Commit 1dde532d authored by Rahul Lakkireddy's avatar Rahul Lakkireddy Committed by David S. Miller
Browse files

cxgb4: collect hardware dump in second kernel 



Register callback to collect hardware/firmware dumps in second kernel
before hardware/firmware is initialized. The dumps for each device
will be available as elf notes in /proc/vmcore in second kernel.

Signed-off-by: default avatarRahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: default avatarGanesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7efe48df

drivers/net/ethernet/chelsio/cxgb4/cxgb4.h

+4 −0
Original line number Diff line number Diff line
@@ -50,6 +50,7 @@ 
#include <linux/net_tstamp.h>

#include <linux/ptp_clock_kernel.h>

#include <linux/ptp_classify.h>

#include <linux/crash_dump.h>

#include <asm/io.h>

#include "t4_chip_type.h"

#include "cxgb4_uld.h"
@@ -964,6 +965,9 @@ struct adapter { 
	struct hma_data hma;



	struct srq_data *srq;



	/* Dump buffer for collecting logs in kdump kernel */

	struct vmcoredd_data vmcoredd;

};



/* Support for "sched-class" command to allow a TX Scheduling Class to be

drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c

+25 −0
Original line number Diff line number Diff line
@@ -488,3 +488,28 @@ void cxgb4_init_ethtool_dump(struct adapter *adapter) 
	adapter->eth_dump.version = adapter->params.fw_vers;

	adapter->eth_dump.len = 0;

}



static int cxgb4_cudbg_vmcoredd_collect(struct vmcoredd_data *data, void *buf)

{

	struct adapter *adap = container_of(data, struct adapter, vmcoredd);

	u32 len = data->size;



	return cxgb4_cudbg_collect(adap, buf, &len, CXGB4_ETH_DUMP_ALL);

}



int cxgb4_cudbg_vmcore_add_dump(struct adapter *adap)

{

	struct vmcoredd_data *data = &adap->vmcoredd;

	u32 len;



	len = sizeof(struct cudbg_hdr) +

	      sizeof(struct cudbg_entity_hdr) * CUDBG_MAX_ENTITY;

	len += CUDBG_DUMP_BUFF_SIZE;



	data->size = len;

	snprintf(data->dump_name, sizeof(data->dump_name), "%s_%s",

		 cxgb4_driver_name, adap->name);

	data->vmcoredd_callback = cxgb4_cudbg_vmcoredd_collect;



	return vmcore_add_device_dump(data);

}

drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.h

+3 −0
Original line number Diff line number Diff line
@@ -41,8 +41,11 @@ enum CXGB4_ETHTOOL_DUMP_FLAGS { 
	CXGB4_ETH_DUMP_HW = (1 << 1), /* various FW and HW dumps */

};



#define CXGB4_ETH_DUMP_ALL (CXGB4_ETH_DUMP_MEM | CXGB4_ETH_DUMP_HW)



u32 cxgb4_get_dump_length(struct adapter *adap, u32 flag);

int cxgb4_cudbg_collect(struct adapter *adap, void *buf, u32 *buf_size,

			u32 flag);

void cxgb4_init_ethtool_dump(struct adapter *adapter);

int cxgb4_cudbg_vmcore_add_dump(struct adapter *adap);

#endif /* __CXGB4_CUDBG_H__ */

drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c

+10 −0
Original line number Diff line number Diff line
@@ -5558,6 +5558,16 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 
	if (err)

		goto out_free_adapter;



	if (is_kdump_kernel()) {

		/* Collect hardware state and append to /proc/vmcore */

		err = cxgb4_cudbg_vmcore_add_dump(adapter);

		if (err) {

			dev_warn(adapter->pdev_dev,

				 "Fail collecting vmcore device dump, err: %d. Continuing\n",

				 err);

			err = 0;

		}

	}



	if (!is_t4(adapter->params.chip)) {

		s_qpp = (QUEUESPERPAGEPF0_S +

CRA Git | Maintained and supported by SUSTech CRA and CCSE