_KG_KGAR_WRITE : FM_KG_KGAR_READ);
return (u32)(FM_KG_KGAR_GO |
rw |
FM_KG_KGAR_SEL_SCHEME_ENTRY |
DUMMY_PORT_ID |
((u32)scheme_id << FM_KG_KGAR_NUM_SHIFT) |
(update_counter ? FM_KG_KGAR_SCM_WSEL_UPDATE_CNT : 0));
}
/* build_ar_bind_scheme
*
* Build Action Register value for port binding to schemes
*
* hwport_id: HW Port ID
* write: true for action to write the bind or false for read action
*
* Return: AR value
*/
static u32 build_ar_bind_scheme(u8 hwport_id, bool write)
{
u32 rw = write ? (u32)FM_KG_KGAR_WRITE : (u32)FM_KG_KGAR_READ;
return (u32)(FM_KG_KGAR_GO |
rw |
FM_KG_KGAR_SEL_PORT_ENTRY |
hwport_id |
FM_KG_KGAR_SEL_PORT_WSEL_SP);
}
/* keygen_write_sp
*
* Write Scheme Partition Register with specified value
*
* regs: KeyGen Registers
* sp: Scheme Partition register value
* add: true to add a scheme partition or false to clear
*
* Return: none
*/
static void keygen_write_sp(struct fman_kg_regs __iomem *regs, u32 sp, bool add)
{
u32 tmp;
tmp = ioread32be(&regs->fmkg_pe.fmkg_pe_sp);
if (add)
tmp |= sp;
else
tmp &= ~sp;
iowrite32be(tmp, &regs->fmkg_pe.fmkg_pe_sp);
}
/* build_ar_bind_cls_plan
*
* Build Action Register value for Classification Plan
*
* hwport_id: HW Port ID
* write: true for action to write the CP or false for read action
*
* Return: AR value
*/
static u32 build_ar_bind_cls_plan(u8 hwport_id, bool write)
{
u32 rw = write ? (u32)FM_KG_KGAR_WRITE : (u32)FM_KG_KGAR_READ;
return (u32)(FM_KG_KGAR_GO |
rw |
FM_KG_KGAR_SEL_PORT_ENTRY |
hwport_id |
FM_KG_KGAR_SEL_PORT_WSEL_CPP);
}
/* keygen_write_cpp
*
* Write Classification Plan Partition Register with specified value
*
* regs: KeyGen Registers
* cpp: CPP register value
*
* Return: none
*/
static void keygen_write_cpp(struct fman_kg_regs __iomem *regs, u32 cpp)
{
iowrite32be(cpp, &regs->fmkg_pe.fmkg_pe_cpp);
}
/* keygen_write_scheme
*
* Write all Schemes Registers with specified values
*
* regs: KeyGen Registers
* scheme_id: Scheme ID
* scheme_regs: Scheme registers values desired to be written
* update_counter: update scheme counter
*
* Return: Zero for success or error code in case of failure
*/
static int keygen_write_scheme(struct fman_kg_regs __iomem *regs, u8 scheme_id,
struct fman_kg_scheme_regs *scheme_regs,
bool update_counter)
{
u32 ar_reg;
int err, i;
/* Write indirect scheme registers */
iowrite32be(scheme_regs->kgse_mode, &regs->fmkg_sch.kgse_mode);
iowrite32be(scheme_regs->kgse_ekfc, &regs->fmkg_sch.kgse_ekfc);
iowrite32be(scheme_regs->kgse_ekdv, &regs->fmkg_sch.kgse_ekdv);
iowrite32be(scheme_regs->kgse_bmch, &regs->fmkg_sch.kgse_bmch);
iowrite32be(scheme_regs->kgse_bmcl, &regs->fmkg_sch.kgse_bmcl);
iowrite32be(scheme_regs->kgse_fqb, &regs->fmkg_sch.kgse_fqb);
iowrite32be(scheme_regs->kgse_hc, &regs->fmkg_sch.kgse_hc);
iowrite32be(scheme_regs->kgse_ppc, &regs->fmkg_sch.kgse_ppc);
iowrite32be(scheme_regs->kgse_spc, &regs->fmkg_sch.kgse_spc);
iowrite32be(scheme_regs->kgse_dv0, &regs->fmkg_sch.kgse_dv0);
iowrite32be(scheme_regs->kgse_dv1, &regs->fmkg_sch.kgse_dv1);
