// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2020 Marvell. */
#include "otx2_cpt_common.h"
#include "otx2_cptlf.h"
#include "rvu_reg.h"
#define CPT_TIMER_HOLD 0x03F
#define CPT_COUNT_HOLD 32
static void cptlf_do_set_done_time_wait(struct otx2_cptlf_info *lf,
int time_wait)
{
union otx2_cptx_lf_done_wait done_wait;
done_wait.u = otx2_cpt_read64(lf->lfs->reg_base, BLKADDR_CPT0, lf->slot,
OTX2_CPT_LF_DONE_WAIT);
done_wait.s.time_wait = time_wait;
otx2_cpt_write64(lf->lfs->reg_base, BLKADDR_CPT0, lf->slot,
OTX2_CPT_LF_DONE_WAIT, done_wait.u);
}
static void cptlf_do_set_done_num_wait(struct otx2_cptlf_info *lf, int num_wait)
{
union otx2_cptx_lf_done_wait done_wait;
done_wait.u = otx2_cpt_read64(lf->lfs->reg_base, BLKADDR_CPT0, lf->slot,
OTX2_CPT_LF_DONE_WAIT);
done_wait.s.num_wait = num_wait;
otx2_cpt_write64(lf->lfs->reg_base, BLKADDR_CPT0, lf->slot,
OTX2_CPT_LF_DONE_WAIT, done_wait.u);
}
static void cptlf_set_done_time_wait(struct otx2_cptlfs_info *lfs,
int time_wait)
{
int slot;
for (slot = 0; slot < lfs->lfs_num; slot++)
cptlf_do_set_done_time_wait(&lfs->lf[slot], time_wait);
}
static void cptlf_set_done_num_wait(struct otx2_cptlfs_info *lfs, int num_wait)
{
int slot;
for (slot = 0; slot < lfs->lfs_num; slot++)
cptlf_do_set_done_num_wait(&lfs->lf[slot], num_wait);
}
static int cptlf_set_pri(struct otx2_cptlf_info *lf, int pri)
{
struct otx2_cptlfs_info *lfs = lf->lfs;
union otx2_cptx_af_lf_ctrl lf_ctrl;
int ret;
ret = otx2_cpt_read_af_reg(lfs->mbox, lfs->pdev,
CPT_AF_LFX_CTL(lf->slot),
&lf_ctrl.u);
if (ret)
return ret;
lf_ctrl.s.pri = pri ? 1 : 0;
ret = otx2_cpt_write_af_reg(lfs->mbox, lfs->pdev,
CPT_AF_LFX_CTL(lf->slot),
lf_ctrl.u);
return ret;
}
static int cptlf_set_eng_grps_mask(struct otx2_cptlf_info *lf,
int eng_grps_mask)
{
struct otx2_cptlfs_info *lfs = lf->lfs;
union otx2_cptx_af_lf_ctrl lf_ctrl;
int ret;
ret = otx2_cpt_read_af_reg(lfs->mbox, lfs->pdev,
CPT_AF_LFX_CTL(lf->slot),
&lf_ctrl.u);
if (ret)
return ret;
lf_ctrl.s.grp = eng_grps_mask;
ret = otx2_cpt_write_af_reg(lfs->mbox, lfs->pdev,
CPT_AF_LFX_CTL(lf->slot),
lf_ctrl.u);
return ret;
}
static int cptlf_set_grp_and_pri(struct otx2_cptlfs_info *lfs,
int eng_grp_mask, int pri)
{
int slot, ret = 0;
for (slot = 0; slot < lfs->lfs_num; slot++) {
ret = cptlf_set_pri(&lfs->lf[slot], pri);
if (ret)
return ret;
ret = cptlf_set_eng_grps_mask(&lfs->lf[slot], eng_grp_mask);
if (ret)
return ret;
}
return ret;
}
static void cptlf_hw_init(struct otx2_cptlfs_info *lfs)
{
/* Disable instruction queues */
otx2_cptlf_disable_iqueues(lfs);
