Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  linux/drivers/net/ethernet/ibm/ehea/ehea_qmr.c
 *
 *  eHEA ethernet device driver for IBM eServer System p
 *
 *  (C) Copyright IBM Corp. 2006
 *
 *  Authors:
 *       Christoph Raisch <raisch@de.ibm.com>
 *       Jan-Bernd Themann <themann@de.ibm.com>
 *       Thomas Klein <tklein@de.ibm.com>
 */
 
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
#include <linux/mm.h>
#include <linux/slab.h>
#include "ehea.h"
#include "ehea_phyp.h"
#include "ehea_qmr.h"
 
static struct ehea_bmap *ehea_bmap;
 
static void *hw_qpageit_get_inc(struct hw_queue *queue)
{
<------>void *retvalue = hw_qeit_get(queue);
 
<------>queue->current_q_offset += queue->pagesize;
<------>if (queue->current_q_offset > queue->queue_length) {
<------><------>queue->current_q_offset -= queue->pagesize;
<------><------>retvalue = NULL;
<------>} else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) {
<------><------>pr_err("not on pageboundary\n");
<------><------>retvalue = NULL;
<------>}
<------>return retvalue;
}
 
static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages,
<------><------><------>  const u32 pagesize, const u32 qe_size)
{
<------>int pages_per_kpage = PAGE_SIZE / pagesize;
<------>int i, k;
 
<------>if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) {
<------><------>pr_err("pagesize conflict! kernel pagesize=%d, ehea pagesize=%d\n",
<------><------>       (int)PAGE_SIZE, (int)pagesize);
<------><------>return -EINVAL;
<------>}
 
<------>queue->queue_length = nr_of_pages * pagesize;
<------>queue->queue_pages = kmalloc_array(nr_of_pages, sizeof(void *),
<------><------><------><------><------>   GFP_KERNEL);
<------>if (!queue->queue_pages)
<------><------>return -ENOMEM;
 
<------>/*
<------> * allocate pages for queue:
<------> * outer loop allocates whole kernel pages (page aligned) and
<------> * inner loop divides a kernel page into smaller hea queue pages
<------> */
<------>i = 0;
<------>while (i < nr_of_pages) {
<------><------>u8 *kpage = (u8 *)get_zeroed_page(GFP_KERNEL);
<------><------>if (!kpage)
<------><------><------>goto out_nomem;
<------><------>for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) {
<------><------><------>(queue->queue_pages)[i] = (struct ehea_page *)kpage;
<------><------><------>kpage += pagesize;
<------><------><------>i++;
<------><------>}
<------>}
 
<------>queue->current_q_offset = 0;
<------>queue->qe_size = qe_size;
<------>queue->pagesize = pagesize;
<------>queue->toggle_state = 1;
 
<------>return 0;
out_nomem:
<------>for (i = 0; i < nr_of_pages; i += pages_per_kpage) {
<------><------>if (!(queue->queue_pages)[i])
<------><------><------>break;
<------><------>free_page((unsigned long)(queue->queue_pages)[i]);
<------>}
<------>return -ENOMEM;
}
 
static void hw_queue_dtor(struct hw_queue *queue)
{
<------>int pages_per_kpage;
<------>int i, nr_pages;
 
<------>if (!queue || !queue->queue_pages)
<------><------>return;
 
<------>pages_per_kpage = PAGE_SIZE / queue->pagesize;
 
<------>nr_pages = queue->queue_length / queue->pagesize;
 
<------>for (i = 0; i < nr_pages; i += pages_per_kpage)
<------><------>free_page((unsigned long)(queue->queue_pages)[i]);
 
<------>kfree(queue->queue_pages);
}
 
struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter,
<------><------><------>       int nr_of_cqe, u64 eq_handle, u32 cq_token)
{
<------>struct ehea_cq *cq;
<------>u64 hret, rpage;
<------>u32 counter;
<------>int ret;
<------>void *vpage;
 
<------>cq = kzalloc(sizeof(*cq), GFP_KERNEL);
<------>if (!cq)
<------><------>goto out_nomem;
 
<------>cq->attr.max_nr_of_cqes = nr_of_cqe;
<------>cq->attr.cq_token = cq_token;
<------>cq->attr.eq_handle = eq_handle;
 
<------>cq->adapter = adapter;
 
<------>hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr,
<------><------><------><------><------>&cq->fw_handle, &cq->epas);
<------>if (hret != H_SUCCESS) {
<------><------>pr_err("alloc_resource_cq failed\n");
<------><------>goto out_freemem;
<------>}
 
<------>ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages,
<------><------><------>    EHEA_PAGESIZE, sizeof(struct ehea_cqe));
<------>if (ret)
<------><------>goto out_freeres;
 