iowrite32be(scheme_regs->kgse_ccbs, &regs->fmkg_sch.kgse_ccbs);
iowrite32be(scheme_regs->kgse_mv, &regs->fmkg_sch.kgse_mv);
iowrite32be(scheme_regs->kgse_om, &regs->fmkg_sch.kgse_om);
iowrite32be(scheme_regs->kgse_vsp, &regs->fmkg_sch.kgse_vsp);
for (i = 0 ; i < FM_KG_NUM_OF_GENERIC_REGS ; i++)
iowrite32be(scheme_regs->kgse_gec[i],
&regs->fmkg_sch.kgse_gec[i]);
/* Write AR (Action register) */
ar_reg = build_ar_scheme(scheme_id, update_counter, true);
err = keygen_write_ar_wait(regs, ar_reg);
if (err != 0) {
pr_err("Writing Action Register failed\n");
return err;
}
return err;
}
/* get_free_scheme_id
*
* Find the first free scheme available to be used
*
* keygen: KeyGen handle
* scheme_id: pointer to scheme id
*
* Return: 0 on success, -EINVAL when the are no available free schemes
*/
static int get_free_scheme_id(struct fman_keygen *keygen, u8 *scheme_id)
{
u8 i;
for (i = 0; i < FM_KG_MAX_NUM_OF_SCHEMES; i++)
if (!keygen->schemes[i].used) {
*scheme_id = i;
return 0;
}
return -EINVAL;
}
/* get_scheme
*
* Provides the scheme for specified ID
*
* keygen: KeyGen handle
* scheme_id: Scheme ID
*
* Return: handle to required scheme
*/
static struct keygen_scheme *get_scheme(struct fman_keygen *keygen,
u8 scheme_id)
{
if (scheme_id >= FM_KG_MAX_NUM_OF_SCHEMES)
return NULL;
return &keygen->schemes[scheme_id];
}
/* keygen_bind_port_to_schemes
*
* Bind the port to schemes
*
* keygen: KeyGen handle
* scheme_id: id of the scheme to bind to
* bind: true to bind the port or false to unbind it
*
* Return: Zero for success or error code in case of failure
*/
static int keygen_bind_port_to_schemes(struct fman_keygen *keygen,
u8 scheme_id,
bool bind)
{
struct fman_kg_regs __iomem *keygen_regs = keygen->keygen_regs;
struct keygen_scheme *scheme;
u32 ar_reg;
u32 schemes_vector = 0;
int err;
scheme = get_scheme(keygen, scheme_id);
if (!scheme) {
pr_err("Requested Scheme does not exist\n");
return -EINVAL;
}
if (!scheme->used) {
pr_err("Cannot bind port to an invalid scheme\n");
return -EINVAL;
}
schemes_vector |= 1 << (31 - scheme_id);
ar_reg = build_ar_bind_scheme(scheme->hw_port_id, false);
err = keygen_write_ar_wait(keygen_regs, ar_reg);
if (err != 0) {
pr_err("Reading Action Register failed\n");
return err;
}
keygen_write_sp(keygen_regs, schemes_vector, bind);
ar_reg = build_ar_bind_scheme(scheme->hw_port_id, true);
err = keygen_write_ar_wait(keygen_regs, ar_reg);
if (err != 0) {
pr_err("Writing Action Register failed\n");
return err;
}
return 0;
}
/* keygen_scheme_setup
*
* Setup the scheme according to required configuration
*
* keygen: KeyGen handle
* scheme_id: scheme ID
* enable: true to enable scheme or false to disable it
*
* Return: Zero for success or error code in case of failure
*/
static int keygen_scheme_setup(struct fman_keygen *keygen, u8 scheme_id,
bool enable)
{
struct fman_kg_regs __iomem *keygen_regs = keygen->keygen_regs;
struct fman_kg_scheme_regs scheme_regs;
struct keygen_scheme *scheme;
u32 tmp_reg;
int err;