/* Set instruction queues base addresses */
otx2_cptlf_set_iqueues_base_addr(lfs);
/* Set instruction queues sizes */
otx2_cptlf_set_iqueues_size(lfs);
/* Set done interrupts time wait */
cptlf_set_done_time_wait(lfs, CPT_TIMER_HOLD);
/* Set done interrupts num wait */
cptlf_set_done_num_wait(lfs, CPT_COUNT_HOLD);
/* Enable instruction queues */
otx2_cptlf_enable_iqueues(lfs);
}
static void cptlf_hw_cleanup(struct otx2_cptlfs_info *lfs)
{
/* Disable instruction queues */
otx2_cptlf_disable_iqueues(lfs);
}
static void cptlf_set_misc_intrs(struct otx2_cptlfs_info *lfs, u8 enable)
{
union otx2_cptx_lf_misc_int_ena_w1s irq_misc = { .u = 0x0 };
u64 reg = enable ? OTX2_CPT_LF_MISC_INT_ENA_W1S :
OTX2_CPT_LF_MISC_INT_ENA_W1C;
int slot;
irq_misc.s.fault = 0x1;
irq_misc.s.hwerr = 0x1;
irq_misc.s.irde = 0x1;
irq_misc.s.nqerr = 0x1;
irq_misc.s.nwrp = 0x1;
for (slot = 0; slot < lfs->lfs_num; slot++)
otx2_cpt_write64(lfs->reg_base, BLKADDR_CPT0, slot, reg,
irq_misc.u);
}
static void cptlf_enable_intrs(struct otx2_cptlfs_info *lfs)
{
int slot;
/* Enable done interrupts */
for (slot = 0; slot < lfs->lfs_num; slot++)
otx2_cpt_write64(lfs->reg_base, BLKADDR_CPT0, slot,
OTX2_CPT_LF_DONE_INT_ENA_W1S, 0x1);
/* Enable Misc interrupts */
cptlf_set_misc_intrs(lfs, true);
}
static void cptlf_disable_intrs(struct otx2_cptlfs_info *lfs)
{
int slot;
for (slot = 0; slot < lfs->lfs_num; slot++)
otx2_cpt_write64(lfs->reg_base, BLKADDR_CPT0, slot,
OTX2_CPT_LF_DONE_INT_ENA_W1C, 0x1);
cptlf_set_misc_intrs(lfs, false);
}
static inline int cptlf_read_done_cnt(struct otx2_cptlf_info *lf)
{
union otx2_cptx_lf_done irq_cnt;
irq_cnt.u = otx2_cpt_read64(lf->lfs->reg_base, BLKADDR_CPT0, lf->slot,
OTX2_CPT_LF_DONE);
return irq_cnt.s.done;
}
static irqreturn_t cptlf_misc_intr_handler(int __always_unused irq, void *arg)
{
union otx2_cptx_lf_misc_int irq_misc, irq_misc_ack;
struct otx2_cptlf_info *lf = arg;
struct device *dev;
dev = &lf->lfs->pdev->dev;
irq_misc.u = otx2_cpt_read64(lf->lfs->reg_base, BLKADDR_CPT0, lf->slot,
OTX2_CPT_LF_MISC_INT);
irq_misc_ack.u = 0x0;
if (irq_misc.s.fault) {
dev_err(dev, "Memory error detected while executing CPT_INST_S, LF %d.\n",
lf->slot);
irq_misc_ack.s.fault = 0x1;
} else if (irq_misc.s.hwerr) {
dev_err(dev, "HW error from an engine executing CPT_INST_S, LF %d.",
lf->slot);
irq_misc_ack.s.hwerr = 0x1;
} else if (irq_misc.s.nwrp) {
dev_err(dev, "SMMU fault while writing CPT_RES_S to CPT_INST_S[RES_ADDR], LF %d.\n",
lf->slot);
irq_misc_ack.s.nwrp = 0x1;
} else if (irq_misc.s.irde) {
