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u-boot/arch/mips/mach-octeon/cvmx-pko3-compat.c
Aaron Williams 53a422cc50 mips: octeon: Add cvmx-pko3-compat.c 
Import cvmx-pko3-compat.c from 2013 U-Boot. It will be used by the later
added drivers to support networking on the MIPS Octeon II / III
platforms.

Signed-off-by: Aaron Williams <awilliams@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2022-05-04 03:38:21 +02:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018-2022 Marvell International Ltd.
*
*/
#include <errno.h>
#include <log.h>
#include <time.h>
#include <linux/delay.h>
#include <mach/cvmx-regs.h>
#include <mach/cvmx-csr.h>
#include <mach/cvmx-bootmem.h>
#include <mach/octeon-model.h>
#include <mach/cvmx-fuse.h>
#include <mach/octeon-feature.h>
#include <mach/cvmx-qlm.h>
#include <mach/octeon_qlm.h>
#include <mach/cvmx-pcie.h>
#include <mach/cvmx-coremask.h>
#include <mach/cvmx-agl-defs.h>
#include <mach/cvmx-bgxx-defs.h>
#include <mach/cvmx-ciu-defs.h>
#include <mach/cvmx-gmxx-defs.h>
#include <mach/cvmx-gserx-defs.h>
#include <mach/cvmx-ilk-defs.h>
#include <mach/cvmx-ipd-defs.h>
#include <mach/cvmx-pcsx-defs.h>
#include <mach/cvmx-pcsxx-defs.h>
#include <mach/cvmx-pki-defs.h>
#include <mach/cvmx-pko-defs.h>
#include <mach/cvmx-xcv-defs.h>
#include <mach/cvmx-scratch.h>
#include <mach/cvmx-hwfau.h>
#include <mach/cvmx-fau.h>
#include <mach/cvmx-hwpko.h>
#include <mach/cvmx-ilk.h>
#include <mach/cvmx-pki.h>
#include <mach/cvmx-pko3.h>
#include <mach/cvmx-pko3-queue.h>
#include <mach/cvmx-pko3-resources.h>
#include <mach/cvmx-helper.h>
#include <mach/cvmx-helper-board.h>
#include <mach/cvmx-helper-cfg.h>
#include <mach/cvmx-helper-bgx.h>
#include <mach/cvmx-helper-cfg.h>
#include <mach/cvmx-helper-util.h>
#include <mach/cvmx-helper-pki.h>
/* #undef CVMX_ENABLE_PARAMETER_CHECKING */
/* #define CVMX_ENABLE_PARAMETER_CHECKING 1 */
/* #define __PKO3_NATIVE_PTR */
static inline u64 cvmx_pko3_legacy_paddr(unsigned int node, u64 addr)
{
u64 paddr;
paddr = node;
paddr = (addr & ((1ull << 40) - 1)) | (paddr << 40);
return paddr;
}
#if CVMX_ENABLE_PARAMETER_CHECKING
/**
* @INTERNAL
*
* Verify the integrity of a legacy buffer link pointer,
*
* Note that the IPD/PIP/PKO hardware would sometimes
* round-up the buf_ptr->size field of the last buffer in a chain to the next
* cache line size, so the sum of buf_ptr->size
* fields for a packet may exceed total_bytes by up to 127 bytes.
*
* @returns 0 on success, a negative number on error.
*/
static int cvmx_pko3_legacy_bufptr_validate(cvmx_buf_ptr_t buf_ptr,
unsigned int gather,
unsigned int buffers,
unsigned int total_bytes)
{
unsigned int node = cvmx_get_node_num();
unsigned int segs = 0, bytes = 0;
unsigned int phys_addr;
cvmx_buf_ptr_t ptr;
int delta;
if (buffers == 0) {
return -1;
} else if (buffers == 1) {
delta = buf_ptr.s.size - total_bytes;
if (delta < 0 || delta > 127)
return -2;
} else if (gather) {
cvmx_buf_ptr_t *vptr;
/* Validate gather list */
if (buf_ptr.s.size < buffers)
return -3;
phys_addr = cvmx_pko3_legacy_paddr(node, buf_ptr.s.addr);
vptr = cvmx_phys_to_ptr(phys_addr);
for (segs = 0; segs < buffers; segs++)
bytes += vptr[segs].s.size;
delta = bytes - total_bytes;
if (delta < 0 || delta > 127)
return -4;
} else {
void *vptr;
/* Validate linked buffers */
ptr = buf_ptr;
for (segs = 0; segs < buffers; segs++) {
bytes += ptr.s.size;
phys_addr = cvmx_pko3_legacy_paddr(node, ptr.s.addr);
vptr = cvmx_phys_to_ptr(phys_addr);
memcpy(&ptr, vptr - sizeof(u64), sizeof(u64));
}
delta = bytes - total_bytes;
if (delta < 0 || delta > 127)
return -5;
}
return 0;
}
#endif /* CVMX_ENABLE_PARAMETER_CHECKING */
/*
* @INTERNAL
*
* Implementation note:
* When the packet is sure to not need a jump_buf,
* it will be written directly into cvmseg.