<------>for (counter = 0; counter < cq->attr.nr_pages; counter++) {
<------><------>vpage = hw_qpageit_get_inc(&cq->hw_queue);
<------><------>if (!vpage) {
<------><------><------>pr_err("hw_qpageit_get_inc failed\n");
<------><------><------>goto out_kill_hwq;
<------><------>}
 
<------><------>rpage = __pa(vpage);
<------><------>hret = ehea_h_register_rpage(adapter->handle,
<------><------><------><------><------>     0, EHEA_CQ_REGISTER_ORIG,
<------><------><------><------><------>     cq->fw_handle, rpage, 1);
<------><------>if (hret < H_SUCCESS) {
<------><------><------>pr_err("register_rpage_cq failed ehea_cq=%p hret=%llx counter=%i act_pages=%i\n",
<------><------><------>       cq, hret, counter, cq->attr.nr_pages);
<------><------><------>goto out_kill_hwq;
<------><------>}
 
<------><------>if (counter == (cq->attr.nr_pages - 1)) {
<------><------><------>vpage = hw_qpageit_get_inc(&cq->hw_queue);
 
<------><------><------>if ((hret != H_SUCCESS) || (vpage)) {
<------><------><------><------>pr_err("registration of pages not complete hret=%llx\n",
<------><------><------><------>       hret);
<------><------><------><------>goto out_kill_hwq;
<------><------><------>}
<------><------>} else {
<------><------><------>if (hret != H_PAGE_REGISTERED) {
<------><------><------><------>pr_err("CQ: registration of page failed hret=%llx\n",
<------><------><------><------>       hret);
<------><------><------><------>goto out_kill_hwq;
<------><------><------>}
<------><------>}
<------>}
 
<------>hw_qeit_reset(&cq->hw_queue);
<------>ehea_reset_cq_ep(cq);
<------>ehea_reset_cq_n1(cq);
 
<------>return cq;
 
out_kill_hwq:
<------>hw_queue_dtor(&cq->hw_queue);
 
out_freeres:
<------>ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE);
 
out_freemem:
<------>kfree(cq);
 
out_nomem:
<------>return NULL;
}
 
static u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force)
{
<------>u64 hret;
<------>u64 adapter_handle = cq->adapter->handle;
 
<------>/* deregister all previous registered pages */
<------>hret = ehea_h_free_resource(adapter_handle, cq->fw_handle, force);
<------>if (hret != H_SUCCESS)
<------><------>return hret;
 
<------>hw_queue_dtor(&cq->hw_queue);
<------>kfree(cq);
 
<------>return hret;
}
 
int ehea_destroy_cq(struct ehea_cq *cq)
{
<------>u64 hret, aer, aerr;
<------>if (!cq)
<------><------>return 0;
 
<------>hcp_epas_dtor(&cq->epas);
<------>hret = ehea_destroy_cq_res(cq, NORMAL_FREE);
<------>if (hret == H_R_STATE) {
<------><------>ehea_error_data(cq->adapter, cq->fw_handle, &aer, &aerr);
<------><------>hret = ehea_destroy_cq_res(cq, FORCE_FREE);
<------>}
 
<------>if (hret != H_SUCCESS) {
<------><------>pr_err("destroy CQ failed\n");
<------><------>return -EIO;
<------>}
 
<------>return 0;
}
 
struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
<------><------><------>       const enum ehea_eq_type type,
<------><------><------>       const u32 max_nr_of_eqes, const u8 eqe_gen)
{
<------>int ret, i;
<------>u64 hret, rpage;
<------>void *vpage;
<------>struct ehea_eq *eq;
 
<------>eq = kzalloc(sizeof(*eq), GFP_KERNEL);
<------>if (!eq)
<------><------>return NULL;
 
<------>eq->adapter = adapter;
<------>eq->attr.type = type;
<------>eq->attr.max_nr_of_eqes = max_nr_of_eqes;
<------>eq->attr.eqe_gen = eqe_gen;
<------>spin_lock_init(&eq->spinlock);
 
<------>hret = ehea_h_alloc_resource_eq(adapter->handle,
<------><------><------><------><------>&eq->attr, &eq->fw_handle);
<------>if (hret != H_SUCCESS) {
<------><------>pr_err("alloc_resource_eq failed\n");
<------><------>goto out_freemem;
<------>}
 
<------>ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages,
<------><------><------>    EHEA_PAGESIZE, sizeof(struct ehea_eqe));
<------>if (ret) {
<------><------>pr_err("can't allocate eq pages\n");
<------><------>goto out_freeres;
<------>}
 