dev_err(dev, "Memory error when accessing instruction memory queue CPT_LF_Q_BASE[ADDR].\n");
irq_misc_ack.s.irde = 0x1;
} else if (irq_misc.s.nqerr) {
dev_err(dev, "Error enqueuing an instruction received at CPT_LF_NQ.\n");
irq_misc_ack.s.nqerr = 0x1;
} else {
dev_err(dev, "Unhandled interrupt in CPT LF %d\n", lf->slot);
return IRQ_NONE;
}
/* Acknowledge interrupts */
otx2_cpt_write64(lf->lfs->reg_base, BLKADDR_CPT0, lf->slot,
OTX2_CPT_LF_MISC_INT, irq_misc_ack.u);
return IRQ_HANDLED;
}
static irqreturn_t cptlf_done_intr_handler(int irq, void *arg)
{
union otx2_cptx_lf_done_wait done_wait;
struct otx2_cptlf_info *lf = arg;
int irq_cnt;
/* Read the number of completed requests */
irq_cnt = cptlf_read_done_cnt(lf);
if (irq_cnt) {
done_wait.u = otx2_cpt_read64(lf->lfs->reg_base, BLKADDR_CPT0,
lf->slot, OTX2_CPT_LF_DONE_WAIT);
/* Acknowledge the number of completed requests */
otx2_cpt_write64(lf->lfs->reg_base, BLKADDR_CPT0, lf->slot,
OTX2_CPT_LF_DONE_ACK, irq_cnt);
otx2_cpt_write64(lf->lfs->reg_base, BLKADDR_CPT0, lf->slot,
OTX2_CPT_LF_DONE_WAIT, done_wait.u);
if (unlikely(!lf->wqe)) {
dev_err(&lf->lfs->pdev->dev, "No work for LF %d\n",
lf->slot);
return IRQ_NONE;
}
/* Schedule processing of completed requests */
tasklet_hi_schedule(&lf->wqe->work);
}
return IRQ_HANDLED;
}
void otx2_cptlf_unregister_interrupts(struct otx2_cptlfs_info *lfs)
{
int i, offs, vector;
for (i = 0; i < lfs->lfs_num; i++) {
for (offs = 0; offs < OTX2_CPT_LF_MSIX_VECTORS; offs++) {
if (!lfs->lf[i].is_irq_reg[offs])
continue;
vector = pci_irq_vector(lfs->pdev,
lfs->lf[i].msix_offset + offs);
free_irq(vector, &lfs->lf[i]);
lfs->lf[i].is_irq_reg[offs] = false;
}
}
cptlf_disable_intrs(lfs);
}
static int cptlf_do_register_interrrupts(struct otx2_cptlfs_info *lfs,
int lf_num, int irq_offset,
irq_handler_t handler)
{
int ret, vector;
vector = pci_irq_vector(lfs->pdev, lfs->lf[lf_num].msix_offset +
irq_offset);
ret = request_irq(vector, handler, 0,
lfs->lf[lf_num].irq_name[irq_offset],
&lfs->lf[lf_num]);
if (ret)
return ret;
lfs->lf[lf_num].is_irq_reg[irq_offset] = true;
return ret;
}
int otx2_cptlf_register_interrupts(struct otx2_cptlfs_info *lfs)
{
int irq_offs, ret, i;
for (i = 0; i < lfs->lfs_num; i++) {
irq_offs = OTX2_CPT_LF_INT_VEC_E_MISC;
snprintf(lfs->lf[i].irq_name[irq_offs], 32, "CPTLF Misc%d", i);
ret = cptlf_do_register_interrrupts(lfs, i, irq_offs,
cptlf_misc_intr_handler);
if (ret)
goto free_irq;
irq_offs = OTX2_CPT_LF_INT_VEC_E_DONE;
snprintf(lfs->lf[i].irq_name[irq_offs], 32, "OTX2_CPTLF Done%d",
i);
ret = cptlf_do_register_interrrupts(lfs, i, irq_offs,