* When the packet might not fit into cvmseg with all
* of its descriptors, a jump_buf is allocated a priori,
* and only header is first placed into cvmseg, all other
* descriptors are placed into jump_buf, and finally
* the PKO_SEND_JUMP_S is written to cvmseg.
* This is because if there are no EXT or TSO descriptors,
* then HDR must be first, and JMP second and that is all
* that should go into cvmseg.
*/
struct __cvmx_pko3_legacy_desc {
u64 *cmd_words;
u64 *jump_buf_base_ptr;
unsigned short word_count;
short last_pool;
u8 port_node;
u8 aura_node;
u8 jump_buf_size;
};
/**
* @INTERNAL
*
* Add a subdescriptor into a command buffer,
* and handle command-buffer overflow by allocating a JUMP_s buffer
* from PKO3 internal AURA.
*/
static int __cvmx_pko3_cmd_subdc_add(struct __cvmx_pko3_legacy_desc *desc,
u64 subdc)
{
/* SEND_JUMP_S missing on Pass1.X */
if (desc->word_count >= 15) {
printf("%s: ERROR: too many segments\n", __func__);
return -EBADF;
}
/* Handle small commands simply */
if (cvmx_likely(!desc->jump_buf_base_ptr)) {
desc->cmd_words[desc->word_count] = subdc;
(desc->word_count)++;
return desc->word_count;
}
if (cvmx_unlikely(desc->jump_buf_size >= 255))
return -ENOMEM;
desc->jump_buf_base_ptr[desc->jump_buf_size++] = subdc;
return desc->word_count + desc->jump_buf_size;
}
/**
* @INTERNAL
*
* Finalize command buffer
*
* @returns: number of command words in command buffer and jump buffer
* or negative number on error.
*/
static int __cvmx_pko3_cmd_done(struct __cvmx_pko3_legacy_desc *desc)
{
short pko_aura;
cvmx_pko_buf_ptr_t jump_s;
cvmx_pko_send_aura_t aura_s;
/* no jump buffer, nothing to do */
if (!desc->jump_buf_base_ptr)
return desc->word_count;
desc->word_count++;
/* Verify number of words is 15 */
if (desc->word_count != 2) {
printf("ERROR: %s: internal error, word_count=%d\n", __func__,
desc->word_count);
return -EINVAL;
}
/* Add SEND_AURA_S at the end of jump_buf */
pko_aura = __cvmx_pko3_aura_get(desc->port_node);
aura_s.u64 = 0;
aura_s.s.aura = pko_aura;
aura_s.s.offset = 0;
aura_s.s.alg = AURAALG_NOP;
aura_s.s.subdc4 = CVMX_PKO_SENDSUBDC_AURA;
desc->jump_buf_base_ptr[desc->jump_buf_size++] = aura_s.u64;
/* Add SEND_JUMPS to point to jump_buf */
jump_s.u64 = 0;
jump_s.s.subdc3 = CVMX_PKO_SENDSUBDC_JUMP;
jump_s.s.addr = cvmx_ptr_to_phys(desc->jump_buf_base_ptr);
jump_s.s.i = 1; /* F=1: Free this buffer when done */
jump_s.s.size = desc->jump_buf_size;
desc->cmd_words[1] = jump_s.u64;
return desc->word_count + desc->jump_buf_size;
}
/**
* @INTERNAL
*
* Handle buffer pools for PKO legacy transmit operation
*/
static inline int cvmx_pko3_legacy_pool(struct __cvmx_pko3_legacy_desc *desc,
int pool)
{
cvmx_pko_send_aura_t aura_s;
unsigned int aura;
if (cvmx_unlikely(desc->last_pool == pool))
return 0;
aura = desc->aura_node << 10; /* LAURA=AURA[0..9] */
aura |= pool;
if (cvmx_likely(desc->last_pool < 0)) {
cvmx_pko_send_hdr_t *hdr_s;
hdr_s = (void *)&desc->cmd_words[0];
/* Create AURA from legacy pool (assume LAURA==POOL */
hdr_s->s.aura = aura;
desc->last_pool = pool;
return 0;
}
aura_s.u64 = 0;
aura_s.s.subdc4 = CVMX_PKO_SENDSUBDC_AURA;
aura_s.s.offset = 0;
aura_s.s.alg = AURAALG_NOP;
aura |= pool;
aura_s.s.aura = aura;
desc->last_pool = pool;
return __cvmx_pko3_cmd_subdc_add(desc, aura_s.u64);
}
/**
* @INTERNAL
*
* Backward compatibility for packet transmission using legacy PKO command.