<------>for (i = 0; i < eq->attr.nr_pages; i++) {
<------><------>vpage = hw_qpageit_get_inc(&eq->hw_queue);
<------><------>if (!vpage) {
<------><------><------>pr_err("hw_qpageit_get_inc failed\n");
<------><------><------>hret = H_RESOURCE;
<------><------><------>goto out_kill_hwq;
<------><------>}
 
<------><------>rpage = __pa(vpage);
 
<------><------>hret = ehea_h_register_rpage(adapter->handle, 0,
<------><------><------><------><------>     EHEA_EQ_REGISTER_ORIG,
<------><------><------><------><------>     eq->fw_handle, rpage, 1);
 
<------><------>if (i == (eq->attr.nr_pages - 1)) {
<------><------><------>/* last page */
<------><------><------>vpage = hw_qpageit_get_inc(&eq->hw_queue);
<------><------><------>if ((hret != H_SUCCESS) || (vpage))
<------><------><------><------>goto out_kill_hwq;
 
<------><------>} else {
<------><------><------>if (hret != H_PAGE_REGISTERED)
<------><------><------><------>goto out_kill_hwq;
 
<------><------>}
<------>}
 
<------>hw_qeit_reset(&eq->hw_queue);
<------>return eq;
 
out_kill_hwq:
<------>hw_queue_dtor(&eq->hw_queue);
 
out_freeres:
<------>ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE);
 
out_freemem:
<------>kfree(eq);
<------>return NULL;
}
 
struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq)
{
<------>struct ehea_eqe *eqe;
<------>unsigned long flags;
 
<------>spin_lock_irqsave(&eq->spinlock, flags);
<------>eqe = hw_eqit_eq_get_inc_valid(&eq->hw_queue);
<------>spin_unlock_irqrestore(&eq->spinlock, flags);
 
<------>return eqe;
}
 
static u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force)
{
<------>u64 hret;
<------>unsigned long flags;
 
<------>spin_lock_irqsave(&eq->spinlock, flags);
 
<------>hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force);
<------>spin_unlock_irqrestore(&eq->spinlock, flags);
 
<------>if (hret != H_SUCCESS)
<------><------>return hret;
 
<------>hw_queue_dtor(&eq->hw_queue);
<------>kfree(eq);
 
<------>return hret;
}
 
int ehea_destroy_eq(struct ehea_eq *eq)
{
<------>u64 hret, aer, aerr;
<------>if (!eq)
<------><------>return 0;
 
<------>hcp_epas_dtor(&eq->epas);
 
<------>hret = ehea_destroy_eq_res(eq, NORMAL_FREE);
<------>if (hret == H_R_STATE) {
<------><------>ehea_error_data(eq->adapter, eq->fw_handle, &aer, &aerr);
<------><------>hret = ehea_destroy_eq_res(eq, FORCE_FREE);
<------>}
 
<------>if (hret != H_SUCCESS) {
<------><------>pr_err("destroy EQ failed\n");
<------><------>return -EIO;
<------>}
 
<------>return 0;
}
 
/* allocates memory for a queue and registers pages in phyp */
static int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue,
<------><------><------>   int nr_pages, int wqe_size, int act_nr_sges,
<------><------><------>   struct ehea_adapter *adapter, int h_call_q_selector)
{
<------>u64 hret, rpage;
<------>int ret, cnt;
<------>void *vpage;
 
<------>ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size);
<------>if (ret)
<------><------>return ret;
 
<------>for (cnt = 0; cnt < nr_pages; cnt++) {
<------><------>vpage = hw_qpageit_get_inc(hw_queue);
<------><------>if (!vpage) {
<------><------><------>pr_err("hw_qpageit_get_inc failed\n");
<------><------><------>goto out_kill_hwq;
<------><------>}
<------><------>rpage = __pa(vpage);
<------><------>hret = ehea_h_register_rpage(adapter->handle,
<------><------><------><------><------>     0, h_call_q_selector,
<------><------><------><------><------>     qp->fw_handle, rpage, 1);
<------><------>if (hret < H_SUCCESS) {
<------><------><------>pr_err("register_rpage_qp failed\n");
<------><------><------>goto out_kill_hwq;
<------><------>}
<------>}
<------>hw_qeit_reset(hw_queue);
<------>return 0;
 
out_kill_hwq:
<------>hw_queue_dtor(hw_queue);
<------>return -EIO;
}
 
static inline u32 map_wqe_size(u8 wqe_enc_size)
{
<------>return 128 << wqe_enc_size;
}
 
struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter,
<------><------><------>       u32 pd, struct ehea_qp_init_attr *init_attr)
{
<------>int ret;
<------>u64 hret;
<------>struct ehea_qp *qp;
<------>u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1;
<------>u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3;
 
