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Message-Id: <1303421937-2325-18-git-send-email-dykmanj@linux.vnet.ibm.com>
Date: Thu, 21 Apr 2011 17:38:47 -0400
From: dykmanj@...ux.vnet.ibm.com
To: netdev@...r.kernel.org
Cc: Jim Dykman <dykmanj@...ux.vnet.ibm.com>,
Piyush Chaudhary <piyushc@...ux.vnet.ibm.com>,
Fu-Chung Chang <fcchang@...ux.vnet.ibm.com>,
" William S. Cadden" <wscadden@...ux.vnet.ibm.com>,
" Wen C. Chen" <winstonc@...ux.vnet.ibm.com>,
Scot Sakolish <sakolish@...ux.vnet.ibm.com>,
Jian Xiao <jian@...ux.vnet.ibm.com>,
" Carol L. Soto" <clsoto@...ux.vnet.ibm.com>,
" Sarah J. Sheppard" <sjsheppa@...ux.vnet.ibm.com>
Subject: [PATCH v3 17/27] HFI: Set up and call the open window hypercall
From: Jim Dykman <dykmanj@...ux.vnet.ibm.com>
Signed-off-by: Piyush Chaudhary <piyushc@...ux.vnet.ibm.com>
Signed-off-by: Jim Dykman <dykmanj@...ux.vnet.ibm.com>
Signed-off-by: Fu-Chung Chang <fcchang@...ux.vnet.ibm.com>
Signed-off-by: William S. Cadden <wscadden@...ux.vnet.ibm.com>
Signed-off-by: Wen C. Chen <winstonc@...ux.vnet.ibm.com>
Signed-off-by: Scot Sakolish <sakolish@...ux.vnet.ibm.com>
Signed-off-by: Jian Xiao <jian@...ux.vnet.ibm.com>
Signed-off-by: Carol L. Soto <clsoto@...ux.vnet.ibm.com>
Signed-off-by: Sarah J. Sheppard <sjsheppa@...ux.vnet.ibm.com>
---
drivers/net/hfi/core/hfidd_window.c | 179 +++++++++++++++++++++++++++++++++++
include/linux/hfi/hfidd_hcalls.h | 2 +
2 files changed, 181 insertions(+), 0 deletions(-)
diff --git a/drivers/net/hfi/core/hfidd_window.c b/drivers/net/hfi/core/hfidd_window.c
index 6d90af6..c20277b 100644
--- a/drivers/net/hfi/core/hfidd_window.c
+++ b/drivers/net/hfi/core/hfidd_window.c
@@ -359,6 +359,105 @@ static int hfi_validate_window_parm(struct hfidd_acs *p_acs,
return 0;
}
+/*
+ * Setup a page for phyp with the window parameters needed for
+ * OPEN WINDOW hcall
+ */
+int hfi_build_window_info(struct hfidd_acs *p_acs, struct hfidd_window *win_p)
+{
+ caddr_t laddr;
+
+#define WIN_INFO (win_p->win_open_info_p)
+#define CLIENT_INFO (win_p->client_info)
+
+ /* OPEN WINDOW hcall requires a page to pass arguments */
+ win_p->win_open_info_p = (struct win_open_info *)
+ __get_free_pages(GFP_KERNEL, get_order(PAGE_SIZE_4K));
+ if (win_p->win_open_info_p == NULL) {
+
+ dev_printk(KERN_ERR, p_acs->hfidd_dev,
