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linux/drivers/net/ethernet/qlogic/qed/qed_hw.c

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/* QLogic qed NIC Driver
* Copyright (c) 2015-2017 QLogic Corporation
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and /or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/types.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/qed/qed_chain.h>
#include "qed.h"
#include "qed_hsi.h"
#include "qed_hw.h"
#include "qed_reg_addr.h"
#include "qed_sriov.h"
#define QED_BAR_ACQUIRE_TIMEOUT 1000
/* Invalid values */
#define QED_BAR_INVALID_OFFSET (cpu_to_le32(-1))
struct qed_ptt {
struct list_head list_entry;
unsigned int idx;
struct pxp_ptt_entry pxp;
u8 hwfn_id;
};
struct qed_ptt_pool {
struct list_head free_list;
spinlock_t lock; /* ptt synchronized access */
struct qed_ptt ptts[PXP_EXTERNAL_BAR_PF_WINDOW_NUM];
};
int qed_ptt_pool_alloc(struct qed_hwfn *p_hwfn)
{
struct qed_ptt_pool *p_pool = kmalloc(sizeof(*p_pool), GFP_KERNEL);
int i;
if (!p_pool)
return -ENOMEM;
INIT_LIST_HEAD(&p_pool->free_list);
for (i = 0; i < PXP_EXTERNAL_BAR_PF_WINDOW_NUM; i++) {
p_pool->ptts[i].idx = i;
p_pool->ptts[i].pxp.offset = QED_BAR_INVALID_OFFSET;
p_pool->ptts[i].pxp.pretend.control = 0;
p_pool->ptts[i].hwfn_id = p_hwfn->my_id;
if (i >= RESERVED_PTT_MAX)
list_add(&p_pool->ptts[i].list_entry,
&p_pool->free_list);
}
p_hwfn->p_ptt_pool = p_pool;
spin_lock_init(&p_pool->lock);
return 0;
}
void qed_ptt_invalidate(struct qed_hwfn *p_hwfn)
{
struct qed_ptt *p_ptt;
int i;
for (i = 0; i < PXP_EXTERNAL_BAR_PF_WINDOW_NUM; i++) {
p_ptt = &p_hwfn->p_ptt_pool->ptts[i];
p_ptt->pxp.offset = QED_BAR_INVALID_OFFSET;
}
}
void qed_ptt_pool_free(struct qed_hwfn *p_hwfn)
{
kfree(p_hwfn->p_ptt_pool);
p_hwfn->p_ptt_pool = NULL;
}
struct qed_ptt *qed_ptt_acquire(struct qed_hwfn *p_hwfn)
{
struct qed_ptt *p_ptt;
unsigned int i;
/* Take the free PTT from the list */
for (i = 0; i < QED_BAR_ACQUIRE_TIMEOUT; i++) {
spin_lock_bh(&p_hwfn->p_ptt_pool->lock);
if (!list_empty(&p_hwfn->p_ptt_pool->free_list)) {
p_ptt = list_first_entry(&p_hwfn->p_ptt_pool->free_list,
struct qed_ptt, list_entry);
list_del(&p_ptt->list_entry);
spin_unlock_bh(&p_hwfn->p_ptt_pool->lock);
DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
"allocated ptt %d\n", p_ptt->idx);
return p_ptt;
}
spin_unlock_bh(&p_hwfn->p_ptt_pool->lock);
usleep_range(1000, 2000);
}
DP_NOTICE(p_hwfn, "PTT acquire timeout - failed to allocate PTT\n");
return NULL;
}
void qed_ptt_release(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
spin_lock_bh(&p_hwfn->p_ptt_pool->lock);
list_add(&p_ptt->list_entry, &p_hwfn->p_ptt_pool->free_list);
spin_unlock_bh(&p_hwfn->p_ptt_pool->lock);
}
u32 qed_ptt_get_hw_addr(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
/* The HW is using DWORDS and we need to translate it to Bytes */
return le32_to_cpu(p_ptt->pxp.offset) << 2;
}
static u32 qed_ptt_config_addr(struct qed_ptt *p_ptt)
{
return PXP_PF_WINDOW_ADMIN_PER_PF_START +
p_ptt->idx * sizeof(struct pxp_ptt_entry);
}
u32 qed_ptt_get_bar_addr(struct qed_ptt *p_ptt)
{
return PXP_EXTERNAL_BAR_PF_WINDOW_START +
p_ptt->idx * PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE;
}
void qed_ptt_set_win(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt, u32 new_hw_addr)
{
u32 prev_hw_addr;
prev_hw_addr = qed_ptt_get_hw_addr(p_hwfn, p_ptt);
if (new_hw_addr == prev_hw_addr)
return;
/* Update PTT entery in admin window */
DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
"Updating PTT entry %d to offset 0x%x\n",
p_ptt->idx, new_hw_addr);
/* The HW is using DWORDS and the address is in Bytes */
p_ptt->pxp.offset = cpu_to_le32(new_hw_addr >> 2);
REG_WR(p_hwfn,
qed_ptt_config_addr(p_ptt) +
offsetof(struct pxp_ptt_entry, offset),
le32_to_cpu(p_ptt->pxp.offset));
}
static u32 qed_set_ptt(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt, u32 hw_addr)
{
u32 win_hw_addr = qed_ptt_get_hw_addr(p_hwfn, p_ptt);
u32 offset;
offset = hw_addr - win_hw_addr;
if (p_ptt->hwfn_id != p_hwfn->my_id)
DP_NOTICE(p_hwfn,
"ptt[%d] of hwfn[%02x] is used by hwfn[%02x]!\n",
p_ptt->idx, p_ptt->hwfn_id, p_hwfn->my_id);
/* Verify the address is within the window */
if (hw_addr < win_hw_addr ||
offset >= PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE) {
qed_ptt_set_win(p_hwfn, p_ptt, hw_addr);
offset = 0;
}
return qed_ptt_get_bar_addr(p_ptt) + offset;
}
struct qed_ptt *qed_get_reserved_ptt(struct qed_hwfn *p_hwfn,
enum reserved_ptts ptt_idx)
{
if (ptt_idx >= RESERVED_PTT_MAX) {
DP_NOTICE(p_hwfn,
"Requested PTT %d is out of range\n", ptt_idx);
return NULL;
}
return &p_hwfn->p_ptt_pool->ptts[ptt_idx];
}
void qed_wr(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
u32 hw_addr, u32 val)
{
u32 bar_addr = qed_set_ptt(p_hwfn, p_ptt, hw_addr);
REG_WR(p_hwfn, bar_addr, val);
DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
"bar_addr 0x%x, hw_addr 0x%x, val 0x%x\n",
bar_addr, hw_addr, val);
}
u32 qed_rd(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
u32 hw_addr)
{
u32 bar_addr = qed_set_ptt(p_hwfn, p_ptt, hw_addr);
u32 val = REG_RD(p_hwfn, bar_addr);
DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
"bar_addr 0x%x, hw_addr 0x%x, val 0x%x\n",
bar_addr, hw_addr, val);
return val;
}
static void qed_memcpy_hw(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
void *addr, u32 hw_addr, size_t n, bool to_device)
{
u32 dw_count, *host_addr, hw_offset;
size_t quota, done = 0;
u32 __iomem *reg_addr;
while (done < n) {
quota = min_t(size_t, n - done,
PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE);
if (IS_PF(p_hwfn->cdev)) {
qed_ptt_set_win(p_hwfn, p_ptt, hw_addr + done);
hw_offset = qed_ptt_get_bar_addr(p_ptt);
} else {
hw_offset = hw_addr + done;
}
dw_count = quota / 4;
host_addr = (u32 *)((u8 *)addr + done);
reg_addr = (u32 __iomem *)REG_ADDR(p_hwfn, hw_offset);
if (to_device)
while (dw_count--)
DIRECT_REG_WR(reg_addr++, *host_addr++);
else
while (dw_count--)
*host_addr++ = DIRECT_REG_RD(reg_addr++);
done += quota;
}
}
void qed_memcpy_from(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt, void *dest, u32 hw_addr, size_t n)
{
DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
"hw_addr 0x%x, dest %p hw_addr 0x%x, size %lu\n",
hw_addr, dest, hw_addr, (unsigned long)n);
qed_memcpy_hw(p_hwfn, p_ptt, dest, hw_addr, n, false);
}
void qed_memcpy_to(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt, u32 hw_addr, void *src, size_t n)
{
DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
"hw_addr 0x%x, hw_addr 0x%x, src %p size %lu\n",
hw_addr, hw_addr, src, (unsigned long)n);
qed_memcpy_hw(p_hwfn, p_ptt, src, hw_addr, n, true);
}
void qed_fid_pretend(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, u16 fid)
{
u16 control = 0;
SET_FIELD(control, PXP_PRETEND_CMD_IS_CONCRETE, 1);
SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_FUNCTION, 1);
/* Every pretend undos previous pretends, including
* previous port pretend.