 
<------>qp = kzalloc(sizeof(*qp), GFP_KERNEL);
<------>if (!qp)
<------><------>return NULL;
 
<------>qp->adapter = adapter;
 
<------>hret = ehea_h_alloc_resource_qp(adapter->handle, init_attr, pd,
<------><------><------><------><------>&qp->fw_handle, &qp->epas);
<------>if (hret != H_SUCCESS) {
<------><------>pr_err("ehea_h_alloc_resource_qp failed\n");
<------><------>goto out_freemem;
<------>}
 
<------>wqe_size_in_bytes_sq = map_wqe_size(init_attr->act_wqe_size_enc_sq);
<------>wqe_size_in_bytes_rq1 = map_wqe_size(init_attr->act_wqe_size_enc_rq1);
<------>wqe_size_in_bytes_rq2 = map_wqe_size(init_attr->act_wqe_size_enc_rq2);
<------>wqe_size_in_bytes_rq3 = map_wqe_size(init_attr->act_wqe_size_enc_rq3);
 
<------>ret = ehea_qp_alloc_register(qp, &qp->hw_squeue, init_attr->nr_sq_pages,
<------><------><------><------>     wqe_size_in_bytes_sq,
<------><------><------><------>     init_attr->act_wqe_size_enc_sq, adapter,
<------><------><------><------>     0);
<------>if (ret) {
<------><------>pr_err("can't register for sq ret=%x\n", ret);
<------><------>goto out_freeres;
<------>}
 
<------>ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue1,
<------><------><------><------>     init_attr->nr_rq1_pages,
<------><------><------><------>     wqe_size_in_bytes_rq1,
<------><------><------><------>     init_attr->act_wqe_size_enc_rq1,
<------><------><------><------>     adapter, 1);
<------>if (ret) {
<------><------>pr_err("can't register for rq1 ret=%x\n", ret);
<------><------>goto out_kill_hwsq;
<------>}
 
<------>if (init_attr->rq_count > 1) {
<------><------>ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue2,
<------><------><------><------><------>     init_attr->nr_rq2_pages,
<------><------><------><------><------>     wqe_size_in_bytes_rq2,
<------><------><------><------><------>     init_attr->act_wqe_size_enc_rq2,
<------><------><------><------><------>     adapter, 2);
<------><------>if (ret) {
<------><------><------>pr_err("can't register for rq2 ret=%x\n", ret);
<------><------><------>goto out_kill_hwr1q;
<------><------>}
<------>}
 
<------>if (init_attr->rq_count > 2) {
<------><------>ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue3,
<------><------><------><------><------>     init_attr->nr_rq3_pages,
<------><------><------><------><------>     wqe_size_in_bytes_rq3,
<------><------><------><------><------>     init_attr->act_wqe_size_enc_rq3,
<------><------><------><------><------>     adapter, 3);
<------><------>if (ret) {
<------><------><------>pr_err("can't register for rq3 ret=%x\n", ret);
<------><------><------>goto out_kill_hwr2q;
<------><------>}
<------>}
 
<------>qp->init_attr = *init_attr;
 
<------>return qp;
 
out_kill_hwr2q:
<------>hw_queue_dtor(&qp->hw_rqueue2);
 
out_kill_hwr1q:
<------>hw_queue_dtor(&qp->hw_rqueue1);
 
out_kill_hwsq:
<------>hw_queue_dtor(&qp->hw_squeue);
 
out_freeres:
<------>ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle);
<------>ehea_h_free_resource(adapter->handle, qp->fw_handle, FORCE_FREE);
 
out_freemem:
<------>kfree(qp);
<------>return NULL;
}
 
static u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force)
{
<------>u64 hret;
<------>struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
 
 
<------>ehea_h_disable_and_get_hea(qp->adapter->handle, qp->fw_handle);
<------>hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle, force);
<------>if (hret != H_SUCCESS)
<------><------>return hret;
 
<------>hw_queue_dtor(&qp->hw_squeue);
<------>hw_queue_dtor(&qp->hw_rqueue1);
 
<------>if (qp_attr->rq_count > 1)
<------><------>hw_queue_dtor(&qp->hw_rqueue2);
<------>if (qp_attr->rq_count > 2)
<------><------>hw_queue_dtor(&qp->hw_rqueue3);
<------>kfree(qp);
 
<------>return hret;
}
 
int ehea_destroy_qp(struct ehea_qp *qp)
{
<------>u64 hret, aer, aerr;
<------>if (!qp)
<------><------>return 0;
 
