linux/drivers/net/ehea/ehea_qmr.c

583 lines
13 KiB
C

/*
* linux/drivers/net/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.
*/
#include "ehea.h"
#include "ehea_phyp.h"
#include "ehea_qmr.h"
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)) {
ehea_error("not on pageboundary");
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)) {
ehea_error("pagesize conflict! kernel pagesize=%d, "
"ehea pagesize=%d", (int)PAGE_SIZE, (int)pagesize);
return -EINVAL;
}
queue->queue_length = nr_of_pages * pagesize;
queue->queue_pages = kmalloc(nr_of_pages * sizeof(void*), GFP_KERNEL);
if (!queue->queue_pages) {
ehea_error("no mem for 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) {
ehea_error("no mem for 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) {
ehea_error("alloc_resource_cq failed");
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) {
ehea_error("hw_qpageit_get_inc failed");
goto out_kill_hwq;
}
rpage = virt_to_abs(vpage);
hret = ehea_h_register_rpage(adapter->handle,
0, EHEA_CQ_REGISTER_ORIG,
cq->fw_handle, rpage, 1);
if (hret < H_SUCCESS) {
ehea_error("register_rpage_cq failed ehea_cq=%p "
"hret=%lx counter=%i act_pages=%i",
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)) {
ehea_error("registration of pages not "
"complete hret=%lx\n", hret);
goto out_kill_hwq;
}
} else {
if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
ehea_error("CQ: registration of page failed "
"hret=%lx\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);
out_freemem:
kfree(cq);
out_nomem:
return NULL;
}
int ehea_destroy_cq(struct ehea_cq *cq)
{
u64 adapter_handle, hret;
adapter_handle = cq->adapter->handle;
if (!cq)
return 0;
/* deregister all previous registered pages */
hret = ehea_h_free_resource(adapter_handle, cq->fw_handle);
if (hret != H_SUCCESS) {
ehea_error("destroy CQ failed");
return -EIO;
}
hw_queue_dtor(&cq->hw_queue);
kfree(cq);
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) {
ehea_error("no mem for 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) {
ehea_error("alloc_resource_eq failed");
goto out_freemem;
}
ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages,
EHEA_PAGESIZE, sizeof(struct ehea_eqe));
if (ret) {
ehea_error("can't allocate eq pages");
goto out_freeres;
}
for (i = 0; i < eq->attr.nr_pages; i++) {
vpage = hw_qpageit_get_inc(&eq->hw_queue);
if (!vpage) {
ehea_error("hw_qpageit_get_inc failed");
hret = H_RESOURCE;
goto out_kill_hwq;
}
rpage = virt_to_abs(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) || (!vpage)) {
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);
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 = (struct ehea_eqe*)hw_eqit_eq_get_inc_valid(&eq->hw_queue);
spin_unlock_irqrestore(&eq->spinlock, flags);
return eqe;
}
int ehea_destroy_eq(struct ehea_eq *eq)
{
u64 hret;
unsigned long flags;
if (!eq)
return 0;
spin_lock_irqsave(&eq->spinlock, flags);
hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle);
spin_unlock_irqrestore(&eq->spinlock, flags);
if (hret != H_SUCCESS) {
ehea_error("destroy_eq failed");
return -EIO;
}
hw_queue_dtor(&eq->hw_queue);
kfree(eq);
return 0;
}
/**
* allocates memory for a queue and registers pages in phyp
*/
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) {
ehea_error("hw_qpageit_get_inc failed");
goto out_kill_hwq;
}
rpage = virt_to_abs(vpage);
hret = ehea_h_register_rpage(adapter->handle,
0, h_call_q_selector,
qp->fw_handle, rpage, 1);
if (hret < H_SUCCESS) {
ehea_error("register_rpage_qp failed");
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) {
ehea_error("no mem for 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) {
ehea_error("ehea_h_alloc_resource_qp failed");
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) {
ehea_error("can't register for sq ret=%x", 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) {
ehea_error("can't register for rq1 ret=%x", 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) {
ehea_error("can't register for rq2 ret=%x", 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) {
ehea_error("can't register for rq3 ret=%x", 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);
out_freemem:
kfree(qp);
return NULL;
}
int ehea_destroy_qp(struct ehea_qp *qp)
{
u64 hret;
struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
if (!qp)
return 0;
hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle);
if (hret != H_SUCCESS) {
ehea_error("destroy_qp failed");
return -EIO;
}
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 0;
}
int ehea_reg_mr_adapter(struct ehea_adapter *adapter)
{
int i, k, ret;
u64 hret, pt_abs, start, end, nr_pages;
u32 acc_ctrl = EHEA_MR_ACC_CTRL;
u64 *pt;
start = KERNELBASE;
end = (u64)high_memory;
nr_pages = (end - start) / PAGE_SIZE;
pt = kzalloc(PAGE_SIZE, GFP_KERNEL);
if (!pt) {
ehea_error("no mem");
ret = -ENOMEM;
goto out;
}
pt_abs = virt_to_abs(pt);
hret = ehea_h_alloc_resource_mr(adapter->handle, start, end - start,
acc_ctrl, adapter->pd,
&adapter->mr.handle, &adapter->mr.lkey);
if (hret != H_SUCCESS) {
ehea_error("alloc_resource_mr failed");
ret = -EIO;
goto out;
}
adapter->mr.vaddr = KERNELBASE;
k = 0;
while (nr_pages > 0) {
if (nr_pages > 1) {
u64 num_pages = min(nr_pages, (u64)512);
for (i = 0; i < num_pages; i++)
pt[i] = virt_to_abs((void*)(((u64)start)
+ ((k++) *
PAGE_SIZE)));
hret = ehea_h_register_rpage_mr(adapter->handle,
adapter->mr.handle, 0,
0, (u64)pt_abs,
num_pages);
nr_pages -= num_pages;
} else {
u64 abs_adr = virt_to_abs((void*)(((u64)start)
+ (k * PAGE_SIZE)));
hret = ehea_h_register_rpage_mr(adapter->handle,
adapter->mr.handle, 0,
0, abs_adr,1);
nr_pages--;
}
if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED)) {
ehea_h_free_resource(adapter->handle,
adapter->mr.handle);
ehea_error("register_rpage_mr failed: hret = %lX",
hret);
ret = -EIO;
goto out;
}
}
if (hret != H_SUCCESS) {
ehea_h_free_resource(adapter->handle, adapter->mr.handle);
ehea_error("register_rpage failed for last page: hret = %lX",
hret);
ret = -EIO;
goto out;
}
ret = 0;
out:
kfree(pt);
return ret;
}