- 根目录:
- drivers
- net
- ethernet
- ibm
- ehea
- ehea_qmr.c
/*
* 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>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#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 = PAGE_SIZE / queue->pagesize;
int i, nr_pages;
if (!queue || !queue->queue_pages)
return;
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;
struct h_epa epa;
u64 *cq_handle_ref, hret, rpage;
u32 act_nr_of_entries, act_pages, 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;
cq_handle_ref = &cq->fw_handle;
act_nr_of_entries = 0;
act_pages = 0;
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);
epa = cq->epas.kernel;
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)
{
int page_order;
if (pfn & EHEA_HUGEPAGE_PFN_MASK)
return 0;
page_order = compound_order(pfn_to_page(pfn));
if (page_order + PAGE_SHIFT != 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;
}