<------>hcp_epas_dtor(&qp->epas);
 
<------>hret = ehea_destroy_qp_res(qp, NORMAL_FREE);
<------>if (hret == H_R_STATE) {
<------><------>ehea_error_data(qp->adapter, qp->fw_handle, &aer, &aerr);
<------><------>hret = ehea_destroy_qp_res(qp, FORCE_FREE);
<------>}
 
<------>if (hret != H_SUCCESS) {
<------><------>pr_err("destroy QP failed\n");
<------><------>return -EIO;
<------>}
 
<------>return 0;
}
 
static inline int ehea_calc_index(unsigned long i, unsigned long s)
{
<------>return (i >> s) & EHEA_INDEX_MASK;
}
 
static inline int ehea_init_top_bmap(struct ehea_top_bmap *ehea_top_bmap,
<------><------><------><------>     int dir)
{
<------>if (!ehea_top_bmap->dir[dir]) {
<------><------>ehea_top_bmap->dir[dir] =
<------><------><------>kzalloc(sizeof(struct ehea_dir_bmap), GFP_KERNEL);
<------><------>if (!ehea_top_bmap->dir[dir])
<------><------><------>return -ENOMEM;
<------>}
<------>return 0;
}
 
static inline int ehea_init_bmap(struct ehea_bmap *ehea_bmap, int top, int dir)
{
<------>if (!ehea_bmap->top[top]) {
<------><------>ehea_bmap->top[top] =
<------><------><------>kzalloc(sizeof(struct ehea_top_bmap), GFP_KERNEL);
<------><------>if (!ehea_bmap->top[top])
<------><------><------>return -ENOMEM;
<------>}
<------>return ehea_init_top_bmap(ehea_bmap->top[top], dir);
}
 
static DEFINE_MUTEX(ehea_busmap_mutex);
static unsigned long ehea_mr_len;
 
#define EHEA_BUSMAP_ADD_SECT 1
#define EHEA_BUSMAP_REM_SECT 0
 
static void ehea_rebuild_busmap(void)
{
<------>u64 vaddr = EHEA_BUSMAP_START;
<------>int top, dir, idx;
 
<------>for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
<------><------>struct ehea_top_bmap *ehea_top;
<------><------>int valid_dir_entries = 0;
 
<------><------>if (!ehea_bmap->top[top])
<------><------><------>continue;
<------><------>ehea_top = ehea_bmap->top[top];
<------><------>for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
<------><------><------>struct ehea_dir_bmap *ehea_dir;
<------><------><------>int valid_entries = 0;
 
<------><------><------>if (!ehea_top->dir[dir])
<------><------><------><------>continue;
<------><------><------>valid_dir_entries++;
<------><------><------>ehea_dir = ehea_top->dir[dir];
<------><------><------>for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) {
<------><------><------><------>if (!ehea_dir->ent[idx])
<------><------><------><------><------>continue;
<------><------><------><------>valid_entries++;
<------><------><------><------>ehea_dir->ent[idx] = vaddr;
<------><------><------><------>vaddr += EHEA_SECTSIZE;
<------><------><------>}
<------><------><------>if (!valid_entries) {
<------><------><------><------>ehea_top->dir[dir] = NULL;
<------><------><------><------>kfree(ehea_dir);
<------><------><------>}
<------><------>}
<------><------>if (!valid_dir_entries) {
<------><------><------>ehea_bmap->top[top] = NULL;
<------><------><------>kfree(ehea_top);
<------><------>}
<------>}
}
 
static int ehea_update_busmap(unsigned long pfn, unsigned long nr_pages, int add)
{
<------>unsigned long i, start_section, end_section;
 
<------>if (!nr_pages)
<------><------>return 0;
 
<------>if (!ehea_bmap) {
<------><------>ehea_bmap = kzalloc(sizeof(struct ehea_bmap), GFP_KERNEL);
<------><------>if (!ehea_bmap)
<------><------><------>return -ENOMEM;
<------>}
 
<------>start_section = (pfn * PAGE_SIZE) / EHEA_SECTSIZE;
<------>end_section = start_section + ((nr_pages * PAGE_SIZE) / EHEA_SECTSIZE);
<------>/* Mark entries as valid or invalid only; address is assigned later */
<------>for (i = start_section; i < end_section; i++) {
<------><------>u64 flag;
<------><------>int top = ehea_calc_index(i, EHEA_TOP_INDEX_SHIFT);
<------><------>int dir = ehea_calc_index(i, EHEA_DIR_INDEX_SHIFT);
<------><------>int idx = i & EHEA_INDEX_MASK;
 