*/
SET_FIELD(control, PXP_PRETEND_CMD_PORT, 0);
SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 0);
SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
if (!GET_FIELD(fid, PXP_CONCRETE_FID_VFVALID))
fid = GET_FIELD(fid, PXP_CONCRETE_FID_PFID);
p_ptt->pxp.pretend.control = cpu_to_le16(control);
p_ptt->pxp.pretend.fid.concrete_fid.fid = cpu_to_le16(fid);
REG_WR(p_hwfn,
qed_ptt_config_addr(p_ptt) +
offsetof(struct pxp_ptt_entry, pretend),
*(u32 *)&p_ptt->pxp.pretend);
}
void qed_port_pretend(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt, u8 port_id)
{
u16 control = 0;
SET_FIELD(control, PXP_PRETEND_CMD_PORT, port_id);
SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 1);
SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
p_ptt->pxp.pretend.control = cpu_to_le16(control);
REG_WR(p_hwfn,
qed_ptt_config_addr(p_ptt) +
offsetof(struct pxp_ptt_entry, pretend),
*(u32 *)&p_ptt->pxp.pretend);
}
void qed_port_unpretend(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
u16 control = 0;
SET_FIELD(control, PXP_PRETEND_CMD_PORT, 0);
SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 0);
SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
p_ptt->pxp.pretend.control = cpu_to_le16(control);
REG_WR(p_hwfn,
qed_ptt_config_addr(p_ptt) +
offsetof(struct pxp_ptt_entry, pretend),
*(u32 *)&p_ptt->pxp.pretend);
}
void qed_port_fid_pretend(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt, u8 port_id, u16 fid)
{
u16 control = 0;
SET_FIELD(control, PXP_PRETEND_CMD_PORT, port_id);
SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 1);
SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
SET_FIELD(control, PXP_PRETEND_CMD_IS_CONCRETE, 1);
SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_FUNCTION, 1);
if (!GET_FIELD(fid, PXP_CONCRETE_FID_VFVALID))
fid = GET_FIELD(fid, PXP_CONCRETE_FID_PFID);
p_ptt->pxp.pretend.control = cpu_to_le16(control);
p_ptt->pxp.pretend.fid.concrete_fid.fid = cpu_to_le16(fid);
REG_WR(p_hwfn,
qed_ptt_config_addr(p_ptt) +
offsetof(struct pxp_ptt_entry, pretend),
*(u32 *)&p_ptt->pxp.pretend);
}
u32 qed_vfid_to_concrete(struct qed_hwfn *p_hwfn, u8 vfid)
{
u32 concrete_fid = 0;
SET_FIELD(concrete_fid, PXP_CONCRETE_FID_PFID, p_hwfn->rel_pf_id);
SET_FIELD(concrete_fid, PXP_CONCRETE_FID_VFID, vfid);
SET_FIELD(concrete_fid, PXP_CONCRETE_FID_VFVALID, 1);
return concrete_fid;
}
/* DMAE */
static void qed_dmae_opcode(struct qed_hwfn *p_hwfn,
const u8 is_src_type_grc,
const u8 is_dst_type_grc,
struct qed_dmae_params *p_params)
{
u16 opcode_b = 0;
u32 opcode = 0;
/* Whether the source is the PCIe or the GRC.
