blob: c82e245960746ed2f126a4f4b78d77ec30eba3bc [file] [log] [blame]
/*
* 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 <linux/mm.h>
#include "ehea.h"
#include "ehea_phyp.h"
#include "ehea_qmr.h"
struct ehea_busmap ehea_bmap = { 0, 0, NULL };
extern u64 ehea_driver_flags;
extern struct workqueue_struct *ehea_driver_wq;
extern struct work_struct ehea_rereg_mr_task;
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, FORCE_FREE);
out_freemem:
kfree(cq);
out_nomem:
return NULL;
}
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;
if (!cq)
return 0;
hcp_epas_dtor(&cq->epas);
if ((hret = ehea_destroy_cq_res(cq, NORMAL_FREE)) == H_R_STATE) {
ehea_error_data(cq->adapter, cq->fw_handle);
hret = ehea_destroy_cq_res(cq, FORCE_FREE);
}
if (hret != H_SUCCESS) {
ehea_error("destroy CQ failed");
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) {
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, 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 = (struct ehea_eqe*)hw_eqit_eq_get_inc_valid(&eq->hw_queue);
spin_unlock_irqrestore(&eq->spinlock, flags);
return eqe;
}
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;
if (!eq)
return 0;
hcp_epas_dtor(&eq->epas);
if ((hret = ehea_destroy_eq_res(eq, NORMAL_FREE)) == H_R_STATE) {
ehea_error_data(eq->adapter, eq->fw_handle);
hret = ehea_destroy_eq_res(eq, FORCE_FREE);
}
if (hret != H_SUCCESS) {
ehea_error("destroy EQ failed");
return -EIO;
}
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, FORCE_FREE);
out_freemem:
kfree(qp);
return NULL;
}
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;
if (!qp)
return 0;
hcp_epas_dtor(&qp->epas);
if ((hret = ehea_destroy_qp_res(qp, NORMAL_FREE)) == H_R_STATE) {
ehea_error_data(qp->adapter, qp->fw_handle);
hret = ehea_destroy_qp_res(qp, FORCE_FREE);
}
if (hret != H_SUCCESS) {
ehea_error("destroy QP failed");
return -EIO;
}
return 0;
}
int ehea_create_busmap( void )
{
u64 vaddr = EHEA_BUSMAP_START;
unsigned long abs_max_pfn = 0;
unsigned long sec_max_pfn;
int i;
/*
* Sections are not in ascending order -> Loop over all sections and
* find the highest PFN to compute the required map size.
*/
ehea_bmap.valid_sections = 0;
for (i = 0; i < NR_MEM_SECTIONS; i++)
if (valid_section_nr(i)) {
sec_max_pfn = section_nr_to_pfn(i);
if (sec_max_pfn > abs_max_pfn)
abs_max_pfn = sec_max_pfn;
ehea_bmap.valid_sections++;
}
ehea_bmap.entries = abs_max_pfn / EHEA_PAGES_PER_SECTION + 1;
ehea_bmap.vaddr = vmalloc(ehea_bmap.entries * sizeof(*ehea_bmap.vaddr));
if (!ehea_bmap.vaddr)
return -ENOMEM;
for (i = 0 ; i < ehea_bmap.entries; i++) {
unsigned long pfn = section_nr_to_pfn(i);
if (pfn_valid(pfn)) {
ehea_bmap.vaddr[i] = vaddr;
vaddr += EHEA_SECTSIZE;
} else
ehea_bmap.vaddr[i] = 0;
}
return 0;
}
void ehea_destroy_busmap( void )
{
vfree(ehea_bmap.vaddr);
}
u64 ehea_map_vaddr(void *caddr)
{
u64 mapped_addr;
unsigned long index = __pa(caddr) >> SECTION_SIZE_BITS;
if (likely(index < ehea_bmap.entries)) {
mapped_addr = ehea_bmap.vaddr[index];
if (likely(mapped_addr))
mapped_addr |= (((unsigned long)caddr)
& (EHEA_SECTSIZE - 1));
else
mapped_addr = -1;
} else
mapped_addr = -1;
if (unlikely(mapped_addr == -1))
if (!test_and_set_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
queue_work(ehea_driver_wq, &ehea_rereg_mr_task);
return mapped_addr;
}
int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
{
int ret;
u64 *pt;
void *pg;
u64 hret, pt_abs, i, j, m, mr_len;
u32 acc_ctrl = EHEA_MR_ACC_CTRL;
mr_len = ehea_bmap.valid_sections * EHEA_SECTSIZE;
pt = kzalloc(EHEA_MAX_RPAGE * sizeof(u64), 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,
EHEA_BUSMAP_START, mr_len,
acc_ctrl, adapter->pd,
&mr->handle, &mr->lkey);
if (hret != H_SUCCESS) {
ehea_error("alloc_resource_mr failed");
ret = -EIO;
goto out;
}
for (i = 0 ; i < ehea_bmap.entries; i++)
if (ehea_bmap.vaddr[i]) {
void *sectbase = __va(i << SECTION_SIZE_BITS);
unsigned long k = 0;
for (j = 0; j < (PAGES_PER_SECTION / EHEA_MAX_RPAGE);
j++) {
for (m = 0; m < EHEA_MAX_RPAGE; m++) {
pg = sectbase + ((k++) * EHEA_PAGESIZE);
pt[m] = virt_to_abs(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);
ehea_error("register_rpage_mr failed");
ret = -EIO;
goto out;
}
}
}
if (hret != H_SUCCESS) {
ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
ehea_error("registering mr failed");
ret = -EIO;
goto out;
}
mr->vaddr = EHEA_BUSMAP_START;
mr->adapter = adapter;
ret = 0;
out:
kfree(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) {
ehea_error("destroy MR failed");
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;
}
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 == 0x8) /* Queue Pair */
ehea_error("QP (resource=%lX) state: AER=0x%lX, AERR=0x%lX, "
"port=%lX", resource, data[6], data[12], data[22]);
if (type == 0x4) /* Completion Queue */
ehea_error("CQ (resource=%lX) state: AER=0x%lX", resource,
data[6]);
if (type == 0x3) /* Event Queue */
ehea_error("EQ (resource=%lX) state: AER=0x%lX", resource,
data[6]);
ehea_dump(data, length, "error data");
}
void ehea_error_data(struct ehea_adapter *adapter, u64 res_handle)
{
unsigned long ret;
u64 *rblock;
rblock = kzalloc(PAGE_SIZE, GFP_KERNEL);
if (!rblock) {
ehea_error("Cannot allocate rblock memory.");
return;
}
ret = ehea_h_error_data(adapter->handle,
res_handle,
rblock);
if (ret == H_R_STATE)
ehea_error("No error data is available: %lX.", res_handle);
else if (ret == H_SUCCESS)
print_error_data(rblock);
else
ehea_error("Error data could not be fetched: %lX", res_handle);
kfree(rblock);
}