<------><------>if (add) {
<------><------><------>int ret = ehea_init_bmap(ehea_bmap, top, dir);
<------><------><------>if (ret)
<------><------><------><------>return ret;
<------><------><------>flag = 1; /* valid */
<------><------><------>ehea_mr_len += EHEA_SECTSIZE;
<------><------>} else {
<------><------><------>if (!ehea_bmap->top[top])
<------><------><------><------>continue;
<------><------><------>if (!ehea_bmap->top[top]->dir[dir])
<------><------><------><------>continue;
<------><------><------>flag = 0; /* invalid */
<------><------><------>ehea_mr_len -= EHEA_SECTSIZE;
<------><------>}
 
<------><------>ehea_bmap->top[top]->dir[dir]->ent[idx] = flag;
<------>}
<------>ehea_rebuild_busmap(); /* Assign contiguous addresses for mr */
<------>return 0;
}
 
int ehea_add_sect_bmap(unsigned long pfn, unsigned long nr_pages)
{
<------>int ret;
 
<------>mutex_lock(&ehea_busmap_mutex);
<------>ret = ehea_update_busmap(pfn, nr_pages, EHEA_BUSMAP_ADD_SECT);
<------>mutex_unlock(&ehea_busmap_mutex);
<------>return ret;
}
 
int ehea_rem_sect_bmap(unsigned long pfn, unsigned long nr_pages)
{
<------>int ret;
 
<------>mutex_lock(&ehea_busmap_mutex);
<------>ret = ehea_update_busmap(pfn, nr_pages, EHEA_BUSMAP_REM_SECT);
<------>mutex_unlock(&ehea_busmap_mutex);
<------>return ret;
}
 
static int ehea_is_hugepage(unsigned long pfn)
{
<------>if (pfn & EHEA_HUGEPAGE_PFN_MASK)
<------><------>return 0;
 
<------>if (page_shift(pfn_to_page(pfn)) != EHEA_HUGEPAGESHIFT)
<------><------>return 0;
 
<------>return 1;
}
 
static int ehea_create_busmap_callback(unsigned long initial_pfn,
<------><------><------><------>       unsigned long total_nr_pages, void *arg)
{
<------>int ret;
<------>unsigned long pfn, start_pfn, end_pfn, nr_pages;
 
<------>if ((total_nr_pages * PAGE_SIZE) < EHEA_HUGEPAGE_SIZE)
<------><------>return ehea_update_busmap(initial_pfn, total_nr_pages,
<------><------><------><------><------>  EHEA_BUSMAP_ADD_SECT);
 
<------>/* Given chunk is >= 16GB -> check for hugepages */
<------>start_pfn = initial_pfn;
<------>end_pfn = initial_pfn + total_nr_pages;
<------>pfn = start_pfn;
 
<------>while (pfn < end_pfn) {
<------><------>if (ehea_is_hugepage(pfn)) {
<------><------><------>/* Add mem found in front of the hugepage */
<------><------><------>nr_pages = pfn - start_pfn;
<------><------><------>ret = ehea_update_busmap(start_pfn, nr_pages,
<------><------><------><------><------><------> EHEA_BUSMAP_ADD_SECT);
<------><------><------>if (ret)
<------><------><------><------>return ret;
 
<------><------><------>/* Skip the hugepage */
<------><------><------>pfn += (EHEA_HUGEPAGE_SIZE / PAGE_SIZE);
<------><------><------>start_pfn = pfn;
<------><------>} else
<------><------><------>pfn += (EHEA_SECTSIZE / PAGE_SIZE);
<------>}
 
<------>/* Add mem found behind the hugepage(s)  */
<------>nr_pages = pfn - start_pfn;
<------>return ehea_update_busmap(start_pfn, nr_pages, EHEA_BUSMAP_ADD_SECT);
}
 
int ehea_create_busmap(void)
{
<------>int ret;
 
<------>mutex_lock(&ehea_busmap_mutex);
<------>ehea_mr_len = 0;
<------>ret = walk_system_ram_range(0, 1ULL << MAX_PHYSMEM_BITS, NULL,
<------><------><------><------>   ehea_create_busmap_callback);
<------>mutex_unlock(&ehea_busmap_mutex);
<------>return ret;
}
 
void ehea_destroy_busmap(void)
{
<------>int top, dir;
<------>mutex_lock(&ehea_busmap_mutex);
<------>if (!ehea_bmap)
<------><------>goto out_destroy;
 
<------>for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
<------><------>if (!ehea_bmap->top[top])
<------><------><------>continue;
 
<------><------>for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
<------><------><------>if (!ehea_bmap->top[top]->dir[dir])
<------><------><------><------>continue;
 