*
* NOTE: Only supports output on node-local ports.
*
* TBD: Could embed destination node in extended DQ number.
*/
cvmx_pko_return_value_t
cvmx_pko3_legacy_xmit(unsigned int dq, cvmx_pko_command_word0_t pko_command,
cvmx_buf_ptr_t packet, u64 addr, bool tag_sw)
{
cvmx_pko_query_rtn_t pko_status;
cvmx_pko_send_hdr_t *hdr_s;
struct __cvmx_pko3_legacy_desc desc;
u8 *data_ptr;
unsigned int node, seg_cnt;
int res;
cvmx_buf_ptr_pki_t bptr;
seg_cnt = pko_command.s.segs;
desc.cmd_words = cvmx_pko3_cvmseg_addr();
/* Allocate from local aura, assume all old-pools are local */
node = cvmx_get_node_num();
desc.aura_node = node;
/* Derive destination node from dq */
desc.port_node = dq >> 10;
dq &= (1 << 10) - 1;
desc.word_count = 1;
desc.last_pool = -1;
/* For small packets, write descriptors directly to CVMSEG
* but for longer packets use jump_buf
*/
if (seg_cnt < 7 || OCTEON_IS_MODEL(OCTEON_CN78XX_PASS1_X)) {
desc.jump_buf_size = 0;
desc.jump_buf_base_ptr = NULL;
} else {
unsigned int pko_aura = __cvmx_pko3_aura_get(desc.port_node);
cvmx_fpa3_gaura_t aura =
__cvmx_fpa3_gaura(pko_aura >> 10, pko_aura & 0x3ff);
/* Allocate from internal AURA, size is 4KiB */
desc.jump_buf_base_ptr = cvmx_fpa3_alloc(aura);
if (!desc.jump_buf_base_ptr)
return -ENOMEM;
desc.jump_buf_size = 0;
}
/* Native buffer-pointer for error checiing */
bptr.u64 = packet.u64;
#if CVMX_ENABLE_PARAMETER_CHECKING
if (seg_cnt == 1 && bptr.size == pko_command.s.total_bytes) {
/*
* Special case for native buffer pointer:
* This is the only case where the native pointer-style can be
* automatically identified, that is when an entire packet
* fits into a single buffer by the PKI.
* The use of the native buffers with this function
* should be avoided.