+ "hfi_build_window_info: ___get_free_pages failed\n");
+ return -ENOMEM;
+ }
+ memset((void *)(win_p->win_open_info_p), 0, PAGE_SIZE_4K);
+
+ /* Translate virtual adress into logical addres */
+ laddr = (caddr_t)__pa((caddr_t)win_p->win_open_info_p);
+
+ win_p->win_open_info_laddr = laddr;
+ WIN_INFO->job_id = CLIENT_INFO.job_id;
+ WIN_INFO->protection_domain = win_p->job_id;
+
+ WIN_INFO->sfifo_base_eaddr = CLIENT_INFO.sfifo.eaddr.use.allu;
+ WIN_INFO->sfifo_lkey = win_p->sfifo_x_tab->l_key;
+ WIN_INFO->sfifo_size = CLIENT_INFO.sfifo.size;
+ WIN_INFO->sfifo_finish_vec = CLIENT_INFO.sfifo_finish_vec.use.allu;
+
+ WIN_INFO->rfifo_base_eaddr = CLIENT_INFO.rfifo.eaddr.use.allu;
+ WIN_INFO->rfifo_lkey = win_p->rfifo_x_tab->l_key;
+ WIN_INFO->rfifo_size = CLIENT_INFO.rfifo.size;
+
+ /* Save IP context */
+ WIN_INFO->is_ip_window = win_p->is_ip;
+ if (win_p->is_ip) {
+ WIN_INFO->multicast_enable = HFI_MULTICAST_ENABLE;
+ WIN_INFO->disable_src_isr_id_stamp = 0;
+ WIN_INFO->logical_port_id_valid = 0;
+ WIN_INFO->logical_port_id = 0;
+ }
+
+ return 0;
+}
+
+/* Free the phyp page used at OPEN WINDOW hcall */
+static inline void hfi_destroy_window_info(struct hfidd_acs *p_acs,
+ struct hfidd_window *win_p)
+{
+ free_pages((unsigned long)win_p->win_open_info_p,
+ get_order(PAGE_SIZE_4K));
+ win_p->win_open_info_p = NULL;
+}
+
+/* Call to OPEN WINDOW hcall */
+static int hfi_hcall_to_open_window(struct hfidd_acs *p_acs,
+ struct hfidd_window *win_p)
+{
+ int rc = 0;
+ long long hvrc = 0;
+ u64 ummio_regs;
+ u64 pmmio_regs;
+ u64 send_intr;
+ u64 recv_intr;
+
+ hvrc = hfi_open_window(p_acs->dds.hfi_id,
+ win_p->index,
+ H_OPEN,
+ (u64)win_p->win_open_info_laddr,
+ &ummio_regs,
+ &pmmio_regs,
+ &send_intr,
+ &recv_intr);
+
+ if (hvrc != H_SUCCESS) {
+ if (hvrc == H_HARDWARE) {
+ win_p->state = WIN_HERROR;
+ rc = -EIO;
+ } else {
+ rc = -EINVAL;
+ }
+ dev_printk(KERN_ERR, p_acs->hfidd_dev,
+ "hfi_hcall_to_open_window: OPEN WINDOW failed, "
+ "hvrc=0x%llx\n", hvrc);
+ return rc;
+ }
+
+ /* Copy mmio_regs logical page from OPEN_WINDOW hcall */
+ win_p->mmio_regs = ummio_regs;
+ win_p->send_intr = (unsigned int)send_intr;
+ win_p->recv_intr = (unsigned int)recv_intr;
+
+ return 0;
+}
/*
* Map the Effective Address pages for Memory Regions.