<------><------><------>kfree(ehea_bmap->top[top]->dir[dir]);
<------><------>}
 
<------><------>kfree(ehea_bmap->top[top]);
<------>}
 
<------>kfree(ehea_bmap);
<------>ehea_bmap = NULL;
out_destroy:
<------>mutex_unlock(&ehea_busmap_mutex);
}
 
u64 ehea_map_vaddr(void *caddr)
{
<------>int top, dir, idx;
<------>unsigned long index, offset;
 
<------>if (!ehea_bmap)
<------><------>return EHEA_INVAL_ADDR;
 
<------>index = __pa(caddr) >> SECTION_SIZE_BITS;
<------>top = (index >> EHEA_TOP_INDEX_SHIFT) & EHEA_INDEX_MASK;
<------>if (!ehea_bmap->top[top])
<------><------>return EHEA_INVAL_ADDR;
 
<------>dir = (index >> EHEA_DIR_INDEX_SHIFT) & EHEA_INDEX_MASK;
<------>if (!ehea_bmap->top[top]->dir[dir])
<------><------>return EHEA_INVAL_ADDR;
 
<------>idx = index & EHEA_INDEX_MASK;
<------>if (!ehea_bmap->top[top]->dir[dir]->ent[idx])
<------><------>return EHEA_INVAL_ADDR;
 
<------>offset = (unsigned long)caddr & (EHEA_SECTSIZE - 1);
<------>return ehea_bmap->top[top]->dir[dir]->ent[idx] | offset;
}
 
static inline void *ehea_calc_sectbase(int top, int dir, int idx)
{
<------>unsigned long ret = idx;
<------>ret |= dir << EHEA_DIR_INDEX_SHIFT;
<------>ret |= top << EHEA_TOP_INDEX_SHIFT;
<------>return __va(ret << SECTION_SIZE_BITS);
}
 
static u64 ehea_reg_mr_section(int top, int dir, int idx, u64 *pt,
<------><------><------>       struct ehea_adapter *adapter,
<------><------><------>       struct ehea_mr *mr)
{
<------>void *pg;
<------>u64 j, m, hret;
<------>unsigned long k = 0;
<------>u64 pt_abs = __pa(pt);
 
<------>void *sectbase = ehea_calc_sectbase(top, dir, idx);
 
<------>for (j = 0; j < (EHEA_PAGES_PER_SECTION / EHEA_MAX_RPAGE); j++) {
 
<------><------>for (m = 0; m < EHEA_MAX_RPAGE; m++) {
<------><------><------>pg = sectbase + ((k++) * EHEA_PAGESIZE);
<------><------><------>pt[m] = __pa(pg);
<------><------>}
<------><------>hret = ehea_h_register_rpage_mr(adapter->handle, mr->handle, 0,
<------><------><------><------><------><------>0, pt_abs, EHEA_MAX_RPAGE);
 
<------><------>if ((hret != H_SUCCESS) &&
<------><------>    (hret != H_PAGE_REGISTERED)) {
<------><------><------>ehea_h_free_resource(adapter->handle, mr->handle,
<------><------><------><------><------>     FORCE_FREE);
<------><------><------>pr_err("register_rpage_mr failed\n");
<------><------><------>return hret;
<------><------>}
<------>}
<------>return hret;
}
 
static u64 ehea_reg_mr_sections(int top, int dir, u64 *pt,
<------><------><------><------>struct ehea_adapter *adapter,
<------><------><------><------>struct ehea_mr *mr)
{
<------>u64 hret = H_SUCCESS;
<------>int idx;
 
<------>for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) {
<------><------>if (!ehea_bmap->top[top]->dir[dir]->ent[idx])
<------><------><------>continue;
 
<------><------>hret = ehea_reg_mr_section(top, dir, idx, pt, adapter, mr);
<------><------>if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
<------><------><------>return hret;
<------>}
<------>return hret;
}
 
static u64 ehea_reg_mr_dir_sections(int top, u64 *pt,
<------><------><------><------>    struct ehea_adapter *adapter,
<------><------><------><------>    struct ehea_mr *mr)
{
<------>u64 hret = H_SUCCESS;
<------>int dir;
 
<------>for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
<------><------>if (!ehea_bmap->top[top]->dir[dir])
<------><------><------>continue;
 
<------><------>hret = ehea_reg_mr_sections(top, dir, pt, adapter, mr);
<------><------>if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
<------><------><------>return hret;
<------>}
<------>return hret;
}
 
int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
{
<------>int ret;
<------>u64 *pt;
<------>u64 hret;
<------>u32 acc_ctrl = EHEA_MR_ACC_CTRL;
 
<------>unsigned long top;
 