*/
debug("%s: WARNING: Native buffer-pointer\n", __func__);
} else {
/* The buffer ptr is assume to be received in legacy format */
res = cvmx_pko3_legacy_bufptr_validate(
packet, pko_command.s.gather, pko_command.s.segs,
pko_command.s.total_bytes);
if (res < 0) {
debug("%s: ERROR: Not a valid packet pointer <%d>\n",
__func__, res);
return CVMX_PKO_CMD_QUEUE_INIT_ERROR;
}
}
#endif /* CVMX_ENABLE_PARAMETER_CHECKING */
/* Squash warnings */
(void)bptr;
/*** Translate legacy PKO fields into PKO3 PKO_SEND_HDR_S ***/
/* PKO_SEND_HDR_S is alwasy the first word in the command */
hdr_s = (void *)&desc.cmd_words[0];
hdr_s->u64 = 0;
/* Copy total packet size */
hdr_s->s.total = pko_command.s.total_bytes;
/* Endianness */
hdr_s->s.le = pko_command.s.le;
/* N2 is the same meaning */
if (OCTEON_IS_MODEL(OCTEON_CN78XX_PASS1_X))
hdr_s->s.n2 = 0; /* L2 allocate everything */
else
hdr_s->s.n2 = pko_command.s.n2;
/* DF bit has the same meaning */
hdr_s->s.df = pko_command.s.dontfree;
/* II bit has the same meaning */
hdr_s->s.ii = pko_command.s.ignore_i;
/* non-zero IP header offset requires L3/L4 checksum calculation */
if (cvmx_unlikely(pko_command.s.ipoffp1 > 0)) {
u8 ipoff, ip0, l4_proto = 0;
/* Get data pointer for header inspection below */
if (pko_command.s.gather) {
cvmx_buf_ptr_t *p_ptr;
cvmx_buf_ptr_t blk;
p_ptr = cvmx_phys_to_ptr(
cvmx_pko3_legacy_paddr(node, packet.s.addr));
blk = p_ptr[0];
data_ptr = cvmx_phys_to_ptr(
cvmx_pko3_legacy_paddr(node, blk.s.addr));
} else {
data_ptr = cvmx_phys_to_ptr(
cvmx_pko3_legacy_paddr(node, packet.s.addr));
}
/* Get IP header offset */
ipoff = pko_command.s.ipoffp1 - 1;
/* Parse IP header, version, L4 protocol */
hdr_s->s.l3ptr = ipoff;
ip0 = data_ptr[ipoff];
/* IPv4 header length, checksum offload */
if ((ip0 >> 4) == 4) {
hdr_s->s.l4ptr = hdr_s->s.l3ptr + ((ip0 & 0xf) << 2);
l4_proto = data_ptr[ipoff + 9];
hdr_s->s.ckl3 = 1; /* Only valid for IPv4 */
}
/* IPv6 header length is fixed, no checksum */
if ((ip0 >> 4) == 6) {
hdr_s->s.l4ptr = hdr_s->s.l3ptr + 40;
l4_proto = data_ptr[ipoff + 6];
}
/* Set L4 checksum algo based on L4 protocol */
if (l4_proto == 6)
hdr_s->s.ckl4 = /* TCP */ 2;
else if (l4_proto == 17)
hdr_s->s.ckl4 = /* UDP */ 1;
else if (l4_proto == 132)
hdr_s->s.ckl4 = /* SCTP */ 3;
else
hdr_s->s.ckl4 = /* Unknown */ 0;
}
if (pko_command.s.gather) {
/* Process legacy gather list */
cvmx_pko_buf_ptr_t gather_s;
cvmx_buf_ptr_t *p_ptr;
cvmx_buf_ptr_t blk;
unsigned int i;
/* Get gather list pointer */
p_ptr = cvmx_phys_to_ptr(
cvmx_pko3_legacy_paddr(node, packet.s.addr));
blk = p_ptr[0];
/* setup data_ptr */
data_ptr = cvmx_phys_to_ptr(
cvmx_pko3_legacy_paddr(node, blk.s.addr));
for (i = 0; i < seg_cnt; i++) {
if (cvmx_unlikely(cvmx_pko3_legacy_pool(
&desc, blk.s.pool) < 0))
return CVMX_PKO_NO_MEMORY;
/* Insert PKO_SEND_GATHER_S for the current buffer */
gather_s.u64 = 0;
gather_s.s.subdc3 = CVMX_PKO_SENDSUBDC_GATHER;