* 0- The source is the PCIe
* 1- The source is the GRC.
*/
opcode |= (is_src_type_grc ? DMAE_CMD_SRC_MASK_GRC
: DMAE_CMD_SRC_MASK_PCIE) <<
DMAE_CMD_SRC_SHIFT;
opcode |= ((p_hwfn->rel_pf_id & DMAE_CMD_SRC_PF_ID_MASK) <<
DMAE_CMD_SRC_PF_ID_SHIFT);
/* The destination of the DMA can be: 0-None 1-PCIe 2-GRC 3-None */
opcode |= (is_dst_type_grc ? DMAE_CMD_DST_MASK_GRC
: DMAE_CMD_DST_MASK_PCIE) <<
DMAE_CMD_DST_SHIFT;
opcode |= ((p_hwfn->rel_pf_id & DMAE_CMD_DST_PF_ID_MASK) <<
DMAE_CMD_DST_PF_ID_SHIFT);
/* Whether to write a completion word to the completion destination:
* 0-Do not write a completion word
* 1-Write the completion word
*/
opcode |= (DMAE_CMD_COMP_WORD_EN_MASK << DMAE_CMD_COMP_WORD_EN_SHIFT);
opcode |= (DMAE_CMD_SRC_ADDR_RESET_MASK <<
DMAE_CMD_SRC_ADDR_RESET_SHIFT);
if (p_params->flags & QED_DMAE_FLAG_COMPLETION_DST)
opcode |= (1 << DMAE_CMD_COMP_FUNC_SHIFT);
opcode |= (DMAE_CMD_ENDIANITY << DMAE_CMD_ENDIANITY_MODE_SHIFT);
opcode |= ((p_hwfn->port_id) << DMAE_CMD_PORT_ID_SHIFT);
/* reset source address in next go */
opcode |= (DMAE_CMD_SRC_ADDR_RESET_MASK <<
DMAE_CMD_SRC_ADDR_RESET_SHIFT);
/* reset dest address in next go */
opcode |= (DMAE_CMD_DST_ADDR_RESET_MASK <<
DMAE_CMD_DST_ADDR_RESET_SHIFT);
/* SRC/DST VFID: all 1's - pf, otherwise VF id */
if (p_params->flags & QED_DMAE_FLAG_VF_SRC) {
opcode |= 1 << DMAE_CMD_SRC_VF_ID_VALID_SHIFT;
opcode_b |= p_params->src_vfid << DMAE_CMD_SRC_VF_ID_SHIFT;
} else {
opcode_b |= DMAE_CMD_SRC_VF_ID_MASK <<
DMAE_CMD_SRC_VF_ID_SHIFT;
}
if (p_params->flags & QED_DMAE_FLAG_VF_DST) {
opcode |= 1 << DMAE_CMD_DST_VF_ID_VALID_SHIFT;
opcode_b |= p_params->dst_vfid << DMAE_CMD_DST_VF_ID_SHIFT;
} else {
opcode_b |= DMAE_CMD_DST_VF_ID_MASK << DMAE_CMD_DST_VF_ID_SHIFT;
}
p_hwfn->dmae_info.p_dmae_cmd->opcode = cpu_to_le32(opcode);
p_hwfn->dmae_info.p_dmae_cmd->opcode_b = cpu_to_le16(opcode_b);
}
u32 qed_dmae_idx_to_go_cmd(u8 idx)
{
/* All the DMAE 'go' registers form an array in internal memory */
return DMAE_REG_GO_C0 + (idx << 2);
}
static int qed_dmae_post_command(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt)
{
struct dmae_cmd *p_command = p_hwfn->dmae_info.p_dmae_cmd;
u8 idx_cmd = p_hwfn->dmae_info.channel, i;
int qed_status = 0;
/* verify address is not NULL */
if ((((!p_command->dst_addr_lo) && (!p_command->dst_addr_hi)) ||
((!p_command->src_addr_lo) && (!p_command->src_addr_hi)))) {
DP_NOTICE(p_hwfn,
"source or destination address 0 idx_cmd=%d\n"
"opcode = [0x%08x,0x%04x] len=0x%x src=0x%x:%x dst=0x%x:%x\n",
idx_cmd,
le32_to_cpu(p_command->opcode),
le16_to_cpu(p_command->opcode_b),
le16_to_cpu(p_command->length_dw),
le32_to_cpu(p_command->src_addr_hi),
