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Commit 37bff2b9 authored by Yuval Mintz's avatar Yuval Mintz Committed by David S. Miller
Browse files

qed: Add VF->PF channel infrastructure 



Communication between VF and PF is based on a dedicated HW channel;
VF will prepare a messge, and by signaling the HW the PF would get a
notification of that message existance. The PF would then copy the
message, process it and DMA an answer back to the VF as a response.

The messages themselves are TLV-based - allowing easier backward/forward
compatibility.

This patch adds the infrastructure of the channel on the PF side -
starting with the arrival of the notification and ending with DMAing
the response back to the VF.

It also adds a dummy-response as reference, as it only lays the
groundwork of the communication; it doesn't really add support of any
actual messages.

Signed-off-by: default avatarYuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 32a47e72

drivers/net/ethernet/qlogic/qed/qed.h

+6 −0
Original line number Diff line number Diff line
@@ -378,6 +378,12 @@ struct qed_hwfn { 


	struct qed_simd_fp_handler	simd_proto_handler[64];



#ifdef CONFIG_QED_SRIOV

	struct workqueue_struct *iov_wq;

	struct delayed_work iov_task;

	unsigned long iov_task_flags;

#endif



	struct z_stream_s		*stream;

};

drivers/net/ethernet/qlogic/qed/qed_dev_api.h

+24 −3
Original line number Diff line number Diff line
@@ -183,10 +183,14 @@ enum qed_dmae_address_type_t { 
 * using DMA

 */

#define QED_DMAE_FLAG_RW_REPL_SRC	0x00000001

#define QED_DMAE_FLAG_VF_SRC		0x00000002

#define QED_DMAE_FLAG_VF_DST		0x00000004

#define QED_DMAE_FLAG_COMPLETION_DST	0x00000008



struct qed_dmae_params {

	u32 flags; /* consists of QED_DMAE_FLAG_* values */

	u8 src_vfid;

	u8 dst_vfid;

};



/**
@@ -208,6 +212,23 @@ qed_dmae_host2grc(struct qed_hwfn *p_hwfn, 
		  u32 size_in_dwords,

		  u32 flags);



/**

 * @brief qed_dmae_host2host - copy data from to source address

 * to a destination adress (for SRIOV) using the given ptt

 *

 * @param p_hwfn

 * @param p_ptt

 * @param source_addr

 * @param dest_addr

 * @param size_in_dwords

 * @param params

 */

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);



/**

 * @brief qed_chain_alloc - Allocate and initialize a chain

 *

drivers/net/ethernet/qlogic/qed/qed_hsi.h

+1 −1
Original line number Diff line number Diff line
@@ -31,7 +31,7 @@ enum common_event_opcode { 
	COMMON_EVENT_PF_STOP,

	COMMON_EVENT_RESERVED,

	COMMON_EVENT_RESERVED2,

	COMMON_EVENT_RESERVED3,

	COMMON_EVENT_VF_PF_CHANNEL,

	COMMON_EVENT_RESERVED4,

	COMMON_EVENT_RESERVED5,

	COMMON_EVENT_RESERVED6,

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

+38 −6
Original line number Diff line number Diff line
@@ -355,8 +355,8 @@ static void qed_dmae_opcode(struct qed_hwfn *p_hwfn, 
			    const u8 is_dst_type_grc,

			    struct qed_dmae_params *p_params)

{

	u16 opcode_b = 0;

	u32 opcode = 0;

	u16 opcodeB = 0;



	/* Whether the source is the PCIe or the GRC.

	 * 0- The source is the PCIe
@@ -398,14 +398,24 @@ static void qed_dmae_opcode(struct qed_hwfn *p_hwfn, 
	opcode |= (DMAE_CMD_DST_ADDR_RESET_MASK <<

		   DMAE_CMD_DST_ADDR_RESET_SHIFT);



	opcodeB |= (DMAE_CMD_SRC_VF_ID_MASK <<

		    DMAE_CMD_SRC_VF_ID_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;

	}



	opcodeB |= (DMAE_CMD_DST_VF_ID_MASK <<

		    DMAE_CMD_DST_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(opcodeB);

	p_hwfn->dmae_info.p_dmae_cmd->opcode_b = cpu_to_le16(opcode_b);

}



u32 qed_dmae_idx_to_go_cmd(u8 idx)
@@ -753,6 +763,28 @@ int qed_dmae_host2grc(struct qed_hwfn *p_hwfn, 
	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;

}



u16 qed_get_qm_pq(struct qed_hwfn *p_hwfn,

		  enum protocol_type proto,

		  union qed_qm_pq_params *p_params)

drivers/net/ethernet/qlogic/qed/qed_main.c

+9 −1
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <linux/qed/qed_if.h>



#include "qed.h"

#include "qed_sriov.h"

#include "qed_sp.h"

#include "qed_dev_api.h"

#include "qed_mcp.h"
@@ -749,7 +750,10 @@ static int qed_slowpath_start(struct qed_dev *cdev, 
	struct qed_mcp_drv_version drv_version;

	const u8 *data = NULL;

	struct qed_hwfn *hwfn;

	int rc;

	int rc = -EINVAL;



	if (qed_iov_wq_start(cdev))

		goto err;



	rc = request_firmware(&cdev->firmware, QED_FW_FILE_NAME,

			      &cdev->pdev->dev);
@@ -826,6 +830,8 @@ static int qed_slowpath_start(struct qed_dev *cdev, 
err:

	release_firmware(cdev->firmware);



	qed_iov_wq_stop(cdev, false);



	return rc;

}
@@ -842,6 +848,8 @@ static int qed_slowpath_stop(struct qed_dev *cdev) 
	qed_disable_msix(cdev);

	qed_nic_reset(cdev);



	qed_iov_wq_stop(cdev, true);



	release_firmware(cdev->firmware);



	return 0;