<------>pt = (void *)get_zeroed_page(GFP_KERNEL);
<------>if (!pt) {
<------><------>pr_err("no mem\n");
<------><------>ret = -ENOMEM;
<------><------>goto out;
<------>}
 
<------>hret = ehea_h_alloc_resource_mr(adapter->handle, EHEA_BUSMAP_START,
<------><------><------><------><------>ehea_mr_len, acc_ctrl, adapter->pd,
<------><------><------><------><------>&mr->handle, &mr->lkey);
 
<------>if (hret != H_SUCCESS) {
<------><------>pr_err("alloc_resource_mr failed\n");
<------><------>ret = -EIO;
<------><------>goto out;
<------>}
 
<------>if (!ehea_bmap) {
<------><------>ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
<------><------>pr_err("no busmap available\n");
<------><------>ret = -EIO;
<------><------>goto out;
<------>}
 
<------>for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
<------><------>if (!ehea_bmap->top[top])
<------><------><------>continue;
 
<------><------>hret = ehea_reg_mr_dir_sections(top, pt, adapter, mr);
<------><------>if((hret != H_PAGE_REGISTERED) && (hret != H_SUCCESS))
<------><------><------>break;
<------>}
 
<------>if (hret != H_SUCCESS) {
<------><------>ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
<------><------>pr_err("registering mr failed\n");
<------><------>ret = -EIO;
<------><------>goto out;
<------>}
 
<------>mr->vaddr = EHEA_BUSMAP_START;
<------>mr->adapter = adapter;
<------>ret = 0;
out:
<------>free_page((unsigned long)pt);
<------>return ret;
}
 
int ehea_rem_mr(struct ehea_mr *mr)
{
<------>u64 hret;
 
<------>if (!mr || !mr->adapter)
<------><------>return -EINVAL;
 
<------>hret = ehea_h_free_resource(mr->adapter->handle, mr->handle,
<------><------><------><------>    FORCE_FREE);
<------>if (hret != H_SUCCESS) {
<------><------>pr_err("destroy MR failed\n");
<------><------>return -EIO;
<------>}
 
<------>return 0;
}
 
int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,
<------><------> struct ehea_mr *shared_mr)
{
<------>u64 hret;
 
<------>hret = ehea_h_register_smr(adapter->handle, old_mr->handle,
<------><------><------><------>   old_mr->vaddr, EHEA_MR_ACC_CTRL,
<------><------><------><------>   adapter->pd, shared_mr);
<------>if (hret != H_SUCCESS)
<------><------>return -EIO;
 
<------>shared_mr->adapter = adapter;
 
<------>return 0;
}
 
static void print_error_data(u64 *data)
{
<------>int length;
<------>u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]);
<------>u64 resource = data[1];
 
<------>length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]);
 
<------>if (length > EHEA_PAGESIZE)
<------><------>length = EHEA_PAGESIZE;
 
<------>if (type == EHEA_AER_RESTYPE_QP)
<------><------>pr_err("QP (resource=%llX) state: AER=0x%llX, AERR=0x%llX, port=%llX\n",
<------><------>       resource, data[6], data[12], data[22]);
<------>else if (type == EHEA_AER_RESTYPE_CQ)
<------><------>pr_err("CQ (resource=%llX) state: AER=0x%llX\n",
<------><------>       resource, data[6]);
<------>else if (type == EHEA_AER_RESTYPE_EQ)
<------><------>pr_err("EQ (resource=%llX) state: AER=0x%llX\n",
<------><------>       resource, data[6]);
 
<------>ehea_dump(data, length, "error data");
}
 
u64 ehea_error_data(struct ehea_adapter *adapter, u64 res_handle,
<------><------>    u64 *aer, u64 *aerr)
{
<------>unsigned long ret;
<------>u64 *rblock;
<------>u64 type = 0;
 
<------>rblock = (void *)get_zeroed_page(GFP_KERNEL);
<------>if (!rblock) {
<------><------>pr_err("Cannot allocate rblock memory\n");
<------><------>goto out;
<------>}
 
<------>ret = ehea_h_error_data(adapter->handle, res_handle, rblock);
 
<------>if (ret == H_SUCCESS) {
<------><------>type = EHEA_BMASK_GET(ERROR_DATA_TYPE, rblock[2]);
<------><------>*aer = rblock[6];
<------><------>*aerr = rblock[12];
<------><------>print_error_data(rblock);
<------>} else if (ret == H_R_STATE) {
<------><------>pr_err("No error data available: %llX\n", res_handle);
<------>} else
<------><------>pr_err("Error data could not be fetched: %llX\n", res_handle);
 
<------>free_page((unsigned long)rblock);
out:
<------>return type;
}