cptlf_done_intr_handler);
if (ret)
goto free_irq;
}
cptlf_enable_intrs(lfs);
return 0;
free_irq:
otx2_cptlf_unregister_interrupts(lfs);
return ret;
}
void otx2_cptlf_free_irqs_affinity(struct otx2_cptlfs_info *lfs)
{
int slot, offs;
for (slot = 0; slot < lfs->lfs_num; slot++) {
for (offs = 0; offs < OTX2_CPT_LF_MSIX_VECTORS; offs++)
irq_set_affinity_hint(pci_irq_vector(lfs->pdev,
lfs->lf[slot].msix_offset +
offs), NULL);
free_cpumask_var(lfs->lf[slot].affinity_mask);
}
}
int otx2_cptlf_set_irqs_affinity(struct otx2_cptlfs_info *lfs)
{
struct otx2_cptlf_info *lf = lfs->lf;
int slot, offs, ret;
for (slot = 0; slot < lfs->lfs_num; slot++) {
if (!zalloc_cpumask_var(&lf[slot].affinity_mask, GFP_KERNEL)) {
dev_err(&lfs->pdev->dev,
"cpumask allocation failed for LF %d", slot);
ret = -ENOMEM;
goto free_affinity_mask;
}
cpumask_set_cpu(cpumask_local_spread(slot,
dev_to_node(&lfs->pdev->dev)),
lf[slot].affinity_mask);
for (offs = 0; offs < OTX2_CPT_LF_MSIX_VECTORS; offs++) {
ret = irq_set_affinity_hint(pci_irq_vector(lfs->pdev,
lf[slot].msix_offset + offs),
lf[slot].affinity_mask);
if (ret)
goto free_affinity_mask;
}
}
return 0;
free_affinity_mask:
otx2_cptlf_free_irqs_affinity(lfs);
return ret;
}
int otx2_cptlf_init(struct otx2_cptlfs_info *lfs, u8 eng_grp_mask, int pri,
int lfs_num)
{
int slot, ret;
if (!lfs->pdev || !lfs->reg_base)
return -EINVAL;
lfs->lfs_num = lfs_num;
for (slot = 0; slot < lfs->lfs_num; slot++) {
lfs->lf[slot].lfs = lfs;
lfs->lf[slot].slot = slot;
lfs->lf[slot].lmtline = lfs->reg_base +
OTX2_CPT_RVU_FUNC_ADDR_S(BLKADDR_LMT, slot,
OTX2_CPT_LMT_LF_LMTLINEX(0));
lfs->lf[slot].ioreg = lfs->reg_base +
OTX2_CPT_RVU_FUNC_ADDR_S(BLKADDR_CPT0, slot,
OTX2_CPT_LF_NQX(0));
}
/* Send request to attach LFs */
ret = otx2_cpt_attach_rscrs_msg(lfs);
if (ret)
goto clear_lfs_num;
ret = otx2_cpt_alloc_instruction_queues(lfs);
if (ret) {
dev_err(&lfs->pdev->dev,
"Allocating instruction queues failed\n");
goto detach_rsrcs;
}
cptlf_hw_init(lfs);
/*
* Allow each LF to execute requests destined to any of 8 engine
* groups and set queue priority of each LF to high
*/
ret = cptlf_set_grp_and_pri(lfs, eng_grp_mask, pri);
if (ret)
goto free_iq;
return 0;
free_iq:
otx2_cpt_free_instruction_queues(lfs);
cptlf_hw_cleanup(lfs);
detach_rsrcs:
otx2_cpt_detach_rsrcs_msg(lfs);
clear_lfs_num:
lfs->lfs_num = 0;
return ret;
}
void otx2_cptlf_shutdown(struct otx2_cptlfs_info *lfs)
{
lfs->lfs_num = 0;
/* Cleanup LFs hardware side */
cptlf_hw_cleanup(lfs);
/* Send request to detach LFs */
otx2_cpt_detach_rsrcs_msg(lfs);
}