le32_to_cpu(p_command->src_addr_lo),
le32_to_cpu(p_command->dst_addr_hi),
le32_to_cpu(p_command->dst_addr_lo));
return -EINVAL;
}
DP_VERBOSE(p_hwfn,
NETIF_MSG_HW,
"Posting DMAE command [idx %d]: opcode = [0x%08x,0x%04x] len=0x%x src=0x%x:%x dst=0x%x:%x\n",
idx_cmd,
le32_to_cpu(p_command->opcode),
le16_to_cpu(p_command->opcode_b),
le16_to_cpu(p_command->length_dw),
le32_to_cpu(p_command->src_addr_hi),
le32_to_cpu(p_command->src_addr_lo),
le32_to_cpu(p_command->dst_addr_hi),
le32_to_cpu(p_command->dst_addr_lo));
/* Copy the command to DMAE - need to do it before every call
* for source/dest address no reset.
* The first 9 DWs are the command registers, the 10 DW is the
* GO register, and the rest are result registers
* (which are read only by the client).
*/
for (i = 0; i < DMAE_CMD_SIZE; i++) {
u32 data = (i < DMAE_CMD_SIZE_TO_FILL) ?
*(((u32 *)p_command) + i) : 0;
qed_wr(p_hwfn, p_ptt,
DMAE_REG_CMD_MEM +
(idx_cmd * DMAE_CMD_SIZE * sizeof(u32)) +
(i * sizeof(u32)), data);
}
qed_wr(p_hwfn, p_ptt, qed_dmae_idx_to_go_cmd(idx_cmd), DMAE_GO_VALUE);
return qed_status;
}
int qed_dmae_info_alloc(struct qed_hwfn *p_hwfn)
{
dma_addr_t *p_addr = &p_hwfn->dmae_info.completion_word_phys_addr;
struct dmae_cmd **p_cmd = &p_hwfn->dmae_info.p_dmae_cmd;
u32 **p_buff = &p_hwfn->dmae_info.p_intermediate_buffer;
u32 **p_comp = &p_hwfn->dmae_info.p_completion_word;
*p_comp = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
sizeof(u32), p_addr, GFP_KERNEL);
if (!*p_comp)
goto err;
p_addr = &p_hwfn->dmae_info.dmae_cmd_phys_addr;
*p_cmd = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
sizeof(struct dmae_cmd),
p_addr, GFP_KERNEL);
if (!*p_cmd)
goto err;
p_addr = &p_hwfn->dmae_info.intermediate_buffer_phys_addr;
*p_buff = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
sizeof(u32) * DMAE_MAX_RW_SIZE,
p_addr, GFP_KERNEL);
if (!*p_buff)
goto err;
p_hwfn->dmae_info.channel = p_hwfn->rel_pf_id;
return 0;
err:
qed_dmae_info_free(p_hwfn);
return -ENOMEM;
}
void qed_dmae_info_free(struct qed_hwfn *p_hwfn)
{
dma_addr_t p_phys;
/* Just make sure no one is in the middle */
mutex_lock(&p_hwfn->dmae_info.mutex);
if (p_hwfn->dmae_info.p_completion_word) {
p_phys = p_hwfn->dmae_info.completion_word_phys_addr;
dma_free_coherent(&p_hwfn->cdev->pdev->dev,
sizeof(u32),
p_hwfn->dmae_info.p_completion_word, p_phys);
p_hwfn->dmae_info.p_completion_word = NULL;
}
if (p_hwfn->dmae_info.p_dmae_cmd) {
p_phys = p_hwfn->dmae_info.dmae_cmd_phys_addr;
dma_free_coherent(&p_hwfn->cdev->pdev->dev,
sizeof(struct dmae_cmd),
p_hwfn->dmae_info.p_dmae_cmd, p_phys);
p_hwfn->dmae_info.p_dmae_cmd = NULL;
}