scheme = get_scheme(keygen, scheme_id);
if (!scheme) {
pr_err("Requested Scheme does not exist\n");
return -EINVAL;
}
if (enable && scheme->used) {
pr_err("The requested Scheme is already used\n");
return -EINVAL;
}
/* Clear scheme registers */
memset(&scheme_regs, 0, sizeof(struct fman_kg_scheme_regs));
/* Setup all scheme registers: */
tmp_reg = 0;
if (enable) {
/* Enable Scheme */
tmp_reg |= KG_SCH_MODE_EN;
/* Enqueue frame NIA */
tmp_reg |= ENQUEUE_KG_DFLT_NIA;
}
scheme_regs.kgse_mode = tmp_reg;
scheme_regs.kgse_mv = scheme->match_vector;
/* Scheme don't override StorageProfile:
* valid only for DPAA_VERSION >= 11
*/
scheme_regs.kgse_vsp = KG_SCH_VSP_NO_KSP_EN;
/* Configure Hard-Coded Rx Hashing: */
if (scheme->use_hashing) {
/* configure kgse_ekfc */
scheme_regs.kgse_ekfc = DEFAULT_HASH_KEY_EXTRACT_FIELDS;
/* configure kgse_ekdv */
tmp_reg = 0;
tmp_reg |= (KG_SCH_DEF_USE_KGSE_DV_0 <<
KG_SCH_DEF_IP_ADDR_SHIFT);
tmp_reg |= (KG_SCH_DEF_USE_KGSE_DV_1 <<
KG_SCH_DEF_L4_PORT_SHIFT);
scheme_regs.kgse_ekdv = tmp_reg;
/* configure kgse_dv0 */
scheme_regs.kgse_dv0 = DEFAULT_HASH_KEY_IPv4_ADDR;
/* configure kgse_dv1 */
scheme_regs.kgse_dv1 = DEFAULT_HASH_KEY_L4_PORT;
/* configure kgse_hc */
tmp_reg = 0;
tmp_reg |= ((scheme->hash_fqid_count - 1) <<
DEFAULT_HASH_DIST_FQID_SHIFT);
tmp_reg |= scheme->hashShift << KG_SCH_HASH_CONFIG_SHIFT_SHIFT;
if (scheme->symmetric_hash) {
/* Normally extraction key should be verified if
* complies with symmetric hash
* But because extraction is hard-coded, we are sure
* the key is symmetric
*/
tmp_reg |= KG_SCH_HASH_CONFIG_SYM;
}
scheme_regs.kgse_hc = tmp_reg;
} else {
scheme_regs.kgse_ekfc = 0;
scheme_regs.kgse_hc = 0;
scheme_regs.kgse_ekdv = 0;
scheme_regs.kgse_dv0 = 0;
scheme_regs.kgse_dv1 = 0;
}
/* configure kgse_fqb: Scheme FQID base */
tmp_reg = 0;
tmp_reg |= scheme->base_fqid;
scheme_regs.kgse_fqb = tmp_reg;
/* features not used by hard-coded configuration */
scheme_regs.kgse_bmch = 0;
scheme_regs.kgse_bmcl = 0;
scheme_regs.kgse_spc = 0;
/* Write scheme registers */
err = keygen_write_scheme(keygen_regs, scheme_id, &scheme_regs, true);
if (err != 0) {
pr_err("Writing scheme registers failed\n");
return err;
}
/* Update used field for Scheme */
scheme->used = enable;
return 0;
}
/* keygen_init
*
* KeyGen initialization:
* Initializes and enables KeyGen, allocate driver memory, setup registers,
* clear port bindings, invalidate all schemes
*
* keygen_regs: KeyGen registers base address
*
* Return: Handle to KeyGen driver
*/
struct fman_keygen *keygen_init(struct fman_kg_regs __iomem *keygen_regs)
{
struct fman_keygen *keygen;
u32 ar;
int i;
/* Allocate memory for KeyGen driver */
keygen = kzalloc(sizeof(*keygen), GFP_KERNEL);
if (!keygen)
return NULL;
keygen->keygen_regs = keygen_regs;
/* KeyGen initialization (for Master partition):
* Setup KeyGen registers
*/
iowrite32be(ENQUEUE_KG_DFLT_NIA, &keygen_regs->fmkg_gcr);
iowrite32be(FM_EX_KG_DOUBLE_ECC | FM_EX_KG_KEYSIZE_OVERFLOW,
&keygen_regs->fmkg_eer);