gather_s.s.size = blk.s.size;
gather_s.s.i = blk.s.i;
gather_s.s.addr =
cvmx_pko3_legacy_paddr(node, blk.s.addr);
res = __cvmx_pko3_cmd_subdc_add(&desc, gather_s.u64);
if (res < 0)
return CVMX_PKO_NO_MEMORY;
/* get next bufptr */
blk = p_ptr[i + 1];
} /* for i */
/* Free original gather-list buffer */
if ((pko_command.s.ignore_i && !pko_command.s.dontfree) ||
packet.s.i == pko_command.s.dontfree)
cvmx_fpa_free_nosync(p_ptr, packet.s.pool,
(i - 1) / 16 + 1);
} else {
/* Process legacy linked buffer list */
cvmx_pko_buf_ptr_t gather_s;
cvmx_buf_ptr_t blk;
void *vptr;
data_ptr = cvmx_phys_to_ptr(
cvmx_pko3_legacy_paddr(node, packet.s.addr));
blk = packet;
/*
* Legacy linked-buffers converted into flat gather list
* so that the AURA can optionally be changed to reflect
* the POOL number in the legacy pointers
*/
do {
/* Insert PKO_SEND_AURA_S if pool changes */
if (cvmx_unlikely(cvmx_pko3_legacy_pool(
&desc, blk.s.pool) < 0))
return CVMX_PKO_NO_MEMORY;
/* Insert PKO_SEND_GATHER_S for the current buffer */
gather_s.u64 = 0;
gather_s.s.subdc3 = CVMX_PKO_SENDSUBDC_GATHER;
gather_s.s.size = blk.s.size;
gather_s.s.i = blk.s.i;
gather_s.s.addr =
cvmx_pko3_legacy_paddr(node, blk.s.addr);
res = __cvmx_pko3_cmd_subdc_add(&desc, gather_s.u64);
if (res < 0)
return CVMX_PKO_NO_MEMORY;
/* Get the next buffer pointer */
vptr = cvmx_phys_to_ptr(
cvmx_pko3_legacy_paddr(node, blk.s.addr));
memcpy(&blk, vptr - sizeof(blk), sizeof(blk));
/* Decrement segment count */
seg_cnt--;
} while (seg_cnt > 0);
}
/* This field indicates the presence of 3rd legacy command word */
/* NOTE: legacy 3rd word may contain CN78XX native phys addr already */
if (cvmx_unlikely(pko_command.s.rsp)) {
/* PTP bit in word3 is not supported -
* can not be distibguished from larger phys_addr[42..41]
*/
if (pko_command.s.wqp) {
/* <addr> is an SSO WQE */
cvmx_wqe_word1_t *wqe_p;
cvmx_pko_send_work_t work_s;
work_s.u64 = 0;
work_s.s.subdc4 = CVMX_PKO_SENDSUBDC_WORK;
work_s.s.addr = addr;
/* Assume WQE is legacy format too */
wqe_p = cvmx_phys_to_ptr(addr + sizeof(u64));
work_s.s.grp = wqe_p->cn38xx.grp;
work_s.s.tt = wqe_p->tag_type;
res = __cvmx_pko3_cmd_subdc_add(&desc, work_s.u64);
} else {
cvmx_pko_send_mem_t mem_s;
/* MEMALG_SET broken on Pass1 */
if (OCTEON_IS_MODEL(OCTEON_CN78XX_PASS1_0)) {
debug("%s: ERROR: PKO byte-clear not supported\n",
__func__);
}
/* <addr> is a physical address of byte clear */
mem_s.u64 = 0;
mem_s.s.subdc4 = CVMX_PKO_SENDSUBDC_MEM;
mem_s.s.addr = addr;
mem_s.s.dsz = MEMDSZ_B8;
mem_s.s.alg = MEMALG_SET;
mem_s.s.offset = 0;
res = __cvmx_pko3_cmd_subdc_add(&desc, mem_s.u64);
}
if (res < 0)
return CVMX_PKO_NO_MEMORY;
}
/* FAU counter binding reg0 */
if (pko_command.s.reg0) {
cvmx_pko_send_mem_t mem_s;
debug("%s: Legacy FAU commands: reg0=%#x sz0=%#x\n", __func__,
pko_command.s.reg0, pko_command.s.size0);
mem_s.u64 = 0;