if (p_hwfn->dmae_info.p_intermediate_buffer) {
p_phys = p_hwfn->dmae_info.intermediate_buffer_phys_addr;
dma_free_coherent(&p_hwfn->cdev->pdev->dev,
sizeof(u32) * DMAE_MAX_RW_SIZE,
p_hwfn->dmae_info.p_intermediate_buffer,
p_phys);
p_hwfn->dmae_info.p_intermediate_buffer = NULL;
}
mutex_unlock(&p_hwfn->dmae_info.mutex);
}
static int qed_dmae_operation_wait(struct qed_hwfn *p_hwfn)
{
u32 wait_cnt_limit = 10000, wait_cnt = 0;
int qed_status = 0;
barrier();
while (*p_hwfn->dmae_info.p_completion_word != DMAE_COMPLETION_VAL) {
udelay(DMAE_MIN_WAIT_TIME);
if (++wait_cnt > wait_cnt_limit) {
DP_NOTICE(p_hwfn->cdev,
"Timed-out waiting for operation to complete. Completion word is 0x%08x expected 0x%08x.\n",
*p_hwfn->dmae_info.p_completion_word,
DMAE_COMPLETION_VAL);
qed_status = -EBUSY;
break;
}
/* to sync the completion_word since we are not
* using the volatile keyword for p_completion_word
*/
barrier();
}
if (qed_status == 0)
*p_hwfn->dmae_info.p_completion_word = 0;
return qed_status;
}
static int qed_dmae_execute_sub_operation(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
u64 src_addr,
u64 dst_addr,
u8 src_type,
u8 dst_type,
u32 length_dw)
{
dma_addr_t phys = p_hwfn->dmae_info.intermediate_buffer_phys_addr;
struct dmae_cmd *cmd = p_hwfn->dmae_info.p_dmae_cmd;
int qed_status = 0;
switch (src_type) {
case QED_DMAE_ADDRESS_GRC:
case QED_DMAE_ADDRESS_HOST_PHYS:
cmd->src_addr_hi = cpu_to_le32(upper_32_bits(src_addr));
cmd->src_addr_lo = cpu_to_le32(lower_32_bits(src_addr));
break;
/* for virtual source addresses we use the intermediate buffer. */
case QED_DMAE_ADDRESS_HOST_VIRT:
cmd->src_addr_hi = cpu_to_le32(upper_32_bits(phys));
cmd->src_addr_lo = cpu_to_le32(lower_32_bits(phys));
memcpy(&p_hwfn->dmae_info.p_intermediate_buffer[0],
(void *)(uintptr_t)src_addr,
length_dw * sizeof(u32));
break;
default:
return -EINVAL;
}
switch (dst_type) {
case QED_DMAE_ADDRESS_GRC:
case QED_DMAE_ADDRESS_HOST_PHYS:
cmd->dst_addr_hi = cpu_to_le32(upper_32_bits(dst_addr));
cmd->dst_addr_lo = cpu_to_le32(lower_32_bits(dst_addr));
break;
/* for virtual source addresses we use the intermediate buffer. */
case QED_DMAE_ADDRESS_HOST_VIRT:
cmd->dst_addr_hi = cpu_to_le32(upper_32_bits(phys));
cmd->dst_addr_lo = cpu_to_le32(lower_32_bits(phys));
break;
default:
return -EINVAL;
}
cmd->length_dw = cpu_to_le16((u16)length_dw);
qed_dmae_post_command(p_hwfn, p_ptt);
qed_status = qed_dmae_operation_wait(p_hwfn);
if (qed_status) {
DP_NOTICE(p_hwfn,
"qed_dmae_host2grc: Wait Failed. source_addr 0x%llx, grc_addr 0x%llx, size_in_dwords 0x%x\n",
src_addr, dst_addr, length_dw);
return qed_status;
}
if (dst_type == QED_DMAE_ADDRESS_HOST_VIRT)
