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nvethernet: Add OSD IVC support

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In case of virtualization the OSI functions will be handled
at Ethernet Server. Add IVC support where OSD can send
IVC packets to ethernet server. Ethernet Server parses the
messages and calls the corresponding OSI API.

Bug 2694285

Change-Id: I0f8a23d33fe3fc87e2582101a6bef6f911e1226d
Signed-off-by: Nagaraj Annaiah <nannaiah@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2439193
Reviewed-by: Bhadram Varka <vbhadram@nvidia.com>
Reviewed-by: Rakesh Goyal <rgoyal@nvidia.com>
Reviewed-by: Ashutosh Jha <ajha@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
nannaiah
2020-10-30 09:48:44 -07:00
committed by Revanth Kumar Uppala
parent c606c85e93
commit ca57e74aea
4 changed files with 190 additions and 91 deletions
Download Patch File Download Diff File Expand all files Collapse all files

76
drivers/net/ethernet/nvidia/nvethernet/osd.c
View File

@@ -16,6 +16,9 @@
#include "ether_linux.h"
#include <osd.h>
#include <ivc_core.h>
#define IVC_WAIT_TIMEOUT (msecs_to_jiffies(1000))
/**
* @brief Adds delay in micro seconds.
@@ -398,3 +401,76 @@ void osd_transmit_complete(void *priv, void *buffer, unsigned long dmaaddr,
dev_consume_skb_any(skb);
}
}
/**
* @brief osd_send_cmd - OSD ivc send cmd
*
* @param[in] priv: OSD private data
* @param[in] func: data
* @param[in] line: len
* @note
* API Group:
* - Initialization: Yes
* - Run time: Yes
* - De-initialization: Yes
*/
int osd_ivc_send_cmd(void *priv, void *data, unsigned int len)
{
int ret = -1;
#if (LINUX_VERSION_CODE <= KERNEL_VERSION(5, 9, 0))
unsigned long flags = 0;
static int cnt = 0;
struct osi_core_priv_data *core = (struct osi_core_priv_data *)priv;
ivc_msg_common *ivc_buf = (ivc_msg_common *) data;
struct ether_priv_data *pdata = (struct ether_priv_data *)core->osd;
struct ether_ivc_ctxt *ictxt = &pdata->ictxt;
struct tegra_hv_ivc_cookie *ivck =
(struct tegra_hv_ivc_cookie *) ictxt->ivck;
int dcnt = 50;
int is_atomic = 0;
if (len > ETHER_MAX_IVC_BUF) {
dev_err(pdata->dev, "Invalid IVC len\n");
return -1;
}
ivc_buf->status = -1;
spin_lock_irqsave(&ictxt->ivck_lock, flags);
if (in_atomic()) {
preempt_enable();
is_atomic = 1;
}
ivc_buf->count = cnt++;
/* Waiting for the channel to be ready */
while (tegra_hv_ivc_channel_notified(ivck) != 0){
osd_msleep(1);
dcnt--;
if (!dcnt) {
pr_err("IVC recv timeout\n");
goto fail;
}
}
/* Write the current message for the ethernet server */
ret = tegra_hv_ivc_write(ivck, ivc_buf, len);
if (ret != len) {
dev_err(pdata->dev, "IVC write len %d ret %d cmd %d failed\n",
len, ret, ivc_buf->cmd);
goto fail;
}
while (!tegra_hv_ivc_can_read(ictxt->ivck)) {
wait_for_completion_timeout(&ictxt->msg_complete, IVC_WAIT_TIMEOUT);
}
ret = tegra_hv_ivc_read(ivck, ivc_buf, len);
if (ret < 0) {
dev_err(pdata->dev, "IVC read failed: %d\n", ret);
}
if (is_atomic) {
preempt_disable();
}
ret = ivc_buf->status;
fail:
spin_unlock_irqrestore(&ictxt->ivck_lock, flags);
#endif
return ret;
}