@@ -573,6 +672,31 @@ sfifo_err:
return rc;
}
+/* Free all the window memory regions */
+static int hfi_takedown_window_in_MMU(struct hfidd_acs *p_acs,
+ unsigned int is_userspace, struct hfidd_window *win_p)
+{
+ int rc = 0;
+
+ rc = hfi_unregister_MMU(p_acs, win_p->rfifo_x_tab);
+ if (rc != 0) {
+ dev_printk(KERN_ERR, p_acs->hfidd_dev,
+ "hfi_takedown_window_in_MMU: rfifo mr failed,"
+ "rc = 0x%x\n", rc);
+ return rc;
+ }
+
+ rc = hfi_unregister_MMU(p_acs, win_p->sfifo_x_tab);
+ if (rc != 0) {
+ dev_printk(KERN_ERR, p_acs->hfidd_dev,
+ "hfi_takedown_window_in_MMU: sfifo mr failed,"
+ "rc = 0x%x\n", rc);
+ return rc;
+ }
+
+ return rc;
+}
+
static int hfi_xlate_fifos(struct hfidd_acs *p_acs,
unsigned int is_userspace,
struct hfidd_window *win_p,
@@ -701,6 +825,19 @@ static int hfi_alloc_win_resource(struct hfidd_acs *p_acs,
return 0;
}
+static int hfi_destroy_window_parm(struct hfidd_acs *p_acs,
+ unsigned int is_userspace,
+ struct hfidd_window *win_p,
+ struct hfi_client_info *client_p)
+{
+ int rc = 0;
+
+ hfi_destroy_window_info(p_acs, win_p);
+
+ rc = hfi_takedown_window_in_MMU(p_acs, is_userspace, win_p);
+ return rc;
+}
+
static int hfi_setup_window_parm(struct hfidd_acs *p_acs,
unsigned int is_userspace,
struct hfidd_window *win_p,
@@ -719,8 +856,20 @@ static int hfi_setup_window_parm(struct hfidd_acs *p_acs,
"failed, rc = 0x%x\n", rc);
goto setup_window_parm_err1;
}
+
+ /* Build window information for OPEN WINDOW hcall */
+ rc = hfi_build_window_info(p_acs, win_p);
+ if (rc) {
+ dev_printk(KERN_ERR, p_acs->hfidd_dev,
+ "hfi_setup_window_parm: hfi_build_window_info "
+ "failed, rc = 0x%x\n", rc);
+ goto setup_window_parm_err2;
+ }
+
return 0;
+setup_window_parm_err2:
+ hfi_takedown_window_in_MMU(p_acs, is_userspace, win_p);
setup_window_parm_err1:
return rc;
}
@@ -783,9 +932,39 @@ int hfidd_open_window_func(struct hfidd_acs *p_acs, unsigned int is_userspace,
goto hfidd_open_window_func_err3;
}
+ rc = hfi_hcall_to_open_window(p_acs, win_p);
+ if (rc) {
+ dev_printk(KERN_ERR, p_acs->hfidd_dev,
+ "hfidd_open_window_func: hfi_hcall_to_open_window "
+ "failed, rc = 0x%x\n", rc);
+ goto hfidd_open_window_func_err4;
+ }
+
+ /* tell user the local ISR id */
+ local_p->local_isrid = p_acs->isr;
+ win_p->client_info.local_isrid = p_acs->isr;
+
+ /* Copy out the client info back to user */
+ rc = hfi_copy_to_user((void *)out_p, (void *)local_p,
+ is_userspace, sizeof(struct hfi_client_info));
+ if (rc) {
+ dev_printk(KERN_ERR, p_acs->hfidd_dev,
+ "hfidd_open_window_func: hfi_copy_to_user "
+ "failed, rc = 0x%x\n", rc);
+ goto hfidd_open_window_func_err4;
+ }
+
+ spin_lock(&(win_p->win_lock));
+ /* Update the window information */
+ win_p->pid = current->tgid;
+ win_p->state = WIN_OPENED;
+ spin_unlock(&(win_p->win_lock));
+
kfree(local_p);
return rc;
+hfidd_open_window_func_err4:
+ hfi_destroy_window_parm(p_acs, is_userspace, win_p, local_p);
hfidd_open_window_func_err3:
hfi_free_win_resource(p_acs, is_userspace, win_p, local_p);
hfidd_open_window_func_err2:
diff --git a/include/linux/hfi/hfidd_hcalls.h b/include/linux/hfi/hfidd_hcalls.h
index a97bb5e..1e007c5 100644
--- a/include/linux/hfi/hfidd_hcalls.h
+++ b/include/linux/hfi/hfidd_hcalls.h
@@ -70,6 +70,8 @@
#define HFI_ACCESS_CTL_SHIFT 32
+#define HFI_MULTICAST_ENABLE 1
+
struct win_open_info {
/* Hyp Feedback */
unsigned long long hypervisor_capabilities;
--
1.7.3.5
--
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