memcpy((void *)(uintptr_t)(dst_addr),
&p_hwfn->dmae_info.p_intermediate_buffer[0],
length_dw * sizeof(u32));
return 0;
}
static int qed_dmae_execute_command(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
u64 src_addr, u64 dst_addr,
u8 src_type, u8 dst_type,
u32 size_in_dwords,
struct qed_dmae_params *p_params)
{
dma_addr_t phys = p_hwfn->dmae_info.completion_word_phys_addr;
u16 length_cur = 0, i = 0, cnt_split = 0, length_mod = 0;
struct dmae_cmd *cmd = p_hwfn->dmae_info.p_dmae_cmd;
u64 src_addr_split = 0, dst_addr_split = 0;
u16 length_limit = DMAE_MAX_RW_SIZE;
int qed_status = 0;
u32 offset = 0;
qed_dmae_opcode(p_hwfn,
(src_type == QED_DMAE_ADDRESS_GRC),
(dst_type == QED_DMAE_ADDRESS_GRC),
p_params);
cmd->comp_addr_lo = cpu_to_le32(lower_32_bits(phys));
cmd->comp_addr_hi = cpu_to_le32(upper_32_bits(phys));
cmd->comp_val = cpu_to_le32(DMAE_COMPLETION_VAL);
/* Check if the grc_addr is valid like < MAX_GRC_OFFSET */
cnt_split = size_in_dwords / length_limit;
length_mod = size_in_dwords % length_limit;
src_addr_split = src_addr;
dst_addr_split = dst_addr;
for (i = 0; i <= cnt_split; i++) {
offset = length_limit * i;
if (!(p_params->flags & QED_DMAE_FLAG_RW_REPL_SRC)) {
if (src_type == QED_DMAE_ADDRESS_GRC)
src_addr_split = src_addr + offset;
else
src_addr_split = src_addr + (offset * 4);
}
if (dst_type == QED_DMAE_ADDRESS_GRC)
dst_addr_split = dst_addr + offset;
else
dst_addr_split = dst_addr + (offset * 4);
length_cur = (cnt_split == i) ? length_mod : length_limit;
/* might be zero on last iteration */
if (!length_cur)
continue;
qed_status = qed_dmae_execute_sub_operation(p_hwfn,
p_ptt,
src_addr_split,
dst_addr_split,
src_type,
dst_type,
length_cur);
if (qed_status) {
DP_NOTICE(p_hwfn,
"qed_dmae_execute_sub_operation Failed with error 0x%x. source_addr 0x%llx, destination addr 0x%llx, size_in_dwords 0x%x\n",
qed_status, src_addr, dst_addr, length_cur);
break;
}
}
return qed_status;
}
int qed_dmae_host2grc(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
u64 source_addr, u32 grc_addr, u32 size_in_dwords, u32 flags)
{
u32 grc_addr_in_dw = grc_addr / sizeof(u32);
struct qed_dmae_params params;
int rc;
memset(&params, 0, sizeof(struct qed_dmae_params));
params.flags = flags;
mutex_lock(&p_hwfn->dmae_info.mutex);
rc = qed_dmae_execute_command(p_hwfn, p_ptt, source_addr,
grc_addr_in_dw,
QED_DMAE_ADDRESS_HOST_VIRT,
QED_DMAE_ADDRESS_GRC,
size_in_dwords, &params);
mutex_unlock(&p_hwfn->dmae_info.mutex);
return rc;
}
int qed_dmae_grc2host(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
u32 grc_addr,
dma_addr_t dest_addr, u32 size_in_dwords, u32 flags)
{