mem_s.s.subdc4 = CVMX_PKO_SENDSUBDC_MEM;
mem_s.s.addr = cvmx_ptr_to_phys(
CASTPTR(void, __cvmx_fau_sw_addr(pko_command.s.reg0)));
if (cvmx_likely(pko_command.s.size0 == CVMX_FAU_OP_SIZE_64))
mem_s.s.dsz = MEMDSZ_B64;
else if (pko_command.s.size0 == CVMX_FAU_OP_SIZE_32)
mem_s.s.dsz = MEMDSZ_B32;
else if (pko_command.s.size0 == CVMX_FAU_OP_SIZE_16)
mem_s.s.dsz = MEMDSZ_B16;
else
mem_s.s.dsz = MEMDSZ_B8;
if (mem_s.s.dsz == MEMDSZ_B16 || mem_s.s.dsz == MEMDSZ_B8)
debug("%s: ERROR: 8/16 bit decrement unsupported",
__func__);
mem_s.s.offset = pko_command.s.subone0;
if (mem_s.s.offset)
mem_s.s.alg = MEMALG_SUB;
else
mem_s.s.alg = MEMALG_SUBLEN;
res = __cvmx_pko3_cmd_subdc_add(&desc, mem_s.u64);
if (res < 0)
return CVMX_PKO_NO_MEMORY;
}
/* FAU counter binding reg1 */
if (cvmx_unlikely(pko_command.s.reg1)) {
cvmx_pko_send_mem_t mem_s;
debug("%s: Legacy FAU commands: reg1=%#x sz1=%#x\n", __func__,
pko_command.s.reg1, pko_command.s.size1);
mem_s.u64 = 0;
mem_s.s.subdc4 = CVMX_PKO_SENDSUBDC_MEM;
mem_s.s.addr = cvmx_ptr_to_phys(
CASTPTR(void, __cvmx_fau_sw_addr(pko_command.s.reg1)));
if (cvmx_likely(pko_command.s.size1 == CVMX_FAU_OP_SIZE_64))
mem_s.s.dsz = MEMDSZ_B64;
else if (pko_command.s.size1 == CVMX_FAU_OP_SIZE_32)
mem_s.s.dsz = MEMDSZ_B32;
else if (pko_command.s.size1 == CVMX_FAU_OP_SIZE_16)
mem_s.s.dsz = MEMDSZ_B16;
else
mem_s.s.dsz = MEMDSZ_B8;
if (mem_s.s.dsz == MEMDSZ_B16 || mem_s.s.dsz == MEMDSZ_B8)
printf("%s: ERROR: 8/16 bit decrement unsupported",
__func__);
mem_s.s.offset = pko_command.s.subone1;
if (mem_s.s.offset)
mem_s.s.alg = MEMALG_SUB;
else
mem_s.s.alg = MEMALG_SUBLEN;
res = __cvmx_pko3_cmd_subdc_add(&desc, mem_s.u64);
if (res < 0)
return CVMX_PKO_NO_MEMORY;
}
/* These PKO_HDR_S fields are not used: */
/* hdr_s->s.ds does not have legacy equivalent, remains 0 */
/* hdr_s->s.format has no legacy equivalent, remains 0 */
/*** Finalize command buffer ***/
res = __cvmx_pko3_cmd_done(&desc);
if (res < 0)
return CVMX_PKO_NO_MEMORY;
/*** Send the PKO3 command into the Descriptor Queue ***/
pko_status =
__cvmx_pko3_lmtdma(desc.port_node, dq, desc.word_count, tag_sw);
/*** Map PKO3 result codes to legacy return values ***/
if (cvmx_likely(pko_status.s.dqstatus == PKO_DQSTATUS_PASS))
return CVMX_PKO_SUCCESS;
debug("%s: ERROR: failed to enqueue: %s\n", __func__,
pko_dqstatus_error(pko_status.s.dqstatus));
if (pko_status.s.dqstatus == PKO_DQSTATUS_ALREADY)
return CVMX_PKO_PORT_ALREADY_SETUP;
if (pko_status.s.dqstatus == PKO_DQSTATUS_NOFPABUF ||
pko_status.s.dqstatus == PKO_DQSTATUS_NOPKOBUF)
return CVMX_PKO_NO_MEMORY;
if (pko_status.s.dqstatus == PKO_DQSTATUS_NOTCREATED)
return CVMX_PKO_INVALID_QUEUE;
if (pko_status.s.dqstatus == PKO_DQSTATUS_BADSTATE)
return CVMX_PKO_CMD_QUEUE_INIT_ERROR;
if (pko_status.s.dqstatus == PKO_DQSTATUS_SENDPKTDROP)
return CVMX_PKO_INVALID_PORT;
return CVMX_PKO_INVALID_PORT;
}
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