Commit d731feea authored by Christophe Lombard's avatar Christophe Lombard Committed by Michael Ellerman
Browse files

ocxl: Update the Process Element Entry 



To complete the MMIO based mechanism, the fields: PASID, bus, device and
function of the Process Element Entry have to be filled. (See
OpenCAPI Power Platform Architecture document)

                   Hypervisor Process Element Entry
Word
    0 1 .... 7  8  ...... 12  13 ..15  16.... 19  20 ........... 31
0                  OSL Configuration State (0:31)
1                  OSL Configuration State (32:63)
2               PASID                      |    Reserved
3       Bus   |   Device    |Function |        Reserved
4                             Reserved
5                             Reserved
6                               ....

Signed-off-by: default avatarChristophe Lombard <clombard@linux.vnet.ibm.com>
Acked-by: default avatarFrederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201125155013.39955-4-clombard@linux.vnet.ibm.com
parent 19b311ca

drivers/misc/ocxl/context.c

+3 −1
Original line number Diff line number Diff line
@@ -70,6 +70,7 @@ int ocxl_context_attach(struct ocxl_context *ctx, u64 amr, struct mm_struct *mm) 
{

	int rc;

	unsigned long pidr = 0;

	struct pci_dev *dev;



	// Locks both status & tidr

	mutex_lock(&ctx->status_mutex);
@@ -81,8 +82,9 @@ int ocxl_context_attach(struct ocxl_context *ctx, u64 amr, struct mm_struct *mm) 
	if (mm)

		pidr = mm->context.id;



	dev = to_pci_dev(ctx->afu->fn->dev.parent);

	rc = ocxl_link_add_pe(ctx->afu->fn->link, ctx->pasid, pidr, ctx->tidr,

			      amr, mm, xsl_fault_error, ctx);

			      amr, pci_dev_id(dev), mm, xsl_fault_error, ctx);

	if (rc)

		goto out;

drivers/misc/ocxl/link.c

+3 −1
Original line number Diff line number Diff line
@@ -494,7 +494,7 @@ static u64 calculate_cfg_state(bool kernel) 
}



int ocxl_link_add_pe(void *link_handle, int pasid, u32 pidr, u32 tidr,

		u64 amr, struct mm_struct *mm,

		u64 amr, u16 bdf, struct mm_struct *mm,

		void (*xsl_err_cb)(void *data, u64 addr, u64 dsisr),

		void *xsl_err_data)

{
@@ -529,6 +529,8 @@ int ocxl_link_add_pe(void *link_handle, int pasid, u32 pidr, u32 tidr, 


	memset(pe, 0, sizeof(struct ocxl_process_element));

	pe->config_state = cpu_to_be64(calculate_cfg_state(pidr == 0));

	pe->pasid = cpu_to_be32(pasid << (31 - 19));

	pe->bdf = cpu_to_be16(bdf);

	pe->lpid = cpu_to_be32(mfspr(SPRN_LPID));

	pe->pid = cpu_to_be32(pidr);

	pe->tid = cpu_to_be32(tidr);

drivers/misc/ocxl/ocxl_internal.h

+6 −3
Original line number Diff line number Diff line
@@ -84,13 +84,16 @@ struct ocxl_context { 


struct ocxl_process_element {

	__be64 config_state;

	__be32 reserved1[11];

	__be32 pasid;

	__be16 bdf;

	__be16 reserved1;

	__be32 reserved2[9];

	__be32 lpid;

	__be32 tid;

	__be32 pid;

	__be32 reserved2[10];

	__be32 reserved3[10];

	__be64 amr;

	__be32 reserved3[3];

	__be32 reserved4[3];

	__be32 software_state;

};

drivers/scsi/cxlflash/ocxl_hw.c

+4 −2
Original line number Diff line number Diff line
@@ -329,6 +329,7 @@ static int start_context(struct ocxlflash_context *ctx) 
	struct ocxl_hw_afu *afu = ctx->hw_afu;

	struct ocxl_afu_config *acfg = &afu->acfg;

	void *link_token = afu->link_token;

	struct pci_dev *pdev = afu->pdev;

	struct device *dev = afu->dev;

	bool master = ctx->master;

	struct mm_struct *mm;
@@ -360,8 +361,9 @@ static int start_context(struct ocxlflash_context *ctx) 
		mm = current->mm;

	}



	rc = ocxl_link_add_pe(link_token, ctx->pe, pid, 0, 0, mm,

			      ocxlflash_xsl_fault, ctx);

	rc = ocxl_link_add_pe(link_token, ctx->pe, pid, 0, 0,

			      pci_dev_id(pdev), mm, ocxlflash_xsl_fault,

			      ctx);

	if (unlikely(rc)) {

		dev_err(dev, "%s: ocxl_link_add_pe failed rc=%d\n",

			__func__, rc);

include/misc/ocxl.h

+1 −1
Original line number Diff line number Diff line
@@ -447,7 +447,7 @@ void ocxl_link_release(struct pci_dev *dev, void *link_handle); 
 * defined

 */

int ocxl_link_add_pe(void *link_handle, int pasid, u32 pidr, u32 tidr,

		u64 amr, struct mm_struct *mm,

		u64 amr, u16 bdf, struct mm_struct *mm,

		void (*xsl_err_cb)(void *data, u64 addr, u64 dsisr),

		void *xsl_err_data);

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