u32 grc_addr_in_dw = grc_addr / sizeof(u32);
struct qed_dmae_params params;
int rc;
memset(&params, 0, sizeof(struct qed_dmae_params));
params.flags = flags;
mutex_lock(&p_hwfn->dmae_info.mutex);
rc = qed_dmae_execute_command(p_hwfn, p_ptt, grc_addr_in_dw,
dest_addr, QED_DMAE_ADDRESS_GRC,
QED_DMAE_ADDRESS_HOST_VIRT,
size_in_dwords, &params);
mutex_unlock(&p_hwfn->dmae_info.mutex);
return rc;
}
int qed_dmae_host2host(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
dma_addr_t source_addr,
dma_addr_t dest_addr,
u32 size_in_dwords, struct qed_dmae_params *p_params)
{
int rc;
mutex_lock(&(p_hwfn->dmae_info.mutex));
rc = qed_dmae_execute_command(p_hwfn, p_ptt, source_addr,
dest_addr,
QED_DMAE_ADDRESS_HOST_PHYS,
QED_DMAE_ADDRESS_HOST_PHYS,
size_in_dwords, p_params);
mutex_unlock(&(p_hwfn->dmae_info.mutex));
return rc;
}
int qed_dmae_sanity(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt, const char *phase)
{
u32 size = PAGE_SIZE / 2, val;
struct qed_dmae_params params;
int rc = 0;
dma_addr_t p_phys;
void *p_virt;
u32 *p_tmp;
p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
2 * size, &p_phys, GFP_KERNEL);
if (!p_virt) {
DP_NOTICE(p_hwfn,
"DMAE sanity [%s]: failed to allocate memory\n",
phase);
return -ENOMEM;
}
/* Fill the bottom half of the allocated memory with a known pattern */
for (p_tmp = (u32 *)p_virt;
p_tmp < (u32 *)((u8 *)p_virt + size); p_tmp++) {
/* Save the address itself as the value */
val = (u32)(uintptr_t)p_tmp;
*p_tmp = val;
}
/* Zero the top half of the allocated memory */
memset((u8 *)p_virt + size, 0, size);
DP_VERBOSE(p_hwfn,
QED_MSG_SP,
"DMAE sanity [%s]: src_addr={phys 0x%llx, virt %p}, dst_addr={phys 0x%llx, virt %p}, size 0x%x\n",
phase,
(u64)p_phys,
p_virt, (u64)(p_phys + size), (u8 *)p_virt + size, size);
memset(&params, 0, sizeof(params));
rc = qed_dmae_host2host(p_hwfn, p_ptt, p_phys, p_phys + size,
size / 4 /* size_in_dwords */, &params);
if (rc) {
DP_NOTICE(p_hwfn,
"DMAE sanity [%s]: qed_dmae_host2host() failed. rc = %d.\n",
phase, rc);
goto out;
}
/* Verify that the top half of the allocated memory has the pattern */
for (p_tmp = (u32 *)((u8 *)p_virt + size);
p_tmp < (u32 *)((u8 *)p_virt + (2 * size)); p_tmp++) {
/* The corresponding address in the bottom half */
val = (u32)(uintptr_t)p_tmp - size;
if (*p_tmp != val) {
DP_NOTICE(p_hwfn,
"DMAE sanity [%s]: addr={phys 0x%llx, virt %p}, read_val 0x%08x, expected_val 0x%08x\n",
phase,
(u64)p_phys + ((u8 *)p_tmp - (u8 *)p_virt),
p_tmp, *p_tmp, val);
rc = -EINVAL;
goto out;
}
}
out:
dma_free_coherent(&p_hwfn->cdev->pdev->dev, 2 * size, p_virt, p_phys);
return rc;
}
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