iowrite32be(0, &keygen_regs->fmkg_fdor);
iowrite32be(0, &keygen_regs->fmkg_gdv0r);
iowrite32be(0, &keygen_regs->fmkg_gdv1r);
/* Clear binding between ports to schemes and classification plans
* so that all ports are not bound to any scheme/classification plan
*/
for (i = 0; i < FMAN_MAX_NUM_OF_HW_PORTS; i++) {
/* Clear all pe sp schemes registers */
keygen_write_sp(keygen_regs, 0xffffffff, false);
ar = build_ar_bind_scheme(i, true);
keygen_write_ar_wait(keygen_regs, ar);
/* Clear all pe cpp classification plans registers */
keygen_write_cpp(keygen_regs, 0);
ar = build_ar_bind_cls_plan(i, true);
keygen_write_ar_wait(keygen_regs, ar);
}
/* Enable all scheme interrupts */
iowrite32be(0xFFFFFFFF, &keygen_regs->fmkg_seer);
iowrite32be(0xFFFFFFFF, &keygen_regs->fmkg_seeer);
/* Enable KyeGen */
iowrite32be(ioread32be(&keygen_regs->fmkg_gcr) | FM_KG_KGGCR_EN,
&keygen_regs->fmkg_gcr);
return keygen;
}
EXPORT_SYMBOL(keygen_init);
/* keygen_port_hashing_init
*
* Initializes a port for Rx Hashing with specified configuration parameters
*
* keygen: KeyGen handle
* hw_port_id: HW Port ID
* hash_base_fqid: Hashing Base FQID used for spreading
* hash_size: Hashing size
*
* Return: Zero for success or error code in case of failure
*/
int keygen_port_hashing_init(struct fman_keygen *keygen, u8 hw_port_id,
u32 hash_base_fqid, u32 hash_size)
{
struct keygen_scheme *scheme;
u8 scheme_id;
int err;
/* Validate Scheme configuration parameters */
if (hash_base_fqid == 0 || (hash_base_fqid & ~0x00FFFFFF)) {
pr_err("Base FQID must be between 1 and 2^24-1\n");
return -EINVAL;
}
if (hash_size == 0 || (hash_size & (hash_size - 1)) != 0) {
pr_err("Hash size must be power of two\n");
return -EINVAL;
}
/* Find a free scheme */
err = get_free_scheme_id(keygen, &scheme_id);
if (err) {
pr_err("The maximum number of available Schemes has been exceeded\n");
return -EINVAL;
}
/* Create and configure Hard-Coded Scheme: */
scheme = get_scheme(keygen, scheme_id);
if (!scheme) {
pr_err("Requested Scheme does not exist\n");
return -EINVAL;
}
if (scheme->used) {
pr_err("The requested Scheme is already used\n");
return -EINVAL;
}
/* Clear all scheme fields because the scheme may have been
* previously used
*/
memset(scheme, 0, sizeof(struct keygen_scheme));
/* Setup scheme: */
scheme->hw_port_id = hw_port_id;
scheme->use_hashing = true;
scheme->base_fqid = hash_base_fqid;
scheme->hash_fqid_count = hash_size;
scheme->symmetric_hash = DEFAULT_SYMMETRIC_HASH;
scheme->hashShift = DEFAULT_HASH_SHIFT;
/* All Schemes in hard-coded configuration
* are Indirect Schemes
*/
scheme->match_vector = 0;
err = keygen_scheme_setup(keygen, scheme_id, true);
if (err != 0) {
pr_err("Scheme setup failed\n");
return err;
}
/* Bind Rx port to Scheme */
err = keygen_bind_port_to_schemes(keygen, scheme_id, true);
if (err != 0) {
pr_err("Binding port to schemes failed\n");
return err;
}
return 0;
}
EXPORT_SYMBOL(keygen_port_hashing_init);
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